linux-kernel - Re: [PATCH RFC 2/2] ARM: dts: imx: add devicetree for Tolino Shine 2 HD

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Message-ID: <20200817075918.4e53e6b8@aktux>
Date:   Mon, 17 Aug 2020 07:59:18 +0200
From:   Andreas Kemnade <andreas@...nade.info>
To:     Jonathan Neuschäfer <j.neuschaefer@....net>
Cc:     robh+dt@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        Anson.Huang@....com, marcel.ziswiler@...adex.com,
        sebastien.szymanski@...adeus.com, rjones@...eworks.com,
        leoyang.li@....com, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        letux-kernel@...nphoenux.org
Subject: Re: [PATCH RFC 2/2] ARM: dts: imx: add devicetree for Tolino Shine
 2 HD

Hi,

On Sun, 16 Aug 2020 17:57:51 +0200
Jonathan Neuschäfer <j.neuschaefer@....net> wrote:

> On Sun, Aug 16, 2020 at 04:50:58PM +0200, Andreas Kemnade wrote:
> > Hi,
> > 
> > Seems that we have different hardware, so the first question is
> > first the most interesting thing: how much does the hw actually differ,
> > especially do they require different device trees?
> > 
> > Can you provide me a photo of your hardware?
> > Or is it a Shine 3?  
> 
> It is a Shine 2HD
> 
> > 
> > Mine is at https://misc.andi.de1.cc/tolino2.jpg  
> 
> Mine:
> 
> https://raw.githubusercontent.com/wiki/neuschaefer/linux/Tolino-Shine2HD.jpg
> 
> 
> It appears to be the next PCB revision (+4A3 instead of +4A2), but I
> think the PCB layout looks the same. The Realtek-based Wifi module is
> exactly where the CyberTan WC121 was.
> 

From other sources I also think these revisions are same besides wifi.

So the only thing warranting separate dtbs might be the OOB IRQ thing.
In the Tolino sources there is the function dhd_customer_oob_irq_map in
the bcmdhd driver, and it gets its number from this:
drivers/net/wireless/bcmdhd/Makefile:	-DCUSTOMER_HW2 -DCUSTOM_OOB_GPIO_NUM=127 -DOOB_INTR_ONLY -DHW_OOB

The brcmfmac driver is upstream and has devicetree support, but the
rtl8189fs is not. For the Clara I am using this one:
https://github.com/jwrdegoede/rtl8189ES_linux.git (branch 8189fs)
It has no devicetree support, so things cannot be defined anyway.

On one hand the hardware should be described in the devicetree as good
as possible but on the other hand the OOB IRQ is not mandatory.

Regards,
Andreas