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b=fliNtZtJuXboXlnGHcUSQeNnFrUSV2zK5IPgYftG7l1xUzoniLEWqFLpumiMkoTxux nbN00PWp8fliozLZ7UWBq7qzDA3HDxhQNiaPfmfwtcxhpSBtxY5z9hbrtWUqxfyyLRxC 0jP85Rmc1aYhOg0X4TqChfA6JjcjOzt7bQs8oN1qGDotljmdqzZCU/MQli/wjtVbeSxk Tqx4ubeHfHmJX6CHLx02tTt08nwvLZI+TJplxXtZ/T8g9dvCuCXPrDsNyX6LF5dRY1iv EeQ2JiY7gYUw1/2hrWb1Hnl5HlMVWPmlw1CxP7tkwxmhPYgPMdVLEAh+8l2p61SuYo+C waHw== X-Gm-Message-State: APjAAAU4VtVkwsYD7czxos0PzR5SZh8m2LYlbjTKxS1XB3/Ey2E7iouo mH25FXPRQojsatJ4ZQelto+2KQ== X-Google-Smtp-Source: APXvYqyP7GLs2iBEgAEnBvpKsM8ipQ7h2tK6i4K30swdkFxy2VhaZMOaRa6ufIxQWtoPOvyZW615NQ== X-Received: by 2002:a62:b40b:: with SMTP id h11mr24147278pfn.133.1553663701403; Tue, 26 Mar 2019 22:15:01 -0700 (PDT) Received: from pihsun-z840.tpe.corp.google.com ([2401:fa00:1:10:7889:7a43:f899:134c]) by smtp.googlemail.com with ESMTPSA id k72sm58622609pfb.122.2019.03.26.22.14.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 26 Mar 2019 22:15:00 -0700 (PDT) From: Peter Shih To: Subject: [PATCH v7 1/7] dt-bindings: Add a binding for Mediatek SCP Date: Wed, 27 Mar 2019 13:14:43 +0800 Message-Id: <20190327051450.16222-2-pihsun@chromium.org> X-Mailer: git-send-email 2.21.0.392.gf8f6787159e-goog In-Reply-To: <20190327051450.16222-1-pihsun@chromium.org> References: <20190327051450.16222-1-pihsun@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190326_221503_417289_73F6A7B4 X-CRM114-Status: GOOD ( 15.17 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ohad Ben-Cohen , Rob Herring , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , Erin Lo , "open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM" , open list , Bjorn Andersson , Rob Herring , "moderated list:ARM/Mediatek SoC support" , Pi-Hsun Shih , Matthias Brugger , Mark Rutland , "moderated list:ARM/Mediatek SoC support" Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP From: Erin Lo Add a DT binding documentation of SCP for the MT8183 SoC from Mediatek. Signed-off-by: Erin Lo Signed-off-by: Pi-Hsun Shih Reviewed-by: Rob Herring --- Changes from v6: - No change. Changes from v5: - Remove dependency on CONFIG_RPMSG_MTK_SCP. Changes from v4: - Add detail of more properties. - Document the usage of mtk,rpmsg-name in subnode from the new design. Changes from v3: - No change. Changes from v2: - No change. I realized that for this patch series, there's no need to add anything under the mt8183-scp node (neither the mt8183-rpmsg or the cros-ec-rpmsg) for them to work, since mt8183-rpmsg is added directly as a rproc_subdev by code, and cros-ec-rpmsg is dynamically created by SCP name service. Changes from v1: - No change. --- .../bindings/remoteproc/mtk,scp.txt | 36 +++++++++++++++++++ 1 file changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt new file mode 100644 index 000000000000..3ba668bab14b --- /dev/null +++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt @@ -0,0 +1,36 @@ +Mediatek SCP Bindings +---------------------------------------- + +This binding provides support for ARM Cortex M4 Co-processor found on some +Mediatek SoCs. + +Required properties: +- compatible Should be "mediatek,mt8183-scp" +- reg Should contain the address ranges for the two memory + regions, SRAM and CFG. +- reg-names Contains the corresponding names for the two memory + regions. These should be named "sram" & "cfg". +- clocks Clock for co-processor (See: ../clock/clock-bindings.txt) +- clock-names Contains the corresponding name for the clock. This + should be named "main". + +Subnodes +-------- + +Subnodes of the SCP represent rpmsg devices. The names of the devices are not +important. The properties of these nodes are defined by the individual bindings +for the rpmsg devices - but must contain the following property: + +- mtk,rpmsg-name Contains the name for the rpmsg device. Used to match + the subnode to rpmsg device announced by SCP. + +Example: + + scp: scp@10500000 { + compatible = "mediatek,mt8183-scp"; + reg = <0 0x10500000 0 0x80000>, + <0 0x105c0000 0 0x5000>; + reg-names = "sram", "cfg"; + clocks = <&infracfg CLK_INFRA_SCPSYS>; + clock-names = "main"; + };