[PATCH 1/2] dt-bindings: remoteproc: imx_rproc: Support i.MX8MN/P MMIO

[Marek Vasut <marex@denx.de>]

The MX8M CM7 boot via SMC call is problematic, since not all versions
of ATF support this interface. Document MMIO support used to boot the
CM7 on MX8MN/MP instead and discern MMIO interface using DT compatible
string. Document GPR register syscon phandle which is required by the
MMIO interface too.

Signed-off-by: Marek Vasut <marex@denx.de>
---
Note that the MMIO being discerned using compatible string is similar
approach to "st,stm32mp1-rcc" vs "st,stm32mp1-rcc-secure".
---
Cc: Bjorn Andersson <andersson@kernel.org>
Cc: Conor Dooley <conor+dt@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: devicetree@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-remoteproc@vger.kernel.org
---
 .../bindings/remoteproc/fsl,imx-rproc.yaml    | 20 +++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
index c940199ce89df..78bb976f738ee 100644
--- a/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/fsl,imx-rproc.yaml
@@ -20,7 +20,9 @@ properties:
       - fsl,imx7ulp-cm4
       - fsl,imx8mm-cm4
       - fsl,imx8mn-cm7
+      - fsl,imx8mn-cm7-mmio
       - fsl,imx8mp-cm7
+      - fsl,imx8mp-cm7-mmio
       - fsl,imx8mq-cm4
       - fsl,imx8qm-cm4
       - fsl,imx8qxp-cm4
@@ -30,6 +32,11 @@ properties:
   clocks:
     maxItems: 1
 
+  gpr:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      Phandle to IOMUXC GPR block which provide access to CM7 CPUWAIT bit.
+
   syscon:
     $ref: /schemas/types.yaml#/definitions/phandle
     description:
@@ -84,6 +91,19 @@ properties:
 required:
   - compatible
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          not:
+            contains:
+              enum:
+                - fsl,imx8mn-cm7-mmio
+                - fsl,imx8mp-cm7-mmio
+    then:
+      properties:
+        gpr: false
+
 additionalProperties: false
 
 examples:
-- 
2.40.1