14453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* 24453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * jc42.c - driver for Jedec JC42.4 compliant temperature sensors 34453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * 44453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * Copyright (c) 2010 Ericsson AB. 54453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * 64453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * Derived from lm77.c by Andras BALI <drewie@freemail.hu>. 74453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * 84453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * JC42.4 compliant temperature sensors are typically used on memory modules. 94453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * 104453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * This program is free software; you can redistribute it and/or modify 114453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * it under the terms of the GNU General Public License as published by 124453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * the Free Software Foundation; either version 2 of the License, or 134453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * (at your option) any later version. 144453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * 154453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * This program is distributed in the hope that it will be useful, 164453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * but WITHOUT ANY WARRANTY; without even the implied warranty of 174453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 184453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * GNU General Public License for more details. 194453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * 204453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * You should have received a copy of the GNU General Public License 214453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * along with this program; if not, write to the Free Software 224453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 234453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck */ 244453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 254453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/module.h> 264453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/init.h> 274453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/slab.h> 284453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/jiffies.h> 294453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/i2c.h> 304453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/hwmon.h> 314453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/hwmon-sysfs.h> 324453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/err.h> 334453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#include <linux/mutex.h> 344453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 354453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Addresses to scan */ 364453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic const unsigned short normal_i2c[] = { 374453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, I2C_CLIENT_END }; 384453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 394453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* JC42 registers. All registers are 16 bit. */ 404453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_CAP 0x00 414453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_CONFIG 0x01 424453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_TEMP_UPPER 0x02 434453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_TEMP_LOWER 0x03 444453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_TEMP_CRITICAL 0x04 454453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_TEMP 0x05 464453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_MANID 0x06 474453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_REG_DEVICEID 0x07 484453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 494453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Status bits in temperature register */ 504453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_ALARM_CRIT_BIT 15 514453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_ALARM_MAX_BIT 14 524453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_ALARM_MIN_BIT 13 534453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 544453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Configuration register defines */ 554453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_CFG_CRIT_ONLY (1 << 2) 562c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch#define JC42_CFG_TCRIT_LOCK (1 << 6) 572c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch#define JC42_CFG_EVENT_LOCK (1 << 7) 584453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_CFG_SHUTDOWN (1 << 8) 594453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_CFG_HYST_SHIFT 9 604453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_CFG_HYST_MASK 0x03 614453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 624453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Capabilities */ 634453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_CAP_RANGE (1 << 2) 644453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 654453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Manufacturer IDs */ 664453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define ADT_MANID 0x11d4 /* Analog Devices */ 671bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define ATMEL_MANID 0x001f /* Atmel */ 684453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MAX_MANID 0x004d /* Maxim */ 694453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define IDT_MANID 0x00b3 /* IDT */ 704453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP_MANID 0x0054 /* Microchip */ 714453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define NXP_MANID 0x1131 /* NXP Semiconductors */ 724453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define ONS_MANID 0x1b09 /* ON Semiconductor */ 734453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define STM_MANID 0x104a /* ST Microelectronics */ 744453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 754453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Supported chips */ 764453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 774453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Analog Devices */ 784453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define ADT7408_DEVID 0x0801 794453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define ADT7408_DEVID_MASK 0xffff 804453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 811bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck/* Atmel */ 821bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define AT30TS00_DEVID 0x8201 831bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define AT30TS00_DEVID_MASK 0xffff 841bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck 854453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* IDT */ 864453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define TS3000B3_DEVID 0x2903 /* Also matches TSE2002B3 */ 874453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define TS3000B3_DEVID_MASK 0xffff 884453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 891bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define TS3000GB2_DEVID 0x2912 /* Also matches TSE2002GB2 */ 901bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define TS3000GB2_DEVID_MASK 0xffff 911bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck 924453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Maxim */ 934453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MAX6604_DEVID 0x3e00 944453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MAX6604_DEVID_MASK 0xffff 954453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 964453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Microchip */ 971bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define MCP9804_DEVID 0x0200 981bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck#define MCP9804_DEVID_MASK 0xfffc 991bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck 1004453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP98242_DEVID 