my Cherry trail ezpad 6 tablet has a brcmfmac43430a0-sdio wifi, wifi
speed only 30Mbps under 40mhz.
my Bay trail tablet has a rtl8723bs sdio wifi, wifi speed can 70Mbps
under 40mhz.
so i can guess the brcmfmac43430a0-sdio wifi not support 40mhz?
linux kernel 5.6 rc6
[13726.460088] usbcore: deregistering interface driver brcmfmac
[13730.674252] mmc1: queuing unknown CIS tuple 0x80 (2 bytes)
[13730.677765] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[13730.682114] mmc1: queuing unknown CIS tuple 0x80 (3 bytes)
[13730.687617] mmc1: queuing unknown CIS tuple 0x80 (7 bytes)
[13730.916588] brcmfmac: brcmf_fw_alloc_request: using
brcm/brcmfmac43430a0-sdio for chip BCM43430/0
[13730.916906] usbcore: registered new interface driver brcmfmac
[13731.024690] brcmfmac: brcmf_fw_alloc_request: using
brcm/brcmfmac43430a0-sdio for chip BCM43430/0
[13731.024825] brcmfmac: brcmf_c_process_clm_blob: no clm_blob
available (err=-2), device may have limited channels available
[13731.026035] brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM43430/0
wl0: May 29 2017 00:03:43 version 7.13.53.9 (r664949) FWID 01-130000