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* [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary  search in mtk_hw_pin_field_lookup()
@ 2019-09-05  5:53 Light Hsieh
  2019-09-05  5:53 ` [PATCH v2 2/5] pinctrl: mediatek: Supporting driving setting without mapping current to register value Light Hsieh
                   ` (4 more replies)
  0 siblings, 5 replies; 11+ messages in thread
From: Light Hsieh @ 2019-09-05  5:53 UTC (permalink / raw)
  To: linus.walleij
  Cc: linux-mediatek, linux-gpio, linux-kernel, sean.wang, Light Hsieh

From: Light Hsieh <light.hsieh@mediatek.com>

1. Check if gpio pin number is in valid range to prevent from get invalid
   pointer 'desc' in the following code:
	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];

2. Use binary search in mtk_hw_pin_field_lookup()
   Modify mtk_hw_pin_field_lookup() to use binary search for accelerating
   search.

---
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 24 +++++++++++++++++++-----
 drivers/pinctrl/mediatek/pinctrl-paris.c         | 19 +++++++++++++++++++
 2 files changed, 38 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 20e1c89..4687f63 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -68,7 +68,7 @@ static int mtk_hw_pin_field_lookup(struct mtk_pinctrl *hw,
 {
 	const struct mtk_pin_field_calc *c, *e;
 	const struct mtk_pin_reg_calc *rc;
-	u32 bits;
+	u32 bits, start = 0, end, found = 0, check;
 
 	if (hw->soc->reg_cal && hw->soc->reg_cal[field].range) {
 		rc = &hw->soc->reg_cal[field];
@@ -79,21 +79,32 @@ static int mtk_hw_pin_field_lookup(struct mtk_pinctrl *hw,
 		return -ENOTSUPP;
 	}
 
+	end = rc->nranges - 1;
 	c = rc->range;
 	e = c + rc->nranges;
 
-	while (c < e) {
-		if (desc->number >= c->s_pin && desc->number <= c->e_pin)
+	while (start <= end) {
+		check = (start + end) >> 1;
+		if (desc->number >= rc->range[check].s_pin
+		 && desc->number <= rc->range[check].e_pin) {
+			found = 1;
 			break;
-		c++;
+		} else if (start == end)
+			break;
+		else if (desc->number < rc->range[check].s_pin)
+			end = check - 1;
+		else
+			start = check + 1;
 	}
 
-	if (c >= e) {
+	if (!found) {
 		dev_dbg(hw->dev, "Not support field %d for pin = %d (%s)\n",
 			field, desc->number, desc->name);
 		return -ENOTSUPP;
 	}
 
+	c = rc->range + check;
+
 	if (c->i_base > hw->nbase - 1) {
 		dev_err(hw->dev,
 			"Invalid base for field %d for pin = %d (%s)\n",
@@ -182,6 +193,9 @@ int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 	if (err)
 		return err;
 
+	if (value < 0 || value > pf.mask)
+		return -EINVAL;
+
 	if (!pf.next)
 		mtk_rmw(hw, pf.index, pf.offset, pf.mask << pf.bitpos,
 			(value & pf.mask) << pf.bitpos);
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 923264d..28b4951 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -693,6 +693,9 @@ static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
 	const struct mtk_pin_desc *desc;
 	int value, err;
 
+	if (gpio > hw->soc->npins)
+		return -EINVAL;
+
 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 
 	err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);
@@ -708,6 +711,9 @@ static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
 	const struct mtk_pin_desc *desc;
 	int value, err;
 
+	if (gpio > hw->soc->npins)
+		return -EINVAL;
+
 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 
 	err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
@@ -722,6 +728,9 @@ static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
 	const struct mtk_pin_desc *desc;
 
+	if (gpio > hw->soc->npins)
+		return;
+
 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 
 	mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
@@ -729,12 +738,22 @@ static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
 
 static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
 {
+	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+
+	if (gpio > hw->soc->npins)
+		return -EINVAL;
+
 	return pinctrl_gpio_direction_input(chip->base + gpio);
 }
 
 static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
 				     int value)
 {
+	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
+
+	if (gpio > hw->soc->npins)
+		return -EINVAL;
+
 	mtk_gpio_set(chip, gpio, value);
 
 	return pinctrl_gpio_direction_output(chip->base + gpio);
-- 
1.8.1.1.dirty


^ permalink raw reply	[flat|nested] 11+ messages in thread

* [PATCH v2 2/5] pinctrl: mediatek: Supporting driving setting without  mapping current to register value
  2019-09-05  5:53 [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
@ 2019-09-05  5:53 ` Light Hsieh
  2019-09-05  5:53 ` [PATCH v2 3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set() Light Hsieh
                   ` (3 subsequent siblings)
  4 siblings, 0 replies; 11+ messages in thread
From: Light Hsieh @ 2019-09-05  5:53 UTC (permalink / raw)
  To: linus.walleij
  Cc: linux-mediatek, linux-gpio, linux-kernel, sean.wang, Light Hsieh

From: Light Hsieh <light.hsieh@mediatek.com>

Mediatek's smarphone project actual usage does need to know current value
(in mA) in procedure of finding the best driving setting.
The steps in the procedure is like as follow:

1. set driving setting field in setting register as 0, measure waveform,
   perform test, and etc.
2. set driving setting field in setting register as 1, measure waveform,
   perform test, and etc.
...
n. set driving setting field in setting register as n-1, measure
   waveform, perform test, and etc.
Check the results of steps 1~n and adopt the setting that get best result.

This procedure does need to know the mapping between current to register
value.
Therefore, setting driving without mapping current is more pratical for
Mediatek's smartphone usage.

