From mboxrd@z Thu Jan 1 00:00:00 1970 From: yegorslists@googlemail.com (yegorslists at googlemail.com) Date: Thu, 24 Apr 2014 08:57:39 +0200 Subject: [PATCH v3] gpio: omap: implement get_direction Message-ID: <1398322659-20008-1-git-send-email-yegorslists@googlemail.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org From: Yegor Yefremov This patch implements gpio_chip's get_direction() routine, that lets other drivers get particular GPIOs direction using struct gpio_desc. Signed-off-by: Yegor Yefremov Acked-by: Javier Martinez Canillas --- Changes: v3: get rid of _get_gpio_direction() (Linus Walleij) v2: rework return value calculation drivers/gpio/gpio-omap.c | 17 +++++++++++++++++ 1 files changed, 17 insertions(+), 0 deletions(-) diff --git a/drivers/gpio/gpio-omap.c b/drivers/gpio/gpio-omap.c index 19b886c..62c12e4 100644 --- a/drivers/gpio/gpio-omap.c +++ b/drivers/gpio/gpio-omap.c @@ -27,6 +27,7 @@ #include #include #include +#include #include #define OFF_MODE 1 @@ -936,6 +937,21 @@ static inline void mpuio_init(struct gpio_bank *bank) /*---------------------------------------------------------------------*/ +static int gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct gpio_bank *bank; + unsigned long flags; + void __iomem *reg; + int dir; + + bank = container_of(chip, struct gpio_bank, chip); + reg = bank->base + bank->regs->direction; + spin_lock_irqsave(&bank->lock, flags); + dir = !!(readl_relaxed(reg) & BIT(offset)); + spin_unlock_irqrestore(&bank->lock, flags); + return dir; +} + static int gpio_input(struct gpio_chip *chip, unsigned offset) { struct gpio_bank *bank; @@ -1092,6 +1108,7 @@ static void omap_gpio_chip_init(struct gpio_bank *bank) */ bank->chip.request = omap_gpio_request; bank->chip.free = omap_gpio_free; + bank->chip.get_direction = gpio_get_direction; bank->chip.direction_input = gpio_input; bank->chip.get = gpio_get; bank->chip.direction_output = gpio_output; -- 1.7.7