hwmon: add support for JEDEC JC 42.4 compliant temperature sensors
[akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Cc: Jean Delvare <khali@linux-fr.org> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Hans de Goede <hdegoede@redhat.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Guenter Roeck
Linus Torvalds
parent
920fa1ffce
commit
4453d7364d
5 changed files with 709 additions and 0 deletions
97
Documentation/hwmon/jc42
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97
Documentation/hwmon/jc42
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@ -0,0 +1,97 @@
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Kernel driver jc42
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==================
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Supported chips:
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* Analog Devices ADT7408
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Prefix: 'adt7408'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://www.analog.com/static/imported-files/data_sheets/ADT7408.pdf
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* IDT TSE2002B3, TS3000B3
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Prefix: 'tse2002b3', 'ts3000b3'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://www.idt.com/products/getdoc.cfm?docid=18715691
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http://www.idt.com/products/getdoc.cfm?docid=18715692
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* Maxim MAX6604
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Prefix: 'max6604'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://datasheets.maxim-ic.com/en/ds/MAX6604.pdf
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* Microchip MCP9805, MCP98242, MCP98243, MCP9843
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Prefixes: 'mcp9805', 'mcp98242', 'mcp98243', 'mcp9843'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://ww1.microchip.com/downloads/en/DeviceDoc/21977b.pdf
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http://ww1.microchip.com/downloads/en/DeviceDoc/21996a.pdf
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http://ww1.microchip.com/downloads/en/DeviceDoc/22153c.pdf
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* NXP Semiconductors SE97, SE97B
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Prefix: 'se97'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://www.nxp.com/documents/data_sheet/SE97.pdf
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http://www.nxp.com/documents/data_sheet/SE97B.pdf
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* NXP Semiconductors SE98
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Prefix: 'se98'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://www.nxp.com/documents/data_sheet/SE98.pdf
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* ON Semiconductor CAT34TS02, CAT6095
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Prefix: 'cat34ts02', 'cat6095'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheet:
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http://www.onsemi.com/pub_link/Collateral/CAT34TS02-D.PDF
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http://www.onsemi.com/pub/Collateral/CAT6095-D.PDF
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* ST Microelectronics STTS424, STTS424E02
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Prefix: 'stts424'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheets:
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http://www.st.com/stonline/products/literature/ds/13447/stts424.pdf
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http://www.st.com/stonline/products/literature/ds/13448/stts424e02.pdf
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* JEDEC JC 42.4 compliant temperature sensor chips
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Prefix: 'jc42'
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Addresses scanned: I2C 0x18 - 0x1f
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Datasheet: -
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Author:
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Guenter Roeck <guenter.roeck@ericsson.com>
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Description
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-----------
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This driver implements support for JEDEC JC 42.4 compliant temperature sensors.
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The driver auto-detects the chips listed above, but can be manually instantiated
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to support other JC 42.4 compliant chips.
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Example: the following will load the driver for a generic JC 42.4 compliant
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temperature sensor at address 0x18 on I2C bus #1:
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# modprobe jc42
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# echo jc42 0x18 > /sys/bus/i2c/devices/i2c-1/new_device
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A JC 42.4 compliant chip supports a single temperature sensor. Minimum, maximum,
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and critical temperature can be configured. There are alarms for high, low,
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and critical thresholds.
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There is also an hysteresis to control the thresholds for resetting alarms.
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Per JC 42.4 specification, the hysteresis threshold can be configured to 0, 1.5,
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3.0, and 6.0 degrees C. Configured hysteresis values will be rounded to those
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limits. The chip supports only a single register to configure the hysteresis,
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which applies to all limits. This register can be written by writing into
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temp1_crit_hyst. Other hysteresis attributes are read-only.
