hwmon: Driver for Maxim MAX6697 and compatibles
Add support for MAX6581, MAX6602, MAX6622, MAX6636, MAX6689, MAX6693, MAX6694, MAX6697, MAX6698, and MAX6699 temperature sensors Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Guenter Roeck
parent
412e29c135
commit
5372d2d71c
6 changed files with 896 additions and 0 deletions
64
Documentation/devicetree/bindings/i2c/max6697.txt
Normal file
64
Documentation/devicetree/bindings/i2c/max6697.txt
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@ -0,0 +1,64 @@
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max6697 properties
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Required properties:
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- compatible:
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Should be one of
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maxim,max6581
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maxim,max6602
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maxim,max6622
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maxim,max6636
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maxim,max6689
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maxim,max6693
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maxim,max6694
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maxim,max6697
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maxim,max6698
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maxim,max6699
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- reg: I2C address
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Optional properties:
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- smbus-timeout-disable
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Set to disable SMBus timeout. If not specified, SMBus timeout will be
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enabled.
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- extended-range-enable
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Only valid for MAX6581. Set to enable extended temperature range.
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Extended temperature will be disabled if not specified.
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- beta-compensation-enable
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Only valid for MAX6693 and MX6694. Set to enable beta compensation on
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remote temperature channel 1.
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Beta compensation will be disabled if not specified.
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- alert-mask
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Alert bit mask. Alert disabled for bits set.
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Select bit 0 for local temperature, bit 1..7 for remote temperatures.
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If not specified, alert will be enabled for all channels.
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- over-temperature-mask
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Over-temperature bit mask. Over-temperature reporting disabled for
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bits set.
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Select bit 0 for local temperature, bit 1..7 for remote temperatures.
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If not specified, over-temperature reporting will be enabled for all
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channels.
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- resistance-cancellation
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Boolean for all chips other than MAX6581. Set to enable resistance
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cancellation on remote temperature channel 1.
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For MAX6581, resistance cancellation enabled for all channels if
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specified as boolean, otherwise as per bit mask specified.
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Only supported for remote temperatures (bit 1..7).
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If not specified, resistance cancellation will be disabled for all
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channels.
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- transistor-ideality
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For MAX6581 only. Two values; first is bit mask, second is ideality
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select value as per MAX6581 data sheet. Select bit 1..7 for remote
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channels.
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Transistor ideality will be initialized to default (1.008) if not
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specified.
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Example:
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temp-sensor@1a {
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compatible = "maxim,max6697";
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reg = <0x1a>;
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smbus-timeout-disable;
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resistance-cancellation;
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alert-mask = <0x72>;
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over-temperature-mask = <0x7f>;
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};
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58
Documentation/hwmon/max6697
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58
Documentation/hwmon/max6697
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@ -0,0 +1,58 @@
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Kernel driver max6697
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=====================
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Supported chips:
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* Maxim MAX6581
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Prefix: 'max6581'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6581.pdf
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* Maxim MAX6602
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Prefix: 'max6602'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6602.pdf
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* Maxim MAX6622
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Prefix: 'max6622'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6622.pdf
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* Maxim MAX6636
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Prefix: 'max6636'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6636.pdf
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* Maxim MAX6689
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Prefix: 'max6689'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6689.pdf
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* Maxim MAX6693
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Prefix: 'max6693'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6693.pdf
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* Maxim MAX6694
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Prefix: 'max6694'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6694.pdf
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* Maxim MAX6697
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Prefix: 'max6697'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6697.pdf
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* Maxim MAX6698
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Prefix: 'max6698'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6698.pdf
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* Maxim MAX6699
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Prefix: 'max6699'
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Datasheet: http://datasheets.maximintegrated.com/en/ds/MAX6699.pdf
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Author:
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Guenter Roeck <linux@roeck-us.net>
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Description
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-----------
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This driver implements support for several MAX6697 compatible temperature sensor
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chips. The chips support one local temperature sensor plus four, six, or seven
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remote temperature sensors. Remote temperature sensors are diode-connected
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thermal transitors, except for MAX6698 which supports three diode-connected
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thermal transistors plus three thermistors in addition to the local temperature
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sensor.
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The driver provides the following sysfs attributes. temp1 is the local (chip)
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temperature, temp[2..n] are remote temperatures. The actually supported
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per-channel attributes are chip type and channel dependent.
