forked from Minki/linux
a095f687f1
The optional extended local temperature register can never have address 0, as this address is already used by another register. Thus we can get rid of flag LM90_HAVE_LOCAL_EXT and simply rely on reg_local_ext being non-zero to determine if a given chip has this extension or not. This makes the code more simple. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Stijn Devriendt <sdevrien@cisco.com> Cc: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
1539 lines
45 KiB
C
1539 lines
45 KiB
C
/*
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* lm90.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (C) 2003-2010 Jean Delvare <khali@linux-fr.org>
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*
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* Based on the lm83 driver. The LM90 is a sensor chip made by National
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* Semiconductor. It reports up to two temperatures (its own plus up to
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* one external one) with a 0.125 deg resolution (1 deg for local
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* temperature) and a 3-4 deg accuracy.
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*
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* This driver also supports the LM89 and LM99, two other sensor chips
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* made by National Semiconductor. Both have an increased remote
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* temperature measurement accuracy (1 degree), and the LM99
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* additionally shifts remote temperatures (measured and limits) by 16
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* degrees, which allows for higher temperatures measurement.
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* Note that there is no way to differentiate between both chips.
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* When device is auto-detected, the driver will assume an LM99.
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*
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* This driver also supports the LM86, another sensor chip made by
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* National Semiconductor. It is exactly similar to the LM90 except it
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* has a higher accuracy.
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*
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* This driver also supports the ADM1032, a sensor chip made by Analog
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* Devices. That chip is similar to the LM90, with a few differences
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* that are not handled by this driver. Among others, it has a higher
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* accuracy than the LM90, much like the LM86 does.
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*
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* This driver also supports the MAX6657, MAX6658 and MAX6659 sensor
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* chips made by Maxim. These chips are similar to the LM86.
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* Note that there is no easy way to differentiate between the three
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* variants. We use the device address to detect MAX6659, which will result
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* in a detection as max6657 if it is on address 0x4c. The extra address
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* and features of the MAX6659 are only supported if the chip is configured
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* explicitly as max6659, or if its address is not 0x4c.
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* These chips lack the remote temperature offset feature.
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*
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* This driver also supports the MAX6646, MAX6647, MAX6648, MAX6649 and
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* MAX6692 chips made by Maxim. These are again similar to the LM86,
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* but they use unsigned temperature values and can report temperatures
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* from 0 to 145 degrees.
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*
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* This driver also supports the MAX6680 and MAX6681, two other sensor
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* chips made by Maxim. These are quite similar to the other Maxim
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* chips. The MAX6680 and MAX6681 only differ in the pinout so they can
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* be treated identically.
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*
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* This driver also supports the MAX6695 and MAX6696, two other sensor
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* chips made by Maxim. These are also quite similar to other Maxim
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* chips, but support three temperature sensors instead of two. MAX6695
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* and MAX6696 only differ in the pinout so they can be treated identically.
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*
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* This driver also supports ADT7461 and ADT7461A from Analog Devices as well as
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* NCT1008 from ON Semiconductor. The chips are supported in both compatibility
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* and extended mode. They are mostly compatible with LM90 except for a data
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* format difference for the temperature value registers.
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*
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* This driver also supports the SA56004 from Philips. This device is
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* pin-compatible with the LM86, the ED/EDP parts are also address-compatible.
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*
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* Since the LM90 was the first chipset supported by this driver, most
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* comments will refer to this chipset, but are actually general and
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* concern all supported chipsets, unless mentioned otherwise.
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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-sysfs.h>
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#include <linux/hwmon.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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/*
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* Addresses to scan
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* Address is fully defined internally and cannot be changed except for
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* MAX6659, MAX6680 and MAX6681.
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* LM86, LM89, LM90, LM99, ADM1032, ADM1032-1, ADT7461, ADT7461A, MAX6649,
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* MAX6657, MAX6658, NCT1008 and W83L771 have address 0x4c.
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* ADM1032-2, ADT7461-2, ADT7461A-2, LM89-1, LM99-1, MAX6646, and NCT1008D
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* have address 0x4d.
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* MAX6647 has address 0x4e.
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* MAX6659 can have address 0x4c, 0x4d or 0x4e.
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* MAX6680 and MAX6681 can have address 0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b,
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* 0x4c, 0x4d or 0x4e.
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* SA56004 can have address 0x48 through 0x4F.
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*/
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static const unsigned short normal_i2c[] = {
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0x18, 0x19, 0x1a, 0x29, 0x2a, 0x2b, 0x48, 0x49, 0x4a, 0x4b, 0x4c,
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0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
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enum chips { lm90, adm1032, lm99, lm86, max6657, max6659, adt7461, max6680,
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max6646, w83l771, max6696, sa56004 };
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/*
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* The LM90 registers
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*/
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#define LM90_REG_R_MAN_ID 0xFE
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#define LM90_REG_R_CHIP_ID 0xFF
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#define LM90_REG_R_CONFIG1 0x03
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#define LM90_REG_W_CONFIG1 0x09
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#define LM90_REG_R_CONFIG2 0xBF
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#define LM90_REG_W_CONFIG2 0xBF
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#define LM90_REG_R_CONVRATE 0x04
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#define LM90_REG_W_CONVRATE 0x0A
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#define LM90_REG_R_STATUS 0x02
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#define LM90_REG_R_LOCAL_TEMP 0x00
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#define LM90_REG_R_LOCAL_HIGH 0x05
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#define LM90_REG_W_LOCAL_HIGH 0x0B
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#define LM90_REG_R_LOCAL_LOW 0x06
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#define LM90_REG_W_LOCAL_LOW 0x0C
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#define LM90_REG_R_LOCAL_CRIT 0x20
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#define LM90_REG_W_LOCAL_CRIT 0x20
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#define LM90_REG_R_REMOTE_TEMPH 0x01
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#define LM90_REG_R_REMOTE_TEMPL 0x10
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#define LM90_REG_R_REMOTE_OFFSH 0x11
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#define LM90_REG_W_REMOTE_OFFSH 0x11
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#define LM90_REG_R_REMOTE_OFFSL 0x12
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#define LM90_REG_W_REMOTE_OFFSL 0x12
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#define LM90_REG_R_REMOTE_HIGHH 0x07
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#define LM90_REG_W_REMOTE_HIGHH 0x0D
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#define LM90_REG_R_REMOTE_HIGHL 0x13
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#define LM90_REG_W_REMOTE_HIGHL 0x13
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#define LM90_REG_R_REMOTE_LOWH 0x08
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#define LM90_REG_W_REMOTE_LOWH 0x0E
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#define LM90_REG_R_REMOTE_LOWL 0x14
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#define LM90_REG_W_REMOTE_LOWL 0x14
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#define LM90_REG_R_REMOTE_CRIT 0x19
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#define LM90_REG_W_REMOTE_CRIT 0x19
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#define LM90_REG_R_TCRIT_HYST 0x21
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#define LM90_REG_W_TCRIT_HYST 0x21
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/* MAX6646/6647/6649/6657/6658/6659/6695/6696 registers */
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#define MAX6657_REG_R_LOCAL_TEMPL 0x11
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#define MAX6696_REG_R_STATUS2 0x12
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#define MAX6659_REG_R_REMOTE_EMERG 0x16
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#define MAX6659_REG_W_REMOTE_EMERG 0x16
