hwmon: (w83793) Fix checkpatch issues
Fixed:
ERROR: code indent should use tabs where possible
ERROR: do not use assignment in if condition
ERROR: space required after that ',' (ctx:VxV)
WARNING: braces {} are not necessary for any arm of this statement
WARNING: braces {} are not necessary for single statement blocks
WARNING: simple_strtol is obsolete, use kstrtol instead
WARNING: simple_strtoul is obsolete, use kstrtoul instead
Modify multi-line comments to follow Documentation/CodingStyle.
Also replaced "<constant> == <variable>" with "<variable> == <constant>".
Translation was done with the following coccinelle script to limit risk.
@@
identifier i;
constant C;
@@
<...
- C == i
+ i == C
...>
Not fixed (false positive):
ERROR: Macros with complex values should be enclosed in parenthesis
Cc: Rudolf Marek <r.marek@assembler.cz>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
diff --git a/drivers/hwmon/w83793.c b/drivers/hwmon/w83793.c
index 742bf13..834e49d 100644
--- a/drivers/hwmon/w83793.c
+++ b/drivers/hwmon/w83793.c
@@ -1,34 +1,34 @@
/*
- w83793.c - Linux kernel driver for hardware monitoring
- Copyright (C) 2006 Winbond Electronics Corp.
- Yuan Mu
- Rudolf Marek <r.marek@assembler.cz>
- Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
- Watchdog driver part
- (Based partially on fschmd driver,
- Copyright 2007-2008 by Hans de Goede)
-
- 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 - version 2.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301 USA.
-*/
+ * w83793.c - Linux kernel driver for hardware monitoring
+ * Copyright (C) 2006 Winbond Electronics Corp.
+ * Yuan Mu
+ * Rudolf Marek <r.marek@assembler.cz>
+ * Copyright (C) 2009-2010 Sven Anders <anders@anduras.de>, ANDURAS AG.
+ * Watchdog driver part
+ * (Based partially on fschmd driver,
+ * Copyright 2007-2008 by Hans de Goede)
+ *
+ * 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 - version 2.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA.
+ */
/*
- Supports following chips:
-
- Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
- w83793 10 12 8 6 0x7b 0x5ca3 yes no
-*/
+ * Supports following chips:
+ *
+ * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
+ * w83793 10 12 8 6 0x7b 0x5ca3 yes no
+ */
#include <linux/module.h>
#include <linux/init.h>
@@ -78,9 +78,9 @@
__MODULE_STRING(WATCHDOG_NOWAYOUT) ")");
/*
- Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
- as ID, Bank Select registers
-*/
+ * Address 0x00, 0x0d, 0x0e, 0x0f in all three banks are reserved
+ * as ID, Bank Select registers
+ */
#define W83793_REG_BANKSEL 0x00
#define W83793_REG_VENDORID 0x0d
#define W83793_REG_CHIPID 0x0e
@@ -110,8 +110,10 @@
#define TEMP_CRIT_HYST 2
#define TEMP_WARN 3
#define TEMP_WARN_HYST 4
-/* only crit and crit_hyst affect real-time alarm status
- current crit crit_hyst warn warn_hyst */
+/*
+ * only crit and crit_hyst affect real-time alarm status
+ * current crit crit_hyst warn warn_hyst
+ */
static u16 W83793_REG_TEMP[][5] = {
{0x1c, 0x78, 0x79, 0x7a, 0x7b},
{0x1d, 0x7c, 0x7d, 0x7e, 0x7f},
@@ -218,7 +220,8 @@
char valid; /* !=0 if following fields are valid */
unsigned long last_updated; /* In jiffies */
unsigned long last_nonvolatile; /* In jiffies, last time we update the
- nonvolatile registers */
+ * nonvolatile registers
+ */
u8 bank;
u8 vrm;
@@ -233,7 +236,8 @@
s8 temp[6][5]; /* current, crit, crit_hyst,warn, warn_hyst */
u8 temp_low_bits; /* Additional resolution TD1-TD4 */
u8 temp_mode[2]; /* byte 0: Temp D1-D4 mode each has 2 bits
- byte 1: Temp R1,R2 mode, each has 1 bit */
+ * byte 1: Temp R1,R2 mode, each has 1 bit
+ */
u8 temp_critical; /* If reached all fan will be at full speed */
u8 temp_fan_map[6]; /* Temp controls which pwm fan, bit field */
@@ -268,17 +272,21 @@
int watchdog_timeout; /* watchdog timeout in minutes */
};
-/* Somewhat ugly :( global data pointer list with all devices, so that
- we can find our device data as when using misc_register. There is no
- other method to get to one's device data from the open file-op and
- for usage in the reboot notifier callback. */
+/*
+ * Somewhat ugly :( global data pointer list with all devices, so that
+ * we can find our device data as when using misc_register. There is no
+ * other method to get to one's device data from the open file-op and
+ * for usage in the reboot notifier callback.
