Context is now saved dynamically in respective functions whenever and
whichever registers are modified. This avoid overhead of saving all
registers context in the runtime callback.
Signed-off-by: Tarun Kanti DebBarma <tarun.kanti@xxxxxx>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@xxxxxx>
---
drivers/gpio/gpio-omap.c | 62 ++++++++++++++++++++++++++-------------------
1 files changed, 36 insertions(+), 26 deletions(-)
diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c
index 67c5a96..dc382f6 100644
--- a/drivers/gpio/gpio-omap.c
+++ b/drivers/gpio/gpio-omap.c
@@ -97,6 +97,7 @@ static void _set_gpio_direction(struct gpio_bank *bank, int gpio, int is_input)
else
l &= ~(1 << gpio);
__raw_writel(l, reg);
+ bank->context.oe = l;
}
@@ -127,6 +128,7 @@ static void _set_gpio_dataout_mask(struct gpio_bank *bank, int gpio, int enable)
else
l &= ~gpio_bit;
__raw_writel(l, reg);
+ bank->context.dataout = l;
}
static int _get_gpio_datain(struct gpio_bank *bank, int gpio)
@@ -212,9 +214,20 @@ static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio,
MOD_REG_BIT(bank->regs->fallingdetect, gpio_bit,
trigger & IRQ_TYPE_EDGE_FALLING);
- if (likely(!(bank->non_wakeup_gpios & gpio_bit)))
+ bank->context.leveldetect0 =
+ __raw_readl(bank->base + bank->regs->leveldetect0);
+ bank->context.leveldetect1 =
+ __raw_readl(bank->base + bank->regs->leveldetect1);
+ bank->context.risingdetect =
+ __raw_readl(bank->base + bank->regs->risingdetect);
+ bank->context.fallingdetect =
+ __raw_readl(bank->base + bank->regs->fallingdetect);
+ if (likely(!(bank->non_wakeup_gpios & gpio_bit))) {
MOD_REG_BIT(bank->regs->wkup_en, gpio_bit,
trigger != 0);
+ bank->context.wake_en =
+ __raw_readl(bank->base + bank->regs->wkup_en);
+ }
/* This part needs to be executed always for OMAP{34xx, 44xx} */
if (cpu_is_omap34xx() || cpu_is_omap44xx() ||
@@ -301,6 +314,8 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger)
/* Enable wake-up during idle for dynamic tick */
MOD_REG_BIT(bank->regs->wkup_en, 1 << gpio, trigger);
+ bank->context.wake_en =
+ __raw_readl(bank->base + bank->regs->wkup_en);
__raw_writel(l, reg);
}
return 0;
@@ -393,6 +408,7 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
}
__raw_writel(l, reg);
+ bank->context.irqenable1 = l;
}
static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
@@ -413,6 +429,7 @@ static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask)
}
__raw_writel(l, reg);
+ bank->context.irqenable1 = l;
}
static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)
@@ -511,6 +528,7 @@ static int omap_gpio_request(struct gpio_chip *chip, unsigned offset)
/* Module is enabled, clocks are not gated */
ctrl &= ~GPIO_MOD_CTRL_BIT;
__raw_writel(ctrl, reg);
+ bank->context.ctrl = ctrl;
}
bank->mod_usage |= 1 << offset;
@@ -528,9 +546,12 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
spin_lock_irqsave(&bank->lock, flags);
- if (bank->regs->wkup_en)
+ if (bank->regs->wkup_en) {
/* Disable wake-up during idle for dynamic tick */
MOD_REG_BIT(bank->regs->wkup_en, 1 << offset, 0);
+ bank->context.wake_en =
+ __raw_readl(bank->base + bank->regs->wkup_en);
+ }
bank->mod_usage &= ~(1 << offset);
@@ -542,6 +563,7 @@ static void omap_gpio_free(struct gpio_chip *chip, unsigned offset)
/* Module is disabled, clocks are gated */
ctrl |= GPIO_MOD_CTRL_BIT;
__raw_writel(ctrl, reg);
+ bank->context.ctrl = ctrl;
}
_reset_gpio(bank, bank->chip.base + offset);
@@ -908,6 +930,8 @@ static void omap_gpio_mod_init(struct gpio_bank *bank)
bank->regs->irqenable_inv == false);
MOD_REG_BIT(bank->regs->irqenable, l, bank->regs->debounce_en != 0);
