gpio: twl4030: Implement .get_direction() (ab8c1e82) · Commits · 戴 / test

drivers/gpio/gpio-twl4030.c

+41 −1

Original line number	Diff line number	Diff line
		@@ -154,6 +154,23 @@ static int twl4030_set_gpio_direction(int gpio, int is_input)
		return ret;
		}

		static int twl4030_get_gpio_direction(int gpio)
		{
		u8 d_bnk = gpio >> 3;
		u8 d_msk = BIT(gpio & 0x7);
		u8 base = REG_GPIODATADIR1 + d_bnk;
		int ret = 0;

		ret = gpio_twl4030_read(base);
		if (ret < 0)
		return ret;

		/* 1 = output, but gpiolib semantics are inverse so invert */
		ret = !(ret & d_msk);

		return ret;
		}

		static int twl4030_set_gpio_dataout(int gpio, int enable)
		{
		u8 d_bnk = gpio >> 3;
		@@ -359,6 +376,28 @@ static int twl_direction_out(struct gpio_chip *chip, unsigned offset, int value)
		return ret;
		}

		static int twl_get_direction(struct gpio_chip *chip, unsigned offset)
		{
		struct gpio_twl4030_priv *priv = gpiochip_get_data(chip);
		/*
		* Default 0 = output
		* LED GPIOs >= TWL4030_GPIO_MAX are always output
		*/
		int ret = 0;

		mutex_lock(&priv->mutex);
		if (offset < TWL4030_GPIO_MAX) {
		ret = twl4030_get_gpio_direction(offset);
		if (ret) {
		mutex_unlock(&priv->mutex);
		return ret;
		}
		}
		mutex_unlock(&priv->mutex);

		return ret;
		}

		static int twl_to_irq(struct gpio_chip *chip, unsigned offset)
		{
		struct gpio_twl4030_priv *priv = gpiochip_get_data(chip);
		@@ -374,8 +413,9 @@ static const struct gpio_chip template_chip = {
		.request = twl_request,
		.free = twl_free,
		.direction_input = twl_direction_in,
		.get = twl_get,
		.direction_output = twl_direction_out,
		.get_direction = twl_get_direction,
		.get = twl_get,
		.set = twl_set,
		.to_irq = twl_to_irq,
		.can_sleep = true,