regulator: da9211: support DA9213

This is a patch for supporting DA9213.

Signed-off-by: James Ban <james.ban.opensource@diasemi.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

1 files changed, 75 insertions, 20 deletions

diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index 1482adafa1ad..ccc2e362d751 100644
--- a/drivers/regulator/da9211-regulator.c
+++ b/drivers/regulator/da9211-regulator.c
@@ -1,5 +1,5 @@
 /*
- * da9211-regulator.c - Regulator device driver for DA9211
+ * da9211-regulator.c - Regulator device driver for DA9211/DA9213
  * Copyright (C) 2014  Dialog Semiconductor Ltd.
  *
  * This library is free software; you can redistribute it and/or
@@ -27,6 +27,10 @@
 #include <linux/regulator/da9211.h>
 #include "da9211-regulator.h"
 
+/* DEVICE IDs */
+#define DA9211_DEVICE_ID        0x22
+#define DA9213_DEVICE_ID        0x23
+
 #define DA9211_BUCK_MODE_SLEEP  1
 #define DA9211_BUCK_MODE_SYNC   2
 #define DA9211_BUCK_MODE_AUTO   3
@@ -42,6 +46,7 @@ struct da9211 {
         struct regulator_dev *rdev[DA9211_MAX_REGULATORS];
         int num_regulator;
         int chip_irq;
+        int chip_id;
 };
 
 static const struct regmap_range_cfg da9211_regmap_range[] = {
@@ -52,14 +57,14 @@ static const struct regmap_range_cfg da9211_regmap_range[] = {
                 .window_start = 0,
                 .window_len = 256,
                 .range_min = 0,
-                .range_max = 2*256,
+                .range_max = 5*128,
         },
 };
 
 static const struct regmap_config da9211_regmap_config = {
         .reg_bits = 8,
         .val_bits = 8,
-        .max_register = 2 * 256,
+        .max_register = 5 * 128,
         .ranges = da9211_regmap_range,
         .num_ranges = ARRAY_SIZE(da9211_regmap_range),
 };
@@ -69,11 +74,20 @@ static const struct regmap_config da9211_regmap_config = {
 #define DA9211_MAX_MV           1570
 #define DA9211_STEP_MV          10
 
-/* Current limits for buck (uA) indices corresponds with register values */
+/* Current limits for DA9211 buck (uA) indices
+ * corresponds with register values
+ */
 static const int da9211_current_limits[] = {
         2000000, 2200000, 2400000, 2600000, 2800000, 3000000, 3200000, 3400000,
         3600000, 3800000, 4000000, 4200000, 4400000, 4600000, 4800000, 5000000
 };
+/* Current limits for DA9213 buck (uA) indices
+ * corresponds with register values
+ */
+static const int da9213_current_limits[] = {
+        3000000, 3200000, 3400000, 3600000, 3800000, 4000000, 4200000, 4400000,
+        4600000, 4800000, 5000000, 5200000, 5400000, 5600000, 5800000, 6000000
+};
 
 static unsigned int da9211_buck_get_mode(struct regulator_dev *rdev)
 {
@@ -129,12 +143,26 @@ static int da9211_set_current_limit(struct regulator_dev *rdev, int min,
 {
         int id = rdev_get_id(rdev);
         struct da9211 *chip = rdev_get_drvdata(rdev);
-        int i;
+        int i, max_size;
+        const int *current_limits;
+
+        switch (chip->chip_id) {
+        case DA9211:
+                current_limits = da9211_current_limits;
+                max_size = ARRAY_SIZE(da9211_current_limits)-1;
+                break;
+        case DA9213:
+                current_limits = da9213_current_limits;
+                max_size = ARRAY_SIZE(da9213_current_limits)-1;
+                break;
+        default:
+                return -EINVAL;
+        }
 
