From e4a7b9b04de15f6b63da5ccdd373ffa3057a3681 Mon Sep 17 00:00:00 2001 From: Wolfram Sang Date: Tue, 4 May 2010 11:09:27 +0200 Subject: i2c-core: Erase pointer to clientdata on removal After discovering that a lot of i2c-drivers leave the pointer to their clientdata dangling, it was decided to let the core handle this issue. It is assumed that the core may access the private data after remove() as there are no guarantees for the lifetime of such pointers anyhow (see thread starting at http://lkml.org/lkml/2010/3/21/68) Signed-off-by: Wolfram Sang Signed-off-by: Jean Delvare --- drivers/i2c/i2c-core.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 3202a86f420e..b9306b1a6baa 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -117,8 +117,10 @@ static int i2c_device_probe(struct device *dev) dev_dbg(dev, "probe\n"); status = driver->probe(client, i2c_match_id(driver->id_table, client)); - if (status) + if (status) { client->driver = NULL; + i2c_set_clientdata(client, NULL); + } return status; } @@ -139,8 +141,10 @@ static int i2c_device_remove(struct device *dev) dev->driver = NULL; status = 0; } - if (status == 0) + if (status == 0) { client->driver = NULL; + i2c_set_clientdata(client, NULL); + } return status; } -- cgit v1.2.3 From b1d4b390ea4bb480e65974ce522a04022608a8df Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Tue, 4 May 2010 11:09:28 +0200 Subject: i2c: Fix probing of FSC hardware monitoring chips Some FSC hardware monitoring chips (Syleus at least) doesn't like quick writes we typically use to probe for I2C chips. Use a regular byte read instead for the address they live at (0x73). These are the only known chips living at this address on PC systems. For clarity, this fix should not be needed for kernels 2.6.30 and later, as we started instantiating the hwmon devices explicitly based on DMI data. Still, this fix is valuable in the following two cases: * Support for recent FSC chips on older kernels. The DMI-based device instantiation is more difficult to backport than the device support itself. * Case where the DMI-based device instantiation fails, whatever the reason. We fall back to probing in that case, so it should work. This fixes kernel bug #15634: https://bugzilla.kernel.org/show_bug.cgi?id=15634 Signed-off-by: Jean Delvare Acked-by: Hans de Goede Cc: stable@kernel.org --- drivers/i2c/i2c-core.c | 21 ++++++++++++++++----- 1 file changed, 16 insertions(+), 5 deletions(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index b9306b1a6baa..5105126225c3 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1264,12 +1264,23 @@ static int i2c_detect_address(struct i2c_client *temp_client, return 0; /* Make sure there is something at this address */ - if (i2c_smbus_xfer(adapter, addr, 0, 0, 0, I2C_SMBUS_QUICK, NULL) < 0) - return 0; + if (addr == 0x73 && (adapter->class & I2C_CLASS_HWMON)) { + /* Special probe for FSC hwmon chips */ + union i2c_smbus_data dummy; - /* Prevent 24RF08 corruption */ - if ((addr & ~0x0f) == 0x50) - i2c_smbus_xfer(adapter, addr, 0, 0, 0, I2C_SMBUS_QUICK, NULL); + if (i2c_smbus_xfer(adapter, addr, 0, I2C_SMBUS_READ, 0, + I2C_SMBUS_BYTE_DATA, &dummy) < 0) + return 0; + } else { + if (i2c_smbus_xfer(adapter, addr, 0, I2C_SMBUS_WRITE, 0, + I2C_SMBUS_QUICK, NULL) < 0) + return 0; + + /* Prevent 24RF08 corruption */ + if ((addr & ~0x0f) == 0x50) + i2c_smbus_xfer(adapter, addr, 0, I2C_SMBUS_WRITE, 0, + I2C_SMBUS_QUICK, NULL); + } /* Finally call the custom detection function */ memset(&info, 0, sizeof(struct i2c_board_info)); -- cgit v1.2.3 From 6629dcff19470a894ce294d0adb9cbab94ee1fb9 Mon Sep 17 00:00:00 2001 From: Jean Delvare Date: Tue, 4 May 2010 11:09:28 +0200 Subject: i2c-core: Use per-adapter userspace device lists