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tempX_input RO temperature
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tempX_max RW temperature maximum threshold
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tempX_max_alarm RO temperature maximum threshold alarm
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tempX_crit RW temperature critical threshold
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tempX_crit_alarm RO temperature critical threshold alarm
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tempX_fault RO temperature diode fault (remote sensors only)
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@ -854,6 +854,17 @@ config SENSORS_MAX6650
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This driver can also be built as a module. If so, the module
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will be called max6650.
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config SENSORS_MAX6697
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tristate "Maxim MAX6697 and compatibles"
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depends on I2C
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help
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If you say yes here you get support for MAX6581, MAX6602, MAX6622,
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MAX6636, MAX6689, MAX6693, MAX6694, MAX6697, MAX6698, and MAX6699
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temperature sensor chips.
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This driver can also be built as a module. If so, the module
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will be called max6697.
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config SENSORS_MCP3021
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tristate "Microchip MCP3021 and compatibles"
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depends on I2C
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@ -99,6 +99,7 @@ obj-$(CONFIG_SENSORS_MAX197) += max197.o
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obj-$(CONFIG_SENSORS_MAX6639) += max6639.o
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obj-$(CONFIG_SENSORS_MAX6642) += max6642.o
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obj-$(CONFIG_SENSORS_MAX6650) += max6650.o
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obj-$(CONFIG_SENSORS_MAX6697) += max6697.o
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obj-$(CONFIG_SENSORS_MC13783_ADC)+= mc13783-adc.o
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obj-$(CONFIG_SENSORS_MCP3021) += mcp3021.o
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obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
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726
drivers/hwmon/max6697.c
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726
drivers/hwmon/max6697.c
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/*
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* Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
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*
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* based on max1668.c
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* Copyright (c) 2011 David George <david.george@ska.ac.za>
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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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#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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#include <linux/of.h>
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#include <linux/platform_data/max6697.h>
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enum chips { max6581, max6602, max6622, max6636, max6689, max6693, max6694,
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max6697, max6698, max6699 };
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/* Report local sensor as temp1 */
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static const u8 MAX6697_REG_TEMP[] = {
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0x07, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x08 };
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static const u8 MAX6697_REG_TEMP_EXT[] = {
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0x57, 0x09, 0x52, 0x53, 0x54, 0x55, 0x56, 0 };
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static const u8 MAX6697_REG_MAX[] = {
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0x17, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x18 };
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static const u8 MAX6697_REG_CRIT[] = {
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0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27 };
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/*
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* Map device tree / platform data register bit map to chip bit map.
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* Applies to alert register and over-temperature register.
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*/
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#define MAX6697_MAP_BITS(reg) ((((reg) & 0x7e) >> 1) | \
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(((reg) & 0x01) << 6) | ((reg) & 0x80))
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#define MAX6697_REG_STAT(n) (0x44 + (n))
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#define MAX6697_REG_CONFIG 0x41
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#define MAX6581_CONF_EXTENDED (1 << 1)
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#define MAX6693_CONF_BETA (1 << 2)
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#define MAX6697_CONF_RESISTANCE (1 << 3)
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#define MAX6697_CONF_TIMEOUT (1 << 5)
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#define MAX6697_REG_ALERT_MASK 0x42
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#define MAX6697_REG_OVERT_MASK 0x43
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#define MAX6581_REG_RESISTANCE 0x4a
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#define MAX6581_REG_IDEALITY 0x4b
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#define MAX6581_REG_IDEALITY_SELECT 0x4c
