mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-05 17:26:40 +07:00
4538bfbf2d
Converts the unsigned temperature values from the i2c read
to be sign extended as defined in the datasheet so that
negative temperatures are properly read.
Fixes: 28e6274d8f
("hwmon: (amc6821) Avoid forward declaration")
Signed-off-by: Jared Bents <jared.bents@rockwellcollins.com>
Signed-off-by: Matt Weber <matthew.weber@rockwellcollins.com>
[groeck: Dropped unnecessary continuation line]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
1022 lines
27 KiB
C
1022 lines
27 KiB
C
/*
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* amc6821.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (C) 2009 T. Mertelj <tomaz.mertelj@guest.arnes.si>
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*
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* Based on max6650.c:
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* Copyright (C) 2007 Hans J. Koch <hjk@hansjkoch.de>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <linux/kernel.h> /* Needed for KERN_INFO */
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/jiffies.h>
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#include <linux/i2c.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#include <linux/err.h>
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#include <linux/mutex.h>
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/*
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* Addresses to scan.
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*/
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static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e,
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0x4c, 0x4d, 0x4e, I2C_CLIENT_END};
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/*
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* Insmod parameters
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*/
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static int pwminv; /*Inverted PWM output. */
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module_param(pwminv, int, S_IRUGO);
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static int init = 1; /*Power-on initialization.*/
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module_param(init, int, S_IRUGO);
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enum chips { amc6821 };
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#define AMC6821_REG_DEV_ID 0x3D
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#define AMC6821_REG_COMP_ID 0x3E
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#define AMC6821_REG_CONF1 0x00
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#define AMC6821_REG_CONF2 0x01
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#define AMC6821_REG_CONF3 0x3F
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#define AMC6821_REG_CONF4 0x04
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#define AMC6821_REG_STAT1 0x02
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#define AMC6821_REG_STAT2 0x03
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#define AMC6821_REG_TDATA_LOW 0x08
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#define AMC6821_REG_TDATA_HI 0x09
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#define AMC6821_REG_LTEMP_HI 0x0A
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#define AMC6821_REG_RTEMP_HI 0x0B
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#define AMC6821_REG_LTEMP_LIMIT_MIN 0x15
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#define AMC6821_REG_LTEMP_LIMIT_MAX 0x14
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#define AMC6821_REG_RTEMP_LIMIT_MIN 0x19
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#define AMC6821_REG_RTEMP_LIMIT_MAX 0x18
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#define AMC6821_REG_LTEMP_CRIT 0x1B
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#define AMC6821_REG_RTEMP_CRIT 0x1D
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#define AMC6821_REG_PSV_TEMP 0x1C
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#define AMC6821_REG_DCY 0x22
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#define AMC6821_REG_LTEMP_FAN_CTRL 0x24
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#define AMC6821_REG_RTEMP_FAN_CTRL 0x25
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#define AMC6821_REG_DCY_LOW_TEMP 0x21
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#define AMC6821_REG_TACH_LLIMITL 0x10
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#define AMC6821_REG_TACH_LLIMITH 0x11
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#define AMC6821_REG_TACH_HLIMITL 0x12
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#define AMC6821_REG_TACH_HLIMITH 0x13
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#define AMC6821_CONF1_START 0x01
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#define AMC6821_CONF1_FAN_INT_EN 0x02
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#define AMC6821_CONF1_FANIE 0x04
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#define AMC6821_CONF1_PWMINV 0x08
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#define AMC6821_CONF1_FAN_FAULT_EN 0x10
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#define AMC6821_CONF1_FDRC0 0x20
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#define AMC6821_CONF1_FDRC1 0x40
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#define AMC6821_CONF1_THERMOVIE 0x80
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#define AMC6821_CONF2_PWM_EN 0x01
