diff options
Diffstat (limited to 'drivers/pinctrl/pinctrl-st.c')
| -rw-r--r-- | drivers/pinctrl/pinctrl-st.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/drivers/pinctrl/pinctrl-st.c b/drivers/pinctrl/pinctrl-st.c index 10ad19c73900..52a437738cc2 100644 --- a/drivers/pinctrl/pinctrl-st.c +++ b/drivers/pinctrl/pinctrl-st.c @@ -206,7 +206,6 @@ #define gpio_chip_to_bank(chip) \ container_of(chip, struct st_gpio_bank, gpio_chip) - enum st_retime_style { st_retime_style_none, st_retime_style_packed, @@ -781,6 +780,35 @@ static int st_gpio_direction_output(struct gpio_chip *chip, return 0; } +static int st_gpio_get_direction(struct gpio_chip *chip, unsigned offset) +{ + struct st_gpio_bank *bank = gpio_chip_to_bank(chip); + struct st_pio_control pc = bank->pc; + unsigned long config; + unsigned int direction = 0; + unsigned int function; + unsigned int value; + int i = 0; + + /* Alternate function direction is handled by Pinctrl */ + function = st_pctl_get_pin_function(&pc, offset); + if (function) { + st_pinconf_get_direction(&pc, offset, &config); + return !ST_PINCONF_UNPACK_OE(config); + } + + /* + * GPIO direction is handled differently + * - See st_gpio_direction() above for an explanation + */ + for (i = 0; i <= 2; i++) { + value = readl(bank->base + REG_PIO_PC(i)); + direction |= ((value >> offset) & 0x1) << i; + } + + return (direction == ST_GPIO_DIRECTION_IN); +} + static int st_gpio_xlate(struct gpio_chip *gc, const struct of_phandle_args *gpiospec, u32 *flags) { @@ -1452,6 +1480,7 @@ static struct gpio_chip st_gpio_template = { .set = st_gpio_set, .direction_input = st_gpio_direction_input, .direction_output = st_gpio_direction_output, + .get_direction = st_gpio_get_direction, .ngpio = ST_GPIO_PINS_PER_BANK, .of_gpio_n_cells = 1, .of_xlate = st_gpio_xlate, |