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#define MAX6659_REG_R_LOCAL_EMERG 0x17
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#define MAX6659_REG_W_LOCAL_EMERG 0x17
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/* SA56004 registers */
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#define SA56004_REG_R_LOCAL_TEMPL 0x22
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#define LM90_DEF_CONVRATE_RVAL 6 /* Def conversion rate register value */
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#define LM90_MAX_CONVRATE_MS 16000 /* Maximum conversion rate in ms */
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/*
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* Device flags
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*/
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#define LM90_FLAG_ADT7461_EXT (1 << 0) /* ADT7461 extended mode */
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/* Device features */
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#define LM90_HAVE_OFFSET (1 << 1) /* temperature offset register */
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#define LM90_HAVE_REM_LIMIT_EXT (1 << 3) /* extended remote limit */
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#define LM90_HAVE_EMERGENCY (1 << 4) /* 3rd upper (emergency) limit */
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#define LM90_HAVE_EMERGENCY_ALARM (1 << 5)/* emergency alarm */
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#define LM90_HAVE_TEMP3 (1 << 6) /* 3rd temperature sensor */
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#define LM90_HAVE_BROKEN_ALERT (1 << 7) /* Broken alert */
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/*
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* Driver data (common to all clients)
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*/
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static const struct i2c_device_id lm90_id[] = {
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{ "adm1032", adm1032 },
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{ "adt7461", adt7461 },
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{ "adt7461a", adt7461 },
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{ "lm90", lm90 },
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{ "lm86", lm86 },
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{ "lm89", lm86 },
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{ "lm99", lm99 },
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{ "max6646", max6646 },
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{ "max6647", max6646 },
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{ "max6649", max6646 },
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{ "max6657", max6657 },
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{ "max6658", max6657 },
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{ "max6659", max6659 },
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{ "max6680", max6680 },
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{ "max6681", max6680 },
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{ "max6695", max6696 },
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{ "max6696", max6696 },
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{ "nct1008", adt7461 },
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{ "w83l771", w83l771 },
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{ "sa56004", sa56004 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, lm90_id);
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/*
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* chip type specific parameters
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*/
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struct lm90_params {
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u32 flags; /* Capabilities */
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u16 alert_alarms; /* Which alarm bits trigger ALERT# */
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/* Upper 8 bits for max6695/96 */
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u8 max_convrate; /* Maximum conversion rate register value */
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u8 reg_local_ext; /* Extended local temp register (optional) */
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};
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static const struct lm90_params lm90_params[] = {
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[adm1032] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
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| LM90_HAVE_BROKEN_ALERT,
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.alert_alarms = 0x7c,
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.max_convrate = 10,
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},
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[adt7461] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT
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| LM90_HAVE_BROKEN_ALERT,
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.alert_alarms = 0x7c,
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.max_convrate = 10,
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},
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[lm86] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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},
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[lm90] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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},
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[lm99] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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},
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[max6646] = {
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.alert_alarms = 0x7c,
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.max_convrate = 6,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[max6657] = {
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[max6659] = {
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.flags = LM90_HAVE_EMERGENCY,
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[max6680] = {
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.flags = LM90_HAVE_OFFSET,
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.alert_alarms = 0x7c,
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.max_convrate = 7,
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},
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[max6696] = {
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.flags = LM90_HAVE_EMERGENCY
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| LM90_HAVE_EMERGENCY_ALARM | LM90_HAVE_TEMP3,
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.alert_alarms = 0x187c,
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.max_convrate = 6,
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.reg_local_ext = MAX6657_REG_R_LOCAL_TEMPL,
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},
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[w83l771] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7c,
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.max_convrate = 8,
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},
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[sa56004] = {
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.flags = LM90_HAVE_OFFSET | LM90_HAVE_REM_LIMIT_EXT,
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.alert_alarms = 0x7b,
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.max_convrate = 9,
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.reg_local_ext = SA56004_REG_R_LOCAL_TEMPL,
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},
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};
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/*
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* Client data (each client gets its own)
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*/
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struct lm90_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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char valid; /* zero until following fields are valid */
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unsigned long last_updated; /* in jiffies */
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int kind;
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u32 flags;
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int update_interval; /* in milliseconds */
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u8 config_orig; /* Original configuration register value */
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u8 convrate_orig; /* Original conversion rate register value */
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u16 alert_alarms; /* Which alarm bits trigger ALERT# */
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/* Upper 8 bits for max6695/96 */
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u8 max_convrate; /* Maximum conversion rate */
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u8 reg_local_ext; /* local extension register offset */
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/* registers values */
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s8 temp8[8]; /* 0: local low limit
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1: local high limit
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2: local critical limit
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3: remote critical limit
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4: local emergency limit (max6659 and max6695/96)
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5: remote emergency limit (max6659 and max6695/96)
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6: remote 2 critical limit (max6695/96 only)
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7: remote 2 emergency limit (max6695/96 only) */
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s16 temp11[8]; /* 0: remote input
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1: remote low limit
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2: remote high limit
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3: remote offset (except max6646, max6657/58/59,
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and max6695/96)
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4: local input
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5: remote 2 input (max6695/96 only)
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6: remote 2 low limit (max6695/96 only)
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7: remote 2 high limit (ma6695/96 only) */
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u8 temp_hyst;
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u16 alarms; /* bitvector (upper 8 bits for max6695/96) */
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};
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/*
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* Support functions
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*/
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/*
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* The ADM1032 supports PEC but not on write byte transactions, so we need
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* to explicitly ask for a transaction without PEC.
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*/
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static inline s32 adm1032_write_byte(struct i2c_client *client, u8 value)
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{
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return i2c_smbus_xfer(client->adapter, client->addr,
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client->flags & ~I2C_CLIENT_PEC,
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I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL);
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}
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/*
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* It is assumed that client->update_lock is held (unless we are in
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* detection or initialization steps). This matters when PEC is enabled,
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* because we don't want the address pointer to change between the write
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* byte and the read byte transactions.
