43 lines
1.2 KiB
Plaintext
Executable File
43 lines
1.2 KiB
Plaintext
Executable File
NXP PCF85263 I2C Real Time Clock
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Required properties:
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- compatible: must be: "nxp,rtc-pcf85263"
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- reg: must be the I2C address
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Optional properties:
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- interrupt-names: Which interrupt signal is used must be "INTA" or "INTB"
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Defaults to "INTA"
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- quartz-load-capacitance: The internal capacitor to select for the quartz:
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PCF85263_QUARTZCAP_7pF [0]
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PCF85263_QUARTZCAP_6pF [1]
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PCF85263_QUARTZCAP_12p5pF [2] DEFAULT
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- quartz-drive-strength: Drive strength for the quartz:
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PCF85263_QUARTZDRIVE_NORMAL [0] DEFAULT
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PCF85263_QUARTZDRIVE_LOW [1]
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PCF85263_QUARTZDRIVE_HIGH [2]
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- quartz-low-jitter: Boolean property, if present enables low jitter mode
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which
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reduces jitter at the cost of increased power consumption.
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- wakeup-source: mark the chip as a wakeup source, independently of
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the availability of an IRQ line connected to the SoC.
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This is useful if the IRQ line is connected to a PMIC or other circuit
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that can power up the device rather than to a normal SOC interrupt.
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Example:
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rtc@51 {
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compatible = "nxp,pcf85263";
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reg = <0x51>;
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interrupt-parent = <&gpio4>;
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interrupts = <5 IRQ_TYPE_LEVEL_LOW>;
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interrupt-names = "INTB";
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quartz-load-capacitance = <PCF85263_QUARTZCAP_12p5pF>;
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quartz-drive-strength = <PCF85263_QUARTZDRIVE_LOW>;
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};
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