forked from Minki/linux
hwmon: (lm95241) Rewrite to avoid using macros
Signed-off-by: Davide Rizzo <elpa.rizzo@gmail.com> [guenter.roeck@ericsson.com: Formatting changes] Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
This commit is contained in:
Davide Rizzo
Guenter Roeck
parent
2bfe814826
commit
0f1deb4b82
@ -1,13 +1,9 @@
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/*
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* lm95241.c - Part of lm_sensors, Linux kernel modules for hardware
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* monitoring
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* Copyright (C) 2008 Davide Rizzo <elpa-rizzo@gmail.com>
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* Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com>
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*
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* Based on the max1619 driver. The LM95241 is a sensor chip made by National
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* Semiconductors.
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* It reports up to three temperatures (its own plus up to
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* two external ones). Complete datasheet can be
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* obtained from National's website at:
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* The LM95241 is a sensor chip made by National Semiconductors.
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* It reports up to three temperatures (its own plus up to two external ones).
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* Complete datasheet can be obtained from National's website at:
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* http://www.national.com/ds.cgi/LM/LM95241.pdf
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*
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* This program is free software; you can redistribute it and/or modify
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@ -36,8 +32,10 @@
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#include <linux/mutex.h>
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#include <linux/sysfs.h>
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#define DEVNAME "lm95241"
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static const unsigned short normal_i2c[] = {
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0x19, 0x2a, 0x2b, I2C_CLIENT_END};
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0x19, 0x2a, 0x2b, I2C_CLIENT_END };
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/* LM95241 registers */
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#define LM95241_REG_R_MAN_ID 0xFE
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@ -46,7 +44,7 @@ static const unsigned short normal_i2c[] = {
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#define LM95241_REG_RW_CONFIG 0x03
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#define LM95241_REG_RW_REM_FILTER 0x06
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#define LM95241_REG_RW_TRUTHERM 0x07
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#define LM95241_REG_W_ONE_SHOT 0x0F
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#define LM95241_REG_W_ONE_SHOT 0x0F
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#define LM95241_REG_R_LOCAL_TEMPH 0x10
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#define LM95241_REG_R_REMOTE1_TEMPH 0x11
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#define LM95241_REG_R_REMOTE2_TEMPH 0x12
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@ -79,52 +77,205 @@ static const unsigned short normal_i2c[] = {
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#define MANUFACTURER_ID 0x01
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#define DEFAULT_REVISION 0xA4
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/* Conversions and various macros */
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#define TEMP_FROM_REG(val_h, val_l) (((val_h) & 0x80 ? (val_h) - 0x100 : \
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(val_h)) * 1000 + (val_l) * 1000 / 256)
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/* Functions declaration */
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static void lm95241_init_client(struct i2c_client *client);
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static struct lm95241_data *lm95241_update_device(struct device *dev);
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static const u8 lm95241_reg_address[] = {
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LM95241_REG_R_LOCAL_TEMPH,
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LM95241_REG_R_LOCAL_TEMPL,
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LM95241_REG_R_REMOTE1_TEMPH,
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LM95241_REG_R_REMOTE1_TEMPL,
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LM95241_REG_R_REMOTE2_TEMPH,
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LM95241_REG_R_REMOTE2_TEMPL
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};
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/* Client data (each client gets its own) */
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struct lm95241_data {
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struct device *hwmon_dev;
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struct mutex update_lock;
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unsigned long last_updated, interval; /* in jiffies */
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char valid; /* zero until following fields are valid */
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unsigned long last_updated, interval; /* in jiffies */
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char valid; /* zero until following fields are valid */
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/* registers values */
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u8 local_h, local_l; /* local */
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u8 remote1_h, remote1_l; /* remote1 */
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u8 remote2_h, remote2_l; /* remote2 */
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u8 temp[ARRAY_SIZE(lm95241_reg_address)];
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u8 config, model, trutherm;
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};
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/* Sysfs stuff */
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#define show_temp(value) \
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static ssize_t show_##value(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct lm95241_data *data = lm95241_update_device(dev); \
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snprintf(buf, PAGE_SIZE - 1, "%d\n", \
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TEMP_FROM_REG(data->value##_h, data->value##_l)); \
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return strlen(buf); \
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/* Conversions */
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static int TempFromReg(u8 val_h, u8 val_l)
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{
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if (val_h & 0x80)
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return val_h - 0x100;
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return val_h * 1000 + val_l * 1000 / 256;
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}
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show_temp(local);
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show_temp(remote1);
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show_temp(remote2);
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static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
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char *buf)
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static struct lm95241_data *lm95241_update_device(struct device *dev)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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mutex_lock(&data->update_lock);
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if (time_after(jiffies, data->last_updated + data->interval) ||