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#define AMC6821_CONF2_TACH_MODE 0x02
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#define AMC6821_CONF2_TACH_EN 0x04
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#define AMC6821_CONF2_RTFIE 0x08
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#define AMC6821_CONF2_LTOIE 0x10
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#define AMC6821_CONF2_RTOIE 0x20
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#define AMC6821_CONF2_PSVIE 0x40
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#define AMC6821_CONF2_RST 0x80
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#define AMC6821_CONF3_THERM_FAN_EN 0x80
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#define AMC6821_CONF3_REV_MASK 0x0F
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#define AMC6821_CONF4_OVREN 0x10
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#define AMC6821_CONF4_TACH_FAST 0x20
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#define AMC6821_CONF4_PSPR 0x40
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#define AMC6821_CONF4_MODE 0x80
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#define AMC6821_STAT1_RPM_ALARM 0x01
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#define AMC6821_STAT1_FANS 0x02
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#define AMC6821_STAT1_RTH 0x04
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#define AMC6821_STAT1_RTL 0x08
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#define AMC6821_STAT1_R_THERM 0x10
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#define AMC6821_STAT1_RTF 0x20
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#define AMC6821_STAT1_LTH 0x40
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#define AMC6821_STAT1_LTL 0x80
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#define AMC6821_STAT2_RTC 0x08
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#define AMC6821_STAT2_LTC 0x10
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#define AMC6821_STAT2_LPSV 0x20
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#define AMC6821_STAT2_L_THERM 0x40
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#define AMC6821_STAT2_THERM_IN 0x80
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enum {IDX_TEMP1_INPUT = 0, IDX_TEMP1_MIN, IDX_TEMP1_MAX,
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IDX_TEMP1_CRIT, IDX_TEMP2_INPUT, IDX_TEMP2_MIN,
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IDX_TEMP2_MAX, IDX_TEMP2_CRIT,
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TEMP_IDX_LEN, };
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static const u8 temp_reg[] = {AMC6821_REG_LTEMP_HI,
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AMC6821_REG_LTEMP_LIMIT_MIN,
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AMC6821_REG_LTEMP_LIMIT_MAX,
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AMC6821_REG_LTEMP_CRIT,
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AMC6821_REG_RTEMP_HI,
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AMC6821_REG_RTEMP_LIMIT_MIN,
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AMC6821_REG_RTEMP_LIMIT_MAX,
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AMC6821_REG_RTEMP_CRIT, };
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enum {IDX_FAN1_INPUT = 0, IDX_FAN1_MIN, IDX_FAN1_MAX,
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FAN1_IDX_LEN, };
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static const u8 fan_reg_low[] = {AMC6821_REG_TDATA_LOW,
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AMC6821_REG_TACH_LLIMITL,
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AMC6821_REG_TACH_HLIMITL, };
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static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI,
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AMC6821_REG_TACH_LLIMITH,
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AMC6821_REG_TACH_HLIMITH, };
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/*
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* Client data (each client gets its own)
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*/
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struct amc6821_data {
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struct i2c_client *client;
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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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/* register values */
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int temp[TEMP_IDX_LEN];
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u16 fan[FAN1_IDX_LEN];
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u8 fan1_div;
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u8 pwm1;
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u8 temp1_auto_point_temp[3];
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u8 temp2_auto_point_temp[3];
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u8 pwm1_auto_point_pwm[3];
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u8 pwm1_enable;
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u8 pwm1_auto_channels_temp;
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u8 stat1;
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u8 stat2;
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};
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static struct amc6821_data *amc6821_update_device(struct device *dev)
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{
