From: Florian Fainelli Date: Tue, 4 Feb 2020 23:55:51 +0000 (-0800) Subject: dt-bindings: arm: Document Broadcom SoCs 'secondary-boot-reg' X-Git-Tag: v5.15~4151^2~36^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=14e1eb5a91a96d9e1ce8051f752b7b6645bc8e10;p=platform%2Fkernel%2Flinux-starfive.git dt-bindings: arm: Document Broadcom SoCs 'secondary-boot-reg' Consolidate and move the 'secondary-boot-reg' property from the 3 existing binding documents into the main cpus.yaml documentation, also make sure that the property is enforced when relevant. Acked-by: Maxime Ripard Acked-by: Scott Branden Reviewed-by: Rob Herring Signed-off-by: Florian Fainelli --- diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm11351-cpu-method.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,bcm11351-cpu-method.txt deleted file mode 100644 index e3f9969..0000000 --- a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm11351-cpu-method.txt +++ /dev/null @@ -1,36 +0,0 @@ -Broadcom Kona Family CPU Enable Method --------------------------------------- -This binding defines the enable method used for starting secondary -CPUs in the following Broadcom SoCs: - BCM11130, BCM11140, BCM11351, BCM28145, BCM28155, BCM21664 - -The enable method is specified by defining the following required -properties in the "cpu" device tree node: - - enable-method = "brcm,bcm11351-cpu-method"; - - secondary-boot-reg = <...>; - -The secondary-boot-reg property is a u32 value that specifies the -physical address of the register used to request the ROM holding pen -code release a secondary CPU. The value written to the register is -formed by encoding the target CPU id into the low bits of the -physical start address it should jump to. - -Example: - cpus { - #address-cells = <1>; - #size-cells = <0>; - - cpu0: cpu@0 { - device_type = "cpu"; - compatible = "arm,cortex-a9"; - reg = <0>; - }; - - cpu1: cpu@1 { - device_type = "cpu"; - compatible = "arm,cortex-a9"; - reg = <1>; - enable-method = "brcm,bcm11351-cpu-method"; - secondary-boot-reg = <0x3500417c>; - }; - }; diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm23550-cpu-method.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,bcm23550-cpu-method.txt deleted file mode 100644 index a3af54c..0000000 --- a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm23550-cpu-method.txt +++ /dev/null @@ -1,36 +0,0 @@ -Broadcom Kona Family CPU Enable Method --------------------------------------- -This binding defines the enable method used for starting secondary -CPUs in the following Broadcom SoCs: - BCM23550 - -The enable method is specified by defining the following required -properties in the "cpu" device tree node: - - enable-method = "brcm,bcm23550"; - - secondary-boot-reg = <...>; - -The secondary-boot-reg property is a u32 value that specifies the -physical address of the register used to request the ROM holding pen -code release a secondary CPU. The value written to the register is -formed by encoding the target CPU id into the low bits of the -physical start address it should jump to. - -Example: - cpus { - #address-cells = <1>; - #size-cells = <0>; - - cpu0: cpu@0 { - device_type = "cpu"; - compatible = "arm,cortex-a9"; - reg = <0>; - }; - - cpu1: cpu@1 { - device_type = "cpu"; - compatible = "arm,cortex-a9"; - reg = <1>; - enable-method = "brcm,bcm23550"; - secondary-boot-reg = <0x3500417c>; - }; - }; diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt deleted file mode 100644 index 677ef9d9..0000000 --- a/Documentation/devicetree/bindings/arm/bcm/brcm,nsp-cpu-method.txt +++ /dev/null @@ -1,39 +0,0 @@ -Broadcom Northstar Plus SoC CPU Enable Method ---------------------------------------------- -This binding defines the enable method used for starting secondary -CPU in the following Broadcom SoCs: - BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312 - -The enable method is specified by defining the following required -properties in the corresponding secondary "cpu" device tree node: - - enable-method = "brcm,bcm-nsp-smp"; - - secondary-boot-reg = <...>; - -The secondary-boot-reg property is a u32 value that specifies the -physical address of the register which should hold the common -entry point for a secondary CPU. This entry is cpu node specific -and should be added per cpu. E.g., in case of NSP (BCM58625) which -is a dual core CPU SoC, this entry should be added to cpu1 node. - - -Example: - cpus { - #address-cells = <1>; - #size-cells = <0>; - - cpu0: cpu@0 { - device_type = "cpu"; - compatible = "arm,cortex-a9"; - next-level-cache = <&L2>; - reg = <0>; - }; - - cpu1: cpu@1 { - device_type = "cpu"; - compatible = "arm,cortex-a9"; - next-level-cache = <&L2>; - enable-method = "brcm,bcm-nsp-smp"; - secondary-boot-reg = <0xffff042c>; - reg = <1>; - }; - }; diff --git a/Documentation/devicetree/bindings/arm/cpus.yaml b/Documentation/devicetree/bindings/arm/cpus.yaml index 7a9c3ce..644dfc5 100644 --- a/Documentation/devicetree/bindings/arm/cpus.yaml +++ b/Documentation/devicetree/bindings/arm/cpus.yaml @@ -287,6 +287,39 @@ properties: While optional, it is the preferred way to get access to the cpu-core power-domains. + secondary-boot-reg: + $ref: '/schemas/types.yaml#/definitions/uint32' + description: | + Required for systems that have an "enable-method" property value of + "brcm,bcm11351-cpu-method", "brcm,bcm23550" or "brcm,bcm-nsp-smp". + + This includes the following SoCs: | + BCM11130, BCM11140, BCM11351, BCM28145, BCM28155, BCM21664, BCM23550 + BCM58522, BCM58525, BCM58535, BCM58622, BCM58623, BCM58625, BCM88312 + + The secondary-boot-reg property is a u32 value that specifies the + physical address of the register used to request the ROM holding pen + code release a secondary CPU. The value written to the register is + formed by encoding the target CPU id into the low bits of the + physical start address it should jump to. + +if: + # If the enable-method property contains one of those values + properties: + enable-method: + contains: + enum: + - brcm,bcm11351-cpu-method + - brcm,bcm23550 + - brcm,bcm-nsp-smp + # and if enable-method is present + required: + - enable-method + +then: + required: + - secondary-boot-reg + required: - device_type - reg