[PATCH] regulator: da9121: automotive variants identity fix
From: Adam Ward
Date: Wed Apr 21 2021 - 07:32:16 EST
This patch fixes identification of DA913x parts by the DA9121 driver,
where a lack of clarity lead to implementation on the basis that variant
IDs were to be identical to the equivalent rated non-automotive parts.
There is a new emphasis on the DT identity to cope with overlap in these
ID's - this is not considered to be problematic, because projects would
be exclusively using automotive or consumer grade parts.
Signed-off-by: Adam Ward <Adam.Ward.opensource@xxxxxxxxxxx>
---
drivers/regulator/da9121-regulator.c | 80 ++++++++++++++++++----------
drivers/regulator/da9121-regulator.h | 13 +++++
2 files changed, 65 insertions(+), 28 deletions(-)
diff --git a/drivers/regulator/da9121-regulator.c b/drivers/regulator/da9121-regulator.c
index a2ede7d7897e..0ccf3caf41d2 100644
--- a/drivers/regulator/da9121-regulator.c
+++ b/drivers/regulator/da9121-regulator.c
@@ -40,6 +40,7 @@ struct da9121 {
unsigned int passive_delay;
int chip_irq;
int variant_id;
+ int subvariant_id;
};
/* Define ranges for different variants, enabling translation to/from
@@ -812,7 +813,6 @@ static struct regmap_config da9121_2ch_regmap_config = {
static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
{
u32 device_id;
- u8 chip_id = chip->variant_id;
u32 variant_id;
u8 variant_mrc, variant_vrc;
char *type;
@@ -839,22 +839,34 @@ static int da9121_check_device_type(struct i2c_client *i2c, struct da9121 *chip)
variant_vrc = variant_id & DA9121_MASK_OTP_VARIANT_ID_VRC;
- switch (variant_vrc) {
- case DA9121_VARIANT_VRC:
- type = "DA9121/DA9130";
- config_match = (chip_id == DA9121_TYPE_DA9121_DA9130);
+ switch (chip->subvariant_id) {
+ case DA9121_SUBTYPE_DA9121:
+ type = "DA9121";
+ config_match = (variant_vrc == DA9121_VARIANT_VRC);
break;
- case DA9220_VARIANT_VRC:
- type = "DA9220/DA9132";
- config_match = (chip_id == DA9121_TYPE_DA9220_DA9132);
+ case DA9121_SUBTYPE_DA9130:
+ type = "DA9130";
+ config_match = (variant_vrc == DA9130_VARIANT_VRC);
break;
- case DA9122_VARIANT_VRC:
- type = "DA9122/DA9131";
- config_match = (chip_id == DA9121_TYPE_DA9122_DA9131);
+ case DA9121_SUBTYPE_DA9220:
+ type = "DA9220";
+ config_match = (variant_vrc == DA9220_VARIANT_VRC);
break;
- case DA9217_VARIANT_VRC:
+ case DA9121_SUBTYPE_DA9132:
+ type = "DA9132";
+ config_match = (variant_vrc == DA9132_VARIANT_VRC);
+ break;
+ case DA9121_SUBTYPE_DA9122:
+ type = "DA9122";
+ config_match = (variant_vrc == DA9122_VARIANT_VRC);
+ break;
+ case DA9121_SUBTYPE_DA9131:
+ type = "DA9131";
+ config_match = (variant_vrc == DA9131_VARIANT_VRC);
+ break;
+ case DA9121_SUBTYPE_DA9217:
type = "DA9217";
- config_match = (chip_id == DA9121_TYPE_DA9217);
+ config_match = (variant_vrc == DA9217_VARIANT_VRC);
break;
default:
type = "Unknown";
@@ -892,15 +904,27 @@ static int da9121_assign_chip_model(struct i2c_client *i2c,
chip->dev = &i2c->dev;
