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641 lines
20 KiB
641 lines
20 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* smsc47m192.c - Support for hardware monitoring block of |
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* SMSC LPC47M192 and compatible Super I/O chips |
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* |
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* Copyright (C) 2006 Hartmut Rick <[email protected]> |
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* |
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* Derived from lm78.c and other chip drivers. |
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*/ |
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#include <linux/module.h> |
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#include <linux/init.h> |
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#include <linux/slab.h> |
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#include <linux/jiffies.h> |
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#include <linux/i2c.h> |
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#include <linux/hwmon.h> |
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#include <linux/hwmon-sysfs.h> |
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#include <linux/hwmon-vid.h> |
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#include <linux/err.h> |
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#include <linux/sysfs.h> |
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#include <linux/mutex.h> |
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/* Addresses to scan */ |
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static const unsigned short normal_i2c[] = { 0x2c, 0x2d, I2C_CLIENT_END }; |
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/* SMSC47M192 registers */ |
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#define SMSC47M192_REG_IN(nr) ((nr) < 6 ? (0x20 + (nr)) : \ |
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(0x50 + (nr) - 6)) |
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#define SMSC47M192_REG_IN_MAX(nr) ((nr) < 6 ? (0x2b + (nr) * 2) : \ |
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(0x54 + (((nr) - 6) * 2))) |
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#define SMSC47M192_REG_IN_MIN(nr) ((nr) < 6 ? (0x2c + (nr) * 2) : \ |
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(0x55 + (((nr) - 6) * 2))) |
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static u8 SMSC47M192_REG_TEMP[3] = { 0x27, 0x26, 0x52 }; |
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static u8 SMSC47M192_REG_TEMP_MAX[3] = { 0x39, 0x37, 0x58 }; |
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static u8 SMSC47M192_REG_TEMP_MIN[3] = { 0x3A, 0x38, 0x59 }; |
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#define SMSC47M192_REG_TEMP_OFFSET(nr) ((nr) == 2 ? 0x1e : 0x1f) |
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#define SMSC47M192_REG_ALARM1 0x41 |
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#define SMSC47M192_REG_ALARM2 0x42 |
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#define SMSC47M192_REG_VID 0x47 |
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#define SMSC47M192_REG_VID4 0x49 |
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#define SMSC47M192_REG_CONFIG 0x40 |
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#define SMSC47M192_REG_SFR 0x4f |
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#define SMSC47M192_REG_COMPANY_ID 0x3e |
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#define SMSC47M192_REG_VERSION 0x3f |
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/* generalised scaling with integer rounding */ |
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static inline int SCALE(long val, int mul, int div) |
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{ |
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if (val < 0) |
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return (val * mul - div / 2) / div; |
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else |
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return (val * mul + div / 2) / div; |
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} |
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/* Conversions */ |
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/* smsc47m192 internally scales voltage measurements */ |
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static const u16 nom_mv[] = { 2500, 2250, 3300, 5000, 12000, 3300, 1500, 1800 }; |
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static inline unsigned int IN_FROM_REG(u8 reg, int n) |
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{ |
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return SCALE(reg, nom_mv[n], 192); |
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} |
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static inline u8 IN_TO_REG(unsigned long val, int n) |
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{ |
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val = clamp_val(val, 0, nom_mv[n] * 255 / 192); |
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return SCALE(val, 192, nom_mv[n]); |
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} |
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/* |
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* TEMP: 0.001 degC units (-128C to +127C) |
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* REG: 1C/bit, two's complement |
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*/ |
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static inline s8 TEMP_TO_REG(long val) |
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{ |
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return SCALE(clamp_val(val, -128000, 127000), 1, 1000); |
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} |
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static inline int TEMP_FROM_REG(s8 val) |
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{ |
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return val * 1000; |
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} |
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struct smsc47m192_data { |
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struct i2c_client *client; |
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const struct attribute_group *groups[3]; |