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Sysfs entries
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-------------
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temp1_input Temperature (RO)
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temp1_min Minimum temperature (RW)
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temp1_max Maximum temperature (RW)
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temp1_crit Critical high temperature (RW)
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temp1_crit_hyst Critical hysteresis temperature (RW)
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temp1_max_hyst Maximum hysteresis temperature (RO)
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temp1_min_alarm Temperature low alarm
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temp1_max_alarm Temperature high alarm
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temp1_crit_alarm Temperature critical alarm
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@ -3211,6 +3211,13 @@ F: Documentation/video4linux/*.ivtv
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F: drivers/media/video/ivtv/
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F: drivers/media/video/ivtv/
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F: include/linux/ivtv*
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F: include/linux/ivtv*
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JC42.4 TEMPERATURE SENSOR DRIVER
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M: Guenter Roeck <linux@roeck-us.net>
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L: lm-sensors@lm-sensors.org
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S: Maintained
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F: drivers/hwmon/jc42.c
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F: Documentation/hwmon/jc42
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JFS FILESYSTEM
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JFS FILESYSTEM
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M: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
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M: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
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L: jfs-discussion@lists.sourceforge.net
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L: jfs-discussion@lists.sourceforge.net
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@ -463,6 +463,17 @@ config SENSORS_JZ4740
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This driver can also be build as a module. If so, the module will be
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This driver can also be build as a module. If so, the module will be
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called jz4740-hwmon.
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called jz4740-hwmon.
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config SENSORS_JC42
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tristate "JEDEC JC42.4 compliant temperature sensors"
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help
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If you say yes here you get support for Jedec JC42.4 compliant
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temperature sensors. Support will include, but not be limited to,
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ADT7408, CAT34TS02,, CAT6095, MAX6604, MCP9805, MCP98242, MCP98243,
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MCP9843, SE97, SE98, STTS424, TSE2002B3, and TS3000B3.
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This driver can also be built as a module. If so, the module
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will be called jc42.
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config SENSORS_LM63
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config SENSORS_LM63
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tristate "National Semiconductor LM63 and LM64"
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tristate "National Semiconductor LM63 and LM64"
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depends on I2C
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depends on I2C
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@ -56,6 +56,7 @@ obj-$(CONFIG_SENSORS_I5K_AMB) += i5k_amb.o
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obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
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obj-$(CONFIG_SENSORS_IBMAEM) += ibmaem.o
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obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
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obj-$(CONFIG_SENSORS_IBMPEX) += ibmpex.o
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obj-$(CONFIG_SENSORS_IT87) += it87.o
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obj-$(CONFIG_SENSORS_IT87) += it87.o
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obj-$(CONFIG_SENSORS_JC42) += jc42.o
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obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o
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obj-$(CONFIG_SENSORS_JZ4740) += jz4740-hwmon.o
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obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
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obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o
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obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o
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obj-$(CONFIG_SENSORS_K10TEMP) += k10temp.o
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593
drivers/hwmon/jc42.c
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593
drivers/hwmon/jc42.c
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/*
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* jc42.c - driver for Jedec JC42.4 compliant temperature sensors
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*
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* Copyright (c) 2010 Ericsson AB.
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*
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* Derived from lm77.c by Andras BALI <drewie@freemail.hu>.
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*
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* JC42.4 compliant temperature sensors are typically used on memory modules.
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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/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = {
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0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END };
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/* JC42 registers. All registers are 16 bit. */
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#define JC42_REG_CAP 0x00
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#define JC42_REG_CONFIG 0x01
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#define JC42_REG_TEMP_UPPER 0x02
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#define JC42_REG_TEMP_LOWER 0x03
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#define JC42_REG_TEMP_CRITICAL 0x04
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#define JC42_REG_TEMP 0x05
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#define JC42_REG_MANID 0x06
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#define JC42_REG_DEVICEID 0x07
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/* Status bits in temperature register */
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#define JC42_ALARM_CRIT_BIT 15
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#define JC42_ALARM_MAX_BIT 14
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#define JC42_ALARM_MIN_BIT 13
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/* Configuration register defines */
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#define JC42_CFG_CRIT_ONLY (1 << 2)
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#define JC42_CFG_SHUTDOWN (1 << 8)
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#define JC42_CFG_HYST_SHIFT 9
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#define JC42_CFG_HYST_MASK 0x03
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/* Capabilities */
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#define JC42_CAP_RANGE (1 << 2)
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/* Manufacturer IDs */
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#define ADT_MANID 0x11d4 /* Analog Devices */
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#define MAX_MANID 0x004d /* Maxim */
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#define IDT_MANID 0x00b3 /* IDT */
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#define MCP_MANID 0x0054 /* Microchip */
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#define NXP_MANID 0x1131 /* NXP Semiconductors */
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#define ONS_MANID 0x1b09 /* ON Semiconductor */
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#define STM_MANID 0x104a /* ST Microelectronics */
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/* Supported chips */
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/* Analog Devices */
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#define ADT7408_DEVID 0x0801
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#define ADT7408_DEVID_MASK 0xffff
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/* IDT */
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#define TS3000B3_DEVID 0x2903 /* Also matches TSE2002B3 */
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#define TS3000B3_DEVID_MASK 0xffff
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/* Maxim */
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#define MAX6604_DEVID 0x3e00
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#define MAX6604_DEVID_MASK 0xffff
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/* Microchip */
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#define MCP98242_DEVID 0x2000
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#define MCP98242_DEVID_MASK 0xfffc
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#define MCP98243_DEVID 0x2100
