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hwmon: (adm1031) Various cleanups
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* Rename new_client to client
* Drop redundant initializations to 0
* Drop trailing space
* Other whitespace cleanups
* Split/fold a few long lines
* Constify static data
* Optimizations in set_fan_div()

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
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Jean Delvare authored and Mark M. Hoffman committed Feb 8, 2008
1 parent 38a1f0e commit 6d6006b
Showing 1 changed file with 62 additions and 64 deletions.
126 changes: 62 additions & 64 deletions drivers/hwmon/adm1031.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@
Supports adm1030 / adm1031
Copyright (C) 2004 Alexandre d'Alton <alex@alexdalton.org>
Reworked by Jean Delvare <khali@linux-fr.org>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
Expand All @@ -32,22 +32,22 @@

/* Following macros takes channel parameter starting from 0 to 2 */
#define ADM1031_REG_FAN_SPEED(nr) (0x08 + (nr))
#define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
#define ADM1031_REG_FAN_DIV(nr) (0x20 + (nr))
#define ADM1031_REG_PWM (0x22)
#define ADM1031_REG_FAN_MIN(nr) (0x10 + (nr))

#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4*(nr))
#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4*(nr))
#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4*(nr))
#define ADM1031_REG_TEMP_MAX(nr) (0x14 + 4 * (nr))
#define ADM1031_REG_TEMP_MIN(nr) (0x15 + 4 * (nr))
#define ADM1031_REG_TEMP_CRIT(nr) (0x16 + 4 * (nr))

#define ADM1031_REG_TEMP(nr) (0xa + (nr))
#define ADM1031_REG_TEMP(nr) (0x0a + (nr))
#define ADM1031_REG_AUTO_TEMP(nr) (0x24 + (nr))

#define ADM1031_REG_STATUS(nr) (0x2 + (nr))

#define ADM1031_REG_CONF1 0x0
#define ADM1031_REG_CONF2 0x1
#define ADM1031_REG_EXT_TEMP 0x6
#define ADM1031_REG_CONF1 0x00
#define ADM1031_REG_CONF2 0x01
#define ADM1031_REG_EXT_TEMP 0x06

#define ADM1031_CONF1_MONITOR_ENABLE 0x01 /* Monitoring enable */
#define ADM1031_CONF1_PWM_INVERT 0x08 /* PWM Invert */
Expand Down Expand Up @@ -78,7 +78,7 @@ struct adm1031_data {
/* The chan_select_table contains the possible configurations for
* auto fan control.
*/
auto_chan_table_t *chan_select_table;
const auto_chan_table_t *chan_select_table;
u16 alarm;
u8 conf1;
u8 conf2;
Expand Down Expand Up @@ -181,25 +181,25 @@ static int AUTO_TEMP_MAX_TO_REG(int val, int reg, int pwm)
#define GET_FAN_AUTO_BITFIELD(data, idx) \
(*(data)->chan_select_table)[FAN_CHAN_FROM_REG((data)->conf1)][idx%2]

/* The tables below contains the possible values for the auto fan
/* The tables below contains the possible values for the auto fan
* control bitfields. the index in the table is the register value.
* MSb is the auto fan control enable bit, so the four first entries
* in the table disables auto fan control when both bitfields are zero.
*/
static auto_chan_table_t auto_channel_select_table_adm1031 = {
{0, 0}, {0, 0}, {0, 0}, {0, 0},
{2 /*0b010 */ , 4 /*0b100 */ },
{2 /*0b010 */ , 2 /*0b010 */ },
{4 /*0b100 */ , 4 /*0b100 */ },
{7 /*0b111 */ , 7 /*0b111 */ },
static const auto_chan_table_t auto_channel_select_table_adm1031 = {
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 2 /* 0b010 */ , 4 /* 0b100 */ },
{ 2 /* 0b010 */ , 2 /* 0b010 */ },
{ 4 /* 0b100 */ , 4 /* 0b100 */ },
{ 7 /* 0b111 */ , 7 /* 0b111 */ },
};

static auto_chan_table_t auto_channel_select_table_adm1030 = {
{0, 0}, {0, 0}, {0, 0}, {0, 0},
{2 /*0b10 */ , 0},
{0xff /*invalid */ , 0},
{0xff /*invalid */ , 0},
{3 /*0b11 */ , 0},
static const auto_chan_table_t auto_channel_select_table_adm1030 = {
{ 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
{ 2 /* 0b10 */ , 0 },
{ 0xff /* invalid */ , 0 },
{ 0xff /* invalid */ , 0 },
{ 3 /* 0b11 */ , 0 },
};

