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path: root/drivers/regulator/tps51632-regulator.c
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Diffstat (limited to 'drivers/regulator/tps51632-regulator.c')
-rw-r--r--drivers/regulator/tps51632-regulator.c152
1 files changed, 103 insertions, 49 deletions
diff --git a/drivers/regulator/tps51632-regulator.c b/drivers/regulator/tps51632-regulator.c
index ab21133e6784..6e67be75ea1b 100644
--- a/drivers/regulator/tps51632-regulator.c
+++ b/drivers/regulator/tps51632-regulator.c
@@ -28,10 +28,13 @@
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
+#include <linux/regulator/of_regulator.h>
#include <linux/regulator/tps51632-regulator.h>
#include <linux/slab.h>
@@ -85,49 +88,8 @@ struct tps51632_chip {
struct regulator_desc desc;
struct regulator_dev *rdev;
struct regmap *regmap;
- bool enable_pwm_dvfs;
};
-static int tps51632_dcdc_get_voltage_sel(struct regulator_dev *rdev)
-{
- struct tps51632_chip *tps = rdev_get_drvdata(rdev);
- unsigned int data;
- int ret;
- unsigned int reg = TPS51632_VOLTAGE_SELECT_REG;
- int vsel;
-
- if (tps->enable_pwm_dvfs)
- reg = TPS51632_VOLTAGE_BASE_REG;
-
- ret = regmap_read(tps->regmap, reg, &data);
- if (ret < 0) {
- dev_err(tps->dev, "reg read failed, err %d\n", ret);
- return ret;
- }
-
- vsel = data & TPS51632_VOUT_MASK;
- return vsel;
-}
-
-static int tps51632_dcdc_set_voltage_sel(struct regulator_dev *rdev,
- unsigned selector)
-{
- struct tps51632_chip *tps = rdev_get_drvdata(rdev);
- int ret;
- unsigned int reg = TPS51632_VOLTAGE_SELECT_REG;
-
- if (tps->enable_pwm_dvfs)
- reg = TPS51632_VOLTAGE_BASE_REG;
-
- if (selector > TPS51632_MAX_VSEL)
- return -EINVAL;
-
- ret = regmap_write(tps->regmap, reg, selector);
- if (ret < 0)
- dev_err(tps->dev, "reg write failed, err %d\n", ret);
- return ret;
-}
-
static int tps51632_dcdc_set_ramp_delay(struct regulator_dev *rdev,
int ramp_delay)
{
@@ -144,8 +106,8 @@ static int tps51632_dcdc_set_ramp_delay(struct regulator_dev *rdev,
}
static struct regulator_ops tps51632_dcdc_ops = {
- .get_voltage_sel = tps51632_dcdc_get_voltage_sel,
- .set_voltage_sel = tps51632_dcdc_set_voltage_sel,
+ .get_voltage_sel = regulator_get_voltage_sel_regmap,
+ .set_voltage_sel = regulator_set_voltage_sel_regmap,
.list_voltage = regulator_list_voltage_linear,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.set_ramp_delay = tps51632_dcdc_set_ramp_delay,
@@ -162,7 +124,6 @@ static int tps51632_init_dcdc(struct tps51632_chip *tps,
goto skip_pwm_config;
control |= TPS51632_DVFS_PWMEN;
- tps->enable_pwm_dvfs = pdata->enable_pwm_dvfs;
vsel = TPS51632_VOLT_VSEL(pdata->base_voltage_uV);
ret = regmap_write(tps->regmap, TPS51632_VOLTAGE_BASE_REG, vsel);
if (ret < 0) {
@@ -205,22 +166,96 @@ skip_pwm_config:
return ret;
}
-static bool rd_wr_reg(struct device *dev, unsigned int reg)
+static bool is_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS51632_OFFSET_REG:
+ case TPS51632_FAULT_REG:
+ case TPS51632_IMON_REG:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool is_read_reg(struct device *dev, unsigned int reg)
{
- if ((reg >= 0x8) && (reg <= 0x10))
+ switch (reg) {
+ case 0x08 ... 0x0F:
return false;
- return true;
+ default:
+ return true;
