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author | Sachin Kamat <sachin.kamat@linaro.org> | 2014-05-13 07:13:47 +0900 |
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committer | Kukjin Kim <kgene.kim@samsung.com> | 2014-05-15 03:30:29 +0900 |
commit | d7067f1c5fa0232001502569c6878d22308da268 (patch) | |
tree | a613a3fa1631f575e18aa18bfec3b404b5ebbac8 /Documentation/devicetree/bindings/arm | |
parent | b3205dea8fbf6db9b1e46a0dad19a0712fdff44f (diff) | |
download | op-kernel-dev-d7067f1c5fa0232001502569c6878d22308da268.zip op-kernel-dev-d7067f1c5fa0232001502569c6878d22308da268.tar.gz |
devicetree: bindings: document SYSRAM binding
Add SRAM binding documentation.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Tomasz Figa <t.figa@samsung.com>
[kgene.kim@samsung.com: changed name SRAM to SYSRAM]
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Diffstat (limited to 'Documentation/devicetree/bindings/arm')
-rw-r--r-- | Documentation/devicetree/bindings/arm/exynos/smp-sysram.txt | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/exynos/smp-sysram.txt b/Documentation/devicetree/bindings/arm/exynos/smp-sysram.txt new file mode 100644 index 0000000..4a0a4f7 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/exynos/smp-sysram.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 ../../misc/sysram.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>; + }; + }; |