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Diffstat (limited to 'Documentation/devicetree/bindings/thermal/imx-thermal.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/thermal/imx-thermal.txt | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/thermal/imx-thermal.txt b/Documentation/devicetree/bindings/thermal/imx-thermal.txt new file mode 100644 index 000000000..823e4176e --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/imx-thermal.txt @@ -0,0 +1,61 @@ +* Temperature Monitor (TEMPMON) on Freescale i.MX SoCs + +Required properties: +- compatible : must be one of following: + - "fsl,imx6q-tempmon" for i.MX6Q, + - "fsl,imx6sx-tempmon" for i.MX6SX, + - "fsl,imx7d-tempmon" for i.MX7S/D. +- interrupts : the interrupt output of the controller: + i.MX6Q has one IRQ which will be triggered when temperature is higher than high threshold, + i.MX6SX and i.MX7S/D have two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC, + when temperature is below than low threshold, IRQ_LOW will be triggered, when temperature + is higher than panic threshold, system will auto reboot by SRC module. +- fsl,tempmon : phandle pointer to system controller that contains TEMPMON + control registers, e.g. ANATOP on imx6q. +- nvmem-cells: A phandle to the calibration cells provided by ocotp. +- nvmem-cell-names: Should be "calib", "temp_grade". + +Deprecated properties: +- fsl,tempmon-data : phandle pointer to fuse controller that contains TEMPMON + calibration data, e.g. OCOTP on imx6q. The details about calibration data + can be found in SoC Reference Manual. + +Direct access to OCOTP via fsl,tempmon-data is incorrect on some newer chips +because it does not handle OCOTP clock requirements. + +Optional properties: +- clocks : thermal sensor's clock source. + +Example: +ocotp: ocotp@21bc000 { + #address-cells = <1>; + #size-cells = <1>; + compatible = "fsl,imx6sx-ocotp", "syscon"; + reg = <0x021bc000 0x4000>; + clocks = <&clks IMX6SX_CLK_OCOTP>; + + tempmon_calib: calib@38 { + reg = <0x38 4>; + }; + + tempmon_temp_grade: temp-grade@20 { + reg = <0x20 4>; + }; +}; + +tempmon: tempmon { + compatible = "fsl,imx6sx-tempmon", "fsl,imx6q-tempmon"; + interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>; + fsl,tempmon = <&anatop>; + nvmem-cells = <&tempmon_calib>, <&tempmon_temp_grade>; + nvmem-cell-names = "calib", "temp_grade"; + clocks = <&clks IMX6SX_CLK_PLL3_USB_OTG>; +}; + +Legacy method (Deprecated): +tempmon { + compatible = "fsl,imx6q-tempmon"; + fsl,tempmon = <&anatop>; + fsl,tempmon-data = <&ocotp>; + clocks = <&clks 172>; +}; |