SDIO_CCCR_BRCM_CARDCTRL
reg_val = brcmf_sdiod_func0_rb(sdiodev, SDIO_CCCR_BRCM_CARDCTRL, &err);
brcmf_sdiod_func0_wb(sdiodev, SDIO_CCCR_BRCM_CARDCTRL, reg_val, &err);