regulator: axp20x: Support AXP806 variant

The X-Powers AXP806 PMIC has a new set of buck and LDO regulators, and
also a switch. The buck regulators support teaming into multi-phase
groups, with A+B, A+B+C, D+E groupings.

Some registers controlling DCDC converter work settings are at different
offsets. Deal with them as well.

Add support for this new variant.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

1 files changed, 111 insertions, 7 deletions

diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
index 6d9ac76a772f..54382ef902c6 100644
--- a/drivers/regulator/axp20x-regulator.c
+++ b/drivers/regulator/axp20x-regulator.c
@@ -244,16 +244,64 @@ static const struct regulator_desc axp22x_drivevbus_regulator = {
         .ops            = &axp20x_ops_sw,
 };
 
-static const struct regulator_linear_range axp809_dcdc4_ranges[] = {
-        REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2f, 20000),
-        REGULATOR_LINEAR_RANGE(1800000, 0x30, 0x38, 100000),
+static const struct regulator_linear_range axp806_dcdca_ranges[] = {
+        REGULATOR_LINEAR_RANGE(600000, 0x0, 0x32, 10000),
+        REGULATOR_LINEAR_RANGE(1120000, 0x33, 0x47, 20000),
 };
 
-static const struct regulator_linear_range axp809_dldo1_ranges[] = {
+static const struct regulator_linear_range axp806_dcdcd_ranges[] = {
+        REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2d, 20000),
+        REGULATOR_LINEAR_RANGE(1600000, 0x2e, 0x3f, 100000),
+};
+
+static const struct regulator_linear_range axp806_cldo2_ranges[] = {
         REGULATOR_LINEAR_RANGE(700000, 0x0, 0x1a, 100000),
         REGULATOR_LINEAR_RANGE(3400000, 0x1b, 0x1f, 200000),
 };
 
+static const struct regulator_desc axp806_regulators[] = {
+        AXP_DESC_RANGES(AXP806, DCDCA, "dcdca", "vina", axp806_dcdca_ranges,
+                        72, AXP806_DCDCA_V_CTRL, 0x7f, AXP806_PWR_OUT_CTRL1,
+                        BIT(0)),
+        AXP_DESC(AXP806, DCDCB, "dcdcb", "vinb", 1000, 2550, 50,
+                 AXP806_DCDCB_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(1)),
+        AXP_DESC_RANGES(AXP806, DCDCC, "dcdcc", "vinc", axp806_dcdca_ranges,
+                        72, AXP806_DCDCC_V_CTRL, 0x7f, AXP806_PWR_OUT_CTRL1,
+                        BIT(2)),
+        AXP_DESC_RANGES(AXP806, DCDCD, "dcdcd", "vind", axp806_dcdcd_ranges,
+                        64, AXP806_DCDCD_V_CTRL, 0x3f, AXP806_PWR_OUT_CTRL1,
+                        BIT(3)),
+        AXP_DESC(AXP806, DCDCE, "dcdce", "vine", 1100, 3400, 100,
+                 AXP806_DCDCB_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(4)),
+        AXP_DESC(AXP806, ALDO1, "aldo1", "aldoin", 700, 3300, 100,
+                 AXP806_ALDO1_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(5)),
+        AXP_DESC(AXP806, ALDO2, "aldo2", "aldoin", 700, 3400, 100,
+                 AXP806_ALDO2_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(6)),
+        AXP_DESC(AXP806, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
+                 AXP806_ALDO3_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL1, BIT(7)),
+        AXP_DESC(AXP806, BLDO1, "bldo1", "bldoin", 700, 1900, 100,
+                 AXP806_BLDO1_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(0)),
+        AXP_DESC(AXP806, BLDO2, "bldo2", "bldoin", 700, 1900, 100,
+                 AXP806_BLDO2_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(1)),
+        AXP_DESC(AXP806, BLDO3, "bldo3", "bldoin", 700, 1900, 100,
+                 AXP806_BLDO3_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(2)),
+        AXP_DESC(AXP806, BLDO4, "bldo4", "bldoin", 700, 1900, 100,
+                 AXP806_BLDO4_V_CTRL, 0x0f, AXP806_PWR_OUT_CTRL2, BIT(3)),
+        AXP_DESC(AXP806, CLDO1, "cldo1", "cldoin", 700, 3300, 100,
+                 AXP806_CLDO1_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2, BIT(4)),
+        AXP_DESC_RANGES(AXP806, CLDO2, "cldo2", "cldoin", axp806_cldo2_ranges,
+                        32, AXP806_CLDO2_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2,
+                        BIT(5)),
+        AXP_DESC(AXP806, CLDO3, "cldo3", "cldoin", 700, 3300, 100,
+                 AXP806_CLDO3_V_CTRL, 0x1f, AXP806_PWR_OUT_CTRL2, BIT(6)),
+        AXP_DESC_SW(AXP806, SW, "sw", "swin", AXP806_PWR_OUT_CTRL2, BIT(7)),
+};
+
+static const struct regulator_linear_range axp809_dcdc4_ranges[] = {
+        REGULATOR_LINEAR_RANGE(600000, 0x0, 0x2f, 20000),
+        REGULATOR_LINEAR_RANGE(1800000, 0x30, 0x38, 100000),
+};
+
 static const struct regulator_desc axp809_regulators[] = {
         AXP_DESC(AXP809, DCDC1, "dcdc1", "vin1", 1600, 3400, 100,
                  AXP22X_DCDC1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(1)),
@@ -278,7 +326,7 @@ static const struct regulator_desc axp809_regulators[] = {
                  AXP22X_ALDO2_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL1, BIT(7)),
         AXP_DESC(AXP809, ALDO3, "aldo3", "aldoin", 700, 3300, 100,
                  AXP22X_ALDO3_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2, BIT(5)),
-        AXP_DESC_RANGES(AXP809, DLDO1, "dldo1", "dldoin", axp809_dldo1_ranges,
+        AXP_DESC_RANGES(AXP809, DLDO1, "dldo1", "dldoin", axp806_cldo2_ranges,
                         32, AXP22X_DLDO1_V_OUT, 0x1f, AXP22X_PWR_OUT_CTRL2,
                         BIT(3)),
         AXP_DESC(AXP809, DLDO2, "dldo2", "dldoin", 700, 3300, 100,
@@ -302,6 +350,7 @@ static const struct regulator_desc axp809_regulators[] = {
 static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 {
         struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
+        unsigned int reg = AXP20X_DCDC_FREQ;
         u32 min, max, def, step;
 
