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path: root/drivers/gpio/gpio-omap.c
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Diffstat (limited to 'drivers/gpio/gpio-omap.c')
-rw-r--r--drivers/gpio/gpio-omap.c112
1 files changed, 26 insertions, 86 deletions
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 1adc2ec1e38..9b71f04538a 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -57,14 +57,10 @@ struct gpio_bank {
u16 irq;
int irq_base;
struct irq_domain *domain;
- u32 suspend_wakeup;
- u32 saved_wakeup;
u32 non_wakeup_gpios;
u32 enabled_non_wakeup_gpios;
struct gpio_regs context;
u32 saved_datain;
- u32 saved_fallingdetect;
- u32 saved_risingdetect;
u32 level_mask;
u32 toggle_mask;
spinlock_t lock;
@@ -516,11 +512,11 @@ static int _set_gpio_wakeup(struct gpio_bank *bank, int gpio, int enable)
spin_lock_irqsave(&bank->lock, flags);
if (enable)
- bank->suspend_wakeup |= gpio_bit;
+ bank->context.wake_en |= gpio_bit;
else
- bank->suspend_wakeup &= ~gpio_bit;
+ bank->context.wake_en &= ~gpio_bit;
- __raw_writel(bank->suspend_wakeup, bank->base + bank->regs->wkup_en);
+ __raw_writel(bank->context.wake_en, bank->base + bank->regs->wkup_en);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@@ -640,7 +636,6 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
u32 isr;
unsigned int gpio_irq, gpio_index;
struct gpio_bank *bank;
- u32 retrigger = 0;
int unmasked = 0;
struct irq_chip *chip = irq_desc_get_chip(desc);
@@ -677,8 +672,6 @@ static void gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
chained_irq_exit(chip, desc);
}
- isr |= retrigger;
- retrigger = 0;
if (!isr)
break;
@@ -789,8 +782,7 @@ static int omap_mpuio_suspend_noirq(struct device *dev)
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
- bank->saved_wakeup = __raw_readl(mask_reg);
- __raw_writel(0xffff & ~bank->suspend_wakeup, mask_reg);
+ __raw_writel(0xffff & ~bank->context.wake_en, mask_reg);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@@ -805,7 +797,7 @@ static int omap_mpuio_resume_noirq(struct device *dev)
unsigned long flags;
spin_lock_irqsave(&bank->lock, flags);
- __raw_writel(bank->saved_wakeup, mask_reg);
+ __raw_writel(bank->context.wake_en, mask_reg);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@@ -965,18 +957,15 @@ static void omap_gpio_mod_init(struct gpio_bank *bank)
}
_gpio_rmw(base, bank->regs->irqenable, l, bank->regs->irqenable_inv);
- _gpio_rmw(base, bank->regs->irqstatus, l,
- bank->regs->irqenable_inv == false);
- _gpio_rmw(base, bank->regs->irqenable, l, bank->regs->debounce_en != 0);
- _gpio_rmw(base, bank->regs->irqenable, l, bank->regs->ctrl != 0);
+ _gpio_rmw(base, bank->regs->irqstatus, l, !bank->regs->irqenable_inv);
if (bank->regs->debounce_en)
- _gpio_rmw(base, bank->regs->debounce_en, 0, 1);
+ __raw_writel(0, base + bank->regs->debounce_en);
/* Save OE default value (0xffffffff) in the context */
bank->context.oe = __raw_readl(bank->base + bank->regs->direction);
/* Initialize interface clk ungated, module enabled */
if (bank->regs->ctrl)
- _gpio_rmw(base, bank->regs->ctrl, 0, 1);
+ __raw_writel(0, base + bank->regs->ctrl);
}
static __devinit void
@@ -1155,54 +1144,6 @@ static int __devinit omap_gpio_probe(struct platform_device *pdev)
#ifdef CONFIG_ARCH_OMAP2PLUS
-#if defined(CONFIG_PM_SLEEP)
-static int omap_gpio_suspend(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct gpio_bank *bank = platform_get_drvdata(pdev);
- void __iomem *base = bank->base;
- void __iomem *wakeup_enable;
- unsigned long flags;
-
- if (!bank->mod_usage || !bank->loses_context)
- return 0;
-
- if (!bank->regs->wkup_en || !bank->suspend_wakeup)
- return 0;
-
- wakeup_enable = bank->base + bank->regs->wkup_en;
-
- spin_lock_irqsave(&bank->lock, flags);
- bank->saved_wakeup = __raw_readl(wakeup_enable);
- _gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0);
- _gpio_rmw(base, bank->regs->wkup_en, bank->suspend_wakeup, 1);
- spin_unlock_irqrestore(&bank->lock, flags);
-
- return 0;
-}
-
-static int omap_gpio_resume(struct device *dev)
-{
- struct platform_device *pdev = to_platform_device(dev);
- struct gpio_bank *bank = platform_get_drvdata(pdev);
- void __iomem *base = bank->base;
- unsigned long flags;
-
- if (!bank->mod_usage || !bank->loses_context)
- return 0;
-
- if (!bank->regs->wkup_en || !bank->saved_wakeup)
- return 0;
-
- spin_lock_irqsave(&bank->lock, flags);
- _gpio_rmw(base, bank->regs->wkup_en, 0xffffffff, 0);
- _gpio_rmw(base, bank->regs->wkup_en, bank->saved_wakeup, 1);
- spin_unlock_irqrestore(&bank->lock, flags);
-
- return 0;
-}
-#endif /* CONFIG_PM_SLEEP */
-
#if defined(CONFIG_PM_RUNTIME)
static void omap_gpio_restore_context(struct gpio_bank *bank);
@@ -1216,6 +1157,9 @@ static int omap_gpio_runtime_suspend(struct device *dev)
spin_lock_irqsave(&bank->lock, flags);
+ if (!bank->enabled_non_wakeup_gpios)
+ goto update_gpio_context_count;
+
/*
* Only edges can generate a wakeup event to the PRCM.
