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[66.90.144.107]) by smtp.gmail.com with ESMTPSA id e9-20020a056820060900b003216277bfdasm13227604oow.19.2022.04.12.12.54.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 12 Apr 2022 12:54:28 -0700 (PDT) Received: (nullmailer pid 775571 invoked by uid 1000); Tue, 12 Apr 2022 19:54:27 -0000 Date: Tue, 12 Apr 2022 14:54:27 -0500 From: Rob Herring To: Drew Fustini Cc: Krzysztof Kozlowski , Dave Gerlach , Tony Lindgren , Nishanth Menon , Santosh Shilimkar , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v2 1/2] dt-bindings: wkup-m3-ipc: Add vtt toggle gpio pin property Message-ID: References: <20220409211215.2529387-1-dfustini@baylibre.com> <20220409211215.2529387-2-dfustini@baylibre.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20220409211215.2529387-2-dfustini@baylibre.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220412_125430_633336_F2B57B0D X-CRM114-Status: GOOD ( 21.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 Sat, Apr 09, 2022 at 02:12:14PM -0700, Drew Fustini wrote: > Document Wakeup M3 IPC property that indicates a GPIO pin is connected > to the enable pin on DDR VTT regulator and can be toggled during low > power mode transitions. > > Signed-off-by: Dave Gerlach > [dfustini: converted to YAML, removed unnecessary "ti,needs-vtt-toggle"] > Signed-off-by: Drew Fustini > --- > .../devicetree/bindings/soc/ti/wkup-m3-ipc.yaml | 13 +++++++++++++ > 1 file changed, 13 insertions(+) > > diff --git a/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml b/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml > index d855c01ce61c..7f4a75c5fcaa 100644 > --- a/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml > +++ b/Documentation/devicetree/bindings/soc/ti/wkup-m3-ipc.yaml > @@ -24,6 +24,14 @@ description: |+ > A wkup_m3_ipc device node is used to represent the IPC registers within an > SoC. > > + Support for VTT Toggle > + ================================== > + On some boards like the AM335x EVM-SK and the AM437x GP EVM, a GPIO pin is > + connected to the enable pin on the DDR VTT regulator. This allows the > + regulator to be disabled upon suspend and enabled upon resume. Please note > + that the GPIO pin must be part of the GPIO0 module as only this GPIO module > + is in the wakeup power domain. > + > properties: > compatible: > enum: > @@ -51,6 +59,10 @@ properties: > mbox_wkupm3 child node. > maxItems: 1 > > + ti,vtt-gpio-pin: > + $ref: /schemas/types.yaml#/definitions/uint32 > + description: GPIO pin connected to enable pin on VTT regulator Looking at the driver, can't you add 'maximum: 31' here? If so, I can add it when applying. Rob _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel