Cc: Marc Hulsman <m.hulsman@xxxxxxxxxx>
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
---
drivers/hwmon/w83791d.c | 211 +++++++++++++++++++++++++++--------------------
1 files changed, 122 insertions(+), 89 deletions(-)
diff --git a/drivers/hwmon/w83791d.c b/drivers/hwmon/w83791d.c
index 679146d..5fbea95 100644
--- a/drivers/hwmon/w83791d.c
+++ b/drivers/hwmon/w83791d.c
@@ -1,36 +1,36 @@
/*
- w83791d.c - Part of lm_sensors, Linux kernel modules for hardware
- monitoring
-
- Copyright (C) 2006-2007 Charles Spirakis <bezaur@xxxxxxxxx>
-
- 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
- (at your option) any later version.
-
- 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., 675 Mass Ave, Cambridge, MA 02139, USA.
-*/
+ * w83791d.c - Part of lm_sensors, Linux kernel modules for hardware
+ * monitoring
+ *
+ * Copyright (C) 2006-2007 Charles Spirakis <bezaur@xxxxxxxxx>
+ *
+ * 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
+ * (at your option) any later version.
+ *
+ * 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
/*
- Supports following chips:
-
- Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
- w83791d 10 5 5 3 0x71 0x5ca3 yes no
-
- The w83791d chip appears to be part way between the 83781d and the
- 83792d. Thus, this file is derived from both the w83792d.c and
- w83781d.c files.
-
- The w83791g chip is the same as the w83791d but lead-free.
-*/
+ * Supports following chips:
+ *
+ * Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
+ * w83791d 10 5 5 3 0x71 0x5ca3 yes no
+ *
+ * The w83791d chip appears to be part way between the 83781d and the
+ * 83792d. Thus, this file is derived from both the w83792d.c and
+ * w83781d.c files.
+ *
+ * The w83791g chip is the same as the w83791d but lead-free.
+ */
#include <linux/module.h>
#include <linux/init.h>
@@ -198,10 +198,12 @@ static const u8 W83791D_REG_BEEP_CTRL[3] = {
#define W83791D_REG_VBAT 0x5D
#define W83791D_REG_I2C_ADDR 0x48
-/* The SMBus locks itself. The Winbond W83791D has a bank select register
- (index 0x4e), but the driver only accesses registers in bank 0. Since
- we don't switch banks, we don't need any special code to handle
- locking access between bank switches */
+/*
+ * The SMBus locks itself. The Winbond W83791D has a bank select register
+ * (index 0x4e), but the driver only accesses registers in bank 0. Since
+ * we don't switch banks, we don't need any special code to handle
+ * locking access between bank switches
+ */
static inline int w83791d_read(struct i2c_client *client, u8 reg)
{
return i2c_smbus_read_byte_data(client, reg);
@@ -212,9 +214,11 @@ static inline int w83791d_write(struct i2c_client *client, u8 reg, u8 value)
return i2c_smbus_write_byte_data(client, reg, value);
}
-/* The analog voltage inputs have 16mV LSB. Since the sysfs output is
- in mV as would be measured on the chip input pin, need to just
- multiply/divide by 16 to translate from/to register values. */
+/*
+ * The analog voltage inputs have 16mV LSB. Since the sysfs output is
+ * in mV as would be measured on the chip input pin, need to just
+ * multiply/divide by 16 to translate from/to register values.
+ */
#define IN_TO_REG(val) (SENSORS_LIMIT((((val) + 8) / 16), 0, 255))
#define IN_FROM_REG(val) ((val) * 16)
@@ -237,10 +241,12 @@ static u8 fan_to_reg(long rpm, int div)
(val) < 0 ? ((val) - 500) / 1000 : \
((val) + 500) / 1000)
-/* for temp2 and temp3 which are 9-bit resolution, LSB = 0.5 degree Celsius
- Assumes the top 8 bits are the integral amount and the bottom 8 bits
- are the fractional amount. Since we only have 0.5 degree resolution,
- the bottom 7 bits will always be zero */
+/*
+ * for temp2 and temp3 which are 9-bit resolution, LSB = 0.5 degree Celsius
+ * Assumes the top 8 bits are the integral amount and the bottom 8 bits
+ * are the fractional amount. Since we only have 0.5 degree resolution,
+ * the bottom 7 bits will always be zero
+ */
#define TEMP23_FROM_REG(val) ((val) / 128 * 500)
#define TEMP23_TO_REG(val) ((val) <= -128000 ? 0x8000 : \
(val) >= 127500 ? 0x7F80 : \
@@ -299,18 +305,22 @@ struct w83791d_data {
/* Temperature sensors */
s8 temp1[3]; /* current, over, thyst */
- s16 temp_add[2][3]; /* fixed point value. Top 8 bits are the
- integral part, bottom 8 bits are the
- fractional part. We only use the top
- 9 bits as the resolution is only
- to the 0.5 degree C...
