diff options
Diffstat (limited to 'drivers/gpio')
44 files changed, 582 insertions, 650 deletions
diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index a86c49a605c..4a1b5113e52 100644 --- a/drivers/gpio/Kconfig +++ b/drivers/gpio/Kconfig @@ -56,6 +56,7 @@ config GPIO_ACPI depends on ACPI config GPIOLIB_IRQCHIP + select IRQ_DOMAIN bool config DEBUG_GPIO @@ -243,6 +244,15 @@ config GPIO_OCTEON Say yes here to support the on-chip GPIO lines on the OCTEON family of SOCs. +config GPIO_OMAP + bool "TI OMAP GPIO support" if COMPILE_TEST && !ARCH_OMAP2PLUS + default y if ARCH_OMAP + depends on ARM + select GENERIC_IRQ_CHIP + select GPIOLIB_IRQCHIP + help + Say yes here to enable GPIO support for TI OMAP SoCs. + config GPIO_PL061 bool "PrimeCell PL061 GPIO support" depends on ARM_AMBA @@ -259,7 +269,7 @@ config GPIO_PXA config GPIO_RCAR tristate "Renesas R-Car GPIO" - depends on ARM + depends on ARM && (ARCH_SHMOBILE || COMPILE_TEST) help Say yes here to support GPIO on Renesas R-Car SoCs. @@ -510,6 +520,7 @@ config GPIO_PCA953X config GPIO_PCA953X_IRQ bool "Interrupt controller support for PCA953x" depends on GPIO_PCA953X=y + select GPIOLIB_IRQCHIP help Say yes here to enable the pca953x to be used as an interrupt controller. It requires the driver to be built in the kernel. @@ -579,6 +590,7 @@ config GPIO_STP_XWAY config GPIO_TC3589X bool "TC3589X GPIOs" depends on MFD_TC3589X + select GPIOLIB_IRQCHIP help This enables support for the GPIOs found on the TC3589X I/O Expander. @@ -699,13 +711,13 @@ config GPIO_AMD8111 config GPIO_INTEL_MID bool "Intel Mid GPIO support" depends on PCI && X86 - select IRQ_DOMAIN + select GPIOLIB_IRQCHIP help Say Y here to support Intel Mid GPIO. config GPIO_PCH tristate "Intel EG20T PCH/LAPIS Semiconductor IOH(ML7223/ML7831) GPIO" - depends on PCI && X86 + depends on PCI && (X86_32 || COMPILE_TEST) select GENERIC_IRQ_CHIP help This driver is for PCH(Platform controller Hub) GPIO of Intel Topcliff @@ -739,7 +751,7 @@ config GPIO_SODAVILLE config GPIO_TIMBERDALE bool "Support for timberdale GPIO IP" - depends on MFD_TIMBERDALE && HAS_IOMEM + depends on MFD_TIMBERDALE ---help--- Add support for the GPIO IP in the timberdale FPGA. diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile index 6309aff1d80..d10f6a9d875 100644 --- a/drivers/gpio/Makefile +++ b/drivers/gpio/Makefile @@ -58,7 +58,7 @@ obj-$(CONFIG_GPIO_MVEBU) += gpio-mvebu.o obj-$(CONFIG_GPIO_MXC) += gpio-mxc.o obj-$(CONFIG_GPIO_MXS) += gpio-mxs.o obj-$(CONFIG_GPIO_OCTEON) += gpio-octeon.o -obj-$(CONFIG_ARCH_OMAP) += gpio-omap.o +obj-$(CONFIG_GPIO_OMAP) += gpio-omap.o obj-$(CONFIG_GPIO_PCA953X) += gpio-pca953x.o obj-$(CONFIG_GPIO_PCF857X) += gpio-pcf857x.o obj-$(CONFIG_GPIO_PCH) += gpio-pch.o diff --git a/drivers/gpio/devres.c b/drivers/gpio/devres.c index 307464fd015..65978cf85f7 100644 --- a/drivers/gpio/devres.c +++ b/drivers/gpio/devres.c @@ -52,6 +52,22 @@ struct gpio_desc *__must_check devm_gpiod_get(struct device *dev, EXPORT_SYMBOL(devm_gpiod_get); /** + * devm_gpiod_get_optional - Resource-managed gpiod_get_optional() + * @dev: GPIO consumer + * @con_id: function within the GPIO consumer + * + * Managed gpiod_get_optional(). GPIO descriptors returned from this function + * are automatically disposed on driver detach. See gpiod_get_optional() for + * detailed information about behavior and return values. + */ +struct gpio_desc *__must_check devm_gpiod_get_optional(struct device *dev, + const char *con_id) +{ + return devm_gpiod_get_index_optional(dev, con_id, 0); +} +EXPORT_SYMBOL(devm_gpiod_get_optional); + +/** * devm_gpiod_get_index - Resource-managed gpiod_get_index() * @dev: GPIO consumer * @con_id: function within the GPIO consumer @@ -87,6 +103,33 @@ struct gpio_desc *__must_check devm_gpiod_get_index(struct device *dev, EXPORT_SYMBOL(devm_gpiod_get_index); /** + * devm_gpiod_get_index_optional - Resource-managed gpiod_get_index_optional() + * @dev: GPIO consumer + * @con_id: function within the GPIO consumer + * @index: index of the GPIO to obtain in the consumer + * + * Managed gpiod_get_index_optional(). GPIO descriptors returned from this + * function are automatically disposed on driver detach. See + * gpiod_get_index_optional() for detailed information about behavior and + * return values. + */ +struct gpio_desc *__must_check devm_gpiod_get_index_optional(struct device *dev, + const char *con_id, + unsigned int index) +{ + struct gpio_desc *desc; + + desc = devm_gpiod_get_index(dev, con_id, index); + if (IS_ERR(desc)) { + if (PTR_ERR(desc) == -ENOENT) + return NULL; + } + + return desc; +} +EXPORT_SYMBOL(devm_gpiod_get_index_optional); + +/** * devm_gpiod_put - Resource-managed gpiod_put() * @desc: GPIO descriptor to dispose of * diff --git a/drivers/gpio/gpio-adp5520.c b/drivers/gpio/gpio-adp5520.c index 613265944e2..f1ade8fa321 100644 --- a/drivers/gpio/gpio-adp5520.c +++ b/drivers/gpio/gpio-adp5520.c @@ -106,10 +106,8 @@ static int adp5520_gpio_probe(struct platform_device *pdev) } dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL); - if (dev == NULL) { - dev_err(&pdev->dev, "failed to alloc memory\n"); + if (dev == NULL) return -ENOMEM; - } dev->master = pdev->dev.parent; diff --git a/drivers/gpio/gpio-adp5588.c b/drivers/gpio/gpio-adp5588.c index d974020b78b..ef19bc33f2b 100644 --- a/drivers/gpio/gpio-adp5588.c +++ b/drivers/gpio/gpio-adp5588.c @@ -379,10 +379,8 @@ static int adp5588_gpio_probe(struct i2c_client *client, } dev = kzalloc(sizeof(*dev), GFP_KERNEL); - if (dev == NULL) { - dev_err(&client->dev, "failed to alloc memory\n"); + if (dev == NULL) return -ENOMEM; - } dev->client = client; diff --git a/drivers/gpio/gpio-bt8xx.c b/drivers/gpio/gpio-bt8xx.c index ecb3ca2d1d1..6557147d933 100644 --- a/drivers/gpio/gpio-bt8xx.c +++ b/drivers/gpio/gpio-bt8xx.c @@ -178,7 +178,7 @@ static int bt8xxgpio_probe(struct pci_dev *dev, struct bt8xxgpio *bg; int err; - bg = kzalloc(sizeof(*bg), GFP_KERNEL); + bg = devm_kzalloc(&dev->dev, sizeof(struct bt8xxgpio), GFP_KERNEL); if (!bg) return -ENOMEM; @@ -188,9 +188,9 @@ static int bt8xxgpio_probe(struct pci_dev *dev, err = pci_enable_device(dev); if (err) { printk(KERN_ERR "bt8xxgpio: Can't enable device.\n"); - goto err_freebg; + return err; } - if (!request_mem_region(pci_resource_start(dev, 0), + if (!devm_request_mem_region(&dev->dev, pci_resource_start(dev, 0), pci_resource_len(dev, 0), "bt8xxgpio")) { printk(KERN_WARNING "bt8xxgpio: Can't request iomem (0x%llx).\n", @@ -201,11 +201,11 @@ static int bt8xxgpio_probe(struct pci_dev *dev, pci_set_master(dev); pci_set_drvdata(dev, bg); - bg->mmio = ioremap(pci_resource_start(dev, 0), 0x1000); + bg->mmio = devm_ioremap(&dev->dev, pci_resource_start(dev, 0), 0x1000); if (!bg->mmio) { printk(KERN_ERR "bt8xxgpio: ioremap() failed\n"); err = -EIO; - goto err_release_mem; + goto err_disable; } /* Disable interrupts */ @@ -220,18 +220,13 @@ static int bt8xxgpio_probe(struct pci_dev *dev, err = gpiochip_add(&bg->gpio); if (err) { printk(KERN_ERR "bt8xxgpio: Failed to register GPIOs\n"); - goto err_release_mem; + goto err_disable; } return 0; -err_release_mem: - release_mem_region(pci_resource_start(dev, 0), - pci_resource_len(dev, 0)); err_disable: pci_disable_device(dev); -err_freebg: - kfree(bg); return err; } @@ -250,8 +245,6 @@ static void bt8xxgpio_remove(struct pci_dev *pdev) release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); pci_disable_device(pdev); - - kfree(bg); } #ifdef CONFIG_PM diff --git a/drivers/gpio/gpio-davinci.c b/drivers/gpio/gpio-davinci.c index 339f9dac591..9f0682534e2 100644 --- a/drivers/gpio/gpio-davinci.c +++ b/drivers/gpio/gpio-davinci.c @@ -230,10 +230,8 @@ static int davinci_gpio_probe(struct platform_device *pdev) chips = devm_kzalloc(dev, ngpio * sizeof(struct davinci_gpio_controller), GFP_KERNEL); - if (!chips) { - dev_err(dev, "Memory allocation failed\n"); + if (!chips) return -ENOMEM; - } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!res) { diff --git a/drivers/gpio/gpio-dwapb.c b/drivers/gpio/gpio-dwapb.c index ed5711f77e2..cd3b8143527 100644 --- a/drivers/gpio/gpio-dwapb.c +++ b/drivers/gpio/gpio-dwapb.c @@ -198,6 +198,8 @@ static int dwapb_irq_set_type(struct irq_data *d, u32 type) break; } + irq_setup_alt_chip(d, type); + writel(level, gpio->regs + GPIO_INTTYPE_LEVEL); writel(polarity, gpio->regs + GPIO_INT_POLARITY); spin_unlock_irqrestore(&bgc->lock, flags); @@ -213,7 +215,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, struct irq_chip_generic *irq_gc; unsigned int hwirq, ngpio = gc->ngpio; struct irq_chip_type *ct; - int err, irq; + int err, irq, i; irq = irq_of_parse_and_map(node, 0); if (!irq) { @@ -227,7 +229,7 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, if (!gpio->domain) return; - err = irq_alloc_domain_generic_chips(gpio->domain, ngpio, 1, + err = irq_alloc_domain_generic_chips(gpio->domain, ngpio, 2, "gpio-dwapb", handle_level_irq, IRQ_NOREQUEST, 0, IRQ_GC_INIT_NESTED_LOCK); @@ -248,20 +250,24 @@ static void dwapb_configure_irqs(struct dwapb_gpio *gpio, irq_gc->reg_base = gpio->regs; irq_gc->private = gpio; - ct = irq_gc->chip_types; - ct->chip.irq_ack = irq_gc_ack_set_bit; - ct->chip.irq_mask = irq_gc_mask_set_bit; - ct->chip.irq_unmask = irq_gc_mask_clr_bit; - ct->chip.irq_set_type = dwapb_irq_set_type; - ct->chip.irq_enable = dwapb_irq_enable; - ct->chip.irq_disable = dwapb_irq_disable; - ct->chip.irq_request_resources = dwapb_irq_reqres; - ct->chip.irq_release_resources = dwapb_irq_relres; - ct->regs.ack = GPIO_PORTA_EOI; - ct->regs.mask = GPIO_INTMASK; - - irq_setup_generic_chip(irq_gc, IRQ_MSK(port->bgc.gc.ngpio), - IRQ_GC_INIT_NESTED_LOCK, IRQ_NOREQUEST, 0); + for (i = 0; i < 2; i++) { + ct = &irq_gc->chip_types[i]; + ct->chip.irq_ack = irq_gc_ack_set_bit; + ct->chip.irq_mask = irq_gc_mask_set_bit; + ct->chip.irq_unmask = irq_gc_mask_clr_bit; + ct->chip.irq_set_type = dwapb_irq_set_type; + ct->chip.irq_enable = dwapb_irq_enable; + ct->chip.irq_disable = dwapb_irq_disable; + ct->chip.irq_request_resources = dwapb_irq_reqres; + ct->chip.irq_release_resources = dwapb_irq_relres; + ct->regs.ack = GPIO_PORTA_EOI; + ct->regs.mask = GPIO_INTMASK; + ct->type = IRQ_TYPE_LEVEL_MASK; + } + + irq_gc->chip_types[0].type = IRQ_TYPE_LEVEL_MASK; + irq_gc->chip_types[1].type = IRQ_TYPE_EDGE_BOTH; + irq_gc->chip_types[1].handler = handle_edge_irq; irq_set_chained_handler(irq, dwapb_irq_handler); irq_set_handler_data(irq, gpio); diff --git a/drivers/gpio/gpio-em.c b/drivers/gpio/gpio-em.c index 8765bd6f48e..cde36054c38 100644 --- a/drivers/gpio/gpio-em.c +++ b/drivers/gpio/gpio-em.c @@ -212,7 +212,7 @@ static void __em_gio_set(struct gpio_chip *chip, unsigned int reg, { /* upper 16 bits contains mask and lower 16 actual value */ em_gio_write(gpio_to_priv(chip), reg, - (1 << (shift + 16)) | (value << shift)); + (BIT(shift + 16)) | (value << shift)); } static void em_gio_set(struct gpio_chip *chip, unsigned offset, int value) @@ -284,7 +284,6 @@ static int em_gio_probe(struct platform_device *pdev) p = devm_kzalloc(&pdev->dev, sizeof(*p), GFP_KERNEL); if (!p) { - dev_err(&pdev->dev, "failed to allocate driver data\n"); ret = -ENOMEM; goto err0; } diff --git a/drivers/gpio/gpio-ep93xx.c b/drivers/gpio/gpio-ep93xx.c index 80829f3c654..dcc2bb4074e 100644 --- a/drivers/gpio/gpio-ep93xx.c +++ b/drivers/gpio/gpio-ep93xx.c @@ -344,37 +344,24 @@ static int ep93xx_gpio_probe(struct platform_device *pdev) { struct ep93xx_gpio *ep93xx_gpio; struct resource *res; - void __iomem *mmio; int i; - int ret; + struct device *dev = &pdev->dev; - ep93xx_gpio = kzalloc(sizeof(*ep93xx_gpio), GFP_KERNEL); + ep93xx_gpio = devm_kzalloc(dev, sizeof(struct ep93xx_gpio), GFP_KERNEL); if (!ep93xx_gpio) return -ENOMEM; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - ret = -ENXIO; - goto exit_free; - } - - if (!request_mem_region(res->start, resource_size(res), pdev->name)) { - ret = -EBUSY; - goto exit_free; - } - - mmio = ioremap(res->start, resource_size(res)); - if (!mmio) { - ret = -ENXIO; - goto exit_release; - } - ep93xx_gpio->mmio_base = mmio; + ep93xx_gpio->mmio_base = devm_ioremap_resource(dev, res); + if (IS_ERR(ep93xx_gpio->mmio_base)) + return PTR_ERR(ep93xx_gpio->mmio_base); for (i = 0; i < ARRAY_SIZE(ep93xx_gpio_banks); i++) { struct bgpio_chip *bgc = &ep93xx_gpio->bgc[i]; struct ep93xx_gpio_bank *bank = &ep93xx_gpio_banks[i]; - if (ep93xx_gpio_add_bank(bgc, &pdev->dev, mmio, bank)) + if (ep93xx_gpio_add_bank(bgc, &pdev->dev, + ep93xx_gpio->mmio_base, bank)) dev_warn(&pdev->dev, "Unable to add gpio bank %s\n", bank->label); } @@ -382,13 +369,6 @@ static int ep93xx_gpio_probe(struct platform_device *pdev) ep93xx_gpio_init_irq(); return 0; - -exit_release: - release_mem_region(res->start, resource_size(res)); -exit_free: - kfree(ep93xx_gpio); - dev_info(&pdev->dev, "%s failed with errno %d\n", __func__, ret); - return ret; } static struct platform_driver ep93xx_gpio_driver = { diff --git a/drivers/gpio/gpio-ge.c b/drivers/gpio/gpio-ge.c index 7b95a4a8318..1237a73c3c9 100644 --- a/drivers/gpio/gpio-ge.c +++ b/drivers/gpio/gpio-ge.c @@ -18,15 +18,9 @@ */ #include <linux/kernel.h> -#include <linux/compiler.h> -#include <linux/init.h> #include <linux/io.h> -#include <linux/of.h> #include <linux/of_device.h> -#include <linux/of_platform.h> #include <linux/of_gpio.h> -#include <linux/gpio.h> -#include <linux/slab.h> #include <linux/module.h> #define GEF_GPIO_DIRECT 0x00 @@ -39,28 +33,26 @@ #define GEF_GPIO_OVERRUN 0x1C #define GEF_GPIO_MODE 0x20 -static void _gef_gpio_set(void __iomem *reg, unsigned int offset, int value) +static void gef_gpio_set(struct gpio_chip *chip, unsigned offset, int value) { + struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip); unsigned int data; - data = ioread32be(reg); - /* value: 0=low; 1=high */ - if (value & 0x1) - data = data | (0x1 << offset); + data = ioread32be(mmchip->regs + GEF_GPIO_OUT); + if (value) + data = data | BIT(offset); else - data = data & ~(0x1 << offset); - - iowrite32be(data, reg); + data = data & ~BIT(offset); + iowrite32be(data, mmchip->regs + GEF_GPIO_OUT); } - static int gef_gpio_dir_in(struct gpio_chip *chip, unsigned offset) { unsigned int data; struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip); data = ioread32be(mmchip->regs + GEF_GPIO_DIRECT); - data = data | (0x1 << offset); + data = data | BIT(offset); iowrite32be(data, mmchip->regs + GEF_GPIO_DIRECT); return 0; @@ -71,11 +63,11 @@ static int gef_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int value) unsigned int data; struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip); - /* Set direction before switching to input */ - _gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value); + /* Set value before switching to output */ + gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value); data = ioread32be(mmchip->regs + GEF_GPIO_DIRECT); - data = data & ~(0x1 << offset); + data = data & ~BIT(offset); iowrite32be(data, mmchip->regs + GEF_GPIO_DIRECT); return 0; @@ -83,116 +75,56 @@ static int gef_gpio_dir_out(struct gpio_chip *chip, unsigned offset, int value) static int gef_gpio_get(struct gpio_chip *chip, unsigned offset) { - unsigned int data; - int state = 0; struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip); - data = ioread32be(mmchip->regs + GEF_GPIO_IN); - state = (int)((data >> offset) & 0x1); - - return state; + return !!(ioread32be(mmchip->regs + GEF_GPIO_IN) & BIT(offset)); } -static void gef_gpio_set(struct gpio_chip *chip, unsigned offset, int value) -{ - struct of_mm_gpio_chip *mmchip = to_of_mm_gpio_chip(chip); - - _gef_gpio_set(mmchip->regs + GEF_GPIO_OUT, offset, value); -} +static const struct of_device_id gef_gpio_ids[] = { + { + .compatible = "gef,sbc610-gpio", + .data = (void *)19, + }, { + .compatible = "gef,sbc310-gpio", + .data = (void *)6, + }, { + .compatible = "ge,imp3a-gpio", + .data = (void *)16, + }, + { } +}; +MODULE_DEVICE_TABLE(of, gef_gpio_ids); -static int __init gef_gpio_init(void) +static int __init gef_gpio_probe(struct platform_device *pdev) { - struct device_node *np; - int retval; - struct of_mm_gpio_chip *gef_gpio_chip; - - for_each_compatible_node(np, NULL, "gef,sbc610-gpio") { - - pr_debug("%s: Initialising GEF GPIO\n", np->full_name); - - /* Allocate chip structure */ - gef_gpio_chip = kzalloc(sizeof(*gef_gpio_chip), GFP_KERNEL); - if (!gef_gpio_chip) { - pr_err("%s: Unable to allocate structure\n", - np->full_name); - continue; - } - - /* Setup pointers to chip functions */ - gef_gpio_chip->gc.of_gpio_n_cells = 2; - gef_gpio_chip->gc.ngpio = 19; - gef_gpio_chip->gc.direction_input = gef_gpio_dir_in; - gef_gpio_chip->gc.direction_output = gef_gpio_dir_out; - gef_gpio_chip->gc.get = gef_gpio_get; - gef_gpio_chip->gc.set = gef_gpio_set; - - /* This function adds a memory mapped GPIO chip */ - retval = of_mm_gpiochip_add(np, gef_gpio_chip); - if (retval) { - kfree(gef_gpio_chip); - pr_err("%s: Unable to add GPIO\n", np->full_name); - } - } - - for_each_compatible_node(np, NULL, "gef,sbc310-gpio") { - - pr_debug("%s: Initialising GEF GPIO\n", np->full_name); - - /* Allocate chip structure */ - gef_gpio_chip = kzalloc(sizeof(*gef_gpio_chip), GFP_KERNEL); - if (!gef_gpio_chip) { - pr_err("%s: Unable to allocate structure\n", - np->full_name); - continue; - } - - /* Setup pointers to chip functions */ - gef_gpio_chip->gc.of_gpio_n_cells = 2; - gef_gpio_chip->gc.ngpio = 6; - gef_gpio_chip->gc.direction_input = gef_gpio_dir_in; - gef_gpio_chip->gc.direction_output = gef_gpio_dir_out; - gef_gpio_chip->gc.get = gef_gpio_get; - gef_gpio_chip->gc.set = gef_gpio_set; - - /* This function adds a memory mapped GPIO chip */ - retval = of_mm_gpiochip_add(np, gef_gpio_chip); - if (retval) { - kfree(gef_gpio_chip); - pr_err("%s: Unable to add GPIO\n", np->full_name); - } - } - - for_each_compatible_node(np, NULL, "ge,imp3a-gpio") { - - pr_debug("%s: Initialising GE GPIO\n", np->full_name); - - /* Allocate chip structure */ - gef_gpio_chip = kzalloc(sizeof(*gef_gpio_chip), GFP_KERNEL); - if (!gef_gpio_chip) { - pr_err("%s: Unable to allocate structure\n", - np->full_name); - continue; - } - - /* Setup pointers to chip functions */ - gef_gpio_chip->gc.of_gpio_n_cells = 2; - gef_gpio_chip->gc.ngpio = 16; - gef_gpio_chip->gc.direction_input = gef_gpio_dir_in; - gef_gpio_chip->gc.direction_output = gef_gpio_dir_out; - gef_gpio_chip->gc.get = gef_gpio_get; - gef_gpio_chip->gc.set = gef_gpio_set; - - /* This function adds a memory mapped GPIO chip */ - retval = of_mm_gpiochip_add(np, gef_gpio_chip); - if (retval) { - kfree(gef_gpio_chip); - pr_err("%s: Unable to add GPIO\n", np->full_name); - } - } + const struct of_device_id *of_id = + of_match_device(gef_gpio_ids, &pdev->dev); + struct of_mm_gpio_chip *mmchip; + + mmchip = devm_kzalloc(&pdev->dev, sizeof(*mmchip), GFP_KERNEL); + if (!mmchip) + return -ENOMEM; + + /* Setup pointers to chip functions */ + mmchip->gc.ngpio = (u16)(uintptr_t)of_id->data; + mmchip->gc.of_gpio_n_cells = 2; + mmchip->gc.direction_input = gef_gpio_dir_in; + mmchip->gc.direction_output = gef_gpio_dir_out; + mmchip->gc.get = gef_gpio_get; + mmchip->gc.set = gef_gpio_set; + + /* This function adds a memory mapped GPIO chip */ + return of_mm_gpiochip_add(pdev->dev.of_node, mmchip); +}; - return 0; +static struct platform_driver gef_gpio_driver = { + .driver = { + .name = "gef-gpio", + .owner = THIS_MODULE, + .of_match_table = gef_gpio_ids, + }, }; -arch_initcall(gef_gpio_init); +module_platform_driver_probe(gef_gpio_driver, gef_gpio_probe); MODULE_DESCRIPTION("GE I/O FPGA GPIO driver"); MODULE_AUTHOR("Martyn Welch <martyn.welch@ge.com"); diff --git a/drivers/gpio/gpio-generic.c b/drivers/gpio/gpio-generic.c index b5dff9e742f..fea8c82bb8f 100644 --- a/drivers/gpio/gpio-generic.c +++ b/drivers/gpio/gpio-generic.c @@ -388,6 +388,14 @@ static int bgpio_setup_direction(struct bgpio_chip *bgc, return 0; } +static int bgpio_request(struct gpio_chip *chip, unsigned gpio_pin) +{ + if (gpio_pin < chip->ngpio) + return 0; + + return -EINVAL; +} + int bgpio_remove(struct bgpio_chip *bgc) { return gpiochip_remove(&bgc->gc); @@ -413,6 +421,7 @@ int bgpio_init(struct bgpio_chip *bgc, struct device *dev, bgc->gc.label = dev_name(dev); bgc->gc.base = -1; bgc->gc.ngpio = bgc->bits; + bgc->gc.request = bgpio_request; ret = bgpio_setup_io(bgc, dat, set, clr); if (ret) diff --git a/drivers/gpio/gpio-grgpio.c b/drivers/gpio/gpio-grgpio.c index 84d2478ec29..3c3f515b791 100644 --- a/drivers/gpio/gpio-grgpio.c +++ b/drivers/gpio/gpio-grgpio.c @@ -481,7 +481,7 @@ out: return ret; } -static struct of_device_id grgpio_match[] = { +static const struct of_device_id grgpio_match[] = { {.name = "GAISLER_GPIO"}, {.name = "01_01a"}, {}, diff --git a/drivers/gpio/gpio-janz-ttl.c b/drivers/gpio/gpio-janz-ttl.c index 2ecd3a09c74..42852eaaf02 100644 --- a/drivers/gpio/gpio-janz-ttl.c +++ b/drivers/gpio/gpio-janz-ttl.c @@ -152,34 +152,21 @@ static int ttl_probe(struct platform_device *pdev) pdata = dev_get_platdata(&pdev->dev); if (!pdata) { dev_err(dev, "no platform data\n"); - ret = -ENXIO; - goto out_return; + return -ENXIO; } - mod = kzalloc(sizeof(*mod), GFP_KERNEL); - if (!mod) { - dev_err(dev, "unable to allocate private data\n"); - ret = -ENOMEM; - goto out_return; - } + mod = devm_kzalloc(dev, sizeof(*mod), GFP_KERNEL); + if (!mod) + return -ENOMEM; platform_set_drvdata(pdev, mod); spin_lock_init(&mod->lock); /* get access to the MODULbus registers for this module */ res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - if (!res) { - dev_err(dev, "MODULbus registers not found\n"); - ret = -ENODEV; - goto out_free_mod; - } - - mod->regs = ioremap(res->start, resource_size(res)); - if (!mod->regs) { - dev_err(dev, "MODULbus registers not ioremap\n"); - ret = -ENOMEM; - goto out_free_mod; - } + mod->regs = devm_ioremap_resource(dev, res); + if (IS_ERR(mod->regs)) + return PTR_ERR(mod->regs); ttl_setup_device(mod); @@ -198,17 +185,10 @@ static int ttl_probe(struct platform_device *pdev) ret = gpiochip_add(gpio); if (ret) { dev_err(dev, "unable to add GPIO chip\n"); - goto out_iounmap_regs; + return ret; } return 0; - -out_iounmap_regs: - iounmap(mod->regs); -out_free_mod: - kfree(mod); -out_return: - return ret; } static int ttl_remove(struct platform_device *pdev) @@ -223,8 +203,6 @@ static int ttl_remove(struct platform_device *pdev) return ret; } - iounmap(mod->regs); - kfree(mod); return 0; } diff --git a/drivers/gpio/gpio-kempld.c b/drivers/gpio/gpio-kempld.c index c6d88173f5a..1e5e51987d3 100644 --- a/drivers/gpio/gpio-kempld.c +++ b/drivers/gpio/gpio-kempld.c @@ -24,7 +24,7 @@ #include <linux/mfd/kempld.h> #define KEMPLD_GPIO_MAX_NUM 16 -#define KEMPLD_GPIO_MASK(x) (1 << ((x) % 8)) +#define KEMPLD_GPIO_MASK(x) (BIT((x) % 8)) #define KEMPLD_GPIO_DIR_NUM(x) (0x40 + (x) / 8) #define KEMPLD_GPIO_LVL_NUM(x) (0x42 + (x) / 8) #define KEMPLD_GPIO_EVT_LVL_EDGE 0x46 @@ -216,4 +216,4 @@ module_platform_driver(kempld_gpio_driver); MODULE_DESCRIPTION("KEM PLD GPIO Driver"); MODULE_AUTHOR("Michael Brunner <michael.brunner@kontron.com>"); MODULE_LICENSE("GPL"); -MODULE_ALIAS("platform:gpio-kempld"); +MODULE_ALIAS("platform:kempld-gpio"); diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index 9a82a9074a2..2bea89b7250 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -375,10 +375,8 @@ static int lp_gpio_probe(struct platform_device *pdev) int ret = -ENODEV; lg = devm_kzalloc(dev, sizeof(struct lp_gpio), GFP_KERNEL); - if (!lg) { - dev_err(dev, "can't allocate lp_gpio chip data\n"); + if (!lg) return -ENOMEM; - } lg->pdev = pdev; platform_set_drvdata(pdev, lg); diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c index 8672755f95c..0814584fcdc 100644 --- a/drivers/gpio/gpio-max730x.c +++ b/drivers/gpio/gpio-max730x.c @@ -237,10 +237,9 @@ int __max730x_remove(struct device *dev) ts->write(dev, 0x04, 0x00); ret = gpiochip_remove(&ts->chip); - if (!ret) { + if (!ret) mutex_destroy(&ts->lock); - kfree(ts); - } else + else dev_err(dev, "Failed to remove GPIO controller: %d\n", ret); return ret; diff --git a/drivers/gpio/gpio-mcp23s08.c b/drivers/gpio/gpio-mcp23s08.c index 3d53fd6880d..fe7c0e211f9 100644 --- a/drivers/gpio/gpio-mcp23s08.c +++ b/drivers/gpio/gpio-mcp23s08.c @@ -714,7 +714,7 @@ fail: #ifdef CONFIG_OF #ifdef CONFIG_SPI_MASTER -static struct of_device_id mcp23s08_spi_of_match[] = { +static const struct of_device_id mcp23s08_spi_of_match[] = { { .compatible = "microchip,mcp23s08", .data = (void *) MCP_TYPE_S08, @@ -738,7 +738,7 @@ MODULE_DEVICE_TABLE(of, mcp23s08_spi_of_match); #endif #if IS_ENABLED(CONFIG_I2C) -static struct of_device_id mcp23s08_i2c_of_match[] = { +static const struct of_device_id mcp23s08_i2c_of_match[] = { { .compatible = "microchip,mcp23008", .data = (void *) MCP_TYPE_008, @@ -867,7 +867,7 @@ static int mcp23s08_probe(struct spi_device *spi) { struct mcp23s08_platform_data *pdata; unsigned addr; - unsigned chips = 0; + int chips = 0; struct mcp23s08_driver_data *data; int status, type; unsigned base = -1, @@ -894,11 +894,14 @@ static int mcp23s08_probe(struct spi_device *spi) dev_err(&spi->dev, "invalid spi-present-mask\n"); return -ENODEV; } + for (addr = 0; addr < ARRAY_SIZE(pdata->chip); addr++) { - if ((spi_present_mask & (1 << addr))) - chips++; pullups[addr] = 0; + if (spi_present_mask & (1 << addr)) + chips++; } + if (!chips) + return -ENODEV; } else { type = spi_get_device_id(spi)->driver_data; pdata = dev_get_platdata(&spi->dev); @@ -937,6 +940,10 @@ static int mcp23s08_probe(struct spi_device *spi) if (!(spi_present_mask & (1 << addr))) continue; chips--; + if (chips < 0) { + dev_err(&spi->dev, "FATAL: invalid negative chip id\n"); + goto fail; + } data->mcp[addr] = &data->chip[chips]; status = mcp23s08_probe_one(data->mcp[addr], &spi->dev, spi, 0x40 | (addr << 1), type, base, diff --git a/drivers/gpio/gpio-moxart.c b/drivers/gpio/gpio-moxart.c index ccd45704e5f..4661e181be0 100644 --- a/drivers/gpio/gpio-moxart.c +++ b/drivers/gpio/gpio-moxart.c @@ -113,10 +113,8 @@ static int moxart_gpio_probe(struct platform_device *pdev) int ret; mgc = devm_kzalloc(dev, sizeof(*mgc), GFP_KERNEL); - if (!mgc) { - dev_err(dev, "can't allocate GPIO chip container\n"); + if (!mgc) return -ENOMEM; - } mgc->gpio = moxart_template_chip; res = platform_get_resource(pdev, IORESOURCE_MEM, 0); diff --git a/drivers/gpio/gpio-mvebu.c b/drivers/gpio/gpio-mvebu.c index d4250942239..418e3865036 100644 --- a/drivers/gpio/gpio-mvebu.c +++ b/drivers/gpio/gpio-mvebu.c @@ -535,7 +535,7 @@ static void mvebu_gpio_dbg_show(struct seq_file *s, struct gpio_chip *chip) #define mvebu_gpio_dbg_show NULL #endif -static struct of_device_id mvebu_gpio_of_match[] = { +static const struct of_device_id mvebu_gpio_of_match[] = { { .compatible = "marvell,orion-gpio", .data = (void *) MVEBU_GPIO_SOC_VARIANT_ORION, @@ -574,10 +574,8 @@ static int mvebu_gpio_probe(struct platform_device *pdev) soc_variant = MVEBU_GPIO_SOC_VARIANT_ORION; mvchip = devm_kzalloc(&pdev->dev, sizeof(struct mvebu_gpio_chip), GFP_KERNEL); - if (!mvchip) { - dev_err(&pdev->dev, "Cannot allocate memory\n"); + if (!mvchip) return -ENOMEM; - } if (of_property_read_u32(pdev->dev.of_node, "ngpios", &ngpios)) { dev_err(&pdev->dev, "Missing ngpios OF property\n"); @@ -738,9 +736,4 @@ static struct platform_driver mvebu_gpio_driver = { }, .probe = mvebu_gpio_probe, }; - -static int __init mvebu_gpio_init(void) -{ - return platform_driver_register(&mvebu_gpio_driver); -} -postcore_initcall(mvebu_gpio_init); +module_platform_driver(mvebu_gpio_driver); diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 19b886c21b1..00f29aa1fb9 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -24,9 +24,9 @@ #include <linux/pm.h> #include <linux/of.h> #include <linux/of_device.h> -#include <linux/irqdomain.h> #include <linux/irqchip/chained_irq.h> #include <linux/gpio.h> +#include <linux/bitops.h> #include <linux/platform_data/gpio-omap.h> #define OFF_MODE 1 @@ -52,7 +52,6 @@ struct gpio_bank { struct list_head node; void __iomem *base; u16 irq; - struct irq_domain *domain; u32 non_wakeup_gpios; u32 enabled_non_wakeup_gpios; struct gpio_regs context; @@ -84,22 +83,21 @@ struct gpio_bank { }; #define GPIO_INDEX(bank, gpio) (gpio % bank->width) -#define GPIO_BIT(bank, gpio) (1 << GPIO_INDEX(bank, gpio)) +#define GPIO_BIT(bank, gpio) (BIT(GPIO_INDEX(bank, gpio))) #define GPIO_MOD_CTRL_BIT BIT(0) #define BANK_USED(bank) (bank->mod_usage || bank->irq_usage) -#define LINE_USED(line, offset) (line & (1 << offset)) +#define LINE_USED(line, offset) (line & (BIT(offset))) static int irq_to_gpio(struct gpio_bank *bank, unsigned int gpio_irq) { return bank->chip.base + gpio_irq; } -static int omap_gpio_to_irq(struct gpio_chip *chip, unsigned offset) +static inline struct gpio_bank *_irq_data_get_bank(struct irq_data *d) { - struct gpio_bank *bank = container_of(chip, struct gpio_bank, chip); - - return irq_find_mapping(bank->domain, offset); + struct gpio_chip *chip = irq_data_get_irq_chip_data(d); + return container_of(chip, struct gpio_bank, chip); } static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input) @@ -110,9 +108,9 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input) reg += bank->regs->direction; l = readl_relaxed(reg); if (is_input) - l |= 1 << gpio; + l |= BIT(gpio); else - l &= ~(1 << gpio); + l &= ~(BIT(gpio)); writel_relaxed(l, reg); bank->context.oe = l; } @@ -155,14 +153,14 @@ static int _get_gpio_datain(struct gpio_bank *bank, int offset) { void __iomem *reg = bank->base + bank->regs->datain; - return (readl_relaxed(reg) & (1 << offset)) != 0; + return (readl_relaxed(reg) & (BIT(offset))) != 0; } static int _get_gpio_dataout(struct gpio_bank *bank, int offset) { void __iomem *reg = bank->base + bank->regs->dataout; - return (readl_relaxed(reg) & (1 << offset)) != 0; + return (readl_relaxed(reg) & (BIT(offset))) != 0; } static inline void _gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set) @@ -180,7 +178,7 @@ static inline void _gpio_rmw(void __iomem *base, u32 reg, u32 mask, bool set) static inline void _gpio_dbck_enable(struct gpio_bank *bank) { if (bank->dbck_enable_mask && !bank->dbck_enabled) { - clk_enable(bank->dbck); + clk_prepare_enable(bank->dbck); bank->dbck_enabled = true; writel_relaxed(bank->dbck_enable_mask, @@ -198,7 +196,7 @@ static inline void _gpio_dbck_disable(struct gpio_bank *bank) */ writel_relaxed(0, bank->base + bank->regs->debounce_en); - clk_disable(bank->dbck); + clk_disable_unprepare(bank->dbck); bank->dbck_enabled = false; } } @@ -231,7 +229,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, l = GPIO_BIT(bank, gpio); - clk_enable(bank->dbck); + clk_prepare_enable(bank->dbck); reg = bank->base + bank->regs->debounce; writel_relaxed(debounce, reg); @@ -245,7 +243,7 @@ static void _set_gpio_debounce(struct gpio_bank *bank, unsigned gpio, bank->dbck_enable_mask = val; writel_relaxed(val, reg); - clk_disable(bank->dbck); + clk_disable_unprepare(bank->dbck); /* * Enable debounce clock per module. * This call is mandatory because in omap_gpio_request() when @@ -290,7 +288,7 @@ static void _clear_gpio_debounce(struct gpio_bank *bank, unsigned gpio) bank->context.debounce = 0; writel_relaxed(bank->context.debounce, bank->base + bank->regs->debounce); - clk_disable(bank->dbck); + clk_disable_unprepare(bank->dbck); bank->dbck_enabled = false; } } @@ -299,7 +297,7 @@ static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio, unsigned trigger) { void __iomem *base = bank->base; - u32 gpio_bit = 1 << gpio; + u32 gpio_bit = BIT(gpio); _gpio_rmw(base, bank->regs->leveldetect0, gpio_bit, trigger & IRQ_TYPE_LEVEL_LOW); @@ -368,9 +366,9 @@ static void _toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) l = readl_relaxed(reg); if ((l >> gpio) & 1) - l &= ~(1 << gpio); + l &= ~(BIT(gpio)); else - l |= 1 << gpio; + l |= BIT(gpio); writel_relaxed(l, reg); } @@ -392,11 +390,11 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, l = readl_relaxed(reg); if ((trigger & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) - bank->toggle_mask |= 1 << gpio; + bank->toggle_mask |= BIT(gpio); if (trigger & IRQ_TYPE_EDGE_RISING) - l |= 1 << gpio; + l |= BIT(gpio); else if (trigger & IRQ_TYPE_EDGE_FALLING) - l &= ~(1 << gpio); + l &= ~(BIT(gpio)); else return -EINVAL; @@ -413,10 +411,10 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, if (trigger & IRQ_TYPE_EDGE_RISING) l |= 2 << (gpio << 1); if (trigger & IRQ_TYPE_EDGE_FALLING) - l |= 1 << (gpio << 1); + l |= BIT(gpio << 1); /* Enable wake-up during idle for dynamic tick */ - _gpio_rmw(base, bank->regs->wkup_en, 1 << gpio, trigger); + _gpio_rmw(base, bank->regs->wkup_en, BIT(gpio), trigger); bank->context.wake_en = readl_relaxed(bank->base + bank->regs->wkup_en); writel_relaxed(l, reg); @@ -430,7 +428,7 @@ static void _enable_gpio_module(struct gpio_bank *bank, unsigned offset) void __iomem *reg = bank->base + bank->regs->pinctrl; /* Claim the pin for MPU */ - writel_relaxed(readl_relaxed(reg) | (1 << offset), reg); + writel_relaxed(readl_relaxed(reg) | (BIT(offset)), reg); } if (bank->regs->ctrl && !BANK_USED(bank)) { @@ -453,7 +451,7 @@ static void _disable_gpio_module(struct gpio_bank *bank, unsigned offset) !LINE_USED(bank->mod_usage, offset) && !LINE_USED(bank->irq_usage, offset)) { /* Disable wake-up during idle for dynamic tick */ - _gpio_rmw(base, bank->regs->wkup_en, 1 << offset, 0); + _gpio_rmw(base, bank->regs->wkup_en, BIT(offset), 0); bank->context.wake_en = readl_relaxed(bank->base + bank->regs->wkup_en); } @@ -479,7 +477,7 @@ static int gpio_is_input(struct gpio_bank *bank, int mask) static int gpio_irq_type(struct irq_data *d, unsigned type) { - struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + struct gpio_bank *bank = _irq_data_get_bank(d); unsigned gpio = 0; int retval; unsigned long flags; @@ -509,20 +507,12 @@ static int gpio_irq_type(struct irq_data *d, unsigned type) if (!LINE_USED(bank->mod_usage, offset)) { _enable_gpio_module(bank, offset); _set_gpio_direction(bank, offset, 1); - } else if (!gpio_is_input(bank, 1 << offset)) { + } else if (!gpio_is_input(bank, BIT(offset))) { spin_unlock_irqrestore(&bank->lock, flags); return -EINVAL; } - retval = gpio_lock_as_irq(&bank->chip, offset); - if (retval) { - dev_err(bank->dev, "unable to lock offset %d for IRQ\n", - offset); - spin_unlock_irqrestore(&bank->lock, flags); - return retval; - } - - bank->irq_usage |= 1 << GPIO_INDEX(bank, gpio); + bank->irq_usage |= BIT(GPIO_INDEX(bank, gpio)); spin_unlock_irqrestore(&bank->lock, flags); if (type & (IRQ_TYPE_LEVEL_LOW | IRQ_TYPE_LEVEL_HIGH)) @@ -559,7 +549,7 @@ static u32 _get_gpio_irqbank_mask(struct gpio_bank *bank) { void __iomem *reg = bank->base; u32 l; - u32 mask = (1 << bank->width) - 1; + u32 mask = (BIT(bank->width)) - 1; reg += bank->regs->irqenable; l = readl_relaxed(reg); @@ -664,7 +654,7 @@ static void _reset_gpio(struct gpio_bank *bank, int gpio) /* Use disable_irq_wake() and enable_irq_wake() functions from drivers */ static int gpio_wake_enable(struct irq_data *d, unsigned int enable) { - struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + struct gpio_bank *bank = _irq_data_get_bank(d); unsigned int gpio = irq_to_gpio(bank, d->hwirq); return _set_gpio_wakeup(bank, gpio, enable); @@ -691,7 +681,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset) _set_gpio_triggering(bank, offset, IRQ_TYPE_NONE); _enable_gpio_module(bank, offset); } - bank->mod_usage |= 1 << offset; + bank->mod_usage |= BIT(offset); spin_unlock_irqrestore(&bank->lock, flags); return 0; @@ -703,7 +693,7 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset) unsigned long flags; spin_lock_irqsave(&bank->lock, flags); - bank->mod_usage &= ~(1 << offset); + bank->mod_usage &= ~(BIT(offset)); _disable_gpio_module(bank, offset); _reset_gpio(bank, bank->chip.base + offset); spin_unlock_irqrestore(&bank->lock, flags); @@ -732,11 +722,12 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) unsigned int bit; struct gpio_bank *bank; int unmasked = 0; - struct irq_chip *chip = irq_desc_get_chip(desc); + struct irq_chip *irqchip = irq_desc_get_chip(desc); + struct gpio_chip *chip = irq_get_handler_data(irq); - chained_irq_enter(chip, desc); + chained_irq_enter(irqchip, desc); - bank = irq_get_handler_data(irq); + bank = container_of(chip, struct gpio_bank, chip); isr_reg = bank->base + bank->regs->irqstatus; pm_runtime_get_sync(bank->dev); @@ -764,7 +755,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) configured, we could unmask GPIO bank interrupt immediately */ if (!level_mask && !unmasked) { unmasked = 1; - chained_irq_exit(chip, desc); + chained_irq_exit(irqchip, desc); } if (!isr) @@ -772,7 +763,7 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) while (isr) { bit = __ffs(isr); - isr &= ~(1 << bit); + isr &= ~(BIT(bit)); /* * Some chips can't respond to both rising and falling @@ -781,10 +772,11 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) * to respond to the IRQ for the opposite direction. * This will be indicated in the bank toggle_mask. */ - if (bank->toggle_mask & (1 << bit)) + if (bank->toggle_mask & (BIT(bit))) _toggle_gpio_edge_triggering(bank, bit); - generic_handle_irq(irq_find_mapping(bank->domain, bit)); + generic_handle_irq(irq_find_mapping(bank->chip.irqdomain, + bit)); } } /* if bank has any level sensitive GPIO pin interrupt @@ -793,20 +785,20 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc) interrupt */ exit: if (!unmasked) - chained_irq_exit(chip, desc); + chained_irq_exit(irqchip, desc); pm_runtime_put(bank->dev); } static void gpio_irq_shutdown(struct irq_data *d) { - struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + struct gpio_bank *bank = _irq_data_get_bank(d); unsigned int gpio = irq_to_gpio(bank, d->hwirq); unsigned long flags; unsigned offset = GPIO_INDEX(bank, gpio); spin_lock_irqsave(&bank->lock, flags); gpio_unlock_as_irq(&bank->chip, offset); - bank->irq_usage &= ~(1 << offset); + bank->irq_usage &= ~(BIT(offset)); _disable_gpio_module(bank, offset); _reset_gpio(bank, gpio); spin_unlock_irqrestore(&bank->lock, flags); @@ -821,7 +813,7 @@ static void gpio_irq_shutdown(struct irq_data *d) static void gpio_ack_irq(struct irq_data *d) { - struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + struct gpio_bank *bank = _irq_data_get_bank(d); unsigned int gpio = irq_to_gpio(bank, d->hwirq); _clear_gpio_irqstatus(bank, gpio); @@ -829,7 +821,7 @@ static void gpio_ack_irq(struct irq_data *d) static void gpio_mask_irq(struct irq_data *d) { - struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + struct gpio_bank *bank = _irq_data_get_bank(d); unsigned int gpio = irq_to_gpio(bank, d->hwirq); unsigned long flags; @@ -841,7 +833,7 @@ static void gpio_mask_irq(struct irq_data *d) static void gpio_unmask_irq(struct irq_data *d) { - struct gpio_bank *bank = irq_data_get_irq_chip_data(d); + struct gpio_bank *bank = _irq_data_get_bank(d); unsigned int gpio = irq_to_gpio(bank, d->hwirq); unsigned int irq_mask = GPIO_BIT(bank, gpio); u32 trigger = irqd_get_trigger_type(d); @@ -936,6 +928,21 @@ static inline void mpuio_init(struct gpio_bank *bank) /*---------------------------------------------------------------------*/ +static int gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank; + unsigned long flags; + void __iomem *reg; + int dir; + + bank = container_of(chip, struct gpio_bank, chip); + reg = bank->base + bank->regs->direction; + spin_lock_irqsave(&bank->lock, flags); + dir = !!(readl_relaxed(reg) & BIT(offset)); + spin_unlock_irqrestore(&bank->lock, flags); + return dir; +} + static int gpio_input(struct gpio_chip *chip, unsigned offset) { struct gpio_bank *bank; @@ -954,7 +961,7 @@ static int gpio_get(struct gpio_chip *chip, unsigned offset) u32 mask; bank = container_of(chip, struct gpio_bank, chip); - mask = (1 << offset); + mask = (BIT(offset)); if (gpio_is_input(bank, mask)) return _get_gpio_datain(bank, offset); @@ -1081,10 +1088,12 @@ omap_mpuio_alloc_gc(struct gpio_bank *bank, unsigned int irq_start, IRQ_NOREQUEST | IRQ_NOPROBE, 0); } -static void omap_gpio_chip_init(struct gpio_bank *bank) +static int omap_gpio_chip_init(struct gpio_bank *bank) { int j; static int gpio; + int irq_base = 0; + int ret; /* * REVISIT eventually switch from OMAP-specific gpio structs @@ -1092,12 +1101,12 @@ static void omap_gpio_chip_init(struct gpio_bank *bank) */ bank->chip.request = omap_gpio_request; bank->chip.free = omap_gpio_free; + bank->chip.get_direction = gpio_get_direction; bank->chip.direction_input = gpio_input; bank->chip.get = gpio_get; bank->chip.direction_output = gpio_output; bank->chip.set_debounce = gpio_debounce; bank->chip.set = gpio_set; - bank->chip.to_irq = omap_gpio_to_irq; if (bank->is_mpuio) { bank->chip.label = "mpuio"; if (bank->regs->wkup_en) @@ -1110,22 +1119,48 @@ static void omap_gpio_chip_init(struct gpio_bank *bank) } bank->chip.ngpio = bank->width; - gpiochip_add(&bank->chip); + ret = gpiochip_add(&bank->chip); + if (ret) { + dev_err(bank->dev, "Could not register gpio chip %d\n", ret); + return ret; + } + +#ifdef CONFIG_ARCH_OMAP1 + /* + * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop + * irq_alloc_descs() since a base IRQ offset will no longer be needed. + */ + irq_base = irq_alloc_descs(-1, 0, bank->width, 0); + if (irq_base < 0) { + dev_err(bank->dev, "Couldn't allocate IRQ numbers\n"); + return -ENODEV; + } +#endif + + ret = gpiochip_irqchip_add(&bank->chip, &gpio_irq_chip, + irq_base, gpio_irq_handler, + IRQ_TYPE_NONE); + + if (ret) { + dev_err(bank->dev, "Couldn't add irqchip to gpiochip %d\n", ret); + ret = gpiochip_remove(&bank->chip); + return -ENODEV; + } + + gpiochip_set_chained_irqchip(&bank->chip, &gpio_irq_chip, + bank->irq, gpio_irq_handler); for (j = 0; j < bank->width; j++) { - int irq = irq_create_mapping(bank->domain, j); + int irq = irq_find_mapping(bank->chip.irqdomain, j); irq_set_lockdep_class(irq, &gpio_lock_class); - irq_set_chip_data(irq, bank); if (bank->is_mpuio) { omap_mpuio_alloc_gc(bank, irq, bank->width); - } else { - irq_set_chip_and_handler(irq, &gpio_irq_chip, - handle_simple_irq); - set_irq_flags(irq, IRQF_VALID); + irq_set_chip_and_handler(irq, NULL, NULL); + set_irq_flags(irq, 0); } } - irq_set_chained_handler(bank->irq, gpio_irq_handler); - irq_set_handler_data(bank->irq, bank); + + return 0; } static const struct of_device_id omap_gpio_match[]; @@ -1138,9 +1173,7 @@ static int omap_gpio_probe(struct platform_device *pdev) const struct omap_gpio_platform_data *pdata; struct resource *res; struct gpio_bank *bank; -#ifdef CONFIG_ARCH_OMAP1 - int irq_base; -#endif + int ret; match = of_match_device(of_match_ptr(omap_gpio_match), dev); @@ -1162,6 +1195,7 @@ static int omap_gpio_probe(struct platform_device *pdev) bank->irq = res->start; bank->dev = dev; + bank->chip.dev = dev; bank->dbck_flag = pdata->dbck_flag; bank->stride = pdata->bank_stride; bank->width = pdata->bank_width; @@ -1182,29 +1216,6 @@ static int omap_gpio_probe(struct platform_device *pdev) pdata->get_context_loss_count; } -#ifdef CONFIG_ARCH_OMAP1 - /* - * REVISIT: Once we have OMAP1 supporting SPARSE_IRQ, we can drop - * irq_alloc_descs() and irq_domain_add_legacy() and just use a - * linear IRQ domain mapping for all OMAP platforms. - */ - irq_base = irq_alloc_descs(-1, 0, bank->width, 0); - if (irq_base < 0) { - dev_err(dev, "Couldn't allocate IRQ numbers\n"); - return -ENODEV; - } - - bank->domain = irq_domain_add_legacy(node, bank->width, irq_base, - 0, &irq_domain_simple_ops, NULL); -#else - bank->domain = irq_domain_add_linear(node, bank->width, - &irq_domain_simple_ops, NULL); -#endif - if (!bank->domain) { - dev_err(dev, "Couldn't register an IRQ domain\n"); - return -ENODEV; - } - if (bank->regs->set_dataout && bank->regs->clr_dataout) bank->set_dataout = _set_gpio_dataout_reg; else @@ -1216,7 +1227,7 @@ static int omap_gpio_probe(struct platform_device *pdev) res = platform_get_resource(pdev, IORESOURCE_MEM, 0); bank->base = devm_ioremap_resource(dev, res); if (IS_ERR(bank->base)) { - irq_domain_remove(bank->domain); + irq_domain_remove(bank->chip.irqdomain); return PTR_ERR(bank->base); } @@ -1230,7 +1241,11 @@ static int omap_gpio_probe(struct platform_device *pdev) mpuio_init(bank); omap_gpio_mod_init(bank); - omap_gpio_chip_init(bank); + + ret = omap_gpio_chip_init(bank); + if (ret) + return ret; + omap_gpio_show_rev(bank); pm_runtime_put(bank->dev); diff --git a/drivers/gpio/gpio-palmas.c b/drivers/gpio/gpio-palmas.c index da9d33252e5..86bdbe36206 100644 --- a/drivers/gpio/gpio-palmas.c +++ b/drivers/gpio/gpio-palmas.c @@ -148,7 +148,7 @@ static const struct palmas_device_data tps80036_dev_data = { .ngpio = 16, }; -static struct of_device_id of_palmas_gpio_match[] = { +static const struct of_device_id of_palmas_gpio_match[] = { { .compatible = "ti,palmas-gpio", .data = &palmas_dev_data,}, { .compatible = "ti,tps65913-gpio", .data = &palmas_dev_data,}, { .compatible = "ti,tps65914-gpio", .data = &palmas_dev_data,}, @@ -173,10 +173,8 @@ static int palmas_gpio_probe(struct platform_device *pdev) palmas_gpio = devm_kzalloc(&pdev->dev, sizeof(*palmas_gpio), GFP_KERNEL); - if (!palmas_gpio) { - dev_err(&pdev->dev, "Could not allocate palmas_gpio\n"); + if (!palmas_gpio) return -ENOMEM; - } palmas_gpio->palmas = palmas; palmas_gpio->gpio_chip.owner = THIS_MODULE; diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index d550d8e5870..e721a37c347 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -15,8 +15,6 @@ #include <linux/init.h> #include <linux/gpio.h> #include <linux/interrupt.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> #include <linux/i2c.h> #include <linux/platform_data/pca953x.h> #include <linux/slab.h> @@ -91,7 +89,6 @@ struct pca953x_chip { u8 irq_stat[MAX_BANK]; u8 irq_trig_raise[MAX_BANK]; u8 irq_trig_fall[MAX_BANK]; - struct irq_domain *domain; #endif struct i2c_client *client; @@ -100,6 +97,11 @@ struct pca953x_chip { int chip_type; }; +static inline struct pca953x_chip *to_pca(struct gpio_chip *gc) +{ + return container_of(gc, struct pca953x_chip, gpio_chip); +} + static int pca953x_read_single(struct pca953x_chip *chip, int reg, u32 *val, int off) { @@ -202,12 +204,10 @@ static int pca953x_read_regs(struct pca953x_chip *chip, int reg, u8 *val) static int pca953x_gpio_direction_input(struct gpio_chip *gc, unsigned off) { - struct pca953x_chip *chip; + struct pca953x_chip *chip = to_pca(gc); u8 reg_val; int ret, offset = 0; - chip = container_of(gc, struct pca953x_chip, gpio_chip); - mutex_lock(&chip->i2c_lock); reg_val = chip->reg_direction[off / BANK_SZ] | (1u << (off % BANK_SZ)); @@ -233,12 +233,10 @@ exit: static int pca953x_gpio_direction_output(struct gpio_chip *gc, unsigned off, int val) { - struct pca953x_chip *chip; + struct pca953x_chip *chip = to_pca(gc); u8 reg_val; int ret, offset = 0; - chip = container_of(gc, struct pca953x_chip, gpio_chip); - mutex_lock(&chip->i2c_lock); /* set output level */ if (val) @@ -285,12 +283,10 @@ exit: static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) { - struct pca953x_chip *chip; + struct pca953x_chip *chip = to_pca(gc); u32 reg_val; int ret, offset = 0; - chip = container_of(gc, struct pca953x_chip, gpio_chip); - mutex_lock(&chip->i2c_lock); switch (chip->chip_type) { case PCA953X_TYPE: @@ -315,12 +311,10 @@ static int pca953x_gpio_get_value(struct gpio_chip *gc, unsigned off) static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val) { - struct pca953x_chip *chip; + struct pca953x_chip *chip = to_pca(gc); u8 reg_val; int ret, offset = 0; - chip = container_of(gc, struct pca953x_chip, gpio_chip); - mutex_lock(&chip->i2c_lock); if (val) reg_val = chip->reg_output[off / BANK_SZ] @@ -367,38 +361,34 @@ static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios) } #ifdef CONFIG_GPIO_PCA953X_IRQ -static int pca953x_gpio_to_irq(struct gpio_chip *gc, unsigned off) -{ - struct pca953x_chip *chip; - - chip = container_of(gc, struct pca953x_chip, gpio_chip); - return irq_create_mapping(chip->domain, off); -} - static void pca953x_irq_mask(struct irq_data *d) { - struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct pca953x_chip *chip = to_pca(gc); chip->irq_mask[d->hwirq / BANK_SZ] &= ~(1 << (d->hwirq % BANK_SZ)); } static void pca953x_irq_unmask(struct irq_data *d) { - struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct pca953x_chip *chip = to_pca(gc); chip->irq_mask[d->hwirq / BANK_SZ] |= 1 << (d->hwirq % BANK_SZ); } static void pca953x_irq_bus_lock(struct irq_data *d) { - struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct pca953x_chip *chip = to_pca(gc); mutex_lock(&chip->irq_lock); } static void pca953x_irq_bus_sync_unlock(struct irq_data *d) { - struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct pca953x_chip *chip = to_pca(gc); u8 new_irqs; int level, i; @@ -420,7 +410,8 @@ static void pca953x_irq_bus_sync_unlock(struct irq_data *d) static int pca953x_irq_set_type(struct irq_data *d, unsigned int type) { - struct pca953x_chip *chip = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct pca953x_chip *chip = to_pca(gc); int bank_nb = d->hwirq / BANK_SZ; u8 mask = 1 << (d->hwirq % BANK_SZ); @@ -503,44 +494,25 @@ static irqreturn_t pca953x_irq_handler(int irq, void *devid) struct pca953x_chip *chip = devid; u8 pending[MAX_BANK]; u8 level; + unsigned nhandled = 0; int i; if (!pca953x_irq_pending(chip, pending)) - return IRQ_HANDLED; + return IRQ_NONE; for (i = 0; i < NBANK(chip); i++) { while (pending[i]) { level = __ffs(pending[i]); - handle_nested_irq(irq_find_mapping(chip->domain, + handle_nested_irq(irq_find_mapping(chip->gpio_chip.irqdomain, level + (BANK_SZ * i))); pending[i] &= ~(1 << level); + nhandled++; } } - return IRQ_HANDLED; + return (nhandled > 0) ? IRQ_HANDLED : IRQ_NONE; } -static int pca953x_gpio_irq_map(struct irq_domain *d, unsigned int irq, - irq_hw_number_t hwirq) -{ - irq_clear_status_flags(irq, IRQ_NOREQUEST); - irq_set_chip_data(irq, d->host_data); - irq_set_chip(irq, &pca953x_irq_chip); - irq_set_nested_thread(irq, true); -#ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); -#else - irq_set_noprobe(irq); -#endif - - return 0; -} - -static const struct irq_domain_ops pca953x_irq_simple_ops = { - .map = pca953x_gpio_irq_map, - .xlate = irq_domain_xlate_twocell, -}; - static int pca953x_irq_setup(struct pca953x_chip *chip, const struct i2c_device_id *id, int irq_base) @@ -572,19 +544,12 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, chip->irq_stat[i] &= chip->reg_direction[i]; mutex_init(&chip->irq_lock); - chip->domain = irq_domain_add_simple(client->dev.of_node, - chip->gpio_chip.ngpio, - irq_base, - &pca953x_irq_simple_ops, - chip); - if (!chip->domain) - return -ENODEV; - ret = devm_request_threaded_irq(&client->dev, client->irq, NULL, pca953x_irq_handler, - IRQF_TRIGGER_LOW | IRQF_ONESHOT, + IRQF_TRIGGER_LOW | IRQF_ONESHOT | + IRQF_SHARED, dev_name(&client->dev), chip); if (ret) { dev_err(&client->dev, "failed to request irq %d\n", @@ -592,7 +557,16 @@ static int pca953x_irq_setup(struct pca953x_chip *chip, return ret; } - chip->gpio_chip.to_irq = pca953x_gpio_to_irq; + ret = gpiochip_irqchip_add(&chip->gpio_chip, + &pca953x_irq_chip, + irq_base, + handle_simple_irq, + IRQ_TYPE_NONE); + if (ret) { + dev_err(&client->dev, + "could not connect irqchip to gpiochip\n"); + return ret; + } } return 0; @@ -756,11 +730,11 @@ static int pca953x_probe(struct i2c_client *client, if (ret) return ret; - ret = pca953x_irq_setup(chip, id, irq_base); + ret = gpiochip_add(&chip->gpio_chip); if (ret) return ret; - ret = gpiochip_add(&chip->gpio_chip); + ret = pca953x_irq_setup(chip, id, irq_base); if (ret) return ret; diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c index 82735822bc9..27b46751ea7 100644 --- a/drivers/gpio/gpio-pcf857x.c +++ b/drivers/gpio/gpio-pcf857x.c @@ -262,7 +262,7 @@ static int pcf857x_irq_domain_init(struct pcf857x *gpio, /* enable real irq */ status = devm_request_threaded_irq(&client->dev, client->irq, NULL, pcf857x_irq, IRQF_ONESHOT | - IRQF_TRIGGER_FALLING, + IRQF_TRIGGER_FALLING | IRQF_SHARED, dev_name(&client->dev), gpio); if (status) @@ -319,7 +319,7 @@ static int pcf857x_probe(struct i2c_client *client, status = pcf857x_irq_domain_init(gpio, client); if (status < 0) { dev_err(&client->dev, "irq_domain init failed\n"); - goto fail; + goto fail_irq_domain; } } @@ -414,12 +414,13 @@ static int pcf857x_probe(struct i2c_client *client, return 0; fail: - dev_dbg(&client->dev, "probe error %d for '%s'\n", - status, client->name); - if (client->irq) pcf857x_irq_domain_cleanup(gpio); +fail_irq_domain: + dev_dbg(&client->dev, "probe error %d for '%s'\n", + status, client->name); + return status; } diff --git a/drivers/gpio/gpio-pch.c b/drivers/gpio/gpio-pch.c index 83a15639747..d6eac9b17db 100644 --- a/drivers/gpio/gpio-pch.c +++ b/drivers/gpio/gpio-pch.c @@ -20,6 +20,7 @@ #include <linux/gpio.h> #include <linux/interrupt.h> #include <linux/irq.h> +#include <linux/slab.h> #define PCH_EDGE_FALLING 0 #define PCH_EDGE_RISING BIT(0) diff --git a/drivers/gpio/gpio-pl061.c b/drivers/gpio/gpio-pl061.c index b0f475243ce..84b49cfb81a 100644 --- a/drivers/gpio/gpio-pl061.c +++ b/drivers/gpio/gpio-pl061.c @@ -17,7 +17,6 @@ #include <linux/irq.h> #include <linux/irqchip/chained_irq.h> #include <linux/bitops.h> -#include <linux/workqueue.h> #include <linux/gpio.h> #include <linux/device.h> #include <linux/amba/bus.h> @@ -88,7 +87,7 @@ static int pl061_direction_input(struct gpio_chip *gc, unsigned offset) spin_lock_irqsave(&chip->lock, flags); gpiodir = readb(chip->base + GPIODIR); - gpiodir &= ~(1 << offset); + gpiodir &= ~(BIT(offset)); writeb(gpiodir, chip->base + GPIODIR); spin_unlock_irqrestore(&chip->lock, flags); @@ -106,16 +105,16 @@ static int pl061_direction_output(struct gpio_chip *gc, unsigned offset, return -EINVAL; spin_lock_irqsave(&chip->lock, flags); - writeb(!!value << offset, chip->base + (1 << (offset + 2))); + writeb(!!value << offset, chip->base + (BIT(offset + 2))); gpiodir = readb(chip->base + GPIODIR); - gpiodir |= 1 << offset; + gpiodir |= BIT(offset); writeb(gpiodir, chip->base + GPIODIR); /* * gpio value is set again, because pl061 doesn't allow to set value of * a gpio pin before configuring it in OUT mode. */ - writeb(!!value << offset, chip->base + (1 << (offset + 2))); + writeb(!!value << offset, chip->base + (BIT(offset + 2))); spin_unlock_irqrestore(&chip->lock, flags); return 0; @@ -125,14 +124,14 @@ static int pl061_get_value(struct gpio_chip *gc, unsigned offset) { struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - return !!readb(chip->base + (1 << (offset + 2))); + return !!readb(chip->base + (BIT(offset + 2))); } static void pl061_set_value(struct gpio_chip *gc, unsigned offset, int value) { struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - writeb(!!value << offset, chip->base + (1 << (offset + 2))); + writeb(!!value << offset, chip->base + (BIT(offset + 2))); } static int pl061_irq_type(struct irq_data *d, unsigned trigger) @@ -207,7 +206,7 @@ static void pl061_irq_mask(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - u8 mask = 1 << (irqd_to_hwirq(d) % PL061_GPIO_NR); + u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR); u8 gpioie; spin_lock(&chip->lock); @@ -220,7 +219,7 @@ static void pl061_irq_unmask(struct irq_data *d) { struct gpio_chip *gc = irq_data_get_irq_chip_data(d); struct pl061_gpio *chip = container_of(gc, struct pl061_gpio, gc); - u8 mask = 1 << (irqd_to_hwirq(d) % PL061_GPIO_NR); + u8 mask = BIT(irqd_to_hwirq(d) % PL061_GPIO_NR); u8 gpioie; spin_lock(&chip->lock); @@ -302,9 +301,9 @@ static int pl061_probe(struct amba_device *adev, const struct amba_id *id) for (i = 0; i < PL061_GPIO_NR; i++) { if (pdata) { - if (pdata->directions & (1 << i)) + if (pdata->directions & (BIT(i))) pl061_direction_output(&chip->gc, i, - pdata->values & (1 << i)); + pdata->values & (BIT(i))); else pl061_direction_input(&chip->gc, i); } @@ -331,7 +330,7 @@ static int pl061_suspend(struct device *dev) chip->csave_regs.gpio_ie = readb(chip->base + GPIOIE); for (offset = 0; offset < PL061_GPIO_NR; offset++) { - if (chip->csave_regs.gpio_dir & (1 << offset)) + if (chip->csave_regs.gpio_dir & (BIT(offset))) chip->csave_regs.gpio_data |= pl061_get_value(&chip->gc, offset) << offset; } @@ -345,10 +344,10 @@ static int pl061_resume(struct device *dev) int offset; for (offset = 0; offset < PL061_GPIO_NR; offset++) { - if (chip->csave_regs.gpio_dir & (1 << offset)) + if (chip->csave_regs.gpio_dir & (BIT(offset))) pl061_direction_output(&chip->gc, offset, chip->csave_regs.gpio_data & - (1 << offset)); + (BIT(offset))); else pl061_direction_input(&chip->gc, offset); } diff --git a/drivers/gpio/gpio-rc5t583.c b/drivers/gpio/gpio-rc5t583.c index 9b423173ab5..562b0c4d9cc 100644 --- a/drivers/gpio/gpio-rc5t583.c +++ b/drivers/gpio/gpio-rc5t583.c @@ -119,10 +119,8 @@ static int rc5t583_gpio_probe(struct platform_device *pdev) rc5t583_gpio = devm_kzalloc(&pdev->dev, sizeof(*rc5t583_gpio), GFP_KERNEL); - if (!rc5t583_gpio) { - dev_warn(&pdev->dev, "Mem allocation for rc5t583_gpio failed"); + if (!rc5t583_gpio) return -ENOMEM; - } rc5t583_gpio->gpio_chip.label = "gpio-rc5t583", rc5t583_gpio->gpio_chip.owner = THIS_MODULE, diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c index 03c91482432..0c9f803fc1a 100644 --- a/drivers/gpio/gpio-rcar.c +++ b/drivers/gpio/gpio-rcar.c @@ -26,6 +26,7 @@ #include <linux/pinctrl/consumer.h> #include <linux/platform_data/gpio-rcar.h> #include <linux/platform_device.h> +#include <linux/pm_runtime.h> #include <linux/spinlock.h> #include <linux/slab.h> @@ -362,7 +363,6 @@ static int gpio_rcar_probe(struct platform_device *pdev) p = devm_kzalloc(dev, sizeof(*p), GFP_KERNEL); if (!p) { - dev_err(dev, "failed to allocate driver data\n"); ret = -ENOMEM; goto err0; } @@ -377,6 +377,9 @@ static int gpio_rcar_probe(struct platform_device *pdev) platform_set_drvdata(pdev, p); + pm_runtime_enable(dev); + pm_runtime_get_sync(dev); + io = platform_get_resource(pdev, IORESOURCE_MEM, 0); irq = platform_get_resource(pdev, IORESOURCE_IRQ, 0); @@ -460,6 +463,8 @@ static int gpio_rcar_probe(struct platform_device *pdev) err1: irq_domain_remove(p->irq_domain); err0: + pm_runtime_put(dev); + pm_runtime_disable(dev); return ret; } @@ -473,6 +478,8 @@ static int gpio_rcar_remove(struct platform_device *pdev) return ret; irq_domain_remove(p->irq_domain); + pm_runtime_put(&pdev->dev); + pm_runtime_disable(&pdev->dev); return 0; } diff --git a/drivers/gpio/gpio-rdc321x.c b/drivers/gpio/gpio-rdc321x.c index 88577c3272a..9fa7e53331c 100644 --- a/drivers/gpio/gpio-rdc321x.c +++ b/drivers/gpio/gpio-rdc321x.c @@ -141,17 +141,15 @@ static int rdc321x_gpio_probe(struct platform_device *pdev) return -ENODEV; } - rdc321x_gpio_dev = kzalloc(sizeof(struct rdc321x_gpio), GFP_KERNEL); - if (!rdc321x_gpio_dev) { - dev_err(&pdev->dev, "failed to allocate private data\n"); + rdc321x_gpio_dev = devm_kzalloc(&pdev->dev, sizeof(struct rdc321x_gpio), + GFP_KERNEL); + if (!rdc321x_gpio_dev) return -ENOMEM; - } r = platform_get_resource_byname(pdev, IORESOURCE_IO, "gpio-reg1"); if (!r) { dev_err(&pdev->dev, "failed to get gpio-reg1 resource\n"); - err = -ENODEV; - goto out_free; + return -ENODEV; } spin_lock_init(&rdc321x_gpio_dev->lock); @@ -162,8 +160,7 @@ static int rdc321x_gpio_probe(struct platform_device *pdev) r = platform_get_resource_byname(pdev, IORESOURCE_IO, "gpio-reg2"); if (!r) { dev_err(&pdev->dev, "failed to get gpio-reg2 resource\n"); - err = -ENODEV; - goto out_free; + return -ENODEV; } rdc321x_gpio_dev->reg2_ctrl_base = r->start; @@ -187,21 +184,17 @@ static int rdc321x_gpio_probe(struct platform_device *pdev) rdc321x_gpio_dev->reg1_data_base, &rdc321x_gpio_dev->data_reg[0]); if (err) - goto out_free; + return err; err = pci_read_config_dword(rdc321x_gpio_dev->sb_pdev, rdc321x_gpio_dev->reg2_data_base, &rdc321x_gpio_dev->data_reg[1]); if (err) - goto out_free; + return err; dev_info(&pdev->dev, "registering %d GPIOs\n", rdc321x_gpio_dev->chip.ngpio); return gpiochip_add(&rdc321x_gpio_dev->chip); - -out_free: - kfree(rdc321x_gpio_dev); - return err; } static int rdc321x_gpio_remove(struct platform_device *pdev) @@ -213,8 +206,6 @@ static int rdc321x_gpio_remove(struct platform_device *pdev) if (ret) dev_err(&pdev->dev, "failed to unregister chip\n"); - kfree(rdc321x_gpio_dev); - return ret; } diff --git a/drivers/gpio/gpio-sch.c b/drivers/gpio/gpio-sch.c index 5af65719b95..a9b1cd16c84 100644 --- a/drivers/gpio/gpio-sch.c +++ b/drivers/gpio/gpio-sch.c @@ -97,8 +97,6 @@ static int sch_gpio_core_direction_out(struct gpio_chip *gc, u8 curr_dirs; unsigned short offset, bit; - sch_gpio_core_set(gc, gpio_num, val); - spin_lock(&gpio_lock); offset = CGIO + gpio_num / 8; @@ -109,6 +107,17 @@ static int sch_gpio_core_direction_out(struct gpio_chip *gc, outb(curr_dirs & ~(1 << bit), gpio_ba + offset); spin_unlock(&gpio_lock); + + /* + * according to the datasheet, writing to the level register has no + * effect when GPIO is programmed as input. + * Actually the the level register is read-only when configured as input. + * Thus presetting the output level before switching to output is _NOT_ possible. + * Hence we set the level after configuring the GPIO as output. + * But we cannot prevent a short low pulse if direction is set to high + * and an external pull-up is connected. + */ + sch_gpio_core_set(gc, gpio_num, val); return 0; } @@ -178,8 +187,6 @@ static int sch_gpio_resume_direction_out(struct gpio_chip *gc, u8 curr_dirs; unsigned short offset, bit; - sch_gpio_resume_set(gc, gpio_num, val); - offset = RGIO + gpio_num / 8; bit = gpio_num % 8; @@ -190,6 +197,17 @@ static int sch_gpio_resume_direction_out(struct gpio_chip *gc, outb(curr_dirs & ~(1 << bit), gpio_ba + offset); spin_unlock(&gpio_lock); + + /* + * according to the datasheet, writing to the level register has no + * effect when GPIO is programmed as input. + * Actually the the level register is read-only when configured as input. + * Thus presetting the output level before switching to output is _NOT_ possible. + * Hence we set the level after configuring the GPIO as output. + * But we cannot prevent a short low pulse if direction is set to high + * and an external pull-up is connected. + */ + sch_gpio_resume_set(gc, gpio_num, val); return 0; } diff --git a/drivers/gpio/gpio-sch311x.c b/drivers/gpio/gpio-sch311x.c index 0357387b364..f942b80ee40 100644 --- a/drivers/gpio/gpio-sch311x.c +++ b/drivers/gpio/gpio-sch311x.c @@ -327,14 +327,22 @@ static int __init sch311x_detect(int sio_config_port, unsigned short *addr) if (err) return err; - /* Check device ID. We currently know about: - * SCH3112 (0x7c), SCH3114 (0x7d), and SCH3116 (0x7f). */ + /* Check device ID. */ reg = sch311x_sio_inb(sio_config_port, 0x20); - if (!(reg == 0x7c || reg == 0x7d || reg == 0x7f)) { + switch (reg) { + case 0x7c: /* SCH3112 */ + dev_id = 2; + break; + case 0x7d: /* SCH3114 */ + dev_id = 4; + break; + case 0x7f: /* SCH3116 */ + dev_id = 6; + break; + default: err = -ENODEV; goto exit; } - dev_id = reg == 0x7c ? 2 : reg == 0x7d ? 4 : 6; /* Select logical device A (runtime registers) */ sch311x_sio_outb(sio_config_port, 0x07, 0x0a); diff --git a/drivers/gpio/gpio-spear-spics.c b/drivers/gpio/gpio-spear-spics.c index 30bcc539425..353263c85d2 100644 --- a/drivers/gpio/gpio-spear-spics.c +++ b/drivers/gpio/gpio-spear-spics.c @@ -129,10 +129,8 @@ static int spics_gpio_probe(struct platform_device *pdev) int ret; spics = devm_kzalloc(&pdev->dev, sizeof(*spics), GFP_KERNEL); - if (!spics) { - dev_err(&pdev->dev, "memory allocation fail\n"); + if (!spics) return -ENOMEM; - } res = platform_get_resource(pdev, IORESOURCE_MEM, 0); spics->base = devm_ioremap_resource(&pdev->dev, res); diff --git a/drivers/gpio/gpio-sx150x.c b/drivers/gpio/gpio-sx150x.c index 13d73fb2b5e..b51ca9f5c14 100644 --- a/drivers/gpio/gpio-sx150x.c +++ b/drivers/gpio/gpio-sx150x.c @@ -22,7 +22,6 @@ #include <linux/module.h> #include <linux/mutex.h> #include <linux/slab.h> -#include <linux/workqueue.h> #include <linux/i2c/sx150x.h> #define NO_UPDATE_PENDING -1 diff --git a/drivers/gpio/gpio-tc3589x.c b/drivers/gpio/gpio-tc3589x.c index 1019320984d..51f7cbd9ff7 100644 --- a/drivers/gpio/gpio-tc3589x.c +++ b/drivers/gpio/gpio-tc3589x.c @@ -12,8 +12,6 @@ #include <linux/slab.h> #include <linux/gpio.h> #include <linux/of.h> -#include <linux/irq.h> -#include <linux/irqdomain.h> #include <linux/interrupt.h> #include <linux/mfd/tc3589x.h> @@ -31,10 +29,6 @@ struct tc3589x_gpio { struct tc3589x *tc3589x; struct device *dev; struct mutex irq_lock; - struct irq_domain *domain; - - int irq_base; - /* Caches of interrupt control registers for bus_lock */ u8 regs[CACHE_NR_REGS][CACHE_NR_BANKS]; u8 oldregs[CACHE_NR_REGS][CACHE_NR_BANKS]; @@ -95,30 +89,6 @@ static int tc3589x_gpio_direction_input(struct gpio_chip *chip, return tc3589x_set_bits(tc3589x, reg, 1 << pos, 0); } -/** - * tc3589x_gpio_irq_get_irq(): Map a hardware IRQ on a chip to a Linux IRQ - * - * @tc3589x_gpio: tc3589x_gpio_irq controller to operate on. - * @irq: index of the hardware interrupt requested in the chip IRQs - * - * Useful for drivers to request their own IRQs. - */ -static int tc3589x_gpio_irq_get_irq(struct tc3589x_gpio *tc3589x_gpio, - int hwirq) -{ - if (!tc3589x_gpio) - return -EINVAL; - - return irq_create_mapping(tc3589x_gpio->domain, hwirq); -} - -static int tc3589x_gpio_to_irq(struct gpio_chip *chip, unsigned offset) -{ - struct tc3589x_gpio *tc3589x_gpio = to_tc3589x_gpio(chip); - - return tc3589x_gpio_irq_get_irq(tc3589x_gpio, offset); -} - static struct gpio_chip template_chip = { .label = "tc3589x", .owner = THIS_MODULE, @@ -126,13 +96,13 @@ static struct gpio_chip template_chip = { .get = tc3589x_gpio_get, .direction_output = tc3589x_gpio_direction_output, .set = tc3589x_gpio_set, - .to_irq = tc3589x_gpio_to_irq, .can_sleep = true, }; static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type) { - struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -159,14 +129,16 @@ static int tc3589x_gpio_irq_set_type(struct irq_data *d, unsigned int type) static void tc3589x_gpio_irq_lock(struct irq_data *d) { - struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); mutex_lock(&tc3589x_gpio->irq_lock); } static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d) { - struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; static const u8 regmap[] = { [REG_IBE] = TC3589x_GPIOIBE0, @@ -194,7 +166,8 @@ static void tc3589x_gpio_irq_sync_unlock(struct irq_data *d) static void tc3589x_gpio_irq_mask(struct irq_data *d) { - struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -204,7 +177,8 @@ static void tc3589x_gpio_irq_mask(struct irq_data *d) static void tc3589x_gpio_irq_unmask(struct irq_data *d) { - struct tc3589x_gpio *tc3589x_gpio = irq_data_get_irq_chip_data(d); + struct gpio_chip *gc = irq_data_get_irq_chip_data(d); + struct tc3589x_gpio *tc3589x_gpio = container_of(gc, struct tc3589x_gpio, chip); int offset = d->hwirq; int regoffset = offset / 8; int mask = 1 << (offset % 8); @@ -242,7 +216,8 @@ static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) while (stat) { int bit = __ffs(stat); int line = i * 8 + bit; - int irq = tc3589x_gpio_irq_get_irq(tc3589x_gpio, line); + int irq = irq_find_mapping(tc3589x_gpio->chip.irqdomain, + line); handle_nested_irq(irq); stat &= ~(1 << bit); @@ -254,61 +229,6 @@ static irqreturn_t tc3589x_gpio_irq(int irq, void *dev) return IRQ_HANDLED; } -static int tc3589x_gpio_irq_map(struct irq_domain *d, unsigned int irq, - irq_hw_number_t hwirq) -{ - struct tc3589x *tc3589x_gpio = d->host_data; - - irq_set_chip_data(irq, tc3589x_gpio); - irq_set_chip_and_handler(irq, &tc3589x_gpio_irq_chip, - handle_simple_irq); - irq_set_nested_thread(irq, 1); -#ifdef CONFIG_ARM - set_irq_flags(irq, IRQF_VALID); -#else - irq_set_noprobe(irq); -#endif - - return 0; -} - -static void tc3589x_gpio_irq_unmap(struct irq_domain *d, unsigned int irq) -{ -#ifdef CONFIG_ARM - set_irq_flags(irq, 0); -#endif - irq_set_chip_and_handler(irq, NULL, NULL); - irq_set_chip_data(irq, NULL); -} - -static struct irq_domain_ops tc3589x_irq_ops = { - .map = tc3589x_gpio_irq_map, - .unmap = tc3589x_gpio_irq_unmap, - .xlate = irq_domain_xlate_twocell, -}; - -static int tc3589x_gpio_irq_init(struct tc3589x_gpio *tc3589x_gpio, - struct device_node *np) -{ - int base = tc3589x_gpio->irq_base; - - /* - * If this results in a linear domain, irq_create_mapping() will - * take care of allocating IRQ descriptors at runtime. When a base - * is provided, the IRQ descriptors will be allocated when the - * domain is instantiated. - */ - tc3589x_gpio->domain = irq_domain_add_simple(np, - tc3589x_gpio->chip.ngpio, base, &tc3589x_irq_ops, - tc3589x_gpio); - if (!tc3589x_gpio->domain) { - dev_err(tc3589x_gpio->dev, "Failed to create irqdomain\n"); - return -ENOSYS; - } - - return 0; -} - static int tc3589x_gpio_probe(struct platform_device *pdev) { struct tc3589x *tc3589x = dev_get_drvdata(pdev->dev.parent); @@ -329,7 +249,8 @@ static int tc3589x_gpio_probe(struct platform_device *pdev) if (irq < 0) return irq; - tc3589x_gpio = kzalloc(sizeof(struct tc3589x_gpio), GFP_KERNEL); + tc3589x_gpio = devm_kzalloc(&pdev->dev, sizeof(struct tc3589x_gpio), + GFP_KERNEL); if (!tc3589x_gpio) return -ENOMEM; @@ -347,30 +268,36 @@ static int tc3589x_gpio_probe(struct platform_device *pdev) tc3589x_gpio->chip.of_node = np; #endif - tc3589x_gpio->irq_base = tc3589x->irq_base ? - tc3589x->irq_base + TC3589x_INT_GPIO(0) : 0; - /* Bring the GPIO module out of reset */ ret = tc3589x_set_bits(tc3589x, TC3589x_RSTCTRL, TC3589x_RSTCTRL_GPIRST, 0); if (ret < 0) - goto out_free; - - ret = tc3589x_gpio_irq_init(tc3589x_gpio, np); - if (ret) - goto out_free; + return ret; - ret = request_threaded_irq(irq, NULL, tc3589x_gpio_irq, IRQF_ONESHOT, - "tc3589x-gpio", tc3589x_gpio); + ret = devm_request_threaded_irq(&pdev->dev, + irq, NULL, tc3589x_gpio_irq, + IRQF_ONESHOT, "tc3589x-gpio", + tc3589x_gpio); if (ret) { dev_err(&pdev->dev, "unable to get irq: %d\n", ret); - goto out_free; + return ret; } ret = gpiochip_add(&tc3589x_gpio->chip); if (ret) { dev_err(&pdev->dev, "unable to add gpiochip: %d\n", ret); - goto out_freeirq; + return ret; + } + + ret = gpiochip_irqchip_add(&tc3589x_gpio->chip, + &tc3589x_gpio_irq_chip, + 0, + handle_simple_irq, + IRQ_TYPE_NONE); + if (ret) { + dev_err(&pdev->dev, + "could not connect irqchip to gpiochip\n"); + return ret; } if (pdata && pdata->setup) @@ -379,12 +306,6 @@ static int tc3589x_gpio_probe(struct platform_device *pdev) platform_set_drvdata(pdev, tc3589x_gpio); return 0; - -out_freeirq: - free_irq(irq, tc3589x_gpio); -out_free: - kfree(tc3589x_gpio); - return ret; } static int tc3589x_gpio_remove(struct platform_device *pdev) @@ -392,7 +313,6 @@ static int tc3589x_gpio_remove(struct platform_device *pdev) struct tc3589x_gpio *tc3589x_gpio = platform_get_drvdata(pdev); struct tc3589x *tc3589x = tc3589x_gpio->tc3589x; struct tc3589x_gpio_platform_data *pdata = tc3589x->pdata->gpio; - int irq = platform_get_irq(pdev, 0); int ret; if (pdata && pdata->remove) @@ -405,10 +325,6 @@ static int tc3589x_gpio_remove(struct platform_device *pdev) return ret; } - free_irq(irq, tc3589x_gpio); - - kfree(tc3589x_gpio); - return 0; } diff --git a/drivers/gpio/gpio-tegra.c b/drivers/gpio/gpio-tegra.c index 2b49f878b56..4e8fb8261a8 100644 --- a/drivers/gpio/gpio-tegra.c +++ b/drivers/gpio/gpio-tegra.c @@ -408,7 +408,7 @@ static struct tegra_gpio_soc_config tegra30_gpio_config = { .upper_offset = 0x80, }; -static struct of_device_id tegra_gpio_of_match[] = { +static const struct of_device_id tegra_gpio_of_match[] = { { .compatible = "nvidia,tegra30-gpio", .data = &tegra30_gpio_config }, { .compatible = "nvidia,tegra20-gpio", .data = &tegra20_gpio_config }, { }, @@ -458,10 +458,8 @@ static int tegra_gpio_probe(struct platform_device *pdev) tegra_gpio_banks = devm_kzalloc(&pdev->dev, tegra_gpio_bank_count * sizeof(*tegra_gpio_banks), GFP_KERNEL); - if (!tegra_gpio_banks) { - dev_err(&pdev->dev, "Couldn't allocate bank structure\n"); + if (!tegra_gpio_banks) return -ENODEV; - } irq_domain = irq_domain_add_linear(pdev->dev.of_node, tegra_gpio_chip.ngpio, diff --git a/drivers/gpio/gpio-timberdale.c b/drivers/gpio/gpio-timberdale.c index f9a8fbde108..efc7c129016 100644 --- a/drivers/gpio/gpio-timberdale.c +++ b/drivers/gpio/gpio-timberdale.c @@ -224,6 +224,7 @@ static struct irq_chip timbgpio_irqchip = { static int timbgpio_probe(struct platform_device *pdev) { int err, i; + struct device *dev = &pdev->dev; struct gpio_chip *gc; struct timbgpio *tgpio; struct resource *iomem; @@ -231,35 +232,35 @@ static int timbgpio_probe(struct platform_device *pdev) int irq = platform_get_irq(pdev, 0); if (!pdata || pdata->nr_pins > 32) { - err = -EINVAL; - goto err_mem; + dev_err(dev, "Invalid platform data\n"); + return -EINVAL; } iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); if (!iomem) { - err = -EINVAL; - goto err_mem; + dev_err(dev, "Unable to get resource\n"); + return -EINVAL; } - tgpio = kzalloc(sizeof(*tgpio), GFP_KERNEL); + tgpio = devm_kzalloc(dev, sizeof(struct timbgpio), GFP_KERNEL); if (!tgpio) { - err = -EINVAL; - goto err_mem; + dev_err(dev, "Memory alloc failed\n"); + return -EINVAL; } tgpio->irq_base = pdata->irq_base; spin_lock_init(&tgpio->lock); - if (!request_mem_region(iomem->start, resource_size(iomem), - DRIVER_NAME)) { - err = -EBUSY; - goto err_request; + if (!devm_request_mem_region(dev, iomem->start, resource_size(iomem), + DRIVER_NAME)) { + dev_err(dev, "Region already claimed\n"); + return -EBUSY; } - tgpio->membase = ioremap(iomem->start, resource_size(iomem)); + tgpio->membase = devm_ioremap(dev, iomem->start, resource_size(iomem)); if (!tgpio->membase) { - err = -ENOMEM; - goto err_ioremap; + dev_err(dev, "Cannot ioremap\n"); + return -ENOMEM; } gc = &tgpio->gpio; @@ -279,7 +280,7 @@ static int timbgpio_probe(struct platform_device *pdev) err = gpiochip_add(gc); if (err) - goto err_chipadd; + return err; platform_set_drvdata(pdev, tgpio); @@ -302,17 +303,6 @@ static int timbgpio_probe(struct platform_device *pdev) irq_set_chained_handler(irq, timbgpio_irq); return 0; - -err_chipadd: - iounmap(tgpio->membase); -err_ioremap: - release_mem_region(iomem->start, resource_size(iomem)); -err_request: - kfree(tgpio); -err_mem: - printk(KERN_ERR DRIVER_NAME": Failed to register GPIOs: %d\n", err); - - return err; } static int timbgpio_remove(struct platform_device *pdev) @@ -320,7 +310,6 @@ static int timbgpio_remove(struct platform_device *pdev) int err; struct timbgpio_platform_data *pdata = dev_get_platdata(&pdev->dev); struct timbgpio *tgpio = platform_get_drvdata(pdev); - struct resource *iomem = platform_get_resource(pdev, IORESOURCE_MEM, 0); int irq = platform_get_irq(pdev, 0); if (irq >= 0 && tgpio->irq_base > 0) { @@ -338,10 +327,6 @@ static int timbgpio_remove(struct platform_device *pdev) if (err) printk(KERN_ERR DRIVER_NAME": failed to remove gpio_chip\n"); - iounmap(tgpio->membase); - release_mem_region(iomem->start, resource_size(iomem)); - kfree(tgpio); - return 0; } diff --git a/drivers/gpio/gpio-tps6586x.c b/drivers/gpio/gpio-tps6586x.c index 8994dfa1349..a69fbea4125 100644 --- a/drivers/gpio/gpio-tps6586x.c +++ b/drivers/gpio/gpio-tps6586x.c @@ -97,10 +97,8 @@ static int tps6586x_gpio_probe(struct platform_device *pdev) pdata = dev_get_platdata(pdev->dev.parent); tps6586x_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps6586x_gpio), GFP_KERNEL); - if (!tps6586x_gpio) { - dev_err(&pdev->dev, "Could not allocate tps6586x_gpio\n"); + if (!tps6586x_gpio) return -ENOMEM; - } tps6586x_gpio->parent = pdev->dev.parent; diff --git a/drivers/gpio/gpio-tps65910.c b/drivers/gpio/gpio-tps65910.c index b6e818e6800..e2f8cda235e 100644 --- a/drivers/gpio/gpio-tps65910.c +++ b/drivers/gpio/gpio-tps65910.c @@ -123,10 +123,8 @@ static int