[v2,3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set()
diff mbox series

Message ID 1567662796-25508-3-git-send-email-light.hsieh@mediatek.com
State New
Headers show
Series
  • [v2,1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()
Related show

Commit Message

Light Hsieh Sept. 5, 2019, 5:53 a.m. UTC
From: Light Hsieh <light.hsieh@mediatek.com>

1.Refine mtk_pinconf_get():
1.1 Use only one occurrence of return at end of this function.
1.2 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.

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 -
    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.

---
 drivers/pinctrl/mediatek/pinctrl-mt6765.c |   1 -
 drivers/pinctrl/mediatek/pinctrl-paris.c  | 204 +++++++++++-------------------
 2 files changed, 75 insertions(+), 130 deletions(-)

Comments

Linus Walleij Sept. 13, 2019, 12:39 p.m. UTC | #1
On Thu, Sep 5, 2019 at 7:53 AM Light Hsieh <light.hsieh@mediatek.com> wrote:

> From: Light Hsieh <light.hsieh@mediatek.com>
>
> 1.Refine mtk_pinconf_get():
(...)
> 2.Refine mtk_pinconf_set():

This explodes on the build servers and it's because of this:

> @@ -78,93 +78,75 @@ 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;

Deletes "val" and "val2"

>         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_get_value(hw, desc, reg, &val);
> -               if (err)
> -                       return err;
> -
> -               ret = val;
> -

Updates a bit, but look on the reg = line:
"val" is still used.

This patch can not have been properly compile tested.

Please rebase on latest "devel" branch from pinctrl, fix up the problems
and resubmit the entire series after making sure it compiles and works.

Yours,
Linus Walleij

Patch
diff mbox series

diff --git a/drivers/pinctrl/mediatek/pinctrl-mt6765.c b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
index e024ebc..bada37f 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt6765.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
@@ -1070,7 +1070,6 @@ 
 	.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-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 71c94b2..bbe3f8a 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -78,93 +78,75 @@  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;
 
 	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);
-		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)
-			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)
+			ret = !ret;
 
 		break;
 	case PIN_CONFIG_INPUT_SCHMITT_ENABLE:
-		err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &val);
-		if (err)
-			return err;
-
-		err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SMT, &val2);
+		err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &ret);
 		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:
-		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:
 		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;
-
 		break;
 	case MTK_PIN_CONFIG_PU_ADV:
 	case MTK_PIN_CONFIG_PD_ADV:
@@ -173,28 +155,24 @@  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,
@@ -210,60 +188,46 @@  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 if SMT is not supported on this pin */
+		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 */
+		mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_IES, !!arg);
 
-		err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
-				       MTK_INPUT);
 		if (err)
 			goto err;
+
+		err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DIR,
+				       MTK_INPUT);
 		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,
@@ -273,41 +237,29 @@  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 = 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:
@@ -317,20 +269,14 @@  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;
@@ -946,6 +892,7 @@  int mtk_paris_pinctrl_probe(struct platform_device *pdev,
 	return 0;
 }
 
+
 static int mtk_paris_pinctrl_suspend(struct device *device)
 {
 	struct mtk_pinctrl *pctl = dev_get_drvdata(device);
@@ -964,4 +911,3 @@  static int mtk_paris_pinctrl_resume(struct device *device)
 	.suspend_noirq = mtk_paris_pinctrl_suspend,
 	.resume_noirq = mtk_paris_pinctrl_resume,
 };
-