Hi, I am struggling trying to get 802.11ac working on Marvell (now NXP) W8897 (verext = w8897o-B0, RF87XX, FP68, 15.68.19.p17) using the mwifiex driver. This is supposed to be a 2x2 dual band 801.11ac chip. This is an ARMv7 embedded device where the wifi module in accessed via MMC. I am using kernel 5.4.24 with 15.68.19.p17 firmware and iw version 5.4. #uname -a Linux 5.4.24 #3 PREEMPT Mon Mar 9 19:59:02 CET 2020 armv7l GNU/Linux #dmesg | grep -i mmc [ 1.060141] mmc0: SDHCI controller on f7ab0000.sdhci [f7ab0000.sdhci] using ADMA [ 1.189514] mmc0: new ultra high speed SDR104 SDIO card at address 0001 [ 300.280194] mwifiex_sdio mmc0:0001:1: info: FW download over, size 701072 bytes [ 301.000230] mwifiex_sdio mmc0:0001:1: WLAN FW is active [ 301.062787] mwifiex_sdio mmc0:0001:1: Unknown api_id: 4 [ 301.117673] mwifiex_sdio mmc0:0001:1: info: MWIFIEX VERSION: mwifiex 1.0 (15.68.19.p17) The regulatory domain is set to US and the kernel module is loaded with the reg_alpha2=US hint. #iw reg get global country US: DFS-FCC (2402 - 2472 @ 40), (N/A, 30), (N/A) (5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW (5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW (5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS (5735 - 5835 @ 80), (N/A, 30), (N/A) (57240 - 71000 @ 2160), (N/A, 40), (N/A) phy#0 country US: DFS-FCC (2402 - 2472 @ 40), (N/A, 30), (N/A) (5170 - 5250 @ 80), (N/A, 23), (N/A), AUTO-BW (5250 - 5330 @ 80), (N/A, 23), (0 ms), DFS, AUTO-BW (5490 - 5730 @ 160), (N/A, 23), (0 ms), DFS (5735 - 5835 @ 80), (N/A, 30), (N/A) (57240 - 71000 @ 2160), (N/A, 40), (N/A) Despite that, iw list only detects the 2.4GHz band https://pastebin.com/5jEQmTTt Is this configuration not supported? I feel like I am missing something obvious. Any help appreciated, I've been banging my head against it for a while. Best regards, Jan