From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Return-Path: From: Pi-Hsun Shih Subject: [PATCH v12 1/5] dt-bindings: Add a binding for Mediatek SCP Date: Tue, 2 Jul 2019 14:05:24 +0800 Message-Id: <20190702060546.222934-2-pihsun@chromium.org> In-Reply-To: <20190702060546.222934-1-pihsun@chromium.org> References: <20190702060546.222934-1-pihsun@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Cc: Pi-Hsun Shih , Erin Lo , Rob Herring , Ohad Ben-Cohen , Bjorn Andersson , Rob Herring , Mark Rutland , Matthias Brugger , "open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM" , "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" , "moderated list:ARM/Mediatek SoC support" , "moderated list:ARM/Mediatek SoC support" , open list List-ID: 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 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"; + }; -- 2.22.0.410.gd8fdbe21b5-goog