/*
* w83l785ts.c - Part of lm_sensors, Linux kernel modules for hardware
* monitoring
- * Copyright (C) 2003-2004 Jean Delvare <khali@linux-fr.org>
+ * Copyright (C) 2003-2009 Jean Delvare <khali@linux-fr.org>
*
* Inspired from the lm83 driver. The W83L785TS-S is a sensor chip made
* by Winbond. It reports a single external temperature with a 1 deg
static const unsigned short normal_i2c[] = { 0x2e, I2C_CLIENT_END };
/*
- * Insmod parameters
- */
-
-I2C_CLIENT_INSMOD_1(w83l785ts);
-
-/*
* The W83L785TS-S registers
* Manufacturer ID is 0x5CA3 for Winbond.
*/
* Functions declaration
*/
-static int w83l785ts_attach_adapter(struct i2c_adapter *adapter);
-static int w83l785ts_detect(struct i2c_adapter *adapter, int address,
- int kind);
-static int w83l785ts_detach_client(struct i2c_client *client);
+static int w83l785ts_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int w83l785ts_detect(struct i2c_client *client,
+ struct i2c_board_info *info);
+static int w83l785ts_remove(struct i2c_client *client);
static u8 w83l785ts_read_value(struct i2c_client *client, u8 reg, u8 defval);
static struct w83l785ts_data *w83l785ts_update_device(struct device *dev);
* Driver data (common to all clients)
*/
+static const struct i2c_device_id w83l785ts_id[] = {
+ { "w83l785ts", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, w83l785ts_id);
+
static struct i2c_driver w83l785ts_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
.name = "w83l785ts",
},
- .attach_adapter = w83l785ts_attach_adapter,
- .detach_client = w83l785ts_detach_client,
+ .probe = w83l785ts_probe,
+ .remove = w83l785ts_remove,
+ .id_table = w83l785ts_id,
+ .detect = w83l785ts_detect,
+ .address_list = normal_i2c,
};
/*
*/
struct w83l785ts_data {
- struct i2c_client client;
struct device *hwmon_dev;
struct mutex update_lock;
char valid; /* zero until following fields are valid */
* Real code
*/
-static int w83l785ts_attach_adapter(struct i2c_adapter *adapter)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int w83l785ts_detect(struct i2c_client *client,
+ struct i2c_board_info *info)
{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, w83l785ts_detect);
+ struct i2c_adapter *adapter = client->adapter;
+ u16 man_id;
+ u8 chip_id;
+
+ if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
+ return -ENODEV;
+
+ /* detection */
+ if ((w83l785ts_read_value(client, W83L785TS_REG_CONFIG, 0) & 0x80)
+ || (w83l785ts_read_value(client, W83L785TS_REG_TYPE, 0) & 0xFC)) {
+ dev_dbg(&adapter->dev,
+ "W83L785TS-S detection failed at 0x%02x\n",
+ client->addr);
+ return -ENODEV;
+ }
+
+ /* Identification */
+ man_id = (w83l785ts_read_value(client, W83L785TS_REG_MAN_ID1, 0) << 8)
+ + w83l785ts_read_value(client, W83L785TS_REG_MAN_ID2, 0);
+ chip_id = w83l785ts_read_value(client, W83L785TS_REG_CHIP_ID, 0);
+
+ if (man_id != 0x5CA3 /* Winbond */
+ || chip_id != 0x70) { /* W83L785TS-S */
+ dev_dbg(&adapter->dev,
+ "Unsupported chip (man_id=0x%04X, chip_id=0x%02X)\n",
+ man_id, chip_id);
+ return -ENODEV;
+ }
+
+ strlcpy(info->type, "w83l785ts", I2C_NAME_SIZE);
+
+ return 0;
}
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int w83l785ts_detect(struct i2c_adapter *adapter, int address, int kind)
+static int w83l785ts_probe(struct i2c_client *new_client,
+ const struct i2c_device_id *id)
{
- struct i2c_client *new_client;
struct w83l785ts_data *data;
int err = 0;
-
- if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA))
- goto exit;
-
- if (!(data = kzalloc(sizeof(struct w83l785ts_data), GFP_KERNEL))) {
+ data = kzalloc(sizeof(struct w83l785ts_data), GFP_KERNEL);
+ if (!data) {
err = -ENOMEM;
goto exit;
}
- /* The common I2C client data is placed right before the
- * W83L785TS-specific data. */
- new_client = &data->client;
i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &w83l785ts_driver;
- new_client->flags = 0;
-
- /*
- * Now we do the remaining detection. A negative kind means that
- * the driver was loaded with no force parameter (default), so we
- * must both detect and identify the chip (actually there is only
- * one possible kind of chip for now, W83L785TS-S). A zero kind means
- * that the driver was loaded with the force parameter, the detection
- * step shall be skipped. A positive kind means that the driver
- * was loaded with the force parameter and a given kind of chip is
- * requested, so both the detection and the identification steps
- * are skipped.