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struct amc6821_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int timeout = HZ;
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u8 reg;
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int i;
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + timeout) ||
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!data->valid) {
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for (i = 0; i < TEMP_IDX_LEN; i++)
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data->temp[i] = (int8_t)i2c_smbus_read_byte_data(
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client, temp_reg[i]);
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data->stat1 = i2c_smbus_read_byte_data(client,
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AMC6821_REG_STAT1);
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data->stat2 = i2c_smbus_read_byte_data(client,
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AMC6821_REG_STAT2);
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data->pwm1 = i2c_smbus_read_byte_data(client,
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AMC6821_REG_DCY);
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for (i = 0; i < FAN1_IDX_LEN; i++) {
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data->fan[i] = i2c_smbus_read_byte_data(
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client,
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fan_reg_low[i]);
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data->fan[i] += i2c_smbus_read_byte_data(
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client,
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fan_reg_hi[i]) << 8;
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}
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data->fan1_div = i2c_smbus_read_byte_data(client,
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AMC6821_REG_CONF4);
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data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2;
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data->pwm1_auto_point_pwm[0] = 0;
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data->pwm1_auto_point_pwm[2] = 255;
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data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client,
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AMC6821_REG_DCY_LOW_TEMP);
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data->temp1_auto_point_temp[0] =
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i2c_smbus_read_byte_data(client,
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AMC6821_REG_PSV_TEMP);
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data->temp2_auto_point_temp[0] =
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data->temp1_auto_point_temp[0];
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reg = i2c_smbus_read_byte_data(client,
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AMC6821_REG_LTEMP_FAN_CTRL);
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data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1;
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reg &= 0x07;
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reg = 0x20 >> reg;
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if (reg > 0)
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data->temp1_auto_point_temp[2] =
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data->temp1_auto_point_temp[1] +
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(data->pwm1_auto_point_pwm[2] -
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data->pwm1_auto_point_pwm[1]) / reg;
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else
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data->temp1_auto_point_temp[2] = 255;
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reg = i2c_smbus_read_byte_data(client,
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AMC6821_REG_RTEMP_FAN_CTRL);
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data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1;
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reg &= 0x07;
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reg = 0x20 >> reg;
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if (reg > 0)
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data->temp2_auto_point_temp[2] =
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data->temp2_auto_point_temp[1] +
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(data->pwm1_auto_point_pwm[2] -
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data->pwm1_auto_point_pwm[1]) / reg;
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else
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data->temp2_auto_point_temp[2] = 255;
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reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
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reg = (reg >> 5) & 0x3;
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switch (reg) {
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case 0: /*open loop: software sets pwm1*/
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data->pwm1_auto_channels_temp = 0;
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data->pwm1_enable = 1;
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break;
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case 2: /*closed loop: remote T (temp2)*/
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data->pwm1_auto_channels_temp = 2;
