Bug#911443: raspi3-firmware | Add board-specific firmware files for RPi 3B+ WiFi (!1)

[Stefan Wahren <stefan.wahren@i2se.com>]

Hi Matthias,

> Matthias Luescher <lueschem@gmail.com> hat am 1. Dezember 2018 um 22:38 geschrieben:
> 
> 
> Hi Stefan
> 
> > i want to play safe. Could you please check the Rev of your 3 B board?
> > You can find it on the upside of the PCB below the GPIO pin header (e.g.
> i have Rev 1.2).
> 
> Mine is also a "Raspberry Pi 3 Model B V1.2".
> 
> > Could you please provide a complete dmesg in case wlan0 is absent?
> 
> Here is the dmesg without wlan0:
> https://drive.google.com/open?id=1O-aYZreN_7ziHiVsxMc-zNoMAwKLB-UV
> 
> And here is one with wlan0:
> https://drive.google.com/open?id=1rD2BcEbxjxrpyrXqRglkyS3t1VkCXJ6l

very strange. Only in the case CONFIG_MMC_SDHCI_IPROC=m the power sequence seems to be active:

[    2.244705] sdhci-iproc 3f300000.sdhci: allocated mmc-pwrseq

So after fixing the polarity of the wifi-reset everything works as expected.

- reset-gpios = <&expgpio 1 GPIO_ACTIVE_HIGH>;
+ reset-gpios = <&expgpio 1 GPIO_ACTIVE_LOW>;

I think this should be acceptable as a stable fix for 4.19 LTS.

Stefan

> 
> > Could you please change your config to:
> > CONFIG_MMC_SDHCI_IPROC=y
> 
> This change does indeed make wlan0 appear! Unfortunately this is probably
> not a viable solution for the (generic) arm64 Debian kernel.
> 
> Many thanks already for your great support!
> 
> Best regards
> Matthias