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gpio: pca953x: Introduce a long awaited ->get_direction()

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Introduce ->get_direction() callback for the driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[Removed use of GPIOF_DIR* flags]
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Andy Shevchenko 2017-03-22 16:11:11 +02:00 committed by Linus Walleij
parent d2cabc4a23
commit 66e5719231
1 changed files with 16 additions and 0 deletions
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16
drivers/gpio/gpio-pca953x.c
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@ -363,6 +363,21 @@ static void pca953x_gpio_set_value(struct gpio_chip *gc, unsigned off, int val)
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;