pfc: rmobile: Add hook to configure pin as GPIO

Add hook into the PFC driver to allow the GPIO driver to toggle
GPSR registers into GPIO mode when GPIO is requested.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>

diff --git a/drivers/pinctrl/renesas/pfc.c b/drivers/pinctrl/renesas/pfc.c
index b7b74985a34bd3b02dc63d7ab9b95db3f80298f7..6670072504535c81608586dcce0af9623b7c3d0c 100644 (file)
--- a/drivers/pinctrl/renesas/pfc.c
+++ b/drivers/pinctrl/renesas/pfc.c
@@ -448,6 +448,35 @@ 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)
+{
+       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];
+
+       if (cfg->type != PINMUX_TYPE_NONE)
+               return -EBUSY;
+
+       return sh_pfc_config_mux(pfc, pin->enum_id, PINMUX_TYPE_GPIO);
+}
+
 static int sh_pfc_pinctrl_pin_set(struct udevice *dev, unsigned pin_selector,
                                  unsigned func_selector)
 {

diff --git a/drivers/pinctrl/renesas/sh_pfc.h b/drivers/pinctrl/renesas/sh_pfc.h
index 7aef2d360b26bcd13f7bbb0bf21833c5fa13ed16..f82417b1a342b7901efd8cfe4b75893e477a545c 100644 (file)
--- a/drivers/pinctrl/renesas/sh_pfc.h
+++ b/drivers/pinctrl/renesas/sh_pfc.h
@@ -243,6 +243,7 @@ void sh_pfc_write_reg(struct sh_pfc *pfc, u32 reg, unsigned int width, u32 data)
 const struct sh_pfc_bias_info *
 sh_pfc_pin_to_bias_info(const struct sh_pfc_bias_info *info,
                        unsigned int num, unsigned int pin);
+int sh_pfc_config_mux_for_gpio(struct udevice *dev, unsigned pin_selector);
 
 extern const struct sh_pfc_soc_info r8a7795_pinmux_info;
 extern const struct sh_pfc_soc_info r8a7796_pinmux_info;