* 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>
#include <linux/err.h>
#include <linux/mutex.h>
-
/*
* Addresses to scan.
*/
static const unsigned short normal_i2c[] = {0x18, 0x19, 0x1a, 0x2c, 0x2d, 0x2e,
0x4c, 0x4d, 0x4e, I2C_CLIENT_END};
-
-
/*
* Insmod parameters
*/
static int init = 1; /*Power-on initialization.*/
module_param(init, int, S_IRUGO);
-
enum chips { amc6821 };
#define AMC6821_REG_DEV_ID 0x3D
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)
*/
u8 stat2;
};
+static struct amc6821_data *amc6821_update_device(struct device *dev)
+{
+ 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]);
+
+ 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,
return sprintf(buf, "%d\n", data->temp[ix] * 1000);
}
-
-
static ssize_t set_temp(
struct device *dev,
struct device_attribute *attr,
return count;
}
-
-
-
static ssize_t get_temp_alarm(
struct device *dev,
struct device_attribute *devattr,
return sprintf(buf, "0");
}
-
-
-
static ssize_t get_temp2_fault(
struct device *dev,
struct device_attribute *devattr,
return count;
}
-
static ssize_t get_pwm1_auto_channels_temp(
struct device *dev,
struct device_attribute *devattr,
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,
}
}
-
static ssize_t get_pwm1_auto_point_pwm(
struct device *dev,
struct device_attribute *devattr,
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,
return 0;
}
-
-
static ssize_t set_temp_auto_point_temp(
struct device *dev,
struct device_attribute *attr,
return count;
}
-
-
static ssize_t set_pwm1_auto_point_pwm(
struct device *dev,
struct device_attribute *attr,
return sprintf(buf, "%d\n", (int)(6000000 / data->fan[ix]));
}
-
-
static ssize_t get_fan1_fault(
struct device *dev,
struct device_attribute *devattr,
return sprintf(buf, "0");
}
-
-
static ssize_t set_fan(
struct device *dev,
struct device_attribute *attr,
return count;
}
-
-
static ssize_t get_fan1_div(
struct device *dev,
struct device_attribute *devattr,
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,
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,
.attrs = amc6821_attrs,
};
-
-
/* Return 0 if detection is successful, -ENODEV otherwise */
static int amc6821_detect(
struct i2c_client *client,
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;
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);
+ struct amc6821_data *data;
+ int err;
- if (time_after(jiffies, data->last_updated + timeout) ||
- !data->valid) {
+ data = devm_kzalloc(&client->dev, sizeof(struct amc6821_data),
+ GFP_KERNEL);
+ if (!data)
+ return -ENOMEM;
- for (i = 0; i < TEMP_IDX_LEN; i++)
- data->temp[i] = i2c_smbus_read_byte_data(client,
- temp_reg[i]);
+ i2c_set_clientdata(client, data);
+ mutex_init(&data->update_lock);
- data->stat1 = i2c_smbus_read_byte_data(client,
- AMC6821_REG_STAT1);
- data->stat2 = i2c_smbus_read_byte_data(client,
- AMC6821_REG_STAT2);
+ /*
+ * Initialize the amc6821 chip
+ */
+ err = amc6821_init_client(client);
+ if (err)
+ return err;
- 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;
+ err = sysfs_create_group(&client->dev.kobj, &amc6821_attr_grp);
+ if (err)
+ return err;
- 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->hwmon_dev = hwmon_device_register(&client->dev);
+ if (!IS_ERR(data->hwmon_dev))
+ return 0;
- 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;
+ 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;
+}
- 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 int amc6821_remove(struct i2c_client *client)
+{
+ struct amc6821_data *data = i2c_get_clientdata(client);
- 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;
- }
+ hwmon_device_unregister(data->hwmon_dev);
+ sysfs_remove_group(&client->dev.kobj, &amc6821_attr_grp);
- data->last_updated = jiffies;
- data->valid = 1;
- }
- mutex_unlock(&data->update_lock);
- return data;
+ return 0;
}
+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,
+};
+
module_i2c_driver(amc6821_driver);
MODULE_LICENSE("GPL");
projects / platform / kernel / linux-rpi.git / commitdiff