Kernel driver zl6100¶
Supported chips:
Intersil / Zilker Labs ZL2004
Prefix: ‘zl2004’
Addresses scanned: -
Intersil / Zilker Labs ZL2005
Prefix: ‘zl2005’
Addresses scanned: -
Intersil / Zilker Labs ZL2006
Prefix: ‘zl2006’
Addresses scanned: -
Intersil / Zilker Labs ZL2008
Prefix: ‘zl2008’
Addresses scanned: -
Intersil / Zilker Labs ZL2105
Prefix: ‘zl2105’
Addresses scanned: -
Intersil / Zilker Labs ZL2106
Prefix: ‘zl2106’
Addresses scanned: -
Intersil / Zilker Labs ZL6100
Prefix: ‘zl6100’
Addresses scanned: -
Intersil / Zilker Labs ZL6105
Prefix: ‘zl6105’
Addresses scanned: -
Intersil / Zilker Labs ZL9101M
Prefix: ‘zl9101’
Addresses scanned: -
Intersil / Zilker Labs ZL9117M
Prefix: ‘zl9117’
Addresses scanned: -
Ericsson BMR450, BMR451
Prefix: ‘bmr450’, ‘bmr451’
Addresses scanned: -
Datasheet:
http://archive.ericsson.net/service/internet/picov/get?DocNo=28701-EN/LZT146401
Ericsson BMR462, BMR463, BMR464
Prefixes: ‘bmr462’, ‘bmr463’, ‘bmr464’
Addresses scanned: -
Datasheet:
Author: Guenter Roeck <linux@roeck-us.net>
Description¶
This driver supports hardware monitoring for Intersil / Zilker Labs ZL6100 andcompatible digital DC-DC controllers.
The driver is a client driver to the core PMBus driver. Please seeDocumentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for detailson PMBus client drivers.
Usage Notes¶
This driver does not auto-detect devices. You will have to instantiate thedevices explicitly. Please see Documentation/i2c/instantiating-devices.rst fordetails.
Warning
Do not access chip registers using the i2cdump command, and do not useany of the i2ctools commands on a command register used to save and restoreconfiguration data (0x11, 0x12, 0x15, 0x16, and 0xf4). The chips supported bythis driver interpret any access to those command registers (including readcommands) as request to execute the command in question. Unless write accessesto those registers are protected, this may result in power loss, board resets,and/or Flash corruption. Worst case, your board may turn into a brick.
Platform data support¶
The driver supports standard PMBus driver platform data.
Module parameters¶
delay¶
Intersil/Zilker Labs DC-DC controllers require a minimum interval between I2Cbus accesses. According to Intersil, the minimum interval is 2 ms, though 1 msappears to be sufficient and has not caused any problems in testing. The problemis known to affect all currently supported chips. For manual override, thedriver provides a writeable module parameter, ‘delay’, which can be used to setthe interval to a value between 0 and 65,535 microseconds.
Sysfs entries¶
The following attributes are supported. Limits are read-write; all otherattributes are read-only.
| in1_label | “vin” |
| in1_input | Measured input voltage. |
| in1_min | Minimum input voltage. |
| in1_max | Maximum input voltage. |
| in1_lcrit | Critical minimum input voltage. |
| in1_crit | Critical maximum input voltage. |
| in1_min_alarm | Input voltage low alarm. |
| in1_max_alarm | Input voltage high alarm. |
| in1_lcrit_alarm | Input voltage critical low alarm. |
| in1_crit_alarm | Input voltage critical high alarm. |
| in2_label | “vmon” |
| in2_input | Measured voltage on VMON (ZL2004) or VDRV (ZL9101M,ZL9117M) pin. Reported voltage is 16x the voltage on thepin (adjusted internally by the chip). |
| in2_lcrit | Critical minimum VMON/VDRV Voltage. |
| in2_crit | Critical maximum VMON/VDRV voltage. |
| in2_lcrit_alarm | VMON/VDRV voltage critical low alarm. |
| in2_crit_alarm | VMON/VDRV voltage critical high alarm. vmon attributes are supported on ZL2004, ZL9101M,and ZL9117M only. |
| inX_label | “vout1” |
| inX_input | Measured output voltage. |
| inX_lcrit | Critical minimum output Voltage. |
| inX_crit | Critical maximum output voltage. |
| inX_lcrit_alarm | Critical output voltage critical low alarm. |
| inX_crit_alarm | Critical output voltage critical high alarm. X is 3 for ZL2004, ZL9101M, and ZL9117M, 2 otherwise. |
| curr1_label | “iout1” |
| curr1_input | Measured output current. |
| curr1_lcrit | Critical minimum output current. |
| curr1_crit | Critical maximum output current. |
| curr1_lcrit_alarm | Output current critical low alarm. |
| curr1_crit_alarm | Output current critical high alarm. |
| temp[12]_input | Measured temperature. |
| temp[12]_min | Minimum temperature. |
| temp[12]_max | Maximum temperature. |
| temp[12]_lcrit | Critical low temperature. |
| temp[12]_crit | Critical high temperature. |
| temp[12]_min_alarm | Chip temperature low alarm. |
| temp[12]_max_alarm | Chip temperature high alarm. |
| temp[12]_lcrit_alarm | Chip temperature critical low alarm. |
| temp[12]_crit_alarm | Chip temperature critical high alarm. |