[RFC,2/5] mfd: 88pm88x: initialize the regulators regmaps
Commit Message
From: Karel Balej <balejk@matfyz.cz>
The regulators registers are accessed via a different I2C address than
the already implemented functionality. Initialize the new regmap for the
regulator driver to use. For 88PM886 the buck regmap is the same as LDO
regmap, however this is not the case for 88PM880.
Signed-off-by: Karel Balej <balejk@matfyz.cz>
---
drivers/mfd/88pm88x.c | 33 +++++++++++++++++++++++++++++++++
include/linux/mfd/88pm88x.h | 4 ++++
2 files changed, 37 insertions(+)
@@ -98,6 +98,35 @@ static int pm88x_power_off_handler(struct sys_off_data *data)
return NOTIFY_DONE;
}
+static int pm88x_initialize_subregmaps(struct pm88x_chip *chip)
+{
+ struct i2c_client *page;
+ struct regmap *regmap;
+ int ret;
+
+ /* LDO page */
+ page = devm_i2c_new_dummy_device(&chip->client->dev, chip->client->adapter,
+ chip->client->addr + PM88X_PAGE_OFFSET_LDO);
+ if (IS_ERR(page)) {
+ ret = PTR_ERR(page);
+ dev_err(&chip->client->dev, "Failed to initialize LDO client: %d\n",
+ ret);
+ return ret;
+ }
+ regmap = devm_regmap_init_i2c(page, &pm88x_i2c_regmap);
+ if (IS_ERR(regmap)) {
+ ret = PTR_ERR(regmap);
+ dev_err(&chip->client->dev, "Failed to initialize LDO regmap: %d\n",
+ ret);
+ return ret;
+ }
+ chip->regmaps[PM88X_REGMAP_LDO] = regmap;
+ /* buck regmap is the same as LDO */
+ chip->regmaps[PM88X_REGMAP_BUCK] = regmap;
+
+ return 0;
+}
+
static int pm88x_setup_irq(struct pm88x_chip *chip)
{
int ret;
@@ -155,6 +184,10 @@ static int pm88x_probe(struct i2c_client *client)
return -EINVAL;
}
+ ret = pm88x_initialize_subregmaps(chip);
+ if (ret)
+ return ret;
+
ret = pm88x_setup_irq(chip);
if (ret)
return ret;
@@ -39,8 +39,12 @@
#define PM88X_REG_AON_CTRL2 0xe2
+#define PM88X_PAGE_OFFSET_LDO 1
+
enum pm88x_regmap_index {
PM88X_REGMAP_BASE,
+ PM88X_REGMAP_LDO,
+ PM88X_REGMAP_BUCK,
PM88X_REGMAP_NR
};