diff options
| -rw-r--r-- | drivers/pinctrl/sh-pfc/pinctrl.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/pinctrl/sh-pfc/pinctrl.c b/drivers/pinctrl/sh-pfc/pinctrl.c index 52179bbcf6b4..aef268bc17ba 100644 --- a/drivers/pinctrl/sh-pfc/pinctrl.c +++ b/drivers/pinctrl/sh-pfc/pinctrl.c @@ -218,8 +218,18 @@ static int sh_pfc_gpio_set_direction(struct pinctrl_dev *pctldev, const struct sh_pfc_pin *pin = &pfc->info->pins[idx]; struct sh_pfc_pin_config *cfg = &pmx->configs[idx]; unsigned long flags; + unsigned int dir; int ret; + /* Check if the requested direction is supported by the pin. Not all SoC + * provide pin config data, so perform the check conditionally. + */ + if (pin->configs) { + dir = input ? SH_PFC_PIN_CFG_INPUT : SH_PFC_PIN_CFG_OUTPUT; + if (!(pin->configs & dir)) + return -EINVAL; + } + spin_lock_irqsave(&pfc->lock, flags); ret = sh_pfc_config_mux(pfc, pin->enum_id, new_type); |