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#define MCP98243_DEVID_MASK 0xfffc
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#define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */
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#define MCP9843_DEVID_MASK 0xfffe
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/* NXP */
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#define SE97_DEVID 0xa200
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#define SE97_DEVID_MASK 0xfffc
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#define SE98_DEVID 0xa100
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#define SE98_DEVID_MASK 0xfffc
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/* ON Semiconductor */
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#define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */
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#define CAT6095_DEVID_MASK 0xffe0
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/* ST Microelectronics */
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#define STTS424_DEVID 0x0101
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#define STTS424_DEVID_MASK 0xffff
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#define STTS424E_DEVID 0x0000
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#define STTS424E_DEVID_MASK 0xfffe
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static u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 };
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struct jc42_chips {
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u16 manid;
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u16 devid;
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u16 devid_mask;
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};
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static struct jc42_chips jc42_chips[] = {
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{ ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK },
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{ IDT_MANID, TS3000B3_DEVID, TS3000B3_DEVID_MASK },
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{ MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK },
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{ MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK },
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{ MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK },
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{ MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK },
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{ NXP_MANID, SE97_DEVID, SE97_DEVID_MASK },
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{ ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK },
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{ NXP_MANID, SE98_DEVID, SE98_DEVID_MASK },
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{ STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK },
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{ STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK },
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};
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/* Each client has this additional data */
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struct jc42_data {
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struct device *hwmon_dev;
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struct mutex update_lock; /* protect register access */
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bool extended; /* true if extended range supported */
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bool valid;
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unsigned long last_updated; /* In jiffies */
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u16 orig_config; /* original configuration */
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u16 config; /* current configuration */
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u16 temp_input; /* Temperatures */
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u16 temp_crit;
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u16 temp_min;
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u16 temp_max;
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};
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static int jc42_probe(struct i2c_client *client,
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const struct i2c_device_id *id);
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static int jc42_detect(struct i2c_client *client, struct i2c_board_info *info);
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static int jc42_remove(struct i2c_client *client);
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static int jc42_read_value(struct i2c_client *client, u8 reg);
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static int jc42_write_value(struct i2c_client *client, u8 reg, u16 value);
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static struct jc42_data *jc42_update_device(struct device *dev);
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static const struct i2c_device_id jc42_id[] = {
