mux_m_gpio
reg = sppctl_prep_moon_reg_and_offset(offset, ®_off, (master == mux_m_gpio));
if (g_f == mux_f_gpio && g_m == mux_m_gpio)
sppctl_first_master_set(&pctl->spp_gchip->chip, offset, mux_f_gpio, mux_m_gpio);