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| author | Michal Simek <michal.simek@xilinx.com> | 2016-03-04 15:56:50 +0100 |
|---|---|---|
| committer | Michal Simek <michal.simek@xilinx.com> | 2016-05-24 11:15:00 +0200 |
| commit | a6b9587bad47749118229da32c7cc3c25a16d962 (patch) | |
| tree | b468ab357317ac8e8ed07874d1d58f038d74d70a /drivers/gpio/zynq_gpio.c | |
| parent | 7f307d93ed147fc831425189463d92e50d5c7566 (diff) | |
| download | u-boot-a6b9587bad47749118229da32c7cc3c25a16d962.tar.gz u-boot-a6b9587bad47749118229da32c7cc3c25a16d962.tar.bz2 u-boot-a6b9587bad47749118229da32c7cc3c25a16d962.zip | |
gpio: zynq: Add support for reading gpio pin state
Add zynq_gpio_get_function() which return status on gpio pin.
This function enables gpio status command.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Diffstat (limited to 'drivers/gpio/zynq_gpio.c')
| -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 3a995f610c..4ab2356081 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[] = { |