mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-12 21:57:43 +00:00
Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: hwmon: (lm75) Drop legacy i2c driver i2c: correct some size_t printk formats i2c: Check for address business before creating clients i2c: Let users select algorithm drivers manually again i2c: Fix NULL pointer dereference in i2c_new_probed_device i2c: Fix oops on bus multiplexer driver loading
This commit is contained in:
commit
29bb1bdb26
8 changed files with 66 additions and 110 deletions
|
@ -54,11 +54,11 @@ enum lm75_type { /* keep sorted in alphabetical order */
|
||||||
tmp75,
|
tmp75,
|
||||||
};
|
};
|
||||||
|
|
||||||
/* Addresses scanned by legacy style driver binding */
|
/* Addresses scanned */
|
||||||
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
|
static const unsigned short normal_i2c[] = { 0x48, 0x49, 0x4a, 0x4b, 0x4c,
|
||||||
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
|
0x4d, 0x4e, 0x4f, I2C_CLIENT_END };
|
||||||
|
|
||||||
/* Insmod parameters (only for legacy style driver binding) */
|
/* Insmod parameters */
|
||||||
I2C_CLIENT_INSMOD_1(lm75);
|
I2C_CLIENT_INSMOD_1(lm75);
|
||||||
|
|
||||||
|
|
||||||
|
@ -72,7 +72,6 @@ static const u8 LM75_REG_TEMP[3] = {
|
||||||
|
|
||||||
/* Each client has this additional data */
|
/* Each client has this additional data */
|
||||||
struct lm75_data {
|
struct lm75_data {
|
||||||
struct i2c_client *client;
|
|
||||||
struct device *hwmon_dev;
|
struct device *hwmon_dev;
|
||||||
struct mutex update_lock;
|
struct mutex update_lock;
|
||||||
u8 orig_conf;
|
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
|
static int
|
||||||
lm75_probe(struct i2c_client *client, const struct i2c_device_id *id)
|
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;
|
return -ENOMEM;
|
||||||
|
|
||||||
i2c_set_clientdata(client, data);
|
i2c_set_clientdata(client, data);
|
||||||
|
|
||||||
data->client = client;
|
|
||||||
mutex_init(&data->update_lock);
|
mutex_init(&data->update_lock);
|
||||||
|
|
||||||
/* Set to LM75 resolution (9 bits, 1/2 degree C) and range.
|
/* 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);
|
MODULE_DEVICE_TABLE(i2c, lm75_ids);
|
||||||
|
|
||||||
static struct i2c_driver lm75_driver = {
|
/* Return 0 if detection is successful, -ENODEV otherwise */
|
||||||
.driver = {
|
static int lm75_detect(struct i2c_client *new_client, int kind,
|
||||||
.name = "lm75",
|
struct i2c_board_info *info)
|
||||||
},
|
|
||||||
.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)
|
|
||||||
{
|
{
|
||||||
|
struct i2c_adapter *adapter = new_client->adapter;
|
||||||
int i;
|
int i;
|
||||||
struct i2c_client *new_client;
|
|
||||||
int err = 0;
|
|
||||||
|
|
||||||
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA |
|
||||||
I2C_FUNC_SMBUS_WORD_DATA))
|
I2C_FUNC_SMBUS_WORD_DATA))
|
||||||
goto exit;
|
return -ENODEV;
|
||||||
|
|
||||||
/* 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;
|
|
||||||
|
|
||||||
/* Now, we do the remaining detection. There is no identification-
|
/* Now, we do the remaining detection. There is no identification-
|
||||||
dedicated register so we have to rely on several tricks:
|
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, 5) != hyst
|
||||||
|| i2c_smbus_read_word_data(new_client, 6) != hyst
|
|| i2c_smbus_read_word_data(new_client, 6) != hyst
|
||||||
|| i2c_smbus_read_word_data(new_client, 7) != hyst)
|
|| i2c_smbus_read_word_data(new_client, 7) != hyst)
|
||||||
goto exit_free;
|
return -ENODEV;
|
||||||
os = i2c_smbus_read_word_data(new_client, 3);
|
os = i2c_smbus_read_word_data(new_client, 3);
|
||||||
if (i2c_smbus_read_word_data(new_client, 4) != os
|
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, 5) != os
|
||||||
|| i2c_smbus_read_word_data(new_client, 6) != os
|
|| i2c_smbus_read_word_data(new_client, 6) != os
|
||||||
|| i2c_smbus_read_word_data(new_client, 7) != os)
|
|| i2c_smbus_read_word_data(new_client, 7) != os)
|
||||||
goto exit_free;
|
return -ENODEV;
|
||||||
|
|
||||||
/* Unused bits */
|
/* Unused bits */
|
||||||
if (conf & 0xe0)
|
if (conf & 0xe0)
|
||||||
goto exit_free;
|
return -ENODEV;
|
||||||
|
|
||||||
/* Addresses cycling */
|
/* Addresses cycling */
|
||||||
for (i = 8; i < 0xff; i += 8)
|
for (i = 8; i < 0xff; i += 8)
|
||||||
if (i2c_smbus_read_byte_data(new_client, i + 1) != conf
|
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 + 2) != hyst
|
||||||
|| i2c_smbus_read_word_data(new_client, i + 3) != os)
|
|| i2c_smbus_read_word_data(new_client, i + 3) != os)
|
||||||
goto exit_free;
|
return -ENODEV;
|
||||||
}
|
}
|
||||||
|
|
||||||
/* NOTE: we treat "force=..." and "force_lm75=..." the same.