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*/
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static int lm90_read_reg(struct i2c_client *client, u8 reg, u8 *value)
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{
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int err;
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if (client->flags & I2C_CLIENT_PEC) {
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err = adm1032_write_byte(client, reg);
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if (err >= 0)
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err = i2c_smbus_read_byte(client);
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} else
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err = i2c_smbus_read_byte_data(client, reg);
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if (err < 0) {
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dev_warn(&client->dev, "Register %#02x read failed (%d)\n",
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reg, err);
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return err;
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}
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*value = err;
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return 0;
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}
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static int lm90_read16(struct i2c_client *client, u8 regh, u8 regl, u16 *value)
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{
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int err;
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u8 oldh, newh, l;
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/*
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* There is a trick here. We have to read two registers to have the
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* sensor temperature, but we have to beware a conversion could occur
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* between the readings. The datasheet says we should either use
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* the one-shot conversion register, which we don't want to do
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* (disables hardware monitoring) or monitor the busy bit, which is
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* impossible (we can't read the values and monitor that bit at the
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* exact same time). So the solution used here is to read the high
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* byte once, then the low byte, then the high byte again. If the new
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* high byte matches the old one, then we have a valid reading. Else
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* we have to read the low byte again, and now we believe we have a
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* correct reading.
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*/
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if ((err = lm90_read_reg(client, regh, &oldh))
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|| (err = lm90_read_reg(client, regl, &l))
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|| (err = lm90_read_reg(client, regh, &newh)))
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return err;
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if (oldh != newh) {
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err = lm90_read_reg(client, regl, &l);
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if (err)
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return err;
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}
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*value = (newh << 8) | l;
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return 0;
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}
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/*
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* client->update_lock must be held when calling this function (unless we are
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* in detection or initialization steps), and while a remote channel other
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* than channel 0 is selected. Also, calling code must make sure to re-select
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* external channel 0 before releasing the lock. This is necessary because
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* various registers have different meanings as a result of selecting a
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* non-default remote channel.
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*/
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static inline void lm90_select_remote_channel(struct i2c_client *client,
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struct lm90_data *data,
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int channel)
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{
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u8 config;
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if (data->kind == max6696) {
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lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
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config &= ~0x08;
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if (channel)
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config |= 0x08;
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i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
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config);
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}
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}
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/*
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* Set conversion rate.
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* client->update_lock must be held when calling this function (unless we are
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* in detection or initialization steps).
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*/
|
|
static void lm90_set_convrate(struct i2c_client *client, struct lm90_data *data,
|
|
unsigned int interval)
|
|
{
|
|
int i;
|
|
unsigned int update_interval;
|
|
|
|
/* Shift calculations to avoid rounding errors */
|
|
interval <<= 6;
|
|
|
|
/* find the nearest update rate */
|
|
for (i = 0, update_interval = LM90_MAX_CONVRATE_MS << 6;
|
|
i < data->max_convrate; i++, update_interval >>= 1)
|
|
if (interval >= update_interval * 3 / 4)
|
|
break;
|
|
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE, i);
|
|
data->update_interval = DIV_ROUND_CLOSEST(update_interval, 64);
|
|
}
|
|
|
|
static struct lm90_data *lm90_update_device(struct device *dev)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
unsigned long next_update;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
|
|
next_update = data->last_updated
|
|
+ msecs_to_jiffies(data->update_interval) + 1;
|
|
if (time_after(jiffies, next_update) || !data->valid) {
|
|
u8 h, l;
|
|
u8 alarms;
|
|
|
|
dev_dbg(&client->dev, "Updating lm90 data.\n");
|
|
lm90_read_reg(client, LM90_REG_R_LOCAL_LOW, &data->temp8[0]);
|
|
lm90_read_reg(client, LM90_REG_R_LOCAL_HIGH, &data->temp8[1]);
|
|
lm90_read_reg(client, LM90_REG_R_LOCAL_CRIT, &data->temp8[2]);
|
|
lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT, &data->temp8[3]);
|
|
lm90_read_reg(client, LM90_REG_R_TCRIT_HYST, &data->temp_hyst);
|
|
|
|
if (data->reg_local_ext) {
|
|
lm90_read16(client, LM90_REG_R_LOCAL_TEMP,
|
|
data->reg_local_ext,
|
|
&data->temp11[4]);
|
|
} else {
|
|
if (lm90_read_reg(client, LM90_REG_R_LOCAL_TEMP,
|
|
&h) == 0)
|
|
data->temp11[4] = h << 8;
|
|
}
|
|
lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
|
|
LM90_REG_R_REMOTE_TEMPL, &data->temp11[0]);
|
|
|
|
if (lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h) == 0) {
|
|
data->temp11[1] = h << 8;
|
|
if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
&& lm90_read_reg(client, LM90_REG_R_REMOTE_LOWL,
|
|
&l) == 0)
|
|
data->temp11[1] |= l;
|
|
}
|
|
if (lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h) == 0) {
|
|
data->temp11[2] = h << 8;
|
|
if ((data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
&& lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHL,
|
|
&l) == 0)
|
|
data->temp11[2] |= l;
|
|
}
|
|
|
|
if (data->flags & LM90_HAVE_OFFSET) {
|
|
if (lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSH,
|
|
&h) == 0
|
|
&& lm90_read_reg(client, LM90_REG_R_REMOTE_OFFSL,
|
|
&l) == 0)
|
|
data->temp11[3] = (h << 8) | l;
|
|
}
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
lm90_read_reg(client, MAX6659_REG_R_LOCAL_EMERG,
|
|
&data->temp8[4]);
|
|
lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
|
|
&data->temp8[5]);
|
|
}
|
|
lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
|
|
data->alarms = alarms; /* save as 16 bit value */
|
|
|
|
if (data->kind == max6696) {
|
|
lm90_select_remote_channel(client, data, 1);
|
|
lm90_read_reg(client, LM90_REG_R_REMOTE_CRIT,
|
|
&data->temp8[6]);
|
|
lm90_read_reg(client, MAX6659_REG_R_REMOTE_EMERG,
|
|
&data->temp8[7]);
|
|
lm90_read16(client, LM90_REG_R_REMOTE_TEMPH,
|
|
LM90_REG_R_REMOTE_TEMPL, &data->temp11[5]);
|
|
if (!lm90_read_reg(client, LM90_REG_R_REMOTE_LOWH, &h))
|
|
data->temp11[6] = h << 8;
|
|
if (!lm90_read_reg(client, LM90_REG_R_REMOTE_HIGHH, &h))
|
|
data->temp11[7] = h << 8;
|
|
lm90_select_remote_channel(client, data, 0);
|
|
|
|
if (!lm90_read_reg(client, MAX6696_REG_R_STATUS2,
|
|
&alarms))
|
|
data->alarms |= alarms << 8;
|
|
}
|
|
|
|
/* Re-enable ALERT# output if it was originally enabled and
|
|
* relevant alarms are all clear */
|
|
if ((data->config_orig & 0x80) == 0
|
|
&& (data->alarms & data->alert_alarms) == 0) {
|
|
u8 config;
|
|
|
|
lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
|
|
if (config & 0x80) {
|
|
dev_dbg(&client->dev, "Re-enabling ALERT#\n");
|
|
i2c_smbus_write_byte_data(client,
|
|
LM90_REG_W_CONFIG1,
|
|
config & ~0x80);
|
|
}
|
|
}
|
|
|
|
data->last_updated = jiffies;
|
|
data->valid = 1;
|
|
}
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return data;
|
|
}
|
|
|
|
/*
|
|
* Conversions
|
|
* For local temperatures and limits, critical limits and the hysteresis
|
|
* value, the LM90 uses signed 8-bit values with LSB = 1 degree Celsius.