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#define MAX6581_REG_OFFSET 0x4d
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#define MAX6581_REG_OFFSET_SELECT 0x4e
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#define MAX6697_CONV_TIME 156 /* ms per channel, worst case */
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struct max6697_chip_data {
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int channels;
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u32 have_ext;
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u32 have_crit;
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u32 have_fault;
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u8 valid_conf;
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const u8 *alarm_map;
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};
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struct max6697_data {
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struct device *hwmon_dev;
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enum chips type;
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const struct max6697_chip_data *chip;
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int update_interval; /* in milli-seconds */
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int temp_offset; /* in degrees C */
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struct mutex update_lock;
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unsigned long last_updated; /* In jiffies */
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bool valid; /* true if following fields are valid */
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/* 1x local and up to 7x remote */
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u8 temp[8][4]; /* [nr][0]=temp [1]=ext [2]=max [3]=crit */
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#define MAX6697_TEMP_INPUT 0
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#define MAX6697_TEMP_EXT 1
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#define MAX6697_TEMP_MAX 2
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#define MAX6697_TEMP_CRIT 3
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u32 alarms;
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};
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/* Diode fault status bits on MAX6581 are right shifted by one bit */
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static const u8 max6581_alarm_map[] = {
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0, 0, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13, 14, 15,
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16, 17, 18, 19, 20, 21, 22, 23 };
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static const struct max6697_chip_data max6697_chip_data[] = {
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[max6581] = {
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.channels = 8,
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.have_crit = 0xff,
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.have_ext = 0x7f,
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.have_fault = 0xfe,
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.valid_conf = MAX6581_CONF_EXTENDED | MAX6697_CONF_TIMEOUT,
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.alarm_map = max6581_alarm_map,
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},
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[max6602] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6622] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6636] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6689] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6693] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
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MAX6697_CONF_TIMEOUT,
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},
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[max6694] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6693_CONF_BETA |
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MAX6697_CONF_TIMEOUT,
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},
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[max6697] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x7e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6698] = {
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.channels = 7,
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.have_crit = 0x72,
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.have_ext = 0x02,
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.have_fault = 0x0e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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[max6699] = {
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.channels = 5,
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.have_crit = 0x12,
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.have_ext = 0x02,
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.have_fault = 0x1e,
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.valid_conf = MAX6697_CONF_RESISTANCE | MAX6697_CONF_TIMEOUT,
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},
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};
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static struct max6697_data *max6697_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct max6697_data *data = i2c_get_clientdata(client);
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struct max6697_data *ret = data;
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int val;
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int i;
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u32 alarms;
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mutex_lock(&data->update_lock);
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if (data->valid &&
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!time_after(jiffies, data->last_updated
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+ msecs_to_jiffies(data->update_interval)))
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goto abort;
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for (i = 0; i < data->chip->channels; i++) {
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if (data->chip->have_ext & (1 << i)) {