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data->pwm1_enable = 2;
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break;
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case 3: /*closed loop: local and remote T (temp2)*/
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data->pwm1_auto_channels_temp = 3;
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data->pwm1_enable = 3;
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break;
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case 1: /*
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* semi-open loop: software sets rpm, chip controls
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* pwm1, currently not implemented
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*/
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data->pwm1_auto_channels_temp = 0;
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data->pwm1_enable = 0;
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break;
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}
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data->last_updated = jiffies;
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data->valid = 1;
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}
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mutex_unlock(&data->update_lock);
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return data;
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}
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static ssize_t get_temp(
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struct device *dev,
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struct device_attribute *devattr,
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char *buf)
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{
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struct amc6821_data *data = amc6821_update_device(dev);
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int ix = to_sensor_dev_attr(devattr)->index;
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return sprintf(buf, "%d\n", data->temp[ix] * 1000);
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}
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static ssize_t set_temp(
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struct device *dev,
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struct device_attribute *attr,
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const char *buf,
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size_t count)
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{
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struct amc6821_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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int ix = to_sensor_dev_attr(attr)->index;
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long val;
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int ret = kstrtol(buf, 10, &val);
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if (ret)
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return ret;
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val = clamp_val(val / 1000, -128, 127);
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mutex_lock(&data->update_lock);
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data->temp[ix] = val;
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if (i2c_smbus_write_byte_data(client, temp_reg[ix], data->temp[ix])) {
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dev_err(&client->dev, "Register write error, aborting.\n");
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count = -EIO;
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}
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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 get_temp_alarm(
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struct device *dev,
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struct device_attribute *devattr,
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char *buf)
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{
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struct amc6821_data *data = amc6821_update_device(dev);
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int ix = to_sensor_dev_attr(devattr)->index;
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u8 flag;
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switch (ix) {
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case IDX_TEMP1_MIN:
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flag = data->stat1 & AMC6821_STAT1_LTL;
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break;
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case IDX_TEMP1_MAX:
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flag = data->stat1 & AMC6821_STAT1_LTH;
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break;
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case IDX_TEMP1_CRIT:
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flag = data->stat2 & AMC6821_STAT2_LTC;
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break;
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case IDX_TEMP2_MIN:
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flag = data->stat1 & AMC6821_STAT1_RTL;
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break;
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case IDX_TEMP2_MAX:
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flag = data->stat1 & AMC6821_STAT1_RTH;
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break;
