From: Yegor Yefremov <[email protected]> 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 <[email protected]> Acked-by: Javier Martinez Canillas <[email protected]> --- 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 <linux/irqdomain.h> #include <linux/irqchip/chained_irq.h> #include <linux/gpio.h> +#include <linux/bitops.h> #include <linux/platform_data/gpio-omap.h> #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 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
