forked from Minki/linux
hwmon: Add Nuvoton NCT7904 hwmon driver
The NCT7904D is a hardware monitor supporting up to 20 voltage sensors, internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature interface, up to 12 fan tachometer inputs, up to 4 fan control channels with SmartFan. Signed-off-by: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru> [Guenter Roeck: Fixed whitespace errors, dropped redundant comment] Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Vadim V. Vlasov
Guenter Roeck
parent
e8433b42b6
commit
9c947d25c9
60
Documentation/hwmon/nct7904
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60
Documentation/hwmon/nct7904
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@ -0,0 +1,60 @@
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Kernel driver nct7904
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====================
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Supported chip:
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* Nuvoton NCT7904D
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Prefix: nct7904
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Addresses: I2C 0x2d, 0x2e
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Datasheet: Publicly available at Nuvoton website
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http://www.nuvoton.com/
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Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>
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Description
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-----------
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The NCT7904D is a hardware monitor supporting up to 20 voltage sensors,
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internal temperature sensor, Intel PECI and AMD SB-TSI CPU temperature
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interface, up to 12 fan tachometer inputs, up to 4 fan control channels
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with SmartFan.
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Sysfs entries
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-------------
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Currently, the driver supports only the following features:
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in[1-20]_input Input voltage measurements (mV)
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fan[1-12]_input Fan tachometer measurements (rpm)
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temp1_input Local temperature (1/1000 degree,
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0.125 degree resolution)
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temp[2-9]_input CPU temperatures (1/1000 degree,
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0.125 degree resolution)
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fan[1-4]_mode R/W, 0/1 for manual or SmartFan mode
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Setting SmartFan mode is supported only if it has been
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previously configured by BIOS (or configuration EEPROM)
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fan[1-4]_pwm R/O in SmartFan mode, R/W in manual control mode
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The driver checks sensor control registers and does not export the sensors
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that are not enabled. Anyway, a sensor that is enabled may actually be not
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connected and thus provide zero readings.
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Limitations
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-----------
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The following features are not supported in current version:
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- SmartFan control
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- Watchdog
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- GPIO
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- external temperature sensors
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- SMI
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- min/max values
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- many other...
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@ -1145,6 +1145,16 @@ config SENSORS_NCT7802
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This driver can also be built as a module. If so, the module
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will be called nct7802.
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config SENSORS_NCT7904
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tristate "Nuvoton NCT7904"
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depends on I2C
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help
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If you say yes here you get support for the Nuvoton NCT7904
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hardware monitoring chip, including manual fan speed control.
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This driver can also be built as a module. If so, the module
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will be called nct7904.
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config SENSORS_PCF8591
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tristate "Philips PCF8591 ADC/DAC"
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depends on I2C
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@ -120,6 +120,7 @@ obj-$(CONFIG_SENSORS_MENF21BMC_HWMON) += menf21bmc_hwmon.o
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obj-$(CONFIG_SENSORS_NCT6683) += nct6683.o
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obj-$(CONFIG_SENSORS_NCT6775) += nct6775.o
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obj-$(CONFIG_SENSORS_NCT7802) += nct7802.o
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obj-$(CONFIG_SENSORS_NCT7904) += nct7904.o
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obj-$(CONFIG_SENSORS_NTC_THERMISTOR) += ntc_thermistor.o
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obj-$(CONFIG_SENSORS_PC87360) += pc87360.o
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obj-$(CONFIG_SENSORS_PC87427) += pc87427.o
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592
drivers/hwmon/nct7904.c
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592
drivers/hwmon/nct7904.c
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@ -0,0 +1,592 @@
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/*
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* nct7904.c - driver for Nuvoton NCT7904D.
