gpio: stmfx: add ops set_dir_flag

Manage the flags for GPIO configuration:
- open_drain, push_pull
- pull_up, pull_down

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@st.com>

diff --git a/drivers/pinctrl/pinctrl-stmfx.c b/drivers/pinctrl/pinctrl-stmfx.c
index 5d15424b845c69f7dc2aae49a6ac1d073967c40a..88df9e61a7375bf19fd02f6e056659d2d0546982 100644 (file)
--- a/drivers/pinctrl/pinctrl-stmfx.c
+++ b/drivers/pinctrl/pinctrl-stmfx.c
@@ -153,6 +153,42 @@ static int stmfx_gpio_direction_output(struct udevice *dev,
        return stmfx_write_reg(dev, STMFX_REG_GPIO_DIR, offset, 1);
 }
 
+static int stmfx_gpio_set_dir_flags(struct udevice *dev, unsigned int offset,
+                                   ulong flags)
+{
+       int ret = -ENOTSUPP;
+
+       if (flags & GPIOD_IS_OUT) {
+               if (flags & GPIOD_OPEN_SOURCE)
+                       return -ENOTSUPP;
+               if (flags & GPIOD_OPEN_DRAIN)
+                       ret = stmfx_conf_set_type(dev, offset, 0);
+               else /* PUSH-PULL */
+                       ret = stmfx_conf_set_type(dev, offset, 1);
+               if (ret)
+                       return ret;
+               ret = stmfx_gpio_direction_output(dev, offset,
+                                                 GPIOD_FLAGS_OUTPUT(flags));
+       } else if (flags & GPIOD_IS_IN) {
+               ret = stmfx_gpio_direction_input(dev, offset);
+               if (ret)
+                       return ret;
+               if (flags & GPIOD_PULL_UP) {
+                       ret = stmfx_conf_set_type(dev, offset, 1);
+                       if (ret)
+                               return ret;
+                       ret = stmfx_conf_set_pupd(dev, offset, 1);
+               } else if (flags & GPIOD_PULL_DOWN) {
+                       ret = stmfx_conf_set_type(dev, offset, 1);
+                       if (ret)
+                               return ret;
+                       ret = stmfx_conf_set_pupd(dev, offset, 0);
+               }
+       }
+
+       return ret;
+}
+
 static int stmfx_gpio_probe(struct udevice *dev)
 {
        struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
@@ -181,6 +217,7 @@ static const struct dm_gpio_ops stmfx_gpio_ops = {
        .get_function = stmfx_gpio_get_function,
        .direction_input = stmfx_gpio_direction_input,
        .direction_output = stmfx_gpio_direction_output,
+       .set_dir_flags = stmfx_gpio_set_dir_flags,
 };
 
 U_BOOT_DRIVER(stmfx_gpio) = {