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gpio: stm32f7: Add ops get_function

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This patch adds gpio get_function ops support.
This function reports the state of a gpio.

Signed-off-by: Christophe Kerello <christophe.kerello@st.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
This commit is contained in:
Patrice Chotard 2018-10-24 14:10:21 +02:00 committed by Tom Rini
parent b42d938c24
commit cad732499b
1 changed files with 20 additions and 0 deletions
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20
drivers/gpio/stm32f7_gpio.c
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@ -65,11 +65,31 @@ static int stm32_gpio_set_value(struct udevice *dev, unsigned offset, int value)
return 0;
}
static int stm32_gpio_get_function(struct udevice *dev, unsigned int offset)
{
struct stm32_gpio_priv *priv = dev_get_priv(dev);
struct stm32_gpio_regs *regs = priv->regs;
int bits_index = MODE_BITS(offset);
int mask = MODE_BITS_MASK << bits_index;
u32 mode;
mode = (readl(&regs->moder) & mask) >> bits_index;
if (mode == STM32_GPIO_MODE_OUT)
return GPIOF_OUTPUT;
if (mode == STM32_GPIO_MODE_IN)
return GPIOF_INPUT;
if (mode == STM32_GPIO_MODE_AN)
return GPIOF_UNUSED;
return GPIOF_FUNC;
}
static const struct dm_gpio_ops gpio_stm32_ops = {
.direction_input = stm32_gpio_direction_input,
.direction_output = stm32_gpio_direction_output,
.get_value = stm32_gpio_get_value,
.set_value = stm32_gpio_set_value,
.get_function = stm32_gpio_get_function,
};
static int gpio_stm32_probe(struct udevice *dev)