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{ "adt7408", 0 },
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{ "cat94ts02", 0 },
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{ "cat6095", 0 },
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{ "jc42", 0 },
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{ "max6604", 0 },
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{ "mcp9805", 0 },
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{ "mcp98242", 0 },
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{ "mcp98243", 0 },
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{ "mcp9843", 0 },
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{ "se97", 0 },
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{ "se97b", 0 },
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{ "se98", 0 },
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{ "stts424", 0 },
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{ "tse2002b3", 0 },
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{ "ts3000b3", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, jc42_id);
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#ifdef CONFIG_PM
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static int jc42_suspend(struct device *dev)
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{
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||||||
|
struct i2c_client *client = to_i2c_client(dev);
|
||||||
|
struct jc42_data *data = i2c_get_clientdata(client);
|
||||||
|
|
||||||
|
data->config |= JC42_CFG_SHUTDOWN;
|
||||||
|
jc42_write_value(client, JC42_REG_CONFIG, data->config);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int jc42_resume(struct device *dev)
|
||||||
|
{
|
||||||
|
struct i2c_client *client = to_i2c_client(dev);
|
||||||
|
struct jc42_data *data = i2c_get_clientdata(client);
|
||||||
|
|
||||||
|
data->config &= ~JC42_CFG_SHUTDOWN;
|
||||||
|
jc42_write_value(client, JC42_REG_CONFIG, data->config);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static const struct dev_pm_ops jc42_dev_pm_ops = {
|
||||||
|
.suspend = jc42_suspend,
|
||||||
|
.resume = jc42_resume,
|
||||||
|
};
|
||||||
|
|
||||||
|
#define JC42_DEV_PM_OPS (&jc42_dev_pm_ops)
|
||||||
|
#else
|
||||||
|
#define JC42_DEV_PM_OPS NULL
|
||||||
|
#endif /* CONFIG_PM */
|
||||||
|
|
||||||
|
/* This is the driver that will be inserted */
|
||||||
|
static struct i2c_driver jc42_driver = {
|
||||||
|
.class = I2C_CLASS_HWMON,
|
||||||
|
.driver = {
|
||||||
|
.name = "jc42",
|
||||||
|
.pm = JC42_DEV_PM_OPS,
|
||||||
|
},
|
||||||
|
.probe = jc42_probe,
|
||||||
|
.remove = jc42_remove,
|
||||||
|
.id_table = jc42_id,
|
||||||
|
.detect = jc42_detect,
|
||||||
|
.address_list = normal_i2c,
|
||||||
|
};
|
||||||
|
|
||||||
|
#define JC42_TEMP_MIN_EXTENDED (-40000)
|
||||||
|
#define JC42_TEMP_MIN 0
|
||||||
|
#define JC42_TEMP_MAX 125000
|
||||||
|
|
||||||
|
static u16 jc42_temp_to_reg(int temp, bool extended)
|
||||||
|
{
|
||||||
|
int ntemp = SENSORS_LIMIT(temp,
|
||||||
|
extended ? JC42_TEMP_MIN_EXTENDED :
|
||||||
|
JC42_TEMP_MIN, JC42_TEMP_MAX);
|
||||||
|
|
||||||
|
/* convert from 0.001 to 0.0625 resolution */
|
||||||
|
return (ntemp * 2 / 125) & 0x1fff;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int jc42_temp_from_reg(s16 reg)
|
||||||
|
{
|
||||||
|
reg &= 0x1fff;
|
||||||
|
|
||||||
|
/* sign extend register */
|
||||||
|
if (reg & 0x1000)
|
||||||
|
reg |= 0xf000;
|
||||||
|
|
||||||
|
/* convert from 0.0625 to 0.001 resolution */
|
||||||
|
return reg * 125 / 2;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* sysfs stuff */
|
||||||
|
|
||||||
|
/* read routines for temperature limits */
|
||||||
|
#define show(value) \
|
||||||
|
static ssize_t show_##value(struct device *dev, \
|
||||||
|
struct device_attribute *attr, \
|
||||||
|
char *buf) \
|
||||||
|
{ \
|
||||||
|
struct jc42_data *data = jc42_update_device(dev); \
|
||||||
|
if (IS_ERR(data)) \
|
||||||
|
return PTR_ERR(data); \
|
||||||
|
return sprintf(buf, "%d\n", jc42_temp_from_reg(data->value)); \
|
||||||
|
}
|
||||||
|
|
||||||
|
show(temp_input);
|
||||||
|
show(temp_crit);
|
||||||
|
show(temp_min);
|
||||||
|
show(temp_max);
|
||||||
|
|
||||||
|
/* read routines for hysteresis values */
|
||||||
|
static ssize_t show_temp_crit_hyst(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
struct jc42_data *data = jc42_update_device(dev);
|
||||||
|
int temp, hyst;
|
||||||
|
|
||||||
|
if (IS_ERR(data))
|
||||||
|
return PTR_ERR(data);
|
||||||
|
|
||||||
|
temp = jc42_temp_from_reg(data->temp_crit);
|
||||||
|
hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
|
||||||
|
& JC42_CFG_HYST_MASK];
|
||||||
|
return sprintf(buf, "%d\n", temp - hyst);
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t show_temp_max_hyst(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
struct jc42_data *data = jc42_update_device(dev);
|
||||||
|
int temp, hyst;
|
||||||
|
|
||||||
|
if (IS_ERR(data))
|
||||||
|
return PTR_ERR(data);
|
||||||
|
|
||||||
|
temp = jc42_temp_from_reg(data->temp_max);
|
||||||
|
hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT)
|
||||||
|
& JC42_CFG_HYST_MASK];
|
||||||
|
