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path: root/drivers/regulator/da9211-regulator.c
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Diffstat (limited to 'drivers/regulator/da9211-regulator.c')
-rw-r--r--drivers/regulator/da9211-regulator.c174
1 files changed, 152 insertions, 22 deletions
diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index 1482adafa1ad..c78d2106d6cb 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
@@ -24,9 +24,14 @@
#include <linux/regmap.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
+#include <linux/regulator/of_regulator.h>
#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 +47,7 @@ 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 +58,14 @@ 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 +75,20 @@ 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 +144,26 @@ 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 +179,28 @@ 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 = {
@@ -194,6 +237,59 @@ static struct regulator_desc da9211_regulators[] = {
DA9211_BUCK(BUCKB),
};
+#ifdef CONFIG_OF
+static struct of_regulator_match da9211_matches[] = {
+ [DA9211_ID_BUCKA] = { .name = "BUCKA" },
+ [DA9211_ID_BUCKB] = { .name = "BUCKB" },
+ };
+
+static struct da9211_pdata *da9211_parse_regulators_dt(
+ struct device *dev)
+{
+ struct da9211_pdata *pdata;
+ struct device_node *node;
+ int i, num, n;
+
+ node = of_get_child_by_name(dev->of_node, "regulators");
+ if (!node) {
+ dev_err(dev, "regulators node not found\n");
+ return ERR_PTR(-ENODEV);
+ }
+
+ num = of_regulator_match(dev, node, da9211_matches,
+ ARRAY_SIZE(da9211_matches));
+ of_node_put(node);
+ if (num < 0) {
+ dev_err(dev, "Failed to match regulators\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata)
+ return ERR_PTR(-ENOMEM);
+
+ pdata->num_buck = num;
+
+ n = 0;
+ for (i = 0; i < ARRAY_SIZE(da9211_matches); i++) {
+ if (!da9211_matches[i].init_data)
+ continue;
+
+ pdata->init_data[n] = da9211_matches[i].init_data;
+
+ n++;
+ }
+
+ return pdata;
+}
+#else
+static struct da9211_pdata *da9211_parse_regulators_dt(
+ struct device *dev)
+{
+ return ERR_PTR(-ENODEV);
+}
+#endif
+
static irqreturn_t da9211_irq_handler(int irq, void *data)
{
struct da9211 *chip = data;
@@ -264,13 +360,11 @@ 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;
+ config.of_node = chip->dev->of_node;
chip->rdev[i] = devm_regulator_register(chip->dev,
&da9211_regulators[i], &config);
@@ -282,7 +376,7 @@ static int da9211_regulator_init(struct da9211 *chip)
if (chip->chip_irq != 0) {
ret = regmap_update_bits(chip->regmap,
- DA9211_REG_MASK_B, DA9211_M_OV_CURR_A << i, 1);
+ DA9211_REG_MASK_B, DA9211_M_OV_CURR_A << i, 0);
if (ret < 0) {
dev_err(chip->dev,
"Failed to update mask reg: %d\n", ret);
@@ -293,6 +387,7 @@ static int da9211_regulator_init(struct da9211 *chip)
return 0;
}
+
/*
* I2C driver interface functions
*/
@@ -301,14 +396,17 @@ 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);
+ if (!chip)
+ return -ENOMEM;
chip->dev = &i2c->dev;
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;
}
@@ -316,11 +414,33 @@ 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;
}
+ if (!chip->pdata)
+ chip->pdata = da9211_parse_regulators_dt(chip->dev);
+
+ if (IS_ERR(chip->pdata)) {
+ dev_err(chip->dev, "No regulators defined for the platform\n");
+ return PTR_ERR(chip->pdata);
+ }
+
chip->chip_irq = i2c->irq;
if (chip->chip_irq != 0) {
@@ -340,22 +460,32 @@ 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},
{},
};
-
MODULE_DEVICE_TABLE(i2c, da9211_i2c_id);
+#ifdef CONFIG_OF
+static const struct of_device_id da9211_dt_ids[] = {
+ { .compatible = "dlg,da9211", .data = &da9211_i2c_id[0] },
+ { .compatible = "dlg,da9213", .data = &da9211_i2c_id[1] },
+ {},
+};
+MODULE_DEVICE_TABLE(of, da9211_dt_ids);
+#endif
+
static struct i2c_driver da9211_regulator_driver = {
.driver = {
.name = "da9211",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(da9211_dt_ids),
},
.probe = da9211_i2c_probe,
.id_table = da9211_i2c_id,
@@ -364,5 +494,5 @@ 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");
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