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authorKrzysztof Kozlowski <k.kozlowski@samsung.com>2015-11-19 09:42:49 +0900
committerRob Herring <robh@kernel.org>2015-12-09 15:29:37 -0600
commit22697acdd72d6749d603cb861d4f6c1c2b583c1b (patch)
treeab73830d9020f8c41971b38cb08a6eff374ec416 /Documentation/devicetree/bindings/sram/rockchip-smp-sram.txt
parent3d751eb057e6ed4e4fbce880c016ad967ba732d2 (diff)
dt-bindings: Consolidate SRAM bindings from all vendors
SRAM bindings for various SoCs, using the mmio-sram genalloc API, are spread over different places - per SoC vendor. Since all of these are quite similar (they depend on mmio-sram) move them to a common place. Suggested-by: Rob Herring <robh+dt@kernel.org> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Cc: Heiko Stuebner <heiko@sntech.de> Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Chen-Yu Tsai <wens@csie.org> Cc: Kukjin Kim <kgene@kernel.org> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Heiko Stuebner <heiko@sntech.de> Signed-off-by: Rob Herring <robh@kernel.org>
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+Rockchip SRAM for smp bringup:
+------------------------------
+
+Rockchip's smp-capable SoCs use the first part of the sram for the bringup
+of the cores. Once the core gets powered up it executes the code that is
+residing at the very beginning of the sram.
+
+Therefore a reserved section sub-node has to be added to the mmio-sram
+declaration.
+
+Required sub-node properties:
+- compatible : should be "rockchip,rk3066-smp-sram"
+
+The rest of the properties should follow the generic mmio-sram discription
+found in Documentation/devicetree/bindings/sram/sram.txt
+
+Example:
+
+ sram: sram@10080000 {
+ compatible = "mmio-sram";
+ reg = <0x10080000 0x10000>;
+ #address-cells = <1>;
+ #size-cells = <1>;
+ ranges;
+
+ smp-sram@10080000 {
+ compatible = "rockchip,rk3066-smp-sram";
+ reg = <0x10080000 0x50>;
+ };
+ };