diff options
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-pca953x.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index d44232aadb6c..782d9adb55b9 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -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, ®_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; |
