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hwmon fixes for v6.11-rc8/v6.11

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- Fix clearing status register bits for chips supporting older
   PMBus versions
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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
This commit is contained in:
Linus Torvalds 2024-09-12 14:27:47 -07:00
commit fdf042df04
2 changed files with 20 additions and 3 deletions
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6
drivers/hwmon/pmbus/pmbus.h
View File

@ -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 */

17
drivers/hwmon/pmbus/pmbus_core.c
View File

@ -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