Using a single list for all userspace devices leads to a dead lock on multiplexed buses in some circumstances (mux chip instantiated from userspace). This is solved by using a separate list for each bus segment. Signed-off-by: Jean Delvare Acked-by: Michael Lawnick --- drivers/i2c/i2c-core.c | 34 ++++++++++++++++++---------------- include/linux/i2c.h | 2 ++ 2 files changed, 20 insertions(+), 16 deletions(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 5105126225c3..c2258a51fe0c 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -40,12 +40,11 @@ #include "i2c-core.h" -/* core_lock protects i2c_adapter_idr, userspace_devices, and guarantees +/* core_lock protects i2c_adapter_idr, and guarantees that device detection, deletion of detected devices, and attach_adapter and detach_adapter calls are serialized */ static DEFINE_MUTEX(core_lock); static DEFINE_IDR(i2c_adapter_idr); -static LIST_HEAD(userspace_devices); static struct device_type i2c_client_type; static int i2c_check_addr(struct i2c_adapter *adapter, int addr); @@ -542,9 +541,9 @@ i2c_sysfs_new_device(struct device *dev, struct device_attribute *attr, return -EEXIST; /* Keep track of the added device */ - mutex_lock(&core_lock); - list_add_tail(&client->detected, &userspace_devices); - mutex_unlock(&core_lock); + i2c_lock_adapter(adap); + list_add_tail(&client->detected, &adap->userspace_clients); + i2c_unlock_adapter(adap); dev_info(dev, "%s: Instantiated device %s at 0x%02hx\n", "new_device", info.type, info.addr); @@ -583,9 +582,10 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr, /* Make sure the device was added through sysfs */ res = -ENOENT; - mutex_lock(&core_lock); - list_for_each_entry_safe(client, next, &userspace_devices, detected) { - if (client->addr == addr && client->adapter == adap) { + i2c_lock_adapter(adap); + list_for_each_entry_safe(client, next, &adap->userspace_clients, + detected) { + if (client->addr == addr) { dev_info(dev, "%s: Deleting device %s at 0x%02hx\n", "delete_device", client->name, client->addr); @@ -595,7 +595,7 @@ i2c_sysfs_delete_device(struct device *dev, struct device_attribute *attr, break; } } - mutex_unlock(&core_lock); + i2c_unlock_adapter(adap); if (res < 0) dev_err(dev, "%s: Can't find device in list\n", @@ -677,6 +677,7 @@ static int i2c_register_adapter(struct i2c_adapter *adap) } rt_mutex_init(&adap->bus_lock); + INIT_LIST_HEAD(&adap->userspace_clients); /* Set default timeout to 1 second if not already set */ if (adap->timeout == 0) @@ -879,14 +880,15 @@ int i2c_del_adapter(struct i2c_adapter *adap) return res; /* Remove devices instantiated from sysfs */ - list_for_each_entry_safe(client, next, &userspace_devices, detected) { - if (client->adapter == adap) { - dev_dbg(&adap->dev, "Removing %s at 0x%x\n", - client->name, client->addr); - list_del(&client->detected); - i2c_unregister_device(client); - } + i2c_lock_adapter(adap); + list_for_each_entry_safe(client, next, &adap->userspace_clients, + detected) { + dev_dbg(&adap->dev, "Removing %s at 0x%x\n", client->name, + client->addr); + list_del(&client->detected); + i2c_unregister_device(client); } + i2c_unlock_adapter(adap); /* Detach any active clients. This can't fail, thus we do not checking the returned value. */ diff --git a/include/linux/i2c.h b/include/linux/i2c.h index 0a5da639b327..6ed1d59bfb1e 100644 --- a/include/linux/i2c.h +++ b/include/linux/i2c.h @@ -355,6 +355,8 @@ struct i2c_adapter { int nr; char name[48]; struct completion dev_released; + + struct list_head userspace_clients; }; #define to_i2c_adapter(d) container_of(d, struct i2c_adapter, dev) -- cgit v1.2.3 From 2f60ba706bd9af84c4eab704243b262e69556f2e Mon Sep 17 00:00:00 2001 From: "Rafael J. Wysocki" Date: Mon, 10 May 2010 23:09:30 +0200 Subject: i2c: Fix bus-level power management callbacks There are three issues with the i2c bus type's power management callbacks at the moment. First, they don't include any hibernate callbacks, although they should at least include the .restore() callback (there's no guarantee that the driver will be present in memory before loading the image kernel and we must restore the pre-hibernation state of the device). Second, the "legacy" callbacks are not going to be invoked by the PM core since the bus type's pm object is not NULL. Finally, the system sleep PM (ie. suspend/resume) callbacks don't check if the device has been already suspended at run time, in which case they should skip suspending it. Also, it looks like the i2c bus type can use the generic subsystem-level runtime PM callbacks. For these reasons, rework the system sleep PM callbacks provided by the i2c bus type to handle hibernation correctly and to invoke the "legacy" callbacks for drivers that provide them. In addition to that make the i2c bus type use the generic subsystem-level runtime PM callbacks. Signed-off-by: Rafael J. Wysocki Acked-by: Mark Brown Acked-by: Jean Delvare --- drivers/i2c/i2c-core.c | 166 ++++++++++++++++++++++++++------------------- include/linux/pm_runtime.h | 7 ++ 2 files changed, 104 insertions(+), 69 deletions(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index c2258a51fe0c..7c469a62c3c1 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -159,107 +159,131 @@ static void i2c_device_shutdown(struct device *dev) driver->shutdown(client); } -#ifdef CONFIG_SUSPEND -static int i2c_device_pm_suspend(struct device *dev) +#ifdef CONFIG_PM_SLEEP +static int i2c_legacy_suspend(struct device *dev, pm_message_t mesg) { - const struct dev_pm_ops *pm; + struct i2c_client *client = i2c_verify_client(dev); + struct i2c_driver *driver; - if (!dev->driver) + if (!client || !dev->driver) return 0; - pm = dev->driver->pm; - if (!pm || !pm->suspend) + driver = to_i2c_driver(dev->driver); + if (!driver->suspend) return 0; - return pm->suspend(dev); + return driver->suspend(client, mesg); } -static int i2c_device_pm_resume(struct device *dev) +static int i2c_legacy_resume(struct device *dev) { - const struct dev_pm_ops *pm; + struct i2c_client *client = i2c_verify_client(dev); + struct i2c_driver *driver; - if (!dev->driver) + if (!client || !dev->driver) return 0; - pm = dev->driver->pm; - if (!pm || !pm->resume) + driver = to_i2c_driver(dev->driver); + if (!driver->resume) return 0; - return pm->resume(dev); + return driver->resume(client); } -#else -#define i2c_device_pm_suspend NULL -#define i2c_device_pm_resume NULL -#endif -#ifdef CONFIG_PM_RUNTIME -static int i2c_device_runtime_suspend(struct device *dev) +static int i2c_device_pm_suspend(struct device *dev) { - const struct dev_pm_ops *pm; + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - if (!dev->driver) - return 0; - pm = dev->driver->pm; - if (!pm || !pm->runtime_suspend) + if (pm_runtime_suspended(dev)) return 0; - return pm->runtime_suspend(dev); -} -static int i2c_device_runtime_resume(struct device *dev) -{ - const struct dev_pm_ops *pm; + if (pm) + return pm->suspend ? pm->suspend(dev) : 0; - if (!dev->driver) - return 0; - pm = dev->driver->pm; - if (!pm || !pm->runtime_resume) - return 0; - return pm->runtime_resume(dev); + return i2c_legacy_suspend(dev, PMSG_SUSPEND); } -static int i2c_device_runtime_idle(struct device *dev) +static int i2c_device_pm_resume(struct device *dev) { - const struct dev_pm_ops *pm = NULL; + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; int ret; - if (dev->driver) - pm = dev->driver->pm; - if (pm && pm->runtime_idle) { - ret = pm->runtime_idle(dev); - if (ret) - return