pinctrl: renesas: Implement gpio_request_enable/gpio_disable_free

Implement the gpio_request_enable/gpio_disable_free callbacks to let
the GPIO driver call the pin control framework and let it reconfigure
pins as GPIOs.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Alex Kiernan <alex.kiernan@gmail.com>
Cc: Christoph Muellner <christoph.muellner@theobroma-systems.com>
Cc: Eugeniu Rosca <roscaeugeniu@gmail.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Cc: Patrick DELAUNAY <patrick.delaunay@st.com>
Cc: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Cc: Simon Glass <sjg@chromium.org>

diff --git a/drivers/pinctrl/renesas/pfc.c b/drivers/pinctrl/renesas/pfc.c
index 59dc4af..52c486e 100644 (file)
--- a/drivers/pinctrl/renesas/pfc.c
+++ b/drivers/pinctrl/renesas/pfc.c
@@ -459,7 +459,8 @@ static const char *sh_pfc_pinctrl_get_function_name(struct udevice *dev,
        return priv->pfc.info->functions[selector].name;
 }
 
-int sh_pfc_config_mux_for_gpio(struct udevice *dev, unsigned pin_selector)
+static int sh_pfc_gpio_request_enable(struct udevice *dev,
+                                     unsigned pin_selector)
 {
        struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
        struct sh_pfc_pinctrl *pmx = &priv->pmx;
@@ -494,6 +495,40 @@ int sh_pfc_config_mux_for_gpio(struct udevice *dev, unsigned pin_selector)
        return 0;
 }
 
+static int sh_pfc_gpio_disable_free(struct udevice *dev,
+                                   unsigned pin_selector)
+{
+       struct sh_pfc_pinctrl_priv *priv = dev_get_priv(dev);
+       struct sh_pfc_pinctrl *pmx = &priv->pmx;
+       struct sh_pfc *pfc = &priv->pfc;
+       struct sh_pfc_pin_config *cfg;
+       const struct sh_pfc_pin *pin = NULL;
+       int i, idx;
+
+       for (i = 1; i < pfc->info->nr_pins; i++) {
+               if (priv->pfc.info->pins[i].pin != pin_selector)
+                       continue;
+
+               pin = &priv->pfc.info->pins[i];
+               break;
+       }
+
+       if (!pin)
+               return -EINVAL;
+
+       idx = sh_pfc_get_pin_index(pfc, pin->pin);
+       cfg = &pmx->configs[idx];
+
+       cfg->type = PINMUX_TYPE_NONE;
+
+       return 0;
+}
+
+int sh_pfc_config_mux_for_gpio(struct udevice *dev, unsigned pin_selector)
+{
+       return sh_pfc_gpio_request_enable(dev, pin_selector);
+}
+
 static int sh_pfc_pinctrl_pin_set(struct udevice *dev, unsigned pin_selector,
                                  unsigned func_selector)
 {
@@ -752,6 +787,9 @@ static struct pinctrl_ops sh_pfc_pinctrl_ops = {
        .pinmux_set             = sh_pfc_pinctrl_pin_set,
        .pinmux_group_set       = sh_pfc_pinctrl_group_set,
        .set_state              = pinctrl_generic_set_state,
+
+       .gpio_request_enable    = sh_pfc_gpio_request_enable,
+       .gpio_disable_free      = sh_pfc_gpio_disable_free,
 };
 
 static int sh_pfc_map_pins(struct sh_pfc *pfc, struct sh_pfc_pinctrl *pmx)