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!data->valid) {
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int i;
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dev_dbg(&client->dev, "Updating lm95241 data.\n");
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for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++)
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data->temp[i]
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= i2c_smbus_read_byte_data(client,
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lm95241_reg_address[i]);
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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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/* Sysfs stuff */
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static ssize_t show_input(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lm95241_data *data = lm95241_update_device(dev);
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snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->interval / HZ);
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return strlen(buf);
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return snprintf(buf, PAGE_SIZE - 1, "%d\n",
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TempFromReg(data->temp[to_sensor_dev_attr(attr)->index],
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data->temp[to_sensor_dev_attr(attr)->index + 1]));
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}
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static ssize_t show_type(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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return snprintf(buf, PAGE_SIZE - 1,
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data->model & to_sensor_dev_attr(attr)->index ? "1\n" : "2\n");
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}
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static ssize_t set_type(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 i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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unsigned long val;
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int shift;
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u8 mask = to_sensor_dev_attr(attr)->index;
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if (strict_strtoul(buf, 10, &val) < 0)
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return -EINVAL;
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if (val != 1 && val != 2)
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return -EINVAL;
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shift = mask == R1MS_MASK ? TT1_SHIFT : TT2_SHIFT;
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mutex_lock(&data->update_lock);
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data->trutherm &= ~(TT_MASK << shift);
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if (val == 1) {
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data->model |= mask;
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data->trutherm |= (TT_ON << shift);
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} else {
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data->model &= ~mask;
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data->trutherm |= (TT_OFF << shift);
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}
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data->valid = 0;
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL,
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data->model);
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM,
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data->trutherm);
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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 show_min(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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return snprintf(buf, PAGE_SIZE - 1,
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data->config & to_sensor_dev_attr(attr)->index ?
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"-127000\n" : "0\n");
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}
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static ssize_t set_min(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 i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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long val;
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if (strict_strtol(buf, 10, &val) < 0)
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return -EINVAL;
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if (val < -128000)
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return -EINVAL;
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mutex_lock(&data->update_lock);
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if (val < 0)
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data->config |= to_sensor_dev_attr(attr)->index;
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else
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data->config &= ~to_sensor_dev_attr(attr)->index;
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data->valid = 0;
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
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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 show_max(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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return snprintf(buf, PAGE_SIZE - 1,
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data->config & to_sensor_dev_attr(attr)->index ?
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"127000\n" : "255000\n");
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}
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static ssize_t set_max(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 i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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long val;
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if (strict_strtol(buf, 10, &val) < 0)
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return -EINVAL;
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if (val >= 256000)
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return -EINVAL;
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mutex_lock(&data->update_lock);
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if (val <= 127000)
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data->config |= to_sensor_dev_attr(attr)->index;
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else
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data->config &= ~to_sensor_dev_attr(attr)->index;
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data->valid = 0;
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
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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 show_interval(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct lm95241_data *data = lm95241_update_device(dev);
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return snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->interval
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/ HZ);
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}
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static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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const char *buf, size_t count)
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{
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struct i2c_client *client = to_i2c_client(dev);
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struct lm95241_data *data = i2c_get_clientdata(client);
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@ -138,176 +289,34 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
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return count;
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}
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#define show_type(flag) \
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static ssize_t show_type##flag(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm95241_data *data = i2c_get_clientdata(client); \
