67 lines
2.3 KiB
Plaintext
67 lines
2.3 KiB
Plaintext
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Qualcomm QPNP Temperature Alarm
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QPNP temperature alarm peripherals are found inside of Qualcomm PMIC chips that
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utilize the MSM SPMI implementation. These peripherals provide an interrupt
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signal and status register to identify high PMIC die temperature.
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Required properties:
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- compatible: Must be "qcom,qpnp-temp-alarm".
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- reg: Specifies the SPMI address and size for this temperature
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alarm device.
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- interrupts: PMIC temperature alarm interrupt
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- label: A string used as a descriptive name for this thermal device.
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This name should be 19 characters or less.
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Required structure:
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- A qcom,qpnp-temp-alarm node must be a child of an SPMI node that has specified
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the spmi-slave-container property
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Optional properties:
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- qcom,channel-num: VADC channel number associated PMIC DIE_TEMP thermistor.
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If no channel is specified, then the die temperature
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must be estimated based on the over temperature stage.
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- qcom,threshold-set: Integer value which specifies which set of threshold
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temperatures to use for the over temperature stages.
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Possible values (x = {stage 1 threshold temperature,
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stage 2 threshold temperature,
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stage 3 threshold temperature}):
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0 = {105 C, 125 C, 145 C}
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1 = {110 C, 130 C, 150 C}
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2 = {115 C, 135 C, 155 C}
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3 = {120 C, 140 C, 160 C}
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- qcom,allow-override: Boolean which controls the ability of software to
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override shutdowns. If present, then software is
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allowed to override automatic PMIC hardware stage 2 and
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stage 3 over temperature shutdowns. Otherwise, software
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is not allowed to override automatic shutdown.
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- qcom,default-temp: Specifies the default temperature in millicelcius to use
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if no ADC channel is present to read the real time
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temperature.
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Note, if a given optional qcom,* binding is not present, then the default
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hardware state for that feature will be maintained.
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Example:
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&spmi_bus {
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#address-cells = <1>;
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#size-cells = <0>;
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interrupt-controller;
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#interrupt-cells = <3>;
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qcom,pm8941@0 {
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spmi-slave-container;
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reg = <0x0>;
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#address-cells = <1>;
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#size-cells = <1>;
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qcom,temp-alarm@2400 {
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compatible = "qcom,qpnp-temp-alarm";
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reg = <0x2400 0x100>;
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interrupts = <0x0 0x24 0x0>;
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label = "pm8941_tz";
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qcom,channel-num = <8>;
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qcom,threshold-set = <0>;
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};
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};
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};
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