ret; + if (pm) + ret = pm->resume ? pm->resume(dev) : 0; + else + ret = i2c_legacy_resume(dev); + + if (!ret) { + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); } - return pm_runtime_suspend(dev); + return ret; } -#else -#define i2c_device_runtime_suspend NULL -#define i2c_device_runtime_resume NULL -#define i2c_device_runtime_idle NULL -#endif -static int i2c_device_suspend(struct device *dev, pm_message_t mesg) +static int i2c_device_pm_freeze(struct device *dev) { - struct i2c_client *client = i2c_verify_client(dev); - struct i2c_driver *driver; + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - if (!client || !dev->driver) + if (pm_runtime_suspended(dev)) return 0; - driver = to_i2c_driver(dev->driver); - if (!driver->suspend) - return 0; - return driver->suspend(client, mesg); + + if (pm) + return pm->freeze ? pm->freeze(dev) : 0; + + return i2c_legacy_suspend(dev, PMSG_FREEZE); } -static int i2c_device_resume(struct device *dev) +static int i2c_device_pm_thaw(struct device *dev) { - struct i2c_client *client = i2c_verify_client(dev); - struct i2c_driver *driver; + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; - if (!client || !dev->driver) + if (pm_runtime_suspended(dev)) return 0; - driver = to_i2c_driver(dev->driver); - if (!driver->resume) + + if (pm) + return pm->thaw ? pm->thaw(dev) : 0; + + return i2c_legacy_resume(dev); +} + +static int i2c_device_pm_poweroff(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + + if (pm_runtime_suspended(dev)) return 0; - return driver->resume(client); + + if (pm) + return pm->poweroff ? pm->poweroff(dev) : 0; + + return i2c_legacy_suspend(dev, PMSG_HIBERNATE); } +static int i2c_device_pm_restore(struct device *dev) +{ + const struct dev_pm_ops *pm = dev->driver ? dev->driver->pm : NULL; + int ret; + + if (pm) + ret = pm->restore ? pm->restore(dev) : 0; + else + ret = i2c_legacy_resume(dev); + + if (!ret) { + pm_runtime_disable(dev); + pm_runtime_set_active(dev); + pm_runtime_enable(dev); + } + + return ret; +} +#else /* !CONFIG_PM_SLEEP */ +#define i2c_device_pm_suspend NULL +#define i2c_device_pm_resume NULL +#define i2c_device_pm_freeze NULL +#define i2c_device_pm_thaw NULL +#define i2c_device_pm_poweroff NULL +#define i2c_device_pm_restore NULL +#endif /* !CONFIG_PM_SLEEP */ + static void i2c_client_dev_release(struct device *dev) { kfree(to_i2c_client(dev)); @@ -301,9 +325,15 @@ static const struct attribute_group *i2c_dev_attr_groups[] = { static const struct dev_pm_ops i2c_device_pm_ops = { .suspend = i2c_device_pm_suspend, .resume = i2c_device_pm_resume, - .runtime_suspend = i2c_device_runtime_suspend, - .runtime_resume = i2c_device_runtime_resume, - .runtime_idle = i2c_device_runtime_idle, + .freeze = i2c_device_pm_freeze, + .thaw = i2c_device_pm_thaw, + .poweroff = i2c_device_pm_poweroff, + .restore = i2c_device_pm_restore, + SET_RUNTIME_PM_OPS( + pm_generic_runtime_suspend, + pm_generic_runtime_resume, + pm_generic_runtime_idle + ) }; struct bus_type i2c_bus_type = { @@ -312,8 +342,6 @@ struct bus_type i2c_bus_type = { .probe = i2c_device_probe, .remove = i2c_device_remove, .shutdown = i2c_device_shutdown, - .suspend = i2c_device_suspend, - .resume = i2c_device_resume, .pm = &i2c_device_pm_ops, }; EXPORT_SYMBOL_GPL(i2c_bus_type); diff --git a/include/linux/pm_runtime.h b/include/linux/pm_runtime.h index b776db737244..6e81888c6222 100644 --- a/include/linux/pm_runtime.h +++ b/include/linux/pm_runtime.h @@ -30,6 +30,9 @@ extern void pm_runtime_enable(struct device *dev); extern void __pm_runtime_disable(struct device *dev, bool check_resume); extern void pm_runtime_allow(struct device *dev); extern void pm_runtime_forbid(struct device *dev); +extern int pm_generic_runtime_idle(struct