From mboxrd@z Thu Jan 1 00:00:00 1970 From: sachin.kamat@linaro.org (Sachin Kamat) Date: Thu, 8 May 2014 09:46:32 +0530 Subject: [PATCH v3 2/2] Documentation: DT: Exynos: Bind SRAM though DT In-Reply-To: <1399522592-23618-1-git-send-email-sachin.kamat@linaro.org> References: <1399522592-23618-1-git-send-email-sachin.kamat@linaro.org> Message-ID: <1399522592-23618-2-git-send-email-sachin.kamat@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Add SRAM binding documentation. Signed-off-by: Sachin Kamat Acked-by: Arnd Bergmann --- No changes since v1. --- .../devicetree/bindings/arm/exynos/smp-sram.txt | 38 ++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/exynos/smp-sram.txt diff --git a/Documentation/devicetree/bindings/arm/exynos/smp-sram.txt b/Documentation/devicetree/bindings/arm/exynos/smp-sram.txt new file mode 100644 index 000000000000..c9ff2f58f9b6 --- /dev/null +++ b/Documentation/devicetree/bindings/arm/exynos/smp-sram.txt @@ -0,0 +1,38 @@ +Samsung Exynos SRAM for SMP bringup: +------------------------------------ + +Samsung SMP-capable Exynos SoCs use part of the SRAM 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 SRAM. + +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-sram" : for Secure SYSRAM + "samsung,exynos4210-sram-ns" : for Non-secure SYSRAM + +The rest of the properties should follow the generic mmio-sram discription +found in ../../misc/sram.txt + +Example: + + sram at 02020000 { + compatible = "mmio-sram"; + reg = <0x02020000 0x54000>; + #address-cells = <1>; + #size-cells = <1>; + ranges = <0 0x02020000 0x54000>; + + smp-sram at 0 { + compatible = "samsung,exynos4210-sram"; + reg = <0x0 0x1000>; + }; + + smp-sram at 53000 { + compatible = "samsung,exynos4210-sram-ns"; + reg = <0x53000 0x1000>; + }; + }; -- 1.7.9.5