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struct mutex update_lock; |
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char valid; /* !=0 if following fields are valid */ |
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unsigned long last_updated; /* In jiffies */ |
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u8 in[8]; /* Register value */ |
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u8 in_max[8]; /* Register value */ |
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u8 in_min[8]; /* Register value */ |
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s8 temp[3]; /* Register value */ |
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s8 temp_max[3]; /* Register value */ |
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s8 temp_min[3]; /* Register value */ |
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s8 temp_offset[3]; /* Register value */ |
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u16 alarms; /* Register encoding, combined */ |
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u8 vid; /* Register encoding, combined */ |
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u8 vrm; |
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}; |
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static struct smsc47m192_data *smsc47m192_update_device(struct device *dev) |
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{ |
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struct smsc47m192_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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int i, config; |
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mutex_lock(&data->update_lock); |
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if (time_after(jiffies, data->last_updated + HZ + HZ / 2) |
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|| !data->valid) { |
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u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); |
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dev_dbg(&client->dev, "Starting smsc47m192 update\n"); |
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for (i = 0; i <= 7; i++) { |
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data->in[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_IN(i)); |
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data->in_min[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_IN_MIN(i)); |
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data->in_max[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_IN_MAX(i)); |
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} |
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for (i = 0; i < 3; i++) { |
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data->temp[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_TEMP[i]); |
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data->temp_max[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_TEMP_MAX[i]); |
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data->temp_min[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_TEMP_MIN[i]); |
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} |
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for (i = 1; i < 3; i++) |
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data->temp_offset[i] = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_TEMP_OFFSET(i)); |
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/* |
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* first offset is temp_offset[0] if SFR bit 4 is set, |
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* temp_offset[1] otherwise |
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*/ |
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if (sfr & 0x10) { |
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data->temp_offset[0] = data->temp_offset[1]; |
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data->temp_offset[1] = 0; |
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} else |
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data->temp_offset[0] = 0; |
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data->vid = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VID) |
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& 0x0f; |
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config = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_CONFIG); |
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if (config & 0x20) |
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data->vid |= (i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_VID4) & 0x01) << 4; |
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data->alarms = i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_ALARM1) | |
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(i2c_smbus_read_byte_data(client, |
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SMSC47M192_REG_ALARM2) << 8); |
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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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/* Voltages */ |
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static ssize_t in_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in[nr], nr)); |
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} |
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static ssize_t in_min_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_min[nr], nr)); |
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} |
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static ssize_t in_max_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", IN_FROM_REG(data->in_max[nr], nr)); |
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} |
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static ssize_t in_min_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->in_min[nr] = IN_TO_REG(val, nr); |
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i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MIN(nr), |
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data->in_min[nr]); |
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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 in_max_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->in_max[nr] = IN_TO_REG(val, nr); |
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i2c_smbus_write_byte_data(client, SMSC47M192_REG_IN_MAX(nr), |