---
 drivers/pinctrl/mediatek/pinctrl-mt6765.c        |  4 ++--
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 21 +++++++++++++++++++++
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h |  5 +++++
 drivers/pinctrl/mediatek/pinctrl-paris.c         |  1 +
 4 files changed, 29 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mt6765.c b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
index 32451e8..e024ebc 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt6765.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
@@ -1077,8 +1077,8 @@
 	.bias_disable_get = mtk_pinconf_bias_disable_get,
 	.bias_set = mtk_pinconf_bias_set,
 	.bias_get = mtk_pinconf_bias_get,
-	.drive_set = mtk_pinconf_drive_set_rev1,
-	.drive_get = mtk_pinconf_drive_get_rev1,
+	.drive_set = mtk_pinconf_drive_set_direct_val,
+	.drive_get = mtk_pinconf_drive_get_direct_val,
 	.adv_pull_get = mtk_pinconf_adv_pull_get,
 	.adv_pull_set = mtk_pinconf_adv_pull_set,
 };
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 4687f63..23a9529 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -607,6 +607,27 @@ int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
 	return 0;
 }
 
+/* Revision direct value */
+int mtk_pinconf_drive_set_direct_val(struct mtk_pinctrl *hw,
+			       const struct mtk_pin_desc *desc, u32 arg)
+{
+	int err;
+
+	err = mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DRV, arg);
+
+	return err;
+}
+
+int mtk_pinconf_drive_get_direct_val(struct mtk_pinctrl *hw,
+			       const struct mtk_pin_desc *desc, int *val)
+{
+	int err;
+
+	err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DRV, val);
+
+	return err;
+}
+
 int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
 			     const struct mtk_pin_desc *desc, bool pullup,
 			     u32 arg)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
index 1b7da42..b3bada0 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
@@ -288,6 +288,11 @@ int mtk_pinconf_drive_set_rev1(struct mtk_pinctrl *hw,
 int mtk_pinconf_drive_get_rev1(struct mtk_pinctrl *hw,
 			       const struct mtk_pin_desc *desc, int *val);
 
+int mtk_pinconf_drive_set_direct_val(struct mtk_pinctrl *hw,
+			       const struct mtk_pin_desc *desc, u32 arg);
+int mtk_pinconf_drive_get_direct_val(struct mtk_pinctrl *hw,
+			       const struct mtk_pin_desc *desc, int *val);
+
 int mtk_pinconf_adv_pull_set(struct mtk_pinctrl *hw,
 			     const struct mtk_pin_desc *desc, bool pullup,
 			     u32 arg);
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 28b4951..71c94b2 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -964,3 +964,4 @@ static int mtk_paris_pinctrl_resume(struct device *device)
 	.suspend_noirq = mtk_paris_pinctrl_suspend,
 	.resume_noirq = mtk_paris_pinctrl_resume,
 };
+
-- 
1.8.1.1.dirty


^ permalink raw reply	[flat|nested] 11+ messages in thread

* [PATCH v2 3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set()
  2019-09-05  5:53 [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
  2019-09-05  5:53 ` [PATCH v2 2/5] pinctrl: mediatek: Supporting driving setting without mapping current to register value Light Hsieh
@ 2019-09-05  5:53 ` Light Hsieh
  2019-09-13 12:39   ` Linus Walleij
  2019-09-05  5:53 ` [PATCH v2 4/5] pinctrl: mediatek: Backward compatible to previous Mediatek's bias-pull usage Light Hsieh
                   ` (2 subsequent siblings)
  4 siblings, 1 reply; 11+ messages in thread
From: Light Hsieh @ 2019-09-05  5:53 UTC (permalink / raw)
  To: linus.walleij
  Cc: linux-mediatek, linux-gpio, linux-kernel, sean.wang, Light Hsieh

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(-)

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,
 };
-
-- 
1.8.1.1.dirty


^ permalink raw reply	[flat|nested] 11+ messages in thread

* [PATCH v2 4/5] pinctrl: mediatek: Backward compatible to previous Mediatek's bias-pull usage
  2019-09-05  5:53 [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
  2019-09-05  5:53 ` [PATCH v2 2/5] pinctrl: mediatek: Supporting driving setting without mapping current to register value Light Hsieh
  2019-09-05  5:53 ` [PATCH v2 3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set() Light Hsieh
@ 2019-09-05  5:53 ` Light Hsieh
  2019-09-05  5:53 ` [PATCH v2 5/5] pinctrl: mediatek: Add support for pin configuration dump via debugfs Light Hsieh
  2019-09-05  6:00 ` [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
  4 siblings, 0 replies; 11+ messages in thread
From: Light Hsieh @ 2019-09-05  5:53 UTC (permalink / raw)
  To: linus.walleij
  Cc: linux-mediatek, linux-gpio, linux-kernel, sean.wang, Light Hsieh

From: Light Hsieh <light.hsieh@mediatek.com>

Refine mtk_pinconf_set()/mtk_pinconf_get() for backward compatibility to
previous Mediatek's bias-pull usage.
In PINCTRL_MTK that use pinctrl-mtk-common.c, bias-pull setting for pins
with 2 pull resistors can be specified as value for bias-pull-up and
bias-pull-down. For example:
    bias-pull-up = <MTK_PUPD_SET_R1R0_00>;
    bias-pull-up = <MTK_PUPD_SET_R1R0_01>;
    bias-pull-up = <MTK_PUPD_SET_R1R0_10>;
    bias-pull-up = <MTK_PUPD_SET_R1R0_11>;
    bias-pull-down = <MTK_PUPD_SET_R1R0_00>;
    bias-pull-down = <MTK_PUPD_SET_R1R0_01>;
    bias-pull-down = <MTK_PUPD_SET_R1R0_10>;
    bias-pull-down = <MTK_PUPD_SET_R1R0_11>;

On the other hand, PINCTRL_MTK_PARIS use customized properties
"mediatek,pull-up-adv" and "mediatek,pull-down-adv" to specify bias-pull
setting for pins with 2 pull resistors.
This introduce in-compatibility in device tree and increatse porting
effort to Mediatek's customer that had already used PINCTRL_MTK version.
Besides, if customers are not awared of this change and still write devicetree
for PINCTRL_MTK version, they may encounter runtime failure with pinctrl and
spent time to debug.

This patch add backward compatible to previous Mediatek's bias-pull usage
so that Mediatek's customer need not use a new devicetree property name.
The rationale is that: changing driver implemenation had better leave
interface unchanged.

---
 drivers/pinctrl/mediatek/pinctrl-mt6765.c        |   4 +-
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 285 +++++++++++++++++++++++
 drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h |  11 +
 drivers/pinctrl/mediatek/pinctrl-paris.c         |  49 ++--
 4 files changed, 327 insertions(+), 22 deletions(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-mt6765.c b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
index bada37f..315aebd 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mt6765.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mt6765.c
@@ -1074,8 +1074,8 @@
 	.nbase_names = ARRAY_SIZE(mt6765_pinctrl_register_base_names),
 	.bias_disable_set = mtk_pinconf_bias_disable_set,
 	.bias_disable_get = mtk_pinconf_bias_disable_get,
-	.bias_set = mtk_pinconf_bias_set,
-	.bias_get = mtk_pinconf_bias_get,
+	.bias_set = mtk_pinconf_bias_set_combo,
+	.bias_get = mtk_pinconf_bias_get_combo,
 	.drive_set = mtk_pinconf_drive_set_direct_val,
 	.drive_get = mtk_pinconf_drive_get_direct_val,
 	.adv_pull_get = mtk_pinconf_adv_pull_get,
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
index 23a9529..dab8418 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
@@ -13,6 +13,8 @@
 #include <linux/io.h>
 #include <linux/of_irq.h>
 
+#include <dt-bindings/pinctrl/mt65xx.h>
+
 #include "mtk-eint.h"
 #include "pinctrl-mtk-common-v2.h"
 
@@ -205,6 +207,20 @@ int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 	return 0;
 }
 
+void mtk_hw_set_value_no_lookup(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				int value, struct mtk_pin_field *pf)
+{
+	if (value < 0 || value > pf->mask)
+		return;
+
+	if (!pf->next)
+		mtk_rmw(hw, pf->index, pf->offset, pf->mask << pf->bitpos,
+			(value & pf->mask) << pf->bitpos);
+	else
+		mtk_hw_write_cross_field(hw, pf, value);
+}
+
 int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 		     int field, int *value)
 {
@@ -224,6 +240,17 @@ int mtk_hw_get_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
 	return 0;
 }
 
+void mtk_hw_get_value_no_lookup(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				int *value, struct mtk_pin_field *pf)
+{
+	if (!pf->next)
+		*value = (mtk_r32(hw, pf->index, pf->offset)
+			  >> pf->bitpos) & pf->mask;
+	else
+		mtk_hw_read_cross_field(hw, pf, value);
+}
+
 static int mtk_xt_find_eint_num(struct mtk_pinctrl *hw, unsigned long eint_n)
 {
 	const struct mtk_pin_desc *desc;
@@ -516,6 +543,264 @@ int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
 	return 0;
 }
 
+/* Combo for the following pull register type:
+ * 1. PU + PD
+ * 2. PULLSEL + PULLEN
+ * 3. PUPD + R0 + R1
+ */
+int mtk_pinconf_bias_set_pu_pd(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 pullup, u32 arg)
+{
+	struct mtk_pin_field pf;
+	int err = -EINVAL;
+	int pu, pd;
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PU, &pf);
+	if (err)
+		goto out;
+
+	if (arg == MTK_DISABLE) {
+		pu = 0;
+		pd = 0;
+	} else if ((arg == MTK_ENABLE) && pullup) {
+		pu = 1;
+		pd = 0;
+	} else if ((arg == MTK_ENABLE) && !pullup) {
+		pu = 0;
+		pd = 1;
+	} else {
+		goto out;
+	}
+
+	mtk_hw_set_value_no_lookup(hw, desc, pu, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PD, &pf);
+	if (err)
+		goto out;
+
+	mtk_hw_set_value_no_lookup(hw, desc, pd, &pf);
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_set_pullsel_pullen(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 pullup, u32 arg)
+{
+	struct mtk_pin_field pf;
+	int err = -EINVAL, enable;
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PULLEN, &pf);
+	if (err)
+		goto out;
+
+	if (arg == MTK_DISABLE)
+		enable = 0;
+	else if (arg == MTK_ENABLE)
+		enable = 1;
+	else
+		goto out;
+
+	mtk_hw_set_value_no_lookup(hw, desc, enable, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PULLSEL, &pf);
+	if (err)
+		goto out;
+	mtk_hw_set_value_no_lookup(hw, desc, pullup, &pf);
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_set_pupd_r1_r0(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 pullup, u32 arg)
+{
+	struct mtk_pin_field pf;
+	int err = -EINVAL;
+	int r0, r1;
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PUPD, &pf);
+	if (err)
+		goto out;
+
+	if ((arg == MTK_DISABLE) || (arg == MTK_PUPD_SET_R1R0_00)) {
+		pullup = 0;
+		r0 = 0;
+		r1 = 0;
+	} else if (arg == MTK_PUPD_SET_R1R0_01) {
+		r0 = 1;
+		r1 = 0;
+	} else if (arg == MTK_PUPD_SET_R1R0_10) {
+		r0 = 0;
+		r1 = 1;
+	} else if (arg == MTK_PUPD_SET_R1R0_11) {
+		r0 = 1;
+		r1 = 1;
+	} else
+		goto out;
+
+	/* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
+	mtk_hw_set_value_no_lookup(hw, desc, !pullup, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_R0, &pf);
+	if (err)
+		goto out;
+	mtk_hw_set_value_no_lookup(hw, desc, r0, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_R1, &pf);
+	if (err)
+		goto out;
+	mtk_hw_set_value_no_lookup(hw, desc, r1, &pf);
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_get_pu_pd(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 *pullup, u32 *enable)
+{
+	struct mtk_pin_field pf;
+	int err = -EINVAL;
+	int pu, pd;
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PU, &pf);
+	if (err)
+		goto out;
+
+	mtk_hw_get_value_no_lookup(hw, desc, &pu, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PD, &pf);
+	if (err)
+		goto out;
+
+	mtk_hw_get_value_no_lookup(hw, desc, &pd, &pf);
+
+	if (pu == 0 && pd == 0) {
+		*pullup = 0;
+		*enable = MTK_DISABLE;
+	} else if (pu == 1 && pd == 0) {
+		*pullup = 1;
+		*enable = MTK_ENABLE;
+	} else if (pu == 0 && pd == 1) {
+		*pullup = 0;
+		*enable = MTK_ENABLE;
+	} else {
+		err = -EINVAL;
+		goto out;
+	}
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_get_pullsel_pullen(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 *pullup, u32 *enable)
+{
+	struct mtk_pin_field pf;
+	int err = -EINVAL;
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PULLSEL, &pf);
+	if (err)
+		goto out;
+
+	mtk_hw_get_value_no_lookup(hw, desc, pullup, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PULLEN, &pf);
+	if (err)
+		goto out;
+
+	mtk_hw_get_value_no_lookup(hw, desc, enable, &pf);
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_get_pupd_r1_r0(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 *pullup, u32 *enable)
+{
+	struct mtk_pin_field pf;
+	int err = -EINVAL;
+	int r0, r1;
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_PUPD, &pf);
+	if (err)
+		goto out;
+
+	/* MTK HW PUPD bit: 1 for pull-down, 0 for pull-up */
+	mtk_hw_get_value_no_lookup(hw, desc, pullup, &pf);
+	*pullup = !(*pullup);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_R0, &pf);
+	if (err)
+		goto out;
+	mtk_hw_get_value_no_lookup(hw, desc, &r0, &pf);
+
+	err = mtk_hw_pin_field_lookup(hw, desc, PINCTRL_PIN_REG_R1, &pf);
+	if (err)
+		goto out;
+	mtk_hw_get_value_no_lookup(hw, desc, &r1, &pf);
+
+	if ((r1 == 0) && (r0 == 0))
+		*enable = MTK_PUPD_SET_R1R0_00;
+	else if ((r1 == 0) && (r0 == 1))
+		*enable = MTK_PUPD_SET_R1R0_01;
+	else if ((r1 == 1) && (r0 == 0))
+		*enable = MTK_PUPD_SET_R1R0_10;
+	else if ((r1 == 1) && (r0 == 1))
+		*enable = MTK_PUPD_SET_R1R0_11;
+	else
+		goto out;
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 pullup, u32 arg)
+{
+	int err;
+
+	err = mtk_pinconf_bias_set_pu_pd(hw, desc, pullup, arg);
+	if (!err)
+		goto out;
+
+	err = mtk_pinconf_bias_set_pullsel_pullen(hw, desc, pullup, arg);
+	if (!err)
+		goto out;
+
+	err = mtk_pinconf_bias_set_pupd_r1_r0(hw, desc, pullup, arg);
+
+out:
+	return err;
+}
+
+int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
+			      const struct mtk_pin_desc *desc,
+			      u32 *pullup, u32 *enable)
+{
+	int err;
+
+	err = mtk_pinconf_bias_get_pu_pd(hw, desc, pullup, enable);
+	if (!err)
+		goto out;
+
+	err = mtk_pinconf_bias_get_pullsel_pullen(hw, desc, pullup, enable);
+	if (!err)
+		goto out;
+
+	err = mtk_pinconf_bias_get_pupd_r1_r0(hw, desc, pullup, enable);
+
+out:
+	return err;
+}
+
 /* Revision 0 */
 int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
 			  const struct mtk_pin_desc *desc, u32 arg)
diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
index b3bada0..a13dcae 100644
--- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
+++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.h
@@ -216,6 +216,11 @@ struct mtk_pin_soc {
 	int (*bias_get)(struct mtk_pinctrl *hw,
 			const struct mtk_pin_desc *desc, bool pullup, int *res);
 
+	int (*bias_set_combo)(struct mtk_pinctrl *hw,
+			const struct mtk_pin_desc *desc, u32 pullup, u32 arg);
+	int (*bias_get_combo)(struct mtk_pinctrl *hw,
+			const struct mtk_pin_desc *desc, u32 *pullup, u32 *arg);
+
 	int (*drive_set)(struct mtk_pinctrl *hw,
 			 const struct mtk_pin_desc *desc, u32 arg);
 	int (*drive_get)(struct mtk_pinctrl *hw,
@@ -277,6 +282,12 @@ int mtk_pinconf_bias_set_rev1(struct mtk_pinctrl *hw,
 int mtk_pinconf_bias_get_rev1(struct mtk_pinctrl *hw,
 			      const struct mtk_pin_desc *desc, bool pullup,
 			      int *res);
+int mtk_pinconf_bias_set_combo(struct mtk_pinctrl *hw,
+				const struct mtk_pin_desc *desc,
+				u32 pullup, u32 enable);
+int mtk_pinconf_bias_get_combo(struct mtk_pinctrl *hw,
+			      const struct mtk_pin_desc *desc,
+			      u32 *pullup, u32 *enable);
 
 int mtk_pinconf_drive_set(struct mtk_pinctrl *hw,
 			  const struct mtk_pin_desc *desc, u32 arg);
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index bbe3f8a..0a9440a 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -79,28 +79,38 @@ 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 err, reg, ret = 1;
+	int pullup;
 	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)
-			err = hw->soc->bias_disable_get(hw, desc, &ret);
-		else
-			err = -ENOTSUPP;
-		break;
 	case PIN_CONFIG_BIAS_PULL_UP:
-		if (hw->soc->bias_get)
-			err = hw->soc->bias_get(hw, desc, 1, &ret);
-		else
-			err = -ENOTSUPP;
-		break;
 	case PIN_CONFIG_BIAS_PULL_DOWN:
-		if (hw->soc->bias_get)
-			err = hw->soc->bias_get(hw, desc, 0, &ret);
-		else
+		if (hw->soc->bias_get_combo) {
+			err = hw->soc->bias_get_combo(hw, desc, &pullup, &ret);
+			if (err)
+				goto out;
+			if (param == PIN_CONFIG_BIAS_DISABLE) {
+				if (ret == MTK_PUPD_SET_R1R0_00)
+					ret = MTK_DISABLE;
+			} else if (param == PIN_CONFIG_BIAS_PULL_UP) {
+				/* When desire to get pull-up value,
+				 * return error if current setting is pull-down
+				 */
+				if (!pullup)
+					err = -EINVAL;
+			} else if (param == PIN_CONFIG_BIAS_PULL_DOWN) {
+				/* When desire to get pull-down value,
+				 * return error if current setting is pull-up
+				 */
+				if (pullup)
+					err = -EINVAL;
+			}
+		} else {
 			err = -ENOTSUPP;
+		}
 		break;
 	case PIN_CONFIG_SLEW_RATE:
 		err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_SR, &ret);
@@ -188,20 +198,20 @@ 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)
-			err = hw->soc->bias_disable_set(hw, desc);
+		if (hw->soc->bias_set_combo)
+			err = hw->soc->bias_set_combo(hw, desc, 0, MTK_DISABLE);
 		else
 			err = -ENOTSUPP;
 		break;
 	case PIN_CONFIG_BIAS_PULL_UP:
-		if (hw->soc->bias_set)
-			err = hw->soc->bias_set(hw, desc, 1);
+		if (hw->soc->bias_set_combo)
+			err = hw->soc->bias_set_combo(hw, desc, 1, arg);
 		else
 			err = -ENOTSUPP;
 		break;
 	case PIN_CONFIG_BIAS_PULL_DOWN:
-		if (hw->soc->bias_set)
-			err = hw->soc->bias_set(hw, desc, 0);
+		if (hw->soc->bias_set_combo)
+			err = hw->soc->bias_set_combo(hw, desc, 0, arg);
 		else
 			err = -ENOTSUPP;
 		break;
@@ -892,7 +902,6 @@ 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);
-- 
1.8.1.1.dirty


^ permalink raw reply	[flat|nested] 11+ messages in thread

* [PATCH v2 5/5] pinctrl: mediatek: Add support for pin configuration dump via debugfs.
  2019-09-05  5:53 [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
                   ` (2 preceding siblings ...)
  2019-09-05  5:53 ` [PATCH v2 4/5] pinctrl: mediatek: Backward compatible to previous Mediatek's bias-pull usage Light Hsieh
@ 2019-09-05  5:53 ` Light Hsieh
  2019-09-05  6:00 ` [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
  4 siblings, 0 replies; 11+ messages in thread
From: Light Hsieh @ 2019-09-05  5:53 UTC (permalink / raw)
  To: linus.walleij
  Cc: linux-mediatek, linux-gpio, linux-kernel, sean.wang, Light Hsieh

From: Light Hsieh <light.hsieh@mediatek.com>

Add support for pin configuration dump via catting
/sys/kernel/debug/pinctrl/$platform_dependent_path/pinconf-pins.
pinctrl framework had already support such dump. This patch implement the
operation function pointer to fullfill this dump.

---
 drivers/pinctrl/mediatek/pinctrl-paris.c | 88 ++++++++++++++++++++++++++++++++
 drivers/pinctrl/mediatek/pinctrl-paris.h | 30 +++++++++++
 2 files changed, 118 insertions(+)

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 0a9440a..91d6e72 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -531,12 +531,99 @@ static int mtk_pctrl_get_group_pins(struct pinctrl_dev *pctldev,
 	return 0;
 }
 
+int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field)
+{
+	const struct mtk_pin_desc *desc;
+	int value, err;
+
+	if (gpio > hw->soc->npins)
+		return -EINVAL;
+
+	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
+
+	err = mtk_hw_get_value(hw, desc, field, &value);
+	if (err)
+		return err;
+
+	return value;
+}
+
+ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
+	unsigned int gpio, char *buf, unsigned int bufLen)
+{
+	const struct mtk_pin_desc *desc;
+	int pinmux, pullup, pullen, r1 = -1, r0 = -1, len = 0;
+
+	if (gpio > hw->soc->npins)
+		return -EINVAL;
+
+	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
+	pinmux = mtk_pctrl_get_pinmux(hw, gpio);
+	if (pinmux >= hw->soc->nfuncs)
+		pinmux -= hw->soc->nfuncs;
+
+	mtk_pinconf_bias_get_combo(hw, desc, &pullup, &pullen);
+	if (pullen == MTK_PUPD_SET_R1R0_00) {
+		pullen = 0;
+		r1 = 0;
+		r0 = 0;
+	} else if (pullen == MTK_PUPD_SET_R1R0_01) {
+		pullen = 1;
+		r1 = 0;
+		r0 = 1;
+	} else if (pullen == MTK_PUPD_SET_R1R0_10) {
+		pullen = 1;
+		r1 = 1;
+		r0 = 0;
+	} else if (pullen == MTK_PUPD_SET_R1R0_11) {
+		pullen = 1;
+		r1 = 1;
+		r0 = 1;
+	} else if (pullen != MTK_DISABLE && pullen != MTK_ENABLE) {
+		pullen = 0;
+	}
+	len += snprintf(buf + len, bufLen - len,
+			"%03d: %1d%1d%1d%1d%02d%1d%1d%1d%1d",
+			gpio,
+			pinmux,
+			mtk_pctrl_get_direction(hw, gpio),
+			mtk_pctrl_get_out(hw, gpio),
+			mtk_pctrl_get_in(hw, gpio),
+			mtk_pctrl_get_driving(hw, gpio),
+			mtk_pctrl_get_smt(hw, gpio),
+			mtk_pctrl_get_ies(hw, gpio),
+			pullen,
+			pullup);
+
+	if (r1 != -1) {
+		len += snprintf(buf + len, bufLen - len, " (%1d %1d)\n",
+			r1, r0);
+	} else {
+		len += snprintf(buf + len, bufLen - len, "\n");
+	}
+
+	return len;
+}
+
+#define PIN_DBG_BUF_SZ 96
+static void mtk_pctrl_dbg_show(struct pinctrl_dev *pctldev, struct seq_file *s,
+			  unsigned int gpio)
+{
+	struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+	char buf[PIN_DBG_BUF_SZ];
+
+	(void)mtk_pctrl_show_one_pin(hw, gpio, buf, PIN_DBG_BUF_SZ);
+
+	seq_printf(s, "%s", buf);
+}
+
 static const struct pinctrl_ops mtk_pctlops = {
 	.dt_node_to_map		= mtk_pctrl_dt_node_to_map,
 	.dt_free_map		= pinctrl_utils_free_map,
 	.get_groups_count	= mtk_pctrl_get_groups_count,
 	.get_group_name		= mtk_pctrl_get_group_name,
 	.get_group_pins		= mtk_pctrl_get_group_pins,
+	.pin_dbg_show           = mtk_pctrl_dbg_show,
 };
 
 static int mtk_pmx_get_funcs_cnt(struct pinctrl_dev *pctldev)
@@ -633,6 +720,7 @@ static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
 	.pin_config_get = mtk_pinconf_get,
 	.pin_config_group_get	= mtk_pconf_group_get,
 	.pin_config_group_set	= mtk_pconf_group_set,
+	.is_generic = true,
 };
 
 static struct pinctrl_desc mtk_desc = {
diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.h b/drivers/pinctrl/mediatek/pinctrl-paris.h
index 3d43771..d73f4b6 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.h
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.h
@@ -60,6 +60,36 @@
 int mtk_paris_pinctrl_probe(struct platform_device *pdev,
 			    const struct mtk_pin_soc *soc);
 
+int mtk_hw_get_value_wrap(struct mtk_pinctrl *hw, unsigned int gpio, int field);
+
+#define mtk_pctrl_get_pinmux(hw, gpio)			\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_MODE)
+
+/* MTK HW use 0 as input, 1 for output
+ * This interface is for get direct register value,
+ * so don't reverse
+ */
+#define mtk_pctrl_get_direction(hw, gpio)		\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DIR)
+
+#define mtk_pctrl_get_out(hw, gpio)			\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DO)
+
+#define mtk_pctrl_get_in(hw, gpio)			\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DI)
+
+#define mtk_pctrl_get_smt(hw, gpio)			\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_SMT)
+
+#define mtk_pctrl_get_ies(hw, gpio)			\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_IES)
+
+#define mtk_pctrl_get_driving(hw, gpio)			\
+	mtk_hw_get_value_wrap(hw, gpio, PINCTRL_PIN_REG_DRV)
+
+ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
+	unsigned int gpio, char *buf, unsigned int bufLen);
+
 extern const struct dev_pm_ops mtk_paris_pinctrl_pm_ops;
 
 #endif /* __PINCTRL_PARIS_H */
-- 
1.8.1.1.dirty


^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary  search in mtk_hw_pin_field_lookup()
  2019-09-05  5:53 [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
                   ` (3 preceding siblings ...)
  2019-09-05  5:53 ` [PATCH v2 5/5] pinctrl: mediatek: Add support for pin configuration dump via debugfs Light Hsieh
@ 2019-09-05  6:00 ` Light Hsieh
  2019-09-11  9:29   ` Linus Walleij
  2019-09-12 13:43   ` Linus Walleij
  4 siblings, 2 replies; 11+ messages in thread
From: Light Hsieh @ 2019-09-05  6:00 UTC (permalink / raw)
  To: linus.walleij; +Cc: linux-mediatek, linux-gpio, linux-kernel, sean.wang

Dear reviewers, 

v2 is the same as v1 except that commit message is corrected according
to Linus' comment for v1:

1. remove Change-Id lines
2. correct sysfs as debugfs

On Thu, 2019-09-05 at 13:53 +0800, Light Hsieh wrote:
> From: Light Hsieh <light.hsieh@mediatek.com>
> 
> 1. Check if gpio pin number is in valid range to prevent from get invalid
>    pointer 'desc' in the following code:
> 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
> 
> 2. Use binary search in mtk_hw_pin_field_lookup()
>    Modify mtk_hw_pin_field_lookup() to use binary search for accelerating
>    search.
> 
> ---
>  drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c | 24 +++++++++++++++++++-----
>  drivers/pinctrl/mediatek/pinctrl-paris.c         | 19 +++++++++++++++++++
>  2 files changed, 38 insertions(+), 5 deletions(-)
> 
> diff --git a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> index 20e1c89..4687f63 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-mtk-common-v2.c
> @@ -68,7 +68,7 @@ static int mtk_hw_pin_field_lookup(struct mtk_pinctrl *hw,
>  {
>  	const struct mtk_pin_field_calc *c, *e;
>  	const struct mtk_pin_reg_calc *rc;
> -	u32 bits;
> +	u32 bits, start = 0, end, found = 0, check;
>  
>  	if (hw->soc->reg_cal && hw->soc->reg_cal[field].range) {
>  		rc = &hw->soc->reg_cal[field];
> @@ -79,21 +79,32 @@ static int mtk_hw_pin_field_lookup(struct mtk_pinctrl *hw,
>  		return -ENOTSUPP;
>  	}
>  
> +	end = rc->nranges - 1;
>  	c = rc->range;
>  	e = c + rc->nranges;
>  
> -	while (c < e) {
> -		if (desc->number >= c->s_pin && desc->number <= c->e_pin)
> +	while (start <= end) {
> +		check = (start + end) >> 1;
> +		if (desc->number >= rc->range[check].s_pin
> +		 && desc->number <= rc->range[check].e_pin) {
> +			found = 1;
>  			break;
> -		c++;
> +		} else if (start == end)
> +			break;
> +		else if (desc->number < rc->range[check].s_pin)
> +			end = check - 1;
> +		else
> +			start = check + 1;
>  	}
>  
> -	if (c >= e) {
> +	if (!found) {
>  		dev_dbg(hw->dev, "Not support field %d for pin = %d (%s)\n",
>  			field, desc->number, desc->name);
>  		return -ENOTSUPP;
>  	}
>  
> +	c = rc->range + check;
> +
>  	if (c->i_base > hw->nbase - 1) {
>  		dev_err(hw->dev,
>  			"Invalid base for field %d for pin = %d (%s)\n",
> @@ -182,6 +193,9 @@ int mtk_hw_set_value(struct mtk_pinctrl *hw, const struct mtk_pin_desc *desc,
>  	if (err)
>  		return err;
>  
> +	if (value < 0 || value > pf.mask)
> +		return -EINVAL;
> +
>  	if (!pf.next)
>  		mtk_rmw(hw, pf.index, pf.offset, pf.mask << pf.bitpos,
>  			(value & pf.mask) << pf.bitpos);
> diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
> index 923264d..28b4951 100644
> --- a/drivers/pinctrl/mediatek/pinctrl-paris.c
> +++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
> @@ -693,6 +693,9 @@ static int mtk_gpio_get_direction(struct gpio_chip *chip, unsigned int gpio)
>  	const struct mtk_pin_desc *desc;
>  	int value, err;
>  
> +	if (gpio > hw->soc->npins)
> +		return -EINVAL;
> +
>  	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
>  
>  	err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DIR, &value);
> @@ -708,6 +711,9 @@ static int mtk_gpio_get(struct gpio_chip *chip, unsigned int gpio)
>  	const struct mtk_pin_desc *desc;
>  	int value, err;
>  
> +	if (gpio > hw->soc->npins)
> +		return -EINVAL;
> +
>  	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
>  
>  	err = mtk_hw_get_value(hw, desc, PINCTRL_PIN_REG_DI, &value);
> @@ -722,6 +728,9 @@ static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
>  	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
>  	const struct mtk_pin_desc *desc;
>  
> +	if (gpio > hw->soc->npins)
> +		return;
> +
>  	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
>  
>  	mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_DO, !!value);
> @@ -729,12 +738,22 @@ static void mtk_gpio_set(struct gpio_chip *chip, unsigned int gpio, int value)
>  
>  static int mtk_gpio_direction_input(struct gpio_chip *chip, unsigned int gpio)
>  {
> +	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
> +
> +	if (gpio > hw->soc->npins)
> +		return -EINVAL;
> +
>  	return pinctrl_gpio_direction_input(chip->base + gpio);
>  }
>  
>  static int mtk_gpio_direction_output(struct gpio_chip *chip, unsigned int gpio,
>  				     int value)
>  {
> +	struct mtk_pinctrl *hw = gpiochip_get_data(chip);
> +
> +	if (gpio > hw->soc->npins)
> +		return -EINVAL;
> +
>  	mtk_gpio_set(chip, gpio, value);
>  
>  	return pinctrl_gpio_direction_output(chip->base + gpio);



^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()
  2019-09-05  6:00 ` [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
@ 2019-09-11  9:29   ` Linus Walleij
  2019-09-11 17:27     ` Sean Wang
  2019-09-12 13:43   ` Linus Walleij
  1 sibling, 1 reply; 11+ messages in thread
From: Linus Walleij @ 2019-09-11  9:29 UTC (permalink / raw)
  To: Light Hsieh, Sean Wang
  Cc: moderated list:ARM/Mediatek SoC support,
	open list:GPIO SUBSYSTEM, linux-kernel

On Thu, Sep 5, 2019 at 7:00 AM Light Hsieh <light.hsieh@mediatek.com> wrote:

> v2 is the same as v1 except that commit message is corrected according
> to Linus' comment for v1:
>
> 1. remove Change-Id lines
> 2. correct sysfs as debugfs

Looks OK to me, but i need Sean's review on this, Sean?