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*
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* Copyright (c) 2015 Kontron
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* Author: Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/init.h>
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#include <linux/i2c.h>
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#include <linux/mutex.h>
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#include <linux/hwmon.h>
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#include <linux/hwmon-sysfs.h>
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#define VENDOR_ID_REG 0x7A /* Any bank */
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#define NUVOTON_ID 0x50
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#define CHIP_ID_REG 0x7B /* Any bank */
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#define NCT7904_ID 0xC5
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#define DEVICE_ID_REG 0x7C /* Any bank */
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#define BANK_SEL_REG 0xFF
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#define BANK_0 0x00
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#define BANK_1 0x01
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#define BANK_2 0x02
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#define BANK_3 0x03
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#define BANK_4 0x04
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#define BANK_MAX 0x04
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#define FANIN_MAX 12 /* Counted from 1 */
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#define VSEN_MAX 21 /* VSEN1..14, 3VDD, VBAT, V3VSB,
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LTD (not a voltage), VSEN17..19 */
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#define FANCTL_MAX 4 /* Counted from 1 */
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#define TCPU_MAX 8 /* Counted from 1 */
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#define TEMP_MAX 4 /* Counted from 1 */
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#define VT_ADC_CTRL0_REG 0x20 /* Bank 0 */
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#define VT_ADC_CTRL1_REG 0x21 /* Bank 0 */
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#define VT_ADC_CTRL2_REG 0x22 /* Bank 0 */
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#define FANIN_CTRL0_REG 0x24
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#define FANIN_CTRL1_REG 0x25
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#define DTS_T_CTRL0_REG 0x26
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#define DTS_T_CTRL1_REG 0x27
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#define VT_ADC_MD_REG 0x2E
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#define VSEN1_HV_REG 0x40 /* Bank 0; 2 regs (HV/LV) per sensor */
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#define TEMP_CH1_HV_REG 0x42 /* Bank 0; same as VSEN2_HV */
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#define LTD_HV_REG 0x62 /* Bank 0; 2 regs in VSEN range */
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#define FANIN1_HV_REG 0x80 /* Bank 0; 2 regs (HV/LV) per sensor */
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#define T_CPU1_HV_REG 0xA0 /* Bank 0; 2 regs (HV/LV) per sensor */
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#define PRTS_REG 0x03 /* Bank 2 */
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#define FANCTL1_FMR_REG 0x00 /* Bank 3; 1 reg per channel */
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#define FANCTL1_OUT_REG 0x10 /* Bank 3; 1 reg per channel */
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static const unsigned short normal_i2c[] = {
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0x2d, 0x2e, I2C_CLIENT_END
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};
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struct nct7904_data {
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struct i2c_client *client;
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struct mutex bank_lock;
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int bank_sel;
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u32 fanin_mask;
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u32 vsen_mask;
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u32 tcpu_mask;
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u8 fan_mode[FANCTL_MAX];
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};
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/* Access functions */
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static int nct7904_bank_lock(struct nct7904_data *data, unsigned bank)
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{
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int ret;
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mutex_lock(&data->bank_lock);
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if (data->bank_sel == bank)
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return 0;
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ret = i2c_smbus_write_byte_data(data->client, BANK_SEL_REG, bank);
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if (ret == 0)
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data->bank_sel = bank;
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else
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data->bank_sel = -1;
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return ret;
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}
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static inline void nct7904_bank_release(struct nct7904_data *data)
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{
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mutex_unlock(&data->bank_lock);
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}
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/* Read 1-byte register. Returns unsigned reg or -ERRNO on error. */
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static int nct7904_read_reg(struct nct7904_data *data,
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unsigned bank, unsigned reg)
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{
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struct i2c_client *client = data->client;
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int ret;
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ret = nct7904_bank_lock(data, bank);
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if (ret == 0)
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ret = i2c_smbus_read_byte_data(client, reg);
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nct7904_bank_release(data);
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return ret;
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}
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/*
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* Read 2-byte register. Returns register in big-endian format or
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* -ERRNO on error.