/* That function checks if a bitfield is valid and returns the other bitfield
Expand Down Expand Up @@ -228,8 +228,8 @@ get_fan_auto_nearest(struct adm1031_data *data,
break;
} else if (val == (*data->chan_select_table)[i][chan] &&
first_match == -1) {
/* Save the first match in case of an exact match has not been
* found
/* Save the first match in case of an exact match has
* not been found
*/
first_match = i;
}
Expand Down Expand Up @@ -264,16 +264,17 @@ set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
old_fan_mode = data->conf1;

mutex_lock(&data->update_lock);

if ((ret = get_fan_auto_nearest(data, nr, val, data->conf1, &reg))) {
mutex_unlock(&data->update_lock);
return ret;
}
if (((data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1)) & ADM1031_CONF1_AUTO_MODE) ^
data->conf1 = FAN_CHAN_TO_REG(reg, data->conf1);
if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) ^
(old_fan_mode & ADM1031_CONF1_AUTO_MODE)) {
if (data->conf1 & ADM1031_CONF1_AUTO_MODE){
/* Switch to Auto Fan Mode
* Save PWM registers
/* Switch to Auto Fan Mode
* Save PWM registers
* Set PWM registers to 33% Both */
data->old_pwm[0] = data->pwm[0];
data->old_pwm[1] = data->pwm[1];
Expand All @@ -283,7 +284,7 @@ set_fan_auto_channel(struct device *dev, const char *buf, size_t count, int nr)
data->pwm[0] = data->old_pwm[0];
data->pwm[1] = data->old_pwm[1];
/* Restore PWM registers */
adm1031_write_value(client, ADM1031_REG_PWM,
adm1031_write_value(client, ADM1031_REG_PWM,
data->pwm[0] | (data->pwm[1] << 4));
}
}
Expand Down Expand Up @@ -314,7 +315,7 @@ fan_auto_channel_offset(2);
static ssize_t show_auto_temp_off(struct device *dev, char *buf, int nr)
{
struct adm1031_data *data = adm1031_update_device(dev);
return sprintf(buf, "%d\n",
return sprintf(buf, "%d\n",
AUTO_TEMP_OFF_FROM_REG(data->auto_temp[nr]));
}
static ssize_t show_auto_temp_min(struct device *dev, char *buf, int nr)
Expand Down Expand Up @@ -407,7 +408,7 @@ set_pwm(struct device *dev, const char *buf, size_t count, int nr)
int reg;

mutex_lock(&data->update_lock);
if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
if ((data->conf1 & ADM1031_CONF1_AUTO_MODE) &&
(((val>>4) & 0xf) != 5)) {
/* In automatic mode, the only PWM accepted is 33% */
mutex_unlock(&data->update_lock);
Expand Down Expand Up @@ -471,7 +472,7 @@ static int trust_fan_readings(struct adm1031_data *data, int chan)
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[0])
|| data->temp[1] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[1])
|| (data->chip_type == adm1031
|| (data->chip_type == adm1031
&& data->temp[2] >=
AUTO_TEMP_MIN_FROM_REG_DEG(data->auto_temp[2]));
break;
Expand Down Expand Up @@ -514,7 +515,7 @@ set_fan_min(struct device *dev, const char *buf, size_t count, int nr)

mutex_lock(&data->update_lock);
if (val) {
data->fan_min[nr] =
data->fan_min[nr] =
FAN_TO_REG(val, FAN_DIV_FROM_REG(data->fan_div[nr]));
} else {
data->fan_min[nr] = 0xff;
Expand All @@ -535,12 +536,12 @@ set_fan_div(struct device *dev, const char *buf, size_t count, int nr)

tmp = val == 8 ? 0xc0 :
val == 4 ? 0x80 :
val == 2 ? 0x40 :
val == 1 ? 0x00 :
val == 2 ? 0x40 :
val == 1 ? 0x00 :
0xff;
if (tmp == 0xff)
return -EINVAL;

mutex_lock(&data->update_lock);
/* Get fresh readings */
data->fan_div[nr] = adm1031_read_value(client,
Expand All @@ -550,14 +551,13 @@ set_fan_div(struct device *dev, const char *buf, size_t count, int nr)

