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* Doc: i2c: Fix typo in Documentation/i2cMasanari Iida2016-02-102-3/+3
| | | | | | | This path fix spelling typos found in Documentation/i2c. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
* i2c: i801: add Intel Lewisburg device IDsAlexandra Yates2015-11-201-0/+1
| | | | | | | | Adding Intel codename Lewisburg platform device IDs for SMBus. Signed-off-by: Alexandra Yates <alexandra.yates@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* i2c: i801: Document Intel DNV and BroxtonJarkko Nikula2015-10-261-0/+2
| | | | | | | | | | | Add missing entries into i2c-i801 documentation and Kconfig about recently added Intel DNV and Broxton. Reported-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* i2c: support 10 bit and slave addresses in sysfs 'new_device'Wolfram Sang2015-08-242-3/+10
| | | | | | | | | | We now have seperate address spaces for 10 bit and we-are-slave clients. Update the sysfs device instantiation method to support these types by accepting the address offsets that are assigned to the extra address spaces. Update the documentation, too. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* i2c: parport: Add VCT-jig adapterOndrej Zary2015-08-101-0/+1
| | | | | | | | | | | Add support for VCT-jig parallel port I2C adapter to i2c-parport. The adapter schematic can be found here (in the RAR file): http://remont-aud.net/shop/22/desc/vct-jig-komplekt-dlja-samostojatelnoj-sborki Signed-off-by: Ondrej Zary <linux@rainbow-software.org> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* Merge branch 'i2c/for-4.2' of ↵Linus Torvalds2015-06-261-10/+15
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "Highlights: - new drivers for Mediatek I2C, APM X-Gene, Broadcom Settop - major updates to at91, davinci - bugfixes to the mux infrastructure when dealing with the new quirk mechanism - more users for the bus recovery feature - further improvements to the slave framework Plus the usual bunch of smaller driver and core improvements and fixes. There is one patch removing old code from an ARM platform. This has been acked by the sh_mobile maintainer Simon Horman" * 'i2c/for-4.2' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (48 commits) i2c: busses: i2c-bcm2835: limits cdiv to allowed values i2c: sh_mobile: use proper type for timeout i2c: sh_mobile: use adapter default for timeout i2c: rcar: use proper type for timeout i2c: rcar: use adapter default for timeout i2c: designware: Make sure the device is suspended before disabling runtime PM i2c: tegra: apply size limit quirk i2c: tegra: don't advertise SMBUS_QUICK i2c: octeon: remove unused signal handling i2c: davinci: Optimize SCL generation i2c: mux: pca954x: Use __i2c_transfer because of quirks i2c: mux: Use __i2c_transfer() instead of calling parent's master_xfer() i2c: use parent adapter quirks in mux i2c: bcm2835: clear reserved bits in S-Register ARM: shmobile: r8a7740: remove I2C errata handling i2c: sh_mobile: add errata workaround i2c: at91: fix code checker warnings i2c: busses: xgene-slimpro: fix incorrect __init declation for probe i2c: davinci: Avoid sending to own address i2c: davinci: Refactor i2c_davinci_wait_bus_not_busy() ...
