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hwmon: (lm95241) Rewrite to avoid using macros

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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 2010-11-18 07:23:00 -08:00 committed by Guenter Roeck
parent 2bfe814826
commit 0f1deb4b82
1 changed files with 239 additions and 268 deletions
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507
drivers/hwmon/lm95241.c
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@ -1,13 +1,9 @@
/* /*
* lm95241.c - Part of lm_sensors, Linux kernel modules for hardware * Copyright (C) 2008, 2010 Davide Rizzo <elpa.rizzo@gmail.com>
* monitoring
* Copyright (C) 2008 Davide Rizzo <elpa-rizzo@gmail.com>
* *
* Based on the max1619 driver. The LM95241 is a sensor chip made by National * The LM95241 is a sensor chip made by National Semiconductors.
* Semiconductors. * It reports up to three temperatures (its own plus up to two external ones).
* It reports up to three temperatures (its own plus up to * Complete datasheet can be obtained from National's website at:
* two external ones). Complete datasheet can be
* obtained from National's website at:
* http://www.national.com/ds.cgi/LM/LM95241.pdf * http://www.national.com/ds.cgi/LM/LM95241.pdf
* *
* This program is free software; you can redistribute it and/or modify * This program is free software; you can redistribute it and/or modify
@ -36,8 +32,10 @@
#include <linux/mutex.h> #include <linux/mutex.h>
#include <linux/sysfs.h> #include <linux/sysfs.h>
#define DEVNAME "lm95241"
static const unsigned short normal_i2c[] = { static const unsigned short normal_i2c[] = {
0x19, 0x2a, 0x2b, I2C_CLIENT_END}; 0x19, 0x2a, 0x2b, I2C_CLIENT_END };
/* LM95241 registers */ /* LM95241 registers */
#define LM95241_REG_R_MAN_ID 0xFE #define LM95241_REG_R_MAN_ID 0xFE
@ -46,7 +44,7 @@ static const unsigned short normal_i2c[] = {
#define LM95241_REG_RW_CONFIG 0x03 #define LM95241_REG_RW_CONFIG 0x03
#define LM95241_REG_RW_REM_FILTER 0x06 #define LM95241_REG_RW_REM_FILTER 0x06
#define LM95241_REG_RW_TRUTHERM 0x07 #define LM95241_REG_RW_TRUTHERM 0x07
#define LM95241_REG_W_ONE_SHOT 0x0F #define LM95241_REG_W_ONE_SHOT 0x0F
#define LM95241_REG_R_LOCAL_TEMPH 0x10 #define LM95241_REG_R_LOCAL_TEMPH 0x10
#define LM95241_REG_R_REMOTE1_TEMPH 0x11 #define LM95241_REG_R_REMOTE1_TEMPH 0x11
#define LM95241_REG_R_REMOTE2_TEMPH 0x12 #define LM95241_REG_R_REMOTE2_TEMPH 0x12
@ -79,52 +77,205 @@ static const unsigned short normal_i2c[] = {
#define MANUFACTURER_ID 0x01 #define MANUFACTURER_ID 0x01
#define DEFAULT_REVISION 0xA4 #define DEFAULT_REVISION 0xA4
/* Conversions and various macros */ static const u8 lm95241_reg_address[] = {
#define TEMP_FROM_REG(val_h, val_l) (((val_h) & 0x80 ? (val_h) - 0x100 : \ LM95241_REG_R_LOCAL_TEMPH,
(val_h)) * 1000 + (val_l) * 1000 / 256) LM95241_REG_R_LOCAL_TEMPL,
LM95241_REG_R_REMOTE1_TEMPH,
/* Functions declaration */ LM95241_REG_R_REMOTE1_TEMPL,
static void lm95241_init_client(struct i2c_client *client); LM95241_REG_R_REMOTE2_TEMPH,
static struct lm95241_data *lm95241_update_device(struct device *dev); LM95241_REG_R_REMOTE2_TEMPL
};
/* Client data (each client gets its own) */ /* Client data (each client gets its own) */
struct lm95241_data { struct lm95241_data {
struct device *hwmon_dev; struct device *hwmon_dev;
struct mutex update_lock; struct mutex update_lock;
unsigned long last_updated, interval; /* in jiffies */ unsigned long last_updated, interval; /* in jiffies */
