W83793_REG_SF2_PWM
w83793_read_value(client, W83793_REG_SF2_PWM(i, j));
w83793_read_value(client, W83793_REG_SF2_PWM(index, nr)) & 0xc0;
w83793_write_value(client, W83793_REG_SF2_PWM(index, nr),