|
|
* For remote temperatures and limits, it uses signed 11-bit values with
|
|
* LSB = 0.125 degree Celsius, left-justified in 16-bit registers. Some
|
|
* Maxim chips use unsigned values.
|
|
*/
|
|
|
|
static inline int temp_from_s8(s8 val)
|
|
{
|
|
return val * 1000;
|
|
}
|
|
|
|
static inline int temp_from_u8(u8 val)
|
|
{
|
|
return val * 1000;
|
|
}
|
|
|
|
static inline int temp_from_s16(s16 val)
|
|
{
|
|
return val / 32 * 125;
|
|
}
|
|
|
|
static inline int temp_from_u16(u16 val)
|
|
{
|
|
return val / 32 * 125;
|
|
}
|
|
|
|
static s8 temp_to_s8(long val)
|
|
{
|
|
if (val <= -128000)
|
|
return -128;
|
|
if (val >= 127000)
|
|
return 127;
|
|
if (val < 0)
|
|
return (val - 500) / 1000;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
static u8 temp_to_u8(long val)
|
|
{
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 255000)
|
|
return 255;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
static s16 temp_to_s16(long val)
|
|
{
|
|
if (val <= -128000)
|
|
return 0x8000;
|
|
if (val >= 127875)
|
|
return 0x7FE0;
|
|
if (val < 0)
|
|
return (val - 62) / 125 * 32;
|
|
return (val + 62) / 125 * 32;
|
|
}
|
|
|
|
static u8 hyst_to_reg(long val)
|
|
{
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 30500)
|
|
return 31;
|
|
return (val + 500) / 1000;
|
|
}
|
|
|
|
/*
|
|
* ADT7461 in compatibility mode is almost identical to LM90 except that
|
|
* attempts to write values that are outside the range 0 < temp < 127 are
|
|
* treated as the boundary value.
|
|
*
|
|
* ADT7461 in "extended mode" operation uses unsigned integers offset by
|
|
* 64 (e.g., 0 -> -64 degC). The range is restricted to -64..191 degC.
|
|
*/
|
|
static inline int temp_from_u8_adt7461(struct lm90_data *data, u8 val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT)
|
|
return (val - 64) * 1000;
|
|
else
|
|
return temp_from_s8(val);
|
|
}
|
|
|
|
static inline int temp_from_u16_adt7461(struct lm90_data *data, u16 val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT)
|
|
return (val - 0x4000) / 64 * 250;
|
|
else
|
|
return temp_from_s16(val);
|
|
}
|
|
|
|
static u8 temp_to_u8_adt7461(struct lm90_data *data, long val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT) {
|
|
if (val <= -64000)
|
|
return 0;
|
|
if (val >= 191000)
|
|
return 0xFF;
|
|
return (val + 500 + 64000) / 1000;
|
|
} else {
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 127000)
|
|
return 127;
|
|
return (val + 500) / 1000;
|
|
}
|
|
}
|
|
|
|
static u16 temp_to_u16_adt7461(struct lm90_data *data, long val)
|
|
{
|
|
if (data->flags & LM90_FLAG_ADT7461_EXT) {
|
|
if (val <= -64000)
|
|
return 0;
|
|
if (val >= 191750)
|
|
return 0xFFC0;
|
|
return (val + 64000 + 125) / 250 * 64;
|
|
} else {
|
|
if (val <= 0)
|
|
return 0;
|
|
if (val >= 127750)
|
|
return 0x7FC0;
|
|
return (val + 125) / 250 * 64;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Sysfs stuff
|
|
*/
|
|
|
|
static ssize_t show_temp8(struct device *dev, struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct lm90_data *data = lm90_update_device(dev);
|
|
int temp;
|
|
|
|
if (data->kind == adt7461)
|
|
temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u8(data->temp8[attr->index]);
|
|
else
|
|
temp = temp_from_s8(data->temp8[attr->index]);
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && attr->index == 3)
|
|
temp += 16000;
|
|
|
|
return sprintf(buf, "%d\n", temp);
|
|
}
|
|
|
|
static ssize_t set_temp8(struct device *dev, struct device_attribute *devattr,
|
|
const char *buf, size_t count)
|
|
{
|
|
static const u8 reg[8] = {
|
|
LM90_REG_W_LOCAL_LOW,
|
|
LM90_REG_W_LOCAL_HIGH,
|
|
LM90_REG_W_LOCAL_CRIT,
|
|
LM90_REG_W_REMOTE_CRIT,
|
|
MAX6659_REG_W_LOCAL_EMERG,
|
|
MAX6659_REG_W_REMOTE_EMERG,
|
|
LM90_REG_W_REMOTE_CRIT,
|
|
MAX6659_REG_W_REMOTE_EMERG,
|
|
};
|
|
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
int nr = attr->index;
|
|
long val;
|
|
int err;
|
|
|
|
err = strict_strtol(buf, 10, &val);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && attr->index == 3)
|
|
val -= 16000;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
if (data->kind == adt7461)
|
|
data->temp8[nr] = temp_to_u8_adt7461(data, val);
|
|
else if (data->kind == max6646)
|
|
data->temp8[nr] = temp_to_u8(val);
|
|
else
|
|
data->temp8[nr] = temp_to_s8(val);
|
|
|
|
lm90_select_remote_channel(client, data, nr >= 6);
|
|
i2c_smbus_write_byte_data(client, reg[nr], data->temp8[nr]);
|
|
lm90_select_remote_channel(client, data, 0);
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_temp11(struct device *dev, struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
|
|
struct lm90_data *data = lm90_update_device(dev);
|
|
int temp;
|
|
|
|
if (data->kind == adt7461)
|
|
temp = temp_from_u16_adt7461(data, data->temp11[attr->index]);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u16(data->temp11[attr->index]);
|
|
else
|
|
temp = temp_from_s16(data->temp11[attr->index]);
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && attr->index <= 2)
|
|
temp += 16000;
|
|
|
|
return sprintf(buf, "%d\n", temp);
|
|
}
|
|
|
|
static ssize_t set_temp11(struct device *dev, struct device_attribute *devattr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct {
|
|
u8 high;
|
|
u8 low;
|
|
int channel;
|
|
} reg[5] = {
|
|
{ LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 0 },
|
|
{ LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 0 },
|
|
{ LM90_REG_W_REMOTE_OFFSH, LM90_REG_W_REMOTE_OFFSL, 0 },
|
|
{ LM90_REG_W_REMOTE_LOWH, LM90_REG_W_REMOTE_LOWL, 1 },
|
|
{ LM90_REG_W_REMOTE_HIGHH, LM90_REG_W_REMOTE_HIGHL, 1 }
|
|
};
|
|
|
|
struct sensor_device_attribute_2 *attr = to_sensor_dev_attr_2(devattr);
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
int nr = attr->nr;
|
|
int index = attr->index;
|
|
long val;
|
|
int err;
|
|
|
|
err = strict_strtol(buf, 10, &val);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && index <= 2)
|
|
