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path: root/include/linux/i2c.h
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* i2c: Add info->archdata fieldAnton Vorontsov2008-10-22
| | | | | | | | If present the info->archdata is copied into the dev->archdata. Some (OpenFirmware) platforms need it. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Clean up <linux/i2c.h>Jean Delvare2008-10-22
| | | | | | | | | | | Fix most checkpatch.pl errors and warnings. This includes replacing spaces with tabs in many places, adding and removing spaces, and folding long lines. Also complete a couple prototypes to make it clearer what the parameters represent. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Drop 2-byte address block transfer definesJean Delvare2008-10-22
| | | | | | | We have no users and no implementers for these transfer types so it makes little sense to define functionality bits for them. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Constify i2c_get_clientdata's parameterJean Delvare2008-10-22
| | | | | | | i2c_get_clientdata doesn't change the i2c_client it is passed as a parameter, so it can be constified. Same for i2c_get_adapdata. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Make clear what the class field of i2c_adapter is good forWolfram Sang2008-10-22
| | | | | | | Make clear what the class field of i2c_adapter is good for. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Add missing kerneldoc descriptionsJean Delvare2008-08-28
| | | | | | | | Add missing kernel descriptions of struct i2c_driver members. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Cc: David Brownell <david-b@pacbell.net>
* i2c: Add detection capability to new-style driversJean Delvare2008-07-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a mechanism to let new-style i2c drivers optionally autodetect devices they would support on selected buses and ask i2c-core to instantiate them. This is a replacement for legacy i2c drivers, much cleaner. Where drivers had to implement both a legacy i2c_driver and a new-style i2c_driver so far, this mechanism makes it possible to get rid of the legacy i2c_driver and implement both enumerated and detected device support with just one (new-style) i2c_driver. Here is a quick conversion guide for these drivers, step by step: * Delete the legacy driver definition, registration and removal. Delete the attach_adapter and detach_client methods of the legacy driver. * Change the prototype of the legacy detect function from static int foo_detect(struct i2c_adapter *adapter, int address, int kind); to static int foo_detect(struct i2c_client *client, int kind, struct i2c_board_info *info); * Set the new-style driver detect callback to this new function, and set its address_data to &addr_data (addr_data is generally provided by I2C_CLIENT_INSMOD.) * Add the appropriate class to the new-style driver. This is typically the class the legacy attach_adapter method was checking for. Class checking is now mandatory (done by i2c-core.) See <linux/i2c.h> for the list of available classes. * Remove the i2c_client allocation and freeing from the detect function. A pre-allocated client is now handed to you by i2c-core, and is freed automatically. * Make the detect function fill the type field of the i2c_board_info structure it was passed as a parameter, and return 0, on success. If the detection fails, return -ENODEV. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Export the i2c_bus_type symbolJon Smirl2008-07-14
| | | | | | | | Export the root of the i2c bus so that PowerPC device tree code can iterate over devices on the i2c bus. Signed-off-by: Jon Smirl <jonsmirl@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Let bus drivers add SPD to their classJean Delvare2008-07-14
| | | | | | | | | | | | | | | | | | Let general purpose I2C/SMBus bus drivers add SPD to their class. Once this is done, we will be able to tell the eeprom driver to only probe for SPD EEPROMs and similar on these buses. Note that I took a conservative approach here, adding I2C_CLASS_SPD to many drivers that have no idea whether they can host SPD EEPROMs or not. This is to make sure that the eeprom driver doesn't stop probing buses where SPD EEPROMs or equivalent live. So, bus driver maintainers and users should feel free to remove the SPD class from drivers those buses never have SPD EEPROMs or they don't want the eeprom driver to bind to them. Likewise, feel free to add the SPD class to any bus driver I might have missed. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Let framebuffer drivers set their I2C bus class to DDCJean Delvare2008-07-14
| | | | | | | | Let framebuffer drivers set their I2C bus class to DDC. Once this is done, we will be able to tell the eeprom driver to only probe for EDID EEPROMs on these buses. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Update stray references to smbus_accessJean Delvare2008-07-14
