[PATCH v3 2/2] Documentation: DT: Exynos: Bind SRAM though DT
Sachin Kamat
sachin.kamat at linaro.org
Wed May 7 21:16:32 PDT 2014
Add SRAM binding documentation.
Signed-off-by: Sachin Kamat <sachin.kamat at linaro.org>
Acked-by: Arnd Bergmann <arnd at arndb.de>
---
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
More information about the linux-arm-kernel
mailing list