Re: [PATCH v8 2/3] dt-bindings: arm: cpus: Document 'mediatek,freq-domain' property

From: Sudeep Holla <sudeep.holla@arm.com>
To: Lukasz Luba <lukasz.luba@arm.com>
Cc: Rob Herring <robh@kernel.org>,
	Hector Yuan <hector.yuan@mediatek.com>,
	linux-mediatek@lists.infradead.org,
	linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org,
	"Rafael J. Wysocki" <rjw@rjwysocki.net>,
	Viresh Kumar <viresh.kumar@linaro.org>,
	Maxime Ripard <mripard@kernel.org>,
	Santosh Shilimkar <ssantosh@kernel.org>,
	Amit Kucheria <amit.kucheria@linaro.org>,
	Stephen Boyd <sboyd@kernel.org>,
	Ulf Hansson <ulf.hansson@linaro.org>,
	Dave Gerlach <d-gerlach@ti.com>,
	Florian Fainelli <f.fainelli@gmail.com>,
	Robin Murphy <robin.murphy@arm.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	devicetree@vger.kernel.org, linux-kernel@vger.kernel.org,
	wsd_upstream@mediatek.com
Subject: Re: [PATCH v8 2/3] dt-bindings: arm: cpus: Document 'mediatek,freq-domain' property
Date: Thu, 19 Nov 2020 17:13:22 +0000	[thread overview]
Message-ID: <20201119171322.2gxrv5h7sqwllgsv@bogus> (raw)
In-Reply-To: <65a4e167-9d2c-7fcb-5373-33af5e002333@arm.com>

On Thu, Nov 19, 2020 at 03:23:20PM +0000, Lukasz Luba wrote:
> 
> 
> On 10/28/20 3:08 PM, Rob Herring wrote:
> > On Mon, Oct 26, 2020 at 04:19:08PM +0800, Hector Yuan wrote:
> > > From: "Hector.Yuan" <hector.yuan@mediatek.com>
> > > 
> > > Add devicetree documentation for 'mediatek,freq-domain' property specific
> > > to Mediatek CPUs. This property is used to reference the CPUFREQ node
> > > along with the domain id.
> > > 
> > > Signed-off-by: Hector.Yuan <hector.yuan@mediatek.com>
> > > ---
> > >   Documentation/devicetree/bindings/arm/cpus.yaml |    6 ++++++
> > >   1 file changed, 6 insertions(+)
> > > 
> > > diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml
> > > index 1222bf1..e995b26 100644
> > > --- a/Documentation/devicetree/bindings/arm/cpus.yaml
> > > +++ b/Documentation/devicetree/bindings/arm/cpus.yaml
> > > @@ -255,6 +255,12 @@ properties:
> > >         where voltage is in V, frequency is in MHz.
> > > +  mediatek,freq-domain:
> > > +    $ref: '/schemas/types.yaml#/definitions/phandle-array'
> > > +    description:
> > > +      CPUs supporting freq-domain must set their "mediatek,freq-domain" property
> > > +      with phandle to a cpufreq_hw node followed by the domain id.
> > 
> > This needs to be a common binding shared with SCMI domains.
> 
> Would it be accurate to create a new binding file:
> Documentation/devicetree/bindings/cpufreq/cpufreq-mediatek-hw.txt
> ?
>

Nope, Rob already asked to unify all such bindings and generalise it.
Here is my attempt[1] and this must just use it or help to enhance that
in order to make use of that binding.

-- 
Regards,
Sudeep

[1] https://lore.kernel.org/lkml/20201116181356.804590-1-sudeep.holla@arm.com