char valid; /* zero until following fields are valid */ char valid; /* zero until following fields are valid */
/* registers values */ /* registers values */
u8 local_h, local_l; /* local */ u8 temp[ARRAY_SIZE(lm95241_reg_address)];
u8 remote1_h, remote1_l; /* remote1 */
u8 remote2_h, remote2_l; /* remote2 */
u8 config, model, trutherm; u8 config, model, trutherm;
}; };
/* Sysfs stuff */ /* Conversions */
#define show_temp(value) \ static int TempFromReg(u8 val_h, u8 val_l)
static ssize_t show_##value(struct device *dev, \ {
struct device_attribute *attr, char *buf) \ if (val_h & 0x80)
{ \ return val_h - 0x100;
struct lm95241_data *data = lm95241_update_device(dev); \ return val_h * 1000 + val_l * 1000 / 256;
snprintf(buf, PAGE_SIZE - 1, "%d\n", \
TEMP_FROM_REG(data->value##_h, data->value##_l)); \
return strlen(buf); \
} }
show_temp(local);
show_temp(remote1);
show_temp(remote2);
static ssize_t show_interval(struct device *dev, struct device_attribute *attr, static struct lm95241_data *lm95241_update_device(struct device *dev)
char *buf) {
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) {
int i;
dev_dbg(&client->dev, "Updating lm95241 data.\n");
for (i = 0; i < ARRAY_SIZE(lm95241_reg_address); i++)
data->temp[i]
= i2c_smbus_read_byte_data(client,
lm95241_reg_address[i]);
data->last_updated = jiffies;
data->valid = 1;
}
mutex_unlock(&data->update_lock);
return data;
}
/* Sysfs stuff */
static ssize_t show_input(struct device *dev, struct device_attribute *attr,
char *buf)
{ {
struct lm95241_data *data = lm95241_update_device(dev); struct lm95241_data *data = lm95241_update_device(dev);
snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->interval / HZ); return snprintf(buf, PAGE_SIZE - 1, "%d\n",
return strlen(buf); TempFromReg(data->temp[to_sensor_dev_attr(attr)->index],
data->temp[to_sensor_dev_attr(attr)->index + 1]));
}
static ssize_t show_type(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
return snprintf(buf, PAGE_SIZE - 1,
data->model & to_sensor_dev_attr(attr)->index ? "1\n" : "2\n");
}
static ssize_t set_type(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
unsigned long val;
int shift;
u8 mask = to_sensor_dev_attr(attr)->index;
if (strict_strtoul(buf, 10, &val) < 0)
return -EINVAL;
if (val != 1 && val != 2)
return -EINVAL;
shift = mask == R1MS_MASK ? TT1_SHIFT : TT2_SHIFT;
mutex_lock(&data->update_lock);
data->trutherm &= ~(TT_MASK << shift);
if (val == 1) {
data->model |= mask;
data->trutherm |= (TT_ON << shift);
} else {
data->model &= ~mask;
data->trutherm |= (TT_OFF << shift);
}
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL,
data->model);
i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM,
data->trutherm);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_min(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
return snprintf(buf, PAGE_SIZE - 1,
data->config & to_sensor_dev_attr(attr)->index ?
"-127000\n" : "0\n");
}
static ssize_t set_min(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
long val;
if (strict_strtol(buf, 10, &val) < 0)
return -EINVAL;
if (val < -128000)
return -EINVAL;
mutex_lock(&data->update_lock);
if (val < 0)
data->config |= to_sensor_dev_attr(attr)->index;
else
data->config &= ~to_sensor_dev_attr(attr)->index;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_max(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
return snprintf(buf, PAGE_SIZE - 1,
data->config & to_sensor_dev_attr(attr)->index ?
"127000\n" : "255000\n");
}
static ssize_t set_max(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client);
long val;
if (strict_strtol(buf, 10, &val) < 0)
return -EINVAL;
if (val >= 256000)
return -EINVAL;
mutex_lock(&data->update_lock);
if (val <= 127000)
data->config |= to_sensor_dev_attr(attr)->index;
else
data->config &= ~to_sensor_dev_attr(attr)->index;
data->valid = 0;
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, data->config);
mutex_unlock(&data->update_lock);
return count;
}
static ssize_t show_interval(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct lm95241_data *data = lm95241_update_device(dev);
return snprintf(buf, PAGE_SIZE - 1, "%lu\n", 1000 * data->interval
/ HZ);
} }
static ssize_t set_interval(struct device *dev, struct device_attribute *attr, static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count) const char *buf, size_t count)
{ {
struct i2c_client *client = to_i2c_client(dev); struct i2c_client *client = to_i2c_client(dev);
struct lm95241_data *data = i2c_get_clientdata(client); struct lm95241_data *data = i2c_get_clientdata(client);
@ -138,176 +289,34 @@ static ssize_t set_interval(struct device *dev, struct device_attribute *attr,
return count; return count;
} }
#define show_type(flag) \ static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, show_input, NULL, 0);
static ssize_t show_type##flag(struct device *dev, \ static SENSOR_DEVICE_ATTR(temp2_input, S_IRUGO, show_input, NULL, 2);
struct device_attribute *attr, char *buf) \ 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,
struct i2c_client *client = to_i2c_client(dev); \ R1MS_MASK);
struct lm95241_data *data = i2c_get_clientdata(client); \ static SENSOR_DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type, set_type,
\ R2MS_MASK);
snprintf(buf, PAGE_SIZE - 1, \ static SENSOR_DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min, set_min,
data->model & R##flag##MS_MASK ? "1\n" : "2\n"); \ R1DF_MASK);
return strlen(buf); \ static SENSOR_DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min, set_min,
} R2DF_MASK);
show_type(1); static SENSOR_DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max, set_max,
show_type(2); R1DF_MASK);
static SENSOR_DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max, set_max,
#define show_min(flag) \ R2DF_MASK);
static ssize_t show_min##flag(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm95241_data *data = i2c_get_clientdata(client); \
\
snprintf(buf, PAGE_SIZE - 1, \
data->config & R##flag##DF_MASK ? \
"-127000\n" : "0\n"); \
return strlen(buf); \
}
show_min(1);
show_min(2);
#define show_max(flag) \
static ssize_t show_max##flag(struct device *dev, \
struct device_attribute *attr, char *buf) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm95241_data *data = i2c_get_clientdata(client); \
\
snprintf(buf, PAGE_SIZE - 1, \
data->config & R##flag##DF_MASK ? \
"127000\n" : "255000\n"); \
return strlen(buf); \
}
show_max(1);
show_max(2);
#define set_type(flag) \
static ssize_t set_type##flag(struct device *dev, \
struct device_attribute *attr, \
const char *buf, size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm95241_data *data = i2c_get_clientdata(client); \
\
long val; \
\
if (strict_strtol(buf, 10, &val) < 0) \
return -EINVAL; \
\
if ((val == 1) || (val == 2)) { \
\
mutex_lock(&data->update_lock); \
\
data->trutherm &= ~(TT_MASK << TT##flag##_SHIFT); \
if (val == 1) { \
data->model |= R##flag##MS_MASK; \
data->trutherm |= (TT_ON << TT##flag##_SHIFT); \
} \
else { \
data->model &= ~R##flag##MS_MASK; \
data->trutherm |= (TT_OFF << TT##flag##_SHIFT); \
} \
\
data->valid = 0; \
\
i2c_smbus_write_byte_data(client, LM95241_REG_RW_REMOTE_MODEL, \
data->model); \
i2c_smbus_write_byte_data(client, LM95241_REG_RW_TRUTHERM, \
data->trutherm); \
\
mutex_unlock(&data->update_lock); \
\
} \
return count; \
}
set_type(1);
set_type(2);
#define set_min(flag) \
static ssize_t set_min##flag(struct device *dev, \
struct device_attribute *devattr, const char *buf, size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm95241_data *data = i2c_get_clientdata(client); \
\
long val; \
\
if (strict_strtol(buf, 10, &val) < 0) \
return -EINVAL;\
\
mutex_lock(&data->update_lock); \
\
if (val < 0) \
data->config |= R##flag##DF_MASK; \
else \
data->config &= ~R##flag##DF_MASK; \
\
data->valid = 0; \
\
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, \
