From f6e545a73f8842400f76de4b185b31bea782ff85 Mon Sep 17 00:00:00 2001
From: Marek Vasut <marek.vasut+renesas@gmail.com>
Date: Sun, 26 Nov 2017 18:07:29 +0100
Subject: [PATCH] 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>
---
drivers/pinctrl/renesas/pfc.c | 29 +++++++++++++++++++++++++++++
drivers/pinctrl/renesas/sh_pfc.h | 1 +
2 files changed, 30 insertions(+)
diff --git a/drivers/pinctrl/renesas/pfc.c b/drivers/pinctrl/renesas/pfc.c
index b7b74985a3..6670072504 100644
--- 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 7aef2d360b..f82417b1a3 100644
--- 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;
--
2.39.5