Misc cleanups to the lm85 hardware monitoring driver:
* Mark constant arrays as const.
* Remove useless masks.
* Have lm85_write_value return void - nobody is checking the returned
value anyway and in some cases it was plain wrong.
* Remove useless initializations.
* Rename new_client to client in lm85_detect.
* Replace cascaded if/else with a switch/case in lm85_detect.
* Group similar loops in lm85_update_device.
* Remove legacy comments.
Signed-off-by: Jean Delvare <khali at linux-fr.org>
---
drivers/hwmon/lm85.c | 151 ++++++++++++++++++++++----------------------------
1 file changed, 67 insertions(+), 84 deletions(-)
--- linux-2.6.25-rc8.orig/drivers/hwmon/lm85.c 2008-04-03 14:18:50.000000000 +0200
+++ linux-2.6.25-rc8/drivers/hwmon/lm85.c 2008-04-03 15:27:45.000000000 +0200
@@ -110,7 +110,7 @@ I2C_CLIENT_INSMOD_6(lm85b, lm85c, adm102
*/
/* IN are scaled acording to built-in resistors */
-static int lm85_scaling[] = { /* .001 Volts */
+static const int lm85_scaling[] = { /* .001 Volts */
2500, 2250, 3300, 5000, 12000,
3300, 1500, 1800 /*EMC6D100*/
};
@@ -164,7 +164,7 @@ static inline u16 FAN_TO_REG(unsigned lo
*/
/* These are the zone temperature range encodings in .001 degree C */
-static int lm85_range_map[] = {
+static const int lm85_range_map[] = {
2000, 2500, 3300, 4000, 5000, 6600,
8000, 10000, 13300, 16000, 20000, 26600,
32000, 40000, 53300, 80000
@@ -191,13 +191,8 @@ static int RANGE_TO_REG(int range)
}
#define RANGE_FROM_REG(val) lm85_range_map[(val) & 0x0f]
-/* These are the Acoustic Enhancement, or Temperature smoothing encodings
- * NOTE: The enable/disable bit is INCLUDED in these encodings as the
- * MSB (bit 3, value 8). If the enable bit is 0, the encoded value
- * is ignored, or set to 0.
- */
/* These are the PWM frequency encodings */
-static int lm85_freq_map[] = { /* .1 Hz */
+static const int lm85_freq_map[] = { /* .1 Hz */
100, 150, 230, 300, 380, 470, 620, 940
};
@@ -210,7 +205,7 @@ static int FREQ_TO_REG(int freq)
for (i = 0; i < 7; ++i)
if (freq <= lm85_freq_map[i])
break;
- return i & 0x07;
+ return i;
}
#define FREQ_FROM_REG(val) lm85_freq_map[(val) & 0x07]
@@ -226,8 +221,8 @@ static int FREQ_TO_REG(int freq)
* -2 -- PWM responds to manual control
*/
-static int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
-#define ZONE_FROM_REG(val) lm85_zone_map[((val) >> 5) & 0x07]
+static const int lm85_zone_map[] = { 1, 2, 3, -1, 0, 23, 123, -2 };
+#define ZONE_FROM_REG(val) lm85_zone_map[(val) >> 5]
static int ZONE_TO_REG(int zone)
{
@@ -238,7 +233,7 @@ static int ZONE_TO_REG(int zone)
break;
if (i > 7) /* Not found. */
i = 3; /* Always 100% */
- return (i & 0x07) << 5;
+ return i << 5;
}
#define HYST_TO_REG(val) SENSORS_LIMIT(((val) + 500) / 1000, 0, 15)
@@ -322,7 +317,7 @@ static int lm85_detect(struct i2c_adapte
static int lm85_detach_client(struct i2c_client *client);
static int lm85_read_value(struct i2c_client *client, u8 reg);
-static int lm85_write_value(struct i2c_client *client, u8 reg, int value);
+static void lm85_write_value(struct i2c_client *client, u8 reg, int value);
static struct lm85_data *lm85_update_device(struct device *dev);
static void lm85_init_client(struct i2c_client *client);
@@ -1096,13 +1091,12 @@ static int lm85_detect(struct i2c_adapte
int kind)
{
int company, verstep;
- struct i2c_client *new_client = NULL;
+ struct i2c_client *client;
struct lm85_data *data;
int err = 0;
- const char *type_name = "";
+ const char *type_name;
- if (!i2c_check_functionality(adapter,
- I2C_FUNC_SMBUS_BYTE_DATA)) {
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
/* We need to be able to do byte I/O */
goto ERROR0;
}
@@ -1116,21 +1110,20 @@ static int lm85_detect(struct i2c_adapte
goto ERROR0;
}
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm85_driver;
- new_client->flags = 0;
+ client = &data->client;