         /* search for closest to maximum */
-        for (i = ARRAY_SIZE(da9211_current_limits)-1; i >= 0; i--) {
-                if (min <= da9211_current_limits[i] &&
-                    max >= da9211_current_limits[i]) {
+        for (i = max_size; i >= 0; i--) {
+                if (min <= current_limits[i] &&
+                    max >= current_limits[i]) {
                                 return regmap_update_bits(chip->regmap,
                                         DA9211_REG_BUCK_ILIM,
                                         (0x0F << id*4), (i << id*4));
@@ -150,14 +178,28 @@ static int da9211_get_current_limit(struct regulator_dev *rdev)
         struct da9211 *chip = rdev_get_drvdata(rdev);
         unsigned int data;
         int ret;
+        const int *current_limits;
+
+        switch (chip->chip_id) {
+        case DA9211:
+                current_limits = da9211_current_limits;
+                break;
+        case DA9213:
+                current_limits = da9213_current_limits;
+                break;
+        default:
+                return -EINVAL;
+        }
 
         ret = regmap_read(chip->regmap, DA9211_REG_BUCK_ILIM, &data);
         if (ret < 0)
                 return ret;
 
-        /* select one of 16 values: 0000 (2000mA) to 1111 (5000mA) */
+        /* select one of 16 values: 0000 (2000mA or 3000mA)
+         * to 1111 (5000mA or 6000mA).
+         */
         data = (data >> id*4) & 0x0F;
-        return da9211_current_limits[data];
+        return current_limits[data];
 }
 
 static struct regulator_ops da9211_buck_ops = {
@@ -264,10 +306,7 @@ static int da9211_regulator_init(struct da9211 *chip)
         }
 
         for (i = 0; i < chip->num_regulator; i++) {
-                if (chip->pdata)
-                        config.init_data =
-                                &(chip->pdata->init_data[i]);
-
+                config.init_data = &(chip->pdata->init_data[i]);
                 config.dev = chip->dev;
                 config.driver_data = chip;
                 config.regmap = chip->regmap;
@@ -301,6 +340,7 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
 {
         struct da9211 *chip;
         int error, ret;
+        unsigned int data;
 
         chip = devm_kzalloc(&i2c->dev, sizeof(struct da9211), GFP_KERNEL);
 
@@ -308,7 +348,7 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
         chip->regmap = devm_regmap_init_i2c(i2c, &da9211_regmap_config);
         if (IS_ERR(chip->regmap)) {
                 error = PTR_ERR(chip->regmap);
-                dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
+                dev_err(chip->dev, "Failed to allocate register map: %d\n",
                         error);
                 return error;
         }
@@ -316,8 +356,22 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
         i2c_set_clientdata(i2c, chip);
 
         chip->pdata = i2c->dev.platform_data;
-        if (!chip->pdata) {
-                dev_err(&i2c->dev, "No platform init data supplied\n");
+
+        ret = regmap_read(chip->regmap, DA9211_REG_DEVICE_ID, &data);
+        if (ret < 0) {
+                dev_err(chip->dev, "Failed to read DEVICE_ID reg: %d\n", ret);
+                return ret;
+        }
+
+        switch (data) {
+        case DA9211_DEVICE_ID:
+                chip->chip_id = DA9211;
+                break;
+        case DA9213_DEVICE_ID:
+                chip->chip_id = DA9213;
+                break;
+        default:
+                dev_err(chip->dev, "Unsupported device id = 0x%x.\n", data);
                 return -ENODEV;
         }
 
@@ -340,13 +394,14 @@ static int da9211_i2c_probe(struct i2c_client *i2c,
         ret = da9211_regulator_init(chip);
 
         if (ret < 0)
-                dev_err(&i2c->dev, "Failed to initialize regulator: %d\n", ret);
+                dev_err(chip->dev, "Failed to initialize regulator: %d\n", ret);
 
         return ret;
 }
 
 static const struct i2c_device_id da9211_i2c_id[] = {
-        {"da9211", 0},
+        {"da9211", DA9211},
+        {"da9213", DA9213},
         {},
 };
 
@@ -364,5 +419,5 @@ static struct i2c_driver da9211_regulator_driver = {
 module_i2c_driver(da9211_regulator_driver);
 
 MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>");
-MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211");
+MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211/DA9213");
 MODULE_LICENSE("GPL v2");