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f3643ac7ff
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
762 lines
21 KiB
C
762 lines
21 KiB
C
/* tmp401.c
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*
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* Copyright (C) 2007,2008 Hans de Goede <hdegoede@redhat.com>
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* Preliminary tmp411 support by:
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* Gabriel Konat, Sander Leget, Wouter Willems
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* Copyright (C) 2009 Andre Prendel <andre.prendel@gmx.de>
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*
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* Cleanup and support for TMP431 and TMP432 by Guenter Roeck
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* Copyright (c) 2013 Guenter Roeck <linux@roeck-us.net>
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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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/*
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* Driver for the Texas Instruments TMP401 SMBUS temperature sensor IC.
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*
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* Note this IC is in some aspect similar to the LM90, but it has quite a
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* few differences too, for example the local temp has a higher resolution
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* and thus has 16 bits registers for its value and limit instead of 8 bits.
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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/bitops.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/sysfs.h>
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/* Addresses to scan */
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static const unsigned short normal_i2c[] = { 0x4c, 0x4d, 0x4e, I2C_CLIENT_END };
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enum chips { tmp401, tmp411, tmp431, tmp432 };
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/*
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* The TMP401 registers, note some registers have different addresses for
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* reading and writing
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*/
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#define TMP401_STATUS 0x02
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#define TMP401_CONFIG_READ 0x03
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#define TMP401_CONFIG_WRITE 0x09
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#define TMP401_CONVERSION_RATE_READ 0x04
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#define TMP401_CONVERSION_RATE_WRITE 0x0A
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#define TMP401_TEMP_CRIT_HYST 0x21
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#define TMP401_MANUFACTURER_ID_REG 0xFE
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#define TMP401_DEVICE_ID_REG 0xFF
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static const u8 TMP401_TEMP_MSB_READ[6][2] = {
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{ 0x00, 0x01 }, /* temp */
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{ 0x06, 0x08 }, /* low limit */
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{ 0x05, 0x07 }, /* high limit */
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{ 0x20, 0x19 }, /* therm (crit) limit */
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{ 0x30, 0x34 }, /* lowest */
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{ 0x32, 0x36 }, /* highest */
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};
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static const u8 TMP401_TEMP_MSB_WRITE[6][2] = {
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{ 0, 0 }, /* temp (unused) */
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{ 0x0C, 0x0E }, /* low limit */
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{ 0x0B, 0x0D }, /* high limit */
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{ 0x20, 0x19 }, /* therm (crit) limit */
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{ 0x30, 0x34 }, /* lowest */
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{ 0x32, 0x36 }, /* highest */
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};
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static const u8 TMP401_TEMP_LSB[6][2] = {
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{ 0x15, 0x10 }, /* temp */
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{ 0x17, 0x14 }, /* low limit */
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{ 0x16, 0x13 }, /* high limit */
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{ 0, 0 }, /* therm (crit) limit (unused) */
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{ 0x31, 0x35 }, /* lowest */
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{ 0x33, 0x37 }, /* highest */
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};
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static const u8 TMP432_TEMP_MSB_READ[4][3] = {
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{ 0x00, 0x01, 0x23 }, /* temp */
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{ 0x06, 0x08, 0x16 }, /* low limit */
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{ 0x05, 0x07, 0x15 }, /* high limit */
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{ 0x20, 0x19, 0x1A }, /* therm (crit) limit */
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};
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static const u8 TMP432_TEMP_MSB_WRITE[4][3] = {
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{ 0, 0, 0 }, /* temp - unused */
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{ 0x0C, 0x0E, 0x16 }, /* low limit */
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{ 0x0B, 0x0D, 0x15 }, /* high limit */
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{ 0x20, 0x19, 0x1A }, /* therm (crit) limit */
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};
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static const u8 TMP432_TEMP_LSB[3][3] = {
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{ 0x29, 0x10, 0x24 }, /* temp */
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{ 0x3E, 0x14, 0x18 }, /* low limit */
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{ 0x3D, 0x13, 0x17 }, /* high limit */
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};
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/* [0] = fault, [1] = low, [2] = high, [3] = therm/crit */
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static const u8 TMP432_STATUS_REG[] = {
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0x1b, 0x36, 0x35, 0x37 };
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/* Flags */
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#define TMP401_CONFIG_RANGE BIT(2)
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#define TMP401_CONFIG_SHUTDOWN BIT(6)
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#define TMP401_STATUS_LOCAL_CRIT BIT(0)
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#define TMP401_STATUS_REMOTE_CRIT BIT(1)
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#define TMP401_STATUS_REMOTE_OPEN BIT(2)
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#define TMP401_STATUS_REMOTE_LOW BIT(3)
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#define TMP401_STATUS_REMOTE_HIGH BIT(4)
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#define TMP401_STATUS_LOCAL_LOW BIT(5)
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#define TMP401_STATUS_LOCAL_HIGH BIT(6)
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/* On TMP432, each status has its own register */