tps65910_gpio_probe(struct platform_device *pdev) tps65910_gpio = devm_kzalloc(&pdev->dev, sizeof(*tps65910_gpio), GFP_KERNEL); - if (!tps65910_gpio) { - dev_err(&pdev->dev, "Could not allocate tps65910_gpio\n"); + if (!tps65910_gpio) return -ENOMEM; - } tps65910_gpio->tps65910 = tps65910; diff --git a/drivers/gpio/gpio-xilinx.c b/drivers/gpio/gpio-xilinx.c index 792a05ad464..12481867daf 100644 --- a/drivers/gpio/gpio-xilinx.c +++ b/drivers/gpio/gpio-xilinx.c @@ -289,7 +289,7 @@ static int xgpio_of_probe(struct device_node *np) return 0; } -static struct of_device_id xgpio_of_match[] = { +static const struct of_device_id xgpio_of_match[] = { { .compatible = "xlnx,xps-gpio-1.00.a", }, { /* end of list */ }, }; diff --git a/drivers/gpio/gpio-zevio.c b/drivers/gpio/gpio-zevio.c index 9bf5034b6cd..54e54e4cc6c 100644 --- a/drivers/gpio/gpio-zevio.c +++ b/drivers/gpio/gpio-zevio.c @@ -81,9 +81,15 @@ static inline void zevio_gpio_port_set(struct zevio_gpio *c, unsigned pin, static int zevio_gpio_get(struct gpio_chip *chip, unsigned pin) { struct zevio_gpio *controller = to_zevio_gpio(chip); + u32 val, dir; - /* Only reading allowed, so no spinlock needed */ - u32 val = zevio_gpio_port_get(controller, pin, ZEVIO_GPIO_INPUT); + spin_lock(&controller->lock); + dir = zevio_gpio_port_get(controller, pin, ZEVIO_GPIO_DIRECTION); + if (dir & BIT(ZEVIO_GPIO_BIT(pin))) + val = zevio_gpio_port_get(controller, pin, ZEVIO_GPIO_INPUT); + else + val = zevio_gpio_port_get(controller, pin, ZEVIO_GPIO_OUTPUT); + spin_unlock(&controller->lock); return (val >> ZEVIO_GPIO_BIT(pin)) & 0x1; } @@ -172,10 +178,8 @@ static int zevio_gpio_probe(struct platform_device *pdev) int status, i; controller = devm_kzalloc(&pdev->dev, sizeof(*controller), GFP_KERNEL); - if (!controller) { - dev_err(&pdev->dev, "not enough free memory\n"); + if (!controller) return -ENOMEM; - } /* Copy our reference */ controller->chip.gc = zevio_gpio_chip; @@ -198,7 +202,7 @@ static int zevio_gpio_probe(struct platform_device *pdev) return 0; } -static struct of_device_id zevio_gpio_of_match[] = { +static const struct of_device_id zevio_gpio_of_match[] = { { .compatible = "lsi,zevio-gpio", }, { }, }; @@ -209,7 +213,7 @@ static struct platform_driver zevio_gpio_driver = { .driver = { .name = "gpio-zevio", .owner = THIS_MODULE, - .of_match_table = of_match_ptr(zevio_gpio_of_match), + .of_match_table = zevio_gpio_of_match, }, .probe = zevio_gpio_probe, }; diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 401add28933..4a987917c18 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -449,9 +449,10 @@ acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, mutex_unlock(&achip->conn_lock); if (function == ACPI_WRITE) - gpiod_set_raw_value(desc, !!((1 << i) & *value)); + gpiod_set_raw_value_cansleep(desc, + !!((1 << i) & *value)); else - *value |= (u64)gpiod_get_raw_value(desc) << i; + *value |= (u64)gpiod_get_raw_value_cansleep(desc) << i; } out: diff --git a/drivers/gpio/gpiolib-of.c b/drivers/gpio/gpiolib-of.c index 2024d45e550..af7e25c9a9a 100644 --- a/drivers/gpio/gpiolib-of.c +++ b/drivers/gpio/gpiolib-of.c @@ -48,7 +48,7 @@ static int of_gpiochip_find_and_xlate(struct gpio_chip *gc, void *data) if (ret < 0) return false; - gg_data->out_gpio = gpio_to_desc(ret + gc->base); + gg_data->out_gpio = gpiochip_get_desc(gc, ret); return true; } @@ -96,6 +96,20 @@ struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np, } EXPORT_SYMBOL(of_get_named_gpiod_flags); +int of_get_named_gpio_flags(struct device_node *np, const char *list_name, + int index, enum of_gpio_flags *flags) +{ + struct gpio_desc *desc; + + desc = of_get_named_gpiod_flags(np, list_name, index, flags); + + if (IS_ERR(desc)) + return PTR_ERR(desc); + else + return desc_to_gpio(desc); +} +EXPORT_SYMBOL(of_get_named_gpio_flags); + /** * of_gpio_simple_xlate - translate gpio_spec to the GPIO number and flags * @gc: pointer to the gpio_chip structure diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c index f48817d9748..d9c9cb4665d 100644 --- a/drivers/gpio/gpiolib.c +++ b/drivers/gpio/gpiolib.c @@ -1363,6 +1363,11 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, int parent_irq, irq_flow_handler_t parent_handler) { + if (gpiochip->can_sleep) { + chip_err(gpiochip, "you cannot have chained interrupts on a chip that may sleep\n"); + return; + } + irq_set_chained_handler(parent_irq, parent_handler); /* * The parent irqchip is already using the chip_data for this @@ -1372,6 +1377,12 @@ void gpiochip_set_chained_irqchip(struct gpio_chip *gpiochip, } EXPORT_SYMBOL_GPL(gpiochip_set_chained_irqchip); +/* + * This lock class tells lockdep that GPIO irqs are in a different + * category than their parents, so it won't report false recursion. + */ +static struct lock_class_key gpiochip_irq_lock_class; + /** * gpiochip_irq_map() - maps an IRQ into a GPIO irqchip * @d: the irqdomain used by this irqchip @@ -1388,22 +1399,35 @@ static int gpiochip_irq_map(struct irq_domain *d, unsigned int irq, struct gpio_chip *chip = d->host_data; irq_set_chip_data(irq, chip); + irq_set_lockdep_class(irq, &gpiochip_irq_lock_class); irq_set_chip_and_handler(irq, chip->irqchip, chip->irq_handler); + /* Chips that can sleep need nested thread handlers */ + if (chip->can_sleep) + irq_set_nested_thread(irq, 1); #ifdef CONFIG_ARM set_irq_flags(irq, IRQF_VALID); #else irq_set_noprobe(irq); #endif - irq_set_irq_type(irq, chip->irq_default_type); + /* + * No set-up of the hardware will happen if IRQ_TYPE_NONE + * is passed as default type. + */ + if (chip->irq_default_type != IRQ_TYPE_NONE) + irq_set_irq_type(irq, chip->irq_default_type); return 0; } static void gpiochip_irq_unmap(struct irq_domain *d, unsigned int irq) { + struct gpio_chip *chip = d->host_data; + #ifdef CONFIG_ARM set_irq_flags(irq, 0); #endif + if (chip->can_sleep) + irq_set_nested_thread(irq, 0); irq_set_chip_and_handler(irq, NULL, NULL); irq_set_chip_data(irq, NULL); } @@ -1471,7 +1495,8 @@ static void gpiochip_irqchip_remove(struct gpio_chip *gpiochip) * @first_irq: if not dynamically assigned, the base (first) IRQ to * allocate gpiochip irqs from * @handler: the irq handler to use (often a predefined irq core function) - * @type: the default type for IRQs on this irqchip + * @type: the default type for IRQs on this irqchip, pass IRQ_TYPE_NONE + * to have the core avoid setting up any default type in the hardware. * * This function closely associates a certain irqchip with a certain * gpiochip, providing an irq domain to translate the local IRQs to @@ -2571,22 +2596,27 @@ void gpiod_add_lookup_table(struct gpiod_lookup_table *table) mutex_unlock(&gpio_lookup_lock); } -#ifdef CONFIG_OF static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, unsigned int idx, enum gpio_lookup_flags *flags) { + static const char *suffixes[] = { "gpios", "gpio" }; char prop_name[32]; /* 32 is max size of property name */ enum of_gpio_flags of_flags; struct gpio_desc *desc; + unsigned int i; - if (con_id) - snprintf(prop_name, 32, "%s-gpios", con_id); - else - snprintf(prop_name, 32, "gpios"); + for (i = 0; i < ARRAY_SIZE(suffixes); i++) { + if (con_id) + snprintf(prop_name, 32, "%s-%s", con_id, suffixes[i]); + else + snprintf(prop_name, 32, "%s", suffixes[i]); - desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx, - &of_flags); + desc = of_get_named_gpiod_flags(dev->of_node, prop_name, idx, + &of_flags); + if (!IS_ERR(desc)) + break; + } if (IS_ERR(desc)) return desc; @@ -2596,14 +2626,6 @@ static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, return desc; } -#else -static struct gpio_desc *of_find_gpio(struct device *dev, const char *con_id, - unsigned int idx, - enum gpio_lookup_flags *flags) -{ - return ERR_PTR(-ENODEV); -} -#endif static struct gpio_desc *acpi_find_gpio(struct device *dev, const char *con_id, unsigned int idx, @@ -2701,7 +2723,7 @@ static struct gpio_desc *gpiod_find(struct device *dev, const char *con_id, } /** - * gpio_get - obtain a GPIO for a given GPIO function + * gpiod_get - obtain a GPIO for a given GPIO function * @dev: GPIO consumer, can be NULL for system-global GPIOs * @con_id: function within the GPIO consumer * @@ -2716,6 +2738,22 @@ struct gpio_desc *__must_check gpiod_get(struct device *dev, const char *con_id) EXPORT_SYMBOL_GPL(gpiod_get); /** + * gpiod_get_optional - obtain an optional GPIO for a given GPIO function + * @dev: GPIO consumer, can be NULL for system-global GPIOs + * @con_id: function within the GPIO consumer + * + * This is equivalent to gpiod_get(), except that when no GPIO was assigned to + * the requested function it will return NULL. This is convenient for drivers + * that need to handle optional GPIOs. + */ +struct gpio_desc *__must_check gpiod_get_optional(struct device *dev, + const char *con_id) +{ + return gpiod_get_index_optional(dev, con_id, 0); +} +EXPORT_SYMBOL_GPL(gpiod_get_optional); + +/** * gpiod_get_index - obtain a GPIO from a multi-index GPIO function * @dev: GPIO consumer, can be NULL for system-global GPIOs * @con_id: function within the GPIO consumer @@ -2778,6 +2816,33 @@ struct gpio_desc *__must_check gpiod_get_index(struct device *dev, EXPORT_SYMBOL_GPL(gpiod_get_index); /** + * gpiod_get_index_optional - obtain an optional GPIO from a multi-index GPIO + * function + * @dev: GPIO consumer, can be NULL for system-global GPIOs + * @con_id: function within the GPIO consumer + * @index: index of the GPIO to obtain in the consumer + * + * This is equivalent to gpiod_get_index(), except that when no GPIO with the + * specified index was assigned to the requested function it will return NULL. + * This is convenient for drivers that need to handle optional GPIOs. + */ +struct gpio_desc *__must_check gpiod_get_index_optional(struct device *dev, + const char *con_id, + unsigned int index) +{ + struct gpio_desc *desc; + + desc = gpiod_get_index(dev, con_id, index); + if (IS_ERR(desc)) { + if (PTR_ERR(desc) == -ENOENT) + return NULL; + } + + return desc; +} +EXPORT_SYMBOL_GPL(gpiod_get_index_optional); + +/** * gpiod_put - dispose of a GPIO descriptor * @desc: GPIO descriptor to dispose of * diff --git a/drivers/gpio/gpiolib.h b/drivers/gpio/gpiolib.h index cf092941a9f..1a4103dd38d 100644 --- a/drivers/gpio/gpiolib.h +++ b/drivers/gpio/gpiolib.h @@ -15,6 +15,8 @@ #include <linux/err.h> #include <linux/device.h> +enum of_gpio_flags; + /** * struct acpi_gpio_info - ACPI GPIO specific information * @gpioint: if %true this GPIO is of type GpioInt otherwise type is GpioIo @@ -46,4 +48,7 @@ acpi_get_gpiod_by_index(struct device *dev, int index, int gpiochip_request_own_desc(struct gpio_desc *desc, const char *label); void gpiochip_free_own_desc(struct gpio_desc *desc); +struct gpio_desc *of_get_named_gpiod_flags(struct device_node *np, + const char *list_name, int index, enum of_gpio_flags *flags); + #endif /* GPIOLIB_H */ |