diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpio/zynq_gpio.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpio/zynq_gpio.c b/drivers/gpio/zynq_gpio.c index 3a995f6..4ab2356 100644 --- a/drivers/gpio/zynq_gpio.c +++ b/drivers/gpio/zynq_gpio.c @@ -299,11 +299,33 @@ static int zynq_gpio_direction_output(struct udevice *dev, unsigned gpio, return 0; } +static int zynq_gpio_get_function(struct udevice *dev, unsigned offset) +{ + u32 reg; + unsigned int bank_num, bank_pin_num; + struct zynq_gpio_privdata *priv = dev_get_priv(dev); + + if (check_gpio(offset, dev) < 0) + return -1; + + zynq_gpio_get_bank_pin(offset, &bank_num, &bank_pin_num, dev); + + /* set the GPIO pin as output */ + reg = readl(priv->base + ZYNQ_GPIO_DIRM_OFFSET(bank_num)); + reg &= BIT(bank_pin_num); + if (reg) + return GPIOF_OUTPUT; + else + return GPIOF_INPUT; +} + static const struct dm_gpio_ops gpio_zynq_ops = { .direction_input = zynq_gpio_direction_input, .direction_output = zynq_gpio_direction_output, .get_value = zynq_gpio_get_value, .set_value = zynq_gpio_set_value, + .get_function = zynq_gpio_get_function, + }; static const struct udevice_id zynq_gpio_ids[] = { |