642 lines
20 KiB
C
642 lines
20 KiB
C
// 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 <linux@rick.claranet.de>
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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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bool valid; /* true 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 = true;
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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)
|
|
return -EINVAL;
|
|
|
|
data->vrm = val;
|
|
return count;
|
|
}
|
|
static DEVICE_ATTR_RW(vrm);
|
|
|
|
/* Alarms */
|
|
static ssize_t alarm_show(struct device *dev, struct device_attribute *attr,
|
|
char *buf)
|
|
{
|
|
struct sensor_device_attribute *sensor_attr = to_sensor_dev_attr(attr);
|
|
int nr = sensor_attr->index;
|
|
struct smsc47m192_data *data = smsc47m192_update_device(dev);
|
|
return sprintf(buf, "%u\n", (data->alarms & nr) ? 1 : 0);
|
|
}
|
|
|
|
static SENSOR_DEVICE_ATTR_RO(temp1_alarm, alarm, 0x0010);
|
|
static SENSOR_DEVICE_ATTR_RO(temp2_alarm, alarm, 0x0020);
|
|
static SENSOR_DEVICE_ATTR_RO(temp3_alarm, alarm, 0x0040);
|
|
static SENSOR_DEVICE_ATTR_RO(temp2_fault, alarm, 0x4000);
|
|
static SENSOR_DEVICE_ATTR_RO(temp3_fault, alarm, 0x8000);
|
|
static SENSOR_DEVICE_ATTR_RO(in0_alarm, alarm, 0x0001);
|
|
static SENSOR_DEVICE_ATTR_RO(in1_alarm, alarm, 0x0002);
|
|
static SENSOR_DEVICE_ATTR_RO(in2_alarm, alarm, 0x0004);
|
|
static SENSOR_DEVICE_ATTR_RO(in3_alarm, alarm, 0x0008);
|
|
static SENSOR_DEVICE_ATTR_RO(in4_alarm, alarm, 0x0100);
|
|
static SENSOR_DEVICE_ATTR_RO(in5_alarm, alarm, 0x0200);
|
|
static SENSOR_DEVICE_ATTR_RO(in6_alarm, alarm, 0x0400);
|
|
static SENSOR_DEVICE_ATTR_RO(in7_alarm, alarm, 0x0800);
|
|
|
|
static struct attribute *smsc47m192_attributes[] = {
|
|
&sensor_dev_attr_in0_input.dev_attr.attr,
|
|
&sensor_dev_attr_in0_min.dev_attr.attr,
|
|
&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;
|
|
}
|
|
|
|
strscpy(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 <linux@rick.claranet.de>");
|
|
MODULE_DESCRIPTION("SMSC47M192 driver");
|
|
MODULE_LICENSE("GPL");
|