mirror of https://gitee.com/openkylin/linux.git
hwmon: (max6650) Convert to use devm_hwmon_device_register_with_info
Convert driver to use devm_hwmon_device_register_with_info to simplify the code and to reduce its size. Cc: Jean-Francois Dagenais <jeff.dagenais@gmail.com> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This commit is contained in:
Guenter Roeck
parent
0d5cc9383e
commit
e193acb3d6
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@ -101,7 +101,6 @@ module_param(clock, int, 0444);
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struct max6650_data {
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struct i2c_client *client;
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const struct attribute_group *groups[3];
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struct mutex update_lock;
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int nr_fans;
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bool valid; /* false until following fields are valid */
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@ -216,26 +215,6 @@ static int max6650_set_operating_mode(struct max6650_data *data, u8 mode)
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return 0;
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}
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static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct sensor_device_attribute *attr = to_sensor_dev_attr(devattr);
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struct max6650_data *data = max6650_update_device(dev);
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int rpm;
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/*
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* Calculation details:
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*
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* Each tachometer counts over an interval given by the "count"
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* register (0.25, 0.5, 1 or 2 seconds). This module assumes
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* that the fans produce two pulses per revolution (this seems
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* to be the most common).
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*/
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rpm = ((data->tach[attr->index] * 120) / DIV_FROM_REG(data->count));
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return sprintf(buf, "%d\n", rpm);
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}
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/*
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* Set the fan speed to the specified RPM (or read back the RPM setting).
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* This works in closed loop mode only. Use pwm1 for open loop speed setting.
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@ -277,26 +256,6 @@ static ssize_t fan_show(struct device *dev, struct device_attribute *devattr,
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* controlled.
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*/
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static ssize_t fan1_target_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct max6650_data *data = max6650_update_device(dev);
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int kscale, ktach, rpm;
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/*
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* Use the datasheet equation:
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*
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* FanSpeed = KSCALE x fCLK / [256 x (KTACH + 1)]
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*
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* then multiply by 60 to give rpm.
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*/
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kscale = DIV_FROM_REG(data->config);
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ktach = data->speed;
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rpm = 60 * kscale * clock / (256 * (ktach + 1));
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return sprintf(buf, "%d\n", rpm);
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}
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static int max6650_set_target(struct max6650_data *data, unsigned long rpm)
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{
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int kscale, ktach;
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@ -325,183 +284,8 @@ static int max6650_set_target(struct max6650_data *data, unsigned long rpm)
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data->speed);
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}
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static ssize_t fan1_target_store(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct max6650_data *data = dev_get_drvdata(dev);
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unsigned long rpm;
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int err;
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err = kstrtoul(buf, 10, &rpm);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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err = max6650_set_target(data, rpm);
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mutex_unlock(&data->update_lock);
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if (err < 0)
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return err;
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return count;
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}
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/*
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* Get/set the fan speed in open loop mode using pwm1 sysfs file.
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* Speed is given as a relative value from 0 to 255, where 255 is maximum
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* speed. Note that this is done by writing directly to the chip's DAC,
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* it won't change the closed loop speed set by fan1_target.
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* Also note that due to rounding errors it is possible that you don't read
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* back exactly the value you have set.
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*/
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static ssize_t pwm1_show(struct device *dev, struct device_attribute *devattr,
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char *buf)
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{
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struct max6650_data *data = max6650_update_device(dev);
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return sprintf(buf, "%d\n", dac_to_pwm(data->dac,
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data->config & MAX6650_CFG_V12));
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}
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static ssize_t pwm1_store(struct device *dev,
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struct device_attribute *devattr, const char *buf,
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size_t count)
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{
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struct max6650_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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unsigned long pwm;
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int err;
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u8 dac;
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err = kstrtoul(buf, 10, &pwm);
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if (err)
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return err;
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pwm = clamp_val(pwm, 0, 255);
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mutex_lock(&data->update_lock);
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dac = pwm_to_dac(pwm, data->config & MAX6650_CFG_V12);
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err = i2c_smbus_write_byte_data(client, MAX6650_REG_DAC, dac);
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if (!err)
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data->dac = dac;
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mutex_unlock(&data->update_lock);
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return err < 0 ? err : count;
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}
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/*
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* Get/Set controller mode:
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* Possible values:
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* 0 = Fan always on
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* 1 = Open loop, Voltage is set according to speed, not regulated.
