diff --git a/drivers/hwmon/lm75.c b/drivers/hwmon/lm75.c
index 7880c273c2c5..8f9595f2fb53 100644
--- a/drivers/hwmon/lm75.c
+++ b/drivers/hwmon/lm75.c
@@ -54,11 +54,11 @@ enum lm75_type { /* keep sorted in alphabetical order */
tmp75,
};
-/* Addresses scanned by legacy style driver binding */
+/* Addresses scanned */
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
-/* Insmod parameters (only for legacy style driver binding) */
+/* Insmod parameters */
I2C_CLIENT_INSMOD_1(lm75);
@@ -72,7 +72,6 @@ static const u8 LM75_REG_TEMP[3] = {
/* Each client has this additional data */
struct lm75_data {
- struct i2c_client *client;
struct device *hwmon_dev;
struct mutex update_lock;
u8 orig_conf;
@@ -138,7 +137,7 @@ static const struct attribute_group lm75_group = {
/*-----------------------------------------------------------------------*/
-/* "New style" I2C driver binding -- following the driver model */
+/* device probe and removal */
static int
lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
@@ -157,8 +156,6 @@ lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
return -ENOMEM;
i2c_set_clientdata(client, data);
-
- data->client = client;
mutex_init(&data->update_lock);
/* Set to LM75 resolution (9 bits, 1/2 degree C) and range.
@@ -236,45 +233,16 @@ static const struct i2c_device_id lm75_ids[] = {
};
MODULE_DEVICE_TABLE(i2c, lm75_ids);
-static struct i2c_driver lm75_driver = {
- .driver = {
- .name = "lm75",
- },
- .probe = lm75_probe,
- .remove = lm75_remove,
- .id_table = lm75_ids,
-};
-
-/*-----------------------------------------------------------------------*/
-
-/* "Legacy" I2C driver binding */
-
-static struct i2c_driver lm75_legacy_driver;
-
-/* This function is called by i2c_probe */
-static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
+/* Return 0 if detection is successful, -ENODEV otherwise */
+static int lm75_detect(struct i2c_client *new_client, int kind,
+ struct i2c_board_info *info)
{
+ struct i2c_adapter *adapter = new_client->adapter;
int i;
- struct i2c_client *new_client;
- int err = 0;
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
I2C_FUNC_SMBUS_WORD_DATA))
- goto exit;
-
- /* OK. For now, we presume we have a valid address. We create the
- client structure, even though there may be no sensor present.
- But it allows us to use i2c_smbus_read_*_data() calls. */
- new_client = kzalloc(sizeof *new_client, GFP_KERNEL);
- if (!new_client) {
- err = -ENOMEM;
- goto exit;
- }
-
- new_client->addr = address;
- new_client->adapter = adapter;
- new_client->driver = &lm75_legacy_driver;
- new_client->flags = 0;
+ return -ENODEV;
/* Now, we do the remaining detection. There is no identification-
dedicated register so we have to rely on several tricks:
@@ -294,71 +262,44 @@ static int lm75_detect(struct i2c_adapter *adapter, int address, int kind)
|| i2c_smbus_read_word_data(new_client, 5) != hyst
|| i2c_smbus_read_word_data(new_client, 6) != hyst
|| i2c_smbus_read_word_data(new_client, 7) != hyst)
- goto exit_free;
+ return -ENODEV;
os = i2c_smbus_read_word_data(new_client, 3);
if (i2c_smbus_read_word_data(new_client, 4) != os
|| i2c_smbus_read_word_data(new_client, 5) != os
|| i2c_smbus_read_word_data(new_client, 6) != os
|| i2c_smbus_read_word_data(new_client, 7) != os)
- goto exit_free;
+ return -ENODEV;
/* Unused bits */
if (conf & 0xe0)
- goto exit_free;
+ return -ENODEV;
/* Addresses cycling */
for (i = 8; i < 0xff; i += 8)
if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
|| i2c_smbus_read_word_data(new_client, i + 2) != hyst
|| i2c_smbus_read_word_data(new_client, i + 3) != os)
- goto exit_free;
+ return -ENODEV;
}
/* NOTE: we treat "force=..." and "force_lm75=..." the same.
* Only new-style driver binding distinguishes chip types.