- two sensors with three values
- (cur, over, hyst) */
+ s16 temp_add[2][3]; /*
+ * fixed point value. Top 8 bits are the
+ * integral part, bottom 8 bits are the
+ * fractional part. We only use the top
+ * 9 bits as the resolution is only
+ * to the 0.5 degree C...
+ * two sensors with three values
+ * (cur, over, hyst)
+ */
/* PWMs */
u8 pwm[5]; /* pwm duty cycle */
- u8 pwm_enable[3]; /* pwm enable status for fan 1-3
- (fan 4-5 only support manual mode) */
+ u8 pwm_enable[3]; /*
+ * pwm enable status for fan 1-3
+ * (fan 4-5 only support manual mode)
+ */
u8 temp_target[3]; /* pwm 1-3 target temperature */
u8 temp_tolerance[3]; /* pwm 1-3 temperature tolerance */
@@ -494,8 +504,10 @@ static ssize_t show_alarm(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%d\n", (data->alarms >> bitnr) & 1);
}
-/* Note: The bitmask for the beep enable/disable is different than
- the bitmask for the alarm. */
+/*
+ * Note: The bitmask for the beep enable/disable is different than
+ * the bitmask for the alarm.
+ */
static struct sensor_device_attribute sda_in_beep[] = {
SENSOR_ATTR(in0_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 0),
SENSOR_ATTR(in1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 13),
@@ -568,10 +580,12 @@ static ssize_t show_fan_div(struct device *dev, struct device_attribute *attr,
return sprintf(buf, "%u\n", DIV_FROM_REG(data->fan_div[nr]));
}
-/* Note: we save and restore the fan minimum here, because its value is
- determined in part by the fan divisor. This follows the principle of
- least surprise; the user doesn't expect the fan minimum to change just
- because the divisor changed. */
+/*
+ * Note: we save and restore the fan minimum here, because its value is
+ * determined in part by the fan divisor. This follows the principle of
+ * least surprise; the user doesn't expect the fan minimum to change just
+ * because the divisor changed.
+ */
static ssize_t store_fan_div(struct device *dev, struct device_attribute *attr,
const char *buf, size_t count)
{
@@ -1015,8 +1029,10 @@ static struct sensor_device_attribute_2 sda_temp_max_hyst[] = {
show_temp23, store_temp23, 1, 2),
};
-/* Note: The bitmask for the beep enable/disable is different than
- the bitmask for the alarm. */
+/*
+ * Note: The bitmask for the beep enable/disable is different than
+ * the bitmask for the alarm.
+ */
static struct sensor_device_attribute sda_temp_beep[] = {
SENSOR_ATTR(temp1_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 4),
SENSOR_ATTR(temp2_beep, S_IWUSR | S_IRUGO, show_beep, store_beep, 5),
@@ -1075,8 +1091,10 @@ static ssize_t store_beep_mask(struct device *dev,
mutex_lock(&data->update_lock);
- /* The beep_enable state overrides any enabling request from
- the masks */
+ /*
+ * The beep_enable state overrides any enabling request from
+ * the masks
+ */
data->beep_mask = BEEP_MASK_TO_REG(val) & ~GLOBAL_BEEP_ENABLE_MASK;
data->beep_mask |= (data->beep_enable << GLOBAL_BEEP_ENABLE_SHIFT);
@@ -1113,8 +1131,10 @@ static ssize_t store_beep_enable(struct device *dev,
data->beep_mask &= ~GLOBAL_BEEP_ENABLE_MASK;
data->beep_mask |= (data->beep_enable << GLOBAL_BEEP_ENABLE_SHIFT);
- /* The global control is in the second beep control register
- so only need to update that register */
+ /*
+ * The global control is in the second beep control register
+ * so only need to update that register
+ */
val = (data->beep_mask >> 8) & 0xff;
w83791d_write(client, W83791D_REG_BEEP_CTRL[1], val);
@@ -1156,9 +1176,11 @@ static ssize_t store_vrm_reg(struct device *dev,
unsigned long val;
int err;
- /* No lock needed as vrm is internal to the driver
- (not read from a chip register) and so is not
- updated in w83791d_update_device() */
+ /*
+ * No lock needed as vrm is internal to the driver
+ * (not read from a chip register) and so is not
+ * updated in w83791d_update_device()
+ */
err = kstrtoul(buf, 10, &val);