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* 2 = Closed loop, RPM for all fans regulated by fan1 tachometer
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* 3 = Fan off
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*/
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static ssize_t pwm1_enable_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct max6650_data *data = max6650_update_device(dev);
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int mode = (data->config & MAX6650_CFG_MODE_MASK) >> 4;
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int sysfs_modes[4] = {0, 3, 2, 1};
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return sprintf(buf, "%d\n", sysfs_modes[mode]);
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}
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static ssize_t pwm1_enable_store(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct max6650_data *data = dev_get_drvdata(dev);
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unsigned long mode;
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int err;
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const u8 max6650_modes[] = {
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MAX6650_CFG_MODE_ON,
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MAX6650_CFG_MODE_OPEN_LOOP,
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MAX6650_CFG_MODE_CLOSED_LOOP,
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MAX6650_CFG_MODE_OFF,
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};
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err = kstrtoul(buf, 10, &mode);
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if (err)
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return err;
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if (mode >= ARRAY_SIZE(max6650_modes))
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return -EINVAL;
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mutex_lock(&data->update_lock);
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max6650_set_operating_mode(data, max6650_modes[mode]);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/*
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* Read/write functions for fan1_div sysfs file. The MAX6650 has no such
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* divider. We handle this by converting between divider and counttime:
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*
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* (counttime == k) <==> (divider == 2^k), k = 0, 1, 2, or 3
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*
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* Lower values of k allow to connect a faster fan without the risk of
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* counter overflow. The price is lower resolution. You can also set counttime
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* using the module parameter. Note that the module parameter "prescaler" also
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* influences the behaviour. Unfortunately, there's no sysfs attribute
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* defined for that. See the data sheet for details.
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*/
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static ssize_t fan1_div_show(struct device *dev,
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struct device_attribute *devattr, char *buf)
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{
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struct max6650_data *data = max6650_update_device(dev);
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return sprintf(buf, "%d\n", DIV_FROM_REG(data->count));
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}
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static ssize_t fan1_div_store(struct device *dev,
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struct device_attribute *devattr,
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const char *buf, size_t count)
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{
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struct max6650_data *data = dev_get_drvdata(dev);
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struct i2c_client *client = data->client;
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unsigned long div;
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int err;
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err = kstrtoul(buf, 10, &div);
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if (err)
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return err;
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mutex_lock(&data->update_lock);
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switch (div) {
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case 1:
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data->count = 0;
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break;
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case 2:
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data->count = 1;
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break;
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case 4:
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data->count = 2;
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break;
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case 8:
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data->count = 3;
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break;
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default:
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mutex_unlock(&data->update_lock);
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return -EINVAL;
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}
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i2c_smbus_write_byte_data(client, MAX6650_REG_COUNT, data->count);
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mutex_unlock(&data->update_lock);
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return count;
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}
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/*
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* Get alarm stati:
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* Get gpio alarm status:
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* Possible values:
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* 0 = no alarm
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* 1 = alarm
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@ -524,17 +308,6 @@ static ssize_t alarm_show(struct device *dev,
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return sprintf(buf, "%d\n", alarm);
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}
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static SENSOR_DEVICE_ATTR_RO(fan1_input, fan, 0);