val -= 16000;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
if (data->kind == adt7461)
|
|
data->temp11[index] = temp_to_u16_adt7461(data, val);
|
|
else if (data->kind == max6646)
|
|
data->temp11[index] = temp_to_u8(val) << 8;
|
|
else if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
data->temp11[index] = temp_to_s16(val);
|
|
else
|
|
data->temp11[index] = temp_to_s8(val) << 8;
|
|
|
|
lm90_select_remote_channel(client, data, reg[nr].channel);
|
|
i2c_smbus_write_byte_data(client, reg[nr].high,
|
|
data->temp11[index] >> 8);
|
|
if (data->flags & LM90_HAVE_REM_LIMIT_EXT)
|
|
i2c_smbus_write_byte_data(client, reg[nr].low,
|
|
data->temp11[index] & 0xff);
|
|
lm90_select_remote_channel(client, data, 0);
|
|
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_temphyst(struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct lm90_data *data = lm90_update_device(dev);
|
|
int temp;
|
|
|
|
if (data->kind == adt7461)
|
|
temp = temp_from_u8_adt7461(data, data->temp8[attr->index]);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u8(data->temp8[attr->index]);
|
|
else
|
|
temp = temp_from_s8(data->temp8[attr->index]);
|
|
|
|
/* +16 degrees offset for temp2 for the LM99 */
|
|
if (data->kind == lm99 && attr->index == 3)
|
|
temp += 16000;
|
|
|
|
return sprintf(buf, "%d\n", temp - temp_from_s8(data->temp_hyst));
|
|
}
|
|
|
|
static ssize_t set_temphyst(struct device *dev, struct device_attribute *dummy,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
long val;
|
|
int err;
|
|
int temp;
|
|
|
|
err = strict_strtol(buf, 10, &val);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
if (data->kind == adt7461)
|
|
temp = temp_from_u8_adt7461(data, data->temp8[2]);
|
|
else if (data->kind == max6646)
|
|
temp = temp_from_u8(data->temp8[2]);
|
|
else
|
|
temp = temp_from_s8(data->temp8[2]);
|
|
|
|
data->temp_hyst = hyst_to_reg(temp - val);
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_TCRIT_HYST,
|
|
data->temp_hyst);
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t show_alarms(struct device *dev, struct device_attribute *dummy,
|
|
char *buf)
|
|
{
|
|
struct lm90_data *data = lm90_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->alarms);
|
|
}
|
|
|
|
static ssize_t show_alarm(struct device *dev, struct device_attribute
|
|
*devattr, char *buf)
|
|
{
|
|
struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
|
|
struct lm90_data *data = lm90_update_device(dev);
|
|
int bitnr = attr->index;
|
|
|
|
return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
|
|
}
|
|
|
|
static ssize_t show_update_interval(struct device *dev,
|
|
struct device_attribute *attr, char *buf)
|
|
{
|
|
struct lm90_data *data = dev_get_drvdata(dev);
|
|
|
|
return sprintf(buf, "%u\n", data->update_interval);
|
|
}
|
|
|
|
static ssize_t set_update_interval(struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
unsigned long val;
|
|
int err;
|
|
|
|
err = strict_strtoul(buf, 10, &val);
|
|
if (err)
|
|
return err;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
lm90_set_convrate(client, data, val);
|
|
mutex_unlock(&data->update_lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp11, NULL, 0, 4);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp11, NULL, 0, 0);
|
|
static SENSOR_DEVICE_ATTR(temp1_min, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp11,
|
|
set_temp11, 0, 1);
|
|
static SENSOR_DEVICE_ATTR(temp1_max, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp11,
|
|
set_temp11, 1, 2);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 2);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 3);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO, show_temphyst,
|
|
set_temphyst, 2);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temphyst, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_offset, S_IWUSR | S_IRUGO, show_temp11,
|
|
set_temp11, 2, 3);
|
|
|
|
/* Individual alarm files */
|
|
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 1);
|
|
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO, show_alarm, NULL, 3);
|
|
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 5);
|
|
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 6);
|
|
/* Raw alarm file for compatibility */
|
|
static DEVICE_ATTR(alarms, S_IRUGO, show_alarms, NULL);
|
|
|
|
static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
|
|
set_update_interval);
|
|
|
|
static struct attribute *lm90_attributes[] = {
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
|
&dev_attr_alarms.attr,
|
|
&dev_attr_update_interval.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm90_group = {
|
|
.attrs = lm90_attributes,
|
|
};
|
|
|
|
/*
|
|
* Additional attributes for devices with emergency sensors
|
|
*/
|
|
static SENSOR_DEVICE_ATTR(temp1_emergency, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 4);
|
|
static SENSOR_DEVICE_ATTR(temp2_emergency, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 5);
|
|
static SENSOR_DEVICE_ATTR(temp1_emergency_hyst, S_IRUGO, show_temphyst,
|
|
NULL, 4);
|
|
static SENSOR_DEVICE_ATTR(temp2_emergency_hyst, S_IRUGO, show_temphyst,
|
|
NULL, 5);
|
|
|
|
static struct attribute *lm90_emergency_attributes[] = {
|
|
&sensor_dev_attr_temp1_emergency.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_emergency.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_emergency_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_emergency_hyst.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm90_emergency_group = {
|
|
.attrs = lm90_emergency_attributes,
|
|
};
|
|
|
|
static SENSOR_DEVICE_ATTR(temp1_emergency_alarm, S_IRUGO, show_alarm, NULL, 15);
|
|
static SENSOR_DEVICE_ATTR(temp2_emergency_alarm, S_IRUGO, show_alarm, NULL, 13);
|
|
|
|
static struct attribute *lm90_emergency_alarm_attributes[] = {
|
|
&sensor_dev_attr_temp1_emergency_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_emergency_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm90_emergency_alarm_group = {
