[PATCH v2 1/5] of: Add descriptions of thermtrip properties to Tegra PMC bindings
From: mperttunen@nvidia.com (Mikko Perttunen)
Date: 2014-08-13 12:42:20
Also in:
linux-tegra, lkml
Subsystem:
open firmware and flattened device tree bindings, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Hardware-triggered thermal reset requires configuring the I2C reset procedure. This configuration is read from the device tree, so document the relevant properties in the binding documentation. Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com> --- .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
index 68ac65f..ae6aef8 100644
--- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt
+++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt@@ -47,6 +47,19 @@ Required properties when nvidia,suspend-mode=<0>: sleep mode, the warm boot code will restore some PLLs, clocks and then bring up CPU0 for resuming the system. +Hardware-triggered thermal reset: +On Tegra30, Tegra114 and Tegra124, if the 'i2c-thermtrip' subnode exists, +hardware-triggered thermal reset will be enabled. + +Required properties for hardware-triggered thermal reset (inside 'i2c-thermtrip'): +- nvidia,pmu : Phandle to power management unit / PMIC handling poweroff +- nvidia,reg-addr : I2C register address to write poweroff command to +- nvidia,reg-data : Poweroff command to write to PMU + +Optional properties for hardware-triggered thermal reset (inside 'i2c-thermtrip'): +- nvidia,pinmux-id : Pinmux used by the hardware when issuing poweroff command. + Defaults to 0. + Example: / SoC dts including file
@@ -69,6 +82,14 @@ pmc at 7000f400 { / Tegra board dts file { ... + pmc at 7000f400 { + i2c-thermtrip { + nvidia,pmu = <&pmic>; + nvidia,reg-addr = <0x36>; + nvidia,reg-data = <0x2>; + }; + }; + ... clocks { compatible = "simple-bus"; #address-cells = <1>;
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1.8.1.5