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val = i2c_smbus_read_byte_data(client,
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MAX6697_REG_TEMP_EXT[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_EXT] = val;
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}
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val = i2c_smbus_read_byte_data(client, MAX6697_REG_TEMP[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_INPUT] = val;
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val = i2c_smbus_read_byte_data(client, MAX6697_REG_MAX[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_MAX] = val;
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if (data->chip->have_crit & (1 << i)) {
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val = i2c_smbus_read_byte_data(client,
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MAX6697_REG_CRIT[i]);
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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data->temp[i][MAX6697_TEMP_CRIT] = val;
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}
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}
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alarms = 0;
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for (i = 0; i < 3; i++) {
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val = i2c_smbus_read_byte_data(client, MAX6697_REG_STAT(i));
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if (unlikely(val < 0)) {
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ret = ERR_PTR(val);
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goto abort;
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}
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alarms = (alarms << 8) | val;
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}
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data->alarms = alarms;
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data->last_updated = jiffies;
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data->valid = true;
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abort:
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mutex_unlock(&data->update_lock);
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return ret;
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}
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static ssize_t show_temp_input(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct max6697_data *data = max6697_update_device(dev);
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int temp;
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if (IS_ERR(data))
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return PTR_ERR(data);
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temp = (data->temp[index][MAX6697_TEMP_INPUT] - data->temp_offset) << 3;
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temp |= data->temp[index][MAX6697_TEMP_EXT] >> 5;
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return sprintf(buf, "%d\n", temp * 125);
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}
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static ssize_t show_temp(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int nr = to_sensor_dev_attr_2(devattr)->nr;
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int index = to_sensor_dev_attr_2(devattr)->index;
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struct max6697_data *data = max6697_update_device(dev);
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int temp;
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if (IS_ERR(data))
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return PTR_ERR(data);
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temp = data->temp[nr][index];
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temp -= data->temp_offset;
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|
||||
return sprintf(buf, "%d\n", temp * 1000);
|
||||
}
|
||||
|
||||
static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
|
||||
char *buf)
|
||||
{
|
||||
int index = to_sensor_dev_attr(attr)->index;
|
||||
struct max6697_data *data = max6697_update_device(dev);
|
||||
|
||||
if (IS_ERR(data))
|
||||
return PTR_ERR(data);
|
||||
|
||||
if (data->chip->alarm_map)
|
||||
index = data->chip->alarm_map[index];
|
||||
|
||||
return sprintf(buf, "%u\n", (data->alarms >> index) & 0x1);
|
||||
}
|
||||
|
||||
static ssize_t set_temp(struct device *dev,
|
||||
struct device_attribute *devattr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
int nr = to_sensor_dev_attr_2(devattr)->nr;
|
||||
int index = to_sensor_dev_attr_2(devattr)->index;
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct max6697_data *data = i2c_get_clientdata(client);
|
||||
long temp;
|
||||
int ret;
|
||||
|
||||
ret = kstrtol(buf, 10, &temp);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
temp = DIV_ROUND_CLOSEST(temp, 1000) + data->temp_offset;
|
||||
temp = clamp_val(temp, 0, data->type == max6581 ? 255 : 127);
|
||||
data->temp[nr][index] = temp;
|
||||
ret = i2c_smbus_write_byte_data(client,
|
||||
index == 2 ? MAX6697_REG_MAX[nr]
|
||||
: MAX6697_REG_CRIT[nr],
|
||||
temp);
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return ret < 0 ? ret : count;
|
||||
}
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_temp_input, NULL, 0);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
0, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
0, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_temp_input, NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
1, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
1, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_temp_input, NULL, 2);
|
||||
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
2, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
2, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_temp_input, NULL, 3);
|
||||
static SENSOR_DEVICE_ATTR_2(temp4_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
3, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp4_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
3, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_temp_input, NULL, 4);
|
||||
static SENSOR_DEVICE_ATTR_2(temp5_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
4, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp5_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
4, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_temp_input, NULL, 5);
|
||||
static SENSOR_DEVICE_ATTR_2(temp6_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
5, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp6_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
5, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_temp_input, NULL, 6);
|
||||
static SENSOR_DEVICE_ATTR_2(temp7_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
6, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp7_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
6, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_temp_input, NULL, 7);
|
||||
static SENSOR_DEVICE_ATTR_2(temp8_max, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
7, MAX6697_TEMP_MAX);
|
||||
static SENSOR_DEVICE_ATTR_2(temp8_crit, S_IRUGO | S_IWUSR, show_temp, set_temp,
|
||||
7, MAX6697_TEMP_CRIT);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 22);
|
||||
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO, show_alarm, NULL, 16);
|
||||
static SENSOR_DEVICE_ATTR(temp3_max_alarm, S_IRUGO, show_alarm, NULL, 17);
|
||||
static SENSOR_DEVICE_ATTR(temp4_max_alarm, S_IRUGO, show_alarm, NULL, 18);
|
||||
static SENSOR_DEVICE_ATTR(temp5_max_alarm, S_IRUGO, show_alarm, NULL, 19);
|
||||
static SENSOR_DEVICE_ATTR(temp6_max_alarm, S_IRUGO, show_alarm, NULL, 20);
|
||||
static SENSOR_DEVICE_ATTR(temp7_max_alarm, S_IRUGO, show_alarm, NULL, 21);
|
||||
static SENSOR_DEVICE_ATTR(temp8_max_alarm, S_IRUGO, show_alarm, NULL, 23);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 14);
|
||||
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO, show_alarm, NULL, 8);
|
||||
static SENSOR_DEVICE_ATTR(temp3_crit_alarm, S_IRUGO, show_alarm, NULL, 9);
|
||||
static SENSOR_DEVICE_ATTR(temp4_crit_alarm, S_IRUGO, show_alarm, NULL, 10);
|
||||
static SENSOR_DEVICE_ATTR(temp5_crit_alarm, S_IRUGO, show_alarm, NULL, 11);
|
||||
static SENSOR_DEVICE_ATTR(temp6_crit_alarm, S_IRUGO, show_alarm, NULL, 12);
|
||||
static SENSOR_DEVICE_ATTR(temp7_crit_alarm, S_IRUGO, show_alarm, NULL, 13);
|
||||
static SENSOR_DEVICE_ATTR(temp8_crit_alarm, S_IRUGO, show_alarm, NULL, 15);
|
||||
|
||||
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO, show_alarm, NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp3_fault, S_IRUGO, show_alarm, NULL, 2);
|
||||
static SENSOR_DEVICE_ATTR(temp4_fault, S_IRUGO, show_alarm, NULL, 3);
|
||||
static SENSOR_DEVICE_ATTR(temp5_fault, S_IRUGO, show_alarm, NULL, 4);
|
||||
static SENSOR_DEVICE_ATTR(temp6_fault, S_IRUGO, show_alarm, NULL, 5);
|
||||
static SENSOR_DEVICE_ATTR(temp7_fault, S_IRUGO, show_alarm, NULL, 6);
|
||||
static SENSOR_DEVICE_ATTR(temp8_fault, S_IRUGO, show_alarm, NULL, 7);
|
||||
|
||||
static struct attribute *max6697_attributes[8][7] = {
|
||||
{
|
||||
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_fault.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp4_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_fault.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp5_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_fault.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp6_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_fault.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp7_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp7_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp7_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp7_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp7_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp7_fault.dev_attr.attr,
|
||||
NULL
|
||||
}, {
|
||||
&sensor_dev_attr_temp8_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp8_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp8_max_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp8_crit.dev_attr.attr,
|
||||
&sensor_dev_attr_temp8_crit_alarm.dev_attr.attr,
|
||||
&sensor_dev_attr_temp8_fault.dev_attr.attr,
|
||||
NULL
|
||||
}
|
||||
};
|
||||
|
||||
static const struct attribute_group max6697_group[8] = {
|
||||
{ .attrs = max6697_attributes[0] },
|
||||
{ .attrs = max6697_attributes[1] },
|
||||
{ .attrs = max6697_attributes[2] },
|
||||
{ .attrs = max6697_attributes[3] },
|
||||
{ .attrs = max6697_attributes[4] },
|
||||
{ .attrs = max6697_attributes[5] },
|
||||
{ .attrs = max6697_attributes[6] },
|
||||
{ .attrs = max6697_attributes[7] },
|
||||
};
|
||||
|
||||
static void max6697_get_config_of(struct device_node *node,
|
||||
struct max6697_platform_data *pdata)
|
||||
{
|
||||
int len;
|
||||
const __be32 *prop;
|
||||
|
||||
prop = of_get_property(node, "smbus-timeout-disable", &len);
|
||||
if (prop)
|
||||
pdata->smbus_timeout_disable = true;
|
||||
prop = of_get_property(node, "extended-range-enable", &len);
|
||||
if (prop)
|
||||
pdata->extended_range_enable = true;
|
||||
prop = of_get_property(node, "beta-compensation-enable", &len);
|
||||
if (prop)
|
||||
pdata->beta_compensation = true;
|
||||
prop = of_get_property(node, "alert-mask", &len);
|
||||
if (prop && len == sizeof(u32))
|
||||
pdata->alert_mask = be32_to_cpu(prop[0]);
|
||||
prop = of_get_property(node, "over-temperature-mask", &len);
|
||||
if (prop && len == sizeof(u32))
|
||||
pdata->over_temperature_mask = be32_to_cpu(prop[0]);
|
||||
prop = of_get_property(node, "resistance-cancellation", &len);
|
||||
if (prop) {
|
||||
if (len == sizeof(u32))
|
||||
pdata->resistance_cancellation = be32_to_cpu(prop[0]);
|
||||
else
|
||||
pdata->resistance_cancellation = 0xfe;
|
||||
}
|
||||
prop = of_get_property(node, "transistor-ideality", &len);
|
||||
if (prop && len == 2 * sizeof(u32)) {
|
||||
pdata->ideality_mask = be32_to_cpu(prop[0]);
|
||||
pdata->ideality_value = be32_to_cpu(prop[1]);
|
||||
}
|
||||
}
|
||||
|
||||
static int max6697_init_chip(struct i2c_client *client)
|
||||
{
|
||||
struct max6697_data *data = i2c_get_clientdata(client);
|
||||
struct max6697_platform_data *pdata = dev_get_platdata(&client->dev);
|
||||
struct max6697_platform_data p;
|
||||
const struct max6697_chip_data *chip = data->chip;
|
||||
int factor = chip->channels;
|
||||
int ret, reg;
|
||||
|
||||
/*
|
||||
* Don't touch configuration if neither platform data nor OF
|
||||
* configuration was specified. If that is the case, use the
|
||||
* current chip configuration.