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*/
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static int nct7904_read_reg16(struct nct7904_data *data,
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unsigned bank, unsigned reg)
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{
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struct i2c_client *client = data->client;
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int ret, hi;
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ret = nct7904_bank_lock(data, bank);
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if (ret == 0) {
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ret = i2c_smbus_read_byte_data(client, reg);
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if (ret >= 0) {
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hi = ret;
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ret = i2c_smbus_read_byte_data(client, reg + 1);
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if (ret >= 0)
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ret |= hi << 8;
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}
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}
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nct7904_bank_release(data);
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return ret;
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}
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/* Write 1-byte register. Returns 0 or -ERRNO on error. */
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static int nct7904_write_reg(struct nct7904_data *data,
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unsigned bank, unsigned reg, u8 val)
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{
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struct i2c_client *client = data->client;
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int ret;
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ret = nct7904_bank_lock(data, bank);
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if (ret == 0)
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ret = i2c_smbus_write_byte_data(client, reg, val);
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nct7904_bank_release(data);
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return ret;
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}
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/* FANIN ATTR */
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static ssize_t show_fan(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct nct7904_data *data = dev_get_drvdata(dev);
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int ret;
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unsigned cnt, rpm;
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ret = nct7904_read_reg16(data, BANK_0, FANIN1_HV_REG + index * 2);
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if (ret < 0)
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return ret;
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cnt = ((ret & 0xff00) >> 3) | (ret & 0x1f);
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if (cnt == 0x1fff)
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rpm = 0;
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else
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rpm = 1350000 / cnt;
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return sprintf(buf, "%u\n", rpm);
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}
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static umode_t nct7904_fanin_is_visible(struct kobject *kobj,
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struct attribute *a, int n)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct nct7904_data *data = dev_get_drvdata(dev);
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if (data->fanin_mask & (1 << n))
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return a->mode;
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return 0;
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}
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static SENSOR_DEVICE_ATTR(fan1_input, S_IRUGO, show_fan, NULL, 0);
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static SENSOR_DEVICE_ATTR(fan2_input, S_IRUGO, show_fan, NULL, 1);
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static SENSOR_DEVICE_ATTR(fan3_input, S_IRUGO, show_fan, NULL, 2);
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static SENSOR_DEVICE_ATTR(fan4_input, S_IRUGO, show_fan, NULL, 3);
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static SENSOR_DEVICE_ATTR(fan5_input, S_IRUGO, show_fan, NULL, 4);
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static SENSOR_DEVICE_ATTR(fan6_input, S_IRUGO, show_fan, NULL, 5);
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static SENSOR_DEVICE_ATTR(fan7_input, S_IRUGO, show_fan, NULL, 6);
