ARM: rockchip: add sram dt nodes and documentation
From: Heiko Stuebner <heiko@...> Date: Mon, 17 Jun 2013 22:08:31 +0200
Commit-Message
The Rockchip SoCs need a special part of their sram for bringup of additional cores. Therefore also limit the public area when adding the mmio-sram node to keep the sram driver from using this space. Signed-off-by: Heiko Stuebner <heiko@...> Tested-by: Ulrich Prinz <ulrich.prinz@...>
Patch-Comment
.../devicetree/bindings/arm/rockchip/smp-sram.txt | 24 ++++++++++++++++++++ arch/arm/boot/dts/rk3066a.dtsi | 6 +++++ arch/arm/boot/dts/rk3188.dtsi | 6 +++++ 3 files changed, 36 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt
Statistics
- 36 lines added
- 0 lines removed
Changes
--------- Documentation/devicetree/bindings/arm/rockchip/smp-sram.txt ----------
new file mode 100644
index 0000000..0c88d06
@@ -0,0 +1,24 @@
+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 the available space has to be limited to exclude this area using
+the available property of the sram node.
+
+Required node properties:
+- compatible : should contain both "rockchip,rk3066-sram", "mmio-sram"
+ so that the smp code can select the correct sram node.
+
+The rest of the properties should follow the generic mmio-sram discription
+found in ../../misc/sram.txt
+
+Example:
+
+ sram: sram@10080000 {
+ compatible = "rockchip,rk3066-sram", "mmio-sram";
+ reg = <0x10080000 0x10000>;
+ available = <0x50 0xffb0>;
+ };
------------------------ arch/arm/boot/dts/rk3066a.dtsi ------------------------
index 2218c64..e91048b 100644
@@ -64,6 +64,12 @@
clock-names = "timer", "pclk";
};
+ sram: sram@10080000 {
+ compatible = "rockchip,rk3066-sram", "mmio-sram";
+ reg = <0x10080000 0x10000>;
+ available = <0x50 0xffb0>;
+ };
+
pinctrl@20008000 {
compatible = "rockchip,rk3066a-pinctrl";
reg = <0x20008000 0x150>;
------------------------ arch/arm/boot/dts/rk3188.dtsi -------------------------
index 1a26b03..a9885df 100644
@@ -60,6 +60,12 @@
interrupts = <GIC_PPI 13 0xf04>;
};
+ sram: sram@10080000 {
+ compatible = "rockchip,rk3066-sram", "mmio-sram";
+ reg = <0x10080000 0x8000>;
+ available = <0x50 0x7fb0>;
+ };
+
pinctrl@20008000 {
compatible = "rockchip,rk3188-pinctrl";
reg = <0x20008000 0xa0>,