+ i2c_set_clientdata(client, data);
+ client->addr = address;
+ client->adapter = adapter;
+ client->driver = &lm85_driver;
/* Now, we do the remaining detection. */
- company = lm85_read_value(new_client, LM85_REG_COMPANY);
- verstep = lm85_read_value(new_client, LM85_REG_VERSTEP);
+ company = lm85_read_value(client, LM85_REG_COMPANY);
+ verstep = lm85_read_value(client, LM85_REG_VERSTEP);
dev_dbg(&adapter->dev, "Detecting device at %d,0x%02x with"
" COMPANY: 0x%02x and VERSTEP: 0x%02x\n",
- i2c_adapter_id(new_client->adapter), new_client->addr,
+ i2c_adapter_id(client->adapter), client->addr,
company, verstep);
/* If auto-detecting, Determine the chip type. */
@@ -1197,56 +1190,65 @@ static int lm85_detect(struct i2c_adapte
}
/* Fill in the chip specific driver values */
- if (kind == any_chip)
- type_name = "lm85";
- else if (kind == lm85b)
+ switch (kind) {
+ case lm85b:
type_name = "lm85b";
- else if (kind == lm85c)
+ break;
+ case lm85c:
type_name = "lm85c";
- else if (kind == adm1027)
+ break;
+ case adm1027:
type_name = "adm1027";
- else if (kind == adt7463)
+ break;
+ case adt7463:
type_name = "adt7463";
- else if (kind == emc6d100)
+ break;
+ case emc6d100:
type_name = "emc6d100";
- else if (kind == emc6d102)
+ break;
+ case emc6d102:
type_name = "emc6d102";
- strlcpy(new_client->name, type_name, I2C_NAME_SIZE);
+ break;
+ default:
+ type_name = "lm85";
+ }
+ strlcpy(client->name, type_name, I2C_NAME_SIZE);
/* Fill in the remaining client fields */
data->type = kind;
- data->valid = 0;
mutex_init(&data->update_lock);
/* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(new_client)))
+ err = i2c_attach_client(client);
+ if (err)
goto ERROR1;
/* Set the VRM version */
data->vrm = vid_which_vrm();
/* Initialize the LM85 chip */
- lm85_init_client(new_client);
+ lm85_init_client(client);
/* Register sysfs hooks */
- if ((err = sysfs_create_group(&new_client->dev.kobj, &lm85_group)))
+ err = sysfs_create_group(&client->dev.kobj, &lm85_group);
+ if (err)
goto ERROR2;
/* The ADT7463 has an optional VRM 10 mode where pin 21 is used
as a sixth digital VID input rather than an analog input. */
- data->vid = lm85_read_value(new_client, LM85_REG_VID);
+ data->vid = lm85_read_value(client, LM85_REG_VID);
if (!(kind == adt7463 && (data->vid & 0x80)))
- if ((err = sysfs_create_group(&new_client->dev.kobj,
+ if ((err = sysfs_create_group(&client->dev.kobj,
&lm85_group_in4)))
goto ERROR3;
/* The EMC6D100 has 3 additional voltage inputs */
if (kind == emc6d100)
- if ((err = sysfs_create_group(&new_client->dev.kobj,
+ if ((err = sysfs_create_group(&client->dev.kobj,
&lm85_group_in567)))
goto ERROR3;
- data->hwmon_dev = hwmon_device_register(&new_client->dev);
+ data->hwmon_dev = hwmon_device_register(&client->dev);
if (IS_ERR(data->hwmon_dev)) {
err = PTR_ERR(data->hwmon_dev);
goto ERROR3;
@@ -1256,12 +1258,12 @@ static int lm85_detect(struct i2c_adapte
/* Error out and cleanup code */
ERROR3:
- sysfs_remove_group(&new_client->dev.kobj, &lm85_group);
- sysfs_remove_group(&new_client->dev.kobj, &lm85_group_in4);
+ sysfs_remove_group(&client->dev.kobj, &lm85_group);
+ sysfs_remove_group(&client->dev.kobj, &lm85_group_in4);
if (kind == emc6d100)
- sysfs_remove_group(&new_client->dev.kobj, &lm85_group_in567);
+ sysfs_remove_group(&client->dev.kobj, &lm85_group_in567);
ERROR2:
- i2c_detach_client(new_client);
+ i2c_detach_client(client);
ERROR1:
kfree(data);
ERROR0:
@@ -1308,10 +1310,8 @@ static int lm85_read_value(struct i2c_cl
return res;
}
-static int lm85_write_value(struct i2c_client *client, u8 reg, int value)
+static void lm85_write_value(struct i2c_client *client, u8 reg, int value)
{
- int res;
-
switch (reg) {
case LM85_REG_FAN(0): /* Write WORD data */
case LM85_REG_FAN(1):
@@ -1322,16 +1322,13 @@ static int lm85_write_value(struct i2c_c
