From: pascal paillet <[email protected]> stpmu1 is a pmic from STMicroelectronics. The stpmu1 integrates 10 regulators and 3 switches with various capabilities.
Signed-off-by: pascal paillet <[email protected]> --- .../devicetree/bindings/mfd/st,stpmu1.txt | 138 +++++++++++++++++++++ 1 file changed, 138 insertions(+) create mode 100644 Documentation/devicetree/bindings/mfd/st,stpmu1.txt diff --git a/Documentation/devicetree/bindings/mfd/st,stpmu1.txt b/Documentation/devicetree/bindings/mfd/st,stpmu1.txt new file mode 100644 index 0000000..53bdab4 --- /dev/null +++ b/Documentation/devicetree/bindings/mfd/st,stpmu1.txt @@ -0,0 +1,138 @@ +* STMicroelectronics STPMU1 Power Management IC + +Required parent device properties: +- compatible: "st,stpmu1" +- reg: the I2C slave address for the stpmu1 chip +- interrupts-extended: interrupt lines to use: second irq is for wakeup. +- #interrupt-cells: should be 2. +- interrupt-controller: describes the STPMU1 as an interrupt + controller (has its own domain). interrupt number are the following: + /* Interrupt Register 1 (0x50 for latch) */ + IT_SWOUT_R=0 + IT_SWOUT_F=1 + IT_VBUS_OTG_R=2 + IT_VBUS_OTG_F=3 + IT_WAKEUP_R=4 + IT_WAKEUP_F=5 + IT_PONKEY_R=6 + IT_PONKEY_F=7 + /* Interrupt Register 2 (0x51 for latch) */ + IT_OVP_BOOST=8 + IT_OCP_BOOST=9 + IT_OCP_SWOUT=10 + IT_OCP_OTG=11 + IT_CURLIM_BUCK4=12 + IT_CURLIM_BUCK3=13 + IT_CURLIM_BUCK2=14 + IT_CURLIM_BUCK1=15 + /* Interrupt Register 3 (0x52 for latch) */ + IT_SHORT_SWOUT=16 + IT_SHORT_SWOTG=17 + IT_CURLIM_LDO6=18 + IT_CURLIM_LDO5=19 + IT_CURLIM_LDO4=20 + IT_CURLIM_LDO3=21 + IT_CURLIM_LDO2=22 + IT_CURLIM_LDO1=23 + /* Interrupt Register 3 (0x52 for latch) */ + IT_SWIN_R=24 + IT_SWIN_F=25 + IT_RESERVED_1=26 + IT_RESERVED_2=27 + IT_VINLOW_R=28 + IT_VINLOW_F=29 + IT_TWARN_R=30 + IT_TWARN_F=31 + +Optional parent device properties: +- st,main_control_register: + -bit 1: Power cycling will be performed on turn OFF condition + -bit 2: PWRCTRL is functional + -bit 3: PWRCTRL active high +- st,pads_pull_register: + -bit 1: WAKEUP pull down is not active + -bit 2: PWRCTRL pull up is active + -bit 3: PWRCTRL pull down is active + -bit 4: WAKEUP detector is disabled +- st,vin_control_register: + -bit 0: VINLOW monitoring is enabled + -bit [1...3]: VINLOW rising threshold + 000 VINOK_f + 50mV + 001 VINOK_f + 100mV + 010 VINOK_f + 150mV + 011 VINOK_f + 200mV + 100 VINOK_f + 250mV + 101 VINOK_f + 300mV + 110 VINOK_f + 350mV + 111 VINOK_f + 400mV + -bit [4...5]: VINLOW hyst + 00 100mV + 01 200mV + 10 300mV + 11 400mV + -bit 6: SW_OUT detector is disabled + -bit 7: SW_IN detector is enabled. +- st,usb_control_register: + -bit 3: SW_OUT current limit + 0: 600mA + 1: 1.1A + -bit 4: VBUS_OTG discharge is enabled + -bit 5: SW_OUT discharge is enabled + -bit 6: VBUS_OTG detection is enabled + -bit 7: BOOST_OVP is disabled + + +stpmu1 consists is a varied group of sub-devices: + +Device Description +------ ------------ +stpmu1-onkey : On key +stpmu1-regulators : Regulators +stpmu1-wdt : Watchdog + +each sub-device bindings is be described in associated driver +documentation section. + +Example: + +pmic: stpmu1@33 { + compatible = "st,stpmu1"; + reg = <0x33>; + interrupts = <0 2>; + interrupts-extended = <&intc GIC_SPI 149 IRQ_TYPE_NONE>, + <&exti 55 1>; + st,version_status = <0x10>; + st,main_control_register=<0x0c>; + interrupt-controller; + #interrupt-cells = <2>; + onkey { + compatible = "st,stpmu1-onkey"; + interrupt-parent = <&pmic>; + interrupts = <7 0>,<6 1>; + st,onkey-pwroff-enabled; + st,onkey-press-seconds = <10>; + }; + + watchdog { + compatible = "st,stpmu1-wdt"; + }; + + regulators { + compatible = "st,stpmu1-regulators"; + + vdd_core: regulator@0 { + regulator-compatible = "buck1"; + regulator-name = "vdd_core"; + regulator-boot-on; + regulator-min-microvolt = <700000>; + regulator-max-microvolt = <1200000>; + }; + vdd: regulator@1 { + regulator-compatible = "buck3"; + regulator-name = "vdd"; + regulator-min-microvolt = <3300000>; + regulator-max-microvolt = <3300000>; + regulator-boot-on; + regulator-pull-down; + }; + }; -- 1.9.1
