[PATCH v7 1/7] dt-bindings: Add a binding for Mediatek SCP

[PATCH v7 1/7] dt-bindings: Add a binding for Mediatek SCP

[Peter Shih]

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 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";
+	};
-- 
2.21.0.392.gf8f6787159e-goog

[PATCH v7 5/7] dt-bindings: Add binding for cros-ec-rpmsg.

[Peter Shih]

From: Pi-Hsun Shih <pihsun@chromium.org>

Add a DT binding documentation for ChromeOS EC driver over rpmsg.

Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
---
Changes from v6:
 - No change.

Changes from v5:
 - New patch.
---
 Documentation/devicetree/bindings/mfd/cros-ec.txt | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/mfd/cros-ec.txt b/Documentation/devicetree/bindings/mfd/cros-ec.txt
index 6245c9b1a68b..4860eabd0f72 100644
--- a/Documentation/devicetree/bindings/mfd/cros-ec.txt
+++ b/Documentation/devicetree/bindings/mfd/cros-ec.txt
@@ -3,7 +3,7 @@ ChromeOS Embedded Controller
 Google's ChromeOS EC is a Cortex-M device which talks to the AP and
 implements various function such as keyboard and battery charging.
 
-The EC can be connect through various means (I2C, SPI, LPC) and the
+The EC can be connect through various means (I2C, SPI, LPC, RPMSG) and the
 compatible string used depends on the interface. Each connection method has
 its own driver which connects to the top level interface-agnostic EC driver.
 Other Linux driver (such as cros-ec-keyb for the matrix keyboard) connect to
@@ -17,6 +17,9 @@ Required properties (SPI):
 - compatible: "google,cros-ec-spi"
 - reg: SPI chip select
 
+Required properties (RPMSG):
+- compatible: "google,cros-ec-rpmsg"
+
 Optional properties (SPI):
 - google,cros-ec-spi-pre-delay: Some implementations of the EC need a little
   time to wake up from sleep before they can receive SPI transfers at a high
-- 
2.21.0.392.gf8f6787159e-goog

Re: [PATCH v7 5/7] dt-bindings: Add binding for cros-ec-rpmsg.

[Rob Herring]

On Wed, Mar 27, 2019 at 01:14:47PM +0800, Peter Shih wrote:
> From: Pi-Hsun Shih <pihsun@chromium.org>
> 
> Add a DT binding documentation for ChromeOS EC driver over rpmsg.
> 
> Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
> ---
> Changes from v6:
>  - No change.
> 
> Changes from v5:
>  - New patch.
> ---
>  Documentation/devicetree/bindings/mfd/cros-ec.txt | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)

Acked-by: Rob Herring <robh@kernel.org>