- switch (chip->variant_id) {
- case DA9121_TYPE_DA9121_DA9130:
- fallthrough;
- case DA9121_TYPE_DA9217:
+ /* Use configured subtype to select the regulator descriptor index and
+ * register map, common to both consumer and automotive grade variants
+ */
+ switch (chip->subvariant_id) {
+ case DA9121_SUBTYPE_DA9121:
+ case DA9121_SUBTYPE_DA9130:
+ chip->variant_id = DA9121_TYPE_DA9121_DA9130;
regmap = &da9121_1ch_regmap_config;
break;
- case DA9121_TYPE_DA9122_DA9131:
- fallthrough;
- case DA9121_TYPE_DA9220_DA9132:
+ case DA9121_SUBTYPE_DA9217:
+ chip->variant_id = DA9121_TYPE_DA9217;
+ regmap = &da9121_1ch_regmap_config;
+ break;
+ case DA9121_SUBTYPE_DA9122:
+ case DA9121_SUBTYPE_DA9131:
+ chip->variant_id = DA9121_TYPE_DA9122_DA9131;
+ regmap = &da9121_2ch_regmap_config;
+ break;
+ case DA9121_TYPE_DA9220:
+ case DA9121_TYPE_DA9132:
+ chip->variant_id = DA9121_TYPE_DA9220_DA9132;
regmap = &da9121_2ch_regmap_config;
break;
}
@@ -975,13 +999,13 @@ static int da9121_config_irq(struct i2c_client *i2c,
}
static const struct of_device_id da9121_dt_ids[] = {
- { .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 },
+ { .compatible = "dlg,da9121", .data = (void *) DA9121_SUBTYPE_DA9121 },
+ { .compatible = "dlg,da9130", .data = (void *) DA9121_SUBTYPE_DA9130 },
+ { .compatible = "dlg,da9217", .data = (void *) DA9121_SUBTYPE_DA9217 },
+ { .compatible = "dlg,da9122", .data = (void *) DA9121_SUBTYPE_DA9122 },
+ { .compatible = "dlg,da9131", .data = (void *) DA9121_SUBTYPE_DA9131 },
+ { .compatible = "dlg,da9220", .data = (void *) DA9121_SUBTYPE_DA9220 },
+ { .compatible = "dlg,da9132", .data = (void *) DA9121_SUBTYPE_DA9132 },
{ }
};
MODULE_DEVICE_TABLE(of, da9121_dt_ids);
@@ -1011,7 +1035,7 @@ static int da9121_i2c_probe(struct i2c_client *i2c,
}
chip->pdata = i2c->dev.platform_data;
- chip->variant_id = da9121_of_get_id(&i2c->dev);
+ chip->subvariant_id = da9121_of_get_id(&i2c->dev);
ret = da9121_assign_chip_model(i2c, chip);
if (ret < 0)
diff --git a/drivers/regulator/da9121-regulator.h b/drivers/regulator/da9121-regulator.h
index 3c34cb889ca8..357f416e17c1 100644
--- a/drivers/regulator/da9121-regulator.h
+++ b/drivers/regulator/da9121-regulator.h
@@ -29,6 +29,16 @@ enum da9121_variant {
DA9121_TYPE_DA9217
};
+enum da9121_subvariant {
+ DA9121_SUBTYPE_DA9121,
+ DA9121_SUBTYPE_DA9130,
+ DA9121_SUBTYPE_DA9220,
+ DA9121_SUBTYPE_DA9132,
+ DA9121_SUBTYPE_DA9122,
+ DA9121_SUBTYPE_DA9131,
+ DA9121_SUBTYPE_DA9217
+};
+
/* Minimum, maximum and default polling millisecond periods are provided
* here as an example. It is expected that any final implementation will
* include a modification of these settings to match the required
@@ -279,6 +289,9 @@ enum da9121_variant {
#define DA9220_VARIANT_VRC 0x0
#define DA9122_VARIANT_VRC 0x2
#define DA9217_VARIANT_VRC 0x7
+#define DA9130_VARIANT_VRC 0x0
+#define DA9131_VARIANT_VRC 0x1
+#define DA9132_VARIANT_VRC 0x2
/* DA9121_REG_OTP_CUSTOMER_ID */
--
2.25.1