TPS65217PMIC(4)

TPS65217PMIC(4) | Device Drivers Manual | TPS65217PMIC(4)

# NAME

`tps65217pmic` —
Texas Instruments TPS65217 Power Management IC driver

# SYNOPSIS

`tps65217pmic0 at iic? addr 0x24`

# DESCRIPTION

The `tps65217pmic` driver provides minimal support for the TPS65217 chip and allows reporting regulated voltages through the envsys(4) API.

The TPS65217 consists of low-dropout regulators (LDO) and step-down converters with integrated switching FETs (DCDC):

- LDO1: 1.0V - 3.3V
- LDO2: 0.9V - 3.3V
- LDO3: 1.5V - 3.3V
- LDO4: 1.5V - 3.3V
- DCDC1: 0.9V - 1.8V
- DCDC2: 0.9V - 3.3V
- DCDC1: 0.9V - 1.5V

# SEE ALSO

envsys(4)

# HISTORY

The `tps65217pmic` device first appeared in NetBSD 7.0.

# AUTHORS

The `tps65217pmic` driver was written by Radoslaw Kujawa <radoslaw.kujawa@gmail.com>. Voltage change callback for AM335x was added by Manuel Bouyer. White LED (backlight) support was added by KIYOHARA Takashi.

# CAVEATS

The driver can only report current voltage regulator settings. It can not measure the real voltage, as the TPS65217 chip lacks hardware to do that. Some boards allow voltage measurement by connecting the power output to external sensor, or analog input of the MPU, but this is outside of the scope of this driver.

Modifying voltage regulator parameters from user space was deliberately left unimplemented, as these parameters should only be set at the firmware or kernel level. Setting wrong parameters may result in permanent hardware damage.

The `tps65217pmic` driver offers a function that can be used to change the voltage from other kernel components (currently used by AM335x support code).

# BUGS

Battery and interrupt support is not implemented.

June 28, 2018 | NetBSD 9.3