TPS65217PMIC(4) FreeBSD Kernel Interfaces 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):
o LDO1: 1.0V - 3.3V
o LDO2: 0.9V - 3.3V
o LDO3: 1.5V - 3.3V
o LDO4: 1.5V - 3.3V
o DCDC1: 0.9V - 1.8V
o DCDC2: 0.9V - 3.3V
o 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
<
[email protected]>. 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.
FreeBSD 14.1-RELEASE-p8 June 28, 2018 FreeBSD 14.1-RELEASE-p8