linux-kernel - Re: [PATCH] ARM: dts: omap3-gta04: Drop superfluous omap36xx compatible

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Date:   Wed, 4 Oct 2023 13:39:03 +0200
From:   "H. Nikolaus Schaller" <hns@...delico.com>
To:     Andreas Kemnade <andreas@...nade.info>
Cc:     bcousson@...libre.com, Tony Lindgren <tony@...mide.com>,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org, linux-omap@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ARM: dts: omap3-gta04: Drop superfluous omap36xx
 compatible



> Am 04.10.2023 um 13:03 schrieb Andreas Kemnade <andreas@...nade.info>:
> 
> On Wed, 4 Oct 2023 12:50:16 +0200
> "H. Nikolaus Schaller" <hns@...delico.com> wrote:
> 
>> Hi Andreas,
>> 
>>> Am 04.10.2023 um 08:53 schrieb Andreas Kemnade <andreas@...nade.info>:
>>> 
>>> Drop omap36xx compatible as done in other omap3630 devices.
>>> This has apparently fallen through the lattice.
>>> 
>>> Signed-off-by: Andreas Kemnade <andreas@...nade.info>
>>> ---
>>> arch/arm/boot/dts/ti/omap/omap3-gta04.dtsi | 2 +-
>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>> 
>>> diff --git a/arch/arm/boot/dts/ti/omap/omap3-gta04.dtsi b/arch/arm/boot/dts/ti/omap/omap3-gta04.dtsi
>>> index b6b27e93857f..3661340009e7 100644
>>> --- a/arch/arm/boot/dts/ti/omap/omap3-gta04.dtsi
>>> +++ b/arch/arm/boot/dts/ti/omap/omap3-gta04.dtsi
>>> @@ -11,7 +11,7 @@
>>> 
>>> / {
>>> 	model = "OMAP3 GTA04";
>>> -	compatible = "goldelico,gta04", "ti,omap3630", "ti,omap36xx", "ti,omap3";  
>> 
>> there seem to be some more references to ti,omap36xx:
>> 
>> arch/arm/boot/dts/ti/omap/omap3-lilly-a83x.dtsi:	compatible = "incostartec,omap3-lilly-a83x", "ti,omap3630", "ti,omap36xx", "ti,omap3";
> 
> apperently all the dtsi are fallen through the lattice when handling the dts.
> 
> 
>> arch/arm/mach-omap2/board-generic.c:	"ti,omap36xx",
>> drivers/clk/ti/dpll.c:	     of_machine_is_compatible("ti,omap36xx")) &&
>> drivers/cpufreq/ti-cpufreq.c:	{ .compatible = "ti,omap36xx", .data = &omap36xx_soc_data, },
>> 
>> So are you sure that we can remove it without replacement or code fixes in dpll and cpufreq (board-generic is probably no issue)?
>> 
> see discussion of:
> 
> commit e341f338180c84cd98af3016cf5bcfde45a041fb
> Author: Andrew Davis <afd@...com>
> Date:   Thu Feb 16 09:33:38 2023 -0600
> 
>    ARM: dts: omap: Drop ti,omap36xx compatible

Ah, I wasn't aware of this.

> 
> all the places also basically check for omap36xx || omap3630.


Yes, I have checked but drivers/cpufreq/ti-cpufreq.c seems to be an
exception (unless I am missing some other patch).

Generally it could be good to remove the double checks
for omap36xx || omap3630 in code? Is this planned as well?

BR,
Nikolaus