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#define TMP432_STATUS_LOCAL BIT(0)
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#define TMP432_STATUS_REMOTE1 BIT(1)
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#define TMP432_STATUS_REMOTE2 BIT(2)
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/* Manufacturer / Device ID's */
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#define TMP401_MANUFACTURER_ID 0x55
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#define TMP401_DEVICE_ID 0x11
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#define TMP411A_DEVICE_ID 0x12
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#define TMP411B_DEVICE_ID 0x13
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#define TMP411C_DEVICE_ID 0x10
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#define TMP431_DEVICE_ID 0x31
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#define TMP432_DEVICE_ID 0x32
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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 tmp401_id[] = {
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{ "tmp401", tmp401 },
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{ "tmp411", tmp411 },
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{ "tmp431", tmp431 },
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{ "tmp432", tmp432 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, tmp401_id);
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/*
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* Client data (each client gets its own)
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*/
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struct tmp401_data {
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struct i2c_client *client;
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const struct attribute_group *groups[3];
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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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enum chips kind;
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unsigned int update_interval; /* in milliseconds */
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/* register values */
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u8 status[4];
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u8 config;
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u16 temp[6][3];
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u8 temp_crit_hyst;
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};
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/*
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* Sysfs attr show / store functions
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*/
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static int tmp401_register_to_temp(u16 reg, u8 config)
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{
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int temp = reg;
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if (config & TMP401_CONFIG_RANGE)
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temp -= 64 * 256;
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return DIV_ROUND_CLOSEST(temp * 125, 32);
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}
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static u16 tmp401_temp_to_register(long temp, u8 config, int zbits)
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{
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if (config & TMP401_CONFIG_RANGE) {
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temp = clamp_val(temp, -64000, 191000);
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temp += 64000;
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} else
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temp = clamp_val(temp, 0, 127000);
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return DIV_ROUND_CLOSEST(temp * (1 << (8 - zbits)), 1000) << zbits;
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}
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static int tmp401_update_device_reg16(struct i2c_client *client,
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struct tmp401_data *data)
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{
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int i, j, val;
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int num_regs = data->kind == tmp411 ? 6 : 4;
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int num_sensors = data->kind == tmp432 ? 3 : 2;
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for (i = 0; i < num_sensors; i++) { /* local / r1 / r2 */
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for (j = 0; j < num_regs; j++) { /* temp / low / ... */
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u8 regaddr;
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/*
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* High byte must be read first immediately followed
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* by the low byte
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*/
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regaddr = data->kind == tmp432 ?
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TMP432_TEMP_MSB_READ[j][i] :
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TMP401_TEMP_MSB_READ[j][i];
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val = i2c_smbus_read_byte_data(client, regaddr);
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if (val < 0)
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return val;
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data->temp[j][i] = val << 8;
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if (j == 3) /* crit is msb only */
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continue;
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regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[j][i]
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: TMP401_TEMP_LSB[j][i];
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val = i2c_smbus_read_byte_data(client, regaddr);
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if (val < 0)
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return val;
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data->temp[j][i] |= val;
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}
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}
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return 0;
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}
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static struct tmp401_data *tmp401_update_device(struct device *dev)
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{
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struct tmp401_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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struct tmp401_data *ret = data;
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int i, val;
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unsigned long next_update;
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mutex_lock(&data->update_lock);
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next_update = data->last_updated +
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msecs_to_jiffies(data->update_interval);
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if (time_after(jiffies, next_update) || !data->valid) {
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if (data->kind != tmp432) {
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/*
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* The driver uses the TMP432 status format internally.
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* Convert status to TMP432 format for other chips.
