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path: root/drivers/w1/masters/ds2482.c
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Diffstat (limited to 'drivers/w1/masters/ds2482.c')
-rw-r--r--drivers/w1/masters/ds2482.c104
1 files changed, 44 insertions, 60 deletions
diff --git a/drivers/w1/masters/ds2482.c b/drivers/w1/masters/ds2482.c
index 0fd5820d5c6..df52cb355f7 100644
--- a/drivers/w1/masters/ds2482.c
+++ b/drivers/w1/masters/ds2482.c
@@ -94,21 +94,31 @@ static const u8 ds2482_chan_rd[8] =
#define DS2482_REG_STS_1WB 0x01
-static int ds2482_attach_adapter(struct i2c_adapter *adapter);
-static int ds2482_detect(struct i2c_adapter *adapter, int address, int kind);
-static int ds2482_detach_client(struct i2c_client *client);
+static int ds2482_probe(struct i2c_client *client,
+ const struct i2c_device_id *id);
+static int ds2482_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info);
+static int ds2482_remove(struct i2c_client *client);
/**
* Driver data (common to all clients)
*/
+static const struct i2c_device_id ds2482_id[] = {
+ { "ds2482", 0 },
+ { }
+};
+
static struct i2c_driver ds2482_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "ds2482",
},
- .attach_adapter = ds2482_attach_adapter,
- .detach_client = ds2482_detach_client,
+ .probe = ds2482_probe,
+ .remove = ds2482_remove,
+ .id_table = ds2482_id,
+ .detect = ds2482_detect,
+ .address_data = &addr_data,
};
/*
@@ -124,7 +134,7 @@ struct ds2482_w1_chan {
};
struct ds2482_data {
- struct i2c_client client;
+ struct i2c_client *client;
struct mutex access_lock;
/* 1-wire interface(s) */
@@ -147,7 +157,7 @@ struct ds2482_data {
static inline int ds2482_select_register(struct ds2482_data *pdev, u8 read_ptr)
{
if (pdev->read_prt != read_ptr) {
- if (i2c_smbus_write_byte_data(&pdev->client,
+ if (i2c_smbus_write_byte_data(pdev->client,
DS2482_CMD_SET_READ_PTR,
read_ptr) < 0)
return -1;
@@ -167,7 +177,7 @@ static inline int ds2482_select_register(struct ds2482_data *pdev, u8 read_ptr)
*/
static inline int ds2482_send_cmd(struct ds2482_data *pdev, u8 cmd)
{
- if (i2c_smbus_write_byte(&pdev->client, cmd) < 0)
+ if (i2c_smbus_write_byte(pdev->client, cmd) < 0)
return -1;
pdev->read_prt = DS2482_PTR_CODE_STATUS;
@@ -187,7 +197,7 @@ static inline int ds2482_send_cmd(struct ds2482_data *pdev, u8 cmd)
static inline int ds2482_send_cmd_data(struct ds2482_data *pdev,
u8 cmd, u8 byte)
{
- if (i2c_smbus_write_byte_data(&pdev->client, cmd, byte) < 0)
+ if (i2c_smbus_write_byte_data(pdev->client, cmd, byte) < 0)
return -1;
/* all cmds leave in STATUS, except CONFIG */
@@ -216,7 +226,7 @@ static int ds2482_wait_1wire_idle(struct ds2482_data *pdev)
if (!ds2482_select_register(pdev, DS2482_PTR_CODE_STATUS)) {
do {
- temp = i2c_smbus_read_byte(&pdev->client);
+ temp = i2c_smbus_read_byte(pdev->client);
} while ((temp >= 0) && (temp & DS2482_REG_STS_1WB) &&
(++retries < DS2482_WAIT_IDLE_TIMEOUT));
}
@@ -238,13 +248,13 @@ static int ds2482_wait_1wire_idle(struct ds2482_data *pdev)
*/
static int ds2482_set_channel(struct ds2482_data *pdev, u8 channel)
{
- if (i2c_smbus_write_byte_data(&pdev->client, DS2482_CMD_CHANNEL_SELECT,
+ if (i2c_smbus_write_byte_data(pdev->client, DS2482_CMD_CHANNEL_SELECT,
ds2482_chan_wr[channel]) < 0)
return -1;
pdev->read_prt = DS2482_PTR_CODE_CHANNEL;
pdev->channel = -1;
- if (i2c_smbus_read_byte(&pdev->client) == ds2482_chan_rd[channel]) {
+ if (i2c_smbus_read_byte(pdev->client) == ds2482_chan_rd[channel]) {
pdev->channel = channel;
return 0;
}
@@ -368,7 +378,7 @@ static u8 ds2482_w1_read_byte(void *data)
ds2482_select_register(pdev, DS2482_PTR_CODE_DATA);
/* Read the data byte */
- result = i2c_smbus_read_byte(&pdev->client);
+ result = i2c_smbus_read_byte(pdev->client);
mutex_unlock(&pdev->access_lock);
@@ -415,47 +425,38 @@ static u8 ds2482_w1_reset_bus(void *data)
}
-/**
- * Called to see if the device exists on an i2c bus.
- */
-static int ds2482_attach_adapter(struct i2c_adapter *adapter)
+static int ds2482_detect(struct i2c_client *client, int kind,
+ struct i2c_board_info *info)
{
- return i2c_probe(adapter, &addr_data, ds2482_detect);
-}
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_WRITE_BYTE_DATA |
+ I2C_FUNC_SMBUS_BYTE))
+ return -ENODEV;
+ strlcpy(info->type, "ds2482", I2C_NAME_SIZE);
-/*
- * The following function does more than just detection. If detection
- * succeeds, it also registers the new chip.
- */
-static int ds2482_detect(struct i2c_adapter *adapter, int address, int kind)
+ return 0;
+}
+
+static int ds2482_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
{
struct ds2482_data *data;
- struct i2c_client *new_client;
- int err = 0;
+ int err = -ENODEV;
int temp1;
int idx;
- if (!i2c_check_functionality(adapter,
- I2C_FUNC_SMBUS_WRITE_BYTE_DATA |
- I2C_FUNC_SMBUS_BYTE))
- goto exit;
-
if (!(data = kzalloc(sizeof(struct ds2482_data), GFP_KERNEL))) {
err = -ENOMEM;
goto exit;
}
- new_client = &data->client;
- i2c_set_clientdata(new_client, data);
- new_client->addr = address;
- new_client->driver = &ds2482_driver;
- new_client->adapter = adapter;
+ data->client = client;
+ i2c_set_clientdata(client, data);
/* Reset the device (sets the read_ptr to status) */
if (ds2482_send_cmd(data, DS2482_CMD_RESET) < 0) {
- dev_dbg(&adapter->dev, "DS2482 reset failed at 0x%02x.\n",
- address);
+ dev_warn(&client->dev, "DS2482 reset failed.\n");
goto exit_free;
}
@@ -463,10 +464,10 @@ static int ds2482_detect(struct i2c_adapter *adapter, int address, int kind)
ndelay(525);
/* Read the status byte - only reset bit and line should be set */
- temp1 = i2c_smbus_read_byte(new_client);
+ temp1 = i2c_smbus_read_byte(client);
if (temp1 != (DS2482_REG_STS_LL | DS2482_REG_STS_RST)) {
- dev_dbg(&adapter->dev, "DS2482 (0x%02x) reset status "
- "0x%02X - not a DS2482\n", address, temp1);
+ dev_warn(&client->dev, "DS2482 reset status "
+ "0x%02X - not a DS2482\n", temp1);
goto exit_free;
}
@@ -478,16 +479,8 @@ static int ds2482_detect(struct i2c_adapter *adapter, int address, int kind)
/* Set all config items to 0 (off) */
ds2482_send_cmd_data(data, DS2482_CMD_WRITE_CONFIG, 0xF0);
- /* We can fill in the remaining client fields */
- snprintf(new_client->name, sizeof(new_client->name), "ds2482-%d00",
- data->w1_count);
-
mutex_init(&data->access_lock);
- /* Tell the I2C layer a new client has arrived */
- if ((err = i2c_attach_client(new_client)))
- goto exit_free;
-
/* Register 1-wire interface(s) */
for (idx = 0; idx < data->w1_count; idx++) {
data->w1_ch[idx].pdev = data;
@@ -511,8 +504,6 @@ static int ds2482_detect(struct i2c_adapter *adapter, int address, int kind)
return 0;
exit_w1_remove:
- i2c_detach_client(new_client);
-
for (idx = 0; idx < data->w1_count; idx++) {
if (data->w1_ch[idx].pdev != NULL)
w1_remove_master_device(&data->w1_ch[idx].w1_bm);
@@ -523,10 +514,10 @@ exit:
return err;
}
-static int ds2482_detach_client(struct i2c_client *client)
+static int ds2482_remove(struct i2c_client *client)
{
struct ds2482_data *data = i2c_get_clientdata(client);
- int err, idx;
+ int idx;
/* Unregister the 1-wire bridge(s) */
for (idx = 0; idx < data->w1_count; idx++) {
@@ -534,13 +525,6 @@ static int ds2482_detach_client(struct i2c_client *client)
w1_remove_master_device(&data->w1_ch[idx].w1_bm);
}
- /* Detach the i2c device */
- if ((err = i2c_detach_client(client))) {
- dev_err(&client->dev,
- "Deregistration failed, client not detached.\n");
- return err;
- }
-
/* Free the memory */
kfree(data);
return 0;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-25 05:53:22 +0000