Commit 25f27db4 authored by Jean Delvare's avatar Jean Delvare Committed by Linus Walleij
Browse files

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: default avatarJean Delvare <khali@linux-fr.org>
Cc: Peter Tyser <ptyser@xes-inc.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 753c5983

drivers/gpio/gpio-ich.c

+3 −12
Original line number Diff line number Diff line
@@ -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

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