path: root/Documentation/i2c
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2015-02-19i2c: fix reference to functionality constants definitionBaruch Siach1-1/+1
Since commit 607ca46e97 ('UAPI: (Scripted) Disintegrate include/linux') the list of functionality constants moved to include/uapi/linux/i2c.h. Update the reference accordingly. Fixes: 607ca46e97 ('UAPI: (Scripted) Disintegrate include/linux') Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-12-04Documentation: i2c: Use PM ops instead of legacy suspend/resumeLars-Peter Clausen2-8/+6
New drivers should use PM ops instead of the legacy suspend/resume callbacks. Update the I2C device driver guides to reflect this. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-11-12i2c: i801: Add DeviceIDs for SunrisePoint LPDevin Ryles1-0/+1
Signed-off-by: Devin Ryles <devin.ryles@intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-10-16i2c: i801: Add Device IDs for Intel Sunrise Point PCHjames.d.ralston@intel.com1-0/+1
This patch adds the I2C/SMBus Device IDs for the Intel Sunrise Point PCH. Signed-off-by: James Ralston <james.d.ralston@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-09-07Documentation: i2c: rename variable "register" to "reg"Jose Manuel Alarcon Roldan1-5/+5
The example code provided with the i2c device interface documentation won't compile since it uses the reserved word "register" to name a variable. The compiler fails with this error message: error: expected identifier or '(' before '=' token __u8 register = 0x20; /* Device register to access */ ^ Rename the variable "register" to simply "reg" in the example code. Another couple of typos has been fixed as well. [Change "! =" to "!=".] Signed-off-by: Jose Alarcon Roldan <jose.alarcon.roldan@gmail.com> Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2014-07-17i2c: i801: Add device ID for Intel Wildcat Point PCHJean Delvare1-0/+1
Signed-off-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-07-17i2c: stub: Add support for banked register rangesJean Delvare1-4/+7
Some chips implement banked register ranges. This allows implementing more registers than the limited 8-bit address space originally allows. In order to access a register on these chips, you must first select the proper bank. Add support for this mechanism to the i2c-stub driver so that such chips can be emulated. All the bank settings are passed as module parameters. Signed-off-by: Jean Delvare <jdelvare@suse.de> Tested-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-07-17i2c: stub: Add support for SMBus block commandsGuenter Roeck1-2/+10
SMBus block commands are different to I2C block commands since the returned data is not normally accessible with byte or word commands on other command offsets. Add linked list of 'block' commands to support those commands. Access mechanism is quite simple: Block commands must be written before they can be read. Subsequent writes can be partial. Block read commands always return the number of bytes associated with the longest previous write. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-04-06Documentation: i2c: improve section about flags mangling the protocolWolfram Sang1-15/+20
Sort the entries alphabetically. Make the introductory paragraph more precise. Skip useless 'Flag' introduction from the entries. Remove trailing white spaces from the file. Add missing I2C_M_STOP entry. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-03-12i2c: Spelling s/than/that/Geert Uytterhoeven1-1/+1
Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-03-09i2c: i801: enable Intel BayTrail SMBUSChew, Kean ho1-0/+1
Add Device ID of Intel BayTrail SMBus Controller. Signed-off-by: Chew, Kean ho <kean.ho.chew@intel.com> Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-02-15Documentation: i2c: mention ACPI method for instantiating devicesWolfram Sang1-0/+7
Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Guenter Roeck <linux@roeck-us.net>