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static SENSOR_DEVICE_ATTR_RO(fan2_input, fan, 1);
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static SENSOR_DEVICE_ATTR_RO(fan3_input, fan, 2);
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static SENSOR_DEVICE_ATTR_RO(fan4_input, fan, 3);
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static DEVICE_ATTR_RW(fan1_target);
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static DEVICE_ATTR_RW(fan1_div);
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static DEVICE_ATTR_RW(pwm1_enable);
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static DEVICE_ATTR_RW(pwm1);
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static SENSOR_DEVICE_ATTR_RO(fan1_max_alarm, alarm, MAX6650_ALRM_MAX);
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static SENSOR_DEVICE_ATTR_RO(fan1_min_alarm, alarm, MAX6650_ALRM_MIN);
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static SENSOR_DEVICE_ATTR_RO(fan1_fault, alarm, MAX6650_ALRM_TACH);
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static SENSOR_DEVICE_ATTR_RO(gpio1_alarm, alarm, MAX6650_ALRM_GPIO1);
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static SENSOR_DEVICE_ATTR_RO(gpio2_alarm, alarm, MAX6650_ALRM_GPIO2);
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@ -550,11 +323,8 @@ static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
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*/
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devattr = container_of(a, struct device_attribute, attr);
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if (devattr == &sensor_dev_attr_fan1_max_alarm.dev_attr
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|| devattr == &sensor_dev_attr_fan1_min_alarm.dev_attr
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|| devattr == &sensor_dev_attr_fan1_fault.dev_attr
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|| devattr == &sensor_dev_attr_gpio1_alarm.dev_attr
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|| devattr == &sensor_dev_attr_gpio2_alarm.dev_attr) {
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if (devattr == &sensor_dev_attr_gpio1_alarm.dev_attr ||
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devattr == &sensor_dev_attr_gpio2_alarm.dev_attr) {
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if (!(data->alarm_en & to_sensor_dev_attr(devattr)->index))
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return 0;
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}
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@ -563,14 +333,6 @@ static umode_t max6650_attrs_visible(struct kobject *kobj, struct attribute *a,
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}
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static struct attribute *max6650_attrs[] = {
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&sensor_dev_attr_fan1_input.dev_attr.attr,
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&dev_attr_fan1_target.attr,
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&dev_attr_fan1_div.attr,
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&dev_attr_pwm1_enable.attr,
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&dev_attr_pwm1.attr,
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&sensor_dev_attr_fan1_max_alarm.dev_attr.attr,
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&sensor_dev_attr_fan1_min_alarm.dev_attr.attr,
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&sensor_dev_attr_fan1_fault.dev_attr.attr,
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&sensor_dev_attr_gpio1_alarm.dev_attr.attr,
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&sensor_dev_attr_gpio2_alarm.dev_attr.attr,
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NULL
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@ -581,21 +343,11 @@ static const struct attribute_group max6650_group = {
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.is_visible = max6650_attrs_visible,
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};
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static struct attribute *max6651_attrs[] = {
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&sensor_dev_attr_fan2_input.dev_attr.attr,
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&sensor_dev_attr_fan3_input.dev_attr.attr,
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&sensor_dev_attr_fan4_input.dev_attr.attr,
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static const struct attribute_group *max6650_groups[] = {
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&max6650_group,
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NULL
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};
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static const struct attribute_group max6651_group = {
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.attrs = max6651_attrs,
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};
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/*
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* Real code
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*/
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static int max6650_init_client(struct max6650_data *data,
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struct i2c_client *client)
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{
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@ -747,6 +499,244 @@ static const struct thermal_cooling_device_ops max6650_cooling_ops = {
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};
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#endif
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static int max6650_read(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long *val)
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{
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struct max6650_data *data = max6650_update_device(dev);
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int mode;
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switch (type) {
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case hwmon_pwm:
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switch (attr) {
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case hwmon_pwm_input:
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*val = dac_to_pwm(data->dac,
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data->config & MAX6650_CFG_V12);
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break;
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case hwmon_pwm_enable:
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/*
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* Possible values:
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* 0 = Fan always on
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* 1 = Open loop, Voltage is set according to speed,
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* not regulated.
