Validate PWM connectivity only for additional PWM - "pwm1" is connected
on all systems, while "pwm2" - "pwm4" are optional. Validate
connectivity only for optional attributes by reading of related "pwm{n}"
registers - in case "pwm{n}" is not connected, register value is
supposed to be 0xff.
Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Link: https://lore.kernel.org/r/20210926053541.1806937-2-vadimp@nvidia.com
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
return -EINVAL;
}
- err = mlxreg_pwm_connect_verify(fan, data);
- if (err)
- return err;
+ /* Validate if more then one PWM is connected. */
+ if (pwm_num) {
+ err = mlxreg_pwm_connect_verify(fan, data);
+ if (err < 0)
+ return err;
+ else if (!err)
+ continue;
+ }
fan->pwm[pwm_num].reg = data->reg;
fan->pwm[pwm_num].connected = true;