data->config); \
\
mutex_unlock(&data->update_lock); \
\
return count; \
}
set_min(1);
set_min(2);
#define set_max(flag) \
static ssize_t set_max##flag(struct device *dev, \
struct device_attribute *devattr, const char *buf, size_t count) \
{ \
struct i2c_client *client = to_i2c_client(dev); \
struct lm95241_data *data = i2c_get_clientdata(client); \
\
long val; \
\
if (strict_strtol(buf, 10, &val) < 0) \
return -EINVAL; \
\
mutex_lock(&data->update_lock); \
\
if (val <= 127000) \
data->config |= R##flag##DF_MASK; \
else \
data->config &= ~R##flag##DF_MASK; \
\
data->valid = 0; \
\
i2c_smbus_write_byte_data(client, LM95241_REG_RW_CONFIG, \
data->config); \
\
mutex_unlock(&data->update_lock); \
\
return count; \
}
set_max(1);
set_max(2);
static DEVICE_ATTR(temp1_input, S_IRUGO, show_local, NULL);
static DEVICE_ATTR(temp2_input, S_IRUGO, show_remote1, NULL);
static DEVICE_ATTR(temp3_input, S_IRUGO, show_remote2, NULL);
static DEVICE_ATTR(temp2_type, S_IWUSR | S_IRUGO, show_type1, set_type1);
static DEVICE_ATTR(temp3_type, S_IWUSR | S_IRUGO, show_type2, set_type2);
static DEVICE_ATTR(temp2_min, S_IWUSR | S_IRUGO, show_min1, set_min1);
static DEVICE_ATTR(temp3_min, S_IWUSR | S_IRUGO, show_min2, set_min2);
static DEVICE_ATTR(temp2_max, S_IWUSR | S_IRUGO, show_max1, set_max1);
static DEVICE_ATTR(temp3_max, S_IWUSR | S_IRUGO, show_max2, set_max2);
static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval, static DEVICE_ATTR(update_interval, S_IWUSR | S_IRUGO, show_interval,
set_interval); set_interval);
static struct attribute *lm95241_attributes[] = { static struct attribute *lm95241_attributes[] = {
&dev_attr_temp1_input.attr, &sensor_dev_attr_temp1_input.dev_attr.attr,
&dev_attr_temp2_input.attr, &sensor_dev_attr_temp2_input.dev_attr.attr,
&dev_attr_temp3_input.attr, &sensor_dev_attr_temp3_input.dev_attr.attr,
&dev_attr_temp2_type.attr, &sensor_dev_attr_temp2_type.dev_attr.attr,
&dev_attr_temp3_type.attr, &sensor_dev_attr_temp3_type.dev_attr.attr,
&dev_attr_temp2_min.attr, &sensor_dev_attr_temp2_min.dev_attr.attr,
&dev_attr_temp3_min.attr, &sensor_dev_attr_temp3_min.dev_attr.attr,
&dev_attr_temp2_max.attr, &sensor_dev_attr_temp2_max.dev_attr.attr,
&dev_attr_temp3_max.attr, &sensor_dev_attr_temp3_max.dev_attr.attr,
&dev_attr_update_interval.attr, &dev_attr_update_interval.attr,
NULL 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) if ((i2c_smbus_read_byte_data(new_client, LM95241_REG_R_MAN_ID)
== MANUFACTURER_ID) == MANUFACTURER_ID)
&& (i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID) && (i2c_smbus_read_byte_data(new_client, LM95241_REG_R_CHIP_ID)
>= DEFAULT_REVISION)) { >= DEFAULT_REVISION)) {
name = "lm95241"; name = DEVNAME;
} else { } else {
dev_dbg(&adapter->dev, "LM95241 detection failed at 0x%02x\n", dev_dbg(&adapter->dev, "LM95241 detection failed at 0x%02x\n",
address); address);
@ -343,6 +352,25 @@ static int lm95241_detect(struct i2c_client *new_client,
return 0; 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, static int lm95241_probe(struct i2c_client *new_client,
const struct i2c_device_id *id) const struct i2c_device_id *id)
{ {
@ -382,26 +410,6 @@ exit:
return err; 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) static int lm95241_remove(struct i2c_client *client)
{ {
struct lm95241_data *data = i2c_get_clientdata(client); struct lm95241_data *data = i2c_get_clientdata(client);
@ -413,46 +421,9 @@ static int lm95241_remove(struct i2c_client *client)
return 0; 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) */ /* Driver data (common to all clients) */
static const struct i2c_device_id lm95241_id[] = { static const struct i2c_device_id lm95241_id[] = {
{ "lm95241", 0 }, { DEVNAME, 0 },
{ } { }
}; };
MODULE_DEVICE_TABLE(i2c, lm95241_id); MODULE_DEVICE_TABLE(i2c, lm95241_id);
@ -460,7 +431,7 @@ MODULE_DEVICE_TABLE(i2c, lm95241_id);
static struct i2c_driver lm95241_driver = { static struct i2c_driver lm95241_driver = {
.class = I2C_CLASS_HWMON, .class = I2C_CLASS_HWMON,
.driver = { .driver = {
.name = "lm95241", .name = DEVNAME,
}, },
.probe = lm95241_probe, .probe = lm95241_probe,
.remove = lm95241_remove, .remove = lm95241_remove,
@ -479,7 +450,7 @@ static void __exit sensors_lm95241_exit(void)
i2c_del_driver(&lm95241_driver); 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_DESCRIPTION("LM95241 sensor driver");
MODULE_LICENSE("GPL"); MODULE_LICENSE("GPL");