device *dev); +extern int pm_generic_runtime_suspend(struct device *dev); +extern int pm_generic_runtime_resume(struct device *dev); static inline bool pm_children_suspended(struct device *dev) { @@ -96,6 +99,10 @@ static inline bool device_run_wake(struct device *dev) { return false; } static inline void device_set_run_wake(struct device *dev, bool enable) {} static inline bool pm_runtime_suspended(struct device *dev) { return false; } +static inline int pm_generic_runtime_idle(struct device *dev) { return 0; } +static inline int pm_generic_runtime_suspend(struct device *dev) { return 0; } +static inline int pm_generic_runtime_resume(struct device *dev) { return 0; } + #endif /* !CONFIG_PM_RUNTIME */ static inline int pm_runtime_get(struct device *dev) -- cgit v1.2.3 From 7225acf4aa2855787184af92febedd92284776ee Mon Sep 17 00:00:00 2001 From: Farid Hammane Date: Fri, 21 May 2010 18:40:58 +0200 Subject: i2c-core: Fix some coding style issues Fix up coding style issues found by the checkpatch.pl tool. Signed-off-by: Farid Hammane Signed-off-by: Jean Delvare --- drivers/i2c/i2c-core.c | 90 +++++++++++++++++++++++++------------------------- 1 file changed, 45 insertions(+), 45 deletions(-) (limited to 'drivers/i2c/i2c-core.c') diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c index 7c469a62c3c1..db3c9f3a7647 100644 --- a/drivers/i2c/i2c-core.c +++ b/drivers/i2c/i2c-core.c @@ -1221,10 +1221,10 @@ EXPORT_SYMBOL(i2c_transfer); * * Returns negative errno, or else the number of bytes written. */ -int i2c_master_send(struct i2c_client *client,const char *buf ,int count) +int i2c_master_send(struct i2c_client *client, const char *buf, int count) { int ret; - struct i2c_adapter *adap=client->adapter; + struct i2c_adapter *adap = client->adapter; struct i2c_msg msg; msg.addr = client->addr; @@ -1248,9 +1248,9 @@ EXPORT_SYMBOL(i2c_master_send); * * Returns negative errno, or else the number of bytes read. */ -int i2c_master_recv(struct i2c_client *client, char *buf ,int count) +int i2c_master_recv(struct i2c_client *client, char *buf, int count) { - struct i2c_adapter *adap=client->adapter; + struct i2c_adapter *adap = client->adapter; struct i2c_msg msg; int ret; @@ -1452,7 +1452,7 @@ i2c_new_probed_device(struct i2c_adapter *adap, } EXPORT_SYMBOL_GPL(i2c_new_probed_device); -struct i2c_adapter* i2c_get_adapter(int id) +struct i2c_adapter *i2c_get_adapter(int id) { struct i2c_adapter *adapter; @@ -1479,7 +1479,7 @@ static u8 crc8(u16 data) { int i; - for(i = 0; i < 8; i++) { + for (i = 0; i < 8; i++) { if (data & 0x8000) data = data ^ POLY; data = data << 1; @@ -1492,7 +1492,7 @@ static u8 i2c_smbus_pec(u8 crc, u8 *p, size_t count) { int i; - for(i = 0; i < count; i++) + for (i = 0; i < count; i++) crc = crc8((crc ^ p[i]) << 8); return crc; } @@ -1562,7 +1562,7 @@ EXPORT_SYMBOL(i2c_smbus_read_byte); */ s32 i2c_smbus_write_byte(struct i2c_client *client, u8 value) { - return i2c_smbus_xfer(client->adapter,client->addr,client->flags, + return i2c_smbus_xfer(client->adapter, client->addr, client->flags, I2C_SMBUS_WRITE, value, I2C_SMBUS_BYTE, NULL); } EXPORT_SYMBOL(i2c_smbus_write_byte); @@ -1600,9 +1600,9 @@ s32 i2c_smbus_write_byte_data(struct i2c_client *client, u8 command, u8 value) { union i2c_smbus_data data; data.byte = value; - return i2c_smbus_xfer(client->adapter,client->addr,client->flags, - I2C_SMBUS_WRITE,command, - I2C_SMBUS_BYTE_DATA,&data); + return i2c_smbus_xfer(client->adapter, client->addr, client->flags, + I2C_SMBUS_WRITE, command, + I2C_SMBUS_BYTE_DATA, &data); } EXPORT_SYMBOL(i2c_smbus_write_byte_data); @@ -1639,9 +1639,9 @@ s32 i2c_smbus_write_word_data(struct i2c_client *client, u8 command, u16 value) { union i2c_smbus_data data; data.word = value; - return i2c_smbus_xfer(client->adapter,client->addr,client->flags, - I2C_SMBUS_WRITE,command, - I2C_SMBUS_WORD_DATA,&data); + return i2c_smbus_xfer(client->adapter, client->addr, client->flags, + I2C_SMBUS_WRITE, command, + I2C_SMBUS_WORD_DATA, &data); } EXPORT_SYMBOL(i2c_smbus_write_word_data); @@ -1718,9 +1718,9 @@ s32 i2c_smbus_write_block_data(struct i2c_client *client, u8 command, length = I2C_SMBUS_BLOCK_MAX; data.block[0] = length; memcpy(&data.block[1], values, length); - return i2c_smbus_xfer(client->adapter,client->addr,client->flags, - I2C_SMBUS_WRITE,command, - I2C_SMBUS_BLOCK_DATA,&data); + return i2c_smbus_xfer(client->adapter, client->addr, client->flags, + I2C_SMBUS_WRITE, command, + I2C_SMBUS_BLOCK_DATA, &data); } EXPORT_SYMBOL(i2c_smbus_write_block_data); @@ -1762,10 +1762,10 @@ EXPORT_SYMBOL(i2c_smbus_write_i2c_block_data); /* Simulate a SMBus command using the i2c protocol No checking of parameters is done! */ -static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, - unsigned short flags, - char read_write, u8 command, int size, - union i2c_smbus_data * data) +static s32 i2c_smbus_xfer_emulated(struct i2c_adapter *adapter, u16 addr, + unsigned short flags, + char read_write, u8 command, int size, + union i2c_smbus_data *data) { /* So we need to generate a series of msgs. In the case of writing, we need to use only one message; when reading, we need two. We initialize @@ -1773,7 +1773,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, simpler. */ unsigned char msgbuf0[I2C_SMBUS_BLOCK_MAX+3]; unsigned char msgbuf1[I2C_SMBUS_BLOCK_MAX+2]; - int num = read_write == I2C_SMBUS_READ?2:1; + int num = read_write == I2C_SMBUS_READ ? 2 : 1; struct i2c_msg msg[2] = { { addr, flags, 1, msgbuf0 }, { addr, flags | I2C_M_RD, 0, msgbuf1 } }; @@ -1782,7 +1782,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, int status; msgbuf0[0] = command; - switch(size) { + switch (size) { case I2C_SMBUS_QUICK: msg[0].len = 0; /* Special case: The read/write field is used as data */ @@ -1809,7 +1809,7 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, if (read_write == I2C_SMBUS_READ) msg[1].len = 2; else { - msg[0].len=3; + msg[0].len = 3; msgbuf0[1] = data->word & 0xff; msgbuf0[2] = data->word >> 8; } @@ -1902,26 +1902,26 @@ static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, } if (read_write == I2C_SMBUS_READ) - switch(size) { - case I2C_SMBUS_BYTE: - data->byte = msgbuf0[0]; - break; - case I2C_SMBUS_BYTE_DATA: - data->byte = msgbuf1[0]; - break; - case I2C_SMBUS_WORD_DATA: - case I2C_SMBUS_PROC_CALL: - data->word = msgbuf1[0] | (msgbuf1[1] << 8); - break; - case I2C_SMBUS_I2C_BLOCK_DATA: - for (i = 0; i < data->block[0]; i++) - data->block[i+1] = msgbuf1[i]; - break; - case I2C_SMBUS_BLOCK_DATA: - case I2C_SMBUS_BLOCK_PROC_CALL: - for (i = 0; i < msgbuf1[0] + 1; i++) - data->block[i] = msgbuf1[i]; - break; + switch (size) { + case I2C_SMBUS_BYTE: + data->byte = msgbuf0[0]; + break; + case I2C_SMBUS_BYTE_DATA: + data->byte = msgbuf1[0]; + break; + case I2C_SMBUS_WORD_DATA: + case I2C_SMBUS_PROC_CALL: + data->word = msgbuf1[0] | (msgbuf1[1] << 8); + break; + case I2C_SMBUS_I2C_BLOCK_DATA: + for (i = 0; i < data->block[0]; i++) + data->block[i+1] = msgbuf1[i]; + break; + case I2C_SMBUS_BLOCK_DATA: + case I2C_SMBUS_BLOCK_PROC_CALL: + for (i = 0; i < msgbuf1[0] + 1; i++) + data->block[i] = msgbuf1[i]; + break; } return 0; } @@ -1966,7 +1966,7 @@ s32 i2c_smbus_xfer(struct i2c_adapter *adapter, u16 addr, unsigned short flags, } rt_mutex_unlock(&adapter->bus_lock); } else - res = i2c_smbus_xfer_emulated(adapter,addr,flags,read_write, + res = i2c_smbus_xfer_emulated(adapter, addr, flags, read_write, command, protocol, data); return res; -- cgit v1.2.3