This man page only documents the hardware\-specific features of the \fBasem\fR driver\&. For information about the core driver, see \fBnutupsdrv\fR(8)\&.
.SH"SUPPORTED HARDWARE"
.sp
The \fBasem\fR driver supports the UPS in ASEM PB1300 embedded PCs\&. Likely other I2C devices from the same manufacturer will work too, since this is a "custom" charger\&.
.sp
Seems that there are two versions of the charger\&. Older one is based on Max1667, newer one is a custom solution\&. Both are on I2C address 0x09\&. To be compatible with both versions, the driver just reads bit 15 of address 0x13 which yields online/on battery status\&. Battery monitor is a BQ2060 at address 0x0B\&.
.SH"EXTRA ARGUMENTS"
.sp
The required parameter for this driver is the I2C bus name:
.PP
\fBport\fR=\fIdev\-node\fR
.RS4
On the Asem PB1300, this should be
/dev/i2c\-7
for the i801 SMBUS adapter\&.
.RE
.sp
This driver also supports the following optional settings:
.PP
\fBlb\fR=\fInum\fR
.RS4
Set the low battery threshold to
\fInum\fR
volts\&.
.RE
.PP
\fBhb\fR=\fInum\fR
.RS4
Set the high battery threshold to
\fInum\fR
volts\&.
.RE
.SH"INSTALLATION"
.sp
This driver is specific to the Linux I2C API, and requires the lm_sensors libi2c\-dev or its equivalent to compile\&.
.sp
Beware that the SystemIO memory used by the I2C controller is reserved by ACPI\&. If only a native I2C driver (e\&.g\&. i2c_i801, as of 3\&.5\&.X Linux kernels) is available, then you\(cqll need to relax the ACPI resources check\&. For example, you can boot with the acpi_enforce_resources=lax option\&.
.SH"KNOWN ISSUES AND BUGS"
.sp
The driver shutdown function is not implemented, so other arrangements must be made to turn off the UPS\&.