| | | | | | That function is actually named i2c_smbus_xfer. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Delete unused function i2c_smbus_write_quickJean Delvare2008-07-14
| | | | | | | | | Function i2c_smbus_write_quick has no users left, so we can delete it. Also update the list of these helper functions which are gone but could be added back if needed. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Fix bad hint about irqs in i2c.hWolfram Sang2008-07-01
| | | | | | | | | | i2c.h mentions -1 as a not-issued irq. This false hint was taken by of_i2c and caused crashes. Don't give any advice as 'no irq' is not consistent across all architectures yet and it is not needed internally by the i2c-core. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Kill the old driver matching schemeJean Delvare2008-05-18
| | | | | | | Remove the old driver_name/type scheme for i2c driver matching. Only the standard aliasing model will be used from now on. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Match dummy devices by typeJean Delvare2008-05-11
| | | | | | | | | | | | As the old driver_name/type matching scheme is going away soon, change the dummy device mechanism to use the new matching scheme. This has the downside that dummy i2c clients can no longer choose their name, they'll all appear as "dummy" in sysfs and in log messages. I don't think it is a problem in practice though, as there is little reason to use these i2c clients to log messages. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Convert most new-style drivers to use module aliasingJean Delvare2008-04-29
| | | | | | | | | | | | | | Based on earlier work by Jon Smirl and Jochen Friedrich. Update most new-style i2c drivers to use standard module aliasing instead of the old driver_name/type driver matching scheme. I've left the video drivers apart (except for SoC camera drivers) as they're a bit more diffcult to deal with, they'll have their own patch later. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Jon Smirl <jonsmirl@gmail.com> Cc: Jochen Friedrich <jochen@scram.de>
* i2c: Add support for device alias namesJean Delvare2008-04-29
| | | | | | | | | | | | | | Based on earlier work by Jon Smirl and Jochen Friedrich. This patch allows new-style i2c chip drivers to have alias names using the official kernel aliasing system and MODULE_DEVICE_TABLE(). At this point, the old i2c driver binding scheme (driver_name/type) is still supported. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Jochen Friedrich <jochen@scram.de> Cc: Jon Smirl <jonsmirl@gmail.com> Cc: Kay Sievers <kay.sievers@vrfy.org>
* i2c: Make i2c_register_board_info() a NOP when CONFIG_I2C_BOARDINFO=nDavid Brownell2008-02-24
| | | | | | | | | | Don't require platform code to be #ifdeffed according to whether I2C is enabled or not ... if it's not enabled, let GCC compile out all I2C device declarations. (Issue noted on an NSLU2 build that didn't configure I2C.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Storage class should be before const qualifierTobias Klauser2008-02-24
| | | | | | | | | | | The C99 specification states in section 6.11.5: The placement of a storage-class specifier other than at the beginning of the declaration specifiers in a declaration is an obsolescent feature. Signed-off-by: Tobias Klauser <tklauser@distanz.ch> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Add i2c_new_dummy() utilityDavid Brownell2008-01-27
| | | | | | | | | This adds a i2c_new_dummy() primitive to help work with devices that consume multiple addresses, which include many I2C eeproms and at least one RTC. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Stop using the redundant client listDavid Brownell2008-01-27
| | | | | | | | | | | | | | | | | | | | | | | | | The i2c_adapter.clients list of i2c_client nodes duplicates driver model state. This patch starts removing that list, letting us remove most existing users of those i2c-core lists. * The core I2C code now iterates over the driver model's list instead of the i2c-internal one in some places where it's safe: - Passing a command/ioctl to each client, a mechanims used almost exclusively by DVB adapters; - Device address checking, in both i2c-core and i2c-dev. * Provide i2c_verify_client() to use with driver model iterators. * Flag the relevant i2c_adapter and i2c_client fields as deprecated, to help prevent new users from appearing. For the moment the list needs to stick around, since some issues show up when deleting devices created by legacy I2C drivers. (They don't follow standard driver model rules. Removing those devices can cause self-deadlocks.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Drop redundant i2c_driver.listJean Delvare2008-01-27
| | | | | | | | i2c_driver.list is superfluous, this list duplicates the one maintained by the driver core. Drop it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: David Brownell <dbrownell@users.sourceforge.net>
