Kernel driver zl6100
====================
Supported chips:
* Renesas / Intersil / Zilker Labs ZL2004
Prefix: 'zl2004'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl2004-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL2005
Prefix: 'zl2005'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl2005-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL2006
Prefix: 'zl2006'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl2006-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL2008
Prefix: 'zl2008'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl2008-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL2105
Prefix: 'zl2105'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl2105-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL2106
Prefix: 'zl2106'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl2106-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL6100
Prefix: 'zl6100'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl6100-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL6105
Prefix: 'zl6105'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl6105-datasheet.pdf
* Renesas / Intersil / Zilker Labs ZL8802
Prefix: 'zl8802'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl8802-datasheet
* Renesas / Intersil / Zilker Labs ZL9101M
Prefix: 'zl9101'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl9101m-datasheet
* Renesas / Intersil / Zilker Labs ZL9117M
Prefix: 'zl9117'
Addresses scanned: -
Datasheet: https://www.renesas.com/us/en/document/dst/zl9117m-datasheet
* Renesas / Intersil / Zilker Labs ZLS1003, ZLS4009
Prefix: 'zls1003', zls4009
Addresses scanned: -
Datasheet: Not published
* Flex BMR450, BMR451
Prefix: 'bmr450', 'bmr451'
Addresses scanned: -
Datasheet:
https://flexpowermodules.com/resources/fpm-techspec-bmr450-digital-pol-regulators-20a
* Flex BMR462, BMR463, BMR464
Prefixes: 'bmr462', 'bmr463', 'bmr464'
Addresses scanned: -
Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr462
* Flex BMR465, BMR467
Prefixes: 'bmr465', 'bmr467'
Addresses scanned: -
Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr465-digital-pol
* Flex BMR466
Prefixes: 'bmr466'
Addresses scanned: -
Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr466-8x12
* Flex BMR469
Prefixes: 'bmr469'
Addresses scanned: -
Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr4696001
Author: Guenter Roeck <linux@roeck-us.net>
Description
-----------
This driver supports hardware monitoring for Renesas / Intersil / Zilker Labs
ZL6100 and compatible digital DC-DC controllers.
The driver is a client driver to the core PMBus driver. Please see
Documentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for details
on PMBus client drivers.
Usage Notes
-----------
This driver does not auto-detect devices. You will have to instantiate the
devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
details.
.. warning::
Do not access chip registers using the i2cdump command, and do not use
any of the i2ctools commands on a command register used to save and restore
configuration data (0x11, 0x12, 0x15, 0x16, and 0xf4). The chips supported by
this driver interpret any access to those command registers (including read
commands) as request to execute the command in question. Unless write accesses
to 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
-----
Renesas/Intersil/Zilker Labs DC-DC controllers require a minimum interval
between I2C bus accesses. According to Intersil, the minimum interval is 2 ms,
though 1 ms appears to be sufficient and has not caused any problems in testing.
The problem is known to affect all currently supported chips. For manual override,
the driver provides a writeable module parameter, 'delay', which can be used
to set the interval to a value between 0 and 65,535 microseconds.
Sysfs entries
-------------
The following attributes are supported. Limits are read-write; all other
attributes 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 the
pin (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, ZL8802,
ZL9101M, ZL9117M and ZLS4009 only.
inX_label "vout[12]"
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,
3, 4 for ZL8802 and 2 otherwise.
curr1_label "iin"
curr1_input Measured input current.
iin attributes are supported on ZL8802 only
currY_label "iout[12]"
currY_input Measured output current.
currY_lcrit Critical minimum output current.
currY_crit Critical maximum output current.
currY_lcrit_alarm Output current critical low alarm.
currY_crit_alarm Output current critical high alarm.
Y is 2, 3 for ZL8802, 1 otherwise
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.
======================= ========================================================