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path: root/drivers/hwmon/pmbus
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Diffstat (limited to 'drivers/hwmon/pmbus')
-rw-r--r--drivers/hwmon/pmbus/ltc2978.c48
1 files changed, 29 insertions, 19 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c
index 33081d1d1c5a..7e10fbf8e133 100644
--- a/drivers/hwmon/pmbus/ltc2978.c
+++ b/drivers/hwmon/pmbus/ltc2978.c
@@ -388,10 +388,36 @@ static const struct regulator_desc ltc2978_reg_desc[] = {
};
#endif /* CONFIG_SENSORS_LTC2978_REGULATOR */
+static int ltc2978_get_id(struct i2c_client *client)
+{
+ int chip_id;
+
+ chip_id = i2c_smbus_read_word_data(client, LTC2978_MFR_SPECIAL_ID);
+ if (chip_id < 0)
+ return chip_id;
+
+ if (chip_id == LTC2974_ID_REV1 || chip_id == LTC2974_ID_REV2)
+ return ltc2974;
+ else if (chip_id == LTC2977_ID)
+ return ltc2977;
+ else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2 ||
+ chip_id == LTC2978A_ID)
+ return ltc2978;
+ else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID)
+ return ltc3880;
+ else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID)
+ return ltc3883;
+ else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID)
+ return ltm4676;
+
+ dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
+ return -ENODEV;
+}
+
static int ltc2978_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
- int chip_id, i;
+ int i, chip_id;
struct ltc2978_data *data;
struct pmbus_driver_info *info;
@@ -404,27 +430,11 @@ static int ltc2978_probe(struct i2c_client *client,
if (!data)
return -ENOMEM;
- chip_id = i2c_smbus_read_word_data(client, LTC2978_MFR_SPECIAL_ID);
+ chip_id = ltc2978_get_id(client);
if (chip_id < 0)
return chip_id;
- if (chip_id == LTC2974_ID_REV1 || chip_id == LTC2974_ID_REV2) {
- data->id = ltc2974;
- } else if (chip_id == LTC2977_ID) {
- data->id = ltc2977;
- } else if (chip_id == LTC2978_ID_REV1 || chip_id == LTC2978_ID_REV2 ||
- chip_id == LTC2978A_ID) {
- data->id = ltc2978;
- } else if ((chip_id & LTC3880_ID_MASK) == LTC3880_ID) {
- data->id = ltc3880;
- } else if ((chip_id & LTC3883_ID_MASK) == LTC3883_ID) {
- data->id = ltc3883;
- } else if ((chip_id & LTM4676_ID_MASK) == LTM4676_ID) {
- data->id = ltm4676;
- } else {
- dev_err(&client->dev, "Unsupported chip ID 0x%x\n", chip_id);
- return -ENODEV;
- }
+ data->id = chip_id;
if (data->id != id->driver_data)
dev_warn(&client->dev,
"Device mismatch: Configured %s, detected %s\n",