|
||||
*/
|
||||
if (!pdata && !client->dev.of_node) {
|
||||
reg = i2c_smbus_read_byte_data(client, MAX6697_REG_CONFIG);
|
||||
if (reg < 0)
|
||||
return reg;
|
||||
if (data->type == max6581) {
|
||||
if (reg & MAX6581_CONF_EXTENDED)
|
||||
data->temp_offset = 64;
|
||||
reg = i2c_smbus_read_byte_data(client,
|
||||
MAX6581_REG_RESISTANCE);
|
||||
if (reg < 0)
|
||||
return reg;
|
||||
factor += hweight8(reg);
|
||||
} else {
|
||||
if (reg & MAX6697_CONF_RESISTANCE)
|
||||
factor++;
|
||||
}
|
||||
goto done;
|
||||
}
|
||||
|
||||
if (client->dev.of_node) {
|
||||
memset(&p, 0, sizeof(p));
|
||||
max6697_get_config_of(client->dev.of_node, &p);
|
||||
pdata = &p;
|
||||
}
|
||||
|
||||
reg = 0;
|
||||
if (pdata->smbus_timeout_disable &&
|
||||
(chip->valid_conf & MAX6697_CONF_TIMEOUT)) {
|
||||
reg |= MAX6697_CONF_TIMEOUT;
|
||||
}
|
||||
if (pdata->extended_range_enable &&
|
||||
(chip->valid_conf & MAX6581_CONF_EXTENDED)) {
|
||||
reg |= MAX6581_CONF_EXTENDED;
|
||||
data->temp_offset = 64;
|
||||
}
|
||||
if (pdata->resistance_cancellation &&
|
||||
(chip->valid_conf & MAX6697_CONF_RESISTANCE)) {
|
||||
reg |= MAX6697_CONF_RESISTANCE;
|
||||
factor++;
|
||||
}
|
||||
if (pdata->beta_compensation &&
|
||||
(chip->valid_conf & MAX6693_CONF_BETA)) {
|
||||
reg |= MAX6693_CONF_BETA;
|
||||
}
|
||||
|
||||
ret = i2c_smbus_write_byte_data(client, MAX6697_REG_CONFIG, reg);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = i2c_smbus_write_byte_data(client, MAX6697_REG_ALERT_MASK,
|
||||
MAX6697_MAP_BITS(pdata->alert_mask));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = i2c_smbus_write_byte_data(client, MAX6697_REG_OVERT_MASK,
|
||||
MAX6697_MAP_BITS(pdata->over_temperature_mask));
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (data->type == max6581) {
|
||||
factor += hweight8(pdata->resistance_cancellation >> 1);
|
||||
ret = i2c_smbus_write_byte_data(client, MAX6581_REG_RESISTANCE,
|
||||
pdata->resistance_cancellation >> 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
ret = i2c_smbus_write_byte_data(client, MAX6581_REG_IDEALITY,
|
||||
pdata->ideality_mask >> 1);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
ret = i2c_smbus_write_byte_data(client,
|
||||
MAX6581_REG_IDEALITY_SELECT,
|
||||
pdata->ideality_value);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
}
|
||||
done:
|
||||
data->update_interval = factor * MAX6697_CONV_TIME;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void max6697_remove_files(struct i2c_client *client)
|
||||
{
|
||||
int i;
|
||||
|
||||
for (i = 0; i < ARRAY_SIZE(max6697_group); i++)
|
||||
sysfs_remove_group(&client->dev.kobj, &max6697_group[i]);
|
||||
}
|
||||
|
||||
static int max6697_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct i2c_adapter *adapter = client->adapter;
|
||||
struct device *dev = &client->dev;
|
||||
struct max6697_data *data;
|
||||
int i, err;
|
||||
|
||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
||||
return -ENODEV;
|
||||
|
||||
data = devm_kzalloc(dev, sizeof(struct max6697_data), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->type = id->driver_data;
|
||||
data->chip = &max6697_chip_data[data->type];
|
||||
|
||||
i2c_set_clientdata(client, data);
|
||||
mutex_init(&data->update_lock);
|
||||
|
||||
err = max6697_init_chip(client);
|
||||
if (err)
|
||||
return err;
|
||||
|
||||
for (i = 0; i < data->chip->channels; i++) {
|
||||