*/
- strlcpy(new_client->name, "lm75", I2C_NAME_SIZE);
-
- /* Tell the I2C layer a new client has arrived */
- err = i2c_attach_client(new_client);
- if (err)
- goto exit_free;
-
- err = lm75_probe(new_client, NULL);
- if (err < 0)
- goto exit_detach;
+ strlcpy(info->type, "lm75", I2C_NAME_SIZE);
return 0;
-
-exit_detach:
- i2c_detach_client(new_client);
-exit_free:
- kfree(new_client);
-exit:
- return err;
}
-static int lm75_attach_adapter(struct i2c_adapter *adapter)
-{
- if (!(adapter->class & I2C_CLASS_HWMON))
- return 0;
- return i2c_probe(adapter, &addr_data, lm75_detect);
-}
-
-static int lm75_detach_client(struct i2c_client *client)
-{
- lm75_remove(client);
- i2c_detach_client(client);
- kfree(client);
- return 0;
-}
-
-static struct i2c_driver lm75_legacy_driver = {
+static struct i2c_driver lm75_driver = {
+ .class = I2C_CLASS_HWMON,
.driver = {
- .name = "lm75_legacy",
+ .name = "lm75",
},
- .attach_adapter = lm75_attach_adapter,
- .detach_client = lm75_detach_client,
+ .probe = lm75_probe,
+ .remove = lm75_remove,
+ .id_table = lm75_ids,
+ .detect = lm75_detect,
+ .address_data = &addr_data,
};
/*-----------------------------------------------------------------------*/
@@ -424,22 +365,11 @@ static struct lm75_data *lm75_update_device(struct device *dev)
static int __init sensors_lm75_init(void)
{
- int status;
-
- status = i2c_add_driver(&lm75_driver);
- if (status < 0)
- return status;
-
- status = i2c_add_driver(&lm75_legacy_driver);
- if (status < 0)
- i2c_del_driver(&lm75_driver);
-
- return status;
+ return i2c_add_driver(&lm75_driver);
}
static void __exit sensors_lm75_exit(void)
{
- i2c_del_driver(&lm75_legacy_driver);
i2c_del_driver(&lm75_driver);
}
diff --git a/drivers/i2c/Kconfig b/drivers/i2c/Kconfig
index 96867347bcbf..711ca08ab776 100644
--- a/drivers/i2c/Kconfig
+++ b/drivers/i2c/Kconfig
@@ -38,6 +38,20 @@ config I2C_CHARDEV
This support is also available as a module. If so, the module
will be called i2c-dev.
+config I2C_HELPER_AUTO
+ bool "Autoselect pertinent helper modules"
+ default y
+ help
+ Some I2C bus drivers require so-called "I2C algorithm" modules
+ to work. These are basically software-only abstractions of generic
+ I2C interfaces. This option will autoselect them so that you don't
+ have to care.
+
+ Unselect this only if you need to enable additional helper
+ modules, for example for use with external I2C bus drivers.
+
+ In doubt, say Y.
+
source drivers/i2c/algos/Kconfig
source drivers/i2c/busses/Kconfig
source drivers/i2c/chips/Kconfig
diff --git a/drivers/i2c/algos/Kconfig b/drivers/i2c/algos/Kconfig
index 7137a17402fe..b788579b8227 100644
--- a/drivers/i2c/algos/Kconfig
+++ b/drivers/i2c/algos/Kconfig
@@ -2,15 +2,20 @@
# I2C algorithm drivers configuration
#
+menu "I2C Algorithms"
+ depends on !I2C_HELPER_AUTO
+
config I2C_ALGOBIT
- tristate
+ tristate "I2C bit-banging interfaces"
config I2C_ALGOPCF
- tristate
+ tristate "I2C PCF 8584 interfaces"
config I2C_ALGOPCA
- tristate
+ tristate "I2C PCA 9564 interfaces"
config I2C_ALGO_SGI
tristate
depends on SGI_IP22 || SGI_IP32 || X86_VISWS
+
+endmenu
diff --git a/drivers/i2c/busses/i2c-amd756-s4882.c b/drivers/i2c/busses/i2c-amd756-s4882.c
index 72872d1e63ef..8ba2bcf727d3 100644
--- a/drivers/i2c/busses/i2c-amd756-s4882.c
+++ b/drivers/i2c/busses/i2c-amd756-s4882.c
@@ -155,6 +155,9 @@ static int __init amd756_s4882_init(void)
int i, error;
union i2c_smbus_data ioconfig;
+ if (!amd756_smbus.dev.parent)
+ return -ENODEV;
+
/* Configure the PCA9556 multiplexer */
ioconfig.byte = 0x00; /* All I/O to output mode */
error = i2c_smbus_xfer(&amd756_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03,
@@ -168,11 +171,7 @@ static int __init amd756_s4882_init(void)
/* Unregister physical bus */
error = i2c_del_adapter(&amd756_smbus);
if (error) {
- if (error == -EINVAL)
- error = -ENODEV;
- else
- dev_err(&amd756_smbus.dev, "Physical bus removal "
- "failed\n");
+ dev_err(&amd756_smbus.dev, "Physical bus removal failed\n");
