Messages in this thread Patch in this message | | | From | Mikko Perttunen <> | Subject | [PATCH v4 REPOST 1/5] of: Add descriptions of thermtrip properties to Tegra PMC bindings | Date | Mon, 10 Nov 2014 15:12:13 +0200 |
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From: Mikko Perttunen <mperttunen@nvidia.com>
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> Reviewed-by: Wei Ni <wni@nvidia.com> Tested-by: Wei Ni <wni@nvidia.com> --- .../bindings/arm/tegra/nvidia,tegra20-pmc.txt | 24 ++++++++++++++++++++++ 1 file changed, 24 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..dc13fb0 100644 --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt @@ -47,6 +47,21 @@ 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,i2c-bus : Phandle to I2C bus containing the PMU +- nvidia,bus-addr : Bus address of the PMU on the I2C bus +- 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. Valid values are described in section 12.5.2 + "Pinmux Support" of the Tegra4 Technical Reference Manual. + Example: / SoC dts including file @@ -69,6 +84,15 @@ pmc@7000f400 { / Tegra board dts file { ... + pmc@7000f400 { + i2c-thermtrip { + nvidia,i2c-bus = <&pmic_bus>; + nvidia,bus-addr = <0x40>; + nvidia,reg-addr = <0x36>; + nvidia,reg-data = <0x2>; + }; + }; + ... clocks { compatible = "simple-bus"; #address-cells = <1>; -- 2.1.3
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