gpio: stmfx: add ops get_dir_flags

Add support of ops get_dir_flags() to read dir flags from
STMFX registers.

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 88df9e61a7375bf19fd02f6e056659d2d0546982..1d326ecf17a5c7d8ed81d9fddb3b3d2aa5b67eb7 100644 (file)
--- a/drivers/pinctrl/pinctrl-stmfx.c
+++ b/drivers/pinctrl/pinctrl-stmfx.c
@@ -108,12 +108,22 @@ static int stmfx_conf_set_pupd(struct udevice *dev, unsigned int offset,
        return stmfx_write_reg(dev, STMFX_REG_GPIO_PUPD, offset, pupd);
 }
 
+static int stmfx_conf_get_pupd(struct udevice *dev, unsigned int offset)
+{
+       return stmfx_read_reg(dev, STMFX_REG_GPIO_PUPD, offset);
+}
+
 static int stmfx_conf_set_type(struct udevice *dev, unsigned int offset,
                               uint type)
 {
        return stmfx_write_reg(dev, STMFX_REG_GPIO_TYPE, offset, type);
 }
 
+static int stmfx_conf_get_type(struct udevice *dev, unsigned int offset)
+{
+       return stmfx_read_reg(dev, STMFX_REG_GPIO_TYPE, offset);
+}
+
 static int stmfx_gpio_get(struct udevice *dev, unsigned int offset)
 {
        return stmfx_read_reg(dev, STMFX_REG_GPIO_STATE, offset);
@@ -189,6 +199,45 @@ static int stmfx_gpio_set_dir_flags(struct udevice *dev, unsigned int offset,
        return ret;
 }
 
+static int stmfx_gpio_get_dir_flags(struct udevice *dev, unsigned int offset,
+                                   ulong *flags)
+{
+       ulong dir_flags = 0;
+       int ret;
+
+       if (stmfx_gpio_get_function(dev, offset) == GPIOF_OUTPUT) {
+               dir_flags |= GPIOD_IS_OUT;
+               ret = stmfx_conf_get_type(dev, offset);
+               if (ret < 0)
+                       return ret;
+               if (ret == 0)
+                       dir_flags |= GPIOD_OPEN_DRAIN;
+                       /* 1 = push-pull (default), open source not supported */
+               ret = stmfx_gpio_get(dev, offset);
+               if (ret < 0)
+                       return ret;
+               if (ret)
+                       dir_flags |= GPIOD_IS_OUT_ACTIVE;
+       } else {
+               dir_flags |= GPIOD_IS_IN;
+               ret = stmfx_conf_get_type(dev, offset);
+               if (ret < 0)
+                       return ret;
+               if (ret == 1) {
+                       ret = stmfx_conf_get_pupd(dev, offset);
+                       if (ret < 0)
+                               return ret;
+                       if (ret == 1)
+                               dir_flags |= GPIOD_PULL_UP;
+                       else
+                               dir_flags |= GPIOD_PULL_DOWN;
+               }
+       }
+       *flags = dir_flags;
+
+       return 0;
+}
+
 static int stmfx_gpio_probe(struct udevice *dev)
 {
        struct gpio_dev_priv *uc_priv = dev_get_uclass_priv(dev);
@@ -218,6 +267,7 @@ static const struct dm_gpio_ops stmfx_gpio_ops = {
        .direction_input = stmfx_gpio_direction_input,
        .direction_output = stmfx_gpio_direction_output,
        .set_dir_flags = stmfx_gpio_set_dir_flags,
+       .get_dir_flags = stmfx_gpio_get_dir_flags,
 };
 
 U_BOOT_DRIVER(stmfx_gpio) = {