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case IDX_TEMP2_CRIT:
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flag = data->stat2 & AMC6821_STAT2_RTC;
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break;
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default:
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dev_dbg(dev, "Unknown attr->index (%d).\n", ix);
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return -EINVAL;
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}
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if (flag)
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return sprintf(buf, "1");
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else
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return sprintf(buf, "0");
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}
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|
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static ssize_t get_temp2_fault(
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struct device *dev,
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struct device_attribute *devattr,
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char *buf)
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{
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struct amc6821_data *data = amc6821_update_device(dev);
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if (data->stat1 & AMC6821_STAT1_RTF)
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return sprintf(buf, "1");
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else
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return sprintf(buf, "0");
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}
|
|
|
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static ssize_t get_pwm1(
|
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struct device *dev,
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struct device_attribute *devattr,
|
|
char *buf)
|
|
{
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struct amc6821_data *data = amc6821_update_device(dev);
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return sprintf(buf, "%d\n", data->pwm1);
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}
|
|
|
|
static ssize_t set_pwm1(
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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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struct amc6821_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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int ret = kstrtol(buf, 10, &val);
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if (ret)
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return ret;
|
|
|
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mutex_lock(&data->update_lock);
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data->pwm1 = clamp_val(val , 0, 255);
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i2c_smbus_write_byte_data(client, AMC6821_REG_DCY, data->pwm1);
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mutex_unlock(&data->update_lock);
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return count;
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}
|
|
|
|
static ssize_t get_pwm1_enable(
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|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
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{
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struct amc6821_data *data = amc6821_update_device(dev);
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return sprintf(buf, "%d\n", data->pwm1_enable);
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}
|
|
|
|
static ssize_t set_pwm1_enable(
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|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
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struct amc6821_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
long val;
|
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int config = kstrtol(buf, 10, &val);
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if (config)
|
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return config;
|
|
|
|
mutex_lock(&data->update_lock);
|
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config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
|
|
if (config < 0) {
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dev_err(&client->dev,
|
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"Error reading configuration register, aborting.\n");
|
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count = config;
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goto unlock;
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}
|
|
|
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switch (val) {
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case 1:
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config &= ~AMC6821_CONF1_FDRC0;
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config &= ~AMC6821_CONF1_FDRC1;
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break;
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case 2:
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config &= ~AMC6821_CONF1_FDRC0;
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config |= AMC6821_CONF1_FDRC1;
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break;
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case 3:
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config |= AMC6821_CONF1_FDRC0;
