PinePhone Power Management

The data on this page is based on the the PinePhone v1.1 - Braveheart.

Regulators

Current Assignments

Name/GPIO	Output Voltage	Disable at runtime?	Disable in suspend?	Uses (internal/external separated by semicolon)
DCDC1	3.3V	No	Yes (breaks MMC0)	VCC-EFUSE, VCC-IO, VCC-PC (VQMMC2), VCC-PD, VCC-USB; Modem I2C/PCM/UART, Motor, Pogo I2C, UART0, VMMC0, VMMC2, WiFi CHIP_EN
DCDC2	DVFS	No	Yes	VDD-CPUX
DCDC3	DVFS	N/A	N/A	VDD-CPUX (polyphase with DCDC2)
DCDC4	N/A	Yes	Yes	Not used
DCDC5	1.2V	No	Yes (future)	VCC-DRAM; DRAM
DCDC6	1.1V	No	Yes (future)	VDD-SYS
DC1SW	N/A	Yes	Yes	Not used
ALDO1	2.8V	Yes	Yes	VCC-PE; Camera AFVCC, Camera DOVDD, CSI I2C, Pogo I2C
ALDO2	1.8V	No	No	VCC-PL; Pogo INT
ALDO3	3.0V	No	Yes (future)	AVCC, KEYADC, VCC-PLL
DLDO1	3.3V	No (ANX7688 [AVDD33, VCONN_EN Disable Pull-up])	No	HVCC, VCC-DSI; ANX7688 [AVDD33, HDMI_VT, I2C, ANX-V1.0 Enable, VCONN_EN Disable Pull-up], HDMI [DDC, HPD], Proximity LED, Sensor I2C, Sensor VDD
DLDO2	1.8V	Yes	Yes	MIPI-DSI VIO
DLDO3	2.8V	Yes	Yes	Camera AVDD
DLDO4	1.8-3.3V	Yes	Yes	VCC-PG; VQMMC1
ELDO1	1.8V	No	No (DRAM)	CPVDD; DRAM
ELDO2	N/A	Yes	Yes	Not used
ELDO3	1.8V	Yes	Yes	Camera DVDD
FLDO1	1.2V	Yes	Yes	HSIC-VCC (not used)
FLDO2	1.1V	No	No (VDD-CPUS)	VDD-CPUS
GPIO0-LDO	2.8V-3.3V	Yes	Yes	Backlight PWM, LCD, Proximity sensor, Touchscreen [I2C, VCC]
GPIO1-LDO	1.8V	No (ANX7688 DVDD1V8)	No (ANX7688 DVDD1V8)	ANX7688 [AVDD1V8, DVDD1V8, CC, HDMI DDC, I2C, Power/Reset pull-up]
PD6	5.0V	Yes	Yes	USB OTG
PD8	5.0V	Yes	Yes	Pogo supply, USB OTG via PD6
PD9	5.0V	Yes	Yes	VCONN (USB Type C)
PH10	PWM	Yes	Yes	Backlight
PL7	VBAT	Yes	Yes	Modem
ANX-V1.0	1.0V	Yes	Yes	ANX7688 [AVDD1V0, DVDD1V0]

Suggested Hardware Changes

ANX7688

1. Move ANX7688 AVDD33 (the chip input only, not the other things connected to 3v3) and ANX7688 I2C Level Shift (3.3V side) from DLD01 to DCDC1
2. Move ANX7688 DVDD1V8 (the chip input only, not the other things labeled DVDD1V8) from GPIO1-LDO to ALDO2
3. Move ANX7688 ANX-V1.0 Regulator Enable and ANX7688 VCONN_EN Disable Pull-up from DLDO1 to GPIO1-LDO

The result of these changes would be that:

1. The always-on part of the ANX7688 chip will always be powered
2. GPIO1-LDO only needs to be powered when a USB cable is detected, and is enough to power the rest of the chip (except HDMI)
3. DLDO1 only needs to be enabled if the display pipeline or sensors are active, even if a USB cable is plugged in

Open Questions

• How is ANX1.8V actually powered? from GPIO1-LDO or PS or both?

Software Updates Needed

Drivers that Need Regulator Consumers

• LCD Panel for VCC-LCD
• MIPI-DSI/DPHY/Panel for MIPI-DSI VIO
• STK3311-A

Drivers that Need to Suspend Regulators

• STK3311-A
• LIS3MDL
• MPU6050
• Goodix touchscreen
• sunxi pinctrl (maybe)
• USB PHY

GPIO

Open Questions

• What exactly is the modem PWRKEY connected to?