0x2000 1014453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP98242_DEVID_MASK 0xfffc 1024453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1034453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP98243_DEVID 0x2100 1044453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP98243_DEVID_MASK 0xfffc 1054453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1064453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP9843_DEVID 0x0000 /* Also matches mcp9805 */ 1074453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define MCP9843_DEVID_MASK 0xfffe 1084453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1094453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* NXP */ 1104453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define SE97_DEVID 0xa200 1114453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define SE97_DEVID_MASK 0xfffc 1124453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1134453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define SE98_DEVID 0xa100 1144453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define SE98_DEVID_MASK 0xfffc 1154453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1164453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* ON Semiconductor */ 1174453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define CAT6095_DEVID 0x0800 /* Also matches CAT34TS02 */ 1184453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define CAT6095_DEVID_MASK 0xffe0 1194453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1204453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* ST Microelectronics */ 1214453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define STTS424_DEVID 0x0101 1224453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define STTS424_DEVID_MASK 0xffff 1234453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1244453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define STTS424E_DEVID 0x0000 1254453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define STTS424E_DEVID_MASK 0xfffe 1264453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1274de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare#define STTS2002_DEVID 0x0300 1284de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare#define STTS2002_DEVID_MASK 0xffff 1294de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare 1304de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare#define STTS3000_DEVID 0x0200 1314de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare#define STTS3000_DEVID_MASK 0xffff 1324de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare 1334453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic u16 jc42_hysteresis[] = { 0, 1500, 3000, 6000 }; 1344453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1354453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstruct jc42_chips { 1364453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 manid; 1374453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 devid; 1384453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 devid_mask; 1394453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 1404453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1414453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic struct jc42_chips jc42_chips[] = { 1424453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { ADT_MANID, ADT7408_DEVID, ADT7408_DEVID_MASK }, 1431bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck { ATMEL_MANID, AT30TS00_DEVID, AT30TS00_DEVID_MASK }, 1444453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { IDT_MANID, TS3000B3_DEVID, TS3000B3_DEVID_MASK }, 1451bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck { IDT_MANID, TS3000GB2_DEVID, TS3000GB2_DEVID_MASK }, 1464453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { MAX_MANID, MAX6604_DEVID, MAX6604_DEVID_MASK }, 1471bd612a25855f4cc9345052b53d7da697dba6358Guenter Roeck { MCP_MANID, MCP9804_DEVID, MCP9804_DEVID_MASK }, 1484453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { MCP_MANID, MCP98242_DEVID, MCP98242_DEVID_MASK }, 1494453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { MCP_MANID, MCP98243_DEVID, MCP98243_DEVID_MASK }, 1504453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { MCP_MANID, MCP9843_DEVID, MCP9843_DEVID_MASK }, 1514453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { NXP_MANID, SE97_DEVID, SE97_DEVID_MASK }, 1524453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { ONS_MANID, CAT6095_DEVID, CAT6095_DEVID_MASK }, 1534453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { NXP_MANID, SE98_DEVID, SE98_DEVID_MASK }, 1544453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { STM_MANID, STTS424_DEVID, STTS424_DEVID_MASK }, 1554453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { STM_MANID, STTS424E_DEVID, STTS424E_DEVID_MASK }, 1564de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare { STM_MANID, STTS2002_DEVID, STTS2002_DEVID_MASK }, 1574de86126a712ba83fa038d277c8282f7ed466a4bJean Delvare { STM_MANID, STTS3000_DEVID, STTS3000_DEVID_MASK }, 1584453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 1594453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1604453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Each client has this additional data */ 1614453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstruct jc42_data { 1624453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device *hwmon_dev; 1634453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct mutex update_lock; /* protect register access */ 1644453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck bool extended; /* true if extended range supported */ 1654453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck bool valid; 1664453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck unsigned long last_updated; /* In jiffies */ 1674453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 orig_config; /* original configuration */ 1684453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 config; /* current configuration */ 1694453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 temp_input; /* Temperatures */ 1704453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 temp_crit; 1714453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 temp_min; 1724453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 temp_max; 1734453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 1744453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1754453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_probe(struct i2c_client *client, 1764453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck const struct i2c_device_id *id); 1774453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_detect(struct i2c_client *client, struct i2c_board_info *info); 1784453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_remove(struct i2c_client *client); 1794453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1804453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic struct jc42_data *jc42_update_device(struct device *dev); 1814453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1824453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic const struct i2c_device_id jc42_id[] = { 1834453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { "jc42", 0 }, 1844453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck { } 1854453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 1864453d7364d3b1f92475f104d4625abee36a7733dGuenter RoeckMODULE_DEVICE_TABLE(i2c, jc42_id); 1874453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1884453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#ifdef CONFIG_PM 1894453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1904453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_suspend(struct device *dev) 1914453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 1924453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct i2c_client *client = to_i2c_client(dev); 1934453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = i2c_get_clientdata(client); 1944453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 1954453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->config |= JC42_CFG_SHUTDOWN; 19690f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config); 1974453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return 0; 1984453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 1994453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2004453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_resume(struct device *dev) 2014453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 2024453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct i2c_client *client = to_i2c_client(dev); 2034453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = i2c_get_clientdata(client); 2044453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2054453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->config &= ~JC42_CFG_SHUTDOWN; 20690f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, data->config); 2074453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return 0; 2084453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 2094453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2104453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic const struct dev_pm_ops jc42_dev_pm_ops = { 2114453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .suspend = jc42_suspend, 2124453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .resume = jc42_resume, 2134453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 2144453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2154453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_DEV_PM_OPS (&jc42_dev_pm_ops) 2164453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#else 2174453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_DEV_PM_OPS NULL 2184453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#endif /* CONFIG_PM */ 2194453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2204453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* This is the driver that will be inserted */ 2214453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic struct i2c_driver jc42_driver = { 222774466add7c810fd7e4c8bcf41995b6799608880Jean Delvare .class = I2C_CLASS_SPD, 2234453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .driver = { 2244453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .name = "jc42", 2254453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .pm = JC42_DEV_PM_OPS, 2264453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck }, 2274453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .probe = jc42_probe, 2284453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .remove = jc42_remove, 2294453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .id_table = jc42_id, 2304453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .detect = jc42_detect, 2314453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .address_list = normal_i2c, 2324453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 2334453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2344453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_TEMP_MIN_EXTENDED (-40000) 2354453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_TEMP_MIN 0 2364453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define JC42_TEMP_MAX 125000 2374453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2384453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic u16 jc42_temp_to_reg(int temp, bool extended) 2394453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 2404453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int ntemp = SENSORS_LIMIT(temp, 2414453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck extended ? JC42_TEMP_MIN_EXTENDED : 2424453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck JC42_TEMP_MIN, JC42_TEMP_MAX); 2434453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2444453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck /* convert from 0.001 to 0.0625 resolution */ 2454453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return (ntemp * 2 / 125) & 0x1fff; 2464453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 2474453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2484453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_temp_from_reg(s16 reg) 2494453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 2504453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck reg &= 0x1fff; 2514453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2524453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck /* sign extend register */ 2534453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (reg & 0x1000) 2544453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck reg |= 0xf000; 2554453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2564453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck /* convert from 0.0625 to 0.001 resolution */ 2574453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return reg * 125 / 2; 2584453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 2594453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2604453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* sysfs stuff */ 2614453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2624453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* read routines for temperature limits */ 2634453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define show(value) \ 2644453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic ssize_t show_##value(struct device *dev, \ 2654453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device_attribute *attr, \ 2664453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck char *buf) \ 2674453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ \ 2684453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = jc42_update_device(dev); \ 2694453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (IS_ERR(data)) \ 2704453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return PTR_ERR(data); \ 2714453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return sprintf(buf, "%d\n", jc42_temp_from_reg(data->value)); \ 2724453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 2734453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2744453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckshow(temp_input); 2754453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckshow(temp_crit); 2764453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckshow(temp_min); 2774453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckshow(temp_max); 2784453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2794453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* read routines for hysteresis values */ 2804453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic ssize_t show_temp_crit_hyst(struct device *dev, 2814453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device_attribute *attr, char *buf) 2824453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 2834453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = jc42_update_device(dev); 2844453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int temp, hyst; 2854453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2864453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (IS_ERR(data)) 2874453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return PTR_ERR(data); 2884453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2894453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck temp = jc42_temp_from_reg(data->temp_crit); 2904453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) 2914453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck & JC42_CFG_HYST_MASK]; 2924453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return sprintf(buf, "%d\n", temp - hyst); 2934453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 2944453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 2954453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic ssize_t show_temp_max_hyst(struct device *dev, 2964453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device_attribute *attr, char *buf) 2974453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 2984453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = jc42_update_device(dev); 2994453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int