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config |= AMC6821_CONF1_FDRC1;
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break;
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|
default:
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count = -EINVAL;
|
|
goto unlock;
|
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}
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) {
|
|
dev_err(&client->dev,
|
|
"Configuration register write error, aborting.\n");
|
|
count = -EIO;
|
|
}
|
|
unlock:
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t get_pwm1_auto_channels_temp(
|
|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp);
|
|
}
|
|
|
|
static ssize_t get_temp_auto_point_temp(
|
|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
int ix = to_sensor_dev_attr_2(devattr)->index;
|
|
int nr = to_sensor_dev_attr_2(devattr)->nr;
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
switch (nr) {
|
|
case 1:
|
|
return sprintf(buf, "%d\n",
|
|
data->temp1_auto_point_temp[ix] * 1000);
|
|
case 2:
|
|
return sprintf(buf, "%d\n",
|
|
data->temp2_auto_point_temp[ix] * 1000);
|
|
default:
|
|
dev_dbg(dev, "Unknown attr->nr (%d).\n", nr);
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
static ssize_t get_pwm1_auto_point_pwm(
|
|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
int ix = to_sensor_dev_attr(devattr)->index;
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]);
|
|
}
|
|
|
|
static inline ssize_t set_slope_register(struct i2c_client *client,
|
|
u8 reg,
|
|
u8 dpwm,
|
|
u8 *ptemp)
|
|
{
|
|
int dt;
|
|
u8 tmp;
|
|
|
|
dt = ptemp[2]-ptemp[1];
|
|
for (tmp = 4; tmp > 0; tmp--) {
|
|
if (dt * (0x20 >> tmp) >= dpwm)
|
|
break;
|
|
}
|
|
tmp |= (ptemp[1] & 0x7C) << 1;
|
|
if (i2c_smbus_write_byte_data(client,
|
|
reg, tmp)) {
|
|
dev_err(&client->dev, "Register write error, aborting.\n");
|
|
return -EIO;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t set_temp_auto_point_temp(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
struct i2c_client *client = data->client;
|
|
int ix = to_sensor_dev_attr_2(attr)->index;
|
|
int nr = to_sensor_dev_attr_2(attr)->nr;
|
|
u8 *ptemp;
|
|
u8 reg;
|
|
int dpwm;
|
|
long val;
|
|
int ret = kstrtol(buf, 10, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (nr) {
|
|
case 1:
|
|
ptemp = data->temp1_auto_point_temp;
|
|
reg = AMC6821_REG_LTEMP_FAN_CTRL;
|
|
break;
|
|
case 2:
|
|
ptemp = data->temp2_auto_point_temp;
|
|
reg = AMC6821_REG_RTEMP_FAN_CTRL;
|
|
break;
|
|
default:
|
|
dev_dbg(dev, "Unknown attr->nr (%d).\n", nr);
|
|
return -EINVAL;
|
|
}
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->valid = 0;
|
|
|
|
switch (ix) {
|
|
case 0:
|
|
ptemp[0] = clamp_val(val / 1000, 0,
|
|
data->temp1_auto_point_temp[1]);
|
|
ptemp[0] = clamp_val(ptemp[0], 0,
|
|
data->temp2_auto_point_temp[1]);
|
|
ptemp[0] = clamp_val(ptemp[0], 0, 63);
|
|
if (i2c_smbus_write_byte_data(
|
|
client,
|
|
AMC6821_REG_PSV_TEMP,
|
|
ptemp[0])) {
|
|
dev_err(&client->dev,
|
|
"Register write error, aborting.\n");
|
|
count = -EIO;
|
|
}
|
|
goto EXIT;
|
|
case 1:
|
|
ptemp[1] = clamp_val(val / 1000, (ptemp[0] & 0x7C) + 4, 124);
|
|
ptemp[1] &= 0x7C;
|
|
ptemp[2] = clamp_val(ptemp[2], ptemp[1] + 1, 255);
|
|
break;
|
|
case 2:
|
|
ptemp[2] = clamp_val(val / 1000, ptemp[1]+1, 255);
|
|
break;
|
|
default:
|
|
dev_dbg(dev, "Unknown attr->index (%d).\n", ix);
|
|
count = -EINVAL;
|
|
goto EXIT;
|
|
}
|
|
dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
|
|
if (set_slope_register(client, reg, dpwm, ptemp))
|
|
count = -EIO;
|
|
|
|
EXIT:
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t set_pwm1_auto_point_pwm(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf,
|
|
size_t count)
|
|
{
|
|
struct amc6821_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
int dpwm;
|
|
long val;
|
|
int ret = kstrtol(buf, 10, &val);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->pwm1_auto_point_pwm[1] = clamp_val(val, 0, 254);
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_DCY_LOW_TEMP,
|
|
data->pwm1_auto_point_pwm[1])) {
|
|
dev_err(&client->dev, "Register write error, aborting.\n");
|
|
count = -EIO;
|
|
goto EXIT;
|
|
}
|
|
dpwm = data->pwm1_auto_point_pwm[2] - data->pwm1_auto_point_pwm[1];
|
|
if (set_slope_register(client, AMC6821_REG_LTEMP_FAN_CTRL, dpwm,
|
|
data->temp1_auto_point_temp)) {
|
|
count = -EIO;
|
|
goto EXIT;
|
|
}
|
|
if (set_slope_register(client, AMC6821_REG_RTEMP_FAN_CTRL, dpwm,
|
|
data->temp2_auto_point_temp)) {
|
|
count = -EIO;
|
|
goto EXIT;
|
|
}
|
|
|
|
EXIT:
|
|
data->valid = 0;
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t get_fan(
|
|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
int ix = to_sensor_dev_attr(devattr)->index;
|
|
if (0 == data->fan[ix])
|
|
return sprintf(buf, "0");
|
|
return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix]));
|
|
}
|
|
|
|
static ssize_t get_fan1_fault(
|
|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
if (data->stat1 & AMC6821_STAT1_FANS)
|
|
return sprintf(buf, "1");
|
|
else
|
|
return sprintf(buf, "0");
|
|
}
|
|
|
|
static ssize_t set_fan(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct amc6821_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
long val;
|
|
int ix = to_sensor_dev_attr(attr)->index;
|
|
int ret = kstrtol(buf, 10, &val);
|
|
if (ret)
|
|
return ret;
|
|
val = 1 > val ? 0xFFFF : 6000000/val;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
data->fan[ix] = (u16) clamp_val(val, 1, 0xFFFF);
|
|
if (i2c_smbus_write_byte_data(client, fan_reg_low[ix],
|
|
data->fan[ix] & 0xFF)) {
