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path: root/drivers/hwmon/max6650.c
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Diffstat (limited to 'drivers/hwmon/max6650.c')
-rw-r--r--drivers/hwmon/max6650.c177
1 files changed, 92 insertions, 85 deletions
diff --git a/drivers/hwmon/max6650.c b/drivers/hwmon/max6650.c
index 2fc034aeca09..33a8a7f15e18 100644
--- a/drivers/hwmon/max6650.c
+++ b/drivers/hwmon/max6650.c
@@ -135,8 +135,7 @@ static struct i2c_driver max6650_driver = {
* Client data (each client gets its own)
*/
-struct max6650_data
-{
+struct max6650_data {
struct device *hwmon_dev;
struct mutex update_lock;
int nr_fans;
@@ -160,13 +159,13 @@ static ssize_t get_fan(struct device *dev, struct device_attribute *devattr,
int rpm;
/*
- * Calculation details:
- *
- * Each tachometer counts over an interval given by the "count"
- * register (0.25, 0.5, 1 or 2 seconds). This module assumes
- * that the fans produce two pulses per revolution (this seems
- * to be the most common).
- */
+ * Calculation details:
+ *
+ * Each tachometer counts over an interval given by the "count"
+ * register (0.25, 0.5, 1 or 2 seconds). This module assumes
+ * that the fans produce two pulses per revolution (this seems
+ * to be the most common).
+ */
rpm = ((data->tach[attr->index] * 120) / DIV_FROM_REG(data->count));
return sprintf(buf, "%d\n", rpm);
@@ -220,12 +219,12 @@ static ssize_t get_target(struct device *dev, struct device_attribute *devattr,
int kscale, ktach, rpm;
/*
- * Use the datasheet equation:
- *
- * FanSpeed = KSCALE x fCLK / [256 x (KTACH + 1)]
- *
- * then multiply by 60 to give rpm.
- */
+ * Use the datasheet equation:
+ *
+ * FanSpeed = KSCALE x fCLK / [256 x (KTACH + 1)]
+ *
+ * then multiply by 60 to give rpm.
+ */
kscale = DIV_FROM_REG(data->config);
ktach = data->speed;
@@ -238,17 +237,22 @@ static ssize_t set_target(struct device *dev, struct device_attribute *devattr,
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
- int rpm = simple_strtoul(buf, NULL, 10);
int kscale, ktach;
+ unsigned long rpm;
+ int err;
+
+ err = kstrtoul(buf, 10, &rpm);
+ if (err)
+ return err;
rpm = SENSORS_LIMIT(rpm, FAN_RPM_MIN, FAN_RPM_MAX);
/*
- * Divide the required speed by 60 to get from rpm to rps, then
- * use the datasheet equation:
- *
- * KTACH = [(fCLK x KSCALE) / (256 x FanSpeed)] - 1
- */
+ * Divide the required speed by 60 to get from rpm to rps, then
+ * use the datasheet equation:
+ *
+ * KTACH = [(fCLK x KSCALE) / (256 x FanSpeed)] - 1
+ */
mutex_lock(&data->update_lock);
@@ -282,8 +286,10 @@ static ssize_t get_pwm(struct device *dev, struct device_attribute *devattr,
int pwm;
struct max6650_data *data = max6650_update_device(dev);
- /* Useful range for dac is 0-180 for 12V fans and 0-76 for 5V fans.
- Lower DAC values mean higher speeds. */
+ /*
+ * Useful range for dac is 0-180 for 12V fans and 0-76 for 5V fans.
+ * Lower DAC values mean higher speeds.
+ */
if (data->config & MAX6650_CFG_V12)
pwm = 255 - (255 * (int)data->dac)/180;
else
@@ -300,7 +306,12 @@ static ssize_t set_pwm(struct device *dev, struct device_attribute *devattr,
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
- int pwm = simple_strtoul(buf, NULL, 10);
+ unsigned long pwm;
+ int err;
+
+ err = kstrtoul(buf, 10, &pwm);
+ if (err)
+ return err;
pwm = SENSORS_LIMIT(pwm, 0, 255);
@@ -341,14 +352,16 @@ static ssize_t set_enable(struct device *dev, struct device_attribute *devattr,
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
- int mode = simple_strtoul(buf, NULL, 10);
int max6650_modes[3] = {0, 3, 2};
+ unsigned long mode;
+ int err;
- if ((mode < 0)||(mode > 2)) {
- dev_err(&client->dev,
- "illegal value for pwm1_enable (%d)\n", mode);
+ err = kstrtoul(buf, 10, &mode);
+ if (err)
+ return err;
+
+ if (mode > 2)
return -EINVAL;
- }
mutex_lock(&data->update_lock);
@@ -389,7 +402,12 @@ static ssize_t set_div(struct device *dev, struct device_attribute *devattr,
{
struct i2c_client *client = to_i2c_client(dev);
struct max6650_data *data = i2c_get_clientdata(client);
- int div = simple_strtoul(buf, NULL, 10);
+ unsigned long div;
+ int err;
+
+ err = kstrtoul(buf, 10, &div);
+ if (err)
+ return err;
mutex_lock(&data->update_lock);
switch (div) {
@@ -407,8 +425,6 @@ static ssize_t set_div(struct device *dev, struct device_attribute *devattr,
break;
default:
mutex_unlock(&data->update_lock);
- dev_err(&client->dev,
- "illegal value for fan divider (%d)\n", div);
return -EINVAL;
}
@@ -529,7 +545,8 @@ static int max6650_probe(struct i2c_client *client,
struct max6650_data *data;
int err;
- if (!(data = kzalloc(sizeof(struct max6650_data), GFP_KERNEL))) {
+ data = kzalloc(sizeof(struct max6650_data), GFP_KERNEL);
+ if (!data) {
dev_err(&client->dev, "out of memory.\n");
return -ENOMEM;
}
@@ -596,55 +613,54 @@ static int max6650_init_client(struct i2c_client *client)
}
switch (fan_voltage) {
- case 0:
- break;
- case 5:
- config &= ~MAX6650_CFG_V12;
- break;
- case 12:
- config |= MAX6650_CFG_V12;
- break;
- default:
- dev_err(&client->dev,
- "illegal value for fan_voltage (%d)\n",
- fan_voltage);
+ case 0:
+ break;
+ case 5:
+ config &= ~MAX6650_CFG_V12;
+ break;
+ case 12:
+ config |= MAX6650_CFG_V12;
+ break;
+ default:
+ dev_err(&client->dev, "illegal value for fan_voltage (%d)\n",
+ fan_voltage);
}
dev_info(&client->dev, "Fan voltage is set to %dV.\n",
(config & MAX6650_CFG_V12) ? 12 : 5);
switch (prescaler) {
- case 0:
- break;
- case 1:
- config &= ~MAX6650_CFG_PRESCALER_MASK;
- break;
- case 2:
- config = (config & ~MAX6650_CFG_PRESCALER_MASK)
- | MAX6650_CFG_PRESCALER_2;
- break;
- case 4:
- config = (config & ~MAX6650_CFG_PRESCALER_MASK)
- | MAX6650_CFG_PRESCALER_4;
- break;
- case 8:
- config = (config & ~MAX6650_CFG_PRESCALER_MASK)
- | MAX6650_CFG_PRESCALER_8;
- break;
- case 16:
- config = (config & ~MAX6650_CFG_PRESCALER_MASK)
- | MAX6650_CFG_PRESCALER_16;
- break;
- default:
- dev_err(&client->dev,
- "illegal value for prescaler (%d)\n",
- prescaler);
+ case 0:
+ break;
+ case 1:
+ config &= ~MAX6650_CFG_PRESCALER_MASK;
+ break;
+ case 2:
+ config = (config & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_2;
+ break;
+ case 4:
+ config = (config & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_4;
+ break;
+ case 8:
+ config = (config & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_8;
+ break;
+ case 16:
+ config = (config & ~MAX6650_CFG_PRESCALER_MASK)
+ | MAX6650_CFG_PRESCALER_16;
+ break;
+ default:
+ dev_err(&client->dev, "illegal value for prescaler (%d)\n",
+ prescaler);
}
dev_info(&client->dev, "Prescaler is set to %d.\n",
1 << (config & MAX6650_CFG_PRESCALER_MASK));
- /* If mode is set to "full off", we change it to "open loop" and
+ /*
+ * If mode is set to "full off", we change it to "open loop" and
* set DAC to 255, which has the same effect. We do this because
* there's no "full off" mode defined in hwmon specifcations.
*/
@@ -698,9 +714,11 @@ static struct max6650_data *max6650_update_device(struct device *dev)
MAX6650_REG_COUNT);
data->dac = i2c_smbus_read_byte_data(client, MAX6650_REG_DAC);
- /* Alarms are cleared on read in case the condition that
+ /*
+ * Alarms are cleared on read in case the condition that
* caused the alarm is removed. Keep the value latched here
- * for providing the register through different alarm files. */
+ * for providing the register through different alarm files.
+ */
data->alarm |= i2c_smbus_read_byte_data(client,
MAX6650_REG_ALARM);
@@ -713,19 +731,8 @@ static struct max6650_data *max6650_update_device(struct device *dev)
return data;
}
-static int __init sensors_max6650_init(void)
-{
- return i2c_add_driver(&max6650_driver);
-}
-
-static void __exit sensors_max6650_exit(void)
-{
- i2c_del_driver(&max6650_driver);
-}
+module_i2c_driver(max6650_driver);
MODULE_AUTHOR("Hans J. Koch");
MODULE_DESCRIPTION("MAX6650 sensor driver");
MODULE_LICENSE("GPL");
-
-module_init(sensors_max6650_init);
-module_exit(sensors_max6650_exit);
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-24 13:06:36 +0000