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*/
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val = i2c_smbus_read_byte_data(client, TMP401_STATUS);
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if (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->status[0] =
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(val & TMP401_STATUS_REMOTE_OPEN) >> 1;
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data->status[1] =
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((val & TMP401_STATUS_REMOTE_LOW) >> 2) |
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((val & TMP401_STATUS_LOCAL_LOW) >> 5);
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data->status[2] =
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((val & TMP401_STATUS_REMOTE_HIGH) >> 3) |
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((val & TMP401_STATUS_LOCAL_HIGH) >> 6);
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data->status[3] = val & (TMP401_STATUS_LOCAL_CRIT
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| TMP401_STATUS_REMOTE_CRIT);
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} else {
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for (i = 0; i < ARRAY_SIZE(data->status); i++) {
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val = i2c_smbus_read_byte_data(client,
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TMP432_STATUS_REG[i]);
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if (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->status[i] = val;
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}
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}
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val = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
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if (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->config = val;
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val = tmp401_update_device_reg16(client, data);
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if (val < 0) {
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ret = ERR_PTR(val);
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goto abort;
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}
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val = i2c_smbus_read_byte_data(client, TMP401_TEMP_CRIT_HYST);
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if (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_crit_hyst = val;
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data->last_updated = jiffies;
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data->valid = 1;
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}
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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(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 tmp401_data *data = tmp401_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n",
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tmp401_register_to_temp(data->temp[nr][index], data->config));
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}
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static ssize_t show_temp_crit_hyst(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int temp, index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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mutex_lock(&data->update_lock);
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temp = tmp401_register_to_temp(data->temp[3][index], data->config);
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temp -= data->temp_crit_hyst * 1000;
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mutex_unlock(&data->update_lock);
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return sprintf(buf, "%d\n", temp);
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}
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static ssize_t show_status(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 mask = to_sensor_dev_attr_2(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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if (IS_ERR(data))
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return PTR_ERR(data);
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return sprintf(buf, "%d\n", !!(data->status[nr] & mask));
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}
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static ssize_t store_temp(struct device *dev, struct device_attribute *devattr,
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const char *buf, size_t count)
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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 tmp401_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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u16 reg;
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u8 regaddr;
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
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reg = tmp401_temp_to_register(val, data->config, nr == 3 ? 8 : 4);
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mutex_lock(&data->update_lock);
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regaddr = data->kind == tmp432 ? TMP432_TEMP_MSB_WRITE[nr][index]
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: TMP401_TEMP_MSB_WRITE[nr][index];
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i2c_smbus_write_byte_data(client, regaddr, reg >> 8);
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if (nr != 3) {
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regaddr = data->kind == tmp432 ? TMP432_TEMP_LSB[nr][index]
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: TMP401_TEMP_LSB[nr][index];
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i2c_smbus_write_byte_data(client, regaddr, reg & 0xFF);
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}
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data->temp[nr][index] = reg;
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t store_temp_crit_hyst(struct device *dev, struct device_attribute
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*devattr, const char *buf, size_t count)
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{
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int temp, index = to_sensor_dev_attr(devattr)->index;
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struct tmp401_data *data = tmp401_update_device(dev);
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long val;
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u8 reg;
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if (IS_ERR(data))
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return PTR_ERR(data);
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
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if (data->config & TMP401_CONFIG_RANGE)
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val = clamp_val(val, -64000, 191000);
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else
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val = clamp_val(val, 0, 127000);
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mutex_lock(&data->update_lock);
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temp = tmp401_register_to_temp(data->temp[3][index], data->config);
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val = clamp_val(val, temp - 255000, temp);
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reg = ((temp - val) + 500) / 1000;
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i2c_smbus_write_byte_data(data->client, TMP401_TEMP_CRIT_HYST,
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reg);
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data->temp_crit_hyst = reg;
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mutex_unlock(&data->update_lock);
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return count;
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}
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/*
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* Resets the historical measurements of minimum and maximum temperatures.
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* This is done by writing any value to any of the minimum/maximum registers
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* (0x30-0x37).
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*/
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static ssize_t reset_temp_history(struct device *dev,
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struct device_attribute *devattr, const char *buf, size_t count)
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{
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struct tmp401_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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long val;
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if (kstrtol(buf, 10, &val))
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return -EINVAL;
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if (val != 1) {
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dev_err(dev,
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"temp_reset_history value %ld not supported. Use 1 to reset the history!\n",
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val);
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return -EINVAL;
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}
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(client, TMP401_TEMP_MSB_WRITE[5][0], val);
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data->valid = 0;
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mutex_unlock(&data->update_lock);
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return count;
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}
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static ssize_t show_update_interval(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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struct tmp401_data *data = dev_get_drvdata(dev);
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return sprintf(buf, "%u\n", data->update_interval);
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}
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static ssize_t set_update_interval(struct device *dev,
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struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct tmp401_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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unsigned long val;
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int err, rate;
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err = kstrtoul(buf, 10, &val);
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if (err)
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return err;
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/*
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* For valid rates, interval can be calculated as
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* interval = (1 << (7 - rate)) * 125;
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* Rounded rate is therefore
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* rate = 7 - __fls(interval * 4 / (125 * 3));
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* Use clamp_val() to avoid overflows, and to ensure valid input
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* for __fls.