|
|
dev_err(&client->dev, "Register write error, aborting.\n");
|
|
count = -EIO;
|
|
goto EXIT;
|
|
}
|
|
if (i2c_smbus_write_byte_data(client,
|
|
fan_reg_hi[ix], data->fan[ix] >> 8)) {
|
|
dev_err(&client->dev, "Register write error, aborting.\n");
|
|
count = -EIO;
|
|
}
|
|
EXIT:
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static ssize_t get_fan1_div(
|
|
struct device *dev,
|
|
struct device_attribute *devattr,
|
|
char *buf)
|
|
{
|
|
struct amc6821_data *data = amc6821_update_device(dev);
|
|
return sprintf(buf, "%d\n", data->fan1_div);
|
|
}
|
|
|
|
static ssize_t set_fan1_div(
|
|
struct device *dev,
|
|
struct device_attribute *attr,
|
|
const char *buf, size_t count)
|
|
{
|
|
struct amc6821_data *data = dev_get_drvdata(dev);
|
|
struct i2c_client *client = data->client;
|
|
long val;
|
|
int config = kstrtol(buf, 10, &val);
|
|
if (config)
|
|
return config;
|
|
|
|
mutex_lock(&data->update_lock);
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
|
|
if (config < 0) {
|
|
dev_err(&client->dev,
|
|
"Error reading configuration register, aborting.\n");
|
|
count = config;
|
|
goto EXIT;
|
|
}
|
|
switch (val) {
|
|
case 2:
|
|
config &= ~AMC6821_CONF4_PSPR;
|
|
data->fan1_div = 2;
|
|
break;
|
|
case 4:
|
|
config |= AMC6821_CONF4_PSPR;
|
|
data->fan1_div = 4;
|
|
break;
|
|
default:
|
|
count = -EINVAL;
|
|
goto EXIT;
|
|
}
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4, config)) {
|
|
dev_err(&client->dev,
|
|
"Configuration register write error, aborting.\n");
|
|
count = -EIO;
|
|
}
|
|
EXIT:
|
|
mutex_unlock(&data->update_lock);
|
|
return count;
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO,
|
|
get_temp, NULL, IDX_TEMP1_INPUT);
|
|
static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, get_temp,
|
|
set_temp, IDX_TEMP1_MIN);
|
|
static SENSOR_DEVICE_ATTR(temp1_max, S_IRUGO | S_IWUSR, get_temp,
|
|
set_temp, IDX_TEMP1_MAX);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit, S_IRUGO | S_IWUSR, get_temp,
|
|
set_temp, IDX_TEMP1_CRIT);
|
|
static SENSOR_DEVICE_ATTR(temp1_min_alarm, S_IRUGO,
|
|
get_temp_alarm, NULL, IDX_TEMP1_MIN);
|
|
static SENSOR_DEVICE_ATTR(temp1_max_alarm, S_IRUGO,
|
|
get_temp_alarm, NULL, IDX_TEMP1_MAX);
|
|
static SENSOR_DEVICE_ATTR(temp1_crit_alarm, S_IRUGO,
|
|
get_temp_alarm, NULL, IDX_TEMP1_CRIT);
|
|
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO,
|
|
get_temp, NULL, IDX_TEMP2_INPUT);
|
|
static SENSOR_DEVICE_ATTR(temp2_min, S_IRUGO | S_IWUSR, get_temp,
|
|
set_temp, IDX_TEMP2_MIN);
|
|
static SENSOR_DEVICE_ATTR(temp2_max, S_IRUGO | S_IWUSR, get_temp,
|
|
set_temp, IDX_TEMP2_MAX);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit, S_IRUGO | S_IWUSR, get_temp,
|
|
set_temp, IDX_TEMP2_CRIT);
|
|
static SENSOR_DEVICE_ATTR(temp2_fault, S_IRUGO,
|
|
get_temp2_fault, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(temp2_min_alarm, S_IRUGO,
|
|
get_temp_alarm, NULL, IDX_TEMP2_MIN);
|
|
static SENSOR_DEVICE_ATTR(temp2_max_alarm, S_IRUGO,
|
|
get_temp_alarm, NULL, IDX_TEMP2_MAX);
|
|
static SENSOR_DEVICE_ATTR(temp2_crit_alarm, S_IRUGO,
|
|
get_temp_alarm, NULL, IDX_TEMP2_CRIT);
|
|
static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, get_fan, NULL, IDX_FAN1_INPUT);
|
|
static SENSOR_DEVICE_ATTR(fan1_min, S_IRUGO | S_IWUSR,
|
|
get_fan, set_fan, IDX_FAN1_MIN);
|
|
static SENSOR_DEVICE_ATTR(fan1_max, S_IRUGO | S_IWUSR,
|
|
get_fan, set_fan, IDX_FAN1_MAX);
|
|
static SENSOR_DEVICE_ATTR(fan1_fault, S_IRUGO, get_fan1_fault, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(fan1_div, S_IRUGO | S_IWUSR,
|
|
get_fan1_div, set_fan1_div, 0);
|
|
|
|
static SENSOR_DEVICE_ATTR(pwm1, S_IWUSR | S_IRUGO, get_pwm1, set_pwm1, 0);
|
|
static SENSOR_DEVICE_ATTR(pwm1_enable, S_IWUSR | S_IRUGO,
|
|
get_pwm1_enable, set_pwm1_enable, 0);
|
|
static SENSOR_DEVICE_ATTR(pwm1_auto_point1_pwm, S_IRUGO,
|
|
get_pwm1_auto_point_pwm, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR(pwm1_auto_point2_pwm, S_IWUSR | S_IRUGO,
|
|
get_pwm1_auto_point_pwm, set_pwm1_auto_point_pwm, 1);
|
|
static SENSOR_DEVICE_ATTR(pwm1_auto_point3_pwm, S_IRUGO,
|
|
get_pwm1_auto_point_pwm, NULL, 2);
|
|
static SENSOR_DEVICE_ATTR(pwm1_auto_channels_temp, S_IRUGO,
|
|
get_pwm1_auto_channels_temp, NULL, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_auto_point1_temp, S_IRUGO,
|
|
get_temp_auto_point_temp, NULL, 1, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_auto_point2_temp, S_IWUSR | S_IRUGO,
|
|
get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp1_auto_point3_temp, S_IWUSR | S_IRUGO,
|
|
get_temp_auto_point_temp, set_temp_auto_point_temp, 1, 2);
|
|
|
|
static SENSOR_DEVICE_ATTR_2(temp2_auto_point1_temp, S_IWUSR | S_IRUGO,
|
|
get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 0);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IWUSR | S_IRUGO,
|
|
get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 1);
|
|
static SENSOR_DEVICE_ATTR_2(temp2_auto_point3_temp, S_IWUSR | S_IRUGO,
|
|
get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 2);
|
|
|
|
static struct attribute *amc6821_attrs[] = {
|
|
&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_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_max_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_min_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_max_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_crit_alarm.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_fault.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_input.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_min.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_max.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_fault.dev_attr.attr,
