From 2a900eb74c123a21054836ab2c63d6ff46f854c6 Mon Sep 17 00:00:00 2001 From: Tarun Kanti DebBarma Date: Tue, 6 Mar 2012 12:08:16 +0530 Subject: [PATCH] gpio/omap: fix incorrect update to context.irqenable1 In _enable_gpio_irqbank() when bank->regs->set_irqenable is TRUE, gpio_mask can be directly set by writing to set_irqenable register without overwriting current value. In order to ensure the same is stored in context.irqenable1, we must avoid overwriting it with gpio_mask at the end of the function. Instead, update irqenable1 appropriately by OR'ing with gpio_mask. For the case where bank->regs->set_irqenable is FALSE, irqenable1 can be directly overwritten with 'l' which holds correct computed value. if (bank->regs->set_irqenable) { reg += bank->regs->set_irqenable; l = gpio_mask; } else { reg += bank->regs->irqenable; l = __raw_readl(reg); if (bank->regs->irqenable_inv) l &= ~gpio_mask; else l |= gpio_mask; } Make similar change for _disable_gpio_irqbank(). Signed-off-by: Tarun Kanti DebBarma Reviewed-by: Santosh Shilimkar Reviewed-by: Kevin Hilman Signed-off-by: Kevin Hilman --- drivers/gpio/gpio-omap.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index bcb1061dbd6d..6c17e5812312 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -451,6 +451,7 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) if (bank->regs->set_irqenable) { reg += bank->regs->set_irqenable; l = gpio_mask; + bank->context.irqenable1 |= gpio_mask; } else { reg += bank->regs->irqenable; l = __raw_readl(reg); @@ -458,10 +459,10 @@ static void _enable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) l &= ~gpio_mask; else l |= gpio_mask; + bank->context.irqenable1 = l; } __raw_writel(l, reg); - bank->context.irqenable1 = l; } static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) @@ -472,6 +473,7 @@ static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) if (bank->regs->clr_irqenable) { reg += bank->regs->clr_irqenable; l = gpio_mask; + bank->context.irqenable1 &= ~gpio_mask; } else { reg += bank->regs->irqenable; l = __raw_readl(reg); @@ -479,10 +481,10 @@ static void _disable_gpio_irqbank(struct gpio_bank *bank, int gpio_mask) l |= gpio_mask; else l &= ~gpio_mask; + bank->context.irqenable1 = l; } __raw_writel(l, reg); - bank->context.irqenable1 = l; } static inline void _set_gpio_irqenable(struct gpio_bank *bank, int gpio, int enable)