*
@@ -1247,11 +1191,9 @@ static int omap_gpio_runtime_suspend(struct device *dev)
*/
bank->saved_datain = __raw_readl(bank->base +
bank->regs->datain);
- l1 = __raw_readl(bank->base + bank->regs->fallingdetect);
- l2 = __raw_readl(bank->base + bank->regs->risingdetect);
+ l1 = bank->context.fallingdetect;
+ l2 = bank->context.risingdetect;
- bank->saved_fallingdetect = l1;
- bank->saved_risingdetect = l2;
l1 &= ~bank->enabled_non_wakeup_gpios;
l2 &= ~bank->enabled_non_wakeup_gpios;
@@ -1293,11 +1235,6 @@ static int omap_gpio_runtime_resume(struct device *dev)
__raw_writel(bank->context.risingdetect,
bank->base + bank->regs->risingdetect);
- if (!bank->workaround_enabled) {
- spin_unlock_irqrestore(&bank->lock, flags);
- return 0;
- }
-
if (bank->get_context_loss_count) {
context_lost_cnt_after =
bank->get_context_loss_count(bank->dev);
@@ -1310,9 +1247,14 @@ static int omap_gpio_runtime_resume(struct device *dev)
}
}
- __raw_writel(bank->saved_fallingdetect,
+ if (!bank->workaround_enabled) {
+ spin_unlock_irqrestore(&bank->lock, flags);
+ return 0;
+ }
+
+ __raw_writel(bank->context.fallingdetect,
bank->base + bank->regs->fallingdetect);
- __raw_writel(bank->saved_risingdetect,
+ __raw_writel(bank->context.risingdetect,
bank->base + bank->regs->risingdetect);
l = __raw_readl(bank->base + bank->regs->datain);
@@ -1329,14 +1271,15 @@ static int omap_gpio_runtime_resume(struct device *dev)
* No need to generate IRQs for the rising edge for gpio IRQs
* configured with falling edge only; and vice versa.
*/
- gen0 = l & bank->saved_fallingdetect;
+ gen0 = l & bank->context.fallingdetect;
gen0 &= bank->saved_datain;
- gen1 = l & bank->saved_risingdetect;
+ gen1 = l & bank->context.risingdetect;
gen1 &= ~(bank->saved_datain);
/* FIXME: Consider GPIO IRQs with level detections properly! */
- gen = l & (~(bank->saved_fallingdetect) & ~(bank->saved_risingdetect));
+ gen = l & (~(bank->context.fallingdetect) &
+ ~(bank->context.risingdetect));
/* Consider all GPIO IRQs needed to be updated */
gen |= gen0 | gen1;
@@ -1346,14 +1289,14 @@ static int omap_gpio_runtime_resume(struct device *dev)
old0 = __raw_readl(bank->base + bank->regs->leveldetect0);
old1 = __raw_readl(bank->base + bank->regs->leveldetect1);
- if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
+ if (!bank->regs->irqstatus_raw0) {
__raw_writel(old0 | gen, bank->base +
bank->regs->leveldetect0);
__raw_writel(old1 | gen, bank->base +
bank->regs->leveldetect1);
}
- if (cpu_is_omap44xx()) {
+ if (bank->regs->irqstatus_raw0) {
__raw_writel(old0 | l, bank->base +
bank->regs->leveldetect0);
__raw_writel(old1 | l, bank->base +
@@ -1432,14 +1375,11 @@ static void omap_gpio_restore_context(struct gpio_bank *bank)
}
#endif /* CONFIG_PM_RUNTIME */
#else
-#define omap_gpio_suspend NULL
-#define omap_gpio_resume NULL
#define omap_gpio_runtime_suspend NULL
#define omap_gpio_runtime_resume NULL
#endif
static const struct dev_pm_ops gpio_pm_ops = {
- SET_SYSTEM_SLEEP_PM_OPS(omap_gpio_suspend, omap_gpio_resume)
SET_RUNTIME_PM_OPS(omap_gpio_runtime_suspend, omap_gpio_runtime_resume,
NULL)
};
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-12-15 17:06:06 +0000