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static SENSOR_DEVICE_ATTR(fan8_input, S_IRUGO, show_fan, NULL, 7);
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static SENSOR_DEVICE_ATTR(fan9_input, S_IRUGO, show_fan, NULL, 8);
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static SENSOR_DEVICE_ATTR(fan10_input, S_IRUGO, show_fan, NULL, 9);
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static SENSOR_DEVICE_ATTR(fan11_input, S_IRUGO, show_fan, NULL, 10);
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static SENSOR_DEVICE_ATTR(fan12_input, S_IRUGO, show_fan, NULL, 11);
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static struct attribute *nct7904_fanin_attrs[] = {
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&sensor_dev_attr_fan1_input.dev_attr.attr,
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&sensor_dev_attr_fan2_input.dev_attr.attr,
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&sensor_dev_attr_fan3_input.dev_attr.attr,
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&sensor_dev_attr_fan4_input.dev_attr.attr,
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&sensor_dev_attr_fan5_input.dev_attr.attr,
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&sensor_dev_attr_fan6_input.dev_attr.attr,
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&sensor_dev_attr_fan7_input.dev_attr.attr,
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&sensor_dev_attr_fan8_input.dev_attr.attr,
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&sensor_dev_attr_fan9_input.dev_attr.attr,
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&sensor_dev_attr_fan10_input.dev_attr.attr,
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&sensor_dev_attr_fan11_input.dev_attr.attr,
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&sensor_dev_attr_fan12_input.dev_attr.attr,
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NULL
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};
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static const struct attribute_group nct7904_fanin_group = {
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.attrs = nct7904_fanin_attrs,
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.is_visible = nct7904_fanin_is_visible,
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};
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/* VSEN ATTR */
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static ssize_t show_voltage(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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int index = to_sensor_dev_attr(devattr)->index;
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struct nct7904_data *data = dev_get_drvdata(dev);
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int ret;
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int volt;
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ret = nct7904_read_reg16(data, BANK_0, VSEN1_HV_REG + index * 2);
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if (ret < 0)
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return ret;
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volt = ((ret & 0xff00) >> 5) | (ret & 0x7);
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if (index < 14)
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volt *= 2; /* 0.002V scale */
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else
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volt *= 6; /* 0.006V scale */
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return sprintf(buf, "%d\n", volt);
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}
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static ssize_t show_ltemp(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct nct7904_data *data = dev_get_drvdata(dev);
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int ret;
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int temp;
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ret = nct7904_read_reg16(data, BANK_0, LTD_HV_REG);
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if (ret < 0)
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return ret;
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temp = ((ret & 0xff00) >> 5) | (ret & 0x7);
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temp = sign_extend32(temp, 10) * 125;
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return sprintf(buf, "%d\n", temp);
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}
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static umode_t nct7904_vsen_is_visible(struct kobject *kobj,
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struct attribute *a, int n)
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{
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struct device *dev = container_of(kobj, struct device, kobj);