MOD_REG_BIT(bank->regs->irqenable, l, bank->regs->ctrl != 0);
+ bank->context.irqenable1 =
+ __raw_readl(bank->base + bank->regs->irqenable);
}
static __init void
@@ -1098,6 +1122,7 @@ static int omap_gpio_suspend(struct device *dev)
spin_lock_irqsave(&bank->lock, flags);
bank->saved_wakeup = __raw_readl(wake_status);
MOD_REG_BIT(bank->regs->wkup_en, bank->suspend_wakeup, 1);
+ bank->context.wake_en = __raw_readl(bank->base + bank->regs->wkup_en);
spin_unlock_irqrestore(&bank->lock, flags);
pm_runtime_put_sync(dev);
return 0;
@@ -1116,6 +1141,7 @@ static int omap_gpio_resume(struct device *dev)
pm_runtime_get_sync(dev);
spin_lock_irqsave(&bank->lock, flags);
MOD_REG_BIT(bank->regs->wkup_en, bank->saved_wakeup, 1);
+ bank->context.wake_en = __raw_readl(bank->base + bank->regs->wkup_en);
spin_unlock_irqrestore(&bank->lock, flags);
return 0;
@@ -1123,7 +1149,6 @@ static int omap_gpio_resume(struct device *dev)
#ifdef CONFIG_ARCH_OMAP2PLUS
-static void omap_gpio_save_context(struct gpio_bank *bank);
static void omap_gpio_restore_context(struct gpio_bank *bank);
static int omap_gpio_runtime_suspend(struct device *dev)
@@ -1145,7 +1170,7 @@ static int omap_gpio_runtime_suspend(struct device *dev)
* generated. See OMAP2420 Errata item 1.101.
*/
if (!(bank->enabled_non_wakeup_gpios))
- goto save_gpio_context;
+ goto update_gpio_context_count;
bank->saved_datain = __raw_readl(bank->base +
bank->regs->datain);
@@ -1159,12 +1184,13 @@ static int omap_gpio_runtime_suspend(struct device *dev)
__raw_writel(l1, bank->base + bank->regs->fallingdetect);
__raw_writel(l2, bank->base + bank->regs->risingdetect);
+ bank->context.fallingdetect = l1;
+ bank->context.risingdetect = l2;
-save_gpio_context:
+update_gpio_context_count:
if (bank->get_context_loss_count)
bank->context_loss_count =
bank->get_context_loss_count(bank->dev);
- omap_gpio_save_context(bank);
return 0;
}
@@ -1200,6 +1226,8 @@ static int omap_gpio_runtime_resume(struct device *dev)
bank->base + bank->regs->fallingdetect);
__raw_writel(bank->saved_risingdetect,
bank->base + bank->regs->risingdetect);
+ bank->context.fallingdetect = bank->saved_fallingdetect;
+ bank->context.risingdetect = bank->saved_risingdetect;
l = __raw_readl(bank->base + bank->regs->datain);
/*
@@ -1244,6 +1272,8 @@ static int omap_gpio_runtime_resume(struct device *dev)
}
__raw_writel(old0, bank->base + bank->regs->leveldetect0);
__raw_writel(old1, bank->base + bank->regs->leveldetect1);
+ bank->context.leveldetect0 = old0;
+ bank->context.leveldetect1 = old1;
}
return 0;
@@ -1282,26 +1312,6 @@ void omap2_gpio_resume_after_idle(void)
}
}
-static void omap_gpio_save_context(struct gpio_bank *bank)
-{
- bank->context.irqenable1 =
- __raw_readl(bank->base + bank->regs->irqenable);
- bank->context.irqenable2 =
- __raw_readl(bank->base + bank->regs->irqenable2);
- bank->context.wake_en =
- __raw_readl(bank->base + bank->regs->wkup_en);
- bank->context.ctrl = __raw_readl(bank->base + bank->regs->ctrl);
- bank->context.oe = __raw_readl(bank->base + bank->regs->direction);
- bank->context.leveldetect0 =
- __raw_readl(bank->base + bank->regs->leveldetect0);
- bank->context.leveldetect1 =
- __raw_readl(bank->base + bank->regs->leveldetect1);
- bank->context.risingdetect =
- __raw_readl(bank->base + bank->regs->risingdetect);
- bank->context.fallingdetect =
- bank->context.dataout = __raw_readl(bank->base + bank->regs->dataout);
-}
-
static void omap_gpio_restore_context(struct gpio_bank *bank)
{
__raw_writel(bank->context.irqenable1,
--
1.7.0.4
--
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