diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2024-09-12 14:27:47 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2024-09-12 14:27:47 -0700 |
| commit | fdf042df04634248b65dc88dc4913026a9d1776f (patch) | |
| tree | 3d6891eb1d4a8b30d2b06d5301541356fde9d2f1 /drivers | |
| parent | 5da028864fde4856398f9dfb922aa0545dbad271 (diff) | |
| parent | 20471071f198c8626dbe3951ac9834055b387844 (diff) | |
Merge tag 'hwmon-for-v6.11-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging
Pull hwmon fix from Guenter Roeck:
- Fix clearing status register bits for chips supporting older
PMBus versions
* tag 'hwmon-for-v6.11-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging:
hwmon: (pmbus) Conditionally clear individual status bits for pmbus rev >= 1.2
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus.h | 6 | ||||
| -rw-r--r-- | drivers/hwmon/pmbus/pmbus_core.c | 17 |
2 files changed, 20 insertions, 3 deletions
diff --git a/drivers/hwmon/pmbus/pmbus.h b/drivers/hwmon/pmbus/pmbus.h index fb442fae7b3e..0bea603994e7 100644 --- a/drivers/hwmon/pmbus/pmbus.h +++ b/drivers/hwmon/pmbus/pmbus.h @@ -418,6 +418,12 @@ enum pmbus_sensor_classes { enum pmbus_data_format { linear = 0, ieee754, direct, vid }; enum vrm_version { vr11 = 0, vr12, vr13, imvp9, amd625mv }; +/* PMBus revision identifiers */ +#define PMBUS_REV_10 0x00 /* PMBus revision 1.0 */ +#define PMBUS_REV_11 0x11 /* PMBus revision 1.1 */ +#define PMBUS_REV_12 0x22 /* PMBus revision 1.2 */ +#define PMBUS_REV_13 0x33 /* PMBus revision 1.3 */ + struct pmbus_driver_info { int pages; /* Total number of pages */ u8 phases[PMBUS_PAGES]; /* Number of phases per page */ diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index cb4c65a7f288..e592446b2665 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -85,6 +85,8 @@ struct pmbus_data { u32 flags; /* from platform data */ + u8 revision; /* The PMBus revision the device is compliant with */ + int exponent[PMBUS_PAGES]; /* linear mode: exponent for output voltages */ @@ -1095,9 +1097,14 @@ static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b, regval = status & mask; if (regval) { - ret = _pmbus_write_byte_data(client, page, reg, regval); - if (ret) - goto unlock; + if (data->revision >= PMBUS_REV_12) { + ret = _pmbus_write_byte_data(client, page, reg, regval); + if (ret) + goto unlock; + } else { + pmbus_clear_fault_page(client, page); + } + } if (s1 && s2) { s64 v1, v2; @@ -2640,6 +2647,10 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data, data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK; } + ret = i2c_smbus_read_byte_data(client, PMBUS_REVISION); + if (ret >= 0) + data->revision = ret; + if (data->info->pages) pmbus_clear_faults(client); else |