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struct nct7904_data *data = dev_get_drvdata(dev);
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if (data->vsen_mask & (1 << n))
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return a->mode;
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return 0;
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}
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static SENSOR_DEVICE_ATTR(in1_input, S_IRUGO, show_voltage, NULL, 0);
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static SENSOR_DEVICE_ATTR(in2_input, S_IRUGO, show_voltage, NULL, 1);
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static SENSOR_DEVICE_ATTR(in3_input, S_IRUGO, show_voltage, NULL, 2);
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static SENSOR_DEVICE_ATTR(in4_input, S_IRUGO, show_voltage, NULL, 3);
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static SENSOR_DEVICE_ATTR(in5_input, S_IRUGO, show_voltage, NULL, 4);
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static SENSOR_DEVICE_ATTR(in6_input, S_IRUGO, show_voltage, NULL, 5);
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static SENSOR_DEVICE_ATTR(in7_input, S_IRUGO, show_voltage, NULL, 6);
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static SENSOR_DEVICE_ATTR(in8_input, S_IRUGO, show_voltage, NULL, 7);
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static SENSOR_DEVICE_ATTR(in9_input, S_IRUGO, show_voltage, NULL, 8);
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static SENSOR_DEVICE_ATTR(in10_input, S_IRUGO, show_voltage, NULL, 9);
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static SENSOR_DEVICE_ATTR(in11_input, S_IRUGO, show_voltage, NULL, 10);
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static SENSOR_DEVICE_ATTR(in12_input, S_IRUGO, show_voltage, NULL, 11);
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static SENSOR_DEVICE_ATTR(in13_input, S_IRUGO, show_voltage, NULL, 12);
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static SENSOR_DEVICE_ATTR(in14_input, S_IRUGO, show_voltage, NULL, 13);
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/*
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* Next 3 voltage sensors have specific names in the Nuvoton doc
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* (3VDD, VBAT, 3VSB) but we use vacant numbers for them.
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*/
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static SENSOR_DEVICE_ATTR(in15_input, S_IRUGO, show_voltage, NULL, 14);
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static SENSOR_DEVICE_ATTR(in16_input, S_IRUGO, show_voltage, NULL, 15);
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static SENSOR_DEVICE_ATTR(in20_input, S_IRUGO, show_voltage, NULL, 16);
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/* This is not a voltage, but a local temperature sensor. */
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static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_ltemp, NULL, 0);
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static SENSOR_DEVICE_ATTR(in17_input, S_IRUGO, show_voltage, NULL, 18);
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static SENSOR_DEVICE_ATTR(in18_input, S_IRUGO, show_voltage, NULL, 19);
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static SENSOR_DEVICE_ATTR(in19_input, S_IRUGO, show_voltage, NULL, 20);
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static struct attribute *nct7904_vsen_attrs[] = {
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&sensor_dev_attr_in1_input.dev_attr.attr,
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&sensor_dev_attr_in2_input.dev_attr.attr,
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&sensor_dev_attr_in3_input.dev_attr.attr,
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&sensor_dev_attr_in4_input.dev_attr.attr,
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&sensor_dev_attr_in5_input.dev_attr.attr,
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&sensor_dev_attr_in6_input.dev_attr.attr,
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&sensor_dev_attr_in7_input.dev_attr.attr,
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&sensor_dev_attr_in8_input.dev_attr.attr,
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&sensor_dev_attr_in9_input.dev_attr.attr,
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&sensor_dev_attr_in10_input.dev_attr.attr,
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&sensor_dev_attr_in11_input.dev_attr.attr,
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&sensor_dev_attr_in12_input.dev_attr.attr,
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&sensor_dev_attr_in13_input.dev_attr.attr,
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&sensor_dev_attr_in14_input.dev_attr.attr,
