diff options
Diffstat (limited to 'drivers/gpio/gpio-lynxpoint.c')
| -rw-r--r-- | drivers/gpio/gpio-lynxpoint.c | 67 |
1 files changed, 50 insertions, 17 deletions
diff --git a/drivers/gpio/gpio-lynxpoint.c b/drivers/gpio/gpio-lynxpoint.c index 2d9ca6055e5..2bea89b7250 100644 --- a/drivers/gpio/gpio-lynxpoint.c +++ b/drivers/gpio/gpio-lynxpoint.c @@ -188,7 +188,7 @@ static int lp_irq_type(struct irq_data *d, unsigned type) static int lp_gpio_get(struct gpio_chip *chip, unsigned offset) { unsigned long reg = lp_gpio_reg(chip, offset, LP_CONFIG1); - return inl(reg) & IN_LVL_BIT; + return !!(inl(reg) & IN_LVL_BIT); } static void lp_gpio_set(struct gpio_chip *chip, unsigned offset, int value) @@ -242,26 +242,28 @@ static int lp_gpio_to_irq(struct gpio_chip *chip, unsigned offset) return irq_create_mapping(lg->domain, offset); } -static void lp_gpio_irq_handler(unsigned irq, struct irq_desc *desc) +static void lp_gpio_irq_handler(unsigned hwirq, struct irq_desc *desc) { struct irq_data *data = irq_desc_get_irq_data(desc); struct lp_gpio *lg = irq_data_get_irq_handler_data(data); struct irq_chip *chip = irq_data_get_irq_chip(data); u32 base, pin, mask; - unsigned long reg, pending; - unsigned virq; + unsigned long reg, ena, pending; /* check from GPIO controller which pin triggered the interrupt */ for (base = 0; base < lg->chip.ngpio; base += 32) { reg = lp_gpio_reg(&lg->chip, base, LP_INT_STAT); + ena = lp_gpio_reg(&lg->chip, base, LP_INT_ENABLE); + + while ((pending = (inl(reg) & inl(ena)))) { + unsigned irq; - while ((pending = inl(reg))) { pin = __ffs(pending); mask = BIT(pin); /* Clear before handling so we don't lose an edge */ outl(mask, reg); - virq = irq_find_mapping(lg->domain, base + pin); - generic_handle_irq(virq); + irq = irq_find_mapping(lg->domain, base + pin); + generic_handle_irq(irq); } } chip->irq_eoi(data); @@ -299,6 +301,26 @@ static void lp_irq_disable(struct irq_data *d) spin_unlock_irqrestore(&lg->lock, flags); } +static int lp_irq_reqres(struct irq_data *d) +{ + struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + + if (gpio_lock_as_irq(&lg->chip, irqd_to_hwirq(d))) { + dev_err(lg->chip.dev, + "unable to lock HW IRQ %lu for IRQ\n", + irqd_to_hwirq(d)); + return -EINVAL; + } + return 0; +} + +static void lp_irq_relres(struct irq_data *d) +{ + struct lp_gpio *lg = irq_data_get_irq_chip_data(d); + + gpio_unlock_as_irq(&lg->chip, irqd_to_hwirq(d)); +} + static struct irq_chip lp_irqchip = { .name = "LP-GPIO", .irq_mask = lp_irq_mask, @@ -306,6 +328,8 @@ static struct irq_chip lp_irqchip = { .irq_enable = lp_irq_enable, .irq_disable = lp_irq_disable, .irq_set_type = lp_irq_type, + .irq_request_resources = lp_irq_reqres, + .irq_release_resources = lp_irq_relres, .flags = IRQCHIP_SKIP_SET_WAKE, }; @@ -324,15 +348,14 @@ static void lp_gpio_irq_init_hw(struct lp_gpio *lg) } } -static int lp_gpio_irq_map(struct irq_domain *d, unsigned int virq, - irq_hw_number_t hw) +static int lp_gpio_irq_map(struct irq_domain *d, unsigned int irq, + irq_hw_number_t hwirq) { struct lp_gpio *lg = d->host_data; - irq_set_chip_and_handler_name(virq, &lp_irqchip, handle_simple_irq, - "demux"); - irq_set_chip_data(virq, lg); - irq_set_irq_type(virq, IRQ_TYPE_NONE); + irq_set_chip_and_handler(irq, &lp_irqchip, handle_simple_irq); + irq_set_chip_data(irq, lg); + irq_set_irq_type(irq, IRQ_TYPE_NONE); return 0; } @@ -352,10 +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); @@ -390,7 +411,7 @@ static int lp_gpio_probe(struct platform_device *pdev) gc->set = lp_gpio_set; gc->base = -1; gc->ngpio = LP_NUM_GPIO; - gc->can_sleep = 0; + gc->can_sleep = false; gc->dev = dev; /* set up interrupts */ @@ -436,6 +457,7 @@ static const struct dev_pm_ops lp_gpio_pm_ops = { static const struct acpi_device_id lynxpoint_gpio_acpi_match[] = { { "INT33C7", 0 }, + { "INT3437", 0 }, { } }; MODULE_DEVICE_TABLE(acpi, lynxpoint_gpio_acpi_match); @@ -467,4 +489,15 @@ static int __init lp_gpio_init(void) return platform_driver_register(&lp_gpio_driver); } +static void __exit lp_gpio_exit(void) +{ + platform_driver_unregister(&lp_gpio_driver); +} + subsys_initcall(lp_gpio_init); +module_exit(lp_gpio_exit); + +MODULE_AUTHOR("Mathias Nyman (Intel)"); +MODULE_DESCRIPTION("GPIO interface for Intel Lynxpoint"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:lp_gpio"); |