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gpio: omap: simplify omap_toggle_gpio_edge_triggering()

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This function open-codes an exclusive-or bitwise operation using an
if() statement and explicitly setting or clearing the bit. Instead,
use an exclusive-or operation instead, and simplify the function.

We can combine the preprocessor conditional using IS_ENABLED() and
gain some additional compilation coverage.

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Russell King 2019-06-10 20:10:56 +03:00 committed by Linus Walleij
parent 8ee1de65a9
commit a47b91587f
1 changed files with 4 additions and 18 deletions
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22
drivers/gpio/gpio-omap.c
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@ -326,32 +326,18 @@ static inline void omap_set_gpio_trigger(struct gpio_bank *bank, int gpio,
}
}
#ifdef CONFIG_ARCH_OMAP1
/*
* This only applies to chips that can't do both rising and falling edge
* detection at once. For all other chips, this function is a noop.
*/
static void omap_toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio)
{
void __iomem *reg = bank->base;
u32 l = 0;
if (IS_ENABLED(CONFIG_ARCH_OMAP1) && bank->regs->irqctrl) {
void __iomem *reg = bank->base + bank->regs->irqctrl;
if (!bank->regs->irqctrl)
return;
reg += bank->regs->irqctrl;
l = readl_relaxed(reg);
if ((l >> gpio) & 1)
l &= ~(BIT(gpio));
else
l |= BIT(gpio);
writel_relaxed(l, reg);
writel_relaxed(readl_relaxed(reg) ^ BIT(gpio), reg);
}
}
#else
static void omap_toggle_gpio_edge_triggering(struct gpio_bank *bank, int gpio) {}
#endif
static int omap_set_gpio_triggering(struct gpio_bank *bank, int gpio,
unsigned trigger)