From f6e545a73f8842400f76de4b185b31bea782ff85 Mon Sep 17 00:00:00 2001 From: Marek Vasut Date: Sun, 26 Nov 2017 18:07:29 +0100 Subject: 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 Cc: Nobuhiro Iwamatsu --- drivers/pinctrl/renesas/pfc.c | 29 +++++++++++++++++++++++++++++ drivers/pinctrl/renesas/sh_pfc.h | 1 + 2 files changed, 30 insertions(+) (limited to 'drivers') diff --git a/drivers/pinctrl/renesas/pfc.c b/drivers/pinctrl/renesas/pfc.c index b7b74985a34..66700725045 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 7aef2d360b2..f82417b1a34 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; -- cgit v1.2.3