linux-kernel - Re: [PATCH 3/6] ARM: dts: broadcom: Fix SP804 node

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Date:   Wed, 26 Aug 2020 19:53:42 +0100
From:   André Przywara <andre.przywara@....com>
To:     Florian Fainelli <f.fainelli@...il.com>,
        Rob Herring <robh+dt@...nel.org>, devicetree@...r.kernel.org
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Daniel Lezcano <daniel.lezcano@...aro.org>,
        Haojian Zhuang <haojian.zhuang@...aro.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Ray Jui <rjui@...adcom.com>,
        Scott Branden <sbranden@...adcom.com>,
        bcm-kernel-feedback-list@...adcom.com
Subject: Re: [PATCH 3/6] ARM: dts: broadcom: Fix SP804 node

On 26/08/2020 19:42, Florian Fainelli wrote:

Hi,

> On 8/26/20 11:38 AM, Andre Przywara wrote:
>> The DT binding for SP804 requires to have an "arm,primecell" compatible
>> string.
>> Add this string so that the Linux primecell bus driver picks the device
>> up and activates the clock.
>>
>> Signed-off-by: Andre Przywara <andre.przywara@....com>
> 
> The commit subject should be:
> 
> ARM: dts: NSP: Fix SP804 compatible node
> 
> and we should probably have a Fixes tag that is:
> 
> Fixes: a0efb0d28b77 ("ARM: dts: NSP: Add SP804 Support to DT")
> 
> Could you please re-submit with those things corrected? Thanks

Sure, will include that in a v2.

Out of curiosity, do you have the hardware and can check the impact that
has?
Not sure we actually create the device without the primecell compatible?
Or is the sp804 an exception here, compared to the other AMBA devices
(SP805, PL011)?

Cheers,
Andre

>> ---
>>  arch/arm/boot/dts/bcm-nsp.dtsi | 2 +-
>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>
>> diff --git a/arch/arm/boot/dts/bcm-nsp.dtsi b/arch/arm/boot/dts/bcm-nsp.dtsi
>> index 0346ea621f0f..1333ef8be0a2 100644
>> --- a/arch/arm/boot/dts/bcm-nsp.dtsi
>> +++ b/arch/arm/boot/dts/bcm-nsp.dtsi
>> @@ -368,7 +368,7 @@
>>  		};
>>  
>>  		ccbtimer0: timer@...00 {
>> -			compatible = "arm,sp804";
>> +			compatible = "arm,sp804", "arm,primecell";
>>  			reg = <0x34000 0x1000>;
>>  			interrupts = <GIC_SPI 90 IRQ_TYPE_LEVEL_HIGH>,
>>  				     <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
>>
> 
>