if (err)
@@ -1232,9 +1254,11 @@ static const struct attribute_group w83791d_group = {
.attrs = w83791d_attributes,
};
-/* Separate group of attributes for fan/pwm 4-5. Their pins can also be
- in use for GPIO in which case their sysfs-interface should not be made
- available */
+/*
+ * Separate group of attributes for fan/pwm 4-5. Their pins can also be
+ * in use for GPIO in which case their sysfs-interface should not be made
+ * available
+ */
static struct attribute *w83791d_attributes_fanpwm45[] = {
FAN_UNIT_ATTRS(3),
FAN_UNIT_ATTRS(4),
@@ -1325,8 +1349,10 @@ static int w83791d_detect(struct i2c_client *client,
return -ENODEV;
}
}
- /* If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
- should match */
+ /*
+ * If Winbond chip, address of chip and W83791D_REG_I2C_ADDR
+ * should match
+ */
if (w83791d_read(client, W83791D_REG_I2C_ADDR) != address)
return -ENODEV;
@@ -1376,8 +1402,10 @@ static int w83791d_probe(struct i2c_client *client,
/* Initialize the chip */
w83791d_init_client(client);
- /* If the fan_div is changed, make sure there is a rational
- fan_min in place */
+ /*
+ * If the fan_div is changed, make sure there is a rational
+ * fan_min in place
+ */
for (i = 0; i < NUMBER_OF_FANIN; i++)
data->fan_min[i] = w83791d_read(client, W83791D_REG_FAN_MIN[i]);
@@ -1442,19 +1470,20 @@ static void w83791d_init_client(struct i2c_client *client)
u8 tmp;
u8 old_beep;
- /* The difference between reset and init is that reset
- does a hard reset of the chip via index 0x40, bit 7,
- but init simply forces certain registers to have "sane"
- values. The hope is that the BIOS has done the right
- thing (which is why the default is reset=0, init=0),
- but if not, reset is the hard hammer and init
- is the soft mallet both of which are trying to whack
- things into place...
- NOTE: The data sheet makes a distinction between
- "power on defaults" and "reset by MR". As far as I can tell,
- the hard reset puts everything into a power-on state so I'm
- not sure what "reset by MR" means or how it can happen.
- */
+ /*
+ * The difference between reset and init is that reset
+ * does a hard reset of the chip via index 0x40, bit 7,
+ * but init simply forces certain registers to have "sane"
+ * values. The hope is that the BIOS has done the right
+ * thing (which is why the default is reset=0, init=0),
+ * but if not, reset is the hard hammer and init
+ * is the soft mallet both of which are trying to whack
+ * things into place...
+ * NOTE: The data sheet makes a distinction between
+ * "power on defaults" and "reset by MR". As far as I can tell,
+ * the hard reset puts everything into a power-on state so I'm
+ * not sure what "reset by MR" means or how it can happen.
+ */
if (reset || init) {
/* keep some BIOS settings when we... */
old_beep = w83791d_read(client, W83791D_REG_BEEP_CONFIG);
@@ -1538,8 +1567,10 @@ static struct w83791d_data *w83791d_update_device(struct device *dev)
data->fan_div[3] = reg_array_tmp[2] & 0x07;
data->fan_div[4] = (reg_array_tmp[2] >> 4) & 0x07;
- /* The fan divisor for fans 0-2 get bit 2 from
- bits 5-7 respectively of vbat register */
+ /*
+ * The fan divisor for fans 0-2 get bit 2 from
+ * bits 5-7 respectively of vbat register
+ */
vbat_reg = w83791d_read(client, W83791D_REG_VBAT);
for (i = 0; i < 3; i++)
data->fan_div[i] |= (vbat_reg >> (3 + i)) & 0x04;
@@ -1645,8 +1676,10 @@ static void w83791d_print_debug(struct w83791d_data *data, struct device *dev)
dev_dbg(dev, "fan_div[%d] is: 0x%02x\n", i, data->fan_div[i]);
}
- /* temperature math is signed, but only print out the
- bits that matter */
+ /*
+ * temperature math is signed, but only print out the
+ * bits that matter
+ */
dev_dbg(dev, "%d set of Temperatures: ===>\n", NUMBER_OF_TEMPIN);
for (i = 0; i < 3; i++)
dev_dbg(dev, "temp1[%d] is: 0x%02x\n", i, (u8) data->temp1[i]);
--
1.7.5.4
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