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data->in_max[nr]); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static SENSOR_DEVICE_ATTR_RO(in0_input, in, 0); |
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static SENSOR_DEVICE_ATTR_RW(in0_min, in_min, 0); |
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static SENSOR_DEVICE_ATTR_RW(in0_max, in_max, 0); |
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static SENSOR_DEVICE_ATTR_RO(in1_input, in, 1); |
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static SENSOR_DEVICE_ATTR_RW(in1_min, in_min, 1); |
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static SENSOR_DEVICE_ATTR_RW(in1_max, in_max, 1); |
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static SENSOR_DEVICE_ATTR_RO(in2_input, in, 2); |
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static SENSOR_DEVICE_ATTR_RW(in2_min, in_min, 2); |
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static SENSOR_DEVICE_ATTR_RW(in2_max, in_max, 2); |
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static SENSOR_DEVICE_ATTR_RO(in3_input, in, 3); |
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static SENSOR_DEVICE_ATTR_RW(in3_min, in_min, 3); |
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static SENSOR_DEVICE_ATTR_RW(in3_max, in_max, 3); |
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static SENSOR_DEVICE_ATTR_RO(in4_input, in, 4); |
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static SENSOR_DEVICE_ATTR_RW(in4_min, in_min, 4); |
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static SENSOR_DEVICE_ATTR_RW(in4_max, in_max, 4); |
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static SENSOR_DEVICE_ATTR_RO(in5_input, in, 5); |
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static SENSOR_DEVICE_ATTR_RW(in5_min, in_min, 5); |
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static SENSOR_DEVICE_ATTR_RW(in5_max, in_max, 5); |
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static SENSOR_DEVICE_ATTR_RO(in6_input, in, 6); |
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static SENSOR_DEVICE_ATTR_RW(in6_min, in_min, 6); |
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static SENSOR_DEVICE_ATTR_RW(in6_max, in_max, 6); |
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static SENSOR_DEVICE_ATTR_RO(in7_input, in, 7); |
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static SENSOR_DEVICE_ATTR_RW(in7_min, in_min, 7); |
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static SENSOR_DEVICE_ATTR_RW(in7_max, in_max, 7); |
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/* Temperatures */ |
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static ssize_t temp_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp[nr])); |
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} |
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static ssize_t temp_min_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_min[nr])); |
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} |
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static ssize_t temp_max_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_max[nr])); |
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} |
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static ssize_t temp_min_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_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 err; |
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err = kstrtol(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->temp_min[nr] = TEMP_TO_REG(val); |
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i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MIN[nr], |
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data->temp_min[nr]); |
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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 temp_max_store(struct device *dev, |
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struct device_attribute *attr, const char *buf, |
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size_t count) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_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 err; |
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err = kstrtol(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->temp_max[nr] = TEMP_TO_REG(val); |
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i2c_smbus_write_byte_data(client, SMSC47M192_REG_TEMP_MAX[nr], |
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data->temp_max[nr]); |
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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 temp_offset_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", TEMP_FROM_REG(data->temp_offset[nr])); |
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} |
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static ssize_t temp_offset_store(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = dev_get_drvdata(dev); |
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struct i2c_client *client = data->client; |
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u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); |
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long val; |
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int err; |
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err = kstrtol(buf, 10, &val); |
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if (err) |
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return err; |
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mutex_lock(&data->update_lock); |
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data->temp_offset[nr] = TEMP_TO_REG(val); |
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if (nr > 1) |
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i2c_smbus_write_byte_data(client, |
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SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); |
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else if (data->temp_offset[nr] != 0) { |
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/* |
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* offset[0] and offset[1] share the same register, |
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* SFR bit 4 activates offset[0] |
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*/ |
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i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, |
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(sfr & 0xef) | (nr == 0 ? 0x10 : 0)); |
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data->temp_offset[1-nr] = 0; |
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i2c_smbus_write_byte_data(client, |
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SMSC47M192_REG_TEMP_OFFSET(nr), data->temp_offset[nr]); |
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} else if ((sfr & 0x10) == (nr == 0 ? 0x10 : 0)) |
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i2c_smbus_write_byte_data(client, |
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SMSC47M192_REG_TEMP_OFFSET(nr), 0); |
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mutex_unlock(&data->update_lock); |
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return count; |
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} |
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static SENSOR_DEVICE_ATTR_RO(temp1_input, temp, 0); |
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static SENSOR_DEVICE_ATTR_RW(temp1_min, temp_min, 0); |
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static SENSOR_DEVICE_ATTR_RW(temp1_max, temp_max, 0); |
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static SENSOR_DEVICE_ATTR_RW(temp1_offset, temp_offset, 0); |
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static SENSOR_DEVICE_ATTR_RO(temp2_input, temp, 1); |
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static SENSOR_DEVICE_ATTR_RW(temp2_min, temp_min, 1); |
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static SENSOR_DEVICE_ATTR_RW(temp2_max, temp_max, 1); |
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static SENSOR_DEVICE_ATTR_RW(temp2_offset, temp_offset, 1); |
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static SENSOR_DEVICE_ATTR_RO(temp3_input, temp, 2); |
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static SENSOR_DEVICE_ATTR_RW(temp3_min, temp_min, 2); |
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static SENSOR_DEVICE_ATTR_RW(temp3_max, temp_max, 2); |
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static SENSOR_DEVICE_ATTR_RW(temp3_offset, temp_offset, 2); |
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/* VID */ |
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static ssize_t cpu0_vid_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%d\n", vid_from_reg(data->vid, data->vrm)); |
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} |
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static DEVICE_ATTR_RO(cpu0_vid); |
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static ssize_t vrm_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct smsc47m192_data *data = dev_get_drvdata(dev); |
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return sprintf(buf, "%d\n", data->vrm); |
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} |
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static ssize_t vrm_store(struct device *dev, struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct smsc47m192_data *data = dev_get_drvdata(dev); |
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unsigned long val; |
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int err; |
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err = kstrtoul(buf, 10, &val); |
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if (err) |
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return err; |
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if (val > 255) |
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return -EINVAL; |
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data->vrm = val; |
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return count; |
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} |
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static DEVICE_ATTR_RW(vrm); |
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|
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/* Alarms */ |
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static ssize_t alarm_show(struct device *dev, struct device_attribute *attr, |
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char *buf) |
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{ |
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struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr); |
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int nr = sensor_attr->index; |
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struct smsc47m192_data *data = smsc47m192_update_device(dev); |
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return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0); |
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} |
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static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0x0010); |
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static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 0x0020); |
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static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0x0040); |
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static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 0x4000); |
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static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 0x8000); |
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static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0x0001); |
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static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0x0002); |
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static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 0x0004); |
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static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 0x0008); |
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static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 0x0100); |
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static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 0x0200); |
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static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 0x0400); |
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static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm, 0x0800); |
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|
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static struct attribute *smsc47m192_attributes[] = { |
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&sensor_dev_attr_in0_input.dev_attr.attr, |
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&sensor_dev_attr_in0_min.dev_attr.attr, |
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&sensor_dev_attr_in0_max.dev_attr.attr, |
|
&sensor_dev_attr_in0_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in1_input.dev_attr.attr, |
|
&sensor_dev_attr_in1_min.dev_attr.attr, |
|
&sensor_dev_attr_in1_max.dev_attr.attr, |
|
&sensor_dev_attr_in1_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in2_input.dev_attr.attr, |
|
&sensor_dev_attr_in2_min.dev_attr.attr, |
|
&sensor_dev_attr_in2_max.dev_attr.attr, |
|
&sensor_dev_attr_in2_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in3_input.dev_attr.attr, |
|
&sensor_dev_attr_in3_min.dev_attr.attr, |
|
&sensor_dev_attr_in3_max.dev_attr.attr, |
|
&sensor_dev_attr_in3_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in5_input.dev_attr.attr, |
|
&sensor_dev_attr_in5_min.dev_attr.attr, |
|
&sensor_dev_attr_in5_max.dev_attr.attr, |
|
&sensor_dev_attr_in5_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in6_input.dev_attr.attr, |
|
&sensor_dev_attr_in6_min.dev_attr.attr, |
|
&sensor_dev_attr_in6_max.dev_attr.attr, |
|
&sensor_dev_attr_in6_alarm.dev_attr.attr, |
|
&sensor_dev_attr_in7_input.dev_attr.attr, |
|
&sensor_dev_attr_in7_min.dev_attr.attr, |
|
&sensor_dev_attr_in7_max.dev_attr.attr, |
|
&sensor_dev_attr_in7_alarm.dev_attr.attr, |
|
|
|
&sensor_dev_attr_temp1_input.dev_attr.attr, |
|
&sensor_dev_attr_temp1_max.dev_attr.attr, |
|
&sensor_dev_attr_temp1_min.dev_attr.attr, |
|
&sensor_dev_attr_temp1_offset.dev_attr.attr, |
|
&sensor_dev_attr_temp1_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp2_input.dev_attr.attr, |
|
&sensor_dev_attr_temp2_max.dev_attr.attr, |
|
&sensor_dev_attr_temp2_min.dev_attr.attr, |
|
&sensor_dev_attr_temp2_offset.dev_attr.attr, |
|
&sensor_dev_attr_temp2_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp2_fault.dev_attr.attr, |
|
&sensor_dev_attr_temp3_input.dev_attr.attr, |
|
&sensor_dev_attr_temp3_max.dev_attr.attr, |
|
&sensor_dev_attr_temp3_min.dev_attr.attr, |
|
&sensor_dev_attr_temp3_offset.dev_attr.attr, |
|
&sensor_dev_attr_temp3_alarm.dev_attr.attr, |
|
&sensor_dev_attr_temp3_fault.dev_attr.attr, |
|
|
|
&dev_attr_cpu0_vid.attr, |
|
&dev_attr_vrm.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group smsc47m192_group = { |
|
.attrs = smsc47m192_attributes, |
|
}; |
|
|
|
static struct attribute *smsc47m192_attributes_in4[] = { |
|
&sensor_dev_attr_in4_input.dev_attr.attr, |
|
&sensor_dev_attr_in4_min.dev_attr.attr, |
|
&sensor_dev_attr_in4_max.dev_attr.attr, |
|
&sensor_dev_attr_in4_alarm.dev_attr.attr, |
|
NULL |
|
}; |
|
|
|
static const struct attribute_group smsc47m192_group_in4 = { |
|
.attrs = smsc47m192_attributes_in4, |
|
}; |
|
|
|
static void smsc47m192_init_client(struct i2c_client *client) |
|
{ |
|
int i; |
|
u8 config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); |
|
u8 sfr = i2c_smbus_read_byte_data(client, SMSC47M192_REG_SFR); |
|
|
|
/* select cycle mode (pause 1 sec between updates) */ |
|
i2c_smbus_write_byte_data(client, SMSC47M192_REG_SFR, |
|
(sfr & 0xfd) | 0x02); |
|
if (!(config & 0x01)) { |
|
/* initialize alarm limits */ |
|
for (i = 0; i < 8; i++) { |
|
i2c_smbus_write_byte_data(client, |
|
SMSC47M192_REG_IN_MIN(i), 0); |
|
i2c_smbus_write_byte_data(client, |
|
SMSC47M192_REG_IN_MAX(i), 0xff); |
|
} |
|
for (i = 0; i < 3; i++) { |
|
i2c_smbus_write_byte_data(client, |
|
SMSC47M192_REG_TEMP_MIN[i], 0x80); |
|
i2c_smbus_write_byte_data(client, |
|
SMSC47M192_REG_TEMP_MAX[i], 0x7f); |
|
} |
|
|
|
/* start monitoring */ |
|
i2c_smbus_write_byte_data(client, SMSC47M192_REG_CONFIG, |
|
(config & 0xf7) | 0x01); |
|
} |
|
} |
|
|
|
/* Return 0 if detection is successful, -ENODEV otherwise */ |
|
static int smsc47m192_detect(struct i2c_client *client, |
|
struct i2c_board_info *info) |
|
{ |
|
struct i2c_adapter *adapter = client->adapter; |
|
int version; |
|
|
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) |
|
return -ENODEV; |
|
|
|
/* Detection criteria from sensors_detect script */ |
|
version = i2c_smbus_read_byte_data(client, SMSC47M192_REG_VERSION); |
|
if (i2c_smbus_read_byte_data(client, |
|
SMSC47M192_REG_COMPANY_ID) == 0x55 |
|
&& (version & 0xf0) == 0x20 |
|
&& (i2c_smbus_read_byte_data(client, |
|
SMSC47M192_REG_VID) & 0x70) == 0x00 |
|
&& (i2c_smbus_read_byte_data(client, |
|
SMSC47M192_REG_VID4) & 0xfe) == 0x80) { |
|
dev_info(&adapter->dev, |
|
"found SMSC47M192 or compatible, " |
|
"version 2, stepping A%d\n", version & 0x0f); |
|
} else { |
|
dev_dbg(&adapter->dev, |
|
"SMSC47M192 detection failed at 0x%02x\n", |
|
client->addr); |
|
return -ENODEV; |
|
} |
|
|
|
strlcpy(info->type, "smsc47m192", I2C_NAME_SIZE); |
|
|
|
return 0; |
|
} |
|
|
|
static int smsc47m192_probe(struct i2c_client *client) |
|
{ |
|
struct device *dev = &client->dev; |
|
struct device *hwmon_dev; |
|
struct smsc47m192_data *data; |
|
int config; |
|
|
|
data = devm_kzalloc(dev, sizeof(struct smsc47m192_data), GFP_KERNEL); |
|
if (!data) |
|
return -ENOMEM; |
|
|
|
data->client = client; |
|
data->vrm = vid_which_vrm(); |
|
mutex_init(&data->update_lock); |
|
|
|
/* Initialize the SMSC47M192 chip */ |
|
smsc47m192_init_client(client); |
|
|
|
/* sysfs hooks */ |
|
data->groups[0] = &smsc47m192_group; |
|
/* Pin 110 is either in4 (+12V) or VID4 */ |
|
config = i2c_smbus_read_byte_data(client, SMSC47M192_REG_CONFIG); |
|
if (!(config & 0x20)) |
|
data->groups[1] = &smsc47m192_group_in4; |
|
|
|
hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, |
|
data, data->groups); |
|
return PTR_ERR_OR_ZERO(hwmon_dev); |
|
} |
|
|
|
static const struct i2c_device_id smsc47m192_id[] = { |
|
{ "smsc47m192", 0 }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(i2c, smsc47m192_id); |
|
|
|
static struct i2c_driver smsc47m192_driver = { |
|
.class = I2C_CLASS_HWMON, |
|
.driver = { |
|
.name = "smsc47m192", |
|
}, |
|
.probe_new = smsc47m192_probe, |
|
.id_table = smsc47m192_id, |
|
.detect = smsc47m192_detect, |
|
.address_list = normal_i2c, |
|
}; |
|
|
|
module_i2c_driver(smsc47m192_driver); |
|
|
|
MODULE_AUTHOR("Hartmut Rick <[email protected]>"); |
|
MODULE_DESCRIPTION("SMSC47M192 driver"); |
|
MODULE_LICENSE("GPL");
|
|
|