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2012-10-05i2c-mux-gpio: Update documentationJean Delvare1-0/+18
* Document the possibility to pass relative GPIO pin numbers. * Document what platform device IDs to use, so that they do not collide. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Peter Korsgaard <peter.korsgaard@barco.com>
2012-10-05i2c-viapro: Add VIA VX900 device IDJean Delvare1-1/+5
The SMBus controller in the VIA VX900 appears to be compatible with the VIA VX855, so just add the device ID. This closes kernel bug #43096. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2012-09-10i2c-i801: Add Device IDs for Intel Lynx Point-LP PCHJames Ralston1-0/+1
Add the SMBus Device IDs for the Intel Lynx Point-LP PCH. Signed-off-by: James Ralston <james.d.ralston@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2012-07-24i2c-i801: Enable IRQ for SMBus transactionsDaniel Kurtz1-3/+10
Add a new 'feature' to i2c-i801 to enable using PCI interrupts. When the feature is enabled, then an isr is installed for the device's PCI IRQ. An I2C/SMBus transaction is always terminated by one of the following interrupt sources: FAILED, BUS_ERR, DEV_ERR, or on success: INTR. When the isr fires for one of these cases, it sets the ->status variable and wakes up the waitq. The waitq then saves off the status code, and clears ->status (in preparation for some future transaction). The SMBus controller generates an INTR irq at the end of each transaction where INTREN was set in the HST_CNT register. No locking is needed around accesses to priv->status since all writes to it are serialized: it is only ever set once in the isr at the end of a transaction, and cleared while no interrupts can occur. In addition, the I2C adapter lock guarantees that entire I2C transactions for a single adapter are always serialized. For this patch, the INTREN bit is set only for SMBus block, byte and word transactions, but not for I2C reads or writes. The use of the DS (BYTE_DONE) interrupt with byte-by-byte I2C transactions is implemented in a subsequent patch. The interrupt feature has only been enabled for COUGARPOINT hardware. In addition, it is disabled if SMBus is using the SMI# interrupt. Signed-off-by: Daniel Kurtz <djkurtz@chromium.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2012-07-24i2c/writing-clients: Mention module_i2c_driver()Jean Delvare1-8/+15
Based on a previous patch from Peter Meerwald. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Peter Meerwald <p.meerwald@bct-electronic.com>
2012-07-24i2c-piix4: Support AMD auxiliary SMBus controllerAndrew Armenia1-0/+9
Some AMD chipsets, such as the SP5100, have an auxiliary SMBus controller with a second set of registers. This patch adds support for this auxiliary controller. Tested on ASUS KCMA-D8 motherboard. Signed-off-by: Andrew Armenia <andrew@asquaredlabs.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2012-05-30i2c: Split I2C_M_NOSTART support out of I2C_FUNC_PROTOCOL_MANGLINGMark Brown2-4/+14
Since there are uses for I2C_M_NOSTART which are much more sensible and standard than most of the protocol mangling functionality (the main one being gather writes to devices where something like a register address needs to be inserted before a block of data) create a new I2C_FUNC_NOSTART for this feature and update all the users to use it. Also strengthen the disrecommendation of the protocol mangling while we're at it. In the case of regmap-i2c we remove the requirement for mangling as I2C_M_NOSTART is the only mangling feature which is being used. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2012-05-12i2c: Rename last mux driver to standard patternJean Delvare1-6/+6
Update the MAINTAINERS entry and all other references accordingly. Based on an original patch by Wolfram Sang. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Peter Korsgaard <peter.korsgaard@barco.com> [wsa: fixed merge conflict due to rework in i2c_add_mux_adapter()] Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2012-03-30Documentation: remove references to /etc/modprobe.confLucas De Marchi1-1/+1
Usage of /etc/modprobe.conf file was deprecated by module-init-tools and is no longer parsed by new kmod tool. References to this file are replaced in Documentation, comments and Kconfig according to the context. There are also some references to the old /etc/modules.conf from 2.4 kernels that are being removed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi> Acked-by: Takashi Iwai <tiwai@suse.de> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Signed-off-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-03-26i2c-i801: Add device IDs for Intel Lynx PointSeth Heasley1-0/+1
Add the SMBus controller device IDs for the Intel Lynx Point PCH. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2012-03-13USB: ohci-nxp: Rename symbols from pnx4008 to nxpRoland Stigge1-3/+3
Since this driver is compatible with several NXP devices, the driver was renamed accordingly. This patch also changes the respective symbol names. Signed-off-by: Roland Stigge <stigge@antcom.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2011-11-23i2c: Fix device name for 10-bit slave addressJean Delvare1-17/+19
10-bit addresses overlap with traditional 7-bit addresses, leading in device name collisions. Add an arbitrary offset to 10-bit addresses to prevent this collision. The offset was chosen so that the address is still easily recognizable. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
2011-10-30i2c: Functions for byte-swapped smbus_write/read_word_dataJonathan Cameron1-0/+8
Reimplemented at least 17 times discounting error mangling cases where it could be used. Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-05-24i2c-i801: SMBus patch for Intel Panther Point DeviceIDsSeth Heasley1-0/+1
This patch adds the SMBus controller DeviceID for the Intel Panther Point PCH. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-05-24i2c/writing-clients: Fix foo_driver.id_tableVikram Narayanan1-1/+1
The i2c_device_id structure variable's name is not used in the i2c_driver structure. Signed-off-by: Vikram Narayanan <vikram186@gmail.com> Cc: stable@kernel.org Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-31Fix common misspellingsLucas De Marchi3-3/+3
Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
2011-03-22Merge branch 'for-linus/2639/i2c-2' of git://git.fluff.org/bjdooks/linuxLinus Torvalds1-0/+26
* 'for-linus/2639/i2c-2' of git://git.fluff.org/bjdooks/linux: i2c-pxa2xx: Don't clear isr bits too early i2c-pxa2xx: Fix register offsets i2c-pxa2xx: pass of_node from platform driver to adapter and publish i2c-pxa2xx: check timeout correctly i2c-pxa2xx: add support for shared IRQ handler i2c-pxa2xx: Add PCI support for PXA I2C controller ARM: pxa2xx: reorganize I2C files i2c-pxa2xx: use dynamic register layout i2c-mxs: set controller to pio queue mode after reset i2c-eg20t: support new device OKI SEMICONDUCTOR ML7213 IOH i2c/busses: Add support for Diolan U2C-12 USB-I2C adapter
2011-03-20i2c-i801: SMBus patch for Intel DH89xxCC DeviceIDsSeth Heasley1-1/+2
Add the SMBus Controller DeviceIDs for the Intel DH89xxCC PCH. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20i2c: Minor fixes to upgrading-clients documentJean Delvare1-9/+9
* Typical legacy drivers implemented method .detach_client, not .detach_adapter. * Drop all references to __devexit, as i2c drivers shouldn't use it. Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-03-20i2c: Fix typo in instantiating-devices documentRoman Fietze1-1/+1
The struct i2c_board_info member holding the name is "type", not "name". Signed-off-by: Roman Fietze <roman.fietze@telemotive.de> Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: stable@kernel.org
2011-01-27i2c/busses: Add support for Diolan U2C-12 USB-I2C adapterGuenter Roeck1-0/+26
This patch adds support for the Diolan U2C-12 USB-I2C adapter. It also updates MAINTAINERS to list the author as maintainer. Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-10i2c: Add generic I2C multiplexer using GPIO APIPeter Korsgaard1-0/+65
Add an i2c mux driver providing access to i2c bus segments using a hardware MUX sitting on a master bus and controlled through gpio pins. E.G. something like: ---------- ---------- Bus segment 1 - - - - - | | SCL/SDA | |-------------- | | | |------------| | | | | | Bus segment 2 | | | Linux | GPIO 1..N | MUX |--------------- Devices | |------------| | | | | | | | Bus segment M | | | |---------------| | ---------- ---------- - - - - - SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M according to the settings of the GPIO pins 1..N. Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31i2c-i801: Add PCI idents for Patsburg 'IDF' SMBus controllersDavid Woodhouse1-0/+3
These are the extra 'Integrated Device Function' SMBus controllers found on the Patsburg chipset. Mention the absence of slave mode support. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31i2c-i801: Add Intel Patsburg device IDSeth Heasley1-1/+2
Add support for the Intel Patsburg PCH SMBus Controller. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-08-11i2c: Add support for custom probe functionJean Delvare1-1/+1
The probe method used by i2c_new_probed_device() may not be suitable for all cases. Let the caller provide its own, optional probe function. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-04Documentation: update broken web addresses.Justin P. Mattock5-5/+5
Below you will find an updated version from the original series bunching all patches into one big patch updating broken web addresses that are located in Documentation/* Some of the addresses date as far far back as 1995 etc... so searching became a bit difficult, the best way to deal with these is to use web.archive.org to locate these addresses that are outdated. Now there are also some addresses pointing to .spec files some are located, but some(after searching on the companies site)where still no where to be found. In this case I just changed the address to the company site this way the users can contact the company and they can locate them for the users. Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Thomas Weber <weber@corscience.de> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Cc: Paulo Marques <pmarques@grupopie.com> Cc: Randy Dunlap <rdunlap@xenotime.net> Cc: Michael Neuling <mikey@neuling.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-06-03Documentation/i2c: Checkpatch cleanupAndrea Gelmini7-54/+54
Remove all trailing whitespace in Documentation/i2c. Signed-off-by: Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-05-21i2c-i801: Let the user disable selected driver featuresJean Delvare1-1/+7
Let the user disable selected features normally supported by the device. This makes it possible to work around possible driver or hardware bugs if the feature in question doesn't work as intended for whatever reason. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Felix Rubinstein <felixru@gmail.com>
2010-05-04i2c-core: Erase pointer to clientdata on removalWolfram Sang1-0/+5
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 <w.sang@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-02i2c: Document the message size limitZhangfei Gao1-2/+3
i2c_master_send & i2c_master_recv do not support more than 64 kb transfer, since msg.len is u16. Signed-off-by: Zhangfei Gao <zgao6@marvell.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-03-02i2c-parport-light: Add SMBus alert supportJean Delvare1-0/+11
Add support for the SMBus alert mechanism to the i2c-parport-light driver. The ADM1032 evaluation board at least is properly wired for this. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Trent Piepho <tpiepho@freescale.com>
2010-03-02i2c-parport: Add SMBus alert supportJean Delvare1-0/+3
Add support for the SMBus alert mechanism to the i2c-parport driver. The ADM1032 evaluation board at least is properly wired for this. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Trent Piepho <tpiepho@freescale.com>
2010-03-02i2c: Add SMBus alert supportJean Delvare1-0/+16
SMBus alert support. The SMBus alert protocol allows several SMBus slave devices to share a single interrupt pin on the SMBus master, while still allowing the master to know which slave triggered the interrupt. This is based on preliminary work by David Brownell. The key difference between David's implementation and mine is that his was part of i2c-core, while mine is split into a separate, standalone module named i2c-smbus. The i2c-smbus module is meant to include support for all SMBus extensions to the I2C protocol in the future. The benefit of this approach is a zero cost for I2C bus segments which do not need SMBus alert support. Where David's implementation increased the size of struct i2c_adapter by 7% (40 bytes on i386), mine doesn't touch it. Where David's implementation added over 150 lines of code to i2c-core (+10%), mine doesn't touch it. The only change that touches all the users of the i2c subsystem is a new callback in struct i2c_driver (common to both implementations.) I seem to remember Trent was worried about the footprint of David'd implementation, hopefully mine addresses the issue. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jonathan Cameron <jic23@cam.ac.uk> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Trent Piepho <tpiepho@freescale.com>
2010-03-02i2c-i801: Add Intel Cougar Point device IDsSeth Heasley1-1/+2
Add the Intel Cougar Point (PCH) SMBus controller device IDs. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-14i2c: Get rid of struct i2c_client_address_dataJean Delvare1-1/+1
Struct i2c_client_address_data only contains one field at this point, which makes its usefulness questionable. Get rid of it and pass simple address lists around instead. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Wolfram Sang <w.sang@pengutronix.de>
2009-12-06i2c-stub: Documentation updateJean Delvare1-2/+2
There is nothing sensors-specific to i2c-stub. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-06i2c-stub: Allow user to disable some commandsJean Delvare1-0/+6
Add a module parameter to override the functionality bitfield. This lets the user disable some commands. This can be used to force a chip driver to take different code paths. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-06i2c-stub: Implement I2C block supportJean Delvare1-3/+3
This is required to test some drivers, for example at24. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-06i2c: Drop probe, ignore and force module parametersJean Delvare1-0/+44
The legacy probe and force module parameters are obsolete now, the same can be achieved using the new_device sysfs interface, which is both more flexible and cheaper (it is implemented by i2c-core rather than replicated in every driver module.) The legacy ignore module parameters can be dropped as well. Ignoring can be done by instantiating a "dummy" device at the problematic address. This is the first step of a huge cleanup to i2c-core's i2c_detect function, i2c.h's I2C_CLIENT_INSMOD* macros, and all drivers that made use of them. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-12-06i2c-voodoo3: DeleteJean Delvare1-62/+0
Superseded by tdfxfb. I2C/DDC support used to live in a separate driver but this caused driver conflicts. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Krzysztof Helt <krzysztof.h1@wp.pl>
2009-11-07i2c-piix4: Modify code name SB900 to Hudson-2Crane Cai1-1/+1
Change SB900 to its formal code name Hudson-2. Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-10-04i2c: Minor documentation updateJean Delvare1-1/+1
The sysfs path to i2c adapters has changed recently, update the documentation to reflect that change. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-10-04i2c: Move misc devices documentationJean Delvare2-204/+0
Some times ago the eeprom and max6875 drivers moved to drivers/misc/eeprom, but their documentation did not follow. It's finally time to get rid of Documentation/i2c/chips. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Ben Gardner <gardner.ben@gmail.com> Acked-by: Wolfram Sang <w.sang@pengutronix.de>
2009-09-18i2c-piix4: Add AMD SB900 SMBus device IDCrane Cai1-0/+2
Add new SMBus device ID for AMD SB900. Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-09-18i2c/chips: Remove deprecated pcf8574 driverWolfram Sang1-65/+0
The pcf8574 driver in drivers/i2c/chips which just exports its register to sysfs is superseded by drivers/gpio/pcf857x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-09-18i2c/chips: Remove deprecated pca9539 driverWolfram Sang1-58/+0
The pca9539 driver in drivers/i2c/chips which just exports its registers to sysfs is superseded by drivers/gpio/pca953x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Ben Gardner <gardner.ben@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-09-18i2c/chips: Remove deprecated pcf8575 driverWolfram Sang1-69/+0
The pcf8575 driver in drivers/i2c/chips which just exports its register to sysfs is superseded by drivers/gpio/pcf857x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Bart Van Assche <bart.vanassche@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2009-06-19i2c: Add a sysfs interface to instantiate devicesJean Delvare1-0/+44
Add a sysfs interface to instantiate and delete I2C devices. This is primarily a replacement of the force_* module parameters implemented by some i2c drivers. These module parameters were implemented internally by the I2C_CLIENT_INSMOD* macros, which don't scale well. This can also be used when developing a driver on a self-soldered board which doesn't yet have proper I2C device declaration at the platform level, and presumably for various debugging situations. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <dbrownell@users.sourceforge.net>
2009-06-19i2c: Get rid of the legacy binding modelJean Delvare1-13/+3
We converted all the legacy i2c drivers so we can finally get rid of the legacy binding model. Hooray! Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <dbrownell@users.sourceforge.net>
2009-06-15i2c-viapro: Add new PCI device ID for VX855Harald Welte1-0/+4
The south bridge of the VIA VX855 chipset has a different PCI Device ID so i2c-viapro.c needs to be updated with this. Signed-off-by: Harald Welte <HaraldWelte@viatech.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
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