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@xxxxxxx>
---
Cc: Bjorn Andersson <andersson@xxxxxxxxxx>
Cc: Conor Dooley <conor+dt@xxxxxxxxxx>
Cc: Fabio Estevam <festevam@xxxxxxxxx>
Cc: Krzysztof Kozlowski <krzysztof.kozlowski+dt@xxxxxxxxxx>
Cc: Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>
Cc: NXP Linux Team <linux-imx@xxxxxxx>
Cc: Peng Fan <peng.fan@xxxxxxx>
Cc: Pengutronix Kernel Team <kernel@xxxxxxxxxxxxxx>
Cc: Rob Herring <robh+dt@xxxxxxxxxx>
Cc: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
Cc: Shawn Guo <shawnguo@xxxxxxxxxx>
Cc: devicetree@xxxxxxxxxxxxxxx
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-remoteproc@xxxxxxxxxxxxxxx
---
V2: Rename 'gpr' to 'fsl,iomuxc-gpr'
V3: Rename 'gpr' to 'fsl,iomuxc-gpr' everywhere
---
Note that the MMIO being discerned using compatible string is similar
approach to "st,stm32mp1-rcc" vs "st,stm32mp1-rcc-secure".
---
.../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 0c3910f152d1d..30632efdad8bb 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
@@ -70,6 +72,11 @@ properties:
description:
Specify CPU entry address for SCU enabled processor.
+ fsl,iomuxc-gpr:
+ $ref: /schemas/types.yaml#/definitions/phandle
+ description:
+ Phandle to IOMUXC GPR block which provide access to CM7 CPUWAIT bit.
+
fsl,resource-id:
$ref: /schemas/types.yaml#/definitions/uint32
description:
@@ -79,6 +86,19 @@ properties:
required:
- compatible
+allOf:
+ - if:
+ properties:
+ compatible:
+ not:
+ contains:
+ enum:
+ - fsl,imx8mn-cm7-mmio
+ - fsl,imx8mp-cm7-mmio
+ then:
+ properties:
+ fsl,iomuxc-gpr: false
+
additionalProperties: false
examples:
--
2.40.1
