5.4-stable review patch. If anyone has any objections, please let me know.
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From: Light Hsieh light.hsieh@mediatek.com
[ Upstream commit 1bea6afbc84206cd939ae227cf81d6c824af6fd7 ]
Correct cases for PIN_CONFIG_SLEW_RATE, PIN_CONFIG_INPUT_SCHMITT_ENABLE, and PIN_CONFIG_OUTPUT_ENABLE - Use variable ret to receive value in mtk_hw_get_value() (instead of variable val) since pinconf_to_config_packed() at end of this function use variable ret to pack config value.
Signed-off-by: Light Hsieh light.hsieh@mediatek.com Link: https://lore.kernel.org/r/1579675994-7001-4-git-send-email-light.hsieh@media... Acked-by: Sean Wang sean.wang@kernel.org Signed-off-by: Linus Walleij linus.walleij@linaro.org Stable-dep-of: c5d3b64c568a ("pinctrl: mediatek: paris: Rework support for PIN_CONFIG_{INPUT,OUTPUT}_ENABLE") Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/pinctrl/mediatek/pinctrl-paris.c | 40 +++++++++--------------- 1 file changed, 15 insertions(+), 25 deletions(-)
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c index 5ee49da18b3de..9bd62c22128f2 100644 --- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -78,7 +78,7 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev, { struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev); u32 param = pinconf_to_config_param(*config); - int val, val2, err, reg, ret = 1; + int err, reg, ret = 1; const struct mtk_pin_desc *desc;
if (pin >= hw->soc->npins) { @@ -107,17 +107,11 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev, err = -ENOTSUPP; break; case PIN_CONFIG_SLEW_RATE: - err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &val); - if (err) - return err; - - if (!val) - return -EINVAL; - + err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret); break; case PIN_CONFIG_INPUT_ENABLE: case PIN_CONFIG_OUTPUT_ENABLE: - err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val); + err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); if (err) goto out; /* CONFIG Current direction return value @@ -128,20 +122,22 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev, * input 1 (= reverse HW value) */ if (param == PIN_CONFIG_INPUT_ENABLE) - val = !val; + ret = !ret;
break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: - err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val); + err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret); if (err) - return err; - - err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &val2); - if (err) - return err; + goto out; + /* return error when in output mode + * because schmitt trigger only work in input mode + */ + if (ret) { + err = -EINVAL; + goto out; + }
- if (val || !val2) - return -EINVAL; + err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &ret);
break; case PIN_CONFIG_DRIVE_STRENGTH: @@ -154,13 +150,7 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev, case MTK_PIN_CONFIG_RDSEL: reg = (param == MTK_PIN_CONFIG_TDSEL) ? PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; - - err = mtk_hw_get_value(hw, desc, reg, &val); - if (err) - return err; - - ret = val; - + err = mtk_hw_get_value(hw, desc, reg, &ret); break; case MTK_PIN_CONFIG_PU_ADV: case MTK_PIN_CONFIG_PD_ADV: