Openwrt/target/linux/sunxi/patches-4.1/101-regulator-axp20x-prep-support-for-multiple-axp-families.patch

From f95b73ba272eac5495e69e12795d5ea8bc81d2cd Mon Sep 17 00:00:00 2001
From: Boris BREZILLON <boris.brezillon@free-electrons.com>
Date: Fri, 10 Apr 2015 12:09:03 +0800
Subject: [PATCH] regulator: axp20x: Prepare support for multiple AXP chip
 families

Rework the AXP20X_ macros and probe function to support the several chip
families, so that each family can define it's own set of regulators.

Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
[wens@csie.org: Support different DC-DC work frequency ranges]
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
---
 drivers/regulator/axp20x-regulator.c | 143 +++++++++++++++++++++++------------
 1 file changed, 94 insertions(+), 49 deletions(-)

--- a/drivers/regulator/axp20x-regulator.c
+++ b/drivers/regulator/axp20x-regulator.c
@@ -32,15 +32,15 @@
 
 #define AXP20X_FREQ_DCDC_MASK		0x0f
 
-#define AXP20X_DESC_IO(_id, _match, _supply, _min, _max, _step, _vreg, _vmask,	\
-		       _ereg, _emask, _enable_val, _disable_val)		\
-	[AXP20X_##_id] = {							\
+#define AXP_DESC_IO(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
+		    _vmask, _ereg, _emask, _enable_val, _disable_val)		\
+	[_family##_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
-		.id		= AXP20X_##_id,					\
+		.id		= _family##_##_id,				\
 		.n_voltages	= (((_max) - (_min)) / (_step) + 1),		\
 		.owner		= THIS_MODULE,					\
 		.min_uV		= (_min) * 1000,				\
@@ -54,15 +54,15 @@
 		.ops		= &axp20x_ops,					\
 	}
 
-#define AXP20X_DESC(_id, _match, _supply, _min, _max, _step, _vreg, _vmask,	\
-		    _ereg, _emask)						\
-	[AXP20X_##_id] = {							\
+#define AXP_DESC(_family, _id, _match, _supply, _min, _max, _step, _vreg,	\
+		 _vmask, _ereg, _emask) 					\
+	[_family##_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
-		.id		= AXP20X_##_id,					\
+		.id		= _family##_##_id,				\
 		.n_voltages	= (((_max) - (_min)) / (_step) + 1),		\
 		.owner		= THIS_MODULE,					\
 		.min_uV		= (_min) * 1000,				\
@@ -74,29 +74,29 @@
 		.ops		= &axp20x_ops,					\
 	}
 
-#define AXP20X_DESC_FIXED(_id, _match, _supply, _volt)				\
-	[AXP20X_##_id] = {							\
+#define AXP_DESC_FIXED(_family, _id, _match, _supply, _volt)			\
+	[_family##_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
-		.id		= AXP20X_##_id,					\
+		.id		= _family##_##_id,				\
 		.n_voltages	= 1,						\
 		.owner		= THIS_MODULE,					\
 		.min_uV		= (_volt) * 1000,				\
 		.ops		= &axp20x_ops_fixed				\
 	}
 
-#define AXP20X_DESC_TABLE(_id, _match, _supply, _table, _vreg, _vmask, _ereg,	\
-			  _emask)						\
-	[AXP20X_##_id] = {							\
+#define AXP_DESC_TABLE(_family, _id, _match, _supply, _table, _vreg, _vmask,	\
+		       _ereg, _emask)						\
+	[_family##_##_id] = {							\
 		.name		= #_id,						\
 		.supply_name	= (_supply),					\
 		.of_match	= of_match_ptr(_match),				\
 		.regulators_node = of_match_ptr("regulators"),			\
 		.type		= REGULATOR_VOLTAGE,				\
-		.id		= AXP20X_##_id,					\
+		.id		= _family##_##_id,				\
 		.n_voltages	= ARRAY_SIZE(_table),				\
 		.owner		= THIS_MODULE,					\
 		.vsel_reg	= (_vreg),					\
@@ -136,37 +136,57 @@ static struct regulator_ops axp20x_ops =
 };
 
 static const struct regulator_desc axp20x_regulators[] = {
-	AXP20X_DESC(DCDC2, "dcdc2", "vin2", 700, 2275, 25, AXP20X_DCDC2_V_OUT,
-		    0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
-	AXP20X_DESC(DCDC3, "dcdc3", "vin3", 700, 3500, 25, AXP20X_DCDC3_V_OUT,
-		    0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
-	AXP20X_DESC_FIXED(LDO1, "ldo1", "acin", 1300),
-	AXP20X_DESC(LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
-		    AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
-	AXP20X_DESC(LDO3, "ldo3", "ldo3in", 700, 3500, 25, AXP20X_LDO3_V_OUT,
-		    0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
-	AXP20X_DESC_TABLE(LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
-			  AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
-	AXP20X_DESC_IO(LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
-		       AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
-		       AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
+	AXP_DESC(AXP20X, DCDC2, "dcdc2", "vin2", 700, 2275, 25,
+		 AXP20X_DCDC2_V_OUT, 0x3f, AXP20X_PWR_OUT_CTRL, 0x10),
+	AXP_DESC(AXP20X, DCDC3, "dcdc3", "vin3", 700, 3500, 25,
+		 AXP20X_DCDC3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x02),
+	AXP_DESC_FIXED(AXP20X, LDO1, "ldo1", "acin", 1300),
+	AXP_DESC(AXP20X, LDO2, "ldo2", "ldo24in", 1800, 3300, 100,
+		 AXP20X_LDO24_V_OUT, 0xf0, AXP20X_PWR_OUT_CTRL, 0x04),
+	AXP_DESC(AXP20X, LDO3, "ldo3", "ldo3in", 700, 3500, 25,
+		 AXP20X_LDO3_V_OUT, 0x7f, AXP20X_PWR_OUT_CTRL, 0x40),
+	AXP_DESC_TABLE(AXP20X, LDO4, "ldo4", "ldo24in", axp20x_ldo4_data,
+		       AXP20X_LDO24_V_OUT, 0x0f, AXP20X_PWR_OUT_CTRL, 0x08),
+	AXP_DESC_IO(AXP20X, LDO5, "ldo5", "ldo5in", 1800, 3300, 100,
+		    AXP20X_LDO5_V_OUT, 0xf0, AXP20X_GPIO0_CTRL, 0x07,
+		    AXP20X_IO_ENABLED, AXP20X_IO_DISABLED),
 };
 
 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 {
 	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
+	u32 min, max, def, step;
 
-	if (dcdcfreq < 750) {
-		dcdcfreq = 750;
-		dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
+	switch (axp20x->variant) {
+	case AXP202_ID:
+	case AXP209_ID:
+		min = 750;
+		max = 1875;
+		def = 1500;
+		step = 75;
+		break;
+	default:
+		dev_err(&pdev->dev,
+			"Setting DCDC frequency for unsupported AXP variant\n");
+		return -EINVAL;
 	}
 
-	if (dcdcfreq > 1875) {
-		dcdcfreq = 1875;
-		dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
+	if (dcdcfreq == 0)
+		dcdcfreq = def;
+
+	if (dcdcfreq < min) {
+		dcdcfreq = min;
+		dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
+			 min);
 	}
 
-	dcdcfreq = (dcdcfreq - 750) / 75;
+	if (dcdcfreq > max) {
+		dcdcfreq = max;
+		dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
+			 max);
+	}
+
+	dcdcfreq = (dcdcfreq - min) / step;
 
 	return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
 				  AXP20X_FREQ_DCDC_MASK, dcdcfreq);
@@ -176,7 +196,7 @@ static int axp20x_regulator_parse_dt(str
 {
 	struct device_node *np, *regulators;
 	int ret;
-	u32 dcdcfreq;
+	u32 dcdcfreq = 0;
 
 	np = of_node_get(pdev->dev.parent->of_node);
 	if (!np)
@@ -186,7 +206,6 @@ static int axp20x_regulator_parse_dt(str
 	if (!regulators) {
 		dev_warn(&pdev->dev, "regulators node not found\n");
 	} else {
-		dcdcfreq = 1500;
 		of_property_read_u32(regulators, "x-powers,dcdc-freq", &dcdcfreq);
 		ret = axp20x_set_dcdc_freq(pdev, dcdcfreq);
 		if (ret < 0) {
@@ -202,15 +221,27 @@ static int axp20x_regulator_parse_dt(str
 
 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
 {
-	unsigned int mask = AXP20X_WORKMODE_DCDC2_MASK;
+	struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
+	unsigned int mask;
 
-	if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
+	switch (axp20x->variant) {
+	case AXP202_ID:
+	case AXP209_ID:
+		if ((id != AXP20X_DCDC2) && (id != AXP20X_DCDC3))
+			return -EINVAL;
+
+		mask = AXP20X_WORKMODE_DCDC2_MASK;
+		if (id == AXP20X_DCDC3)
+			mask = AXP20X_WORKMODE_DCDC3_MASK;
+
+		workmode <<= ffs(mask) - 1;
+		break;
+
+	default:
+		/* should not happen */
+		WARN_ON(1);
 		return -EINVAL;
-
-	if (id == AXP20X_DCDC3)
-		mask = AXP20X_WORKMODE_DCDC3_MASK;
-
-	workmode <<= ffs(mask) - 1;
+	}
 
 	return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
 }
@@ -219,22 +250,36 @@ static int axp20x_regulator_probe(struct
 {
 	struct regulator_dev *rdev;
 	struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
+	const struct regulator_desc *regulators;
 	struct regulator_config config = {
 		.dev = pdev->dev.parent,
 		.regmap = axp20x->regmap,
+		.driver_data = axp20x,
 	};
-	int ret, i;
+	int ret, i, nregulators;
 	u32 workmode;
 
+	switch (axp20x->variant) {
+	case AXP202_ID:
+	case AXP209_ID:
+		regulators = axp20x_regulators;
+		nregulators = AXP20X_REG_ID_MAX;
+		break;
+	default:
+		dev_err(&pdev->dev, "Unsupported AXP variant: %ld\n",
+			axp20x->variant);
+		return -EINVAL;
+	}
+
 	/* This only sets the dcdc freq. Ignore any errors */
 	axp20x_regulator_parse_dt(pdev);
 
-	for (i = 0; i < AXP20X_REG_ID_MAX; i++) {
-		rdev = devm_regulator_register(&pdev->dev, &axp20x_regulators[i],
+	for (i = 0; i < nregulators; i++) {
+		rdev = devm_regulator_register(&pdev->dev, &regulators[i],
 					       &config);
 		if (IS_ERR(rdev)) {
 			dev_err(&pdev->dev, "Failed to register %s\n",
-				axp20x_regulators[i].name);
+				regulators[i].name);
 
 			return PTR_ERR(rdev);
 		}
@@ -245,7 +290,7 @@ static int axp20x_regulator_probe(struct
 		if (!ret) {
 			if (axp20x_set_dcdc_workmode(rdev, i, workmode))
 				dev_err(&pdev->dev, "Failed to set workmode on %s\n",
-					axp20x_regulators[i].name);
+					rdev->desc->name);
 		}
 	}