* i2c: Drop redundant i2c_adapter.listJean Delvare2008-01-27
| | | | | | | | i2c_adapter.list is superfluous, this list duplicates the one maintained by the driver core. Drop it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: David Brownell <dbrownell@users.sourceforge.net>
* i2c: Change prototypes of refcounting functionsJean Delvare2008-01-27
| | | | | | | | | | Use more standard prototypes for i2c_use_client() and i2c_release_client(). The former now returns a pointer to the client, and the latter no longer returns anything. This matches what all other subsystems do. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <david-b@pacbell.net>
* i2c: Use the driver model reference countingJean Delvare2008-01-27
| | | | | | | | Don't implement our own reference counting mechanism for i2c clients when the driver model already has one. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <david-b@pacbell.net>
* i2c: Constify client address dataMark M. Hoffman2008-01-27
| | | | | | | | This patch allows much of the I2C client address data to move from initdata into text. Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Make i2c_check_addr staticJean Delvare2007-11-15
| | | | | | | i2c_check_addr is only used inside i2c-core now, so we can make it static and stop exporting it. Thanks to David Brownell for noticing. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Rename the PEC functionality bitDavid Brownell2007-10-13
| | | | | | | | | | | | Rename I2C_FUNC_SMBUS_HWPEC_CALC as I2C_FUNC_SMBUS_PEC, and list that functionality as always available through the software implementation. Update documentation accordingly (and list similar requirements). The way it's currently packaged doesn't present the capability in a useful way. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Move i2c-dev interfaces to i2c-dev.hDavid Brownell2007-10-13
| | | | | | | | | | Move the i2c-dev support into <linux/i2c-dev.h> where it should always have lived. Now <linux/i2c.h> no longer holds stuff related to the optional userspace /dev/i2c-X interface. Improve the descriptions for these ioctl requests. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Remove i2c_algorithm.algo_control()David Brownell2007-10-13
| | | | | | | | | | | | | | | | | | This removes: - An effectively unused hook: i2c_algorithm.algo_control. - The i2c_control() call, used only by i2c-dev to call that unused hook or set two barely supported adapter params. (That param setting moves into i2c-dev.c ... still iffy due to lack of locking, but no other changes.) As shown by diffstat, this is a net code shrink. It also reduces the complexity of the I2C adapter and /dev interfaces. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Document struct i2c_msgDavid Brownell2007-10-13
| | | | | | | | | | | Clarify use of the I2C_M_* flags by highlighting the fact that most of them depend on I2C_FUNC_PROTOCOL_MANGLING. Also provide kerneldoc for i2c_smbus_read_block_data() and also for "struct i2c_msg". Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c-core: Make some code staticAdrian Bunk2007-10-13
| | | | | | | After the i2c-isa removal some code can become static. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: New-style devices can support driver model wakeup flagsDavid Brownell2007-10-13
| | | | | | | | | | We need to be able to flag I2C devices, such as RTCs, which can issue wake events (usually through IRQ lines). This adds an i2c_board_info.flags bit, and uses it to initialize the i2c device node. (And shrinks a few lines that were overly long.) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c.h kernel-doc additionsRandy Dunlap2007-07-31
| | | | | | | | | | | | | | Add kernel-doc notation in <linux/i2c.h> for: Warning(linux-2.6.22-git12//include/linux/i2c.h:183): No description found for parameter 'driver' Warning(linux-2.6.22-git12//include/linux/i2c.h:183): No description found for parameter 'usage_count' Warning(linux-2.6.22-git12//include/linux/i2c.h:183): No description found for parameter 'list' Warning(linux-2.6.22-git12//include/linux/i2c.h:183): No description found for parameter 'released' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6Linus Torvalds2007-07-19
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6: (44 commits) i2c: Delete the i2c-isa pseudo bus driver hwmon: refuse to load abituguru driver on non-Abit boards hwmon: fix Abit Uguru3 driver detection on some motherboards hwmon/w83627ehf: Be quiet when no chip is found hwmon/w83627ehf: No need to initialize fan_min hwmon/w83627ehf: Export the thermal sensor types hwmon/w83627ehf: Enable VBAT monitoring hwmon/w83627ehf: Add support for the VID inputs hwmon/w83627ehf: Fix timing issues hwmon/w83627ehf: Add error messages for two error cases hwmon/w83627ehf: Convert to a platform driver hwmon/w83627ehf: Update the Kconfig entry make coretemp_device_remove() static hwmon: Add LM93 support hwmon: Improve the pwmN_enable documentation hwmon/smsc47b397: Don't report missing fans as spinning at 82 RPM hwmon: Add support for newer uGuru's hwmon/f71805f: Add temperature-tracking fan control mode hwmon/w83627ehf: Preserve speed reading when changing fan min hwmon: fix detection of abituguru volt inputs ... Manual fixup of trivial conflict in MAINTAINERS file