goto ERROR0;
}
diff --git a/drivers/i2c/busses/i2c-nforce2-s4985.c b/drivers/i2c/busses/i2c-nforce2-s4985.c
index d1a4cbcf2aa4..29015eb9ca46 100644
--- a/drivers/i2c/busses/i2c-nforce2-s4985.c
+++ b/drivers/i2c/busses/i2c-nforce2-s4985.c
@@ -150,6 +150,9 @@ static int __init nforce2_s4985_init(void)
int i, error;
union i2c_smbus_data ioconfig;
+ if (!nforce2_smbus)
+ return -ENODEV;
+
/* Configure the PCA9556 multiplexer */
ioconfig.byte = 0x00; /* All I/O to output mode */
error = i2c_smbus_xfer(nforce2_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03,
@@ -161,8 +164,6 @@ static int __init nforce2_s4985_init(void)
}
/* Unregister physical bus */
- if (!nforce2_smbus)
- return -ENODEV;
error = i2c_del_adapter(nforce2_smbus);
if (error) {
dev_err(&nforce2_smbus->dev, "Physical bus removal failed\n");
diff --git a/drivers/i2c/chips/at24.c b/drivers/i2c/chips/at24.c
index e764c94f3e3d..2a4acb269569 100644
--- a/drivers/i2c/chips/at24.c
+++ b/drivers/i2c/chips/at24.c
@@ -188,7 +188,7 @@ static ssize_t at24_eeprom_read(struct at24_data *at24, char *buf,
count = I2C_SMBUS_BLOCK_MAX;
status = i2c_smbus_read_i2c_block_data(client, offset,
count, buf);
- dev_dbg(&client->dev, "smbus read %zd@%d --> %d\n",
+ dev_dbg(&client->dev, "smbus read %zu@%d --> %d\n",
count, offset, status);
return (status < 0) ? -EIO : status;
}
@@ -214,7 +214,7 @@ static ssize_t at24_eeprom_read(struct at24_data *at24, char *buf,
msg[1].len = count;
status = i2c_transfer(client->adapter, msg, 2);
- dev_dbg(&client->dev, "i2c read %zd@%d --> %d\n",
+ dev_dbg(&client->dev, "i2c read %zu@%d --> %d\n",
count, offset, status);
if (status == 2)
@@ -334,7 +334,7 @@ static ssize_t at24_eeprom_write(struct at24_data *at24, char *buf,
if (status == 1)
status = count;
}
- dev_dbg(&client->dev, "write %zd@%d --> %zd (%ld)\n",
+ dev_dbg(&client->dev, "write %zu@%d --> %zd (%ld)\n",
count, offset, status, jiffies);
if (status == count)
@@ -512,7 +512,7 @@ static int at24_probe(struct i2c_client *client, const struct i2c_device_id *id)
i2c_set_clientdata(client, at24);
- dev_info(&client->dev, "%Zd byte %s EEPROM %s\n",
+ dev_info(&client->dev, "%zu byte %s EEPROM %s\n",
at24->bin.size, client->name,
writable ? "(writable)" : "(read-only)");
dev_dbg(&client->dev,
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 7bf38c418086..550853f79ae8 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -813,7 +813,12 @@ static int i2c_check_addr(struct i2c_adapter *adapter, int addr)
int i2c_attach_client(struct i2c_client *client)
{
struct i2c_adapter *adapter = client->adapter;
- int res = 0;
+ int res;
+
+ /* Check for address business */
+ res = i2c_check_addr(adapter, client->addr);
+ if (res)
+ return res;
client->dev.parent = &client->adapter->dev;
client->dev.bus = &i2c_bus_type;
@@ -1451,9 +1456,11 @@ i2c_new_probed_device(struct i2c_adapter *adap,
if ((addr_list[i] & ~0x07) == 0x30
|| (addr_list[i] & ~0x0f) == 0x50
|| !i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) {
+ union i2c_smbus_data data;
+
if (i2c_smbus_xfer(adap, addr_list[i], 0,
I2C_SMBUS_READ, 0,
- I2C_SMBUS_BYTE, NULL) >= 0)
+ I2C_SMBUS_BYTE, &data) >= 0)
break;
} else {
if (i2c_smbus_xfer(adap, addr_list[i], 0,
diff --git a/drivers/i2c/i2c-dev.c b/drivers/i2c/i2c-dev.c
index 9d55c6383b23..af4491fa7e34 100644
--- a/drivers/i2c/i2c-dev.c
+++ b/drivers/i2c/i2c-dev.c
@@ -147,7 +147,7 @@ static ssize_t i2cdev_read (struct file *file, char __user *buf, size_t count,
if (tmp==NULL)
return -ENOMEM;
- pr_debug("i2c-dev: i2c-%d reading %zd bytes.\n",
+ pr_debug("i2c-dev: i2c-%d reading %zu bytes.\n",
iminor(file->f_path.dentry->d_inode), count);
ret = i2c_master_recv(client,tmp,count);
@@ -175,7 +175,7 @@ static ssize_t i2cdev_write (struct file *file, const char __user *buf, size_t c
return -EFAULT;
}
- pr_debug("i2c-dev: i2c-%d writing %zd bytes.\n",
+ pr_debug("i2c-dev: i2c-%d writing %zu bytes.\n",
iminor(file->f_path.dentry->d_inode), count);
ret = i2c_master_send(client,tmp,count);