[PATCH v2 1/2] regulator: mc13xxx: Add warning of incorrect names of regulators

[PATCH v2 1/2] regulator: mc13xxx: Add warning of incorrect names of regulators

[Alexander Shiyan]

This patch adds a warning about incorrect regulators instead of
printing the names of non-information message about the wrong amount.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
---
 drivers/regulator/mc13892-regulator.c      | 39 +++---------------------------
 drivers/regulator/mc13xxx-regulator-core.c | 17 +++++++++----
 drivers/regulator/mc13xxx.h                |  4 +--
 3 files changed, 17 insertions(+), 43 deletions(-)

diff --git a/drivers/regulator/mc13892-regulator.c b/drivers/regulator/mc13892-regulator.c
index 714377c..b716283 100644
--- a/drivers/regulator/mc13892-regulator.c
+++ b/drivers/regulator/mc13892-regulator.c
@@ -536,7 +536,7 @@ static int mc13892_regulator_probe(struct platform_device *pdev)
 	struct mc13xxx_regulator_init_data *mc13xxx_data;
 	struct regulator_config config = { };
 	int i, ret;
-	int num_regulators = 0, num_parsed;
+	int num_regulators = 0;
 	u32 val;
 
 	num_regulators = mc13xxx_get_num_regulators_dt(pdev);
@@ -546,8 +546,6 @@ static int mc13892_regulator_probe(struct platform_device *pdev)
 	if (num_regulators <= 0)
 		return -EINVAL;
 
-	num_parsed = num_regulators;
-
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv) +
 		num_regulators * sizeof(priv->regulators[0]),
 		GFP_KERNEL);
@@ -590,40 +588,9 @@ static int mc13892_regulator_probe(struct platform_device *pdev)
 		= mc13892_vcam_get_mode;
 
 	mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13892_regulators,
-					ARRAY_SIZE(mc13892_regulators),
-					&num_parsed);
-
-	/*
-	 * Perform a little sanity check on the regulator tree - if we found
-	 * a number of regulators from mc13xxx_get_num_regulators_dt and
-	 * then parsed a smaller number in mc13xxx_parse_regulators_dt then
-	 * there is a regulator defined in the regulators node which has
-	 * not matched any usable regulator in the driver. In this case,
-	 * there is one missing and what will happen is the first regulator
-	 * will get registered again.
-	 *
-	 * Fix this by basically making our number of registerable regulators
-	 * equal to the number of regulators we parsed. We are allocating
-	 * too much memory for priv, but this is unavoidable at this point.
-	 *
-	 * As an example of how this can happen, try making a typo in your
-	 * regulators node (vviohi {} instead of viohi {}) so that the name
-	 * does not match..
-	 *
-	 * The check will basically pass for platform data (non-DT) because
-	 * mc13xxx_parse_regulators_dt for !CONFIG_OF will not touch num_parsed.
-	 *
-	 */
-	if (num_parsed != num_regulators) {
-		dev_warn(&pdev->dev,
-		"parsed %d != regulators %d - check your device tree!\n",
-			num_parsed, num_regulators);
-
-		num_regulators = num_parsed;
-		priv->num_regulators = num_regulators;
-	}
+					ARRAY_SIZE(mc13892_regulators));
 
-	for (i = 0; i < num_regulators; i++) {
+	for (i = 0; i < priv->num_regulators; i++) {
 		struct regulator_init_data *init_data;
 		struct regulator_desc *desc;
 		struct device_node *node = NULL;
diff --git a/drivers/regulator/mc13xxx-regulator-core.c b/drivers/regulator/mc13xxx-regulator-core.c
index 23cf9f9..da48592 100644
--- a/drivers/regulator/mc13xxx-regulator-core.c
+++ b/drivers/regulator/mc13xxx-regulator-core.c
@@ -180,15 +180,13 @@ EXPORT_SYMBOL_GPL(mc13xxx_get_num_regulators_dt);
 
 struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
 	struct platform_device *pdev, struct mc13xxx_regulator *regulators,
-	int num_regulators, int *num_parsed)
+	int num_regulators)
 {
 	struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
 	struct mc13xxx_regulator_init_data *data, *p;
 	struct device_node *parent, *child;
 	int i, parsed = 0;
 
-	*num_parsed = 0;
-
 	of_node_get(pdev->dev.parent->of_node);
 	parent = of_find_node_by_name(pdev->dev.parent->of_node, "regulators");
 	if (!parent)
@@ -204,10 +202,13 @@ struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
 	p = data;
 
 	for_each_child_of_node(parent, child) {
+		int found = 0;
+
 		for (i = 0; i < num_regulators; i++) {
+			if (!regulators[i].desc.name)
+				continue;
 			if (!of_node_cmp(child->name,
 					 regulators[i].desc.name)) {
-
 				p->id = i;
 				p->init_data = of_get_regulator_init_data(
 							&pdev->dev, child);
@@ -215,13 +216,19 @@ struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
 				p++;
 
 				parsed++;
+				found = 1;
 				break;
 			}
 		}
+
+		if (!found)
+			dev_warn(&pdev->dev,
+				 "Unknown regulator: %s\n", child->name);
 	}
 	of_node_put(parent);
 
-	*num_parsed = parsed;
+	priv->num_regulators = parsed;
+
 	return data;
 }
 EXPORT_SYMBOL_GPL(mc13xxx_parse_regulators_dt);
diff --git a/drivers/regulator/mc13xxx.h b/drivers/regulator/mc13xxx.h
index 007f833..06c8903 100644
--- a/drivers/regulator/mc13xxx.h
+++ b/drivers/regulator/mc13xxx.h
@@ -39,7 +39,7 @@ extern int mc13xxx_fixed_regulator_set_voltage(struct regulator_dev *rdev,
 extern int mc13xxx_get_num_regulators_dt(struct platform_device *pdev);
 extern struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
 	struct platform_device *pdev, struct mc13xxx_regulator *regulators,
-	int num_regulators, int *num_parsed);
+	int num_regulators);
 #else
 static inline int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
 {
@@ -48,7 +48,7 @@ static inline int mc13xxx_get_num_regulators_dt(struct platform_device *pdev)
 
 static inline struct mc13xxx_regulator_init_data *mc13xxx_parse_regulators_dt(
 	struct platform_device *pdev, struct mc13xxx_regulator *regulators,
-	int num_regulators, int *num_parsed)
+	int num_regulators)
 {
 	return NULL;
 }
-- 
1.8.1.5

[PATCH v2 2/2] regulator: mc13783: Add device tree probe support

[Alexander Shiyan]

Patch adds device tree probe support for mc13783-regulator driver.

Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
---
 Documentation/devicetree/bindings/mfd/mc13xxx.txt | 36 +++++++++++++++++--
 drivers/regulator/mc13783-regulator.c             | 44 +++++++++++++++--------
 2 files changed, 62 insertions(+), 18 deletions(-)

diff --git a/Documentation/devicetree/bindings/mfd/mc13xxx.txt b/Documentation/devicetree/bindings/mfd/mc13xxx.txt
index baf0798..abd9e3c 100644
--- a/Documentation/devicetree/bindings/mfd/mc13xxx.txt
+++ b/Documentation/devicetree/bindings/mfd/mc13xxx.txt
@@ -10,10 +10,40 @@ Optional properties:
 - fsl,mc13xxx-uses-touch : Indicate the touchscreen controller is being used
 
 Sub-nodes:
-- regulators : Contain the regulator nodes.  The MC13892 regulators are
-  bound using their names as listed below with their registers and bits
-  for enabling.
+- regulators : Contain the regulator nodes. The regulators are bound using
+  their names as listed below with their registers and bits for enabling.
 
+MC13783 regulators:
+    sw1a      : regulator SW1A      (register 24, bit 0)
+    sw1b      : regulator SW1B      (register 25, bit 0)
+    sw2a      : regulator SW2A      (register 26, bit 0)
+    sw2b      : regulator SW2B      (register 27, bit 0)
+    sw3       : regulator SW3       (register 29, bit 20)
+    vaudio    : regulator VAUDIO    (register 32, bit 0)
+    viohi     : regulator VIOHI     (register 32, bit 3)
+    violo     : regulator VIOLO     (register 32, bit 6)
+    vdig      : regulator VDIG      (register 32, bit 9)
+    vgen      : regulator VGEN      (register 32, bit 12)
+    vrfdig    : regulator VRFDIG    (register 32, bit 15)
+    vrfref    : regulator VRFREF    (register 32, bit 18)
+    vrfcp     : regulator VRFCP     (register 32, bit 21)
+    vsim      : regulator VSIM      (register 33, bit 0)
+    vesim     : regulator VESIM     (register 33, bit 3)
+    vcam      : regulator VCAM      (register 33, bit 6)
+    vrfbg     : regulator VRFBG     (register 33, bit 9)
+    vvib      : regulator VVIB      (register 33, bit 11)
+    vrf1      : regulator VRF1      (register 33, bit 12)
+    vrf2      : regulator VRF2      (register 33, bit 15)
+    vmmc1     : regulator VMMC1     (register 33, bit 18)
+    vmmc2     : regulator VMMC2     (register 33, bit 21)
+    gpo1      : regulator GPO1      (register 34, bit 6)
+    gpo2      : regulator GPO2      (register 34, bit 8)
+    gpo3      : regulator GPO3      (register 34, bit 10)
+    gpo4      : regulator GPO4      (register 34, bit 12)
+    pwgt1spi  : regulator PWGT1SPI  (register 34, bit 15)
+    pwgt2spi  : regulator PWGT2SPI  (register 34, bit 16)
+
+MC13892 regulators:
     vcoincell : regulator VCOINCELL (register 13, bit 23)
     sw1       : regulator SW1	    (register 24, bit 0)
     sw2       : regulator SW2	    (register 25, bit 0)
diff --git a/drivers/regulator/mc13783-regulator.c b/drivers/regulator/mc13783-regulator.c
index c46c670..fdf7f0a 100644
--- a/drivers/regulator/mc13783-regulator.c
+++ b/drivers/regulator/mc13783-regulator.c
@@ -398,33 +398,51 @@ static int mc13783_regulator_probe(struct platform_device *pdev)
 	struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent);
 	struct mc13xxx_regulator_platform_data *pdata =
 		dev_get_platdata(&pdev->dev);
-	struct mc13xxx_regulator_init_data *init_data;
+	struct mc13xxx_regulator_init_data *mc13xxx_data;
 	struct regulator_config config = { };
-	int i, ret;
+	int i, ret, num_regulators;
 
-	dev_dbg(&pdev->dev, "%s id %d\n", __func__, pdev->id);
+	num_regulators = mc13xxx_get_num_regulators_dt(pdev);
 
-	if (!pdata)
+	if (num_regulators <= 0 && pdata)
+		num_regulators = pdata->num_regulators;
+	if (num_regulators <= 0)
 		return -EINVAL;
 
 	priv = devm_kzalloc(&pdev->dev, sizeof(*priv) +
-			pdata->num_regulators * sizeof(priv->regulators[0]),
+			num_regulators * sizeof(priv->regulators[0]),
 			GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;
 
+	priv->num_regulators = num_regulators;
 	priv->mc13xxx_regulators = mc13783_regulators;
 	priv->mc13xxx = mc13783;
+	platform_set_drvdata(pdev, priv);
 
-	for (i = 0; i < pdata->num_regulators; i++) {
-		struct regulator_desc *desc;
+	mc13xxx_data = mc13xxx_parse_regulators_dt(pdev, mc13783_regulators,
+					ARRAY_SIZE(mc13783_regulators));
 
-		init_data = &pdata->regulators[i];
-		desc = &mc13783_regulators[init_data->id].desc;
+	for (i = 0; i < priv->num_regulators; i++) {
+		struct regulator_init_data *init_data;
+		struct regulator_desc *desc;
+		struct device_node *node = NULL;
+		int id;
+
+		if (mc13xxx_data) {
+			id = mc13xxx_data[i].id;
+			init_data = mc13xxx_data[i].init_data;
+			node = mc13xxx_data[i].node;
+		} else {
+			id = pdata->regulators[i].id;
+			init_data = pdata->regulators[i].init_data;
+		}
+		desc = &mc13783_regulators[id].desc;
 
 		config.dev = &pdev->dev;
-		config.init_data = init_data->init_data;
+		config.init_data = init_data;
 		config.driver_data = priv;
+		config.of_node = node;
 
 		priv->regulators[i] = regulator_register(desc, &config);
 		if (IS_ERR(priv->regulators[i])) {
@@ -435,8 +453,6 @@ static int mc13783_regulator_probe(struct platform_device *pdev)
 		}
 	}
 
-	platform_set_drvdata(pdev, priv);
-
 	return 0;
 err:
 	while (--i >= 0)
@@ -448,13 +464,11 @@ err:
 static int mc13783_regulator_remove(struct platform_device *pdev)
 {
 	struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev);
-	struct mc13xxx_regulator_platform_data *pdata =
-		dev_get_platdata(&pdev->dev);
 	int i;
 
 	platform_set_drvdata(pdev, NULL);
 
-	for (i = 0; i < pdata->num_regulators; i++)
+	for (i = 0; i < priv->num_regulators; i++)
 		regulator_unregister(priv->regulators[i]);
 
 	return 0;
-- 
1.8.1.5

Re: [PATCH v2 1/2] regulator: mc13xxx: Add warning of incorrect names of regulators

[Mark Brown]

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On Sat, Apr 27, 2013 at 10:29:24AM +0400, Alexander Shiyan wrote:
> This patch adds a warning about incorrect regulators instead of
> printing the names of non-information message about the wrong amount.

Applied both, thanks.

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