| * i2c: Delete the i2c-isa pseudo bus driverJean Delvare2007-07-19
| | | | | | | | | | | | There are no users of i2c-isa left, so we can finally get rid of it. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* | i2c: Fix the i2c_smbus_read_i2c_block_data() prototypeJean Delvare2007-07-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Let the drivers specify how many bytes they want to read with i2c_smbus_read_i2c_block_data(). So far, the block count was hard-coded to I2C_SMBUS_BLOCK_MAX (32), which did not make much sense. Many driver authors complained about this before, and I believe it's about time to fix it. Right now, authors have to do technically stupid things, such as individual byte reads or full-fledged I2C messaging, to work around the problem. We do not want to encourage that. I even found that some bus drivers (e.g. i2c-amd8111) already implemented I2C block read the "right" way, that is, they didn't follow the old, broken standard. The fact that it was never noticed before just shows how little i2c_smbus_read_i2c_block_data() was used, which isn't that surprising given how broken its prototype was so far. There are some obvious compatiblity considerations: * This changes the i2c_smbus_read_i2c_block_data() prototype. Users outside the kernel tree will notice at compilation time, and will have to update their code. * User-space has access to i2c_smbus_xfer() directly using i2c-dev, so the changed expectations would affect tools such as i2cdump. In order to preserve binary compatibility, we give I2C_SMBUS_I2C_BLOCK_DATA a new numeric value, and define I2C_SMBUS_I2C_BLOCK_BROKEN with the old numeric value. When i2c-dev receives a transaction with the old value, it can convert it to the new format on the fly. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* | i2c: Fix sparse warning in i2c.hMark M. Hoffman2007-07-12
| | | | | | | | | | | | | | Kill a sparse warning by un-nesting two container_of() calls. Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* | i2c: Add kernel documentationDavid Brownell2007-07-12
|/ | | | | | | | | | | Generate I2C kerneldoc; fix various glitches and add "context" sections to that documentation. Most I2C and SMBus functions still have no kerneldoc. Let me suggest providing kerneldoc for all the i2c_smbus_*() functions as a small and mostly self-contained project for anyone so inclined. :) Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Restore i2c_smbus_read_block_dataJean Delvare2007-05-01
| | | | | | | Add back the i2c_smbus_read_block_data helper function, it is needed by the upcoming lm93 hardware monitoring driver and possibly others. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Make i2c_del_driver a void functionJean Delvare2007-05-01
| | | | | | | | | Make i2c_del_driver a void function, like all other driver removal functions. It always returned 0 even when errors occured, and nobody ever actually checked the return value anyway. And we cannot fail a module removal anyway. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Move i2c-isa-only exported symbol declarationsJean Delvare2007-05-01
| | | | | | | | Move the declaration of i2c-isa-only exported symbols to i2c-isa itself, that's the best way to ensure nobody will attempt to use them. Hopefully we'll get rid of the exports themselves soon anyway. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Add i2c_new_probed_device()Jean Delvare2007-05-01
| | | | | | | | | | | | | | | | Add a new helper function to instantiate an i2c device. It is meant as a replacement for i2c_new_device() when you don't know for sure at which address your I2C/SMBus device lives. This happens frequently on TV adapters for example, you know there is a tuner chip on the bus, but depending on the exact board model and revision, it can live at different addresses. So, the new i2c_new_probed_device() function will probe the bus according to a list of addresses, and as soon as one of these addresses responds, it will call i2c_new_device() on that one address. This function will make it possible to port the old i2c drivers to the new model quickly. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Add i2c_add_numbered_adapter()David Brownell2007-05-01
