[solved] rpi3b+ aarch64 WLAN missing in 4.20 and > 4.19.11

[2c982m9]

Issue with 4.20.0-rc-7 or a packaging issue?

4.20.0-rc6-1-ARCH

$this->bbcode_second_pass_code('', '
Nov 28 00:20:26 alarm systemd[1]: Found device /dev/mmcblk0p1.
Nov 28 00:20:26 alarm kernel: brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
Nov 28 00:20:26 alarm kernel: usbcore: registered new interface driver brcmfmac
Nov 28 00:20:26 alarm kernel: brcmfmac: brcmf_fw_alloc_request: using brcm/brcmfmac43455-sdio for chip BCM4345/6
Nov 28 00:20:26 alarm kernel: brcmfmac: brcmf_c_preinit_dcmds: Firmware: BCM4345/6 wl0: Feb 27 2018 03:15:32 version 7.45.154 (r684107 CY) FWID 01-4fbe0b04
')

4.20.0-rc7-1-ARCH

$this->bbcode_second_pass_code('', '
Nov 28 00:20:26 alarm systemd[1]: Found device /dev/mmcblk0p1.
Nov 28 00:20:26 alarm kernel: brcmfmac: probe of mmc1:0001:1 failed with error -110
Nov 28 00:20:26 alarm kernel: brcmfmac: probe of mmc1:0001:2 failed with error -110
Nov 28 00:20:26 alarm kernel: brcmfmac: probe of mmc1:0001:3 failed with error -110
Nov 28 00:20:26 alarm kernel: usbcore: registered new interface driver brcmfmac
Nov 28 00:20:26 alarm kernel: btsdio: probe of mmc1:0001:3 failed with error -110
')

[edit: renamed thread to reflect issue is also now with 4.19 stable.]

[2c982m9]

Looks like right now the easiest fix might be to use:

$this->bbcode_second_pass_code('', 'CONFIG_MMC_SDHCI_IPROC=m')

given commit e25b6783c7b1 ARM: dts: bcm2837: Fix polarity of wifi reset GPIOs is now in 4.20.rc7 and 4.19.11.

$this->bbcode_second_pass_quote('', 'T')he commit b1b8f45b3130 ("ARM: dts: bcm2837: Add missing GPIOs of Expander") introduced a wifi power sequence. Unfortunately the polarity of the reset GPIOs were wrong and broke the wifi support on Raspberry Pi 3 B and later in 3 B+. This wasn't discovered before since the power sequence takes only effect in case the relevant MMC driver is compiled as a module.

[2c982m9]

linux-aarch64/files/0005-Revert-ARM-dts-bcm2837-Fix-polarity-of-wifi-reset-GP.patch

Reverting the commit b1b8f45b3130 with ^ results in a wlan0.

[2c982m9]

linux-aarch64/files/0005-mmc-sdhci-iproc-handle-mmc_of_parse-errors-during-pr.patch

And ^ works instead. Is that indeed the long term fix that should go upstream?

Thanks

[lategoodbye]

I pointed kmihelich to this upstream patch. It hasn't applied yet due the holidays.