diff options
authorSylwester Nawrocki <s.nawrocki@samsung.com>2013-04-04 16:04:09 +0900
committerKukjin Kim <kgene.kim@samsung.com>2013-04-09 01:39:19 +0900
commita64b1b220bd76cebfc2b2dad80f8365d770eee91 (patch)
parent06c460b73f75894cabfb1f5277f27cddbc92745c (diff)
ARM: dts: Add SYSREG block node for S5P/Exynos4 SoC series
This patch adds device tree node for the SYSREG registers block found in Samsung S5P/Exynos SoC series. The SYSREG module generates control signals for the ARM CPU and various IP blocks and buses. SYSREG block registers are exposed through APB bus interface. A sysreg device tree node is to be associated with mfd syscon driver and all SYSREG clients should use regmap interface it provides. It allows to eliminate any possible races and conflicts should different drivers attempt to concurrently access same register. Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
2 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/samsung/sysreg.txt b/Documentation/devicetree/bindings/arm/samsung/sysreg.txt
new file mode 100644
index 000000000000..5039c0a12f55
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/samsung/sysreg.txt
@@ -0,0 +1,7 @@
+SAMSUNG S5P/Exynos SoC series System Registers (SYSREG)
+ - name : should be 'sysreg';
+ - compatible : should contain "samsung,<chip name>-sysreg", "syscon";
+ For Exynos4 SoC series it should be "samsung,exynos4-sysreg", "syscon";
+ - reg : offset and length of the register set.
diff --git a/arch/arm/boot/dts/exynos4.dtsi b/arch/arm/boot/dts/exynos4.dtsi
index aa21e2e9665e..800ff11fe6fb 100644
--- a/arch/arm/boot/dts/exynos4.dtsi
+++ b/arch/arm/boot/dts/exynos4.dtsi
@@ -82,6 +82,11 @@
reg = <0x10440000 0x1000>;
+ sys_reg: sysreg {
+ compatible = "samsung,exynos4-sysreg", "syscon";
+ reg = <0x10010000 0x400>;
+ };
watchdog@10060000 {
compatible = "samsung,s3c2410-wdt";
reg = <0x10060000 0x100>;