|
|
&sensor_dev_attr_fan1_div.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1_enable.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1_auto_channels_temp.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1_auto_point1_pwm.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1_auto_point2_pwm.dev_attr.attr,
|
|
&sensor_dev_attr_pwm1_auto_point3_pwm.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_auto_point1_temp.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr,
|
|
&sensor_dev_attr_temp1_auto_point3_temp.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_auto_point1_temp.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr,
|
|
&sensor_dev_attr_temp2_auto_point3_temp.dev_attr.attr,
|
|
NULL
|
|
};
|
|
|
|
ATTRIBUTE_GROUPS(amc6821);
|
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
|
static int amc6821_detect(
|
|
struct i2c_client *client,
|
|
struct i2c_board_info *info)
|
|
{
|
|
struct i2c_adapter *adapter = client->adapter;
|
|
int address = client->addr;
|
|
int dev_id, comp_id;
|
|
|
|
dev_dbg(&adapter->dev, "amc6821_detect called.\n");
|
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
|
|
dev_dbg(&adapter->dev,
|
|
"amc6821: I2C bus doesn't support byte mode, "
|
|
"skipping.\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_id = i2c_smbus_read_byte_data(client, AMC6821_REG_DEV_ID);
|
|
comp_id = i2c_smbus_read_byte_data(client, AMC6821_REG_COMP_ID);
|
|
if (dev_id != 0x21 || comp_id != 0x49) {
|
|
dev_dbg(&adapter->dev,
|
|
"amc6821: detection failed at 0x%02x.\n",
|
|
address);
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* Bit 7 of the address register is ignored, so we can check the
|
|
* ID registers again
|
|
*/
|
|
dev_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_DEV_ID);
|
|
comp_id = i2c_smbus_read_byte_data(client, 0x80 | AMC6821_REG_COMP_ID);
|
|
if (dev_id != 0x21 || comp_id != 0x49) {
|
|
dev_dbg(&adapter->dev,
|
|
"amc6821: detection failed at 0x%02x.\n",
|
|
address);
|
|
return -ENODEV;
|
|
}
|
|
|
|
dev_info(&adapter->dev, "amc6821: chip found at 0x%02x.\n", address);
|
|
strlcpy(info->type, "amc6821", I2C_NAME_SIZE);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int amc6821_init_client(struct i2c_client *client)
|
|
{
|
|
int config;
|
|
int err = -EIO;
|
|
|
|
if (init) {
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4);
|
|
|
|
if (config < 0) {
|
|
dev_err(&client->dev,
|
|
"Error reading configuration register, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
config |= AMC6821_CONF4_MODE;
|
|
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF4,
|
|
config)) {
|
|
dev_err(&client->dev,
|
|
"Configuration register write error, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF3);
|
|
|
|
if (config < 0) {
|
|
dev_err(&client->dev,
|
|
"Error reading configuration register, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
dev_info(&client->dev, "Revision %d\n", config & 0x0f);
|
|
|
|
config &= ~AMC6821_CONF3_THERM_FAN_EN;
|
|
|
|
if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF3,
|
|
config)) {
|
|
dev_err(&client->dev,
|
|
"Configuration register write error, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF2);
|
|
|
|
if (config < 0) {
|
|
dev_err(&client->dev,
|
|
"Error reading configuration register, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
config &= ~AMC6821_CONF2_RTFIE;
|
|
config &= ~AMC6821_CONF2_LTOIE;
|
|
config &= ~AMC6821_CONF2_RTOIE;
|
|
if (i2c_smbus_write_byte_data(client,
|
|
AMC6821_REG_CONF2, config)) {
|
|
dev_err(&client->dev,
|
|
"Configuration register write error, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1);
|
|
|
|
if (config < 0) {
|
|
dev_err(&client->dev,
|
|
"Error reading configuration register, aborting.\n");
|
|
return err;
|
|
}
|
|
|
|
config &= ~AMC6821_CONF1_THERMOVIE;
|
|
config &= ~AMC6821_CONF1_FANIE;
|
|
config |= AMC6821_CONF1_START;
|
|
if (pwminv)
|
|
config |= AMC6821_CONF1_PWMINV;
|
|
else
|
|
config &= ~AMC6821_CONF1_PWMINV;
|
|
|
|
if (i2c_smbus_write_byte_data(
|
|
client, AMC6821_REG_CONF1, config)) {
|
|
dev_err(&client->dev,
|
|
"Configuration register write error, aborting.\n");
|
|
return err;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int amc6821_probe(struct i2c_client *client,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct device *dev = &client->dev;
|
|
struct amc6821_data *data;
|
|
struct device *hwmon_dev;
|
|
int err;
|
|
|
|
data = devm_kzalloc(dev, sizeof(struct amc6821_data), GFP_KERNEL);
|
|
if (!data)
|
|
return -ENOMEM;
|
|
|
|
data->client = client;
|
|
mutex_init(&data->update_lock);
|
|
|
|
/*
|
|
* Initialize the amc6821 chip
|
|
*/
|
|
err = amc6821_init_client(client);
|
|
if (err)
|
|
return err;
|
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name,
|
|
data,
|
|
amc6821_groups);
|
|
return PTR_ERR_OR_ZERO(hwmon_dev);
|
|
}
|
|
|
|
static const struct i2c_device_id amc6821_id[] = {
|
|
{ "amc6821", amc6821 },
|
|
{ }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, amc6821_id);
|
|
|
|
static struct i2c_driver amc6821_driver = {
|
|
.class = I2C_CLASS_HWMON,
|
|
.driver = {
|
|
.name = "amc6821",
|
|
},
|
|
.probe = amc6821_probe,
|
|
.id_table = amc6821_id,
|
|
.detect = amc6821_detect,
|
|
.address_list = normal_i2c,
|
|
};
|
|
|
|
module_i2c_driver(amc6821_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("T. Mertelj <tomaz.mertelj@guest.arnes.si>");
|
|
MODULE_DESCRIPTION("Texas Instruments amc6821 hwmon driver");
|