[PATCH V2] regulator: DA9211 : support DA9213
From: James Ban
Date: Fri Aug 08 2014 - 01:42:36 EST
This is a patch for supporting DA9213.
Signed-off-by: James Ban <james.ban.opensource@xxxxxxxxxxx>
---
This patch is relative to linux-next repository tag next-20140807.
Changes in V2:
- Changed a method for selecting driver table.
drivers/regulator/Kconfig | 9 ++--
drivers/regulator/da9211-regulator.c | 95 +++++++++++++++++++++++++++-------
drivers/regulator/da9211-regulator.h | 7 ++-
include/linux/regulator/da9211.h | 7 ++-
4 files changed, 91 insertions(+), 27 deletions(-)
diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
index 2dc8289..1344aa8 100644
--- a/drivers/regulator/Kconfig
+++ b/drivers/regulator/Kconfig
@@ -199,13 +199,14 @@ config REGULATOR_DA9210
interface.
config REGULATOR_DA9211
- tristate "Dialog Semiconductor DA9211/DA9212 regulator"
+ tristate "Dialog Semiconductor DA9211/DA9212/DA9213/DA9214 regulator"
depends on I2C
select REGMAP_I2C
help
- Say y here to support for the Dialog Semiconductor DA9211/DA9212.
- The DA9211/DA9212 is a multi-phase synchronous step down
- converter 12A DC-DC Buck controlled through an I2C
+ Say y here to support for the Dialog Semiconductor DA9211/DA9212
+ /DA9213/DA9214.
+ The DA9211/DA9212/DA9213/DA9214 is a multi-phase synchronous
+ step down converter 12A or 16A DC-DC Buck controlled through an I2C
interface.
config REGULATOR_DBX500_PRCMU
diff --git a/drivers/regulator/da9211-regulator.c b/drivers/regulator/da9211-regulator.c
index 1482ada..ccc2e36 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@xxxxxxxxxxx>");
-MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211");
+MODULE_DESCRIPTION("Regulator device driver for Dialog DA9211/DA9213");
MODULE_LICENSE("GPL v2");
diff --git a/drivers/regulator/da9211-regulator.h b/drivers/regulator/da9211-regulator.h
index 88b1769..93fa9df 100644
--- a/drivers/regulator/da9211-regulator.h
+++ b/drivers/regulator/da9211-regulator.h
@@ -1,5 +1,5 @@
/*
- * da9211-regulator.h - Regulator definitions for DA9211
+ * da9211-regulator.h - Regulator definitions for DA9211/DA9213
* Copyright (C) 2014 Dialog Semiconductor Ltd.
*
* This library is free software; you can redistribute it and/or
@@ -53,12 +53,15 @@
/* BUCK Phase Selection*/
#define DA9211_REG_CONFIG_E 0x147
+/* Device ID */
+#define DA9211_REG_DEVICE_ID 0x201
+
/*
* Registers bits
*/
/* DA9211_REG_PAGE_CON (addr=0x00) */
#define DA9211_REG_PAGE_SHIFT 1
-#define DA9211_REG_PAGE_MASK 0x02
+#define DA9211_REG_PAGE_MASK 0x06
/* On I2C registers 0x00 - 0xFF */
#define DA9211_REG_PAGE0 0
/* On I2C registers 0x100 - 0x1FF */
diff --git a/include/linux/regulator/da9211.h b/include/linux/regulator/da9211.h
index 0981ce0..658c3c3 100644
--- a/include/linux/regulator/da9211.h
+++ b/include/linux/regulator/da9211.h
@@ -1,5 +1,5 @@
/*
- * da9211.h - Regulator device driver for DA9211
+ * da9211.h - Regulator device driver for DA9211/DA9213
* Copyright (C) 2014 Dialog Semiconductor Ltd.
*
* This library is free software; you can redistribute it and/or
@@ -20,6 +20,11 @@
#define DA9211_MAX_REGULATORS 2
+enum da9211_chip_id {
+ DA9211,
+ DA9213,
+};
+
struct da9211_pdata {
/*
* Number of buck
--
end-of-patch for regulator: DA9211 : support DA9213 V2
--
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