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\
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snprintf(buf, PAGE_SIZE - 1, \
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data->model & R##flag##MS_MASK ? "1\n" : "2\n"); \
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return strlen(buf); \
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}
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show_type(1);
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show_type(2);
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#define show_min(flag) \
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static ssize_t show_min##flag(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm95241_data *data = i2c_get_clientdata(client); \
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\
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snprintf(buf, PAGE_SIZE - 1, \
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data->config & R##flag##DF_MASK ? \
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"-127000\n" : "0\n"); \
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return strlen(buf); \
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}
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show_min(1);
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show_min(2);
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#define show_max(flag) \
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static ssize_t show_max##flag(struct device *dev, \
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struct device_attribute *attr, char *buf) \
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{ \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm95241_data *data = i2c_get_clientdata(client); \
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\
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snprintf(buf, PAGE_SIZE - 1, \
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data->config & R##flag##DF_MASK ? \
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"127000\n" : "255000\n"); \
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return strlen(buf); \
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}
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show_max(1);
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show_max(2);
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#define set_type(flag) \
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static ssize_t set_type##flag(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 i2c_client *client = to_i2c_client(dev); \
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struct lm95241_data *data = i2c_get_clientdata(client); \
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\
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long val; \
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\
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if (strict_strtol(buf, 10, &val) < 0) \
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return -EINVAL; \
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\
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if ((val == 1) || (val == 2)) { \
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\
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mutex_lock(&data->update_lock); \
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\
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data->trutherm &= ~(TT_MASK << TT##flag##_SHIFT); \
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if (val == 1) { \
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data->model |= R##flag##MS_MASK; \
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data->trutherm |= (TT_ON << TT##flag##_SHIFT); \
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} \
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else { \
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data->model &= ~R##flag##MS_MASK; \
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data->trutherm |= (TT_OFF << TT##flag##_SHIFT); \
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} \
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\
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data->valid = 0; \
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\
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, \
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data->model); \
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, \
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data->trutherm); \
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\
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mutex_unlock(&data->update_lock); \
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\
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} \
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return count; \
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}
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set_type(1);
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set_type(2);
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#define set_min(flag) \
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static ssize_t set_min##flag(struct device *dev, \
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struct device_attribute *devattr, const char *buf, size_t count) \
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{ \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm95241_data *data = i2c_get_clientdata(client); \
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\
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long val; \
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\
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if (strict_strtol(buf, 10, &val) < 0) \
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return -EINVAL;\
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\
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mutex_lock(&data->update_lock); \
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\
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if (val < 0) \
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data->config |= R##flag##DF_MASK; \
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else \
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data->config &= ~R##flag##DF_MASK; \
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\
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data->valid = 0; \
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\
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, \
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data->config); \
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\
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mutex_unlock(&data->update_lock); \
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\
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return count; \
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}
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set_min(1);
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set_min(2);
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#define set_max(flag) \
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static ssize_t set_max##flag(struct device *dev, \
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struct device_attribute *devattr, const char *buf, size_t count) \
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{ \
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struct i2c_client *client = to_i2c_client(dev); \
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struct lm95241_data *data = i2c_get_clientdata(client); \
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\
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long val; \
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\
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if (strict_strtol(buf, 10, &val) < 0) \
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return -EINVAL; \
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\
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mutex_lock(&data->update_lock); \
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\
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if (val <= 127000) \
