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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
commit | 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch) | |
tree | fa581f6dc1c0596391690d1f67eceef3af8246dc /Documentation/devicetree/bindings/sram/samsung-sram.txt | |
parent | d4e493caf788ef44982e131ff9c786546904d934 (diff) |
Linux-libre 4.5-gnu
Diffstat (limited to 'Documentation/devicetree/bindings/sram/samsung-sram.txt')
-rw-r--r-- | Documentation/devicetree/bindings/sram/samsung-sram.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sram/samsung-sram.txt b/Documentation/devicetree/bindings/sram/samsung-sram.txt new file mode 100644 index 000000000..6bc474b2b --- /dev/null +++ b/Documentation/devicetree/bindings/sram/samsung-sram.txt @@ -0,0 +1,38 @@ +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@02020000 { + 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>; + }; + }; |