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hwmon: (pmbus/core) allow drivers to override WRITE_PROTECT

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Use _pmbus_read_byte_data() rather than calling smbus directly to check
the write protection status. This give a chance to device implementing
write protection differently to report back on the actual write protection
status.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Message-ID: <20241105-tps25990-v4-2-0e312ac70b62@baylibre.com>
[groeck: Fix page parameter of _pmbus_read_byte_data()]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Jerome Brunet 2024-11-05 18:58:39 +01:00 committed by Guenter Roeck
parent 544177f20b
commit 7a750b3986
1 changed files with 1 additions and 3 deletions
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4
drivers/hwmon/pmbus/pmbus_core.c
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@ -2719,9 +2719,7 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
* limit registers need to be disabled.
*/
if (!(data->flags & PMBUS_NO_WRITE_PROTECT)) {
pmbus_wait(client);
ret = i2c_smbus_read_byte_data(client, PMBUS_WRITE_PROTECT);
pmbus_update_ts(client, false);
ret = _pmbus_read_byte_data(client, -1, PMBUS_WRITE_PROTECT);
if (ret > 0 && (ret & PB_WP_ANY))
data->flags |= PMBUS_WRITE_PROTECTED | PMBUS_SKIP_STATUS_CHECK;