| * i2c: slave: docs: be more precise about the prerequsitesWolfram Sang2015-06-011-10/+15
| | | | | | | | | | | | | | | | | | | | There was some confusion what was needed to utilize the slave support, so let's be more precise about this. Add an introductory paragraph to the development section while we are here. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* | i2c: slave: fix the example how to instantiate from userspaceWolfram Sang2015-06-171-3/+3
|/ | | | | | | | | | | I copied the wrong shell code into the documentation. Sorry to all who tried to get sense out of this current example :/ Slight rewording while we are here. Reported-by: Tim Bakker <bakkert@mymail.vcu.edu> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Cc: stable@kernel.org
* i2c: slave: add documentation for i2c-slave-eepromWolfram Sang2015-03-271-0/+14
| | | | | | Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* Documentation: i2c: describe the new slave modeWolfram Sang2015-03-272-4/+179
| | | | | Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* i2c: fix reference to functionality constants definitionBaruch Siach2015-02-191-1/+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>
* Documentation: i2c: Use PM ops instead of legacy suspend/resumeLars-Peter Clausen2014-12-042-8/+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>
* i2c: i801: Add DeviceIDs for SunrisePoint LPDevin Ryles2014-11-121-0/+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>
* i2c: i801: Add Device IDs for Intel Sunrise Point PCHjames.d.ralston@intel.com2014-10-161-0/+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>
* Documentation: i2c: rename variable "register" to "reg"Jose Manuel Alarcon Roldan2014-09-081-5/+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>
* i2c: i801: Add device ID for Intel Wildcat Point PCHJean Delvare2014-07-171-0/+1
| | | | | Signed-off-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* i2c: stub: Add support for banked register rangesJean Delvare2014-07-171-4/+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>
* i2c: stub: Add support for SMBus block commandsGuenter Roeck2014-07-171-2/+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>
* Documentation: i2c: improve section about flags mangling the protocolWolfram Sang2014-04-061-15/+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>
* i2c: Spelling s/than/that/Geert Uytterhoeven2014-03-121-1/+1
| | | | | Signed-off-by: Geert Uytterhoeven <geert+renesas@linux-m68k.org> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* i2c: i801: enable Intel BayTrail SMBUSChew, Kean ho2014-03-091-0/+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>
* Documentation: i2c: mention ACPI method for instantiating devicesWolfram Sang2014-02-151-0/+7
| | | | | Signed-off-by: Wolfram Sang <wsa@the-dreams.de> Acked-by: Guenter Roeck <linux@roeck-us.net>
* Documentation: i2c: describe devicetree method for instantiating devicesWolfram Sang2014-02-151-2/+32
| | | | Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* Merge branch 'i2c/for-current' of ↵Linus Torvalds2014-01-301-1/+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
| * i2c: piix4: Add support for AMD ML and CZ SMBus changesShane Huang2014-01-241-1/+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
* | Merge branch 'hwmon-for-linus' of ↵Linus Torvalds2014-01-305-5/+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
| * Update Jean Delvare's e-mail addressJean Delvare2014-01-295-5/+5
| | | | | | | | Signed-off-by: Jean Delvare <khali@linux-fr.org>
* | Documentation: i2c: Remove obsolete exampleHelia Correia2014-01-091-3/+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>
* i2c: i801: Add Device IDs for Intel Wildcat Point-LP PCHJames Ralston2013-11-141-0/+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>
* Merge branch 'for-linus' of ↵Linus Torvalds2013-09-061-2/+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 ...
| * doc: Fix typo in doucmentationsMasanari Iida2013-07-251-2/+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>
* | Documentation: i2c: Fix example in instantiating-devicesSachin Kamat2013-08-191-1/+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>
* | i2c: piix4: Add support for secondary SMBus on AMD SB800 and AMD FCH chipsetsRudolf Marek2013-08-151-3/+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>
* Merge branch 'i2c/for-next' of ↵Linus Torvalds2013-07-041-0/+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 ...
| * i2c: i801: SMBus patch for Intel Coleto Creek DeviceIDsSeth Heasley2013-06-201-0/+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>
* | i2c-piix4: Add AMD CZ SMBus device IDShane Huang2013-06-031-1/+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
* i2c: Fix my e-mail address in drivers and documentationGuenter Roeck2013-03-221-1/+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>
* i2c: i801: Add Device IDs for Intel Wellsburg PCHJames Ralston2013-02-151-0/+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>
* i2c: sis630: Add SIS964 supportAmaury Decrême2013-02-111-0/+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>
* i2c: Adding support for Intel iSMT SMBus 2.0 host controllerNeil Horman2013-02-101-0/+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>
* i2c: i801: SMBus patch for Intel Avoton DeviceIDsSeth Heasley2013-02-081-0/+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>
* i2c: core: Remove definition of i2c_smbus_process_callTushar Behera2013-01-282-4/+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>
* Documentation: remove __dev* attributes.Greg Kroah-Hartman2013-01-041-1/+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>
* i2c: Mention functionality flags in SMBus protocol documentationJean Delvare2012-12-161-9/+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>
* i2c-mux-gpio: Update documentationJean Delvare2012-10-051-0/+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>
* i2c-viapro: Add VIA VX900 device IDJean Delvare2012-10-051-1/+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>
* i2c-i801: Add Device IDs for Intel Lynx Point-LP PCHJames Ralston2012-09-101-0/+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>
* i2c-i801: Enable IRQ for SMBus transactionsDaniel Kurtz2012-07-241-3/+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>
* i2c/writing-clients: Mention module_i2c_driver()Jean Delvare2012-07-241-8/+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>
* i2c-piix4: Support AMD auxiliary SMBus controllerAndrew Armenia2012-07-241-0/+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>
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