linux-kernel - Re: [PATCH 6/9] arm64: dts: exynos: gs101: enable i2c bus 12 on gs101-oriole

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Date: Mon, 29 Jan 2024 10:34:30 -0600
From: Sam Protsenko <semen.protsenko@...aro.org>
To: André Draszik <andre.draszik@...aro.org>
Cc: peter.griffin@...aro.org, mturquette@...libre.com, sboyd@...nel.org, 
	robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org, 
	linux-kernel@...r.kernel.org, kernel-team@...roid.com, 
	tudor.ambarus@...aro.org, willmcvicker@...gle.com, alim.akhtar@...sung.com, 
	s.nawrocki@...sung.com, tomasz.figa@...il.com, cw00.choi@...sung.com, 
	linux-arm-kernel@...ts.infradead.org, linux-samsung-soc@...r.kernel.org, 
	linux-clk@...r.kernel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 6/9] arm64: dts: exynos: gs101: enable i2c bus 12 on gs101-oriole

On Mon, Jan 29, 2024 at 4:40 AM André Draszik <andre.draszik@...aro.org> wrote:
>
> Hi Sam,
>
> On Fri, 2024-01-26 at 20:58 -0600, Sam Protsenko wrote:
> > On Fri, Jan 26, 2024 at 6:19 PM André Draszik <andre.draszik@...aro.org> wrote:
> > >
> > > This bus has various USB-related devices attached to it.
> > >
> > > [...]
> > >
> > > +&hsi2c_12 {
> > > +       status = "okay";
> >
> > But there are no bus clients declared here? A bit of explanation about
> > how this bus is being currently used would be nice to have (in commit
> > message); e.g. maybe it's used in user space somehow, etc. Because
> > otherwise it doesn't have much sense to enable the bus with no users.
>
> As per the commit message, there are devices, but:
> * most or all don't have an upstream driver at this stage
> * it does make sense to enable the bus, as enabling it allows working on
>   the drivers for the devices that are attached to this bus
>

Then can you please add the corresponding TODO comment on top of the
code you added in this patch? And perhaps also describe which devices
you have on the bus in commit message.

> Cheers,
> Andre'
>