linux-kernel - Re: [PATCH 01/13] dt-bindings: clock: google,gs101: fix CMU

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Message-ID: <0d3ae184-5ded-42ab-97cf-13bbb296083a@linaro.org>
Date:   Thu, 14 Dec 2023 15:16:26 +0000
From:   Tudor Ambarus <tudor.ambarus@...aro.org>
To:     Sam Protsenko <semen.protsenko@...aro.org>
Cc:     peter.griffin@...aro.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
        sboyd@...nel.org, conor+dt@...nel.org, andi.shyti@...nel.org,
        alim.akhtar@...sung.com, gregkh@...uxfoundation.org,
        jirislaby@...nel.org, catalin.marinas@....com, will@...nel.org,
        s.nawrocki@...sung.com, tomasz.figa@...il.com,
        cw00.choi@...sung.com, arnd@...db.de, andre.draszik@...aro.org,
        saravanak@...gle.com, willmcvicker@...gle.com,
        linux-arm-kernel@...ts.infradead.org,
        linux-samsung-soc@...r.kernel.org, linux-clk@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-i2c@...r.kernel.org, linux-serial@...r.kernel.org
Subject: Re: [PATCH 01/13] dt-bindings: clock: google,gs101: fix CMU_TOP gate
 clock names



On 12/14/23 15:07, Sam Protsenko wrote:
> On Thu, Dec 14, 2023 at 4:52 AM Tudor Ambarus <tudor.ambarus@...aro.org> wrote:
>>
>> The gs101 clock names are derived from the clock register names under
>> some certain rules. In particular, for the gate clocks the following is
>> documented and expected in the gs101 clock driver:
>>
>>   Replace CLK_CON_GAT_CLKCMU      with CLK_GOUT_CMU and gout_cmu
>>   Replace CLK_CON_GAT_GATE_CLKCMU with CLK_GOUT_CMU and gout_cmu
>>
>>   For gates remove _UID _BLK _IPCLKPORT and _RSTNSYNC
>>
> 
> Doesn't it break existing gs101 device tree?

No, compilation went fine at this point. The TOP gates are not used in
the device tree at this point. And since the bindings patch was just
applied I think we should fix it, so that we avoid name clashes as
described below (I found a clash with a gate from PERIC0).

> 
>> The CMU TOP gate clock names missed to include the required "CMU"
>> differentiator which will cause name collisions with the gate clock names
>> of other clock units. Fix the TOP gate clock names and include "CMU" in
>> their name.
>>
>> Fixes: 0a910f160638 ("dt-bindings: clock: Add Google gs101 clock management unit bindings")
>> Signed-off-by: Tudor Ambarus <tudor.ambarus@...aro.org>
>> ---
> 
> (snip)

Thanks for the review!
ta