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&sensor_dev_attr_in15_input.dev_attr.attr,
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&sensor_dev_attr_in16_input.dev_attr.attr,
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&sensor_dev_attr_in20_input.dev_attr.attr,
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&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in17_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in18_input.dev_attr.attr,
|
||||
&sensor_dev_attr_in19_input.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group nct7904_vsen_group = {
|
||||
.attrs = nct7904_vsen_attrs,
|
||||
.is_visible = nct7904_vsen_is_visible,
|
||||
};
|
||||
|
||||
/* CPU_TEMP ATTR */
|
||||
static ssize_t show_tcpu(struct device *dev,
|
||||
struct device_attribute *devattr, char *buf)
|
||||
{
|
||||
int index = to_sensor_dev_attr(devattr)->index;
|
||||
struct nct7904_data *data = dev_get_drvdata(dev);
|
||||
int ret;
|
||||
int temp;
|
||||
|
||||
ret = nct7904_read_reg16(data, BANK_0, T_CPU1_HV_REG + index * 2);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
temp = ((ret & 0xff00) >> 5) | (ret & 0x7);
|
||||
temp = sign_extend32(temp, 10) * 125;
|
||||
return sprintf(buf, "%d\n", temp);
|
||||
}
|
||||
|
||||
static umode_t nct7904_tcpu_is_visible(struct kobject *kobj,
|
||||
struct attribute *a, int n)
|
||||
{
|
||||
struct device *dev = container_of(kobj, struct device, kobj);
|
||||
struct nct7904_data *data = dev_get_drvdata(dev);
|
||||
|
||||
if (data->tcpu_mask & (1 << n))
|
||||
return a->mode;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* "temp1_input" reserved for local temp */
|
||||
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_tcpu, NULL, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_tcpu, NULL, 1);
|
||||
static SENSOR_DEVICE_ATTR(temp4_input, S_IRUGO, show_tcpu, NULL, 2);
|
||||
static SENSOR_DEVICE_ATTR(temp5_input, S_IRUGO, show_tcpu, NULL, 3);
|
||||
static SENSOR_DEVICE_ATTR(temp6_input, S_IRUGO, show_tcpu, NULL, 4);
|
||||
static SENSOR_DEVICE_ATTR(temp7_input, S_IRUGO, show_tcpu, NULL, 5);
|
||||
static SENSOR_DEVICE_ATTR(temp8_input, S_IRUGO, show_tcpu, NULL, 6);
|
||||
static SENSOR_DEVICE_ATTR(temp9_input, S_IRUGO, show_tcpu, NULL, 7);
|
||||
|
||||
static struct attribute *nct7904_tcpu_attrs[] = {
|
||||
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp4_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp5_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp6_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp7_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp8_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp9_input.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group nct7904_tcpu_group = {
|
||||
.attrs = nct7904_tcpu_attrs,
|
||||
.is_visible = nct7904_tcpu_is_visible,
|
||||
};
|
||||
|
||||
/* PWM ATTR */
|
||||
static ssize_t store_pwm(struct device *dev, struct device_attribute *devattr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
int index = to_sensor_dev_attr(devattr)->index;
|
||||
struct nct7904_data *data = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
int ret;
|
||||
|
||||
if (kstrtoul(buf, 10, &val) < 0)
|
||||
return -EINVAL;
|
||||
if (val > 255)
|
||||
return -EINVAL;
|
||||
|
||||
ret = nct7904_write_reg(data, BANK_3, FANCTL1_OUT_REG + index, val);
|
||||
|
||||
return ret ? ret : count;
|
||||
}
|
||||
|
||||
static ssize_t show_pwm(struct device *dev,
|
||||
struct device_attribute *devattr, char *buf)
|
||||
{
|
||||
int index = to_sensor_dev_attr(devattr)->index;
|
||||
struct nct7904_data *data = dev_get_drvdata(dev);
|
||||
int val;
|
||||
|
||||
val = nct7904_read_reg(data, BANK_3, FANCTL1_OUT_REG + index);
|
||||
if (val < 0)
|
||||
return val;
|
||||
|
||||
return sprintf(buf, "%d\n", val);
|
||||
}
|
||||
|
||||
static ssize_t store_mode(struct device *dev, struct device_attribute *devattr,
|
||||
const char *buf, size_t count)
|
||||
{
|
||||
int index = to_sensor_dev_attr(devattr)->index;
|
||||
struct nct7904_data *data = dev_get_drvdata(dev);
|
||||
unsigned long val;
|
||||
int ret;
|
||||
|
||||
if (kstrtoul(buf, 10, &val) < 0)
|
||||
return -EINVAL;
|
||||
if (val > 1 || (val && !data->fan_mode[index]))
|
||||
return -EINVAL;
|
||||
|
||||
ret = nct7904_write_reg(data, BANK_3, FANCTL1_FMR_REG + index,
|
||||
val ? data->fan_mode[index] : 0);
|
||||
|
||||
return ret ? ret : count;
|
||||
}
|
||||
|
||||
/* Return 0 for manual mode or 1 for SmartFan mode */
|
||||
static ssize_t show_mode(struct device *dev,
|
||||
struct device_attribute *devattr, char *buf)
|
||||
{
|
||||
int index = to_sensor_dev_attr(devattr)->index;
|
||||
struct nct7904_data *data = dev_get_drvdata(dev);
|
||||
int val;
|
||||
|
||||
val = nct7904_read_reg(data, BANK_3, FANCTL1_FMR_REG + index);
|
||||
if (val < 0)
|
||||
return val;
|
||||
|
||||
