regulator: act8865: prepare support for other act88xx devices

This patch prepares support for other devices in the act88xx family of
PMUs manufactured by Active-Semi.

http://www.active-semi.com/products/power-management-units/act88xx/

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Tested-by: Wenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 83 insertions, 128 deletions

diff --git a/drivers/regulator/act8865-regulator.c b/drivers/regulator/act8865-regulator.c
index 52d1b6cad76f..b26eaf7580fc 100644
--- a/drivers/regulator/act8865-regulator.c
+++ b/drivers/regulator/act8865-regulator.c
@@ -1,6 +1,7 @@
 /*
- * act8865-regulator.c - Voltage regulation for the active-semi ACT8865
- * http://www.active-semi.com/sheets/ACT8865_Datasheet.pdf
+ * act8865-regulator.c - Voltage regulation for active-semi ACT88xx PMUs
+ *
+ * http://www.active-semi.com/products/power-management-units/act88xx/
  *
  * Copyright (C) 2013 Atmel Corporation
  *
@@ -70,7 +71,7 @@ static const struct regmap_config act8865_regmap_config = {
         .val_bits = 8,
 };
 
-static const struct regulator_linear_range act8865_volatge_ranges[] = {
+static const struct regulator_linear_range act8865_voltage_ranges[] = {
         REGULATOR_LINEAR_RANGE(600000, 0, 23, 25000),
         REGULATOR_LINEAR_RANGE(1200000, 24, 47, 50000),
         REGULATOR_LINEAR_RANGE(2400000, 48, 63, 100000),
@@ -86,110 +87,35 @@ static struct regulator_ops act8865_ops = {
         .is_enabled             = regulator_is_enabled_regmap,
 };
 
-static const struct regulator_desc act8865_reg[] = {
-        {
-                .name = "DCDC_REG1",
-                .id = ACT8865_ID_DCDC1,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_DCDC1_VSET1,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_DCDC1_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
-        {
-                .name = "DCDC_REG2",
-                .id = ACT8865_ID_DCDC2,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_DCDC2_VSET1,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_DCDC2_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
-        {
-                .name = "DCDC_REG3",
-                .id = ACT8865_ID_DCDC3,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_DCDC3_VSET1,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_DCDC3_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
-        {
-                .name = "LDO_REG1",
-                .id = ACT8865_ID_LDO1,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_LDO1_VSET,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_LDO1_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
-        {
-                .name = "LDO_REG2",
-                .id = ACT8865_ID_LDO2,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_LDO2_VSET,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_LDO2_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
-        {
-                .name = "LDO_REG3",
-                .id = ACT8865_ID_LDO3,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_LDO3_VSET,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_LDO3_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
-        {
-                .name = "LDO_REG4",
-                .id = ACT8865_ID_LDO4,
-                .ops = &act8865_ops,
-                .type = REGULATOR_VOLTAGE,
-                .n_voltages = ACT8865_VOLTAGE_NUM,
-                .linear_ranges = act8865_volatge_ranges,
-                .n_linear_ranges = ARRAY_SIZE(act8865_volatge_ranges),
-                .vsel_reg = ACT8865_LDO4_VSET,
-                .vsel_mask = ACT8865_VSEL_MASK,
-                .enable_reg = ACT8865_LDO4_CTRL,
-                .enable_mask = ACT8865_ENA,
-                .owner = THIS_MODULE,
-        },
+#define ACT88xx_REG(_name, _family, _id, _vsel_reg)                     \
+        [_family##_ID_##_id] = {                                        \
+                .name                   = _name,                        \
+                .id                     = _family##_ID_##_id,           \
+                .type                   = REGULATOR_VOLTAGE,            \
+                .ops                    = &act8865_ops,                 \
+                .n_voltages             = ACT8865_VOLTAGE_NUM,          \
+                .linear_ranges          = act8865_voltage_ranges,       \
+                .n_linear_ranges        = ARRAY_SIZE(act8865_voltage_ranges), \
+                .vsel_reg               = _family##_##_id##_##_vsel_reg, \
+                .vsel_mask              = ACT8865_VSEL_MASK,            \
+                .enable_reg             = _family##_##_id##_CTRL,       \
+                .enable_mask            = ACT8865_ENA,                  \
+                .owner                  = THIS_MODULE,                  \
+        }
+
+static const struct regulator_desc act8865_regulators[] = {
+        ACT88xx_REG("DCDC_REG1", ACT8865, DCDC1, VSET1),
+        ACT88xx_REG("DCDC_REG2", ACT8865, DCDC2, VSET1),
+        ACT88xx_REG("DCDC_REG3", ACT8865, DCDC3, VSET1),
+        ACT88xx_REG("LDO_REG1", ACT8865, LDO1, VSET),
+        ACT88xx_REG("LDO_REG2", ACT8865, LDO2, VSET),
+        ACT88xx_REG("LDO_REG3", ACT8865, LDO3, VSET),
+        ACT88xx_REG("LDO_REG4", ACT8865, LDO4, VSET),
 };
 
 #ifdef CONFIG_OF
 static const struct of_device_id act8865_dt_ids[] = {
-        { .compatible = "active-semi,act8865" },
+        { .compatible = "active-semi,act8865", .data = (void *)ACT8865 },
         { }
 };
 MODULE_DEVICE_TABLE(of, act8865_dt_ids);
@@ -206,7 +132,9 @@ static struct of_regulator_match act8865_matches[] = {
 
 static int act8865_pdata_from_dt(struct device *dev,
                                  struct device_node **of_node,
-                                 struct act8865_platform_data *pdata)
+                                 struct act8865_platform_data *pdata,
+                                 struct of_regulator_match *matches,
+                                 int num_matches)
 {
         int matched, i;
         struct device_node *np;
@@ -218,26 +146,25 @@ static int act8865_pdata_from_dt(struct device *dev,
                 return -EINVAL;
         }
 
