58 lines
1.6 KiB
Plaintext
58 lines
1.6 KiB
Plaintext
STMicroelectronics STM32MP1 Power Management Controller
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=======================================================
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The PWR IP is responsible for handling the power related resources such as
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clocks, power supplies and resets. It provides 6 wake-up pins that are handled
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by an interrupt-controller. Wake-up pin can be used to wake-up from STANDBY SoC state.
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Required properties:
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- compatible should be: "st,stm32mp1-pwr"
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- reg: should be register base and length as documented in the
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datasheet
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- interrupts: contains the reference to the gic wake-up pin interrupt
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- interrupt-controller; Enable interrupt controller for wake-up pins.
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- #interrupt-cells = <3>
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- wakeup-gpios: contains a list of GPIO spec describing each wake-up pin.
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Optional Properties:
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- pwr-supply: main soc power supply
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Interrupt consumers have to specify 3 cells:
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- cell 1: wake-up pin id from 0 to 5
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- cell 2: IRQ_TYPE_EDGE_FALLING or IRQ_TYPE_EDGE_RISING
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- cell 3: Pull config: 0 = No Pull, 1=Pull Up, 2=Pull Down
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Example:
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pwr: pwr@50001000 {
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compatible = "st,stm32mp1-pwr", "simple-mfd";
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reg = <0x50001000 0x400>;
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interrupts = <GIC_SPI 149 IRQ_TYPE_NONE>;
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interrupt-controller;
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#interrupt-cells = <3>;
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wakeup-gpios = <&gpioa 0 0>, <&gpioa 2 0>,
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<&gpioc 13 0>, <&gpioi 8 0>,
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<&gpioi 11 0>, <&gpioc 1 0>;
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pwr-supply = <&vdd>;
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};
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Example of interrupt user:
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gpio_keys {
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compatible = "gpio-keys";
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#address-cells = <1>;
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#size-cells = <0>;
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button@4 {
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label = "WakeUp4";
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linux,code = <BTN_4>;
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interrupt-parent = <&pwr>;
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interrupts = <3 IRQ_TYPE_EDGE_FALLING 1>;
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wakeup-source;
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};
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};
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