|
/* NOTE: we treat "force=..." and "force_lm75=..." the same.
|
||||||
* Only new-style driver binding distinguishes chip types.
|
* Only new-style driver binding distinguishes chip types.
|
||||||
*/
|
*/
|
||||||
strlcpy(new_client->name, "lm75", I2C_NAME_SIZE);
|
strlcpy(info->type, "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;
|
|
||||||
|
|
||||||
return 0;
|
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)
|
static struct i2c_driver lm75_driver = {
|
||||||
{
|
.class = I2C_CLASS_HWMON,
|
||||||
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 = {
|
|
||||||
.driver = {
|
.driver = {
|
||||||
.name = "lm75_legacy",
|
.name = "lm75",
|
||||||
},
|
},
|
||||||
.attach_adapter = lm75_attach_adapter,
|
.probe = lm75_probe,
|
||||||
.detach_client = lm75_detach_client,
|
.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)
|
static int __init sensors_lm75_init(void)
|
||||||
{
|
{
|
||||||
int status;
|
return i2c_add_driver(&lm75_driver);
|
||||||
|
|
||||||
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;
|
|
||||||
}
|
}
|
||||||
|
|
||||||
static void __exit sensors_lm75_exit(void)
|
static void __exit sensors_lm75_exit(void)
|
||||||
{
|
{
|
||||||
i2c_del_driver(&lm75_legacy_driver);
|
|
||||||
i2c_del_driver(&lm75_driver);
|
i2c_del_driver(&lm75_driver);
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -38,6 +38,20 @@ config I2C_CHARDEV
|
||||||
This support is also available as a module. If so, the module
|
This support is also available as a module. If so, the module
|
||||||
will be called i2c-dev.
|
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/algos/Kconfig
|
||||||
source drivers/i2c/busses/Kconfig
|
source drivers/i2c/busses/Kconfig
|
||||||
source drivers/i2c/chips/Kconfig
|
source drivers/i2c/chips/Kconfig
|
||||||
|
|
|
@ -2,15 +2,20 @@
|
||||||
# I2C algorithm drivers configuration
|
# I2C algorithm drivers configuration
|
||||||
#
|
#
|
||||||
|
|
||||||
|
menu "I2C Algorithms"
|
||||||
|
depends on !I2C_HELPER_AUTO
|
||||||
|
|
||||||
config I2C_ALGOBIT
|
config I2C_ALGOBIT
|
||||||
tristate
|
tristate "I2C bit-banging interfaces"
|
||||||
|
|
||||||
config I2C_ALGOPCF
|
config I2C_ALGOPCF
|
||||||
tristate
|
tristate "I2C PCF 8584 interfaces"
|
||||||
|
|
||||||
config I2C_ALGOPCA
|
config I2C_ALGOPCA
|
||||||
tristate
|
tristate "I2C PCA 9564 interfaces"
|
||||||
|
|
||||||
config I2C_ALGO_SGI
|
config I2C_ALGO_SGI
|
||||||
tristate
|
tristate
|
||||||
depends on SGI_IP22 || SGI_IP32 || X86_VISWS
|
depends on SGI_IP22 || SGI_IP32 || X86_VISWS
|
||||||
|
|
||||||
|
endmenu
|
||||||
|
|
|
@ -155,6 +155,9 @@ static int __init amd756_s4882_init(void)
|
||||||
int i, error;
|
int i, error;
|
||||||
union i2c_smbus_data ioconfig;
|
union i2c_smbus_data ioconfig;
|
||||||
|
|
||||||
|
if (!amd756_smbus.dev.parent)
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
/* Configure the PCA9556 multiplexer */
|
/* Configure the PCA9556 multiplexer */
|
||||||
ioconfig.byte = 0x00; /* All I/O to output mode */
|
ioconfig.byte = 0x00; /* All I/O to output mode */
|
||||||
error = i2c_smbus_xfer(&amd756_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03,
|
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 */
|
/* Unregister physical bus */
|
||||||
error = i2c_del_adapter(&amd756_smbus);
|
error = i2c_del_adapter(&amd756_smbus);
|
||||||
if (error) {
|
if (error) {
|
||||||
if (error == -EINVAL)
|
dev_err(&amd756_smbus.dev, "Physical bus removal failed\n");
|
||||||
error = -ENODEV;
|
|
||||||
else
|
|
||||||
dev_err(&amd756_smbus.dev, "Physical bus removal "
|
|
||||||
"failed\n");
|
|
||||||
goto ERROR0;
|
goto ERROR0;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
|
@ -150,6 +150,9 @@ static int __init nforce2_s4985_init(void)
|
||||||
int i, error;
|
int i, error;
|
||||||
union i2c_smbus_data ioconfig;
|
union i2c_smbus_data ioconfig;
|
||||||
|
|
||||||
|
if (!nforce2_smbus)
|
