Hi, On a imx6sl-warp board with a brcm4330 I get the following results depending on the kernel version: - Kernel 4.4.15: place brcmfmac4330-sdio.bin and brcmfmac4330-sdio.txt in the rootfs and the kernel is able to read them correctly. wlan0 is present. All is fine. - Kernel 4.5.7: place brcmfmac4330-sdio.bin brcmfmac4330-sdio.txt in the rootfs and the kernel fails to load them: brcmfmac mmc1:0001:1: Direct firmware load for brcm/brcmfmac4330-sdio.bin failed with error -2 Then I build brcmfmac4330-sdio.bin brcmfmac4330-sdio.txt into the kernel and then firmware is detected and wlan0 appears. - Kernel 4.7: I can place the firmware and nvram file into the rootfs or built-i and the following error is seen: brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50 brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50 brcmfmac: brcmf_sdio_htclk: HT Avail timeout (1000000): clkctl 0x50 So wlan0 never appears here. Does anyone have any suggestions about these different behaviours? Thanks, Fabio Estevam -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html