[PATCH V4 03/10] regulator: da9121: Add device variants

[Adam Ward]

Add basic support for configuration to reference variants of this device,
and track the selected variant within the driver.

Signed-off-by: Adam Ward <adam.ward.opensou...@diasemi.com>
---
 drivers/regulator/da9121-regulator.c | 46 +++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/drivers/regulator/da9121-regulator.c 
b/drivers/regulator/da9121-regulator.c
index c11fe04..5bebdb2 100644
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -11,6 +11,12 @@
 #include <linux/i2c.h>
 #include "da9121-regulator.h"
 
+/* Chip data */
+struct da9121 {
+       struct device *dev;
+       int variant_id;
+};
+
 #define DA9121_MIN_MV          300
 #define DA9121_MAX_MV          1900
 #define DA9121_STEP_MV         10
@@ -53,19 +59,46 @@
 };
 
 static const struct of_device_id da9121_dt_ids[] = {
-       { .compatible = "dlg,da9121", },
+       { .compatible = "dlg,da9121", .data = (void *) 
DA9121_TYPE_DA9121_DA9130 },
+       { .compatible = "dlg,da9130", .data = (void *) 
DA9121_TYPE_DA9121_DA9130 },
+       { .compatible = "dlg,da9217", .data = (void *) DA9121_TYPE_DA9217 },
+       { .compatible = "dlg,da9122", .data = (void *) 
DA9121_TYPE_DA9122_DA9131 },
+       { .compatible = "dlg,da9131", .data = (void *) 
DA9121_TYPE_DA9122_DA9131 },
+       { .compatible = "dlg,da9220", .data = (void *) 
DA9121_TYPE_DA9220_DA9132 },
+       { .compatible = "dlg,da9132", .data = (void *) 
DA9121_TYPE_DA9220_DA9132 },
        { }
 };
 MODULE_DEVICE_TABLE(of, da9121_dt_ids);
 
+static inline int da9121_of_get_id(struct device *dev)
+{
+       const struct of_device_id *id = of_match_device(da9121_dt_ids, dev);
+
+       if (!id) {
+               dev_err(dev, "%s: Failed\n", __func__);
+               return -EINVAL;
+       }
+       return (uintptr_t)id->data;
+}
+
 static int da9121_i2c_probe(struct i2c_client *i2c,
                            const struct i2c_device_id *id)
 {
+       struct da9121 *chip;
+       int ret = 0;
        struct device *dev = &i2c->dev;
        struct regulator_config config = {};
        struct regulator_dev *rdev;
        struct regmap *regmap;
 
+       chip = devm_kzalloc(&i2c->dev, sizeof(struct da9121), GFP_KERNEL);
+       if (!chip) {
+               ret = -ENOMEM;
+               goto error;
+       }
+
+       chip->variant_id = da9121_of_get_id(&i2c->dev);
+
        regmap = devm_regmap_init_i2c(i2c, &da9121_regmap_config);
        if (IS_ERR(regmap))
                return PTR_ERR(regmap);
@@ -80,11 +113,18 @@ static int da9121_i2c_probe(struct i2c_client *i2c,
                return PTR_ERR(rdev);
        }
 
-       return 0;
+error:
+       return ret;
 }
 
 static const struct i2c_device_id da9121_i2c_id[] = {
-       { "da9121", 0 },
+       {"da9121", DA9121_TYPE_DA9121_DA9130},
+       {"da9130", DA9121_TYPE_DA9121_DA9130},
+       {"da9217", DA9121_TYPE_DA9217},
+       {"da9122", DA9121_TYPE_DA9122_DA9131},
+       {"da9131", DA9121_TYPE_DA9122_DA9131},
+       {"da9220", DA9121_TYPE_DA9220_DA9132},
+       {"da9132", DA9121_TYPE_DA9220_DA9132},
        {},
 };
 MODULE_DEVICE_TABLE(i2c, da9121_i2c_id);
-- 
1.9.1