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()
  2019-09-11  9:29   ` Linus Walleij
@ 2019-09-11 17:27     ` Sean Wang
  0 siblings, 0 replies; 11+ messages in thread
From: Sean Wang @ 2019-09-11 17:27 UTC (permalink / raw)
  To: Linus Walleij
  Cc: Light Hsieh, moderated list:ARM/Mediatek SoC support,
	open list:GPIO SUBSYSTEM, linux-kernel

Hi Linus,

That looks OK to me too

Acked-by: Sean Wang <sean.wang@kernel.org>

On Wed, Sep 11, 2019 at 2:29 AM Linus Walleij <linus.walleij@linaro.org> wrote:
>
> On Thu, Sep 5, 2019 at 7:00 AM Light Hsieh <light.hsieh@mediatek.com> wrote:
>
> > v2 is the same as v1 except that commit message is corrected according
> > to Linus' comment for v1:
> >
> > 1. remove Change-Id lines
> > 2. correct sysfs as debugfs
>
> Looks OK to me, but i need Sean's review on this, Sean?
>
> Yours,
> Linus Walleij

^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()
  2019-09-05  6:00 ` [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
  2019-09-11  9:29   ` Linus Walleij
@ 2019-09-12 13:43   ` Linus Walleij
  2019-09-13 12:40     ` Linus Walleij
  1 sibling, 1 reply; 11+ messages in thread
From: Linus Walleij @ 2019-09-12 13:43 UTC (permalink / raw)
  To: Light Hsieh
  Cc: moderated list:ARM/Mediatek SoC support,
	open list:GPIO SUBSYSTEM, linux-kernel, Sean Wang

On Thu, Sep 5, 2019 at 7:00 AM Light Hsieh <light.hsieh@mediatek.com> wrote:

> v2 is the same as v1 except that commit message is corrected according
> to Linus' comment for v1:
>
> 1. remove Change-Id lines
> 2. correct sysfs as debugfs

Patches applied with Sean's ACK.

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [PATCH v2 3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set()
  2019-09-05  5:53 ` [PATCH v2 3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set() Light Hsieh
@ 2019-09-13 12:39   ` Linus Walleij
  0 siblings, 0 replies; 11+ messages in thread
From: Linus Walleij @ 2019-09-13 12:39 UTC (permalink / raw)
  To: Light Hsieh
  Cc: moderated list:ARM/Mediatek SoC support,
	open list:GPIO SUBSYSTEM, linux-kernel, Sean Wang

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

^ permalink raw reply	[flat|nested] 11+ messages in thread

* Re: [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup()
  2019-09-12 13:43   ` Linus Walleij
@ 2019-09-13 12:40     ` Linus Walleij
  0 siblings, 0 replies; 11+ messages in thread
From: Linus Walleij @ 2019-09-13 12:40 UTC (permalink / raw)
  To: Light Hsieh
  Cc: moderated list:ARM/Mediatek SoC support,
	open list:GPIO SUBSYSTEM, linux-kernel, Sean Wang

On Thu, Sep 12, 2019 at 3:43 PM Linus Walleij <linus.walleij@linaro.org> wrote:
> On Thu, Sep 5, 2019 at 7:00 AM Light Hsieh <light.hsieh@mediatek.com> wrote:
>
> > v2 is the same as v1 except that commit message is corrected according
> > to Linus' comment for v1:
> >
> > 1. remove Change-Id lines
> > 2. correct sysfs as debugfs
>
> Patches applied with Sean's ACK.

Pulled all patches out again because they don't compile. No big deal,
let's just rebase and fix it up,

Yours,
Linus Walleij

^ permalink raw reply	[flat|nested] 11+ messages in thread

end of thread, back to index

Thread overview: 11+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-09-05  5:53 [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
2019-09-05  5:53 ` [PATCH v2 2/5] pinctrl: mediatek: Supporting driving setting without mapping current to register value Light Hsieh
2019-09-05  5:53 ` [PATCH v2 3/5] pinctrl: mediatek: Refine mtk_pinconf_get() and mtk_pinconf_set() Light Hsieh
2019-09-13 12:39   ` Linus Walleij
2019-09-05  5:53 ` [PATCH v2 4/5] pinctrl: mediatek: Backward compatible to previous Mediatek's bias-pull usage Light Hsieh
2019-09-05  5:53 ` [PATCH v2 5/5] pinctrl: mediatek: Add support for pin configuration dump via debugfs Light Hsieh
2019-09-05  6:00 ` [PATCH v2 1/5] pinctrl: mediatek: Check gpio pin number and use binary search in mtk_hw_pin_field_lookup() Light Hsieh
2019-09-11  9:29   ` Linus Walleij
2019-09-11 17:27     ` Sean Wang
2019-09-12 13:43   ` Linus Walleij
2019-09-13 12:40     ` Linus Walleij

Linux-GPIO Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-gpio/0 linux-gpio/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-gpio linux-gpio/ https://lore.kernel.org/linux-gpio \
		linux-gpio@vger.kernel.org linux-gpio@archiver.kernel.org
	public-inbox-index linux-gpio


Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-gpio


AGPL code for this site: git clone https://public-inbox.org/ public-inbox