From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mikko Perttunen Subject: [PATCH v2 1/5] of: Add descriptions of thermtrip properties to Tegra PMC bindings Date: Wed, 13 Aug 2014 15:41:21 +0300 Message-ID: <1407933685-12404-2-git-send-email-mperttunen@nvidia.com> References: <1407933685-12404-1-git-send-email-mperttunen@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1407933685-12404-1-git-send-email-mperttunen@nvidia.com> Sender: linux-kernel-owner@vger.kernel.org To: swarren@wwwdotorg.org, thierry.reding@gmail.com Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, wni@nvidia.com, Mikko Perttunen List-Id: linux-tegra@vger.kernel.org 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 --- .../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@7000f400 { / Tegra board dts file { ... + pmc@7000f400 { + i2c-thermtrip { + nvidia,pmu = <&pmic>; + nvidia,reg-addr = <0x36>; + nvidia,reg-data = <0x2>; + }; + }; + ... clocks { compatible = "simple-bus"; #address-cells = <1>; -- 1.8.1.5