+ */
static LIST_HEAD(watchdog_data_list);
/* Note this lock not only protect list access, but also data.kref access */
static DEFINE_MUTEX(watchdog_data_mutex);
-/* Release our data struct when we're detached from the i2c client *and* all
- references to our watchdog device are released */
+/*
+ * Release our data struct when we're detached from the i2c client *and* all
+ * references to our watchdog device are released
+ */
static void w83793_release_resources(struct kref *ref)
{
struct w83793_data *data = container_of(ref, struct w83793_data, kref);
@@ -337,7 +345,14 @@
const char *buf, size_t count)
{
struct w83793_data *data = dev_get_drvdata(dev);
- data->vrm = simple_strtoul(buf, NULL, 10);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ data->vrm = val;
return count;
}
@@ -354,7 +369,7 @@
int bit = sensor_attr->index & 0x07;
u8 val;
- if (ALARM_STATUS == nr) {
+ if (nr == ALARM_STATUS) {
val = (data->alarms[index] >> (bit)) & 1;
} else { /* BEEP_ENABLE */
val = (data->beeps[index] >> (bit)) & 1;
@@ -374,10 +389,14 @@
int index = sensor_attr->index >> 3;
int shift = sensor_attr->index & 0x07;
u8 beep_bit = 1 << shift;
- u8 val;
+ unsigned long val;
+ int err;
- val = simple_strtoul(buf, NULL, 10);
- if (val != 0 && val != 1)
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (val > 1)
return -EINVAL;
mutex_lock(&data->update_lock);
@@ -403,9 +422,14 @@
{
struct i2c_client *client = to_i2c_client(dev);
struct w83793_data *data = i2c_get_clientdata(client);
- u8 val = simple_strtoul(buf, NULL, 10);
+ unsigned long val;
+ int err;
- if (val != 0 && val != 1)
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+
+ if (val > 1)
return -EINVAL;
mutex_lock(&data->update_lock);
@@ -449,8 +473,12 @@
struct w83793_data *data = i2c_get_clientdata(client);
unsigned long val;
u8 reg;
+ int err;
- if (kstrtoul(buf, 10, &val) || val != 0)
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ if (val)
return -EINVAL;
mutex_lock(&data->update_lock);
@@ -473,11 +501,10 @@
struct w83793_data *data = w83793_update_device(dev);
u16 val;
- if (FAN_INPUT == nr) {
+ if (nr == FAN_INPUT)
val = data->fan[index] & 0x0fff;
- } else {
+ else
val = data->fan_min[index] & 0x0fff;
- }
return sprintf(buf, "%lu\n", FAN_FROM_REG(val));
}
@@ -491,7 +518,13 @@
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83793_data *data = i2c_get_clientdata(client);
- u16 val = FAN_TO_REG(simple_strtoul(buf, NULL, 10));
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ val = FAN_TO_REG(val);
mutex_lock(&data->update_lock);
data->fan_min[index] = val;
@@ -513,7 +546,7 @@
int nr = sensor_attr->nr;
int index = sensor_attr->index;
- if (PWM_STOP_TIME == nr)
+ if (nr == PWM_STOP_TIME)
val = TIME_FROM_REG(data->pwm_stop_time[index]);
else
val = (data->pwm[index][nr] & 0x3f) << 2;
@@ -531,17 +564,21 @@
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
- u8 val;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
- if (PWM_STOP_TIME == nr) {
- val = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
+ if (nr == PWM_STOP_TIME) {
+ val = TIME_TO_REG(val);
data->pwm_stop_time[index] = val;