+ }
+}
+
+static bool is_write_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case TPS51632_VOLTAGE_SELECT_REG:
+ case TPS51632_VOLTAGE_BASE_REG:
+ case TPS51632_VMAX_REG:
+ case TPS51632_DVFS_CONTROL_REG:
+ case TPS51632_POWER_STATE_REG:
+ case TPS51632_SLEW_REGS:
+ return true;
+ default:
+ return false;
+ }
}
static const struct regmap_config tps51632_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
- .writeable_reg = rd_wr_reg,
- .readable_reg = rd_wr_reg,
+ .writeable_reg = is_write_reg,
+ .readable_reg = is_read_reg,
+ .volatile_reg = is_volatile_reg,
.max_register = TPS51632_MAX_REG - 1,
.cache_type = REGCACHE_RBTREE,
};
+#if defined(CONFIG_OF)
+static const struct of_device_id tps51632_of_match[] = {
+ { .compatible = "ti,tps51632",},
+ {},
+};
+MODULE_DEVICE_TABLE(of, tps51632_of_match);
+
+static struct tps51632_regulator_platform_data *
+ of_get_tps51632_platform_data(struct device *dev)
+{
+ struct tps51632_regulator_platform_data *pdata;
+ struct device_node *np = dev->of_node;
+
+ pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+ if (!pdata) {
+ dev_err(dev, "Memory alloc failed for platform data\n");
+ return NULL;
+ }
+
+ pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node);
+ if (!pdata->reg_init_data) {
+ dev_err(dev, "Not able to get OF regulator init data\n");
+ return NULL;
+ }
+
+ pdata->enable_pwm_dvfs =
+ of_property_read_bool(np, "ti,enable-pwm-dvfs");
+ pdata->dvfs_step_20mV = of_property_read_bool(np, "ti,dvfs-step-20mV");
+
+ pdata->base_voltage_uV = pdata->reg_init_data->constraints.min_uV ? :
+ TPS51632_MIN_VOLATGE;
+ pdata->max_voltage_uV = pdata->reg_init_data->constraints.max_uV ? :
+ TPS51632_MAX_VOLATGE;
+ return pdata;
+}
+#else
+static struct tps51632_regulator_platform_data *
+ of_get_tps51632_platform_data(struct device *dev)
+{
+ return NULL;
+}
+#endif
+
static int tps51632_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
@@ -230,7 +265,19 @@ static int tps51632_probe(struct i2c_client *client,
int ret;
struct regulator_config config = { };
+ if (client->dev.of_node) {
+ const struct of_device_id *match;
+ match = of_match_device(of_match_ptr(tps51632_of_match),
+ &client->dev);
+ if (!match) {
+ dev_err(&client->dev, "Error: No device match found\n");
+ return -ENODEV;
+ }
+ }
+
pdata = client->dev.platform_data;
+ if (!pdata && client->dev.of_node)
+ pdata = of_get_tps51632_platform_data(&client->dev);
if (!pdata) {
dev_err(&client->dev, "No Platform data\n");
return -EINVAL;
@@ -269,6 +316,12 @@ static int tps51632_probe(struct i2c_client *client,
tps->desc.type = REGULATOR_VOLTAGE;
tps->desc.owner = THIS_MODULE;
+ if (pdata->enable_pwm_dvfs)
+ tps->desc.vsel_reg = TPS51632_VOLTAGE_BASE_REG;
+ else
+ tps->desc.vsel_reg = TPS51632_VOLTAGE_SELECT_REG;
+ tps->desc.vsel_mask = TPS51632_VOUT_MASK;
+
tps->regmap = devm_regmap_init_i2c(client, &tps51632_regmap_config);
if (IS_ERR(tps->regmap)) {
ret = PTR_ERR(tps->regmap);
@@ -319,6 +372,7 @@ static struct i2c_driver tps51632_i2c_driver = {
.driver = {
.name = "tps51632",
.owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(tps51632_of_match),
},
.probe = tps51632_probe,
.remove = tps51632_remove,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.