Commit e1679513 authored by Krzysztof Kozlowski's avatar Krzysztof Kozlowski Committed by Rob Herring
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dt-bindings: sram: Merge Samsung SRAM bindings into generic 



The Samsung SRAM bindings list only compatible so integrate them into
generic SRAM bindings schema.

Signed-off-by: default avatarKrzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
parent f6962991

Documentation/devicetree/bindings/sram/samsung-sram.txt

deleted100644 → 0
+0 −38
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Samsung Exynos SYSRAM for SMP bringup:

------------------------------------



Samsung SMP-capable Exynos SoCs use part of the SYSRAM for the bringup

of the secondary cores. Once the core gets powered up it executes the

code that is residing at some specific location of the SYSRAM.



Therefore reserved section sub-nodes have to be added to the mmio-sram

declaration. These nodes are of two types depending upon secure or

non-secure execution environment.



Required sub-node properties:

- compatible : depending upon boot mode, should be

		"samsung,exynos4210-sysram" : for Secure SYSRAM

		"samsung,exynos4210-sysram-ns" : for Non-secure SYSRAM



The rest of the properties should follow the generic mmio-sram discription

found in Documentation/devicetree/bindings/sram/sram.txt



Example:



	sysram@2020000 {

		compatible = "mmio-sram";

		reg = <0x02020000 0x54000>;

		#address-cells = <1>;

		#size-cells = <1>;

		ranges = <0 0x02020000 0x54000>;



		smp-sysram@0 {

			compatible = "samsung,exynos4210-sysram";

			reg = <0x0 0x1000>;

		};



		smp-sysram@53000 {

			compatible = "samsung,exynos4210-sysram-ns";

			reg = <0x53000 0x1000>;

		};

	};

Documentation/devicetree/bindings/sram/sram.yaml

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@@ -64,6 +64,9 @@ patternProperties: 
        description:

          Should contain a vendor specific string in the form

          <vendor>,[<device>-]<usage>

        enum:

          - samsung,exynos4210-sysram

          - samsung,exynos4210-sysram-ns



      reg:

        description:
@@ -134,3 +137,29 @@ examples: 
            export;

        };

    };



  - |

    // Samsung SMP-capable Exynos SoCs use part of the SYSRAM for the bringup

    // of the secondary cores. Once the core gets powered up it executes the

    // code that is residing at some specific location of the SYSRAM.

    //

    // Therefore reserved section sub-nodes have to be added to the mmio-sram

    // declaration. These nodes are of two types depending upon secure or

    // non-secure execution environment.

    sram@2020000 {

        compatible = "mmio-sram";

        reg = <0x02020000 0x54000>;

        #address-cells = <1>;

        #size-cells = <1>;

        ranges = <0 0x02020000 0x54000>;



        smp-sram@0 {

            compatible = "samsung,exynos4210-sysram";

            reg = <0x0 0x1000>;

        };



        smp-sram@53000 {

            compatible = "samsung,exynos4210-sysram-ns";

            reg = <0x53000 0x1000>;

        };

    };

MAINTAINERS

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@@ -2235,7 +2235,6 @@ F: drivers/soc/samsung/ 
F:	include/linux/soc/samsung/

F:	Documentation/arm/samsung/

F:	Documentation/devicetree/bindings/arm/samsung/

F:	Documentation/devicetree/bindings/sram/samsung-sram.txt

F:	Documentation/devicetree/bindings/power/pd-samsung.txt

N:	exynos