w83793_write_value(client, W83793_REG_PWM_STOP_TIME(index),
val);
} else {
- val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0xff)
- >> 2;
+ val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
data->pwm[index][nr] =
w83793_read_value(client, W83793_REG_PWM(index, nr)) & 0xc0;
data->pwm[index][nr] |= val;
@@ -563,7 +600,7 @@
struct w83793_data *data = w83793_update_device(dev);
long temp = TEMP_FROM_REG(data->temp[index][nr]);
- if (TEMP_READ == nr && index < 4) { /* Only TD1-TD4 have low bits */
+ if (nr == TEMP_READ && index < 4) { /* Only TD1-TD4 have low bits */
int low = ((data->temp_low_bits >> (index * 2)) & 0x03) * 250;
temp += temp > 0 ? low : -low;
}
@@ -580,7 +617,12 @@
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83793_data *data = i2c_get_clientdata(client);
- long tmp = simple_strtol(buf, NULL, 10);
+ long tmp;
+ int err;
+
+ err = kstrtol(buf, 10, &tmp);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
data->temp[index][nr] = TEMP_TO_REG(tmp, -128, 127);
@@ -591,18 +633,18 @@
}
/*
- TD1-TD4
- each has 4 mode:(2 bits)
- 0: Stop monitor
- 1: Use internal temp sensor(default)
- 2: Reserved
- 3: Use sensor in Intel CPU and get result by PECI
-
- TR1-TR2
- each has 2 mode:(1 bit)
- 0: Disable temp sensor monitor
- 1: To enable temp sensors monitor
-*/
+ * TD1-TD4
+ * each has 4 mode:(2 bits)
+ * 0: Stop monitor
+ * 1: Use internal temp sensor(default)
+ * 2: Reserved
+ * 3: Use sensor in Intel CPU and get result by PECI
+ *
+ * TR1-TR2
+ * each has 2 mode:(1 bit)
+ * 0: Disable temp sensor monitor
+ * 1: To enable temp sensors monitor
+ */
/* 0 disable, 6 PECI */
static u8 TO_TEMP_MODE[] = { 0, 0, 0, 6 };
@@ -622,11 +664,10 @@
tmp = (data->temp_mode[index] >> shift) & mask;
/* for the internal sensor, found out if diode or thermistor */
- if (tmp == 1) {
+ if (tmp == 1)
tmp = index == 0 ? 3 : 4;
- } else {
+ else
tmp = TO_TEMP_MODE[tmp];
- }
return sprintf(buf, "%d\n", tmp);
}
@@ -642,7 +683,12 @@
int index = sensor_attr->index;
u8 mask = (index < 4) ? 0x03 : 0x01;
u8 shift = (index < 4) ? (2 * index) : (index - 4);
- u8 val = simple_strtoul(buf, NULL, 10);
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
/* transform the sysfs interface values into table above */
if ((val == 6) && (index < 4)) {
@@ -681,15 +727,14 @@
struct w83793_data *data = w83793_update_device(dev);
u32 val = 0;
- if (SETUP_PWM_DEFAULT == nr) {
+ if (nr == SETUP_PWM_DEFAULT)
val = (data->pwm_default & 0x3f) << 2;
- } else if (SETUP_PWM_UPTIME == nr) {
+ else if (nr == SETUP_PWM_UPTIME)
val = TIME_FROM_REG(data->pwm_uptime);
- } else if (SETUP_PWM_DOWNTIME == nr) {
+ else if (nr == SETUP_PWM_DOWNTIME)
val = TIME_FROM_REG(data->pwm_downtime);
- } else if (SETUP_TEMP_CRITICAL == nr) {
+ else if (nr == SETUP_TEMP_CRITICAL)
val = TEMP_FROM_REG(data->temp_critical & 0x7f);
- }
return sprintf(buf, "%d\n", val);
}
@@ -703,31 +748,34 @@
int nr = sensor_attr->nr;
struct i2c_client *client = to_i2c_client(dev);
struct w83793_data *data = i2c_get_clientdata(client);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
- if (SETUP_PWM_DEFAULT == nr) {
+ if (nr == SETUP_PWM_DEFAULT) {