2014-02-15Documentation: i2c: describe devicetree method for instantiating devicesWolfram Sang1-2/+32
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2014-01-29Merge branch 'i2c/for-current' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull more i2c updates from Wolfram Sang: "Mostly bugfixes, small but wanted cleanups, and Paul's init.h removal applied" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: i2c: rcar: fix NACK error code i2c: update i2c_algorithm documentation i2c: rcar: use devm_clk_get to ensure clock is properly ref-counted i2c: rcar: do not print error if device nacks transfer i2c: rely on driver core when sanitizing devices i2c: delete non-required instances of include <linux/init.h> i2c: acorn: is tristate and should use module.h i2c: piix4: Standardize log messages i2c: piix4: Use different message for AMD Auxiliary SMBus Controller i2c: piix4: Add support for AMD ML and CZ SMBus changes
2014-01-29Merge branch 'hwmon-for-linus' of ↵Linus Torvalds5-5/+5
git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging Pull hwmon updates from Jean Delvare: "This include it87 driver improvements, and a tree-wide change of my e-mail address" * 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: Update Jean Delvare's e-mail address hwmon: (it87) Print proper names for the IT8771E and IT8772E hwmon: (it87) Add support for the ITE IT8603E
2014-01-29Update Jean Delvare's e-mail addressJean Delvare5-5/+5
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2014-01-24i2c: piix4: Add support for AMD ML and CZ SMBus changesShane Huang1-1/+1
The locations of SMBus register base address and enablement bit are changed from AMD ML, which need this patch to be supported. Signed-off-by: Shane Huang <shane.huang@amd.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@vger.kernel.org
2014-01-09Documentation: i2c: Remove obsolete exampleHelia Correia1-3/+0
Documentation/i2c/fault-codes illustrates EINVAL error code as follows: "One example would be a driver trying an SMBus Block Write with block size outside the range of 1-32 bytes." However, the actual implementation of i2c subsystem truncates data length to be 32 bytes. Hence this example cannot happen anymore, and since it's obsolete, let's simply remove it from Documentation/i2c/fault-codes. Signed-off-by: Helia Correia <helia.correia@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-11-14i2c: i801: Add Device IDs for Intel Wildcat Point-LP PCHJames Ralston1-0/+1
This patch adds the SMBus Device IDs for the Intel Wildcat Point-LP PCH. Signed-off-by: James Ralston <james.d.ralston@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-09-06Merge branch 'for-linus' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial Pull trivial tree from Jiri Kosina: "The usual trivial updates all over the tree -- mostly typo fixes and documentation updates" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (52 commits) doc: Documentation/cputopology.txt fix typo treewide: Convert retrun typos to return Fix comment typo for init_cma_reserved_pageblock Documentation/trace: Correcting and extending tracepoint documentation mm/hotplug: fix a typo in Documentation/memory-hotplug.txt power: Documentation: Update s2ram link doc: fix a typo in Documentation/00-INDEX Documentation/printk-formats.txt: No casts needed for u64/s64 doc: Fix typo "is is" in Documentations treewide: Fix printks with 0x%# zram: doc fixes Documentation/kmemcheck: update kmemcheck documentation doc: documentation/hwspinlock.txt fix typo PM / Hibernate: add section for resume options doc: filesystems : Fix typo in Documentations/filesystems scsi/megaraid fixed several typos in comments ppc: init_32: Fix error typo "CONFIG_START_KERNEL" treewide: Add __GFP_NOWARN to k.alloc calls with v.alloc fallbacks page_isolation: Fix a comment typo in test_pages_isolated() doc: fix a typo about irq affinity ...
2013-08-19Documentation: i2c: Fix example in instantiating-devicesSachin Kamat1-1/+1
__initdata should be placed between the variable name and equal sign for the variable to be placed in the intended section. Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-08-15i2c: piix4: Add support for secondary SMBus on AMD SB800 and AMD FCH chipsetsRudolf Marek1-3/+4
Add support for the secondary SMBus controller on the AMD SB800 and AMD FCH chipsets. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Tested-by: Paul Menzel <paulepanter@users.sourceforge.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-07-25doc: Fix typo in doucmentationsMasanari Iida1-2/+2
Correct typo (double words) in documentations. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Acked-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2013-07-04Merge branch 'i2c/for-next' of ↵Linus Torvalds1-0/+1
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: - new drivers: Kontron PLD, Wondermedia VT - mv64xxx driver gained sun4i support and a bigger cleanup - duplicate driver 'intel-mid' removed - added generic device tree binding for sda holding time (and designware driver already uses it) - we tried to allow driver probing with only device tree and no i2c ids, but I had to revert it because of side effects. Needs some rethinking. - driver bugfixes, cleanups... * 'i2c/for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (34 commits) i2c-designware: use div_u64 to fix link i2c: Kontron PLD i2c bus driver i2c: iop3xxx: fix build failure after waitqueue changes i2c-designware: make SDA hold time configurable i2c: mv64xxx: Set bus frequency to 100kHz if clock-frequency is not provided i2c: imx: allow autoloading on dt ids i2c: mv64xxx: Fix transfer error code i2c: i801: SMBus patch for Intel Coleto Creek DeviceIDs i2c: omap: correct usage of the interrupt enable register i2c-pxa: prepare clock before use Revert "i2c: core: make it possible to match a pure device tree driver" i2c: nomadik: allocate adapter number dynamically i2c: nomadik: support elder Nomadiks i2c: mv64xxx: Add Allwinner sun4i compatible i2c: mv64xxx: make the registers offset configurable i2c: mv64xxx: Add macros to access parts of registers i2c: vt8500: Add support for I2C bus on Wondermedia SoCs i2c: designware: fix race between subsequent xfers i2c: bfin-twi: Read and write the FIFO in loop i2c: core: make it possible to match a pure device tree driver ...
2013-06-20i2c: i801: SMBus patch for Intel Coleto Creek DeviceIDsSeth Heasley1-0/+1
This patch adds the i801 SMBus Controller DeviceIDs for the Intel Coleto Creek PCH. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-06-03i2c-piix4: Add AMD CZ SMBus device IDShane Huang1-1/+1
To add AMD CZ SMBus controller device ID. [bhelgaas: drop pci_ids.h update] Signed-off-by: Shane Huang <shane.huang@amd.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Tejun Heo <tj@kernel.org> Reviewed-by: Jean Delvare <khali@linux-fr.org> Cc: stable@vger.kernel.org
2013-03-22i2c: Fix my e-mail address in drivers and documentationGuenter Roeck1-1/+1
My old e-mail address is no longer working. Signed-off-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2013-02-15i2c: i801: Add Device IDs for Intel Wellsburg PCHJames Ralston1-0/+1
This patch adds the SMBus Device IDs for the Intel Wellsburg PCH Signed-off-by: James Ralston <james.d.ralston@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-11i2c: sis630: Add SIS964 supportAmaury Decrême1-0/+9
Signed-off-by: Amaury Decrême <amaury.decreme@gmail.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-10i2c: Adding support for Intel iSMT SMBus 2.0 host controllerNeil Horman1-0/+36
The iSMT (Intel SMBus Message Transport) supports multi-master I2C/SMBus, as well as IPMI. It's operation is DMA-based and utilizes descriptors to initiate transactions on the bus. The iSMT hardware can act as both a master and a target, although this driver only supports being a master. Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Bill Brown <bill.e.brown@intel.com> Tested-by: Seth Heasley <seth.heasley@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <wolfram@the-dreams.de>
2013-02-08i2c: i801: SMBus patch for Intel Avoton DeviceIDsSeth Heasley1-0/+1
This patch adds the PCU SMBus DeviceID for the Intel Avoton SOC. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Reviewed-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-28i2c: core: Remove definition of i2c_smbus_process_callTushar Behera2-4/+4
i2c_smbus_process_call has no users in the kernel, so this can be removed. Documentation for the same has been updated accordingly. Fixes following sparse warning. drivers/i2c/i2c-core.c:1871:5: warning: symbol 'i2c_smbus_process_call' was not declared. Should it be static? [wsa: updated the documentation] Signed-off-by: Tushar Behera <tushar.behera@linaro.org> Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
2013-01-03Documentation: remove __dev* attributes.Greg Kroah-Hartman1-1/+1
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from the kernel documentation. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2012-12-16i2c: Mention functionality flags in SMBus protocol documentationJean Delvare1-9/+31
While the mapping between I2C adapter functionality flags and i2c_smbus_*() helper functions is rather obvious, let's still document it for clarity. Also drop the reference to 2 command byte I2C block reads, there is no support for that in the kernel at the moment. Signed-off-by: Jean Delvare <khali@linux-fr.org>
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>

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