linux-kernel - [PATCH v2 1/5] of: Add descriptions of thermtrip properties to Tegra PMC bindings

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Message-ID: <1407933685-12404-2-git-send-email-mperttunen@nvidia.com>
Date:	Wed, 13 Aug 2014 15:41:21 +0300
From:	Mikko Perttunen <mperttunen@...dia.com>
To:	<swarren@...dotorg.org>, <thierry.reding@...il.com>
CC:	<linux-kernel@...r.kernel.org>,
	<linux-arm-kernel@...ts.infradead.org>,
	<linux-tegra@...r.kernel.org>, <wni@...dia.com>,
	Mikko Perttunen <mperttunen@...dia.com>
Subject: [PATCH v2 1/5] of: Add descriptions of thermtrip properties to Tegra PMC bindings

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@...dia.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@...0f400 {
 / Tegra board dts file
 {
 	...
+	pmc@...0f400 {
+		i2c-thermtrip {
+			nvidia,pmu = <&pmic>;
+			nvidia,reg-addr = <0x36>;
+			nvidia,reg-data = <0x2>;
+		};
+	};
+	...
 	clocks {
 		compatible = "simple-bus";
 		#address-cells = <1>;
-- 
1.8.1.5

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