gpio: pca953x: Introduce a long awaited ->get_direction() (66e57192) · Commits · 戴 / test

drivers/gpio/gpio-pca953x.c

+16 −0

Original line number	Diff line number	Diff line
		@@ -363,6 +363,21 @@ exit:
		mutex_unlock(&chip->i2c_lock);
		}

		static int pca953x_gpio_get_direction(struct gpio_chip *gc, unsigned off)
		{
		struct pca953x_chip *chip = gpiochip_get_data(gc);
		u32 reg_val;
		int ret;

		mutex_lock(&chip->i2c_lock);
		ret = pca953x_read_single(chip, chip->regs->direction, &reg_val, off);
		mutex_unlock(&chip->i2c_lock);
		if (ret < 0)
		return ret;

		return !!(reg_val & (1u << (off % BANK_SZ)));
		}

		static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
		unsigned long mask, unsigned long bits)
		{
		@@ -408,6 +423,7 @@ static void pca953x_setup_gpio(struct pca953x_chip *chip, int gpios)
		gc->direction_output = pca953x_gpio_direction_output;
		gc->get = pca953x_gpio_get_value;
		gc->set = pca953x_gpio_set_value;
		gc->get_direction = pca953x_gpio_get_direction;
		gc->set_multiple = pca953x_gpio_set_multiple;
		gc->can_sleep = true;