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gpio: rcar: Cache gpiochip_get_data() return value 

Since commit 43c54ecade ("gpio: move the subdriver data pointer
into gpio_device") changed gpiochip_get_data() to an out-of-line
function, it is now worthwhile to avoid multiple calls in a row by
caching its return value in a local variable.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
This commit is contained in:
Geert Uytterhoeven 2020-10-28 15:15:01 +01:00 committed by Bartosz Golaszewski
parent 5e2ca893d7
commit 714d3a2958
1 changed files with 4 additions and 3 deletions
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7
drivers/gpio/gpio-rcar.c
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@ -295,14 +295,15 @@ static int gpio_rcar_direction_input(struct gpio_chip *chip, unsigned offset)
static int gpio_rcar_get(struct gpio_chip *chip, unsigned offset)
{
struct gpio_rcar_priv *p = gpiochip_get_data(chip);
u32 bit = BIT(offset);
/* testing on r8a7790 shows that INDT does not show correct pin state
* when configured as output, so use OUTDT in case of output pins */
if (gpio_rcar_read(gpiochip_get_data(chip), INOUTSEL) & bit)
return !!(gpio_rcar_read(gpiochip_get_data(chip), OUTDT) & bit);
if (gpio_rcar_read(p, INOUTSEL) & bit)
return !!(gpio_rcar_read(p, OUTDT) & bit);
else
return !!(gpio_rcar_read(gpiochip_get_data(chip), INDT) & bit);
return !!(gpio_rcar_read(p, INDT) & bit);
}
static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value)