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Mon, 07 Sep 2020 23:48:14 -0700 (PDT) Received: from pi3 ([194.230.155.174]) by smtp.googlemail.com with ESMTPSA id j8sm16697525edp.58.2020.09.07.23.48.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2020 23:48:13 -0700 (PDT) Date: Tue, 8 Sep 2020 08:48:11 +0200 From: Krzysztof Kozlowski To: Jonathan Bakker Subject: Re: [PATCH 03/25] dt-bindings: iio: adc: exynos-adc: do not require syscon on S5Pv210 Message-ID: <20200908064811.GA24227@pi3> References: <20200907161141.31034-1-krzk@kernel.org> <20200907161141.31034-4-krzk@kernel.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200908_024817_787363_02BE194C X-CRM114-Status: GOOD ( 22.28 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Lars-Peter Clausen , linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Rob Herring , linux-samsung-soc@vger.kernel.org, Kukjin Kim , linux-arm-kernel@lists.infradead.org, Peter Meerwald-Stadler , Jonathan Cameron , =?utf-8?B?UGF3ZcWC?= Chmiel Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Sep 07, 2020 at 02:49:49PM -0700, Jonathan Bakker wrote: > Looking at this again, it appears that there is actually control for > it at offset 0x6818 of pmu_syscon (0xe0108000) [1]. However, it defaults to > enabled so it's not required for proper use of the block. Whether it should > be present in the schema/DTS is up to you. Indeed the driver could turn off the ADC phy via syscon however bindings (before YAML conversion) explicitly were saying that it is not needed. I am not going to add it as I am not able to test the change and also adding such requirement would be a break of ABI (described by first TXT bindings). Best regards, Krzysztof > > Thanks, > Jonathan > > [1] https://android.googlesource.com/kernel/samsung/+/refs/heads/android-samsung-3.0-jb-mr0/arch/arm/mach-s5pv210/include/mach/regs-clock.h#325 > > On 2020-09-07 9:11 a.m., Krzysztof Kozlowski wrote: > > The ADC in S5Pv210 does not have ADC phy registers in separate block for > > which syscon would be needed. Remove this requirement to fix dtbs_check > > warnings like: > > > > arch/arm/boot/dts/s5pv210-fascinate4g.dt.yaml: adc@e1700000: 'samsung,syscon-phandle' is a required property > > > > Signed-off-by: Krzysztof Kozlowski > > --- > > .../devicetree/bindings/iio/adc/samsung,exynos-adc.yaml | 1 - > > 1 file changed, 1 deletion(-) > > > > diff --git a/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml b/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml > > index 89b4f9c252a6..75174af72288 100644 > > --- a/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml > > +++ b/Documentation/devicetree/bindings/iio/adc/samsung,exynos-adc.yaml > > @@ -81,7 +81,6 @@ allOf: > > - samsung,exynos-adc-v2 > > - samsung,exynos3250-adc > > - samsung,exynos4212-adc > > - - samsung,s5pv210-adc > > then: > > required: > > - samsung,syscon-phandle > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel