diff options
Diffstat (limited to 'drivers/hwmon/amc6821.c')
| -rw-r--r-- | drivers/hwmon/amc6821.c | 397 |
1 files changed, 165 insertions, 232 deletions
diff --git a/drivers/hwmon/amc6821.c b/drivers/hwmon/amc6821.c index 9f2be3dd28f3..12e851a5af48 100644 --- a/drivers/hwmon/amc6821.c +++ b/drivers/hwmon/amc6821.c @@ -21,7 +21,6 @@ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ - #include <linux/kernel.h> /* Needed for KERN_INFO */ #include <linux/module.h> #include <linux/init.h> @@ -33,7 +32,6 @@ #include <linux/err.h> #include <linux/mutex.h> - /* * Addresses to scan. */ @@ -41,8 +39,6 @@ static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e, 0x4c, 0x4d, 0x4e, I2C_CLIENT_END}; - - /* * Insmod parameters */ @@ -53,7 +49,6 @@ module_param(pwminv, int, S_IRUGO); static int init = 1; /*Power-on initialization.*/ module_param(init, int, S_IRUGO); - enum chips { amc6821 }; #define AMC6821_REG_DEV_ID 0x3D @@ -152,46 +147,12 @@ static const u8 fan_reg_hi[] = {AMC6821_REG_TDATA_HI, AMC6821_REG_TACH_LLIMITH, AMC6821_REG_TACH_HLIMITH, }; -static int amc6821_probe( - struct i2c_client *client, - const struct i2c_device_id *id); -static int amc6821_detect( - struct i2c_client *client, - struct i2c_board_info *info); -static int amc6821_init_client(struct i2c_client *client); -static int amc6821_remove(struct i2c_client *client); -static struct amc6821_data *amc6821_update_device(struct device *dev); - -/* - * Driver data (common to all clients) - */ - -static const struct i2c_device_id amc6821_id[] = { - { "amc6821", amc6821 }, - { } -}; - -MODULE_DEVICE_TABLE(i2c, amc6821_id); - -static struct i2c_driver amc6821_driver = { - .class = I2C_CLASS_HWMON, - .driver = { - .name = "amc6821", - }, - .probe = amc6821_probe, - .remove = amc6821_remove, - .id_table = amc6821_id, - .detect = amc6821_detect, - .address_list = normal_i2c, -}; - - /* * Client data (each client gets its own) */ struct amc6821_data { - struct device *hwmon_dev; + struct i2c_client *client; struct mutex update_lock; char valid; /* zero until following fields are valid */ unsigned long last_updated; /* in jiffies */ @@ -213,6 +174,108 @@ struct amc6821_data { u8 stat2; }; +static struct amc6821_data *amc6821_update_device(struct device *dev) +{ + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; + int timeout = HZ; + u8 reg; + int i; + + mutex_lock(&data->update_lock); + + if (time_after(jiffies, data->last_updated + timeout) || + !data->valid) { + + for (i = 0; i < TEMP_IDX_LEN; i++) + data->temp[i] = i2c_smbus_read_byte_data(client, + temp_reg[i]); + + data->stat1 = i2c_smbus_read_byte_data(client, + AMC6821_REG_STAT1); + data->stat2 = i2c_smbus_read_byte_data(client, + AMC6821_REG_STAT2); + + data->pwm1 = i2c_smbus_read_byte_data(client, + AMC6821_REG_DCY); + for (i = 0; i < FAN1_IDX_LEN; i++) { + data->fan[i] = i2c_smbus_read_byte_data( + client, + fan_reg_low[i]); + data->fan[i] += i2c_smbus_read_byte_data( + client, + fan_reg_hi[i]) << 8; + } + data->fan1_div = i2c_smbus_read_byte_data(client, + AMC6821_REG_CONF4); + data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2; + + data->pwm1_auto_point_pwm[0] = 0; + data->pwm1_auto_point_pwm[2] = 255; + data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client, + AMC6821_REG_DCY_LOW_TEMP); + + data->temp1_auto_point_temp[0] = + i2c_smbus_read_byte_data(client, + AMC6821_REG_PSV_TEMP); + data->temp2_auto_point_temp[0] = + data->temp1_auto_point_temp[0]; + reg = i2c_smbus_read_byte_data(client, + AMC6821_REG_LTEMP_FAN_CTRL); + data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1; + reg &= 0x07; + reg = 0x20 >> reg; + if (reg > 0) + data->temp1_auto_point_temp[2] = + data->temp1_auto_point_temp[1] + + (data->pwm1_auto_point_pwm[2] - + data->pwm1_auto_point_pwm[1]) / reg; + else + data->temp1_auto_point_temp[2] = 255; + + reg = i2c_smbus_read_byte_data(client, + AMC6821_REG_RTEMP_FAN_CTRL); + data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1; + reg &= 0x07; + reg = 0x20 >> reg; + if (reg > 0) + data->temp2_auto_point_temp[2] = + data->temp2_auto_point_temp[1] + + (data->pwm1_auto_point_pwm[2] - + data->pwm1_auto_point_pwm[1]) / reg; + else + data->temp2_auto_point_temp[2] = 255; + + reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); + reg = (reg >> 5) & 0x3; + switch (reg) { + case 0: /*open loop: software sets pwm1*/ + data->pwm1_auto_channels_temp = 0; + data->pwm1_enable = 1; + break; + case 2: /*closed loop: remote T (temp2)*/ + data->pwm1_auto_channels_temp = 2; + data->pwm1_enable = 2; + break; + case 3: /*closed loop: local and remote T (temp2)*/ + data->pwm1_auto_channels_temp = 3; + data->pwm1_enable = 3; + break; + case 1: /* + * semi-open loop: software sets rpm, chip controls + * pwm1, currently not implemented + */ + data->pwm1_auto_channels_temp = 0; + data->pwm1_enable = 0; + break; + } + + data->last_updated = jiffies; + data->valid = 1; + } + mutex_unlock(&data->update_lock); + return data; +} static ssize_t get_temp( struct device *dev, @@ -225,16 +288,14 @@ static ssize_t get_temp( return sprintf(buf, "%d\n", data->temp[ix] * 1000); } - - static ssize_t set_temp( struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; int ix = to_sensor_dev_attr(attr)->index; long val; @@ -253,9 +314,6 @@ static ssize_t set_temp( return count; } - - - static ssize_t get_temp_alarm( struct device *dev, struct device_attribute *devattr, @@ -294,9 +352,6 @@ static ssize_t get_temp_alarm( return sprintf(buf, "0"); } - - - static ssize_t get_temp2_fault( struct device *dev, struct device_attribute *devattr, @@ -324,8 +379,8 @@ static ssize_t set_pwm1( const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; long val; int ret = kstrtol(buf, 10, &val); if (ret) @@ -353,18 +408,20 @@ static ssize_t set_pwm1_enable( const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; long val; int config = kstrtol(buf, 10, &val); if (config) return config; + mutex_lock(&data->update_lock); config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); - return config; + count = config; + goto unlock; } switch (val) { @@ -381,19 +438,19 @@ static ssize_t set_pwm1_enable( config |= AMC6821_CONF1_FDRC1; break; default: - return -EINVAL; + count = -EINVAL; + goto unlock; } - mutex_lock(&data->update_lock); if (i2c_smbus_write_byte_data(client, AMC6821_REG_CONF1, config)) { dev_err(&client->dev, "Configuration register write error, aborting.\n"); count = -EIO; } +unlock: mutex_unlock(&data->update_lock); return count; } - static ssize_t get_pwm1_auto_channels_temp( struct device *dev, struct device_attribute *devattr, @@ -403,7 +460,6 @@ static ssize_t get_pwm1_auto_channels_temp( return sprintf(buf, "%d\n", data->pwm1_auto_channels_temp); } - static ssize_t get_temp_auto_point_temp( struct device *dev, struct device_attribute *devattr, @@ -425,7 +481,6 @@ static ssize_t get_temp_auto_point_temp( } } - static ssize_t get_pwm1_auto_point_pwm( struct device *dev, struct device_attribute *devattr, @@ -436,7 +491,6 @@ static ssize_t get_pwm1_auto_point_pwm( return sprintf(buf, "%d\n", data->pwm1_auto_point_pwm[ix]); } - static inline ssize_t set_slope_register(struct i2c_client *client, u8 reg, u8 dpwm, @@ -459,16 +513,14 @@ static inline ssize_t set_slope_register(struct i2c_client *client, return 0; } - - static ssize_t set_temp_auto_point_temp( struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); struct amc6821_data *data = amc6821_update_device(dev); + struct i2c_client *client = data->client; int ix = to_sensor_dev_attr_2(attr)->index; int nr = to_sensor_dev_attr_2(attr)->nr; u8 *ptemp; @@ -493,8 +545,9 @@ static ssize_t set_temp_auto_point_temp( return -EINVAL; } - data->valid = 0; mutex_lock(&data->update_lock); + data->valid = 0; + switch (ix) { case 0: ptemp[0] = clamp_val(val / 1000, 0, @@ -533,16 +586,14 @@ EXIT: return count; } - - static ssize_t set_pwm1_auto_point_pwm( struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; int dpwm; long val; int ret = kstrtol(buf, 10, &val); @@ -587,8 +638,6 @@ static ssize_t get_fan( return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix])); } - - static ssize_t get_fan1_fault( struct device *dev, struct device_attribute *devattr, @@ -601,15 +650,13 @@ static ssize_t get_fan1_fault( return sprintf(buf, "0"); } - - static ssize_t set_fan( struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; long val; int ix = to_sensor_dev_attr(attr)->index; int ret = kstrtol(buf, 10, &val); @@ -635,8 +682,6 @@ EXIT: return count; } - - static ssize_t get_fan1_div( struct device *dev, struct device_attribute *devattr, @@ -651,20 +696,21 @@ static ssize_t set_fan1_div( struct device_attribute *attr, const char *buf, size_t count) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); + struct amc6821_data *data = dev_get_drvdata(dev); + struct i2c_client *client = data->client; long val; int config = kstrtol(buf, 10, &val); if (config) return config; + mutex_lock(&data->update_lock); config = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF4); if (config < 0) { dev_err(&client->dev, "Error reading configuration register, aborting.\n"); - return config; + count = config; + goto EXIT; } - mutex_lock(&data->update_lock); switch (val) { case 2: config &= ~AMC6821_CONF4_PSPR; @@ -688,8 +734,6 @@ EXIT: return count; } - - static SENSOR_DEVICE_ATTR(temp1_input, S_IRUGO, get_temp, NULL, IDX_TEMP1_INPUT); static SENSOR_DEVICE_ATTR(temp1_min, S_IRUGO | S_IWUSR, get_temp, @@ -754,8 +798,6 @@ static SENSOR_DEVICE_ATTR_2(temp2_auto_point2_temp, S_IWUSR | S_IRUGO, static SENSOR_DEVICE_ATTR_2(temp2_auto_point3_temp, S_IWUSR | S_IRUGO, get_temp_auto_point_temp, set_temp_auto_point_temp, 2, 2); - - static struct attribute *amc6821_attrs[] = { &sensor_dev_attr_temp1_input.dev_attr.attr, &sensor_dev_attr_temp1_min.dev_attr.attr, @@ -792,11 +834,7 @@ static struct attribute *amc6821_attrs[] = { NULL }; -static struct attribute_group amc6821_attr_grp = { - .attrs = amc6821_attrs, -}; - - +ATTRIBUTE_GROUPS(amc6821); /* Return 0 if detection is successful, -ENODEV otherwise */ static int amc6821_detect( @@ -844,53 +882,6 @@ static int amc6821_detect( return 0; } -static int amc6821_probe( - struct i2c_client *client, - const struct i2c_device_id *id) -{ - struct amc6821_data *data; - int err; - - data = devm_kzalloc(&client->dev, sizeof(struct amc6821_data), - GFP_KERNEL); - if (!data) - return -ENOMEM; - - i2c_set_clientdata(client, data); - mutex_init(&data->update_lock); - - /* - * Initialize the amc6821 chip - */ - err = amc6821_init_client(client); - if (err) - return err; - - err = sysfs_create_group(&client->dev.kobj, &amc6821_attr_grp); - if (err) - return err; - - data->hwmon_dev = hwmon_device_register(&client->dev); - if (!IS_ERR(data->hwmon_dev)) - return 0; - - err = PTR_ERR(data->hwmon_dev); - dev_err(&client->dev, "error registering hwmon device.\n"); - sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp); - return err; -} - -static int amc6821_remove(struct i2c_client *client) -{ - struct amc6821_data *data = i2c_get_clientdata(client); - - hwmon_device_unregister(data->hwmon_dev); - sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp); - - return 0; -} - - static int amc6821_init_client(struct i2c_client *client) { int config; @@ -977,109 +968,51 @@ static int amc6821_init_client(struct i2c_client *client) return 0; } - -static struct amc6821_data *amc6821_update_device(struct device *dev) +static int amc6821_probe(struct i2c_client *client, + const struct i2c_device_id *id) { - struct i2c_client *client = to_i2c_client(dev); - struct amc6821_data *data = i2c_get_clientdata(client); - int timeout = HZ; - u8 reg; - int i; - - mutex_lock(&data->update_lock); - - if (time_after(jiffies, data->last_updated + timeout) || - !data->valid) { - - for (i = 0; i < TEMP_IDX_LEN; i++) - data->temp[i] = i2c_smbus_read_byte_data(client, - temp_reg[i]); + struct device *dev = &client->dev; + struct amc6821_data *data; + struct device *hwmon_dev; + int err; - data->stat1 = i2c_smbus_read_byte_data(client, - AMC6821_REG_STAT1); - data->stat2 = i2c_smbus_read_byte_data(client, - AMC6821_REG_STAT2); + data = devm_kzalloc(dev, sizeof(struct amc6821_data), GFP_KERNEL); + if (!data) + return -ENOMEM; - data->pwm1 = i2c_smbus_read_byte_data(client, - AMC6821_REG_DCY); - for (i = 0; i < FAN1_IDX_LEN; i++) { - data->fan[i] = i2c_smbus_read_byte_data( - client, - fan_reg_low[i]); - data->fan[i] += i2c_smbus_read_byte_data( - client, - fan_reg_hi[i]) << 8; - } - data->fan1_div = i2c_smbus_read_byte_data(client, - AMC6821_REG_CONF4); - data->fan1_div = data->fan1_div & AMC6821_CONF4_PSPR ? 4 : 2; + data->client = client; + mutex_init(&data->update_lock); - data->pwm1_auto_point_pwm[0] = 0; - data->pwm1_auto_point_pwm[2] = 255; - data->pwm1_auto_point_pwm[1] = i2c_smbus_read_byte_data(client, - AMC6821_REG_DCY_LOW_TEMP); + /* + * Initialize the amc6821 chip + */ + err = amc6821_init_client(client); + if (err) + return err; - data->temp1_auto_point_temp[0] = - i2c_smbus_read_byte_data(client, - AMC6821_REG_PSV_TEMP); - data->temp2_auto_point_temp[0] = - data->temp1_auto_point_temp[0]; - reg = i2c_smbus_read_byte_data(client, - AMC6821_REG_LTEMP_FAN_CTRL); - data->temp1_auto_point_temp[1] = (reg & 0xF8) >> 1; - reg &= 0x07; - reg = 0x20 >> reg; - if (reg > 0) - data->temp1_auto_point_temp[2] = - data->temp1_auto_point_temp[1] + - (data->pwm1_auto_point_pwm[2] - - data->pwm1_auto_point_pwm[1]) / reg; - else - data->temp1_auto_point_temp[2] = 255; + hwmon_dev = devm_hwmon_device_register_with_groups(dev, client->name, + data, + amc6821_groups); + return PTR_ERR_OR_ZERO(hwmon_dev); +} - reg = i2c_smbus_read_byte_data(client, - AMC6821_REG_RTEMP_FAN_CTRL); - data->temp2_auto_point_temp[1] = (reg & 0xF8) >> 1; - reg &= 0x07; - reg = 0x20 >> reg; - if (reg > 0) - data->temp2_auto_point_temp[2] = - data->temp2_auto_point_temp[1] + - (data->pwm1_auto_point_pwm[2] - - data->pwm1_auto_point_pwm[1]) / reg; - else - data->temp2_auto_point_temp[2] = 255; +static const struct i2c_device_id amc6821_id[] = { + { "amc6821", amc6821 }, + { } +}; - reg = i2c_smbus_read_byte_data(client, AMC6821_REG_CONF1); - reg = (reg >> 5) & 0x3; - switch (reg) { - case 0: /*open loop: software sets pwm1*/ - data->pwm1_auto_channels_temp = 0; - data->pwm1_enable = 1; - break; - case 2: /*closed loop: remote T (temp2)*/ - data->pwm1_auto_channels_temp = 2; - data->pwm1_enable = 2; - break; - case 3: /*closed loop: local and remote T (temp2)*/ - data->pwm1_auto_channels_temp = 3; - data->pwm1_enable = 3; - break; - case 1: /* - * semi-open loop: software sets rpm, chip controls - * pwm1, currently not implemented - */ - data->pwm1_auto_channels_temp = 0; - data->pwm1_enable = 0; - break; - } +MODULE_DEVICE_TABLE(i2c, amc6821_id); - data->last_updated = jiffies; - data->valid = 1; - } - mutex_unlock(&data->update_lock); - return data; -} +static struct i2c_driver amc6821_driver = { + .class = I2C_CLASS_HWMON, + .driver = { + .name = "amc6821", + }, + .probe = amc6821_probe, + .id_table = amc6821_id, + .detect = amc6821_detect, + .address_list = normal_i2c, +}; module_i2c_driver(amc6821_driver); |