| | | | | | | | | | | | | | | This adds a call, i2c_add_numbered_adapter(), registering an I2C adapter with a specific bus number and then creating I2C device nodes for any pre-declared devices on that bus. It builds on previous patches adding I2C probe() and remove() support, and that pre-declaration of devices. This completes the core support for "new style" I2C device drivers. Those follow the standard driver model for binding devices to drivers (using probe and remove methods) rather than a legacy model (where the driver tries to autoconfigure each bus, and registers devices itself). Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Add i2c_board_info and i2c_new_device()David Brownell2007-05-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This provides partial support for new-style I2C driver binding. It builds on "struct i2c_board_info" declarations that identify I2C devices on a given board. This is needed on systems with I2C devices that can't be fully probed and/or autoconfigured, such as many embedded Linux configurations where the way a given I2C device is wired may affect how it must be used. There are two models for declaring such devices: * LATE -- using a public function i2c_new_device(). This lets modules declare I2C devices found *AFTER* a given I2C adapter becomes available. For example, a PCI card could create adapters giving access to utility chips on that card, and this would be used to associate those chips with those adapters. * EARLY -- from arch_initcall() level code, using a non-exported function i2c_register_board_info(). This copies the declarations *BEFORE* such an i2c_adapter becomes available, arranging that i2c_new_device() will be called later when i2c-core registers the relevant i2c_adapter. For example, arch/.../.../board-*.c files would declare the I2C devices along with their platform data, and I2C devices would behave much like PNPACPI devices. (That is, both enumerate from board-specific tables.) To match the exported i2c_new_device(), the previously-private function i2c_unregister_device() is now exported. Pending later patches using these new APIs, this is effectively a NOP. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: i2c stack can remove()David Brownell2007-05-01
| | | | | | | | | | | More update for new style driver support: add a remove() method, and use it in the relevant code paths. Again, nothing will use this yet since there's nothing to create devices feeding this infrastructure. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: i2c stack can probe()David Brownell2007-05-01
| | | | | | | | | | | | | | | | | | | | | | | One of a series of I2C infrastructure updates to support enumeration using the standard Linux driver model. This patch updates probe() and associated hotplug/coldplug support, but not remove(). Nothing yet _uses_ it to create I2C devices, so those hotplug/coldplug mechanisms will be the only externally visible change. This patch will be an overall NOP since the I2C stack doesn't yet create clients/devices except as part of binding them to legacy drivers. Some code is moved earlier in the source code, helping group more of the per-device infrastructure in one place and simplifying handling per-device attributes. Terminology being adopted: "legacy drivers" create devices (i2c_client) themselves, while "new style" ones follow the driver model (the i2c_client is handed to the probe routine). It's an either/or thing; the two models don't mix, and drivers that try mixing them won't even be registered. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Emulate SMBus block read over I2CJean Delvare2007-05-01
| | | | | | | | | | Let the I2C bus drivers emulate the SMBus Block Read and Block Process Call transactions if they wish. This requires to define a new message flag, which i2c-core will use to let the underlying I2C bus driver know that the first received byte will specify the length of the read message. Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Rename dev_to_i2c_adapter()David Brownell2007-05-01
| | | | | | | | | Rename dev_to_i2c_adapter() as to_i2c_adapter(), since the previous syntax was a surprising and needless difference from normal naming conventions in Linux. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* i2c: Shrink struct i2c_clientDavid Brownell2007-05-01
| | | | | | | | | | | | | | | | | | | | | | This shrinks the size of "struct i2c_client" by 40 bytes: - Substantially shrinks the string used to identify the chip type - The "flags" don't need to be so big - Removes some internal padding It also adds kerneldoc for that struct, explaining how "name" is really a chip type identifier; it's otherwise potentially confusing. Because the I2C_NAME_SIZE symbol was abused for both i2c_client.name and for i2c_adapter.name, this needed to affect i2c_adapter too. The adapters which used that symbol now use the more-obviously-correct idiom of taking the size of that field. JD: Shorten i2c_adapter.name from 50 to 48 bytes while we're here, to avoid wasting space in padding. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
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