linux-kernel - Re: [PATCH 3/9] dt-bindings: rtc: lpc32xx-rtc: move to trivial-rtc

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Date: Tue, 9 Apr 2024 10:52:54 +0200
From: Javier Carrasco <javier.carrasco.cruz@...il.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Alexandre Belloni <alexandre.belloni@...tlin.com>,
 Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>, Jiaxun Yang <jiaxun.yang@...goat.com>,
 Vladimir Zapolskiy <vz@...ia.com>, Joel Stanley <joel@....id.au>,
 Andrew Jeffery <andrew@...econstruct.com.au>,
 Maxime Coquelin <mcoquelin.stm32@...il.com>,
 Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc: linux-rtc@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 linux-aspeed@...ts.ozlabs.org, linux-stm32@...md-mailman.stormreply.com
Subject: Re: [PATCH 3/9] dt-bindings: rtc: lpc32xx-rtc: move to trivial-rtc

On 4/9/24 09:34, Krzysztof Kozlowski wrote:
> On 08/04/2024 17:53, Javier Carrasco wrote:
>> This RTC requires a compatible, a reg and a single interrupt,
>> which makes it suitable for a direct conversion into trivial-rtc.
>>
>> Signed-off-by: Javier Carrasco <javier.carrasco.cruz@...il.com>
>> ---
>>  Documentation/devicetree/bindings/rtc/lpc32xx-rtc.txt  | 15 ---------------
>>  Documentation/devicetree/bindings/rtc/trivial-rtc.yaml |  2 ++
>>  2 files changed, 2 insertions(+), 15 deletions(-)
> 
> This one no... and if you tested DTS you would see errors, although you
> need to test specific lpc config, not multi_v7.
> 
> It does not look like you tested the DTS against bindings. Please run
> `make dtbs_check W=1` (see
> Documentation/devicetree/bindings/writing-schema.rst or
> https://www.linaro.org/blog/tips-and-tricks-for-validating-devicetree-sources-with-the-devicetree-schema/
> for instructions).
> 
> Anyway, you *must* check all DTS before moving anything to trivial.
> 
> Does it mean all other bindings were not checked against DTS at all?
> 
> Best regards,
> Krzysztof
> 
Hi,

I did check the conversion against nxp/lpc/lpc3250-phy3250.dts, which
throws a message about the 'clocks' property.

That property is not documented in the original binding, and even though
it could be missing, I could not find any function to get a clock (i.e.
any form of clk_get()) in rtc-lpc32xx.c, which is the only file where
the compatible can be found.

Is therefore the property not useless in the dts? My apologies if I am
missing something here.

Thanks and best regards,
Javier Carrasco