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hwmon: (pmbus) Enable PEC if the controller supports it

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PMBus controllers optionally support PEC. Configure the driver
to use it if available to improve operational security.

Suggested-by: Michael Jones <mike@proclivis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck 2015-08-17 16:26:21 -07:00
parent 2c052d4280
commit d830e27dac
1 changed files with 5 additions and 0 deletions
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5
drivers/hwmon/pmbus/pmbus_core.c
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@ -1751,6 +1751,11 @@ static int pmbus_init_common(struct i2c_client *client, struct pmbus_data *data,
}
}
/* Enable PEC if the controller supports it */
ret = i2c_smbus_read_byte_data(client, PMBUS_CAPABILITY);
if (ret >= 0 && (ret & PB_CAPABILITY_ERROR_CHECK))
client->flags |= I2C_CLIENT_PEC;
pmbus_clear_faults(client);
if (info->identify) {