diff options
Diffstat (limited to 'drivers/hwmon/pmbus/ltc2978.c')
| -rw-r--r-- | drivers/hwmon/pmbus/ltc2978.c | 50 |
1 files changed, 44 insertions, 6 deletions
diff --git a/drivers/hwmon/pmbus/ltc2978.c b/drivers/hwmon/pmbus/ltc2978.c index 7e10fbf8e133..28e1e735b5c2 100644 --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -25,13 +25,13 @@ #include <linux/regulator/driver.h> #include "pmbus.h" -enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 }; +enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3882, ltc3883, ltm4676 }; /* Common for all chips */ #define LTC2978_MFR_VOUT_PEAK 0xdd #define LTC2978_MFR_VIN_PEAK 0xde #define LTC2978_MFR_TEMPERATURE_PEAK 0xdf -#define LTC2978_MFR_SPECIAL_ID 0xe7 +#define LTC2978_MFR_SPECIAL_ID 0xe7 /* Not on LTC3882 */ /* LTC2974, LCT2977, and LTC2978 */ #define LTC2978_MFR_VOUT_MIN 0xfb @@ -42,7 +42,7 @@ enum chips { ltc2974, ltc2977, ltc2978, ltc3880, ltc3883, ltm4676 }; #define LTC2974_MFR_IOUT_PEAK 0xd7 #define LTC2974_MFR_IOUT_MIN 0xd8 -/* LTC3880, LTC3883, and LTM4676 */ +/* LTC3880, LTC3882, LTC3883, and LTM4676 */ #define LTC3880_MFR_IOUT_PEAK 0xd7 #define LTC3880_MFR_CLEAR_PEAKS 0xe3 #define LTC3880_MFR_TEMPERATURE2_PEAK 0xf4 @@ -313,7 +313,7 @@ static int ltc2978_clear_peaks(struct i2c_client *client, int page, { int ret; - if (id == ltc3880 || id == ltc3883 || id == ltm4676) + if (id == ltc3880 || id == ltc3882 || id == ltc3883 || id == ltm4676) ret = pmbus_write_byte(client, 0, LTC3880_MFR_CLEAR_PEAKS); else ret = pmbus_write_byte(client, page, PMBUS_CLEAR_FAULTS); @@ -369,6 +369,7 @@ static const struct i2c_device_id ltc2978_id[] = { {"ltc2977", ltc2977}, {"ltc2978", ltc2978}, {"ltc3880", ltc3880}, + {"ltc3882", ltc3882}, {"ltc3883", ltc3883}, {"ltm4676", ltm4676}, {} @@ -393,8 +394,30 @@ 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 < 0) { + const struct i2c_device_id *id; + u8 buf[I2C_SMBUS_BLOCK_MAX]; + int ret; + + if (!i2c_check_functionality(client->adapter, + I2C_FUNC_SMBUS_READ_BLOCK_DATA)) + return -ENODEV; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_ID, buf); + if (ret < 0) + return ret; + if (ret < 3 || strncmp(buf, "LTC", 3)) + return -ENODEV; + + ret = i2c_smbus_read_block_data(client, PMBUS_MFR_MODEL, buf); + if (ret < 0) + return ret; + for (id = <c2978_id[0]; strlen(id->name); id++) { + if (!strncasecmp(id->name, buf, strlen(id->name))) + return (int)id->driver_data; + } + return -ENODEV; + } if (chip_id == LTC2974_ID_REV1 || chip_id == LTC2974_ID_REV2) return ltc2974; @@ -498,6 +521,20 @@ static int ltc2978_probe(struct i2c_client *client, | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; break; + case ltc3882: + info->read_word_data = ltc3880_read_word_data; + info->pages = LTC3880_NUM_PAGES; + info->func[0] = PMBUS_HAVE_VIN + | PMBUS_HAVE_STATUS_INPUT + | PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT + | PMBUS_HAVE_POUT | PMBUS_HAVE_TEMP + | PMBUS_HAVE_TEMP2 | PMBUS_HAVE_STATUS_TEMP; + info->func[1] = PMBUS_HAVE_VOUT | PMBUS_HAVE_STATUS_VOUT + | PMBUS_HAVE_IOUT | PMBUS_HAVE_STATUS_IOUT + | PMBUS_HAVE_POUT + | PMBUS_HAVE_TEMP | PMBUS_HAVE_STATUS_TEMP; + break; case ltc3883: info->read_word_data = ltc3883_read_word_data; info->pages = LTC3883_NUM_PAGES; @@ -530,6 +567,7 @@ static const struct of_device_id ltc2978_of_match[] = { { .compatible = "lltc,ltc2977" }, { .compatible = "lltc,ltc2978" }, { .compatible = "lltc,ltc3880" }, + { .compatible = "lltc,ltc3882" }, { .compatible = "lltc,ltc3883" }, { .compatible = "lltc,ltm4676" }, { } |