From mboxrd@z Thu Jan 1 00:00:00 1970 From: plagnioj@jcrosoft.com (Jean-Christophe PLAGNIOL-VILLARD) Date: Sun, 15 Jul 2012 15:40:35 +0200 Subject: [PATCH 2/4] ARM: at91: gpio: implement gpio_free In-Reply-To: <1342359637-15325-1-git-send-email-plagnioj@jcrosoft.com> References: <20120715131618.GF4450@game.jcrosoft.org> <1342359637-15325-1-git-send-email-plagnioj@jcrosoft.com> Message-ID: <1342359637-15325-2-git-send-email-plagnioj@jcrosoft.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org configure a gpio as input when freeing it to reduce power consumption Cc: Nicolas Ferre Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- arch/arm/mach-at91/gpio.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-at91/gpio.c b/arch/arm/mach-at91/gpio.c index 994ed02..3833f82 100644 --- a/arch/arm/mach-at91/gpio.c +++ b/arch/arm/mach-at91/gpio.c @@ -45,6 +45,7 @@ struct at91_gpio_chip { #define to_at91_gpio_chip(c) container_of(c, struct at91_gpio_chip, chip) static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset); +static void at91_gpiolib_free(struct gpio_chip *chip, unsigned offset); static void at91_gpiolib_dbg_show(struct seq_file *s, struct gpio_chip *chip); static void at91_gpiolib_set(struct gpio_chip *chip, unsigned offset, int val); static int at91_gpiolib_get(struct gpio_chip *chip, unsigned offset); @@ -59,6 +60,7 @@ static int at91_gpiolib_to_irq(struct gpio_chip *chip, unsigned offset); .chip = { \ .label = name, \ .request = at91_gpiolib_request, \ + .free = at91_gpiolib_free, \ .direction_input = at91_gpiolib_direction_input, \ .direction_output = at91_gpiolib_direction_output, \ .get = at91_gpiolib_get, \ @@ -863,7 +865,10 @@ void __init at91_gpio_irq_setup(void) } /* gpiolib support */ - +static void at91_gpiolib_free(struct gpio_chip *chip, unsigned offset) +{ + at91_gpiolib_direction_input(chip, offset); +} static int at91_gpiolib_request(struct gpio_chip *chip, unsigned offset) { -- 1.7.10