         switch (axp20x->variant) {
@@ -312,6 +361,14 @@ static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
                 def = 1500;
                 step = 75;
                 break;
+        case AXP806_ID:
+                /*
+                 * AXP806 DCDC work frequency setting has the same range and
+                 * step as AXP22X, but at a different register.
+                 * Fall through to the check below.
+                 * (See include/linux/mfd/axp20x.h)
+                 */
+                reg = AXP806_DCDC_FREQ_CTRL;
         case AXP221_ID:
         case AXP223_ID:
         case AXP809_ID:
@@ -343,7 +400,7 @@ static int axp20x_set_dcdc_freq(struct platform_device *pdev, u32 dcdcfreq)
 
         dcdcfreq = (dcdcfreq - min) / step;
 
-        return regmap_update_bits(axp20x->regmap, AXP20X_DCDC_FREQ,
+        return regmap_update_bits(axp20x->regmap, reg,
                                   AXP20X_FREQ_DCDC_MASK, dcdcfreq);
 }
 
@@ -377,6 +434,7 @@ static int axp20x_regulator_parse_dt(struct platform_device *pdev)
 static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 workmode)
 {
         struct axp20x_dev *axp20x = rdev_get_drvdata(rdev);
+        unsigned int reg = AXP20X_DCDC_MODE;
         unsigned int mask;
 
         switch (axp20x->variant) {
@@ -392,6 +450,13 @@ static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 work
                 workmode <<= ffs(mask) - 1;
                 break;
 
+        case AXP806_ID:
+                reg = AXP806_DCDC_MODE_CTRL2;
+                /*
+                 * AXP806 DCDC regulator IDs have the same range as AXP22X.
+                 * Fall through to the check below.
+                 * (See include/linux/mfd/axp20x.h)
+                 */
         case AXP221_ID:
         case AXP223_ID:
         case AXP809_ID:
@@ -408,7 +473,34 @@ static int axp20x_set_dcdc_workmode(struct regulator_dev *rdev, int id, u32 work
                 return -EINVAL;
         }
 
-        return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
+        return regmap_update_bits(rdev->regmap, reg, mask, workmode);
+}
+
+/*
+ * This function checks whether a regulator is part of a poly-phase
+ * output setup based on the registers settings. Returns true if it is.
+ */
+static bool axp20x_is_polyphase_slave(struct axp20x_dev *axp20x, int id)
+{
+        u32 reg = 0;
+
+        /* Only AXP806 has poly-phase outputs */
+        if (axp20x->variant != AXP806_ID)
+                return false;
+
+        regmap_read(axp20x->regmap, AXP806_DCDC_MODE_CTRL2, &reg);
+
+        switch (id) {
+        case AXP806_DCDCB:
+                return (((reg & GENMASK(7, 6)) == BIT(6)) ||
+                        ((reg & GENMASK(7, 6)) == BIT(7)));
+        case AXP806_DCDCC:
+                return ((reg & GENMASK(7, 6)) == BIT(7));
+        case AXP806_DCDCE:
+                return !!(reg & BIT(5));
+        }
+
+        return false;
 }
 
 static int axp20x_regulator_probe(struct platform_device *pdev)
@@ -440,6 +532,10 @@ static int axp20x_regulator_probe(struct platform_device *pdev)
                 drivevbus = of_property_read_bool(pdev->dev.parent->of_node,
                                                   "x-powers,drive-vbus-en");
                 break;
+        case AXP806_ID:
+                regulators = axp806_regulators;
+                nregulators = AXP806_REG_ID_MAX;
+                break;
         case AXP809_ID:
                 regulators = axp809_regulators;
                 nregulators = AXP809_REG_ID_MAX;
@@ -458,6 +554,14 @@ static int axp20x_regulator_probe(struct platform_device *pdev)
                 struct regulator_desc *new_desc;
 
                 /*
+                 * If this regulator is a slave in a poly-phase setup,
+                 * skip it, as its controls are bound to the master
+                 * regulator and won't work.
+                 */
+                if (axp20x_is_polyphase_slave(axp20x, i))
+                        continue;
+
+                /*
                  * Regulators DC1SW and DC5LDO are connected internally,
                  * so we have to handle their supply names separately.
                  *