data->pwm_default =
w83793_read_value(client, W83793_REG_PWM_DEFAULT) & 0xc0;
- data->pwm_default |= SENSORS_LIMIT(simple_strtoul(buf, NULL,
- 10),
- 0, 0xff) >> 2;
+ data->pwm_default |= SENSORS_LIMIT(val, 0, 0xff) >> 2;
w83793_write_value(client, W83793_REG_PWM_DEFAULT,
data->pwm_default);
- } else if (SETUP_PWM_UPTIME == nr) {
- data->pwm_uptime = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
+ } else if (nr == SETUP_PWM_UPTIME) {
+ data->pwm_uptime = TIME_TO_REG(val);
data->pwm_uptime += data->pwm_uptime == 0 ? 1 : 0;
w83793_write_value(client, W83793_REG_PWM_UPTIME,
data->pwm_uptime);
- } else if (SETUP_PWM_DOWNTIME == nr) {
- data->pwm_downtime = TIME_TO_REG(simple_strtoul(buf, NULL, 10));
+ } else if (nr == SETUP_PWM_DOWNTIME) {
+ data->pwm_downtime = TIME_TO_REG(val);
data->pwm_downtime += data->pwm_downtime == 0 ? 1 : 0;
w83793_write_value(client, W83793_REG_PWM_DOWNTIME,
data->pwm_downtime);
} else { /* SETUP_TEMP_CRITICAL */
data->temp_critical =
w83793_read_value(client, W83793_REG_TEMP_CRITICAL) & 0x80;
- data->temp_critical |= TEMP_TO_REG(simple_strtol(buf, NULL, 10),
- 0, 0x7f);
+ data->temp_critical |= TEMP_TO_REG(val, 0, 0x7f);
w83793_write_value(client, W83793_REG_TEMP_CRITICAL,
data->temp_critical);
}
@@ -737,31 +785,31 @@
}
/*
- Temp SmartFan control
- TEMP_FAN_MAP
- Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
- It's possible two or more temp channels control the same fan, w83793
- always prefers to pick the most critical request and applies it to
- the related Fan.
- It's possible one fan is not in any mapping of 6 temp channels, this
- means the fan is manual mode
-
- TEMP_PWM_ENABLE
- Each temp channel has its own SmartFan mode, and temp channel
- control fans that are set by TEMP_FAN_MAP
- 0: SmartFanII mode
- 1: Thermal Cruise Mode
-
- TEMP_CRUISE
- Target temperature in thermal cruise mode, w83793 will try to turn
- fan speed to keep the temperature of target device around this
- temperature.
-
- TEMP_TOLERANCE
- If Temp higher or lower than target with this tolerance, w83793
- will take actions to speed up or slow down the fan to keep the
- temperature within the tolerance range.
-*/
+ * Temp SmartFan control
+ * TEMP_FAN_MAP
+ * Temp channel control which pwm fan, bitfield, bit 0 indicate pwm1...
+ * It's possible two or more temp channels control the same fan, w83793
+ * always prefers to pick the most critical request and applies it to
+ * the related Fan.
+ * It's possible one fan is not in any mapping of 6 temp channels, this
+ * means the fan is manual mode
+ *
+ * TEMP_PWM_ENABLE
+ * Each temp channel has its own SmartFan mode, and temp channel
+ * control fans that are set by TEMP_FAN_MAP
+ * 0: SmartFanII mode
+ * 1: Thermal Cruise Mode
+ *
+ * TEMP_CRUISE
+ * Target temperature in thermal cruise mode, w83793 will try to turn
+ * fan speed to keep the temperature of target device around this
+ * temperature.
+ *
+ * TEMP_TOLERANCE
+ * If Temp higher or lower than target with this tolerance, w83793
+ * will take actions to speed up or slow down the fan to keep the
+ * temperature within the tolerance range.
