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Wed, 04 Sep 2019 23:19:55 -0700 (PDT) From: Pi-Hsun Shih To: Subject: [PATCH v19 1/4] dt-bindings: Add a binding for Mediatek SCP Date: Thu, 5 Sep 2019 14:19:34 +0800 Message-Id: <20190905061943.242729-2-pihsun@chromium.org> X-Mailer: git-send-email 2.23.0.187.g17f5b7556c-goog In-Reply-To: <20190905061943.242729-1-pihsun@chromium.org> References: <20190905061943.242729-1-pihsun@chromium.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190904_231956_706331_C86727D7 X-CRM114-Status: GOOD ( 15.46 ) X-Spam-Score: -0.2 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [2607:f8b0:4864:20:0:0:0:444 listed in] [list.dnswl.org] 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record -0.0 SPF_PASS SPF: sender matches SPF record -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.0 DKIMWL_WL_HIGH DKIMwl.org - Whitelisted High sender 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: 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-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org 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 v18, v17, v16, v15, v14, v13, v12, v11, v10, v9, v8, v7, 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"; + };