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>

diff --git a/drivers/regulator/axp20x-regulator.c b/drivers/regulator/axp20x-regulator.c
index e4331f5..50ae0b5 100644 (file)
--- 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;
+
+       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 == 0)
+               dcdcfreq = def;
 
-       if (dcdcfreq < 750) {
-               dcdcfreq = 750;
-               dev_warn(&pdev->dev, "DCDC frequency too low. Set to 750kHz\n");
+       if (dcdcfreq < min) {
+               dcdcfreq = min;
+               dev_warn(&pdev->dev, "DCDC frequency too low. Set to %ukHz\n",
+                        min);
        }
 
-       if (dcdcfreq > 1875) {
-               dcdcfreq = 1875;
-               dev_warn(&pdev->dev, "DCDC frequency too high. Set to 1875kHz\n");
+       if (dcdcfreq > max) {
+               dcdcfreq = max;
+               dev_warn(&pdev->dev, "DCDC frequency too high. Set to %ukHz\n",
+                        max);
        }
 
-       dcdcfreq = (dcdcfreq - 750) / 75;
+       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(struct platform_device *pdev)
 {
        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(struct platform_device *pdev)
        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(struct platform_device *pdev)
 
 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))
-               return -EINVAL;
+       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;
 
-       if (id == AXP20X_DCDC3)
-               mask = AXP20X_WORKMODE_DCDC3_MASK;
+               workmode <<= ffs(mask) - 1;
+               break;
 
-       workmode <<= ffs(mask) - 1;
+       default:
+               /* should not happen */
+               WARN_ON(1);
+               return -EINVAL;
+       }
 
        return regmap_update_bits(rdev->regmap, AXP20X_DCDC_MODE, mask, workmode);
 }
@@ -219,22 +250,36 @@ static int axp20x_regulator_probe(struct platform_device *pdev)
 {
        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 platform_device *pdev)
                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);
                }
        }