mirror of
https://github.com/torvalds/linux.git
synced 2024-11-11 14:42:24 +00:00
a470f11c5b
Add support for the UCD90320 chip and its expanded set of GPIO pins. Signed-off-by: Jim Wright <wrightj@linux.vnet.ibm.com> Link: https://lore.kernel.org/r/20191205232411.21492-3-wrightj@linux.vnet.ibm.com Signed-off-by: Guenter Roeck <linux@roeck-us.net>
138 lines
5.6 KiB
ReStructuredText
138 lines
5.6 KiB
ReStructuredText
Kernel driver ucd9000
|
|
=====================
|
|
|
|
Supported chips:
|
|
|
|
* TI UCD90120, UCD90124, UCD90160, UCD90320, UCD9090, and UCD90910
|
|
|
|
Prefixes: 'ucd90120', 'ucd90124', 'ucd90160', 'ucd90320', 'ucd9090',
|
|
'ucd90910'
|
|
|
|
Addresses scanned: -
|
|
|
|
Datasheets:
|
|
|
|
- http://focus.ti.com/lit/ds/symlink/ucd90120.pdf
|
|
- http://focus.ti.com/lit/ds/symlink/ucd90124.pdf
|
|
- http://focus.ti.com/lit/ds/symlink/ucd90160.pdf
|
|
- http://focus.ti.com/lit/ds/symlink/ucd90320.pdf
|
|
- http://focus.ti.com/lit/ds/symlink/ucd9090.pdf
|
|
- http://focus.ti.com/lit/ds/symlink/ucd90910.pdf
|
|
|
|
Author: Guenter Roeck <linux@roeck-us.net>
|
|
|
|
|
|
Description
|
|
-----------
|
|
|
|
From datasheets:
|
|
|
|
The UCD90120 Power Supply Sequencer and System Health Monitor monitors and
|
|
sequences up to 12 independent voltage rails. The device integrates a 12-bit
|
|
ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage,
|
|
current, or temperature inputs.
|
|
|
|
The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and
|
|
system-health monitor. The device integrates a 12-bit ADC for monitoring up to
|
|
13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins
|
|
can be used for power supply enables, power-on reset signals, external
|
|
interrupts, cascading, or other system functions. Twelve of these pins offer PWM
|
|
functionality. Using these pins, the UCD90124 offers support for fan control,
|
|
margining, and general-purpose PWM functions.
|
|
|
|
The UCD90160 is a 16-rail PMBus/I2C addressable power-supply sequencer and
|
|
monitor. The device integrates a 12-bit ADC for monitoring up to 16 power-supply
|
|
voltage inputs. Twenty-six GPIO pins can be used for power supply enables,
|
|
power-on reset signals, external interrupts, cascading, or other system
|
|
functions. Twelve of these pins offer PWM functionality. Using these pins, the
|
|
UCD90160 offers support for margining, and general-purpose PWM functions.
|
|
|
|
The UCD90320 is a 32-rail PMBus/I2C addressable power-supply sequencer and
|
|
monitor. The 24 integrated ADC channels (AMONx) monitor the power supply
|
|
voltage, current, and temperature. Of the 84 GPIO pins, 8 can be used as
|
|
digital monitors (DMONx), 32 to enable the power supply (ENx), 24 for margining
|
|
(MARx), 16 for logical GPO, and 32 GPIs for cascading, and system function.
|
|
|
|
The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and
|
|
monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply
|
|
voltage inputs. Twenty-three GPIO pins can be used for power supply enables,
|
|
power-on reset signals, external interrupts, cascading, or other system
|
|
functions. Ten of these pins offer PWM functionality. Using these pins, the
|
|
UCD9090 offers support for margining, and general-purpose PWM functions.
|
|
|
|
The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and
|
|
system-health monitor. The device integrates a 12-bit ADC for monitoring up to
|
|
13 power-supply voltage, current, or temperature inputs.
|
|
|
|
This driver is a client driver to the core PMBus driver. Please see
|
|
Documentation/hwmon/pmbus.rst 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.
|
|
|
|
|
|
Platform data support
|
|
---------------------
|
|
|
|
The driver supports standard PMBus driver platform data. Please see
|
|
Documentation/hwmon/pmbus.rst for details.
|
|
|
|
|
|
Sysfs entries
|
|
-------------
|
|
|
|
The following attributes are supported. Limits are read-write; all other
|
|
attributes are read-only.
|
|
|
|
======================= ========================================================
|
|
in[1-12]_label "vout[1-12]".
|
|
in[1-12]_input Measured voltage. From READ_VOUT register.
|
|
in[1-12]_min Minimum Voltage. From VOUT_UV_WARN_LIMIT register.
|
|
in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
|
|
in[1-12]_lcrit Critical minimum Voltage. VOUT_UV_FAULT_LIMIT register.
|
|
in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT
|
|
register.
|
|
in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
|
|
in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
|
|
in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT
|
|
status.
|
|
in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT
|
|
status.
|
|
|
|
curr[1-12]_label "iout[1-12]".
|
|
curr[1-12]_input Measured current. From READ_IOUT register.
|
|
curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
|
|
curr[1-12]_lcrit Critical minimum output current. From
|
|
IOUT_UC_FAULT_LIMIT register.
|
|
curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT
|
|
register.
|
|
curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
|
|
curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
|
|
|
|
For each attribute index, either voltage or current is
|
|
reported, but not both. If voltage or current is
|
|
reported depends on the chip configuration.
|
|
|
|
temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and
|
|
READ_TEMPERATURE_2 registers.
|
|
temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register.
|
|
temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register.
|
|
temp[1-2]_max_alarm Temperature high alarm.
|
|
temp[1-2]_crit_alarm Temperature critical high alarm.
|
|
|
|
fan[1-4]_input Fan RPM.
|
|
fan[1-4]_alarm Fan alarm.
|
|
fan[1-4]_fault Fan fault.
|
|
|
|
Fan attributes are only available on chips supporting
|
|
fan control (UCD90124, UCD90910). Attribute files are
|
|
created only for enabled fans.
|
|
Note that even though UCD90910 supports up to 10 fans,
|
|
only up to four fans are currently supported.
|
|
======================= ========================================================
|