On Thu, Jul 20, 2023 at 02:55:48PM +0200, Marek Vasut wrote: > 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' > --- > 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..cd352fd38e891 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: > + gpr: false Not the right property name. > + > additionalProperties: false > > examples: > -- > 2.40.1 >