/* Write the new clock divider and fan min */
old_div = FAN_DIV_FROM_REG(data->fan_div[nr]);
data->fan_div[nr] = (tmp & 0xC0) | (0x3f & data->fan_div[nr]);
new_min = data->fan_min[nr] * old_div /
FAN_DIV_FROM_REG(data->fan_div[nr]);
data->fan_div[nr] = tmp | (0x3f & data->fan_div[nr]);
new_min = data->fan_min[nr] * old_div / val;
data->fan_min[nr] = new_min > 0xff ? 0xff : new_min;

adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
adm1031_write_value(client, ADM1031_REG_FAN_DIV(nr),
data->fan_div[nr]);
adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
adm1031_write_value(client, ADM1031_REG_FAN_MIN(nr),
data->fan_min[nr]);

/* Invalidate the cache: fan speed is no longer valid */
Expand Down Expand Up @@ -796,7 +796,7 @@ static const struct attribute_group adm1031_group_opt = {
/* This function is called by i2c_probe */
static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
{
struct i2c_client *new_client;
struct i2c_client *client;
struct adm1031_data *data;
int err = 0;
const char *name = "";
Expand All @@ -809,17 +809,16 @@ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
goto exit;
}

new_client = &data->client;
i2c_set_clientdata(new_client, data);
new_client->addr = address;
new_client->adapter = adapter;
new_client->driver = &adm1031_driver;
new_client->flags = 0;
client = &data->client;
i2c_set_clientdata(client, data);
client->addr = address;
client->adapter = adapter;
client->driver = &adm1031_driver;

if (kind < 0) {
int id, co;
id = i2c_smbus_read_byte_data(new_client, 0x3d);
co = i2c_smbus_read_byte_data(new_client, 0x3e);
id = i2c_smbus_read_byte_data(client, 0x3d);
co = i2c_smbus_read_byte_data(client, 0x3e);

if (!((id == 0x31 || id == 0x30) && co == 0x41))
goto exit_free;
Expand All @@ -840,28 +839,27 @@ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
}
data->chip_type = kind;

strlcpy(new_client->name, name, I2C_NAME_SIZE);
data->valid = 0;
strlcpy(client->name, name, I2C_NAME_SIZE);
mutex_init(&data->update_lock);

/* Tell the I2C layer a new client has arrived */
if ((err = i2c_attach_client(new_client)))
if ((err = i2c_attach_client(client)))
goto exit_free;

/* Initialize the ADM1031 chip */
adm1031_init_client(new_client);
adm1031_init_client(client);

/* Register sysfs hooks */
if ((err = sysfs_create_group(&new_client->dev.kobj, &adm1031_group)))
if ((err = sysfs_create_group(&client->dev.kobj, &adm1031_group)))
goto exit_detach;

if (kind == adm1031) {
if ((err = sysfs_create_group(&new_client->dev.kobj,
if ((err = sysfs_create_group(&client->dev.kobj,
&adm1031_group_opt)))
goto exit_remove;
}

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 exit_remove;
Expand All @@ -870,10 +868,10 @@ static int adm1031_detect(struct i2c_adapter *adapter, int address, int kind)
return 0;

exit_remove:
sysfs_remove_group(&new_client->dev.kobj, &adm1031_group);
sysfs_remove_group(&new_client->dev.kobj, &adm1031_group_opt);
sysfs_remove_group(&client->dev.kobj, &adm1031_group);
sysfs_remove_group(&client->dev.kobj, &adm1031_group_opt);
exit_detach:
i2c_detach_client(new_client);
i2c_detach_client(client);
exit_free:
kfree(data);
exit:
Expand Down Expand Up @@ -905,7 +903,7 @@ static void adm1031_init_client(struct i2c_client *client)
if (data->chip_type == adm1031) {
mask |= (ADM1031_CONF2_PWM2_ENABLE |
ADM1031_CONF2_TACH2_ENABLE);
}
}
/* Initialize the ADM1031 chip (enables fan speed reading ) */
read_val = adm1031_read_value(client, ADM1031_REG_CONF2);
if ((read_val | mask) != read_val) {
Expand Down Expand Up @@ -984,7 +982,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
if (data->chip_type == adm1030) {
data->alarm &= 0xc0ff;
}

for (chan=0; chan<(data->chip_type == adm1030 ? 1 : 2); chan++) {
data->fan_div[chan] =
adm1031_read_value(client, ADM1031_REG_FAN_DIV(chan));
Expand All @@ -993,7 +991,7 @@ static struct adm1031_data *adm1031_update_device(struct device *dev)
data->fan[chan] =
adm1031_read_value(client, ADM1031_REG_FAN_SPEED(chan));
data->pwm[chan] =
0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
0xf & (adm1031_read_value(client, ADM1031_REG_PWM) >>
(4*chan));
}
data->last_updated = jiffies;
Expand Down

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