return sprintf(buf, "%d\n", temp - hyst);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* write routines */
|
||||||
|
#define set(value, reg) \
|
||||||
|
static ssize_t set_##value(struct device *dev, \
|
||||||
|
struct device_attribute *attr, \
|
||||||
|
const char *buf, size_t count) \
|
||||||
|
{ \
|
||||||
|
struct i2c_client *client = to_i2c_client(dev); \
|
||||||
|
struct jc42_data *data = i2c_get_clientdata(client); \
|
||||||
|
int err, ret = count; \
|
||||||
|
long val; \
|
||||||
|
if (strict_strtol(buf, 10, &val) < 0) \
|
||||||
|
return -EINVAL; \
|
||||||
|
mutex_lock(&data->update_lock); \
|
||||||
|
data->value = jc42_temp_to_reg(val, data->extended); \
|
||||||
|
err = jc42_write_value(client, reg, data->value); \
|
||||||
|
if (err < 0) \
|
||||||
|
ret = err; \
|
||||||
|
mutex_unlock(&data->update_lock); \
|
||||||
|
return ret; \
|
||||||
|
}
|
||||||
|
|
||||||
|
set(temp_min, JC42_REG_TEMP_LOWER);
|
||||||
|
set(temp_max, JC42_REG_TEMP_UPPER);
|
||||||
|
set(temp_crit, JC42_REG_TEMP_CRITICAL);
|
||||||
|
|
||||||
|
/* JC42.4 compliant chips only support four hysteresis values.
|
||||||
|
* Pick best choice and go from there. */
|
||||||
|
static ssize_t set_temp_crit_hyst(struct device *dev,
|
||||||
|
struct device_attribute *attr,
|
||||||
|
const char *buf, size_t count)
|
||||||
|
{
|
||||||
|
struct i2c_client *client = to_i2c_client(dev);
|
||||||
|
struct jc42_data *data = i2c_get_clientdata(client);
|
||||||
|
long val;
|
||||||
|
int diff, hyst;
|
||||||
|
int err;
|
||||||
|
int ret = count;
|
||||||
|
|
||||||
|
if (strict_strtoul(buf, 10, &val) < 0)
|
||||||
|
return -EINVAL;
|
||||||
|
|
||||||
|
diff = jc42_temp_from_reg(data->temp_crit) - val;
|
||||||
|
hyst = 0;
|
||||||
|
if (diff > 0) {
|
||||||
|
if (diff < 2250)
|
||||||
|
hyst = 1; /* 1.5 degrees C */
|
||||||
|
else if (diff < 4500)
|
||||||
|
hyst = 2; /* 3.0 degrees C */
|
||||||
|
else
|
||||||
|
hyst = 3; /* 6.0 degrees C */
|
||||||
|
}
|
||||||
|
|
||||||
|
mutex_lock(&data->update_lock);
|
||||||
|
data->config = (data->config
|
||||||
|
& ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT))
|
||||||
|
| (hyst << JC42_CFG_HYST_SHIFT);
|
||||||
|
err = jc42_write_value(client, JC42_REG_CONFIG, data->config);
|
||||||
|
if (err < 0)
|
||||||
|
ret = err;
|
||||||
|
mutex_unlock(&data->update_lock);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static ssize_t show_alarm(struct device *dev,
|
||||||
|
struct device_attribute *attr, char *buf)
|
||||||
|
{
|
||||||
|
u16 bit = to_sensor_dev_attr(attr)->index;
|
||||||
|
struct jc42_data *data = jc42_update_device(dev);
|
||||||
|
u16 val;
|
||||||
|
|
||||||
|
if (IS_ERR(data))
|
||||||
|
return PTR_ERR(data);
|
||||||
|
|
||||||
|
val = data->temp_input;
|
||||||
|
if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY))
|
||||||
|
val = 0;
|
||||||
|
return sprintf(buf, "%u\n", (val >> bit) & 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
static DEVICE_ATTR(temp1_input, S_IRUGO,
|
||||||
|
show_temp_input, NULL);
|
||||||
|
static DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO,
|
||||||
|
show_temp_crit, set_temp_crit);
|
||||||
|
static DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO,
|
||||||
|
show_temp_min, set_temp_min);
|
||||||
|
static DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO,
|
||||||
|
show_temp_max, set_temp_max);
|
||||||
|
|
||||||
|
static DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
|
||||||
|
show_temp_crit_hyst, set_temp_crit_hyst);
|
||||||
|
static DEVICE_ATTR(temp1_max_hyst, S_IRUGO,
|
||||||
|
show_temp_max_hyst, NULL);
|
||||||
|
|
||||||
|
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL,
|
||||||
|
JC42_ALARM_CRIT_BIT);
|
||||||
|
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL,
|
||||||
|
JC42_ALARM_MIN_BIT);
|
||||||
|
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL,
|
||||||
|
JC42_ALARM_MAX_BIT);
|
||||||
|
|
||||||
|
static struct attribute *jc42_attributes[] = {
|
||||||
|
&dev_attr_temp1_input.attr,
|
||||||
|
&dev_attr_temp1_crit.attr,
|
||||||
|
&dev_attr_temp1_min.attr,
|
||||||
|
&dev_attr_temp1_max.attr,
|
||||||
|
&dev_attr_temp1_crit_hyst.attr,
|
||||||
|
&dev_attr_temp1_max_hyst.attr,
|
||||||
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
||||||
|
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
|
||||||
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
||||||
|
NULL
|
||||||
|
};
|
||||||
|
|
||||||
|
static const struct attribute_group jc42_group = {
|
||||||
|
.attrs = jc42_attributes,
|
||||||
|
};
|
||||||
|
|
||||||
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
||||||
|
static int jc42_detect(struct i2c_client *new_client,
|
||||||
|
struct i2c_board_info *info)
|
||||||
|
{
|
||||||
|
struct i2c_adapter *adapter = new_client->adapter;
|
||||||
|
int i, config, cap, manid, devid;
|
||||||
|
|
||||||
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
||||||
|
I2C_FUNC_SMBUS_WORD_DATA))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
cap = jc42_read_value(new_client, JC42_REG_CAP);
|
||||||
|
config = jc42_read_value(new_client, JC42_REG_CONFIG);
|
||||||
|
manid = jc42_read_value(new_client, JC42_REG_MANID);
|
||||||
|
devid = jc42_read_value(new_client, JC42_REG_DEVICEID);
|
||||||
|
|
||||||
|
if (cap < 0 || config < 0 || manid < 0 || devid < 0)
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
if ((cap & 0xff00) || (config & 0xf800))
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
|
for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) {
|
||||||
|
struct jc42_chips *chip = &jc42_chips[i];
|
||||||
|
if (manid == chip->manid &&
|
||||||
|
(devid & chip->devid_mask) == chip->devid) {
|
||||||
|
strlcpy(info->type, "jc42", I2C_NAME_SIZE);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return -ENODEV;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int jc42_probe(struct i2c_client *new_client,
|
||||||
|
const struct i2c_device_id *id)
|
||||||
|
{
|
||||||
|
struct jc42_data *data;
|
||||||
|
int config, cap, err;
|
||||||
|
|
||||||
|
data = kzalloc(sizeof(struct jc42_data), GFP_KERNEL);
|
||||||
|
if (!data) {
|
||||||
|
err = -ENOMEM;
|
||||||
|
goto exit;
|
||||||
|
}
|
||||||
|
|
||||||
|
i2c_set_clientdata(new_client, data);
|
||||||
|
mutex_init(&data->update_lock);
|
||||||
|
|
||||||
|
cap = jc42_read_value(new_client, JC42_REG_CAP);
|
||||||
|
if (cap < 0) {
|
||||||
|
err = -EINVAL;
|
||||||
|
goto exit_free;
|
||||||
|
}
|
||||||
|
data->extended = !!(cap & JC42_CAP_RANGE);
|
||||||
|
|
||||||
|
config = jc42_read_value(new_client, JC42_REG_CONFIG);
|
||||||
|
if (config < 0) {
|
||||||
|
err = -EINVAL;
|
||||||
|
goto exit_free;
|
||||||
|
}
|
||||||
|
data->orig_config = config;
|
||||||
|
if (config & JC42_CFG_SHUTDOWN) {
|
||||||
|
config &= ~JC42_CFG_SHUTDOWN;
|
||||||
|
jc42_write_value(new_client, JC42_REG_CONFIG, config);
|
||||||
|
}
|
||||||
|
data->config = config;
|
||||||
|
|
||||||
|
/* Register sysfs hooks */
|
||||||
|
err = sysfs_create_group(&new_client->dev.kobj, &jc42_group);
|
||||||
|
if (err)
|
||||||
|
goto exit_free;
|
||||||
|
|
||||||
|
data->hwmon_dev = hwmon_device_register(&new_client->dev);
|
||||||
|
if (IS_ERR(data->hwmon_dev)) {
|
||||||
|
err = PTR_ERR(data->hwmon_dev);
|
||||||
|
goto exit_remove;
|
||||||
|
}
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
exit_remove:
|
||||||
|
sysfs_remove_group(&new_client->dev.kobj, &jc42_group);
|
||||||
|
exit_free:
|
||||||
|
kfree(data);
|
||||||
|
exit:
|
||||||
|
return err;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int jc42_remove(struct i2c_client *client)
|
||||||
|
{
|
||||||
|
struct jc42_data *data = i2c_get_clientdata(client);
|
||||||
|
hwmon_device_unregister(data->hwmon_dev);
|
||||||
|
sysfs_remove_group(&client->dev.kobj, &jc42_group);
|
||||||
|
if (data->config != data->orig_config)
|
||||||
|
jc42_write_value(client, JC42_REG_CONFIG, data->orig_config);
|
||||||
|
kfree(data);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* All registers are word-sized. */
|
||||||
|
static int jc42_read_value(struct i2c_client *client, u8 reg)
|
||||||
|
{
|
||||||
|
int ret = i2c_smbus_read_word_data(client, reg);
|
||||||
|
if (ret < 0)
|
||||||
|
return ret;
|
||||||
|
return swab16(ret);
|
||||||
|
}
|
||||||
|
|
||||||
|
static int jc42_write_value(struct i2c_client *client, u8 reg, u16 value)
|
||||||
|
{
|
||||||
|
return i2c_smbus_write_word_data(client, reg, swab16(value));
|
||||||
|
}
|
||||||
|
|
||||||
|
static struct jc42_data *jc42_update_device(struct device *dev)
|
||||||
|
{
|
||||||
|
struct i2c_client *client = to_i2c_client(dev);
|
||||||
|
struct jc42_data *data = i2c_get_clientdata(client);
|
||||||
|
struct jc42_data *ret = data;
|
||||||
|
int val;
|
||||||
|
|
||||||
|
mutex_lock(&data->update_lock);
|
||||||
|
|
||||||
|
if (time_after(jiffies, data->last_updated + HZ) || !data->valid) {
|
||||||
|
val = jc42_read_value(client, JC42_REG_TEMP);
|
||||||
|
if (val < 0) {
|
||||||
|
ret = ERR_PTR(val);
|
||||||
|
goto abort;
|
||||||
|
}
|
||||||
|
data->temp_input = val;
|
||||||
|
|
||||||
|
val = jc42_read_value(client, JC42_REG_TEMP_CRITICAL);
|
||||||
|
if (val < 0) {
|
||||||
|
ret = ERR_PTR(val);
|
||||||
|
goto abort;
|
||||||
|
}
|
||||||
|
data->temp_crit = val;
|
||||||
|
|
||||||
|
val = jc42_read_value(client, JC42_REG_TEMP_LOWER);
|
||||||
|
if (val < 0) {
|
||||||
|
ret = ERR_PTR(val);
|
||||||
|
goto abort;
|
||||||
|
}
|
||||||
|
data->temp_min = val;
|
||||||
|
|
||||||
|
val = jc42_read_value(client, JC42_REG_TEMP_UPPER);
|
||||||
|
if (val < 0) {
|
||||||
|
ret = ERR_PTR(val);
|
||||||
|
goto abort;
|
||||||
|
}
|
||||||
|
data->temp_max = val;
|
||||||
|
|
||||||
|
data->last_updated = jiffies;
|
||||||
|
data->valid = true;
|
||||||
|
}
|
||||||
|
abort:
|
||||||
|
mutex_unlock(&data->update_lock);
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int __init sensors_jc42_init(void)
|
||||||
|
{
|
||||||
|
return i2c_add_driver(&jc42_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
static void __exit sensors_jc42_exit(void)
|
||||||
|
{
|
||||||
|
i2c_del_driver(&jc42_driver);
|
||||||
|
}
|
||||||
|
|
||||||
|
MODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>");
|
||||||
|
MODULE_DESCRIPTION("JC42 driver");
|
||||||
|
MODULE_LICENSE("GPL");
|
||||||
|
|
||||||
|
module_init(sensors_jc42_init);
|
||||||
|
module_exit(sensors_jc42_exit);
|
||||||
Loading…
Reference in a new issue