|
|
.attrs = lm90_emergency_alarm_attributes,
|
|
};
|
|
|
|
/*
|
|
* Additional attributes for devices with 3 temperature sensors
|
|
*/
|
|
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp11, NULL, 0, 5);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp11,
|
|
set_temp11, 3, 6);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp11,
|
|
set_temp11, 4, 7);
|
|
static SENSOR_DEVICE_ATTR(temp3_crit, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 6);
|
|
static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temphyst, NULL, 6);
|
|
static SENSOR_DEVICE_ATTR(temp3_emergency, S_IWUSR | S_IRUGO, show_temp8,
|
|
set_temp8, 7);
|
|
static SENSOR_DEVICE_ATTR(temp3_emergency_hyst, S_IRUGO, show_temphyst,
|
|
NULL, 7);
|
|
|
|
static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
|
|
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 10);
|
|
static SENSOR_DEVICE_ATTR(temp3_min_alarm, S_IRUGO, show_alarm, NULL, 11);
|
|
static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 12);
|
|
static SENSOR_DEVICE_ATTR(temp3_emergency_alarm, S_IRUGO, show_alarm, NULL, 14);
|
|
|
|
static struct attribute *lm90_temp3_attributes[] = {
|
|
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_crit_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_emergency.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_emergency_hyst.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp3_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_emergency_alarm.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group lm90_temp3_group = {
|
|
.attrs = lm90_temp3_attributes,
|
|
};
|
|
|
|
/* pec used for ADM1032 only */
|
|
static ssize_t show_pec(struct device *dev, struct device_attribute *dummy,
|
|
char *buf)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
return sprintf(buf, "%d\n", !!(client->flags & I2C_CLIENT_PEC));
|
|
}
|
|
|
|
static ssize_t set_pec(struct device *dev, struct device_attribute *dummy,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct i2c_client *client = to_i2c_client(dev);
|
|
long val;
|
|
int err;
|
|
|
|
err = strict_strtol(buf, 10, &val);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
switch (val) {
|
|
case 0:
|
|
client->flags &= ~I2C_CLIENT_PEC;
|
|
break;
|
|
case 1:
|
|
client->flags |= I2C_CLIENT_PEC;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return count;
|
|
}
|
|
|
|
static DEVICE_ATTR(pec, S_IWUSR | S_IRUGO, show_pec, set_pec);
|
|
|
|
/*
|
|
* Real code
|
|
*/
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int lm90_detect(struct i2c_client *new_client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = new_client->adapter;
|
|
int address = new_client->addr;
|
|
const char *name = NULL;
|
|
int man_id, chip_id, reg_config1, reg_convrate;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* detection and identification */
|
|
if ((man_id = i2c_smbus_read_byte_data(new_client,
|
|
LM90_REG_R_MAN_ID)) < 0
|
|
|| (chip_id = i2c_smbus_read_byte_data(new_client,
|
|
LM90_REG_R_CHIP_ID)) < 0
|
|
|| (reg_config1 = i2c_smbus_read_byte_data(new_client,
|
|
LM90_REG_R_CONFIG1)) < 0
|
|
|| (reg_convrate = i2c_smbus_read_byte_data(new_client,
|
|
LM90_REG_R_CONVRATE)) < 0)
|
|
return -ENODEV;
|
|
|
|
if ((address == 0x4C || address == 0x4D)
|
|
&& man_id == 0x01) { /* National Semiconductor */
|
|
int reg_config2;
|
|
|
|
reg_config2 = i2c_smbus_read_byte_data(new_client,
|
|
LM90_REG_R_CONFIG2);
|
|
if (reg_config2 < 0)
|
|
return -ENODEV;
|
|
|
|
if ((reg_config1 & 0x2A) == 0x00
|
|
&& (reg_config2 & 0xF8) == 0x00
|
|
&& reg_convrate <= 0x09) {
|
|
if (address == 0x4C
|
|
&& (chip_id & 0xF0) == 0x20) { /* LM90 */
|
|
name = "lm90";
|
|
} else
|
|
if ((chip_id & 0xF0) == 0x30) { /* LM89/LM99 */
|
|
name = "lm99";
|
|
dev_info(&adapter->dev,
|
|
"Assuming LM99 chip at 0x%02x\n",
|
|
address);
|
|
dev_info(&adapter->dev,
|
|
"If it is an LM89, instantiate it "
|
|
"with the new_device sysfs "
|
|
"interface\n");
|
|
} else
|
|
if (address == 0x4C
|
|
&& (chip_id & 0xF0) == 0x10) { /* LM86 */
|
|
name = "lm86";
|
|
}
|
|
}
|
|
} else
|
|
if ((address == 0x4C || address == 0x4D)
|
|
&& man_id == 0x41) { /* Analog Devices */
|
|
if ((chip_id & 0xF0) == 0x40 /* ADM1032 */
|
|
&& (reg_config1 & 0x3F) == 0x00
|
|
&& reg_convrate <= 0x0A) {
|
|
name = "adm1032";
|
|
/* The ADM1032 supports PEC, but only if combined
|
|
transactions are not used. */
|
|
if (i2c_check_functionality(adapter,
|
|
I2C_FUNC_SMBUS_BYTE))
|
|
info->flags |= I2C_CLIENT_PEC;
|
|
} else
|
|
if (chip_id == 0x51 /* ADT7461 */
|
|
&& (reg_config1 & 0x1B) == 0x00
|
|
&& reg_convrate <= 0x0A) {
|
|
name = "adt7461";
|
|
} else
|
|
if (chip_id == 0x57 /* ADT7461A, NCT1008 */
|
|
&& (reg_config1 & 0x1B) == 0x00
|
|
&& reg_convrate <= 0x0A) {
|
|
name = "adt7461a";
|
|
}
|
|
} else
|
|
if (man_id == 0x4D) { /* Maxim */
|
|
int reg_emerg, reg_emerg2, reg_status2;
|
|
|
|
/*
|
|
* We read MAX6659_REG_R_REMOTE_EMERG twice, and re-read
|
|
* LM90_REG_R_MAN_ID in between. If MAX6659_REG_R_REMOTE_EMERG
|
|
* exists, both readings will reflect the same value. Otherwise,
|
|
* the readings will be different.
|
|
*/
|
|
if ((reg_emerg = i2c_smbus_read_byte_data(new_client,
|
|
MAX6659_REG_R_REMOTE_EMERG)) < 0
|
|
|| i2c_smbus_read_byte_data(new_client, LM90_REG_R_MAN_ID) < 0
|
|
|| (reg_emerg2 = i2c_smbus_read_byte_data(new_client,
|
|
MAX6659_REG_R_REMOTE_EMERG)) < 0
|
|
|| (reg_status2 = i2c_smbus_read_byte_data(new_client,
|
|
MAX6696_REG_R_STATUS2)) < 0)
|
|
return -ENODEV;
|
|
|
|
/*
|
|
* The MAX6657, MAX6658 and MAX6659 do NOT have a chip_id
|
|
* register. Reading from that address will return the last
|
|
* read value, which in our case is those of the man_id
|
|
* register. Likewise, the config1 register seems to lack a
|
|
* low nibble, so the value will be those of the previous
|
|
* read, so in our case those of the man_id register.