err = sysfs_create_file(&dev->kobj,
|
||||
max6697_attributes[i][0]);
|
||||
if (err)
|
||||
goto error;
|
||||
err = sysfs_create_file(&dev->kobj,
|
||||
max6697_attributes[i][1]);
|
||||
if (err)
|
||||
goto error;
|
||||
err = sysfs_create_file(&dev->kobj,
|
||||
max6697_attributes[i][2]);
|
||||
if (err)
|
||||
goto error;
|
||||
|
||||
if (data->chip->have_crit & (1 << i)) {
|
||||
err = sysfs_create_file(&dev->kobj,
|
||||
max6697_attributes[i][3]);
|
||||
if (err)
|
||||
goto error;
|
||||
err = sysfs_create_file(&dev->kobj,
|
||||
max6697_attributes[i][4]);
|
||||
if (err)
|
||||
goto error;
|
||||
}
|
||||
if (data->chip->have_fault & (1 << i)) {
|
||||
err = sysfs_create_file(&dev->kobj,
|
||||
max6697_attributes[i][5]);
|
||||
if (err)
|
||||
goto error;
|
||||
}
|
||||
}
|
||||
|
||||
data->hwmon_dev = hwmon_device_register(dev);
|
||||
if (IS_ERR(data->hwmon_dev)) {
|
||||
err = PTR_ERR(data->hwmon_dev);
|
||||
goto error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
error:
|
||||
max6697_remove_files(client);
|
||||
return err;
|
||||
}
|
||||
|
||||
static int max6697_remove(struct i2c_client *client)
|
||||
{
|
||||
struct max6697_data *data = i2c_get_clientdata(client);
|
||||
|
||||
hwmon_device_unregister(data->hwmon_dev);
|
||||
max6697_remove_files(client);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct i2c_device_id max6697_id[] = {
|
||||
{ "max6581", max6581 },
|
||||
{ "max6602", max6602 },
|
||||
{ "max6622", max6622 },
|
||||
{ "max6636", max6636 },
|
||||
{ "max6689", max6689 },
|
||||
{ "max6693", max6693 },
|
||||
{ "max6694", max6694 },
|
||||
{ "max6697", max6697 },
|
||||
{ "max6698", max6698 },
|
||||
{ "max6699", max6699 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, max6697_id);
|
||||
|
||||
static struct i2c_driver max6697_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "max6697",
|
||||
},
|
||||
.probe = max6697_probe,
|
||||
.remove = max6697_remove,
|
||||
.id_table = max6697_id,
|
||||
};
|
||||
|
||||
module_i2c_driver(max6697_driver);
|
||||
|
||||
MODULE_AUTHOR("Guenter Roeck <linux@roeck-us.net>");
|
||||
MODULE_DESCRIPTION("MAX6697 temperature sensor driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
36
include/linux/platform_data/max6697.h
Normal file
36
include/linux/platform_data/max6697.h
Normal file
|
|
@ -0,0 +1,36 @@
|
|||
/*
|
||||
* max6697.h
|
||||
* Copyright (c) 2012 Guenter Roeck <linux@roeck-us.net>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef MAX6697_H
|
||||
#define MAX6697_H
|
||||
|
||||
#include <linux/types.h>
|
||||
|
||||
/*
|
||||
* For all bit masks:
|
||||
* bit 0: local temperature
|
||||
* bit 1..7: remote temperatures
|
||||
*/
|
||||
struct max6697_platform_data {
|
||||
bool smbus_timeout_disable; /* set to disable SMBus timeouts */
|
||||
bool extended_range_enable; /* set to enable extended temp range */
|
||||
bool beta_compensation; /* set to enable beta compensation */
|
||||
u8 alert_mask; /* set bit to 1 to disable alert */
|
||||
u8 over_temperature_mask; /* set bit to 1 to disable */
|
||||
u8 resistance_cancellation; /* set bit to 0 to disable
|
||||
* bit mask for MAX6581,
|
||||
* boolean for other chips
|
||||
*/
|
||||
u8 ideality_mask; /* set bit to 0 to disable */
|
||||
u8 ideality_value; /* transistor ideality as per
|
||||
* MAX6581 datasheet
|
||||
*/
|
||||
};
|
||||
|
||||
#endif /* MAX6697_H */
|
||||
Loading…
Reference in a new issue