+ */
#define TEMP_FAN_MAP 0
#define TEMP_PWM_ENABLE 1
@@ -777,12 +825,12 @@
struct w83793_data *data = w83793_update_device(dev);
u32 val;
- if (TEMP_FAN_MAP == nr) {
+ if (nr == TEMP_FAN_MAP) {
val = data->temp_fan_map[index];
- } else if (TEMP_PWM_ENABLE == nr) {
+ } else if (nr == TEMP_PWM_ENABLE) {
/* +2 to transfrom into 2 and 3 to conform with sysfs intf */
val = ((data->pwm_enable >> index) & 0x01) + 2;
- } else if (TEMP_CRUISE == nr) {
+ } else if (nr == TEMP_CRUISE) {
val = TEMP_FROM_REG(data->temp_cruise[index] & 0x7f);
} else { /* TEMP_TOLERANCE */
val = data->tolerance[index >> 1] >> ((index & 0x01) ? 4 : 0);
@@ -801,16 +849,20 @@
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83793_data *data = i2c_get_clientdata(client);
- u32 val;
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
- if (TEMP_FAN_MAP == nr) {
- val = simple_strtoul(buf, NULL, 10) & 0xff;
+ if (nr == TEMP_FAN_MAP) {
+ val = SENSORS_LIMIT(val, 0, 255);
w83793_write_value(client, W83793_REG_TEMP_FAN_MAP(index), val);
data->temp_fan_map[index] = val;
- } else if (TEMP_PWM_ENABLE == nr) {
- val = simple_strtoul(buf, NULL, 10);
- if (2 == val || 3 == val) {
+ } else if (nr == TEMP_PWM_ENABLE) {
+ if (val == 2 || val == 3) {
data->pwm_enable =
w83793_read_value(client, W83793_REG_PWM_ENABLE);
if (val - 2)
@@ -823,12 +875,11 @@
mutex_unlock(&data->update_lock);
return -EINVAL;
}
- } else if (TEMP_CRUISE == nr) {
+ } else if (nr == TEMP_CRUISE) {
data->temp_cruise[index] =
w83793_read_value(client, W83793_REG_TEMP_CRUISE(index));
- val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x7f);
data->temp_cruise[index] &= 0x80;
- data->temp_cruise[index] |= val;
+ data->temp_cruise[index] |= TEMP_TO_REG(val, 0, 0x7f);
w83793_write_value(client, W83793_REG_TEMP_CRUISE(index),
data->temp_cruise[index]);
@@ -838,9 +889,8 @@
data->tolerance[i] =
w83793_read_value(client, W83793_REG_TEMP_TOL(i));
- val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x0f);
data->tolerance[i] &= ~(0x0f << shift);
- data->tolerance[i] |= val << shift;
+ data->tolerance[i] |= TEMP_TO_REG(val, 0, 0x0f) << shift;
w83793_write_value(client, W83793_REG_TEMP_TOL(i),
data->tolerance[i]);
}
@@ -871,7 +921,13 @@
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
- u8 val = SENSORS_LIMIT(simple_strtoul(buf, NULL, 10), 0, 0xff) >> 2;
+ unsigned long val;
+ int err;
+
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ val = SENSORS_LIMIT(val, 0, 0xff) >> 2;
mutex_lock(&data->update_lock);
data->sf2_pwm[index][nr] =
@@ -906,7 +962,13 @@
to_sensor_dev_attr_2(attr);
int nr = sensor_attr->nr;
int index = sensor_attr->index;
- u8 val = TEMP_TO_REG(simple_strtol(buf, NULL, 10), 0, 0x7f);
+ long val;
+ int err;
+
+ err = kstrtol(buf, 10, &val);
+ if (err)
+ return err;
+ val = TEMP_TO_REG(val, 0, 0x7f);
mutex_lock(&data->update_lock);
data->sf2_temp[index][nr] =
@@ -948,17 +1010,19 @@
int index = sensor_attr->index;
struct i2c_client *client = to_i2c_client(dev);
struct w83793_data *data = i2c_get_clientdata(client);
- u32 val;
+ unsigned long val;
+ int err;
- val =
- (simple_strtoul(buf, NULL, 10) +
- scale_in[index] / 2) / scale_in[index];
+ err = kstrtoul(buf, 10, &val);
+ if (err)
+ return err;
+ val = (val + scale_in[index] / 2) / scale_in[index];
+
mutex_lock(&data->update_lock);
if (index > 2) {
/* fix the limit values of 5VDD and 5VSB to ALARM mechanism */
- if (1 == nr || 2 == nr) {
+ if (nr == 1 || nr == 2)
val -= scale_in_add[index] / scale_in[index];
- }
val = SENSORS_LIMIT(val, 0, 255);
} else {
val = SENSORS_LIMIT(val, 0, 0x3FF);
@@ -1143,9 +1207,8 @@
static void w83793_init_client(struct i2c_client *client)
{
- if (reset) {
+ if (reset)
w83793_write_value(client, W83793_REG_CONFIG, 0x80);
- }
/* Start monitoring */
w83793_write_value(client, W83793_REG_CONFIG,
@@ -1259,10 +1322,12 @@
struct w83793_data *pos, *data = NULL;
int watchdog_is_open;
- /* We get called from drivers/char/misc.c with misc_mtx hold, and we
- call misc_register() from w83793_probe() with watchdog_data_mutex
- hold, as misc_register() takes the misc_mtx lock, this is a possible
- deadlock, so we use mutex_trylock here. */
+ /*
+ * We get called from drivers/char/misc.c with misc_mtx hold, and we
+ * call misc_register() from w83793_probe() with watchdog_data_mutex
+ * hold, as misc_register() takes the misc_mtx lock, this is a possible
+ * deadlock, so we use mutex_trylock here.