-        matched = of_regulator_match(dev, np,
-                                act8865_matches, ARRAY_SIZE(act8865_matches));
+        matched = of_regulator_match(dev, np, matches, num_matches);
         of_node_put(np);
         if (matched <= 0)
                 return matched;
 
         pdata->regulators = devm_kzalloc(dev,
-                                sizeof(struct act8865_regulator_data) *
-                                ARRAY_SIZE(act8865_matches), GFP_KERNEL);
+                                         sizeof(struct act8865_regulator_data) *
+                                         num_matches, GFP_KERNEL);
         if (!pdata->regulators)
                 return -ENOMEM;
 
-        pdata->num_regulators = ARRAY_SIZE(act8865_matches);
+        pdata->num_regulators = num_matches;
         regulator = pdata->regulators;
 
-        for (i = 0; i < ARRAY_SIZE(act8865_matches); i++) {
+        for (i = 0; i < num_matches; i++) {
                 regulator->id = i;
-                regulator->name = act8865_matches[i].name;
-                regulator->platform_data = act8865_matches[i].init_data;
-                of_node[i] = act8865_matches[i].of_node;
+                regulator->name = matches[i].name;
+                regulator->platform_data = matches[i].init_data;
+                of_node[i] = matches[i].of_node;
                 regulator++;
         }
 
@@ -269,34 +196,59 @@ static struct regulator_init_data
 }
 
 static int act8865_pmic_probe(struct i2c_client *client,
-                           const struct i2c_device_id *i2c_id)
+                              const struct i2c_device_id *i2c_id)
 {
-        struct regulator_dev *rdev;
+        static const struct regulator_desc *regulators;
+        struct act8865_platform_data pdata_of, *pdata;
+        struct of_regulator_match *matches;
         struct device *dev = &client->dev;
-        struct act8865_platform_data *pdata = dev_get_platdata(dev);
-        struct regulator_config config = { };
+        struct device_node **of_node;
+        int i, ret, num_regulators;
         struct act8865 *act8865;
-        struct device_node *of_node[ACT8865_REG_NUM];
-        int i;
-        int ret;
+        unsigned long type;
+
+        pdata = dev_get_platdata(dev);
 
         if (dev->of_node && !pdata) {
                 const struct of_device_id *id;
-                struct act8865_platform_data pdata_of;
 
                 id = of_match_device(of_match_ptr(act8865_dt_ids), dev);
                 if (!id)
                         return -ENODEV;
 
-                ret = act8865_pdata_from_dt(dev, of_node, &pdata_of);
+                type = (unsigned long) id->data;
+        } else {
+                type = i2c_id->driver_data;
+        }
+
+        switch (type) {
+        case ACT8865:
+                matches = act8865_matches;
+                regulators = act8865_regulators;
+                num_regulators = ARRAY_SIZE(act8865_regulators);
+                break;
+        default:
+                dev_err(dev, "invalid device id %lu\n", type);
+                return -EINVAL;
+        }
+
+        of_node = devm_kzalloc(dev, sizeof(struct device_node *) *
+                               num_regulators, GFP_KERNEL);
+        if (!of_node)
+                return -ENOMEM;
+
+        if (dev->of_node && !pdata) {
+                ret = act8865_pdata_from_dt(dev, of_node, &pdata_of, matches,
+                                            num_regulators);
                 if (ret < 0)
                         return ret;
 
                 pdata = &pdata_of;
         }
 
-        if (pdata->num_regulators > ACT8865_REG_NUM) {
-                dev_err(dev, "Too many regulators found!\n");
+        if (pdata->num_regulators > num_regulators) {
+                dev_err(dev, "too many regulators: %d\n",
+                        pdata->num_regulators);
                 return -EINVAL;
         }
 
@@ -313,8 +265,10 @@ static int act8865_pmic_probe(struct i2c_client *client,
         }
 
         /* Finally register devices */
-        for (i = 0; i < ACT8865_REG_NUM; i++) {
-                const struct regulator_desc *desc = &act8865_reg[i];
+        for (i = 0; i < num_regulators; i++) {
+                const struct regulator_desc *desc = &regulators[i];
+                struct regulator_config config = { };
+                struct regulator_dev *rdev;
 
                 config.dev = dev;
                 config.init_data = act8865_get_init_data(desc->id, pdata);
@@ -330,12 +284,13 @@ static int act8865_pmic_probe(struct i2c_client *client,
         }
 
         i2c_set_clientdata(client, act8865);
+        devm_kfree(dev, of_node);
 
         return 0;
 }
 
 static const struct i2c_device_id act8865_ids[] = {
-        { "act8865", 0 },
+        { .name = "act8865", .driver_data = ACT8865 },
         { },
 };
 MODULE_DEVICE_TABLE(i2c, act8865_ids);
@@ -351,6 +306,6 @@ static struct i2c_driver act8865_pmic_driver = {
 
 module_i2c_driver(act8865_pmic_driver);
 
-MODULE_DESCRIPTION("active-semi act8865 voltage regulator driver");
+MODULE_DESCRIPTION("active-semi act88xx voltage regulator driver");
 MODULE_AUTHOR("Wenyou Yang <wenyou.yang@atmel.com>");
 MODULE_LICENSE("GPL v2");