return sprintf(buf, "%d\n", val ? 1 : 0);
|
||||
}
|
||||
|
||||
/* 2 attributes per channel: pwm and mode */
|
||||
static SENSOR_DEVICE_ATTR(fan1_pwm, S_IRUGO | S_IWUSR,
|
||||
show_pwm, store_pwm, 0);
|
||||
static SENSOR_DEVICE_ATTR(fan1_mode, S_IRUGO | S_IWUSR,
|
||||
show_mode, store_mode, 0);
|
||||
static SENSOR_DEVICE_ATTR(fan2_pwm, S_IRUGO | S_IWUSR,
|
||||
show_pwm, store_pwm, 1);
|
||||
static SENSOR_DEVICE_ATTR(fan2_mode, S_IRUGO | S_IWUSR,
|
||||
show_mode, store_mode, 1);
|
||||
static SENSOR_DEVICE_ATTR(fan3_pwm, S_IRUGO | S_IWUSR,
|
||||
show_pwm, store_pwm, 2);
|
||||
static SENSOR_DEVICE_ATTR(fan3_mode, S_IRUGO | S_IWUSR,
|
||||
show_mode, store_mode, 2);
|
||||
static SENSOR_DEVICE_ATTR(fan4_pwm, S_IRUGO | S_IWUSR,
|
||||
show_pwm, store_pwm, 3);
|
||||
static SENSOR_DEVICE_ATTR(fan4_mode, S_IRUGO | S_IWUSR,
|
||||
show_mode, store_mode, 3);
|
||||
|
||||
static struct attribute *nct7904_fanctl_attrs[] = {
|
||||
&sensor_dev_attr_fan1_pwm.dev_attr.attr,
|
||||
&sensor_dev_attr_fan1_mode.dev_attr.attr,
|
||||
&sensor_dev_attr_fan2_pwm.dev_attr.attr,
|
||||
&sensor_dev_attr_fan2_mode.dev_attr.attr,
|
||||
&sensor_dev_attr_fan3_pwm.dev_attr.attr,
|
||||
&sensor_dev_attr_fan3_mode.dev_attr.attr,
|
||||
&sensor_dev_attr_fan4_pwm.dev_attr.attr,
|
||||
&sensor_dev_attr_fan4_mode.dev_attr.attr,
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct attribute_group nct7904_fanctl_group = {
|
||||
.attrs = nct7904_fanctl_attrs,
|
||||
};
|
||||
|
||||
static const struct attribute_group *nct7904_groups[] = {
|
||||
&nct7904_fanin_group,
|
||||
&nct7904_vsen_group,
|
||||
&nct7904_tcpu_group,
|
||||
&nct7904_fanctl_group,
|
||||
NULL
|
||||
};
|
||||
|
||||
/* Return 0 if detection is successful, -ENODEV otherwise */
|
||||
static int nct7904_detect(struct i2c_client *client,
|
||||
struct i2c_board_info *info)
|
||||
{
|
||||
struct i2c_adapter *adapter = client->adapter;
|
||||
|
||||
if (!i2c_check_functionality(adapter,
|
||||
I2C_FUNC_SMBUS_READ_BYTE |
|
||||
I2C_FUNC_SMBUS_WRITE_BYTE_DATA))
|
||||
return -ENODEV;
|
||||
|
||||
/* Determine the chip type. */
|
||||
if (i2c_smbus_read_byte_data(client, VENDOR_ID_REG) != NUVOTON_ID ||
|
||||
i2c_smbus_read_byte_data(client, CHIP_ID_REG) != NCT7904_ID ||
|
||||
(i2c_smbus_read_byte_data(client, DEVICE_ID_REG) & 0xf0) != 0x50)
|
||||
return -ENODEV;
|
||||
|
||||
strlcpy(info->type, "nct7904", I2C_NAME_SIZE);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nct7904_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
struct nct7904_data *data;
|
||||
struct device *hwmon_dev;
|
||||
struct device *dev = &client->dev;
|
||||
int ret, i;
|
||||
u32 mask;
|
||||
|
||||
data = devm_kzalloc(dev, sizeof(struct nct7904_data), GFP_KERNEL);
|
||||
if (!data)
|
||||
return -ENOMEM;
|
||||
|
||||
data->client = client;
|
||||
mutex_init(&data->bank_lock);
|
||||
data->bank_sel = -1;
|
||||
|
||||
/* Setup sensor groups. */
|
||||
/* FANIN attributes */
|
||||
ret = nct7904_read_reg16(data, BANK_0, FANIN_CTRL0_REG);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
data->fanin_mask = (ret >> 8) | ((ret & 0xff) << 8);
|
||||
|
||||
/*
|
||||
* VSEN attributes
|
||||
*
|
||||
* Note: voltage sensors overlap with external temperature
|
||||
* sensors. So, if we ever decide to support the latter
|
||||
* we will have to adjust 'vsen_mask' accordingly.
|
||||
*/
|
||||
mask = 0;
|
||||
ret = nct7904_read_reg16(data, BANK_0, VT_ADC_CTRL0_REG);
|
||||
if (ret >= 0)
|
||||
mask = (ret >> 8) | ((ret & 0xff) << 8);
|
||||
ret = nct7904_read_reg(data, BANK_0, VT_ADC_CTRL2_REG);
|
||||
if (ret >= 0)
|
||||
mask |= (ret << 16);
|
||||
data->vsen_mask = mask;
|
||||
|
||||
/* CPU_TEMP attributes */
|
||||
ret = nct7904_read_reg16(data, BANK_0, DTS_T_CTRL0_REG);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
data->tcpu_mask = ((ret >> 8) & 0xf) | ((ret & 0xf) << 4);
|
||||
|
||||
for (i = 0; i < FANCTL_MAX; i++) {
|
||||
ret = nct7904_read_reg(data, BANK_3, FANCTL1_FMR_REG + i);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
data->fan_mode[i] = ret;
|
||||
}
|
||||
|
||||
hwmon_dev =
|
||||
devm_hwmon_device_register_with_groups(dev, client->name, data,
|
||||
nct7904_groups);
|
||||
return PTR_ERR_OR_ZERO(hwmon_dev);
|
||||
}
|
||||
|
||||
static const struct i2c_device_id nct7904_id[] = {
|
||||
{"nct7904", 0},
|
||||
{}
|
||||
};
|
||||
|
||||
static struct i2c_driver nct7904_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "nct7904",
|
||||
},
|
||||
.probe = nct7904_probe,
|
||||
.id_table = nct7904_id,
|
||||
.detect = nct7904_detect,
|
||||
.address_list = normal_i2c,
|
||||
};
|
||||
|
||||
module_i2c_driver(nct7904_driver);
|
||||
|
||||
MODULE_AUTHOR("Vadim V. Vlasov <vvlasov@dev.rtsoft.ru>");
|
||||
MODULE_DESCRIPTION("Hwmon driver for NUVOTON NCT7904");
|
||||
MODULE_LICENSE("GPL");
|
||||
Loading…
Reference in New Issue
Block a user