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* 2 = Closed loop, RPM for all fans regulated by fan1
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* tachometer
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* 3 = Fan off
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*/
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mode = (data->config & MAX6650_CFG_MODE_MASK) >> 4;
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*val = (4 - mode) & 3; /* {0 1 2 3} -> {0 3 2 1} */
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break;
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default:
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return -EOPNOTSUPP;
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}
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break;
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case hwmon_fan:
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switch (attr) {
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case hwmon_fan_input:
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/*
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* Calculation details:
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*
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* Each tachometer counts over an interval given by the
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* "count" register (0.25, 0.5, 1 or 2 seconds).
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* The driver assumes that the fans produce two pulses
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* per revolution (this seems to be the most common).
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*/
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*val = DIV_ROUND_CLOSEST(data->tach[channel] * 120,
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DIV_FROM_REG(data->count));
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break;
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case hwmon_fan_div:
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*val = DIV_FROM_REG(data->count);
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break;
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case hwmon_fan_target:
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/*
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* Use the datasheet equation:
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* FanSpeed = KSCALE x fCLK / [256 x (KTACH + 1)]
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* then multiply by 60 to give rpm.
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*/
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*val = 60 * DIV_FROM_REG(data->config) * clock /
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(256 * (data->speed + 1));
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break;
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case hwmon_fan_min_alarm:
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*val = !!(data->alarm & MAX6650_ALRM_MIN);
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data->alarm &= ~MAX6650_ALRM_MIN;
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data->valid = false;
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break;
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case hwmon_fan_max_alarm:
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*val = !!(data->alarm & MAX6650_ALRM_MAX);
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data->alarm &= ~MAX6650_ALRM_MAX;
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data->valid = false;
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break;
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case hwmon_fan_fault:
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*val = !!(data->alarm & MAX6650_ALRM_TACH);
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data->alarm &= ~MAX6650_ALRM_TACH;
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data->valid = false;
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break;
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default:
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return -EOPNOTSUPP;
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}
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break;
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default:
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static const u8 max6650_pwm_modes[] = {
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MAX6650_CFG_MODE_ON,
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MAX6650_CFG_MODE_OPEN_LOOP,
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MAX6650_CFG_MODE_CLOSED_LOOP,
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MAX6650_CFG_MODE_OFF,
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};
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static int max6650_write(struct device *dev, enum hwmon_sensor_types type,
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u32 attr, int channel, long val)
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{
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struct max6650_data *data = dev_get_drvdata(dev);
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int ret = 0;
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u8 reg;
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mutex_lock(&data->update_lock);
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switch (type) {
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case hwmon_pwm:
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switch (attr) {
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case hwmon_pwm_input:
