hwmon: (pmbus) Support for TI UCD90xxx series Sequencer and System Health Controllers
Hardware monitoring support for TI UCD90120, UCD90124, UCD9090, and UCD90910 Sequencer and System Health Controllers. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
This commit is contained in:
Guenter Roeck
parent
84fc4585c1
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0c0a061516
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Kernel driver ucd9000
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=====================
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Supported chips:
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* TI UCD90120, UCD90124, UCD9090, and UCD90910
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Prefixes: 'ucd90120', 'ucd90124', 'ucd9090', 'ucd90910'
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Addresses scanned: -
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Datasheets:
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http://focus.ti.com/lit/ds/symlink/ucd90120.pdf
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http://focus.ti.com/lit/ds/symlink/ucd90124.pdf
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http://focus.ti.com/lit/ds/symlink/ucd9090.pdf
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http://focus.ti.com/lit/ds/symlink/ucd90910.pdf
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Author: Guenter Roeck <guenter.roeck@ericsson.com>
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Description
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-----------
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From datasheets:
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The UCD90120 Power Supply Sequencer and System Health Monitor monitors and
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sequences up to 12 independent voltage rails. The device integrates a 12-bit
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ADC with a 2.5V internal reference for monitoring up to 13 power supply voltage,
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current, or temperature inputs.
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The UCD90124 is a 12-rail PMBus/I2C addressable power-supply sequencer and
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system-health monitor. The device integrates a 12-bit ADC for monitoring up to
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13 power-supply voltage, current, or temperature inputs. Twenty-six GPIO pins
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can be used for power supply enables, power-on reset signals, external
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interrupts, cascading, or other system functions. Twelve of these pins offer PWM
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functionality. Using these pins, the UCD90124 offers support for fan control,
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margining, and general-purpose PWM functions.
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The UCD9090 is a 10-rail PMBus/I2C addressable power-supply sequencer and
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monitor. The device integrates a 12-bit ADC for monitoring up to 10 power-supply
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voltage inputs. Twenty-three GPIO pins can be used for power supply enables,
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power-on reset signals, external interrupts, cascading, or other system
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functions. Ten of these pins offer PWM functionality. Using these pins, the
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UCD9090 offers support for margining, and general-purpose PWM functions.
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The UCD90910 is a ten-rail I2C / PMBus addressable power-supply sequencer and
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system-health monitor. The device integrates a 12-bit ADC for monitoring up to
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13 power-supply voltage, current, or temperature inputs.
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This driver is a client driver to the core PMBus driver. Please see
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Documentation/hwmon/pmbus for details 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 for
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details.
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Platform data support
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---------------------
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The driver supports standard PMBus driver platform data. Please see
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Documentation/hwmon/pmbus for details.
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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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in[1-12]_label "vout[1-12]".
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in[1-12]_input Measured voltage. From READ_VOUT register.
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in[1-12]_min Minumum Voltage. From VOUT_UV_WARN_LIMIT register.
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in[1-12]_max Maximum voltage. From VOUT_OV_WARN_LIMIT register.
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in[1-12]_lcrit Critical minumum Voltage. VOUT_UV_FAULT_LIMIT register.
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in[1-12]_crit Critical maximum voltage. From VOUT_OV_FAULT_LIMIT register.
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in[1-12]_min_alarm Voltage low alarm. From VOLTAGE_UV_WARNING status.
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in[1-12]_max_alarm Voltage high alarm. From VOLTAGE_OV_WARNING status.
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in[1-12]_lcrit_alarm Voltage critical low alarm. From VOLTAGE_UV_FAULT status.
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in[1-12]_crit_alarm Voltage critical high alarm. From VOLTAGE_OV_FAULT status.
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curr[1-12]_label "iout[1-12]".
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curr[1-12]_input Measured current. From READ_IOUT register.
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curr[1-12]_max Maximum current. From IOUT_OC_WARN_LIMIT register.
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curr[1-12]_lcrit Critical minumum output current. From IOUT_UC_FAULT_LIMIT
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register.
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curr[1-12]_crit Critical maximum current. From IOUT_OC_FAULT_LIMIT register.
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curr[1-12]_max_alarm Current high alarm. From IOUT_OC_WARNING status.
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curr[1-12]_crit_alarm Current critical high alarm. From IOUT_OC_FAULT status.
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For each attribute index, either voltage or current is
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reported, but not both. If voltage or current is
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reported depends on the chip configuration.
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temp[1-2]_input Measured temperatures. From READ_TEMPERATURE_1 and
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READ_TEMPERATURE_2 registers.
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temp[1-2]_max Maximum temperature. From OT_WARN_LIMIT register.
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temp[1-2]_crit Critical high temperature. From OT_FAULT_LIMIT register.
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temp[1-2]_max_alarm Temperature high alarm.
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temp[1-2]_crit_alarm Temperature critical high alarm.
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fan[1-4]_input Fan RPM.
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fan[1-4]_alarm Fan alarm.
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fan[1-4]_fault Fan fault.
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Fan attributes are only available on chips supporting
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fan control (UCD90124, UCD90910). Attribute files are
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created only for enabled fans.
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Note that even though UCD90910 supports up to 10 fans,
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only up to four fans are currently supported.
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@ -857,12 +857,24 @@ config SENSORS_MAX8688
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This driver can also be built as a module. If so, the module will
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be called max8688.
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config SENSORS_UCD9000
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tristate "TI UCD90120, UCD90124, UCD9090, UCD90910"
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default n
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help
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If you say yes here you get hardware monitoring support for TI
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UCD90120, UCD90124, UCD9090, UCD90910 Sequencer and System Health
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Controllers.
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This driver can also be built as a module. If so, the module will
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be called ucd9000.
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config SENSORS_UCD9200
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tristate "TI UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, UCD9248"
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default n
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help
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If you say yes here you get hardware monitoring support for TI
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UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248.
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UCD9220, UCD9222, UCD9224, UCD9240, UCD9244, UCD9246, and UCD9248
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Digital PWM System Controllers.
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This driver can also be built as a module. If so, the module will
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be called ucd9200.
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@ -123,6 +123,7 @@ obj-$(CONFIG_SENSORS_PMBUS) += pmbus.o
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obj-$(CONFIG_SENSORS_MAX16064) += max16064.o
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obj-$(CONFIG_SENSORS_MAX34440) += max34440.o
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obj-$(CONFIG_SENSORS_MAX8688) += max8688.o
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obj-$(CONFIG_SENSORS_UCD9000) += ucd9000.o
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obj-$(CONFIG_SENSORS_UCD9200) += ucd9200.o
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ccflags-$(CONFIG_HWMON_DEBUG_CHIP) := -DDEBUG
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@ -0,0 +1,278 @@
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/*
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* Hardware monitoring driver for UCD90xxx Sequencer and System Health
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* Controller series
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*
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* Copyright (C) 2011 Ericsson AB.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/slab.h>
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#include <linux/i2c.h>
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#include <linux/i2c/pmbus.h>
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#include "pmbus.h"
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enum chips { ucd9000, ucd90120, ucd90124, ucd9090, ucd90910 };
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#define UCD9000_MONITOR_CONFIG 0xd5
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#define UCD9000_NUM_PAGES 0xd6
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#define UCD9000_FAN_CONFIG_INDEX 0xe7
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#define UCD9000_FAN_CONFIG 0xe8
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#define UCD9000_DEVICE_ID 0xfd
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#define UCD9000_MON_TYPE(x) (((x) >> 5) & 0x07)
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#define UCD9000_MON_PAGE(x) ((x) & 0x0f)
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#define UCD9000_MON_VOLTAGE 1
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#define UCD9000_MON_TEMPERATURE 2
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#define UCD9000_MON_CURRENT 3
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#define UCD9000_MON_VOLTAGE_HW 4
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#define UCD9000_NUM_FAN 4
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struct ucd9000_data {
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u8 fan_data[UCD9000_NUM_FAN][I2C_SMBUS_BLOCK_MAX];
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struct pmbus_driver_info info;
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};
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#define to_ucd9000_data(_info) container_of(_info, struct ucd9000_data, info)
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static int ucd9000_get_fan_config(struct i2c_client *client, int fan)
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{
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int fan_config = 0;
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struct ucd9000_data *data
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= to_ucd9000_data(pmbus_get_driver_info(client));
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if (data->fan_data[fan][3] & 1)
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fan_config |= PB_FAN_2_INSTALLED; /* Use lower bit position */
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/* Pulses/revolution */
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fan_config |= (data->fan_data[fan][3] & 0x06) >> 1;
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return fan_config;
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}
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static int ucd9000_read_byte_data(struct i2c_client *client, int page, int reg)
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{
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int ret = 0;
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int fan_config;
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switch (reg) {
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case PMBUS_FAN_CONFIG_12:
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if (page)
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return -EINVAL;
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ret = ucd9000_get_fan_config(client, 0);
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if (ret < 0)
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return ret;
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fan_config = ret << 4;
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ret = ucd9000_get_fan_config(client, 1);
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if (ret < 0)
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return ret;
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fan_config |= ret;
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ret = fan_config;
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break;
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case PMBUS_FAN_CONFIG_34:
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if (page)
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return -EINVAL;
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ret = ucd9000_get_fan_config(client, 2);
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if (ret < 0)
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return ret;
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fan_config = ret << 4;
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ret = ucd9000_get_fan_config(client, 3);
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if (ret < 0)
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return ret;
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fan_config |= ret;
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ret = fan_config;
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break;
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default:
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ret = -ENODATA;
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break;
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}
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return ret;
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}
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static const struct i2c_device_id ucd9000_id[] = {
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{"ucd9000", ucd9000},
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{"ucd90120", ucd90120},
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{"ucd90124", ucd90124},
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{"ucd9090", ucd9090},
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{"ucd90910", ucd90910},
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{}
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};
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MODULE_DEVICE_TABLE(i2c, ucd9000_id);
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static int ucd9000_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
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struct ucd9000_data *data;
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struct pmbus_driver_info *info;
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const struct i2c_device_id *mid;
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int i, ret;
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if (!i2c_check_functionality(client->adapter,
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I2C_FUNC_SMBUS_BYTE_DATA |
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I2C_FUNC_SMBUS_BLOCK_DATA))
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return -ENODEV;
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ret = i2c_smbus_read_block_data(client, UCD9000_DEVICE_ID,
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block_buffer);
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if (ret < 0) {
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dev_err(&client->dev, "Failed to read device ID\n");
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return ret;
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}
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block_buffer[ret] = '\0';
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dev_info(&client->dev, "Device ID %s\n", block_buffer);
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mid = NULL;
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for (i = 0; i < ARRAY_SIZE(ucd9000_id); i++) {
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mid = &ucd9000_id[i];
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if (!strncasecmp(mid->name, block_buffer, strlen(mid->name)))
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break;
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}
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if (!mid || !strlen(mid->name)) {
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dev_err(&client->dev, "Unsupported device\n");
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return -ENODEV;
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}
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if (id->driver_data != ucd9000 && id->driver_data != mid->driver_data)
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dev_notice(&client->dev,
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"Device mismatch: Configured %s, detected %s\n",
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id->name, mid->name);
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data = kzalloc(sizeof(struct ucd9000_data), GFP_KERNEL);
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if (!data)
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return -ENOMEM;
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info = &data->info;
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ret = i2c_smbus_read_byte_data(client, UCD9000_NUM_PAGES);
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if (ret < 0) {
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dev_err(&client->dev,
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"Failed to read number of active pages\n");
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goto out;
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}
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info->pages = ret;
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if (!info->pages) {
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dev_err(&client->dev, "No pages configured\n");
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ret = -ENODEV;
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goto out;
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}
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/* The internal temperature sensor is always active */
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info->func[0] = PMBUS_HAVE_TEMP;
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/* Everything else is configurable */
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ret = i2c_smbus_read_block_data(client, UCD9000_MONITOR_CONFIG,
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block_buffer);
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if (ret <= 0) {
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dev_err(&client->dev, "Failed to read configuration data\n");
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ret = -ENODEV;
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goto out;
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}
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for (i = 0; i < ret; i++) {
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int page = UCD9000_MON_PAGE(block_buffer[i]);
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if (page >= info->pages)
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continue;
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switch (UCD9000_MON_TYPE(block_buffer[i])) {
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case UCD9000_MON_VOLTAGE:
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case UCD9000_MON_VOLTAGE_HW:
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info->func[page] |= PMBUS_HAVE_VOUT
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| PMBUS_HAVE_STATUS_VOUT;
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break;
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case UCD9000_MON_TEMPERATURE:
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info->func[page] |= PMBUS_HAVE_TEMP2
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| PMBUS_HAVE_STATUS_TEMP;
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break;
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case UCD9000_MON_CURRENT:
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info->func[page] |= PMBUS_HAVE_IOUT
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| PMBUS_HAVE_STATUS_IOUT;
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break;
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default:
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break;
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}
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}
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/* Fan configuration */
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if (mid->driver_data == ucd90124) {
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for (i = 0; i < UCD9000_NUM_FAN; i++) {
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i2c_smbus_write_byte_data(client,
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UCD9000_FAN_CONFIG_INDEX, i);
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ret = i2c_smbus_read_block_data(client,
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UCD9000_FAN_CONFIG,
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data->fan_data[i]);
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if (ret < 0)
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goto out;
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}
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i2c_smbus_write_byte_data(client, UCD9000_FAN_CONFIG_INDEX, 0);
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info->read_byte_data = ucd9000_read_byte_data;
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info->func[0] |= PMBUS_HAVE_FAN12 | PMBUS_HAVE_STATUS_FAN12
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| PMBUS_HAVE_FAN34 | PMBUS_HAVE_STATUS_FAN34;
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}
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ret = pmbus_do_probe(client, mid, info);
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if (ret < 0)
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goto out;
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return 0;
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out:
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kfree(data);
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return ret;
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}
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static int ucd9000_remove(struct i2c_client *client)
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{
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int ret;
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struct ucd9000_data *data;
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data = to_ucd9000_data(pmbus_get_driver_info(client));
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ret = pmbus_do_remove(client);
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kfree(data);
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return ret;
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}
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/* This is the driver that will be inserted */
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static struct i2c_driver ucd9000_driver = {
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.driver = {
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.name = "ucd9000",
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},
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.probe = ucd9000_probe,
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.remove = ucd9000_remove,
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.id_table = ucd9000_id,
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};
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static int __init ucd9000_init(void)
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{
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return i2c_add_driver(&ucd9000_driver);
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}
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static void __exit ucd9000_exit(void)
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{
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i2c_del_driver(&ucd9000_driver);
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}
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MODULE_AUTHOR("Guenter Roeck");
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MODULE_DESCRIPTION("PMBus driver for TI UCD90xxx");
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MODULE_LICENSE("GPL");
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module_init(ucd9000_init);
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module_exit(ucd9000_exit);
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