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data->config |= R##flag##DF_MASK; \
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else \
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data->config &= ~R##flag##DF_MASK; \
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\
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data->valid = 0; \
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\
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i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, \
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data->config); \
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\
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mutex_unlock(&data->update_lock); \
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\
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return count; \
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}
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set_max(1);
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set_max(2);
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static DEVICE_ATTR(temp1_input, S_IRUGO, show_local, NULL);
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static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote1, NULL);
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static DEVICE_ATTR(temp3_input, S_IRUGO, show_remote2, NULL);
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static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type1, set_type1);
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static DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type2, set_type2);
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static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min1, set_min1);
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static DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min2, set_min2);
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static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max1, set_max1);
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static DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max2, set_max2);
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static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0);
|
||||
static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2);
|
||||
static SENSOR_DEVICE_ATTR(temp3_input, S_IRUGO, show_input, NULL, 4);
|
||||
static SENSOR_DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type, set_type,
|
||||
R1MS_MASK);
|
||||
static SENSOR_DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type, set_type,
|
||||
R2MS_MASK);
|
||||
static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min, set_min,
|
||||
R1DF_MASK);
|
||||
static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min, set_min,
|
||||
R2DF_MASK);
|
||||
static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max,
|
||||
R1DF_MASK);
|
||||
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,
|
||||
R2DF_MASK);
|
||||
static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
|
||||
set_interval);
|
||||
|
||||
static struct attribute *lm95241_attributes[] = {
|
||||
&dev_attr_temp1_input.attr,
|
||||
&dev_attr_temp2_input.attr,
|
||||
&dev_attr_temp3_input.attr,
|
||||
&dev_attr_temp2_type.attr,
|
||||
&dev_attr_temp3_type.attr,
|
||||
&dev_attr_temp2_min.attr,
|
||||
&dev_attr_temp3_min.attr,
|
||||
&dev_attr_temp2_max.attr,
|
||||
&dev_attr_temp3_max.attr,
|
||||
&sensor_dev_attr_temp1_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_input.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_type.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_type.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_min.dev_attr.attr,
|
||||
&sensor_dev_attr_temp2_max.dev_attr.attr,
|
||||
&sensor_dev_attr_temp3_max.dev_attr.attr,
|
||||
&dev_attr_update_interval.attr,
|
||||
NULL
|
||||
};
|
||||
@ -329,9 +338,9 @@ static int lm95241_detect(struct i2c_client *new_client,
|
||||
|
||||
if ((i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID)
|
||||
== MANUFACTURER_ID)
|
||||
&& (i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID)
|
||||
>= DEFAULT_REVISION)) {
|
||||
name = "lm95241";
|
||||
&& (i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID)
|
||||
>= DEFAULT_REVISION)) {
|
||||
name = DEVNAME;
|
||||
} else {
|
||||
dev_dbg(&adapter->dev, "LM95241 detection failed at 0x%02x\n",
|
||||
address);
|
||||
@ -343,6 +352,25 @@ static int lm95241_detect(struct i2c_client *new_client,
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void lm95241_init_client(struct i2c_client *client)
|
||||
{
|
||||
struct lm95241_data *data = i2c_get_clientdata(client);
|
||||
|
||||
data->interval = HZ; /* 1 sec default */
|
||||
data->valid = 0;
|
||||
data->config = CFG_CR0076;
|
||||
data->model = 0;
|
||||
data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT);
|
||||
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_REM_FILTER,
|
||||
R1FE_MASK | R2FE_MASK);
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM,
|
||||
data->trutherm);
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL,
|
||||
data->model);
|
||||
}
|
||||
|
||||
static int lm95241_probe(struct i2c_client *new_client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
@ -382,26 +410,6 @@ exit:
|
||||
return err;
|
||||
}
|
||||
|
||||
static void lm95241_init_client(struct i2c_client *client)
|
||||
{
|
||||
struct lm95241_data *data = i2c_get_clientdata(client);
|
||||
|
||||
data->interval = HZ; /* 1 sec default */
|
||||
data->valid = 0;
|
||||
data->config = CFG_CR0076;
|
||||
data->model = 0;
|
||||
data->trutherm = (TT_OFF << TT1_SHIFT) | (TT_OFF << TT2_SHIFT);
|
||||
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG,
|
||||
data->config);
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_REM_FILTER,
|
||||
R1FE_MASK | R2FE_MASK);
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM,
|
||||
data->trutherm);
|
||||
i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL,
|
||||
data->model);
|
||||
}
|
||||
|
||||
static int lm95241_remove(struct i2c_client *client)
|
||||
{
|
||||
struct lm95241_data *data = i2c_get_clientdata(client);
|
||||
@ -413,46 +421,9 @@ static int lm95241_remove(struct i2c_client *client)
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct lm95241_data *lm95241_update_device(struct device *dev)
|
||||
{
|
||||
struct i2c_client *client = to_i2c_client(dev);
|
||||
struct lm95241_data *data = i2c_get_clientdata(client);
|
||||
|
||||
mutex_lock(&data->update_lock);
|
||||
|
||||
if (time_after(jiffies, data->last_updated + data->interval) ||
|
||||
!data->valid) {
|
||||
dev_dbg(&client->dev, "Updating lm95241 data.\n");
|
||||
data->local_h =
|
||||
i2c_smbus_read_byte_data(client,
|
||||
LM95241_REG_R_LOCAL_TEMPH);
|
||||
data->local_l =
|
||||
i2c_smbus_read_byte_data(client,
|
||||
LM95241_REG_R_LOCAL_TEMPL);
|
||||
data->remote1_h =
|
||||
i2c_smbus_read_byte_data(client,
|
||||
LM95241_REG_R_REMOTE1_TEMPH);
|
||||
data->remote1_l =
|
||||
i2c_smbus_read_byte_data(client,
|
||||
LM95241_REG_R_REMOTE1_TEMPL);
|
||||
data->remote2_h =
|
||||
i2c_smbus_read_byte_data(client,
|
||||
LM95241_REG_R_REMOTE2_TEMPH);
|
||||
data->remote2_l =
|
||||
i2c_smbus_read_byte_data(client,
|
||||
LM95241_REG_R_REMOTE2_TEMPL);
|
||||
data->last_updated = jiffies;
|
||||
data->valid = 1;
|
||||
}
|
||||
|
||||
mutex_unlock(&data->update_lock);
|
||||
|
||||
return data;
|
||||
}
|
||||
|
||||
/* Driver data (common to all clients) */
|
||||
static const struct i2c_device_id lm95241_id[] = {
|
||||
{ "lm95241", 0 },
|
||||
{ DEVNAME, 0 },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(i2c, lm95241_id);
|
||||
@ -460,7 +431,7 @@ MODULE_DEVICE_TABLE(i2c, lm95241_id);
|
||||
static struct i2c_driver lm95241_driver = {
|
||||
.class = I2C_CLASS_HWMON,
|
||||
.driver = {
|
||||
.name = "lm95241",
|
||||
.name = DEVNAME,
|
||||
},
|
||||
.probe = lm95241_probe,
|
||||
.remove = lm95241_remove,
|
||||
@ -479,7 +450,7 @@ static void __exit sensors_lm95241_exit(void)
|
||||
i2c_del_driver(&lm95241_driver);
|
||||
}
|
||||
|
||||
MODULE_AUTHOR("Davide Rizzo <elpa-rizzo@gmail.com>");
|
||||
MODULE_AUTHOR("Davide Rizzo <elpa.rizzo@gmail.com>");
|
||||
MODULE_DESCRIPTION("LM95241 sensor driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user