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 3599cc525486be6681640ff3083376c001264c61 ]
1.Refine mtk_pinconf_get(): Use only one occurrence of return at end of this function.
2.Refine mtk_pinconf_set(): 2.1 Use only one occurrence of return at end of this function. 2.2 Modify case of PIN_CONFIG_INPUT_ENABLE - 2.2.1 Regard all non-zero setting value as enable, instead of always enable. 2.2.2 Remove check of ies_present flag and always invoke mtk_hw_set_value() since mtk_hw_pin_field_lookup() invoked inside mtk_hw_set_value() has the same effect of checking if ies control is supported. [The rationale is that: available of a control is always checked in mtk_hw_pin_field_lookup() and no need to add ies_present flag specially for ies control.] 2.3 Simply code logic for case of PIN_CONFIG_INPUT_SCHMITT. 2.4 Add case for PIN_CONFIG_INPUT_SCHMITT_ENABLE and process it with the same code for case of PIN_CONFIG_INPUT_SCHMITT.
Signed-off-by: Light Hsieh light.hsieh@mediatek.com Link: https://lore.kernel.org/r/1579675994-7001-3-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-mt6765.c | 1 - drivers/pinctrl/mediatek/pinctrl-mt8183.c | 1 - drivers/pinctrl/mediatek/pinctrl-paris.c | 171 ++++++++-------------- 3 files changed, 65 insertions(+), 108 deletions(-)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mt6765.c b/drivers/pinctrl/mediatek/pinctrl-mt6765.c index 12122646bbc28..7fae397fe27c1 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mt6765.c +++ b/drivers/pinctrl/mediatek/pinctrl-mt6765.c @@ -1070,7 +1070,6 @@ static const struct mtk_pin_soc mt6765_data = { .ngrps = ARRAY_SIZE(mtk_pins_mt6765), .eint_hw = &mt6765_eint_hw, .gpio_m = 0, - .ies_present = true, .base_names = mt6765_pinctrl_register_base_names, .nbase_names = ARRAY_SIZE(mt6765_pinctrl_register_base_names), .bias_disable_set = mtk_pinconf_bias_disable_set, diff --git a/drivers/pinctrl/mediatek/pinctrl-mt8183.c b/drivers/pinctrl/mediatek/pinctrl-mt8183.c index 9a74d5025be64..4eca81864a965 100644 --- a/drivers/pinctrl/mediatek/pinctrl-mt8183.c +++ b/drivers/pinctrl/mediatek/pinctrl-mt8183.c @@ -554,7 +554,6 @@ static const struct mtk_pin_soc mt8183_data = { .ngrps = ARRAY_SIZE(mtk_pins_mt8183), .eint_hw = &mt8183_eint_hw, .gpio_m = 0, - .ies_present = true, .base_names = mt8183_pinctrl_register_base_names, .nbase_names = ARRAY_SIZE(mt8183_pinctrl_register_base_names), .bias_disable_set = mtk_pinconf_bias_disable_set_rev1, diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c index 93fa44504bdd7..5ee49da18b3de 100644 --- a/drivers/pinctrl/mediatek/pinctrl-paris.c +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c @@ -81,37 +81,30 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev, int val, val2, err, reg, ret = 1; const struct mtk_pin_desc *desc;
- if (pin >= hw->soc->npins) - return -EINVAL; + if (pin >= hw->soc->npins) { + err = -EINVAL; + goto out; + } desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
switch (param) { case PIN_CONFIG_BIAS_DISABLE: - if (hw->soc->bias_disable_get) { + if (hw->soc->bias_disable_get) err = hw->soc->bias_disable_get(hw, desc, &ret); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case PIN_CONFIG_BIAS_PULL_UP: - if (hw->soc->bias_get) { + if (hw->soc->bias_get) err = hw->soc->bias_get(hw, desc, 1, &ret); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case PIN_CONFIG_BIAS_PULL_DOWN: - if (hw->soc->bias_get) { + if (hw->soc->bias_get) err = hw->soc->bias_get(hw, desc, 0, &ret); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case PIN_CONFIG_SLEW_RATE: err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &val); @@ -126,12 +119,16 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev, case PIN_CONFIG_OUTPUT_ENABLE: err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val); if (err) - return err; - - /* HW takes input mode as zero; output mode as non-zero */ - if ((val && param == PIN_CONFIG_INPUT_ENABLE) || - (!val && param == PIN_CONFIG_OUTPUT_ENABLE)) - return -EINVAL; + goto out; + /* CONFIG Current direction return value + * ------------- ----------------- ---------------------- + * OUTPUT_ENABLE output 1 (= HW value) + * input 0 (= HW value) + * INPUT_ENABLE output 0 (= reverse HW value) + * input 1 (= reverse HW value) + */ + if (param == PIN_CONFIG_INPUT_ENABLE) + val = !val;