temp, hyst; 3004453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3014453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (IS_ERR(data)) 3024453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return PTR_ERR(data); 3034453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3044453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck temp = jc42_temp_from_reg(data->temp_max); 3054453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hyst = jc42_hysteresis[(data->config >> JC42_CFG_HYST_SHIFT) 3064453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck & JC42_CFG_HYST_MASK]; 3074453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return sprintf(buf, "%d\n", temp - hyst); 3084453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 3094453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3104453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* write routines */ 3114453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck#define set(value, reg) \ 3124453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic ssize_t set_##value(struct device *dev, \ 3134453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device_attribute *attr, \ 3144453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck const char *buf, size_t count) \ 3154453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ \ 3164453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct i2c_client *client = to_i2c_client(dev); \ 3174453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = i2c_get_clientdata(client); \ 3184453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int err, ret = count; \ 3194453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck long val; \ 320179c4fdb565dd2157e5dfe89318b74868e3b523dFrans Meulenbroeks if (kstrtol(buf, 10, &val) < 0) \ 3214453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return -EINVAL; \ 3224453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_lock(&data->update_lock); \ 3234453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->value = jc42_temp_to_reg(val, data->extended); \ 32490f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare err = i2c_smbus_write_word_swapped(client, reg, data->value); \ 3254453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (err < 0) \ 3264453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck ret = err; \ 3274453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_unlock(&data->update_lock); \ 3284453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return ret; \ 3294453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 3304453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3314453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckset(temp_min, JC42_REG_TEMP_LOWER); 3324453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckset(temp_max, JC42_REG_TEMP_UPPER); 3334453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckset(temp_crit, JC42_REG_TEMP_CRITICAL); 3344453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3355d577dba0443634f11fec0547b6cbca5ac0b0e57Guenter Roeck/* 3365d577dba0443634f11fec0547b6cbca5ac0b0e57Guenter Roeck * JC42.4 compliant chips only support four hysteresis values. 3375d577dba0443634f11fec0547b6cbca5ac0b0e57Guenter Roeck * Pick best choice and go from there. 3385d577dba0443634f11fec0547b6cbca5ac0b0e57Guenter Roeck */ 3394453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic ssize_t set_temp_crit_hyst(struct device *dev, 3404453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device_attribute *attr, 3414453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck const char *buf, size_t count) 3424453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 3434453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct i2c_client *client = to_i2c_client(dev); 3444453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = i2c_get_clientdata(client); 345e866729605a43a739fc56023a8530b07a93d3458Clemens Ladisch unsigned long val; 3464453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int diff, hyst; 3474453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int err; 3484453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int ret = count; 3494453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 350179c4fdb565dd2157e5dfe89318b74868e3b523dFrans Meulenbroeks if (kstrtoul(buf, 10, &val) < 0) 3514453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return -EINVAL; 3524453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3534453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck diff = jc42_temp_from_reg(data->temp_crit) - val; 3544453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hyst = 0; 3554453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (diff > 0) { 3564453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (diff < 2250) 3574453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hyst = 1; /* 1.5 degrees C */ 3584453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck else if (diff < 4500) 3594453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hyst = 2; /* 3.0 degrees C */ 3604453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck else 3614453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hyst = 3; /* 6.0 degrees C */ 3624453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 3634453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3644453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_lock(&data->update_lock); 3654453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->config = (data->config 3664453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck & ~(JC42_CFG_HYST_MASK << JC42_CFG_HYST_SHIFT)) 3674453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck | (hyst << JC42_CFG_HYST_SHIFT); 36890f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare err = i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, 36990f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare data->config); 3704453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (err < 0) 3714453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck ret = err; 3724453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_unlock(&data->update_lock); 3734453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return ret; 3744453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 3754453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3764453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic ssize_t show_alarm(struct device *dev, 3774453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct device_attribute *attr, char *buf) 3784453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 3794453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 bit = to_sensor_dev_attr(attr)->index; 3804453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = jc42_update_device(dev); 3814453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck u16 val; 3824453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3834453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (IS_ERR(data)) 3844453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return PTR_ERR(data); 3854453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3864453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck val = data->temp_input; 3874453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (bit != JC42_ALARM_CRIT_BIT && (data->config & JC42_CFG_CRIT_ONLY)) 3884453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck val = 0; 3894453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return sprintf(buf, "%u\n", (val >> bit) & 1); 3904453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 3914453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 3924453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic DEVICE_ATTR(temp1_input, S_IRUGO, 3934453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck show_temp_input, NULL); 3942c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladischstatic DEVICE_ATTR(temp1_crit, S_IRUGO, 3954453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck show_temp_crit, set_temp_crit); 3962c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladischstatic DEVICE_ATTR(temp1_min, S_IRUGO, 3974453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck show_temp_min, set_temp_min); 3982c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladischstatic DEVICE_ATTR(temp1_max, S_IRUGO, 3994453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck show_temp_max, set_temp_max); 4004453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4012c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladischstatic DEVICE_ATTR(temp1_crit_hyst, S_IRUGO, 4024453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck show_temp_crit_hyst, set_temp_crit_hyst); 4034453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic DEVICE_ATTR(temp1_max_hyst, S_IRUGO, 4044453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck show_temp_max_hyst, NULL); 4054453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4064453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO, show_alarm, NULL, 4074453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck JC42_ALARM_CRIT_BIT); 4084453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO, show_alarm, NULL, 4094453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck JC42_ALARM_MIN_BIT); 4104453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO, show_alarm, NULL, 4114453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck JC42_ALARM_MAX_BIT); 4124453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4134453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic struct attribute *jc42_attributes[] = { 4144453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &dev_attr_temp1_input.attr, 4154453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &dev_attr_temp1_crit.attr, 4164453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &dev_attr_temp1_min.attr, 4174453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &dev_attr_temp1_max.attr, 4184453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &dev_attr_temp1_crit_hyst.attr, 4194453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &dev_attr_temp1_max_hyst.attr, 4204453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &sensor_dev_attr_temp1_crit_alarm.dev_attr.attr, 4214453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &sensor_dev_attr_temp1_min_alarm.dev_attr.attr, 4224453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck &sensor_dev_attr_temp1_max_alarm.dev_attr.attr, 4234453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck NULL 4244453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 4254453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 426587a1f1659e8b330b8738ef4901832a2b63f0bedAl Virostatic umode_t jc42_attribute_mode(struct kobject *kobj, 4272c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch struct attribute *attr, int index) 4282c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch{ 4292c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch struct device *dev = container_of(kobj, struct device, kobj); 4302c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch struct i2c_client *client = to_i2c_client(dev); 4312c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch struct jc42_data *data = i2c_get_clientdata(client); 4322c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch unsigned int config = data->config; 4332c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch bool readonly; 4342c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch 4352c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch if (attr == &dev_attr_temp1_crit.attr) 4362c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch readonly = config & JC42_CFG_TCRIT_LOCK; 4372c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch else if (attr == &dev_attr_temp1_min.attr || 4382c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch attr == &dev_attr_temp1_max.attr) 4392c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch readonly = config & JC42_CFG_EVENT_LOCK; 4402c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch else if (attr == &dev_attr_temp1_crit_hyst.attr) 4412c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch readonly = config & (JC42_CFG_EVENT_LOCK | JC42_CFG_TCRIT_LOCK); 4422c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch else 4432c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch readonly = true; 4442c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch 4452c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch return S_IRUGO | (readonly ? 0 : S_IWUSR); 4462c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch} 4472c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch 4484453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic const struct attribute_group jc42_group = { 4494453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck .attrs = jc42_attributes, 4502c6315da6a1657a49e03970a4084dc3d1958ad70Clemens Ladisch .is_visible = jc42_attribute_mode, 4514453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck}; 4524453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4534453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck/* Return 0 if detection is successful, -ENODEV otherwise */ 454f15df57ded710bd018794a264b900975ce3599a0Guenter Roeckstatic int jc42_detect(struct i2c_client *client, struct i2c_board_info *info) 4554453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 456f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck struct i2c_adapter *adapter = client->adapter; 4574453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int i, config, cap, manid, devid; 4584453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4594453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA | 4604453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck I2C_FUNC_SMBUS_WORD_DATA)) 4614453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return -ENODEV; 4624453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 463f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP); 464f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG); 465f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck manid = i2c_smbus_read_word_swapped(client, JC42_REG_MANID); 466f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck devid = i2c_smbus_read_word_swapped(client, JC42_REG_DEVICEID); 4674453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4684453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (cap < 0 || config < 0 || manid < 0 || devid < 0) 4694453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return -ENODEV; 4704453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4714453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if ((cap & 0xff00) || (config & 0xf800)) 4724453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return -ENODEV; 4734453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 4744453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck for (i = 0; i < ARRAY_SIZE(jc42_chips); i++) { 4754453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_chips *chip = &jc42_chips[i]; 4764453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (manid == chip->manid && 4774453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck (devid & chip->devid_mask) == chip->devid) { 4784453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck strlcpy(info->type, "jc42", I2C_NAME_SIZE); 4794453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return 0; 4804453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 4814453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 4824453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return -ENODEV; 4834453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 4844453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 485f15df57ded710bd018794a264b900975ce3599a0Guenter Roeckstatic int jc42_probe(struct i2c_client *client, const struct i2c_device_id *id) 4864453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 4874453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data; 4884453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int config, cap, err; 489f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck struct device *dev = &client->dev; 4904453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 491f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck data = devm_kzalloc(dev, sizeof(struct jc42_data), GFP_KERNEL); 492f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck if (!data) 493f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck return -ENOMEM; 4944453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 495f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck i2c_set_clientdata(client, data); 4964453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_init(&data->update_lock); 4974453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 498f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck cap = i2c_smbus_read_word_swapped(client, JC42_REG_CAP); 499f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck if (cap < 0) 500f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck return cap; 501f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck 5024453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->extended = !!