case LM85_REG_FAN_MIN(2):
case LM85_REG_FAN_MIN(3):
/* NOTE: ALARM is read only, so not included here */
- res = i2c_smbus_write_byte_data(client, reg, value & 0xff);
- res |= i2c_smbus_write_byte_data(client, reg + 1,
- (value >> 8) & 0xff);
+ i2c_smbus_write_byte_data(client, reg, value & 0xff);
+ i2c_smbus_write_byte_data(client, reg + 1, value >> 8);
break;
default: /* Write BYTE data */
- res = i2c_smbus_write_byte_data(client, reg, value);
+ i2c_smbus_write_byte_data(client, reg, value);
break;
}
-
- return res;
}
static void lm85_init_client(struct i2c_client *client)
@@ -1413,6 +1410,8 @@ static struct lm85_data *lm85_update_dev
for (i = 0; i <= 3; ++i) {
data->in[i] =
lm85_read_value(client, LM85_REG_IN(i));
+ data->fan[i] =
+ lm85_read_value(client, LM85_REG_FAN(i));
}
if (!(data->type == adt7463 && (data->vid & 0x80))) {
@@ -1420,17 +1419,9 @@ static struct lm85_data *lm85_update_dev
LM85_REG_IN(4));
}
- for (i = 0; i <= 3; ++i) {
- data->fan[i] =
- lm85_read_value(client, LM85_REG_FAN(i));
- }
-
for (i = 0; i <= 2; ++i) {
data->temp[i] =
lm85_read_value(client, LM85_REG_TEMP(i));
- }
-
- for (i = 0; i <= 2; ++i) {
data->pwm[i] =
lm85_read_value(client, LM85_REG_PWM(i));
}
@@ -1461,13 +1452,13 @@ static struct lm85_data *lm85_update_dev
EMC6D102_REG_EXTEND_ADC4);
data->in_ext[0] = ext3 & 0x0f;
data->in_ext[1] = ext4 & 0x0f;
- data->in_ext[2] = (ext4 >> 4) & 0x0f;
- data->in_ext[3] = (ext3 >> 4) & 0x0f;
- data->in_ext[4] = (ext2 >> 4) & 0x0f;
+ data->in_ext[2] = ext4 >> 4;
+ data->in_ext[3] = ext3 >> 4;
+ data->in_ext[4] = ext2 >> 4;
data->temp_ext[0] = ext1 & 0x0f;
data->temp_ext[1] = ext2 & 0x0f;
- data->temp_ext[2] = (ext1 >> 4) & 0x0f;
+ data->temp_ext[2] = ext1 >> 4;
}
data->last_reading = jiffies;
@@ -1483,6 +1474,8 @@ static struct lm85_data *lm85_update_dev
lm85_read_value(client, LM85_REG_IN_MIN(i));
data->in_max[i] =
lm85_read_value(client, LM85_REG_IN_MAX(i));
+ data->fan_min[i] =
+ lm85_read_value(client, LM85_REG_FAN_MIN(i));
}
if (!(data->type == adt7463 && (data->vid & 0x80))) {
@@ -1501,25 +1494,19 @@ static struct lm85_data *lm85_update_dev
}
}
- for (i = 0; i <= 3; ++i) {
- data->fan_min[i] =
- lm85_read_value(client, LM85_REG_FAN_MIN(i));
- }
-
for (i = 0; i <= 2; ++i) {
+ int val;
+
data->temp_min[i] =
lm85_read_value(client, LM85_REG_TEMP_MIN(i));
data->temp_max[i] =
lm85_read_value(client, LM85_REG_TEMP_MAX(i));
- }
- for (i = 0; i <= 2; ++i) {
- int val;
data->autofan[i].config =
lm85_read_value(client, LM85_REG_AFAN_CONFIG(i));
val = lm85_read_value(client, LM85_REG_AFAN_RANGE(i));
data->autofan[i].freq = val & 0x07;
- data->zone[i].range = (val >> 4) & 0x0f;
+ data->zone[i].range = val >> 4;
data->autofan[i].min_pwm =
lm85_read_value(client, LM85_REG_AFAN_MINPWM(i));
data->zone[i].limit =
@@ -1534,11 +1521,11 @@ static struct lm85_data *lm85_update_dev
data->autofan[2].min_off = (i & 0x80) != 0;
i = lm85_read_value(client, LM85_REG_AFAN_HYST1);
- data->zone[0].hyst = (i>>4) & 0x0f;
+ data->zone[0].hyst = i >> 4;
data->zone[1].hyst = i & 0x0f;
i = lm85_read_value(client, LM85_REG_AFAN_HYST2);
- data->zone[2].hyst = (i>>4) & 0x0f;
+ data->zone[2].hyst = i >> 4;
data->last_config = jiffies;
} /* last_config */
@@ -1561,14 +1548,10 @@ static void __exit sm_lm85_exit(void)
i2c_del_driver(&lm85_driver);
}
-/* Thanks to Richard Barrington for adding the LM85 to sensors-detect.
- * Thanks to Margit Schubert-While <margitsw at t-online.de> for help with
- * post 2.7.0 CVS changes.
- */
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Philip Pokorny <ppokorny at penguincomputing.com>, "
"Margit Schubert-While <margitsw at t-online.de>, "
- "Justin Thiessen <jthiessen at penguincomputing.com");
+ "Justin Thiessen <jthiessen at penguincomputing.com>");
MODULE_DESCRIPTION("LM85-B, LM85-C driver");
module_init(sm_lm85_init);
--
Jean Delvare
