ARM: dt: Add binding for Tegra PMC

The Tegra PMC (Power Management Controller) interfaces with an external
PMU (Power Management Unit), and controls wake-up from sleep modes.

This initial binding is the bare minimum required to control the PMC's
inversion of the PMU's interrupt signal.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
new file mode 100644 (file)
index 0000000..b5846e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
@@ -0,0 +1,19 @@
+NVIDIA Tegra Power Management Controller (PMC)
+
+Properties:
+- name : Should be pmc
+- compatible : Should contain "nvidia,tegra<chip>-pmc".
+- reg : Offset and length of the register set for the device
+- nvidia,invert-interrupt : If present, inverts the PMU interrupt signal.
+  The PMU is an external Power Management Unit, whose interrupt output
+  signal is fed into the PMC. This signal is optionally inverted, and then
+  fed into the ARM GIC. The PMC is not involved in the detection or
+  handling of this interrupt signal, merely its inversion.
+
+Example:
+
+pmc@7000f400 {
+       compatible = "nvidia,tegra20-pmc";
+       reg = <0x7000e400 0x400>;
+       nvidia,invert-interrupt;
+};

diff --git a/arch/arm/boot/dts/tegra-harmony.dts b/arch/arm/boot/dts/tegra-harmony.dts
index 9a52615c13b8114a462e9c3d2e473e7fc94d19a5..6e8447dc020203c537383caa219d6c23bf2e775c 100644 (file)
--- a/arch/arm/boot/dts/tegra-harmony.dts
+++ b/arch/arm/boot/dts/tegra-harmony.dts
@@ -10,6 +10,10 @@
                reg = < 0x00000000 0x40000000 >;
        };
 
+       pmc@7000f400 {
+               nvidia,invert-interrupt;
+       };
+
        i2c@7000c000 {
                clock-frequency = <400000>;
 

diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index 8712449be9e1ecae60c4b67dd6bae95dd9cb2da0..3195ad5562d34b6a1dfb0db5fa546a93a1150ad2 100644 (file)
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -4,6 +4,11 @@
        compatible = "nvidia,tegra20";
        interrupt-parent = <&intc>;
 
+       pmc@7000f400 {
+               compatible = "nvidia,tegra20-pmc";
+               reg = <0x7000e400 0x400>;
+       };
+
        intc: interrupt-controller@50041000 {
                compatible = "arm,cortex-a9-gic";
                interrupt-controller;

diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 8a7e230832d7dbe8667ce845c67221dd24e1fc6d..fd25e8e9ffd9b648da6af6ef0edc963ce047e5bd 100644 (file)
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -4,6 +4,11 @@
        compatible = "nvidia,tegra30";
        interrupt-parent = <&intc>;
 
+       pmc@7000f400 {
+               compatible = "nvidia,tegra20-pmc", "nvidia,tegra30-pmc";
+               reg = <0x7000e400 0x400>;
+       };
+
        intc: interrupt-controller@50041000 {
                compatible = "arm,cortex-a9-gic";
                interrupt-controller;