From cad732499ba1aef2ea9288b30428465793b2d013 Mon Sep 17 00:00:00 2001 From: Patrice Chotard Date: Wed, 24 Oct 2018 14:10:21 +0200 Subject: [PATCH] gpio: stm32f7: Add ops get_function This patch adds gpio get_function ops support. This function reports the state of a gpio. Signed-off-by: Christophe Kerello Reviewed-by: Simon Glass Signed-off-by: Patrice Chotard --- drivers/gpio/stm32f7_gpio.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) diff --git a/drivers/gpio/stm32f7_gpio.c b/drivers/gpio/stm32f7_gpio.c index b903dc46b3..a690c437eb 100644 --- a/drivers/gpio/stm32f7_gpio.c +++ b/drivers/gpio/stm32f7_gpio.c @@ -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(®s->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) -- 2.25.1