|
|
* MAX6659 has a third set of upper temperature limit registers.
|
|
* Those registers also return values on MAX6657 and MAX6658,
|
|
* thus the only way to detect MAX6659 is by its address.
|
|
* For this reason it will be mis-detected as MAX6657 if its
|
|
* address is 0x4C.
|
|
*/
|
|
if (chip_id == man_id
|
|
&& (address == 0x4C || address == 0x4D || address == 0x4E)
|
|
&& (reg_config1 & 0x1F) == (man_id & 0x0F)
|
|
&& reg_convrate <= 0x09) {
|
|
if (address == 0x4C)
|
|
name = "max6657";
|
|
else
|
|
name = "max6659";
|
|
} else
|
|
/*
|
|
* Even though MAX6695 and MAX6696 do not have a chip ID
|
|
* register, reading it returns 0x01. Bit 4 of the config1
|
|
* register is unused and should return zero when read. Bit 0 of
|
|
* the status2 register is unused and should return zero when
|
|
* read.
|
|
*
|
|
* MAX6695 and MAX6696 have an additional set of temperature
|
|
* limit registers. We can detect those chips by checking if
|
|
* one of those registers exists.
|
|
*/
|
|
if (chip_id == 0x01
|
|
&& (reg_config1 & 0x10) == 0x00
|
|
&& (reg_status2 & 0x01) == 0x00
|
|
&& reg_emerg == reg_emerg2
|
|
&& reg_convrate <= 0x07) {
|
|
name = "max6696";
|
|
} else
|
|
/*
|
|
* The chip_id register of the MAX6680 and MAX6681 holds the
|
|
* revision of the chip. The lowest bit of the config1 register
|
|
* is unused and should return zero when read, so should the
|
|
* second to last bit of config1 (software reset).
|
|
*/
|
|
if (chip_id == 0x01
|
|
&& (reg_config1 & 0x03) == 0x00
|
|
&& reg_convrate <= 0x07) {
|
|
name = "max6680";
|
|
} else
|
|
/*
|
|
* The chip_id register of the MAX6646/6647/6649 holds the
|
|
* revision of the chip. The lowest 6 bits of the config1
|
|
* register are unused and should return zero when read.
|
|
*/
|
|
if (chip_id == 0x59
|
|
&& (reg_config1 & 0x3f) == 0x00
|
|
&& reg_convrate <= 0x07) {
|
|
name = "max6646";
|
|
}
|
|
} else
|
|
if (address == 0x4C
|
|
&& man_id == 0x5C) { /* Winbond/Nuvoton */
|
|
int reg_config2;
|
|
|
|
reg_config2 = i2c_smbus_read_byte_data(new_client,
|
|
LM90_REG_R_CONFIG2);
|
|
if (reg_config2 < 0)
|
|
return -ENODEV;
|
|
|
|
if ((reg_config1 & 0x2A) == 0x00
|
|
&& (reg_config2 & 0xF8) == 0x00) {
|
|
if (chip_id == 0x01 /* W83L771W/G */
|
|
&& reg_convrate <= 0x09) {
|
|
name = "w83l771";
|
|
} else
|
|
if ((chip_id & 0xFE) == 0x10 /* W83L771AWG/ASG */
|
|
&& reg_convrate <= 0x08) {
|
|
name = "w83l771";
|
|
}
|
|
}
|
|
} else
|
|
if (man_id == 0xA1) { /* NXP Semiconductor/Philips */
|
|
if (chip_id == 0x00 && address >= 0x48 && address <= 0x4F) {
|
|
name = "sa56004";
|
|
}
|
|
}
|
|
|
|
if (!name) { /* identification failed */
|
|
dev_dbg(&adapter->dev,
|
|
"Unsupported chip at 0x%02x (man_id=0x%02X, "
|
|
"chip_id=0x%02X)\n", address, man_id, chip_id);
|
|
return -ENODEV;
|
|
}
|
|
|
|
strlcpy(info->type, name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void lm90_remove_files(struct i2c_client *client, struct lm90_data *data)
|
|
{
|
|
if (data->flags & LM90_HAVE_TEMP3)
|
|
sysfs_remove_group(&client->dev.kobj, &lm90_temp3_group);
|
|
if (data->flags & LM90_HAVE_EMERGENCY_ALARM)
|
|
sysfs_remove_group(&client->dev.kobj,
|
|
&lm90_emergency_alarm_group);
|
|
if (data->flags & LM90_HAVE_EMERGENCY)
|
|
sysfs_remove_group(&client->dev.kobj,
|
|
&lm90_emergency_group);
|
|
if (data->flags & LM90_HAVE_OFFSET)
|
|
device_remove_file(&client->dev,
|
|
&sensor_dev_attr_temp2_offset.dev_attr);
|
|
device_remove_file(&client->dev, &dev_attr_pec);
|
|
sysfs_remove_group(&client->dev.kobj, &lm90_group);
|
|
}
|
|
|
|
static void lm90_init_client(struct i2c_client *client)
|
|
{
|
|
u8 config, convrate;
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
|
|
if (lm90_read_reg(client, LM90_REG_R_CONVRATE, &convrate) < 0) {
|
|
dev_warn(&client->dev, "Failed to read convrate register!\n");
|
|
convrate = LM90_DEF_CONVRATE_RVAL;
|
|
}
|
|
data->convrate_orig = convrate;
|
|
|
|
/*
|
|
* Start the conversions.
|
|
*/
|
|
lm90_set_convrate(client, data, 500); /* 500ms; 2Hz conversion rate */
|
|
if (lm90_read_reg(client, LM90_REG_R_CONFIG1, &config) < 0) {
|
|
dev_warn(&client->dev, "Initialization failed!\n");
|
|
return;
|
|
}
|
|
data->config_orig = config;
|
|
|
|
/* Check Temperature Range Select */
|
|
if (data->kind == adt7461) {
|
|
if (config & 0x04)
|
|
data->flags |= LM90_FLAG_ADT7461_EXT;
|
|
}
|
|
|
|
/*
|
|
* Put MAX6680/MAX8881 into extended resolution (bit 0x10,
|
|
* 0.125 degree resolution) and range (0x08, extend range
|
|
* to -64 degree) mode for the remote temperature sensor.
|
|
*/
|
|
if (data->kind == max6680)
|
|
config |= 0x18;
|
|
|
|
/*
|
|
* Select external channel 0 for max6695/96
|
|
*/
|
|
if (data->kind == max6696)
|
|
config &= ~0x08;
|
|
|
|
config &= 0xBF; /* run */
|
|
if (config != data->config_orig) /* Only write if changed */
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1, config);
|
|
}
|
|
|
|
static int lm90_probe(struct i2c_client *new_client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct i2c_adapter *adapter = to_i2c_adapter(new_client->dev.parent);
|
|
struct lm90_data *data;
|
|
int err;
|
|
|
|
data = kzalloc(sizeof(struct lm90_data), GFP_KERNEL);
|
|
if (!data) {
|
|
err = -ENOMEM;
|
|
goto exit;
|
|
}
|
|
i2c_set_clientdata(new_client, data);
|
|
mutex_init(&data->update_lock);
|
|
|
|
/* Set the device type */
|
|
data->kind = id->driver_data;
|
|
if (data->kind == adm1032) {
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE))
|
|
new_client->flags &= ~I2C_CLIENT_PEC;
|
|
}
|
|
|
|
/* Different devices have different alarm bits triggering the
|
|
* ALERT# output */
|
|
data->alert_alarms = lm90_params[data->kind].alert_alarms;
|
|
|
|
/* Set chip capabilities */
|
|
data->flags = lm90_params[data->kind].flags;
|
|
data->reg_local_ext = lm90_params[data->kind].reg_local_ext;
|
|
|
|
/* Set maximum conversion rate */
|
|
data->max_convrate = lm90_params[data->kind].max_convrate;
|
|
|
|
/* Initialize the LM90 chip */
|
|
lm90_init_client(new_client);
|
|
|
|
/* Register sysfs hooks */
|
|
err = sysfs_create_group(&new_client->dev.kobj, &lm90_group);
|
|
if (err)
|
|
goto exit_free;
|
|
if (new_client->flags & I2C_CLIENT_PEC) {
|
|
err = device_create_file(&new_client->dev, &dev_attr_pec);
|
|
if (err)
|
|
goto exit_remove_files;
|
|
}
|
|
if (data->flags & LM90_HAVE_OFFSET) {
|
|
err = device_create_file(&new_client->dev,
|
|
&sensor_dev_attr_temp2_offset.dev_attr);
|
|
if (err)
|
|
goto exit_remove_files;
|
|
}
|
|
if (data->flags & LM90_HAVE_EMERGENCY) {
|
|
err = sysfs_create_group(&new_client->dev.kobj,
|
|
&lm90_emergency_group);
|
|
if (err)
|
|
goto exit_remove_files;
|
|
}
|
|
if (data->flags & LM90_HAVE_EMERGENCY_ALARM) {
|
|
err = sysfs_create_group(&new_client->dev.kobj,
|
|
&lm90_emergency_alarm_group);
|
|
if (err)
|
|
goto exit_remove_files;
|
|
}
|
|
if (data->flags & LM90_HAVE_TEMP3) {
|
|
err = sysfs_create_group(&new_client->dev.kobj,
|
|
&lm90_temp3_group);
|
|
if (err)
|
|
goto exit_remove_files;
|
|
}
|
|
|
|
data->hwmon_dev = hwmon_device_register(&new_client->dev);
|
|
if (IS_ERR(data->hwmon_dev)) {
|
|
err = PTR_ERR(data->hwmon_dev);
|
|
goto exit_remove_files;
|
|
}
|
|
|
|
return 0;
|
|
|
|
exit_remove_files:
|
|
lm90_remove_files(new_client, data);
|
|
exit_free:
|
|
kfree(data);
|
|
exit:
|
|
return err;
|
|
}
|
|
|
|
static int lm90_remove(struct i2c_client *client)
|
|
{
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
|
|
hwmon_device_unregister(data->hwmon_dev);
|
|
lm90_remove_files(client, data);
|
|
|
|
/* Restore initial configuration */
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONVRATE,
|
|
data->convrate_orig);
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
|
|
data->config_orig);
|
|
|
|
kfree(data);
|
|
return 0;
|
|
}
|
|
|
|
static void lm90_alert(struct i2c_client *client, unsigned int flag)
|
|
{
|
|
struct lm90_data *data = i2c_get_clientdata(client);
|
|
u8 config, alarms, alarms2 = 0;
|
|
|
|
lm90_read_reg(client, LM90_REG_R_STATUS, &alarms);
|
|
|
|
if (data->kind == max6696)
|
|
lm90_read_reg(client, MAX6696_REG_R_STATUS2, &alarms2);
|
|
|
|
if ((alarms & 0x7f) == 0 && (alarms2 & 0xfe) == 0) {
|
|
dev_info(&client->dev, "Everything OK\n");
|
|
} else {
|
|
if (alarms & 0x61)
|
|
dev_warn(&client->dev,
|
|
"temp%d out of range, please check!\n", 1);
|
|
if (alarms & 0x1a)
|
|
dev_warn(&client->dev,
|
|
"temp%d out of range, please check!\n", 2);
|
|
if (alarms & 0x04)
|
|
dev_warn(&client->dev,
|
|
"temp%d diode open, please check!\n", 2);
|
|
|
|
if (alarms2 & 0x18)
|
|
dev_warn(&client->dev,
|
|
"temp%d out of range, please check!\n", 3);
|
|
|
|
/* Disable ALERT# output, because these chips don't implement
|
|
SMBus alert correctly; they should only hold the alert line
|
|
low briefly. */
|
|
if ((data->flags & LM90_HAVE_BROKEN_ALERT)
|
|
&& (alarms & data->alert_alarms)) {
|
|
dev_dbg(&client->dev, "Disabling ALERT#\n");
|
|
lm90_read_reg(client, LM90_REG_R_CONFIG1, &config);
|
|
i2c_smbus_write_byte_data(client, LM90_REG_W_CONFIG1,
|
|
config | 0x80);
|
|
}
|
|
}
|
|
}
|
|
|
|
static struct i2c_driver lm90_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "lm90",
|
|
},
|
|
.probe = lm90_probe,
|
|
.remove = lm90_remove,
|
|
.alert = lm90_alert,
|
|
.id_table = lm90_id,
|
|
.detect = lm90_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
static int __init sensors_lm90_init(void)
|
|
{
|
|
return i2c_add_driver(&lm90_driver);
|
|
}
|
|
|
|
static void __exit sensors_lm90_exit(void)
|
|
{
|
|
i2c_del_driver(&lm90_driver);
|
|
}
|
|
|
|
MODULE_AUTHOR("Jean Delvare <khali@linux-fr.org>");
|
|
MODULE_DESCRIPTION("LM90/ADM1032 driver");
|
|
MODULE_LICENSE("GPL");
|
|
|
|
module_init(sensors_lm90_init);
|
|
module_exit(sensors_lm90_exit);
|