Re: rpi0w wifi

[Patrick Welche <prlw1%cam.ac.uk@localhost>]

On Tue, Feb 18, 2020 at 11:14:30PM +0100, Harold Gutch wrote:
> On Fri, Feb 14, 2020 at 09:43:43AM +0100, Harold Gutch wrote:
> > On Thu, Feb 13, 2020 at 03:00:47PM +0000, Patrick Welche wrote:
> > > On Thu, Feb 13, 2020 at 01:48:20PM +0000, Luke Ross wrote:
> > > > Might be worth checking your dmesg to see if you are experiencing similar? I
> > > > think "sdmmc1: sdmmc_mem_enable failed with error 60" is key error.
> > > 
> > > I just opened PR kern/54959 hoping the SDMMC_DEBUG bits might help.
> > 
> > Just to confirm, I am seeing the same as you (CRC errors on sdhc0, no
> > bwfm) with both the 202002081050Z and the 202002130840Z build on an
> > RPi-0W.  I'll try to find some time over the weekend to find the
> > commit that broke it.
> 
> It's the .dtb.  A new set of .dts files was imported on January 3,
> reverting to bcm2835-rpi-zero-w.dtb from January 2 makes bwfm show up
> again.  With the attached patch applied I also see bwfm again.  In
> terms of the dts files as in the tree, it esems to me this should go after
> l. 114 in src/sys/external/gpl2/dts/dist/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
> but I haven't tested this.
> 
> 
>   Harold

> --- bcm2835-rpi-zero-w_old.dts	2020-02-18 00:56:09.212331000 +0100
> +++ bcm2835-rpi-zero-w.dts	2020-02-18 22:53:04.145250000 +0100
> @@ -528,16 +528,17 @@
>  		sdhci@7e300000 {
>  			compatible = "brcm,bcm2835-sdhci";
>  			reg = <0x7e300000 0x100>;
>  			interrupts = <0x2 0x1e>;
>  			clocks = <0x8 0x1c>;
>  			status = "okay";
>  			#address-cells = <0x1>;
>  			#size-cells = <0x0>;
> +			pinctrl-names = "default";
>  			pinctrl-0 = <0x12 0x13>;
>  			bus-width = <0x4>;
>  			mmc-pwrseq = <0x14>;
>  			non-removable;
>  			phandle = <0x4d>;
>  
>  			wifi@1 {
>  				reg = <0x1>;


My bcm2835-rpi-zero-w.dts (from -current) doesn't look like yours?

File: bcm2835-rpi-zero-w.dts    Status: Up-to-date

   Working revision:    1.1.1.4
   Repository revision: 1.1.1.4 /cvsroot/src/sys/external/gpl2/dts/dist/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts,v
   Commit Identifier:   SXhTdxQNn69bLfRB
   Sticky Tag:          (none)
   Sticky Date:         (none)
   Sticky Options:      (none)

e.g.
# grep bcm2835-sdhci /usr/src/sys/external/gpl2/dts/dist/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts
#

On the off chance I tried

https://raw.githubusercontent.com/raspberrypi/linux/rpi-4.19.y/arch/arm/boot/dts/bcm2835-rpi-zero-w.dts

to no avail, but it does have an extra pinctrl-names="default", in wifi_pwrseq.

How do our trees differ?


Cheers,

Patrick