break; case PIN_CONFIG_INPUT_SCHMITT_ENABLE: @@ -148,13 +145,10 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
break; case PIN_CONFIG_DRIVE_STRENGTH: - if (hw->soc->drive_get) { + if (hw->soc->drive_get) err = hw->soc->drive_get(hw, desc, &ret); - if (err) - return err; - } else { + else err = -ENOTSUPP; - } break; case MTK_PIN_CONFIG_TDSEL: case MTK_PIN_CONFIG_RDSEL: @@ -175,28 +169,24 @@ static int mtk_pinconf_get(struct pinctrl_dev *pctldev,
pullup = param == MTK_PIN_CONFIG_PU_ADV; err = hw->soc->adv_pull_get(hw, desc, pullup, &ret); - if (err) - return err; - } else { - return -ENOTSUPP; - } + } else + err = -ENOTSUPP; break; case MTK_PIN_CONFIG_DRV_ADV: - if (hw->soc->adv_drive_get) { + if (hw->soc->adv_drive_get) err = hw->soc->adv_drive_get(hw, desc, &ret); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; default: - return -ENOTSUPP; + err = -ENOTSUPP; }
- *config = pinconf_to_config_packed(param, ret); +out: + if (!err) + *config = pinconf_to_config_packed(param, ret);
- return 0; + return err; }
static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, @@ -215,60 +205,47 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
switch ((u32)param) { case PIN_CONFIG_BIAS_DISABLE: - if (hw->soc->bias_disable_set) { + if (hw->soc->bias_disable_set) err = hw->soc->bias_disable_set(hw, desc); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case PIN_CONFIG_BIAS_PULL_UP: - if (hw->soc->bias_set) { + if (hw->soc->bias_set) err = hw->soc->bias_set(hw, desc, 1); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case PIN_CONFIG_BIAS_PULL_DOWN: - if (hw->soc->bias_set) { + if (hw->soc->bias_set) err = hw->soc->bias_set(hw, desc, 0); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case PIN_CONFIG_OUTPUT_ENABLE: err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, MTK_DISABLE); - if (err) + /* Keep set direction to consider the case that a GPIO pin + * does not have SMT control + */ + if (err != -ENOTSUPP) goto err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_OUTPUT); - if (err) - goto err; break; case PIN_CONFIG_INPUT_ENABLE: - if (hw->soc->ies_present) { - mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, - MTK_ENABLE); - } + /* regard all non-zero value as enable */ + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg); + if (err) + goto err;
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, MTK_INPUT); - if (err) - goto err; break; case PIN_CONFIG_SLEW_RATE: - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, - arg); - if (err) - goto err; - + /* regard all non-zero value as enable */ + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SR, !!arg); break; case PIN_CONFIG_OUTPUT: err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, @@ -278,41 +255,29 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin,
err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, arg); - if (err) - goto err; break; + case PIN_CONFIG_INPUT_SCHMITT: case PIN_CONFIG_INPUT_SCHMITT_ENABLE: /* arg = 1: Input mode & SMT enable ; * arg = 0: Output mode & SMT disable */ - arg = arg ? 2 : 1; - err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, - arg & 1); + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR, !arg); if (err) goto err;
- err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, - !!(arg & 2)); - if (err) - goto err; + err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_SMT, !!arg); break; case PIN_CONFIG_DRIVE_STRENGTH: - if (hw->soc->drive_set) { + if (hw->soc->drive_set) err = hw->soc->drive_set(hw, desc, arg); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; case MTK_PIN_CONFIG_TDSEL: case MTK_PIN_CONFIG_RDSEL: reg = (param == MTK_PIN_CONFIG_TDSEL) ? PINCTRL_PIN_REG_TDSEL : PINCTRL_PIN_REG_RDSEL; - err = mtk_hw_set_value(hw, desc, reg, arg); - if (err) - goto err; break; case MTK_PIN_CONFIG_PU_ADV: case MTK_PIN_CONFIG_PD_ADV: @@ -322,20 +287,14 @@ static int mtk_pinconf_set(struct pinctrl_dev *pctldev, unsigned int pin, pullup = param == MTK_PIN_CONFIG_PU_ADV; err = hw->soc->adv_pull_set(hw, desc, pullup, arg); - if (err) - return err; - } else { - return -ENOTSUPP; - } + } else + err = -ENOTSUPP; break; case MTK_PIN_CONFIG_DRV_ADV: - if (hw->soc->adv_drive_set) { + if (hw->soc->adv_drive_set) err = hw->soc->adv_drive_set(hw, desc, arg); - if (err) - return err; - } else { - return -ENOTSUPP; - } + else + err = -ENOTSUPP; break; default: err = -ENOTSUPP;