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*/
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val = clamp_val(val, 125, 16000);
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rate = 7 - __fls(val * 4 / (125 * 3));
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mutex_lock(&data->update_lock);
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i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, rate);
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data->update_interval = (1 << (7 - rate)) * 125;
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mutex_unlock(&data->update_lock);
|
|
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_2(temp1_input, S_IRUGO, show_temp, NULL, 0, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_min, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 1, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_max, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 2, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 3, 0);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit_hyst, S_IWUSR | S_IRUGO,
|
|
show_temp_crit_hyst, store_temp_crit_hyst, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_min_alarm, S_IRUGO, show_status, NULL,
|
|
1, TMP432_STATUS_LOCAL);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_max_alarm, S_IRUGO, show_status, NULL,
|
|
2, TMP432_STATUS_LOCAL);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_crit_alarm, S_IRUGO, show_status, NULL,
|
|
3, TMP432_STATUS_LOCAL);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, 0, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_min, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 1, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_max, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 2, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 3, 1);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit_hyst, S_IRUGO, show_temp_crit_hyst,
|
|
NULL, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_fault, S_IRUGO, show_status, NULL,
|
|
0, TMP432_STATUS_REMOTE1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_min_alarm, S_IRUGO, show_status, NULL,
|
|
1, TMP432_STATUS_REMOTE1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_max_alarm, S_IRUGO, show_status, NULL,
|
|
2, TMP432_STATUS_REMOTE1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_crit_alarm, S_IRUGO, show_status, NULL,
|
|
3, TMP432_STATUS_REMOTE1);
|
|
|
|
static DEVICE_ATTR(update_interval, S_IRUGO | S_IWUSR, show_update_interval,
|
|
set_update_interval);
|
|
|
|
static struct attribute *tmp401_attributes[] = {
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_crit_alarm.dev_attr.attr,
|
|
|
|
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_hyst.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
|
|
|
|
&dev_attr_update_interval.attr,
|
|
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group tmp401_group = {
|
|
.attrs = tmp401_attributes,
|
|
};
|
|
|
|
/*
|
|
* Additional features of the TMP411 chip.
|
|
* The TMP411 stores the minimum and maximum
|
|
* temperature measured since power-on, chip-reset, or
|
|
* minimum and maximum register reset for both the local
|
|
* and remote channels.
|
|
*/
|
|
static SENSOR_DEVICE_ATTR_2(temp1_lowest, S_IRUGO, show_temp, NULL, 4, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_highest, S_IRUGO, show_temp, NULL, 5, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_lowest, S_IRUGO, show_temp, NULL, 4, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_highest, S_IRUGO, show_temp, NULL, 5, 1);
|
|
static SENSOR_DEVICE_ATTR(temp_reset_history, S_IWUSR, NULL, reset_temp_history,
|
|
0);
|
|
|
|
static struct attribute *tmp411_attributes[] = {
|
|
&sensor_dev_attr_temp1_highest.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_lowest.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_highest.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_lowest.dev_attr.attr,
|
|
&sensor_dev_attr_temp_reset_history.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group tmp411_group = {
|
|
.attrs = tmp411_attributes,
|
|
};
|
|
|
|
static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, 0, 2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_min, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 1, 2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_max, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 2, 2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IWUSR | S_IRUGO, show_temp,
|
|
store_temp, 3, 2);
|
|
static SENSOR_DEVICE_ATTR(temp3_crit_hyst, S_IRUGO, show_temp_crit_hyst,
|
|
