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| author | Mikko Perttunen <mperttunen@nvidia.com> | 2015-01-06 13:52:56 +0300 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2015-01-23 17:32:00 +0300 |
| commit | f58d47258131aa2d0243fc1dc78e2adc578d5de4 (patch) | |
| tree | be75d34fb96897eeb3884e29037503c894214a5c /Documentation/devicetree/bindings/arm/tegra | |
| parent | a9a40a4a58bac4ff92d0c7e5aa82043074533a6a (diff) | |
| download | linux-f58d47258131aa2d0243fc1dc78e2adc578d5de4.tar.xz | |
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@nvidia.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'Documentation/devicetree/bindings/arm/tegra')
| -rw-r--r-- | Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt index 68ac65f82a1c..2fd50511ab4b 100644 --- a/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt +++ b/Documentation/devicetree/bindings/arm/tegra/nvidia,tegra20-pmc.txt @@ -47,6 +47,23 @@ 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-controller-id : ID of I2C controller to send poweroff command to. Valid values are + described in section 9.2.148 "APBDEV_PMC_SCRATCH53_0" of the + Tegra K1 Technical Reference Manual. +- 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 +86,15 @@ pmc@7000f400 { / Tegra board dts file { ... + pmc@7000f400 { + i2c-thermtrip { + nvidia,i2c-controller-id = <4>; + nvidia,bus-addr = <0x40>; + nvidia,reg-addr = <0x36>; + nvidia,reg-data = <0x2>; + }; + }; + ... clocks { compatible = "simple-bus"; #address-cells = <1>; |