[PATCH 1/3] ARM: dt: Add binding for Tegra PMC
From: Stephen Warren <hidden>
Date: 2012-01-25 21:43:27
Also in:
linux-arm-kernel, linux-tegra
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
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 <redacted> --- .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 19 +++++++++++++++++++ arch/arm/boot/dts/tegra-harmony.dts | 4 ++++ arch/arm/boot/dts/tegra20.dtsi | 5 +++++ arch/arm/boot/dts/tegra30.dtsi | 5 +++++ 4 files changed, 33 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
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
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 9a52615..6e8447d 100644
--- 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 f00aad1..ec1f010 100644
--- 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 4f284ea..ac4b75c 100644
--- 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;
--
1.7.0.4