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reg = pwm_to_dac(clamp_val(val, 0, 255),
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data->config & MAX6650_CFG_V12);
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ret = i2c_smbus_write_byte_data(data->client,
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MAX6650_REG_DAC, reg);
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if (ret)
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break;
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data->dac = reg;
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break;
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case hwmon_pwm_enable:
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if (val < 0 || val >= ARRAY_SIZE(max6650_pwm_modes)) {
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ret = -EINVAL;
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break;
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}
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ret = max6650_set_operating_mode(data,
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max6650_pwm_modes[val]);
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break;
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default:
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ret = -EOPNOTSUPP;
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break;
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}
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break;
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case hwmon_fan:
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switch (attr) {
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case hwmon_fan_div:
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switch (val) {
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case 1:
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reg = 0;
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break;
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case 2:
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reg = 1;
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break;
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case 4:
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reg = 2;
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break;
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case 8:
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reg = 3;
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break;
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default:
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ret = -EINVAL;
|
||||
goto error;
|
||||
}
|
||||
ret = i2c_smbus_write_byte_data(data->client,
|
||||
MAX6650_REG_COUNT, reg);
|
||||
if (ret)
|
||||
break;
|
||||
data->count = reg;
|
||||
break;
|
||||
case hwmon_fan_target:
|
||||
if (val < 0) {
|
||||
ret = -EINVAL;
|
||||
break;
|
||||
}
|
||||
ret = max6650_set_target(data, val);
|
||||
break;
|
||||
default:
|
||||
ret = -EOPNOTSUPP;
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
ret = -EOPNOTSUPP;
|
||||
break;
|
||||
}
|
||||
|
||||
error:
|
||||
mutex_unlock(&data->update_lock);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static umode_t max6650_is_visible(const void *_data,
|
||||
enum hwmon_sensor_types type, u32 attr,
|
||||
int channel)
|
||||
{
|
||||
const struct max6650_data *data = _data;
|
||||
|
||||
if (channel && (channel >= data->nr_fans || type != hwmon_fan))
|
||||
return 0;
|
||||
|
||||
switch (type) {
|
||||
case hwmon_fan:
|
||||
switch (attr) {
|
||||
case hwmon_fan_input:
|
||||
return 0444;
|
||||
case hwmon_fan_target:
|
||||
case hwmon_fan_div:
|
||||
return 0644;
|
||||
case hwmon_fan_min_alarm:
|
||||
if (data->alarm_en & MAX6650_ALRM_MIN)
|
||||
return 0444;
|
||||
break;
|
||||
case hwmon_fan_max_alarm:
|
||||
if (data->alarm_en & MAX6650_ALRM_MAX)
|
||||
return 0444;
|
||||
break;
|
||||
case hwmon_fan_fault:
|
||||
if (data->alarm_en & MAX6650_ALRM_TACH)
|
||||
return 0444;
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
case hwmon_pwm:
|
||||
switch (attr) {
|
||||
case hwmon_pwm_input:
|
||||
case hwmon_pwm_enable:
|
||||
return 0644;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
break;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct hwmon_channel_info *max6650_info[] = {
|
||||
HWMON_CHANNEL_INFO(fan, HWMON_F_INPUT | HWMON_F_TARGET | HWMON_F_DIV |
|
||||
HWMON_F_MIN_ALARM | HWMON_F_MAX_ALARM |
|
||||
HWMON_F_FAULT,
|
||||
HWMON_F_INPUT, HWMON_F_INPUT, HWMON_F_INPUT),
|
||||
HWMON_CHANNEL_INFO(pwm, HWMON_PWM_INPUT | HWMON_PWM_ENABLE),
|
||||
NULL
|
||||
};
|
||||
|
||||
static const struct hwmon_ops max6650_hwmon_ops = {
|
||||
.read = max6650_read,
|
||||
.write = max6650_write,
|
||||
.is_visible = max6650_is_visible,
|
||||
};
|
||||
|
||||
static const struct hwmon_chip_info max6650_chip_info = {
|
||||
.ops = &max6650_hwmon_ops,
|
||||
.info = max6650_info,
|
||||
};
|
||||
|
||||
static int max6650_probe(struct i2c_client *client,
|
||||
const struct i2c_device_id *id)
|
||||
{
|
||||
|
|
@ -774,14 +764,10 @@ static int max6650_probe(struct i2c_client *client,
|
|||
if (err)
|
||||
return err;
|
||||
|
||||
data->groups[0] = &max6650_group;
|
||||
/* 3 additional fan inputs for the MAX6651 */
|
||||
if (data->nr_fans == 4)
|
||||
data->groups[1] = &max6651_group;
|
||||
|
||||
hwmon_dev = devm_hwmon_device_register_with_groups(dev,
|
||||
client->name, data,
|
||||
data->groups);
|
||||
hwmon_dev = devm_hwmon_device_register_with_info(dev,
|
||||
client->name, data,
|
||||
&max6650_chip_info,
|
||||
max6650_groups);
|
||||
err = PTR_ERR_OR_ZERO(hwmon_dev);
|
||||
if (err)
|
||||
return err;
|
||||
|
|
|
|||
Loading…
Reference in New Issue