+ */
if (!mutex_trylock(&watchdog_data_mutex))
return -ERESTARTSYS;
list_for_each_entry(pos, &watchdog_data_list, list) {
@@ -1275,8 +1340,10 @@
/* Check, if device is already open */
watchdog_is_open = test_and_set_bit(0, &data->watchdog_is_open);
- /* Increase data reference counter (if not already done).
- Note we can never not have found data, so we don't check for this */
+ /*
+ * Increase data reference counter (if not already done).
+ * Note we can never not have found data, so we don't check for this
+ */
if (!watchdog_is_open)
kref_get(&data->kref);
@@ -1556,9 +1623,8 @@
}
tmp = w83793_read_value(client, W83793_REG_I2C_SUBADDR);
- if (!(tmp & 0x08)) {
+ if (!(tmp & 0x08))
data->lm75[0] = i2c_new_dummy(adapter, 0x48 + (tmp & 0x7));
- }
if (!(tmp & 0x80)) {
if ((data->lm75[0] != NULL)
&& ((tmp & 0x7) == ((tmp >> 4) & 0x7))) {
@@ -1591,9 +1657,8 @@
struct i2c_adapter *adapter = client->adapter;
unsigned short address = client->addr;
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
return -ENODEV;
- }
bank = i2c_smbus_read_byte_data(client, W83793_REG_BANKSEL);
@@ -1604,8 +1669,10 @@
return -ENODEV;
}
- /* If Winbond chip, address of chip and W83793_REG_I2C_ADDR
- should match */
+ /*
+ * If Winbond chip, address of chip and W83793_REG_I2C_ADDR
+ * should match
+ */
if ((bank & 0x07) == 0
&& i2c_smbus_read_byte_data(client, W83793_REG_I2C_ADDR) !=
(address << 1)) {
@@ -1647,9 +1714,11 @@
INIT_LIST_HEAD(&data->list);
kref_init(&data->kref);
- /* Store client pointer in our data struct for watchdog usage
- (where the client is found through a data ptr instead of the
- otherway around) */
+ /*
+ * Store client pointer in our data struct for watchdog usage
+ * (where the client is found through a data ptr instead of the
+ * otherway around)
+ */
data->client = client;
err = w83793_detect_subclients(client);
@@ -1660,8 +1729,8 @@
w83793_init_client(client);
/*
- Only fan 1-5 has their own input pins,
- Pwm 1-3 has their own pins
+ * Only fan 1-5 has their own input pins,
+ * Pwm 1-3 has their own pins
*/
data->has_fan = 0x1f;
data->has_pwm = 0x07;
@@ -1723,7 +1792,7 @@
}
/* check the temp1-6 mode, ignore former AMDSI selected inputs */
- tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[0]);
+ tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[0]);
if (tmp & 0x01)
data->has_temp |= 0x01;
if (tmp & 0x04)
@@ -1733,7 +1802,7 @@
if (tmp & 0x40)
data->has_temp |= 0x08;
- tmp = w83793_read_value(client,W83793_REG_TEMP_MODE[1]);
+ tmp = w83793_read_value(client, W83793_REG_TEMP_MODE[1]);
if (tmp & 0x01)
data->has_temp |= 0x10;
if (tmp & 0x02)
@@ -1823,9 +1892,11 @@
goto exit_devunreg;
}
- /* Enable Watchdog registers.
