From 25f27db48e9d741cf3494f36e287d3c34a0fdba3 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Tue, 5 Mar 2013 21:22:38 +0100 Subject: gpio-ich: Check for pin availability at request time Stop checking for pin availability in direction and get functions. These functions can be called repeatedly, so checking every time is bad for performance. Now that requesting GPIO pins is no longer optional, checking for availability at pin request time is enough. Signed-off-by: Jean Delvare Cc: Peter Tyser Cc: Grant Likely Cc: Linus Walleij Signed-off-by: Linus Walleij --- drivers/gpio/gpio-ich.c | 15 +++------------ 1 file changed, 3 insertions(+), 12 deletions(-) (limited to 'drivers/gpio') diff --git a/drivers/gpio/gpio-ich.c b/drivers/gpio/gpio-ich.c index f9dbd503fc40..31682178c59b 100644 --- a/drivers/gpio/gpio-ich.c +++ b/drivers/gpio/gpio-ich.c @@ -135,9 +135,6 @@ static bool ichx_gpio_check_available(struct gpio_chip *gpio, unsigned nr) static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) { - if (!ichx_gpio_check_available(gpio, nr)) - return -ENXIO; - /* * Try setting pin as an input and verify it worked since many pins * are output-only. @@ -151,9 +148,6 @@ static int ichx_gpio_direction_input(struct gpio_chip *gpio, unsigned nr) static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, int val) { - if (!ichx_gpio_check_available(gpio, nr)) - return -ENXIO; - /* Set GPIO output value. */ ichx_write_bit(GPIO_LVL, nr, val, 0); @@ -169,9 +163,6 @@ static int ichx_gpio_direction_output(struct gpio_chip *gpio, unsigned nr, static int ichx_gpio_get(struct gpio_chip *chip, unsigned nr) { - if (!ichx_gpio_check_available(chip, nr)) - return -ENXIO; - return ichx_read_bit(GPIO_LVL, nr); } @@ -180,9 +171,6 @@ static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr) unsigned long flags; u32 data; - if (!ichx_gpio_check_available(chip, nr)) - return -ENXIO; - /* * GPI 0 - 15 need to be read from the power management registers on * a ICH6/3100 bridge. @@ -207,6 +195,9 @@ static int ich6_gpio_get(struct gpio_chip *chip, unsigned nr) static int ichx_gpio_request(struct gpio_chip *chip, unsigned nr) { + if (!ichx_gpio_check_available(chip, nr)) + return -ENXIO; + /* * Note we assume the BIOS properly set a bridge's USE value. Some * chips (eg Intel 3100) have bogus USE values though, so first see if -- cgit v1.2.1