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6e954d2e64
Update documentation for zl6100 driver and fix dead links to technical specifications Signed-off-by: Erik Rosen <erik.rosen@metormote.com> Link: https://lore.kernel.org/r/20210423153329.33457-3-erik.rosen@metormote.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
260 lines
6.8 KiB
ReStructuredText
260 lines
6.8 KiB
ReStructuredText
Kernel driver zl6100
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====================
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Supported chips:
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* Renesas / Intersil / Zilker Labs ZL2004
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Prefix: 'zl2004'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl2004-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL2005
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Prefix: 'zl2005'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl2005-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL2006
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Prefix: 'zl2006'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl2006-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL2008
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Prefix: 'zl2008'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl2008-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL2105
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Prefix: 'zl2105'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl2105-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL2106
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Prefix: 'zl2106'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl2106-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL6100
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Prefix: 'zl6100'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl6100-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL6105
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Prefix: 'zl6105'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl6105-datasheet.pdf
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* Renesas / Intersil / Zilker Labs ZL8802
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Prefix: 'zl8802'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl8802-datasheet
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* Renesas / Intersil / Zilker Labs ZL9101M
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Prefix: 'zl9101'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl9101m-datasheet
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* Renesas / Intersil / Zilker Labs ZL9117M
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Prefix: 'zl9117'
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Addresses scanned: -
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Datasheet: https://www.renesas.com/us/en/document/dst/zl9117m-datasheet
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* Renesas / Intersil / Zilker Labs ZLS1003, ZLS4009
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Prefix: 'zls1003', zls4009
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Addresses scanned: -
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Datasheet: Not published
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* Flex BMR450, BMR451
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Prefix: 'bmr450', 'bmr451'
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Addresses scanned: -
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Datasheet:
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https://flexpowermodules.com/resources/fpm-techspec-bmr450-digital-pol-regulators-20a
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* Flex BMR462, BMR463, BMR464
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Prefixes: 'bmr462', 'bmr463', 'bmr464'
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Addresses scanned: -
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Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr462
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* Flex BMR465, BMR467
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Prefixes: 'bmr465', 'bmr467'
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Addresses scanned: -
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Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr465-digital-pol
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* Flex BMR466
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Prefixes: 'bmr466'
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Addresses scanned: -
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Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr466-8x12
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* Flex BMR469
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Prefixes: 'bmr469'
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Addresses scanned: -
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Datasheet: https://flexpowermodules.com/resources/fpm-techspec-bmr4696001
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Author: Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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This driver supports hardware monitoring for Renesas / Intersil / Zilker Labs
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ZL6100 and compatible digital DC-DC controllers.
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The driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus.rst and Documentation.hwmon/pmbus-core for details
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on PMBus client drivers.
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Usage Notes
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-----------
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This driver does not auto-detect devices. You will have to instantiate the
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devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
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details.
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.. warning::
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Do not access chip registers using the i2cdump command, and do not use
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any of the i2ctools commands on a command register used to save and restore
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configuration data (0x11, 0x12, 0x15, 0x16, and 0xf4). The chips supported by
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this driver interpret any access to those command registers (including read
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commands) as request to execute the command in question. Unless write accesses
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to those registers are protected, this may result in power loss, board resets,
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and/or Flash corruption. Worst case, your board may turn into a brick.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data.
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Module parameters
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-----------------
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delay
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-----
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Renesas/Intersil/Zilker Labs DC-DC controllers require a minimum interval
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between I2C bus accesses. According to Intersil, the minimum interval is 2 ms,
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though 1 ms appears to be sufficient and has not caused any problems in testing.
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The problem is known to affect all currently supported chips. For manual override,
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the driver provides a writeable module parameter, 'delay', which can be used
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to set the interval to a value between 0 and 65,535 microseconds.
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Sysfs entries
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-------------
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The following attributes are supported. Limits are read-write; all other
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attributes are read-only.
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======================= ========================================================
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in1_label "vin"
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in1_input Measured input voltage.
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in1_min Minimum input voltage.
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in1_max Maximum input voltage.
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in1_lcrit Critical minimum input voltage.
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in1_crit Critical maximum input voltage.
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in1_min_alarm Input voltage low alarm.
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in1_max_alarm Input voltage high alarm.
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in1_lcrit_alarm Input voltage critical low alarm.
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in1_crit_alarm Input voltage critical high alarm.
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in2_label "vmon"
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in2_input Measured voltage on VMON (ZL2004) or VDRV (ZL9101M,
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ZL9117M) pin. Reported voltage is 16x the voltage on the
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pin (adjusted internally by the chip).
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in2_lcrit Critical minimum VMON/VDRV Voltage.
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in2_crit Critical maximum VMON/VDRV voltage.
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in2_lcrit_alarm VMON/VDRV voltage critical low alarm.
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in2_crit_alarm VMON/VDRV voltage critical high alarm.
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vmon attributes are supported on ZL2004, ZL8802,
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ZL9101M, ZL9117M and ZLS4009 only.
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inX_label "vout[12]"
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inX_input Measured output voltage.
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inX_lcrit Critical minimum output Voltage.
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inX_crit Critical maximum output voltage.
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inX_lcrit_alarm Critical output voltage critical low alarm.
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inX_crit_alarm Critical output voltage critical high alarm.
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X is 3 for ZL2004, ZL9101M, and ZL9117M,
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3, 4 for ZL8802 and 2 otherwise.
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curr1_label "iin"
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curr1_input Measured input current.
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iin attributes are supported on ZL8802 only
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currY_label "iout[12]"
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currY_input Measured output current.
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currY_lcrit Critical minimum output current.
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currY_crit Critical maximum output current.
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currY_lcrit_alarm Output current critical low alarm.
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currY_crit_alarm Output current critical high alarm.
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Y is 2, 3 for ZL8802, 1 otherwise
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temp[12]_input Measured temperature.
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temp[12]_min Minimum temperature.
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temp[12]_max Maximum temperature.
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temp[12]_lcrit Critical low temperature.
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temp[12]_crit Critical high temperature.
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temp[12]_min_alarm Chip temperature low alarm.
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temp[12]_max_alarm Chip temperature high alarm.
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temp[12]_lcrit_alarm Chip temperature critical low alarm.
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temp[12]_crit_alarm Chip temperature critical high alarm.
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======================= ========================================================
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