- Set Configuration Register to Enable Watch Dog Registers
- (Bit 2) = XXXX, X1XX. */
+ /*
+ * Enable Watchdog registers.
+ * Set Configuration Register to Enable Watch Dog Registers
+ * (Bit 2) = XXXX, X1XX.
+ */
tmp = w83793_read_value(client, W83793_REG_CONFIG);
w83793_write_value(client, W83793_REG_CONFIG, tmp | 0x04);
@@ -1839,9 +1910,11 @@
/* Disable Soft Watchdog during initialiation */
watchdog_disable(data);
- /* We take the data_mutex lock early so that watchdog_open() cannot
- run when misc_register() has completed, but we've not yet added
- our data to the watchdog_data_list (and set the default timeout) */
+ /*
+ * We take the data_mutex lock early so that watchdog_open() cannot
+ * run when misc_register() has completed, but we've not yet added
+ * our data to the watchdog_data_list (and set the default timeout)
+ */
mutex_lock(&watchdog_data_mutex);
for (i = 0; i < ARRAY_SIZE(watchdog_minors); i++) {
/* Register our watchdog part */
@@ -1921,9 +1994,9 @@
struct w83793_data *data = i2c_get_clientdata(client);
int i, j;
/*
- They are somewhat "stable" registers, and to update them every time
- takes so much time, it's just not worthy. Update them in a long
- interval to avoid exception.
+ * They are somewhat "stable" registers, and to update them every time
+ * takes so much time, it's just not worthy. Update them in a long
+ * interval to avoid exception.
*/
if (!(time_after(jiffies, data->last_nonvolatile + HZ * 300)
|| !data->valid))
@@ -1940,9 +2013,8 @@
for (i = 0; i < ARRAY_SIZE(data->fan_min); i++) {
/* Update the Fan measured value and limits */
- if (!(data->has_fan & (1 << i))) {
+ if (!(data->has_fan & (1 << i)))
continue;
- }
data->fan_min[i] =
w83793_read_value(client, W83793_REG_FAN_MIN(i)) << 8;
data->fan_min[i] |=
@@ -1997,9 +2069,8 @@
w83793_read_value(client, W83793_REG_TEMP_CRITICAL);
data->beep_enable = w83793_read_value(client, W83793_REG_OVT_BEEP);
- for (i = 0; i < ARRAY_SIZE(data->beeps); i++) {
+ for (i = 0; i < ARRAY_SIZE(data->beeps); i++)
data->beeps[i] = w83793_read_value(client, W83793_REG_BEEP(i));
- }
data->last_nonvolatile = jiffies;
}
@@ -2025,9 +2096,8 @@
w83793_read_value(client, W83793_REG_IN_LOW_BITS[IN_READ]);
for (i = 0; i < ARRAY_SIZE(data->fan); i++) {
- if (!(data->has_fan & (1 << i))) {
+ if (!(data->has_fan & (1 << i)))
continue;
- }
data->fan[i] =
w83793_read_value(client, W83793_REG_FAN(i)) << 8;
data->fan[i] |=
@@ -2067,8 +2137,10 @@
return data;
}
-/* Ignore the possibility that somebody change bank outside the driver
- Must be called with data->update_lock held, except during initialization */
+/*
+ * Ignore the possibility that somebody change bank outside the driver
+ * Must be called with data->update_lock held, except during initialization
+ */
static u8 w83793_read_value(struct i2c_client *client, u16 reg)
{
struct w83793_data *data = i2c_get_clientdata(client);
@@ -2103,16 +2175,16 @@
new_bank |= data->bank & 0xfc;
if (data->bank != new_bank) {
- if ((res = i2c_smbus_write_byte_data
- (client, W83793_REG_BANKSEL, new_bank)) >= 0)
- data->bank = new_bank;
- else {
+ res = i2c_smbus_write_byte_data(client, W83793_REG_BANKSEL,
+ new_bank);
+ if (res < 0) {
dev_err(&client->dev,
"set bank to %d failed, fall back "
"to bank %d, write reg 0x%x error\n",
new_bank, data->bank, reg);
goto END;
}
+ data->bank = new_bank;
}
res = i2c_smbus_write_byte_data(client, reg & 0xff, value);