(cap & JC42_CAP_RANGE); 5034453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 504f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck config = i2c_smbus_read_word_swapped(client, JC42_REG_CONFIG); 505f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck if (config < 0) 506f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck return config; 507f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck 5084453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->orig_config = config; 5094453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (config & JC42_CFG_SHUTDOWN) { 5104453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck config &= ~JC42_CFG_SHUTDOWN; 511f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, config); 5124453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5134453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->config = config; 5144453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5154453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck /* Register sysfs hooks */ 516f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck err = sysfs_create_group(&dev->kobj, &jc42_group); 5174453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (err) 518f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck return err; 5194453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 520f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck data->hwmon_dev = hwmon_device_register(dev); 5214453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (IS_ERR(data->hwmon_dev)) { 5224453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck err = PTR_ERR(data->hwmon_dev); 5234453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck goto exit_remove; 5244453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5254453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5264453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return 0; 5274453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5284453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckexit_remove: 529f15df57ded710bd018794a264b900975ce3599a0Guenter Roeck sysfs_remove_group(&dev->kobj, &jc42_group); 5304453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return err; 5314453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 5324453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5334453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic int jc42_remove(struct i2c_client *client) 5344453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 5354453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = i2c_get_clientdata(client); 5364453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck hwmon_device_unregister(data->hwmon_dev); 5374453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck sysfs_remove_group(&client->dev.kobj, &jc42_group); 5384453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (data->config != data->orig_config) 53990f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare i2c_smbus_write_word_swapped(client, JC42_REG_CONFIG, 54090f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare data->orig_config); 5414453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return 0; 5424453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 5434453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5444453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckstatic struct jc42_data *jc42_update_device(struct device *dev) 5454453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck{ 5464453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct i2c_client *client = to_i2c_client(dev); 5474453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *data = i2c_get_clientdata(client); 5484453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck struct jc42_data *ret = data; 5494453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck int val; 5504453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5514453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_lock(&data->update_lock); 5524453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5534453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (time_after(jiffies, data->last_updated + HZ) || !data->valid) { 55490f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP); 5554453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (val < 0) { 5564453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck ret = ERR_PTR(val); 5574453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck goto abort; 5584453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5594453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->temp_input = val; 5604453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 56190f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare val = i2c_smbus_read_word_swapped(client, 56290f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare JC42_REG_TEMP_CRITICAL); 5634453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (val < 0) { 5644453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck ret = ERR_PTR(val); 5654453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck goto abort; 5664453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5674453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->temp_crit = val; 5684453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 56990f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_LOWER); 5704453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (val < 0) { 5714453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck ret = ERR_PTR(val); 5724453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck goto abort; 5734453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5744453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->temp_min = val; 5754453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 57690f4102ce59226954edbe960b2434d8b3da5f086Jean Delvare val = i2c_smbus_read_word_swapped(client, JC42_REG_TEMP_UPPER); 5774453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck if (val < 0) { 5784453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck ret = ERR_PTR(val); 5794453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck goto abort; 5804453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5814453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->temp_max = val; 5824453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5834453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->last_updated = jiffies; 5844453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck data->valid = true; 5854453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck } 5864453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeckabort: 5874453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck mutex_unlock(&data->update_lock); 5884453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck return ret; 5894453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck} 5904453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 591f0967eea80ec2a19a4fe1ad27e3ff1b22c79a3c7Axel Linmodule_i2c_driver(jc42_driver); 5924453d7364d3b1f92475f104d4625abee36a7733dGuenter Roeck 5934453d7364d3b1f92475f104d4625abee36a7733dGuenter RoeckMODULE_AUTHOR("Guenter Roeck <guenter.roeck@ericsson.com>"); 5944453d7364d3b1f92475f104d4625abee36a7733dGuenter RoeckMODULE_DESCRIPTION("JC42 driver"); 5954453d7364d3b1f92475f104d4625abee36a7733dGuenter RoeckMODULE_LICENSE("GPL"); 596