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f085f672b7
This patch adds i.MX7 thermal sensor support, most of the i.MX7 thermal sensor functions are same with i.MX6 except the registers offset/layout, so we move those registers offset/layout definitions to soc data structure. i.MX7 uses single calibration data @25C, the calibration data is located at OCOTP offset 0x4F0, bit[17:9], the formula is as below: Tmeas = (Nmeas - n1) + 25; n1 is the fuse value for 25C. Signed-off-by: Anson Huang <Anson.Huang@nxp.com> Signed-off-by: Bai Ping <ping.bai@nxp.com> Acked-by: Dong Aisheng <aisheng.dong@nxp.com> Acked-by: Shawn Guo <shawnguo@kernel.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Eduardo Valentin <edubezval@gmail.com>
61 lines
2 KiB
Text
61 lines
2 KiB
Text
* Temperature Monitor (TEMPMON) on Freescale i.MX SoCs
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Required properties:
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- compatible : must be one of following:
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- "fsl,imx6q-tempmon" for i.MX6Q,
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- "fsl,imx6sx-tempmon" for i.MX6SX,
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- "fsl,imx7d-tempmon" for i.MX7S/D.
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- interrupts : the interrupt output of the controller:
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i.MX6Q has one IRQ which will be triggered when temperature is higher than high threshold,
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i.MX6SX and i.MX7S/D have two more IRQs than i.MX6Q, one is IRQ_LOW and the other is IRQ_PANIC,
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when temperature is below than low threshold, IRQ_LOW will be triggered, when temperature
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is higher than panic threshold, system will auto reboot by SRC module.
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- fsl,tempmon : phandle pointer to system controller that contains TEMPMON
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control registers, e.g. ANATOP on imx6q.
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- nvmem-cells: A phandle to the calibration cells provided by ocotp.
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- nvmem-cell-names: Should be "calib", "temp_grade".
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Deprecated properties:
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- fsl,tempmon-data : phandle pointer to fuse controller that contains TEMPMON
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calibration data, e.g. OCOTP on imx6q. The details about calibration data
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can be found in SoC Reference Manual.
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Direct access to OCOTP via fsl,tempmon-data is incorrect on some newer chips
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because it does not handle OCOTP clock requirements.
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Optional properties:
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- clocks : thermal sensor's clock source.
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Example:
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ocotp: ocotp@21bc000 {
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#address-cells = <1>;
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#size-cells = <1>;
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compatible = "fsl,imx6sx-ocotp", "syscon";
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reg = <0x021bc000 0x4000>;
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clocks = <&clks IMX6SX_CLK_OCOTP>;
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tempmon_calib: calib@38 {
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reg = <0x38 4>;
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};
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tempmon_temp_grade: temp-grade@20 {
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reg = <0x20 4>;
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};
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};
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tempmon: tempmon {
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compatible = "fsl,imx6sx-tempmon", "fsl,imx6q-tempmon";
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interrupts = <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
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fsl,tempmon = <&anatop>;
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nvmem-cells = <&tempmon_calib>, <&tempmon_temp_grade>;
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nvmem-cell-names = "calib", "temp_grade";
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clocks = <&clks IMX6SX_CLK_PLL3_USB_OTG>;
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};
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Legacy method (Deprecated):
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tempmon {
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compatible = "fsl,imx6q-tempmon";
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fsl,tempmon = <&anatop>;
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fsl,tempmon-data = <&ocotp>;
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clocks = <&clks 172>;
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};
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