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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 <tarun.kanti@ti.com>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Tarun Kanti DebBarma 2012-03-06 12:08:16 +05:30
parent 960edffe29
commit 2a900eb74c
1 changed files with 4 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpio/gpio-omap.c
View File

@ -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)