NULL, 2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_status, NULL,
|
|
0, TMP432_STATUS_REMOTE2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_min_alarm, S_IRUGO, show_status, NULL,
|
|
1, TMP432_STATUS_REMOTE2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_max_alarm, S_IRUGO, show_status, NULL,
|
|
2, TMP432_STATUS_REMOTE2);
|
|
static SENSOR_DEVICE_ATTR_2(temp3_crit_alarm, S_IRUGO, show_status, NULL,
|
|
3, TMP432_STATUS_REMOTE2);
|
|
|
|
static struct attribute *tmp432_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_fault.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp3_crit_alarm.dev_attr.attr,
|
|
|
|
NULL
|
|
};
|
|
|
|
static const struct attribute_group tmp432_group = {
|
|
.attrs = tmp432_attributes,
|
|
};
|
|
|
|
/*
|
|
* Begin non sysfs callback code (aka Real code)
|
|
*/
|
|
|
|
static void tmp401_init_client(struct tmp401_data *data,
|
|
struct i2c_client *client)
|
|
{
|
|
int config, config_orig;
|
|
|
|
/* Set the conversion rate to 2 Hz */
|
|
i2c_smbus_write_byte_data(client, TMP401_CONVERSION_RATE_WRITE, 5);
|
|
data->update_interval = 500;
|
|
|
|
/* Start conversions (disable shutdown if necessary) */
|
|
config = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
|
|
if (config < 0) {
|
|
dev_warn(&client->dev, "Initialization failed!\n");
|
|
return;
|
|
}
|
|
|
|
config_orig = config;
|
|
config &= ~TMP401_CONFIG_SHUTDOWN;
|
|
|
|
if (config != config_orig)
|
|
i2c_smbus_write_byte_data(client, TMP401_CONFIG_WRITE, config);
|
|
}
|
|
|
|
static int tmp401_detect(struct i2c_client *client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
enum chips kind;
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
u8 reg;
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -ENODEV;
|
|
|
|
/* Detect and identify the chip */
|
|
reg = i2c_smbus_read_byte_data(client, TMP401_MANUFACTURER_ID_REG);
|
|
if (reg != TMP401_MANUFACTURER_ID)
|
|
return -ENODEV;
|
|
|
|
reg = i2c_smbus_read_byte_data(client, TMP401_DEVICE_ID_REG);
|
|
|
|
switch (reg) {
|
|
case TMP401_DEVICE_ID:
|
|
if (client->addr != 0x4c)
|
|
return -ENODEV;
|
|
kind = tmp401;
|
|
break;
|
|
case TMP411A_DEVICE_ID:
|
|
if (client->addr != 0x4c)
|
|
return -ENODEV;
|
|
kind = tmp411;
|
|
break;
|
|
case TMP411B_DEVICE_ID:
|
|
if (client->addr != 0x4d)
|
|
return -ENODEV;
|
|
kind = tmp411;
|
|
break;
|
|
case TMP411C_DEVICE_ID:
|
|
if (client->addr != 0x4e)
|
|
return -ENODEV;
|
|
kind = tmp411;
|
|
break;
|
|
case TMP431_DEVICE_ID:
|
|
if (client->addr == 0x4e)
|
|
return -ENODEV;
|
|
kind = tmp431;
|
|
break;
|
|
case TMP432_DEVICE_ID:
|
|
if (client->addr == 0x4e)
|
|
return -ENODEV;
|
|
kind = tmp432;
|
|
break;
|
|
default:
|
|
return -ENODEV;
|
|
}
|
|
|
|
reg = i2c_smbus_read_byte_data(client, TMP401_CONFIG_READ);
|
|
if (reg & 0x1b)
|
|
return -ENODEV;
|
|
|
|
reg = i2c_smbus_read_byte_data(client, TMP401_CONVERSION_RATE_READ);
|
|
/* Datasheet says: 0x1-0x6 */
|
|
if (reg > 15)
|
|
return -ENODEV;
|
|
|
|
strlcpy(info->type, tmp401_id[kind].name, I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int tmp401_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
const char *names[] = { "TMP401", "TMP411", "TMP431", "TMP432" };
|
|
struct device *dev = &client->dev;
|
|
struct device *hwmon_dev;
|
|
struct tmp401_data *data;
|
|
int groups = 0;
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct tmp401_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->client = client;
|
|
mutex_init(&data->update_lock);
|
|
data->kind = id->driver_data;
|
|
|
|
/* Initialize the TMP401 chip */
|
|
tmp401_init_client(data, client);
|
|
|
|
/* Register sysfs hooks */
|
|
data->groups[groups++] = &tmp401_group;
|
|
|
|
/* Register additional tmp411 sysfs hooks */
|
|
if (data->kind == tmp411)
|
|
data->groups[groups++] = &tmp411_group;
|
|
|
|
/* Register additional tmp432 sysfs hooks */
|
|
if (data->kind == tmp432)
|
|
data->groups[groups++] = &tmp432_group;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
|
data, data->groups);
|
|
if (IS_ERR(hwmon_dev))
|
|
return PTR_ERR(hwmon_dev);
|
|
|
|
dev_info(dev, "Detected TI %s chip\n", names[data->kind]);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct i2c_driver tmp401_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "tmp401",
|
|
},
|
|
.probe = tmp401_probe,
|
|
.id_table = tmp401_id,
|
|
.detect = tmp401_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(tmp401_driver);
|
|
|
|
MODULE_AUTHOR("Hans de Goede <hdegoede@redhat.com>");
|
|
MODULE_DESCRIPTION("Texas Instruments TMP401 temperature sensor driver");
|
|
MODULE_LICENSE("GPL");
|