||||||
|
return -ENODEV;
|
||||||
|
|
||||||
/* Configure the PCA9556 multiplexer */
|
/* Configure the PCA9556 multiplexer */
|
||||||
ioconfig.byte = 0x00; /* All I/O to output mode */
|
ioconfig.byte = 0x00; /* All I/O to output mode */
|
||||||
error = i2c_smbus_xfer(nforce2_smbus, 0x18, 0, I2C_SMBUS_WRITE, 0x03,
|
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 */
|
/* Unregister physical bus */
|
||||||
if (!nforce2_smbus)
|
|
||||||
return -ENODEV;
|
|
||||||
error = i2c_del_adapter(nforce2_smbus);
|
error = i2c_del_adapter(nforce2_smbus);
|
||||||
if (error) {
|
if (error) {
|
||||||
dev_err(&nforce2_smbus->dev, "Physical bus removal failed\n");
|
dev_err(&nforce2_smbus->dev, "Physical bus removal failed\n");
|
||||||
|
|
|
@ -188,7 +188,7 @@ static ssize_t at24_eeprom_read(struct at24_data *at24, char *buf,
|
||||||
count = I2C_SMBUS_BLOCK_MAX;
|
count = I2C_SMBUS_BLOCK_MAX;
|
||||||
status = i2c_smbus_read_i2c_block_data(client, offset,
|
status = i2c_smbus_read_i2c_block_data(client, offset,
|
||||||
count, buf);
|
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);
|
count, offset, status);
|
||||||
return (status < 0) ? -EIO : 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;
|
msg[1].len = count;
|
||||||
|
|
||||||
status = i2c_transfer(client->adapter, msg, 2);
|
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);
|
count, offset, status);
|
||||||
|
|
||||||
if (status == 2)
|
if (status == 2)
|
||||||
|
@ -334,7 +334,7 @@ static ssize_t at24_eeprom_write(struct at24_data *at24, char *buf,
|
||||||
if (status == 1)
|
if (status == 1)
|
||||||
status = count;
|
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);
|
count, offset, status, jiffies);
|
||||||
|
|
||||||
if (status == count)
|
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);
|
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,
|
at24->bin.size, client->name,
|
||||||
writable ? "(writable)" : "(read-only)");
|
writable ? "(writable)" : "(read-only)");
|
||||||
dev_dbg(&client->dev,
|
dev_dbg(&client->dev,
|
||||||
|
|
|
@ -813,7 +813,12 @@ static int i2c_check_addr(struct i2c_adapter *adapter, int addr)
|
||||||
int i2c_attach_client(struct i2c_client *client)
|
int i2c_attach_client(struct i2c_client *client)
|
||||||
{
|
{
|
||||||
struct i2c_adapter *adapter = client->adapter;
|
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.parent = &client->adapter->dev;
|
||||||
client->dev.bus = &i2c_bus_type;
|
client->dev.bus = &i2c_bus_type;
|
||||||
|
@ -1451,9 +1456,11 @@ i2c_new_probed_device(struct i2c_adapter *adap,
|
||||||
if ((addr_list[i] & ~0x07) == 0x30
|
if ((addr_list[i] & ~0x07) == 0x30
|
||||||
|| (addr_list[i] & ~0x0f) == 0x50
|
|| (addr_list[i] & ~0x0f) == 0x50
|
||||||
|| !i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) {
|
|| !i2c_check_functionality(adap, I2C_FUNC_SMBUS_QUICK)) {
|
||||||
|
union i2c_smbus_data data;
|
||||||
|
|
||||||
if (i2c_smbus_xfer(adap, addr_list[i], 0,
|
if (i2c_smbus_xfer(adap, addr_list[i], 0,
|
||||||
I2C_SMBUS_READ, 0,
|
I2C_SMBUS_READ, 0,
|
||||||
I2C_SMBUS_BYTE, NULL) >= 0)
|
I2C_SMBUS_BYTE, &data) >= 0)
|
||||||
break;
|
break;
|
||||||
} else {
|
} else {
|
||||||
if (i2c_smbus_xfer(adap, addr_list[i], 0,
|
if (i2c_smbus_xfer(adap, addr_list[i], 0,
|
||||||
|
|
|
@ -147,7 +147,7 @@ static ssize_t i2cdev_read (struct file *file, char __user *buf, size_t count,
|
||||||
if (tmp==NULL)
|
if (tmp==NULL)
|
||||||
return -ENOMEM;
|
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);
|
iminor(file->f_path.dentry->d_inode), count);
|
||||||
|
|
||||||
ret = i2c_master_recv(client,tmp,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;
|
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);
|
iminor(file->f_path.dentry->d_inode), count);
|
||||||
|
|
||||||
ret = i2c_master_send(client,tmp,count);
|
ret = i2c_master_send(client,tmp,count);
|
||||||
|
|
Loading…
Reference in a new issue