From: Pi-Hsun Shih <pihsun@chromium.org>
Cc: Ohad Ben-Cohen <ohad@wizery.com>, Rob Herring <robh@kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, Erin Lo <erin.lo@mediatek.com>,
"open list:REMOTE PROCESSOR REMOTEPROC SUBSYSTEM"
<linux-remoteproc@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
"moderated list:ARM/Mediatek SoC support"
<linux-mediatek@lists.infradead.org>,
Pi-Hsun Shih <pihsun@chromium.org>,
Matthias Brugger <matthias.bgg@gmail.com>,
Mark Rutland <mark.rutland@arm.com>,
"moderated list:ARM/Mediatek SoC support"
<linux-arm-kernel@lists.infradead.org>
Subject: [PATCH v21 1/4] dt-bindings: Add a binding for Mediatek SCP
Date: Tue, 12 Nov 2019 19:03:24 +0800 [thread overview]
Message-ID: <20191112110330.179649-2-pihsun@chromium.org> (raw)
In-Reply-To: <20191112110330.179649-1-pihsun@chromium.org>
From: Erin Lo <erin.lo@mediatek.com>
Add a DT binding documentation of SCP for the
MT8183 SoC from Mediatek.
Signed-off-by: Erin Lo <erin.lo@mediatek.com>
Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Reviewed-by: Rob Herring <robh@kernel.org>
---
Changes from v20 ... 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";
+ };
--
2.24.0.rc1.363.gb1bccd3e3d-goog
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next prev parent reply other threads:[~2019-11-12 11:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-12 11:03 [PATCH v21 0/4] Add support for mt8183 SCP Pi-Hsun Shih
2019-11-12 11:03 ` Pi-Hsun Shih [this message]
2019-11-12 11:03 ` [PATCH v21 2/4] remoteproc/mediatek: add SCP support for mt8183 Pi-Hsun Shih
2019-11-12 11:03 ` [PATCH v21 3/4] rpmsg: add rpmsg support for mt8183 SCP Pi-Hsun Shih
2019-11-12 11:03 ` [PATCH v21 4/4] arm64: dts: mt8183: add scp node Pi-Hsun Shih
2020-08-27 10:14 ` Matthias Brugger
2020-09-02 14:40 ` Naresh Kamboju
2020-09-02 16:23 ` Krzysztof Kozlowski
2020-09-09 7:37 ` Jon Hunter
2020-09-09 8:18 ` Pi-Hsun Shih
2020-09-09 8:26 ` Matthias Brugger
2020-09-10 10:51 ` Matthias Brugger
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