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pfc: rmobile: Add hook to configure pin as GPIO

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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>
This commit is contained in:
Marek Vasut 2017-11-26 18:07:29 +01:00
parent 2489bb54a5
commit f6e545a73f
2 changed files with 30 additions and 0 deletions
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29
drivers/pinctrl/renesas/pfc.c
View file

@ -448,6 +448,35 @@ static const char *sh_pfc_pinctrl_get_function_name(struct udevice *dev,
return priv->pfc.info->functions[selector].name; 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, static int sh_pfc_pinctrl_pin_set(struct udevice *dev, unsigned pin_selector,
unsigned func_selector) unsigned func_selector)
{ {

1
drivers/pinctrl/renesas/sh_pfc.h
View file

@ -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 * const struct sh_pfc_bias_info *
sh_pfc_pin_to_bias_info(const struct sh_pfc_bias_info *info, sh_pfc_pin_to_bias_info(const struct sh_pfc_bias_info *info,
unsigned int num, unsigned int pin); 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 r8a7795_pinmux_info;
extern const struct sh_pfc_soc_info r8a7796_pinmux_info; extern const struct sh_pfc_soc_info r8a7796_pinmux_info;