diff options
Diffstat (limited to 'drivers/gpio/gpio-ts4900.c')
| -rw-r--r-- | drivers/gpio/gpio-ts4900.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/gpio/gpio-ts4900.c b/drivers/gpio/gpio-ts4900.c index 69854fd2382a..416725c26e94 100644 --- a/drivers/gpio/gpio-ts4900.c +++ b/drivers/gpio/gpio-ts4900.c @@ -47,8 +47,9 @@ static int ts4900_gpio_direction_input(struct gpio_chip *chip, { struct ts4900_gpio_priv *priv = gpiochip_get_data(chip); - /* Only clear the OE bit here, requires a RMW. Prevents potential issue - * with OE and data getting to the physical pin at different times. + /* + * Only clear the OE bit here, requires a RMW. Prevents a potential issue + * with OE and DAT getting to the physical pin at different times. */ return regmap_update_bits(priv->regmap, offset, TS4900_GPIO_OE, 0); } @@ -60,9 +61,10 @@ static int ts4900_gpio_direction_output(struct gpio_chip *chip, unsigned int reg; int ret; - /* If changing from an input to an output, we need to first set the - * proper data bit to what is requested and then set OE bit. This - * prevents a glitch that can occur on the IO line + /* + * If changing from an input to an output, we need to first set the + * GPIO's DAT bit to what is requested and then set the OE bit. This + * prevents a glitch that can occur on the IO line. */ regmap_read(priv->regmap, offset, ®); if (!(reg & TS4900_GPIO_OE)) { |