From: Tarun Kanti DebBarma Date: Tue, 15 Nov 2011 07:22:38 +0000 (+0530) Subject: gpio/omap: remove omap_gpio_save_context overhead X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=41d87cbd660fd5793a6c70f9c93d9dcc8964179d;p=linux-beck.git gpio/omap: remove omap_gpio_save_context overhead 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 suspend callback. Signed-off-by: Tarun Kanti DebBarma Reviewed-by: Santosh Shilimkar Reviewed-by: Kevin Hilman Signed-off-by: Kevin Hilman --- diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 8aeb8dd4342b..62c49e0f7f29 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -101,6 +101,7 @@ 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; } @@ -131,6 +132,7 @@ 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) @@ -244,8 +246,20 @@ static inline void set_gpio_trigger(struct gpio_bank *bank, int gpio, _gpio_rmw(base, 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))) { _gpio_rmw(base, 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 (!bank->regs->irqctrl) { @@ -338,6 +352,8 @@ static int _set_gpio_triggering(struct gpio_bank *bank, int gpio, int trigger) /* Enable wake-up during idle for dynamic tick */ _gpio_rmw(base, 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; @@ -430,6 +446,7 @@ 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) @@ -450,6 +467,7 @@ 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) @@ -541,6 +559,7 @@ 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; @@ -558,9 +577,12 @@ 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 */ _gpio_rmw(base, bank->regs->wkup_en, 1 << offset, 0); + bank->context.wake_en = + __raw_readl(bank->base + bank->regs->wkup_en); + } bank->mod_usage &= ~(1 << offset); @@ -572,6 +594,7 @@ 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); @@ -1159,7 +1182,6 @@ static int omap_gpio_resume(struct device *dev) #endif /* CONFIG_PM_SLEEP */ #if defined(CONFIG_PM_RUNTIME) -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) @@ -1172,7 +1194,7 @@ static int omap_gpio_runtime_suspend(struct device *dev) spin_lock_irqsave(&bank->lock, flags); if (bank->power_mode != OFF_MODE) { bank->power_mode = 0; - goto save_gpio_context; + goto update_gpio_context_count; } /* * If going to OFF, remove triggering for all @@ -1180,7 +1202,7 @@ 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); @@ -1197,12 +1219,11 @@ static int omap_gpio_runtime_suspend(struct device *dev) bank->workaround_enabled = true; -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); _gpio_dbck_disable(bank); spin_unlock_irqrestore(&bank->lock, flags); @@ -1323,27 +1344,6 @@ void omap2_gpio_resume_after_idle(void) } #if defined(CONFIG_PM_RUNTIME) -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 = - __raw_readl(bank->base + bank->regs->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,