- */
- if (kind < 0) { /* detection */
- if (((w83l785ts_read_value(new_client,
- W83L785TS_REG_CONFIG, 0) & 0x80) != 0x00)
- || ((w83l785ts_read_value(new_client,
- W83L785TS_REG_TYPE, 0) & 0xFC) != 0x00)) {
- dev_dbg(&adapter->dev,
- "W83L785TS-S detection failed at 0x%02x.\n",
- address);
- goto exit_free;
- }
- }
-
- if (kind <= 0) { /* identification */
- u16 man_id;
- u8 chip_id;
-
- man_id = (w83l785ts_read_value(new_client,
- W83L785TS_REG_MAN_ID1, 0) << 8) +
- w83l785ts_read_value(new_client,
- W83L785TS_REG_MAN_ID2, 0);
- chip_id = w83l785ts_read_value(new_client,
- W83L785TS_REG_CHIP_ID, 0);
-
- if (man_id == 0x5CA3) { /* Winbond */
- if (chip_id == 0x70) { /* W83L785TS-S */
- kind = w83l785ts;
- }
- }
-
- if (kind <= 0) { /* identification failed */
- dev_info(&adapter->dev,
- "Unsupported chip (man_id=0x%04X, "
- "chip_id=0x%02X).\n", man_id, chip_id);
- goto exit_free;
- }
- }
-
- /* We can fill in the remaining client fields. */
- strlcpy(new_client->name, "w83l785ts", I2C_NAME_SIZE);
data->valid = 0;
mutex_init(&data->update_lock);
/* Default values in case the first read fails (unlikely). */
data->temp[1] = data->temp[0] = 0;
- /* Tell the I2C layer a new client has arrived. */
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
-
/*
* Initialize the W83L785TS chip
* Nothing yet, assume it is already started.
&sensor_dev_attr_temp1_input.dev_attr);
device_remove_file(&new_client->dev,
&sensor_dev_attr_temp1_max.dev_attr);
- i2c_detach_client(new_client);
-exit_free:
kfree(data);
exit:
return err;
}
-static int w83l785ts_detach_client(struct i2c_client *client)
+static int w83l785ts_remove(struct i2c_client *client)
{
struct w83l785ts_data *data = i2c_get_clientdata(client);
- int err;
hwmon_device_unregister(data->hwmon_dev);
device_remove_file(&client->dev,
&sensor_dev_attr_temp1_input.dev_attr);
device_remove_file(&client->dev,
&sensor_dev_attr_temp1_max.dev_attr);
- if ((err = i2c_detach_client(client)))
- return err;
kfree(data);
return 0;
static u8 w83l785ts_read_value(struct i2c_client *client, u8 reg, u8 defval)
{
int value, i;
+ struct device *dev;
+ const char *prefix;
+
+ /* We might be called during detection, at which point the client
+ isn't yet fully initialized, so we can't use dev_dbg on it */
+ if (i2c_get_clientdata(client)) {
+ dev = &client->dev;
+ prefix = "";
+ } else {
+ dev = &client->adapter->dev;
+ prefix = "w83l785ts: ";
+ }
/* Frequent read errors have been reported on Asus boards, so we
* retry on read errors. If it still fails (unlikely), return the
for (i = 1; i <= MAX_RETRIES; i++) {
value = i2c_smbus_read_byte_data(client, reg);
if (value >= 0) {
- dev_dbg(&client->dev, "Read 0x%02x from register "
- "0x%02x.\n", value, reg);
+ dev_dbg(dev, "%sRead 0x%02x from register 0x%02x.\n",
+ prefix, value, reg);
return value;
}
- dev_dbg(&client->dev, "Read failed, will retry in %d.\n", i);
+ dev_dbg(dev, "%sRead failed, will retry in %d.\n", prefix, i);
msleep(i);
}
- dev_err(&client->dev, "Couldn't read value from register 0x%02x. "
- "Please report.\n", reg);
+ dev_err(dev, "%sCouldn't read value from register 0x%02x.\n", prefix,
+ reg);
return defval;
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff