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2023-10-29Documentation: i2c: add fault code for not supporting 10 bit addressesWolfram Sang1-0/+4
Document the specific fault code when 10 bit addresses cannot be supported. It is used for years, only the documentation slipped through the cracks. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-10-10i2c: i801: Add support for Intel Birch Stream SoCJarkko Nikula1-0/+1
Add SMBus PCI ID on Intel Birch Stream SoC. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-09-01Merge tag 'media/v6.6-1' of ↵Linus Torvalds2-0/+97
git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media Pull media updates from Mauro Carvalho Chehab: - new i2c drivers: ds90ub913, ds90ub953, ds90ub960, dw9719, ds90ub913 - new Intel IVSC MEI drivers - some Mediatek platform drivers were moved to a common location - Intel atomisp2 driver is now working with the main ov2680 driver. Due to that, the atomisp2 ov2680 staging one was removed - the bttv driver was finally converted to videobuf2 framework. This was the last one upstream using videobuf version 1 core. We'll likely remove the old videobuf framework on 6.7 - lots of improvements at atomisp driver: it now works with normal I2C sensors. Several compile-mode dependecies to select between ISP2400 and ISP2401 are now solved in runtime - a new ipu-bridge logic was added to work with IVSC MEI drivers - venus driver gained better support for new VPU versions - the v4l core async framework has gained lots of improvements and cleanups - lots of other cleanups, improvements and driver fixes * tag 'media/v6.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (358 commits) media: ivsc: Add ACPI dependency media: bttv: convert to vb2 media: bttv: use audio defaults for winfast2000 media: bttv: refactor bttv_set_dma() media: bttv: move vbi_skip/vbi_count out of buffer media: bttv: remove crop info from bttv_buffer media: bttv: remove tvnorm field from bttv_buffer media: bttv: remove format field from bttv_buffer media: bttv: move do_crop flag out of bttv_fh media: bttv: copy vbi_fmt from bttv_fh media: bttv: copy vid fmt/width/height from fh media: bttv: radio use v4l2_fh instead of bttv_fh media: bttv: replace BUG with WARN_ON media: bttv: use video_drvdata to get bttv media: i2c: rdacm21: Fix uninitialized value media: coda: Remove duplicated include media: vivid: fix the racy dev->radio_tx_rds_owner media: i2c: ccs: Check rules is non-NULL media: i2c: ds90ub960: Fix PLL config for 1200 MHz CSI rate media: i2c: ds90ub953: Fix use of uninitialized variables ...
2023-08-14i2c: Update documentation to use .probe() againUwe Kleine-König1-1/+1
Since commit 03c835f498b5 ("i2c: Switch .probe() to not take an id parameter") .probe() is the recommended callback to implement (again). Reflect this in the documentation and don't mention .probe_new() any more. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Reviewed-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-07-14media: i2c: add I2C Address Translator (ATR) supportLuca Ceresoli2-0/+97
An ATR is a device that looks similar to an i2c-mux: it has an I2C slave "upstream" port and N master "downstream" ports, and forwards transactions from upstream to the appropriate downstream port. But it is different in that the forwarded transaction has a different slave address. The address used on the upstream bus is called the "alias" and is (potentially) different from the physical slave address of the downstream chip. Add a helper file (just like i2c-mux.c for a mux or switch) to allow implementing ATR features in a device driver. The helper takes care of adapter creation/destruction and translates addresses at each transaction. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
2023-06-05i2c: i801: Add support for Intel Meteor Lake PCH-SJarkko Nikula1-1/+1
Add SMBus PCI ID on Intel Meteor Lake PCH-S. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-02-15Documentation: i2c: correct spellingRandy Dunlap2-2/+2
Correct spelling problems for Documentation/i2c/ as reported by codespell. Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-09-28docs: i2c: slave-interface: return errno when handle I2C_SLAVE_WRITE_REQUESTEDQuan Nguyen1-3/+6
In case backend is not ready, ie: fail to wakeup or initialization, on the returning of the I2C_SLAVE_WRITE_REQUESTED event, bus driver should aware the backend status and might auto sending NACK on the next incoming bytes for I2C master to retry. Signed-off-by: Quan Nguyen <quan@os.amperecomputing.com> Links:https://lore.kernel.org/linux-arm-kernel/556fa9e1-c54b-8370-4de7-c2d3ec7d6906@os.amperecomputing.com/ [wsa: made some wording more precise] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-09-27Merge branch 'master' into i2c/for-mergewindowWolfram Sang3-6/+6
2022-09-16Documentation: i2c: fix references to other documentsWolfram Sang3-6/+6
Similar to commit fe99b819487d ("docs: i2c: i2c-sysfs: fix hyperlinks"), make other links in documentation consistent with the preferred way. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-09-16Merge tag 'v6.0-rc5' into i2c/for-mergewindowWolfram Sang2-107/+120
Linux 6.0-rc5
2022-08-29docs: i2c: piix4: Fix typos, add markup, drop linkBruce Duncan1-8/+5
[JD: Update the subject One more typo fixed Drop the link to lm-sensors' README, it's irrelevant] Signed-off-by: Bruce Duncan <bwduncan@gmail.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-29docs: i2c: i2c-topology: reorder sections more logicallyLuca Ceresoli1-97/+114
The sequence of sections is a bit confusing here: * we list the mux locking scheme for existing drivers before introducing what mux locking schemes are * we list the caveats for each locking scheme (which are tricky) before the example of the simple use case Restructure it entirely with the following logic: * Intro ("I2C muxes and complex topologies") * Locking - mux-locked - example - caveats - parent-locked - example - caveats * Complex examples * Mux type of existing device drivers While there, also apply some other improvements: * convert the caveat list from a table (with only one column carrying content) to a bullet list. * add a small introductory text to bridge the gap from listing the use cases to telling about the hardware components to handle them and then the device drivers that implement those. * make empty lines usage more uniform Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-29docs: i2c: i2c-topology: fix incorrect headingLuca Ceresoli1-3/+2
"Etc" here was never meant to be a heading, it became one while converting to ReST. It would be easy to just convert it to plain text, but rather remove it and add an introductory text before the list that conveys the same meaning but with a better reading flow. Fixes: ccf988b66d69 ("docs: i2c: convert to ReST and add to driver-api bookset") Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-29docs: i2c: i2c-topology: fix typoLuca Ceresoli1-1/+1
"intension" should have probably been "intention", however "intent" seems even better. Reported-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-16i2c: Make remove callback return voidUwe Kleine-König1-1/+1
The value returned by an i2c driver's remove function is mostly ignored. (Only an error message is printed if the value is non-zero that the error is ignored.) So change the prototype of the remove function to return no value. This way driver authors are not tempted to assume that passing an error to the upper layer is a good idea. All drivers are adapted accordingly. There is no intended change of behaviour, all callbacks were prepared to return 0 before. Reviewed-by: Peter Senna Tschudin <peter.senna@gmail.com> Reviewed-by: Jeremy Kerr <jk@codeconstruct.com.au> Reviewed-by: Benjamin Mugnier <benjamin.mugnier@foss.st.com> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Crt Mori <cmo@melexis.com> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Acked-by: Marek Behún <kabel@kernel.org> # for leds-turris-omnia Acked-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Petr Machata <petrm@nvidia.com> # for mlxsw Reviewed-by: Maximilian Luz <luzmaximilian@gmail.com> # for surface3_power Acked-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> # for bmc150-accel-i2c + kxcjk-1013 Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> # for media/* + staging/media/* Acked-by: Miguel Ojeda <ojeda@kernel.org> # for auxdisplay/ht16k33 + auxdisplay/lcd2s Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # for versaclock5 Reviewed-by: Ajay Gupta <ajayg@nvidia.com> # for ucsi_ccg Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio Acked-by: Peter Rosin <peda@axentia.se> # for i2c-mux-*, max9860 Acked-by: Adrien Grassein <adrien.grassein@gmail.com> # for lontium-lt8912b Reviewed-by: Jean Delvare <jdelvare@suse.de> # for hwmon, i2c-core and i2c/muxes Acked-by: Corey Minyard <cminyard@mvista.com> # for IPMI Reviewed-by: Vladimir Oltean <olteanv@gmail.com> Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com> Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com> # for drivers/power Acked-by: Krzysztof Hałasa <khalasa@piap.pl> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: i2c-sysfs: fix hyperlinksLuca Ceresoli1-11/+4
dts files cannot be linked conveniently, thus replace them with literal formatting. The links to other rst pages are broken, fix them using the proper syntax. Fixes: 31df7195b100 ("Documentation: i2c: Add doc for I2C sysfs") Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: i2c-sysfs: improve wordingLuca Ceresoli1-5/+4
Improve wording in a couple sentences. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> [wsa: improved a little more] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: instantiating-devices: add syntax coloring to dts and C blocksLuca Ceresoli1-4/+12
These blocks can be nicely coloured via Sphinx. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: smbus-protocol: improve DataLow/DataHigh definitionLuca Ceresoli1-2/+2
Use a more professional wording. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Reviewed-by: Bagas Sanjaya <bagasdotme@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: i2c-protocol: remove unused legend itemsLuca Ceresoli1-5/+1
"Comm", "Count", "DataLow", "DataHigh" are not used in this section. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: i2c-protocol,smbus-protocol: remove nonsense wordsLuca Ceresoli2-2/+2
"as usual" does not mean much here, especially as these are introductory sections and 10-bit addressing hasn't been introduced yet. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-08-11docs: i2c: i2c-protocol: update introductory paragraphLuca Ceresoli1-1/+2
This sentence dates back to the pre-git era and it does not look very professional... As there is no clear definition of "finished", and given this page is already a pretty good overview, not to mention it is not the kernel responsibility to document the protocol in detail, let's update the text accordingly. Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-07-06i2c: i801: Add support for Intel Meteor Lake-PJarkko Nikula1-0/+1
Add SMBus PCI ID on Intel Meteor Lake-P. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-05-04docs: i2c: reference simple probesStephen Kitt1-5/+8
Instead of documenting old-style probes, reference "simple probes" and document the i2c_match_id function. This might help reduce the use of two-argument probes in new code. Signed-off-by: Stephen Kitt <steve@sk2.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-02-15i2c: i801: Add support for Intel Raptor Lake PCH-SJarkko Nikula1-0/+1
Add SMBus PCI ID on Intel Raptor Lake PCH-S. Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-12-31Docs: Fixes link to I2C specificationDeep Majumder1-3/+5
The link to the I2C specification is broken. Although "https://www.nxp.com" hosts Rev 7 (2021) of this specification, it is behind a login-wall. Thus, an additional link has been added (which doesn't require a login) and the NXP official docs link has been updated. Signed-off-by: Deep Majumder <deep@fastmail.in> [wsa: minor updates to text and commit message] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-11-23docs: i2c: smbus-protocol: mention the repeated start conditionMiquel Raynal1-6/+8
Sr is a repeated start, it is used in both I2C and SMBus protocols. Provide its description and replace start ("S") conditions with repeated start ("Sr") conditions when relevant. This allows the documentation to match the SMBus specification available at [1]. [1] http://www.smbus.org/specs/SMBus_3_1_20180319.pdf Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-08-10Documentation: i2c: add i2c-sysfs into indexHu Haowen1-0/+1
Append i2c-sysfs to toctree in order to get rid of building warnings. Fixes: 31df7195b100 ("Documentation: i2c: Add doc for I2C sysfs") Signed-off-by: Hu Haowen <src.res@email.cn> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-07-04Merge branch 'i2c/for-mergewindow' of ↵Linus Torvalds1-0/+395
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: - core supports now bus regulators controlling power for SCL/SDA - quite some DT binding conversions to YAML - added a seperate DT binding for the optional SMBus Alert feature - documentation with examples how to deal with I2C sysfs files - some bigger rework for the i801 driver - and a few usual driver updates * 'i2c/for-mergewindow' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (42 commits) i2c: ali1535: mention that the device should not be disabled i2c: mpc: Restore reread of I2C status register i2c: core-smbus: Expose PEC calculate function for generic use Documentation: i2c: Add doc for I2C sysfs i2c: core: Disable client irq on reboot/shutdown dt-bindings: i2c: update bindings for MT8195 SoC i2c: imx: Fix some checkpatch warnings i2c: davinci: Simplify with dev_err_probe() i2c: cadence: Simplify with dev_err_probe() i2c: xiic: Simplify with dev_err_probe() i2c: cadence: Clear HOLD bit before xfer_size register rolls over dt-bindings: i2c: ce4100: Replace "ti,pcf8575" by "nxp,pcf8575" i2c: i801: Improve i801_setup_hstcfg i2c: i801: Use driver name constant instead of function dev_driver_string i2c: i801: Simplify initialization of i2c_board_info in i801_probe_optional_slaves i2c: i801: Improve status polling i2c: cht-wc: Replace of_node by NULL i2c: riic: Add RZ/G2L support dt-bindings: i2c: renesas,riic: Document RZ/G2L I2C controller dt-bindings: i2c: renesas,iic: Convert to json-schema ...
2021-06-25Documentation: i2c: Add doc for I2C sysfsAlex Qiu1-0/+395
This doc helps Linux users navigate through I2C sysfs and learn the system I2C topology. Signed-off-by: Alex Qiu <xqiu@google.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-06-17docs: i2c: avoid using ReST :doc:`foo` markupMauro Carvalho Chehab3-4/+5
The :doc:`foo` tag is auto-generated via automarkup.py. So, use the filename at the sources, instead of :doc:`foo`. Acked-by: Wolfram Sang <wsa@kernel.org> Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Link: https://lore.kernel.org/r/569722e3f7d73d746c145ea78d2b4fbe5defee90.1623824363.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2021-02-12i2c: testunit: add support for block process callsWolfram Sang1-2/+21
Devices offering SMBus block process calls are rare, so add it to the testunit. This is also a good test case for testing proper I2C_M_RECV_LEN flag handling of I2C bus masters emulating SMBus. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05Documentation: i2c: add testunit docs to indexWolfram Sang1-0/+1
Fixes: a8335c64c5f0 ("i2c: add slave testunit driver") Reported-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-10-05i2c: testunit: improve documentationWolfram Sang1-5/+8
Mention that new CMDs will be NACKed while the old one is still on-going, that the I2C address parameter of READ_BYTES is 7 bit only, and reword one paragraph to be more precise. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-09-29i2c: i801: Add support for Intel Alder Lake PCH-SJarkko Nikula1-0/+1
Add PCI ID of SMBus controller on Intel Alder Lake PCH-S Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-09-21i2c: add slave testunit driverWolfram Sang1-0/+66
Here is an I2C slave backend driver which allows to test some uncommon functionalities of the I2C and SMBus world. Usually, you need specific devices to test e.g. SMBus Host Notify and such. With this driver you just need the slave interface of another I2C controller. This initial version has testcases for multi-master and SMBus Host Notify. Already planned but not yet implemented are SMBus Alert and messages with I2C_M_RECV_LEN. Please read the documentation for further details. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-08-13Merge branch 'i2c/for-5.9' of ↵Linus Torvalds2-0/+3
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: - bus recovery can now be given a pinctrl handle and the I2C core will do all the steps to switch to/from GPIO which can save quite some boilerplate code from drivers - "fallthrough" conversion - driver updates, mostly ID additions * 'i2c/for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (32 commits) i2c: iproc: fix race between client unreg and isr i2c: eg20t: use generic power management i2c: eg20t: Drop PCI wakeup calls from .suspend/.resume i2c: mediatek: Fix i2c_spec_values description i2c: mediatek: Add i2c compatible for MediaTek MT8192 dt-bindings: i2c: update bindings for MT8192 SoC i2c: mediatek: Add access to more than 8GB dram in i2c driver i2c: mediatek: Add apdma sync in i2c driver i2c: i801: Add support for Intel Tiger Lake PCH-H i2c: i801: Add support for Intel Emmitsburg PCH i2c: bcm2835: Replace HTTP links with HTTPS ones Documentation: i2c: dev: 'block process call' is supported i2c: at91: Move to generic GPIO bus recovery i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs i2c: core: add generic I2C GPIO recovery dt-bindings: i2c: add generic properties for GPIO bus recovery i2c: rcar: avoid race when unregistering slave i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c i2c: tegra: Fix runtime resume to re-init VI I2C i2c: tegra: Fix the error path in tegra_i2c_runtime_resume ...
2020-08-13Merge tag 'docs-5.9-2' of git://git.lwn.net/linuxLinus Torvalds2-286/+0
Pull documentation fixes from Jonathan Corbet: "A handful of obvious fixes that wandered in during the merge window" * tag 'docs-5.9-2' of git://git.lwn.net/linux: Documentation/locking/locktypes: fix the typo doc/zh_CN: resolve undefined label warning in admin-guide index doc/zh_CN: fix title heading markup in admin-guide cpu-load docs: remove the 2.6 "Upgrading I2C Drivers" guide docs: Correct the release date of 5.2 stable mailmap: Update comments for with format and more detalis docs: cdrom: Fix a typo and rst markup Doc: admin-guide: use correct legends in kernel-parameters.txt Documentation/features: refresh RISC-V arch support files documentation: coccinelle: Improve command example for make C={1,2} Core-api: Documentation: Replace deprecated :c:func: Usage Dev-tools: Documentation: Replace deprecated :c:func: Usage Filesystems: Documentation: Replace deprecated :c:func: Usage docs: trace: fix a typo
2020-08-11docs: remove the 2.6 "Upgrading I2C Drivers" guideStephen Kitt2-286/+0
All the drivers have long since been upgraded, and all the important information here is also included in the "Implementing I2C device drivers" guide. Signed-off-by: Stephen Kitt <steve@sk2.org> Reviewed-by: Wolfram Sang <wsa@kernel.org> Link: https://lore.kernel.org/r/20200806161456.8680-1-steve@sk2.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-08-05i2c: i801: Add support for Intel Emmitsburg PCHMika Westerberg1-0/+1
Add support for SMBus controller on Intel Emmitsburg PCH. This is the same IP as used in Cannon Lake and derivatives. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-08-05Documentation: i2c: dev: 'block process call' is supportedWolfram Sang1-0/+2
And it has been for a while (since 2012 at least), only it was not documented. Add it. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-08-04Merge tag 'docs-5.9' of git://git.lwn.net/linuxLinus Torvalds1-1/+1
Pull documentation updates from Jonathan Corbet: "It's been a busy cycle for documentation - hopefully the busiest for a while to come. Changes include: - Some new Chinese translations - Progress on the battle against double words words and non-HTTPS URLs - Some block-mq documentation - More RST conversions from Mauro. At this point, that task is essentially complete, so we shouldn't see this kind of churn again for a while. Unless we decide to switch to asciidoc or something...:) - Lots of typo fixes, warning fixes, and more" * tag 'docs-5.9' of git://git.lwn.net/linux: (195 commits) scripts/kernel-doc: optionally treat warnings as errors docs: ia64: correct typo mailmap: add entry for <alobakin@marvell.com> doc/zh_CN: add cpu-load Chinese version Documentation/admin-guide: tainted-kernels: fix spelling mistake MAINTAINERS: adjust kprobes.rst entry to new location devices.txt: document rfkill allocation PCI: correct flag name docs: filesystems: vfs: correct flag name docs: filesystems: vfs: correct sync_mode flag names docs: path-lookup: markup fixes for emphasis docs: path-lookup: more markup fixes docs: path-lookup: fix HTML entity mojibake CREDITS: Replace HTTP links with HTTPS ones docs: process: Add an example for creating a fixes tag doc/zh_CN: add Chinese translation prefer section doc/zh_CN: add clearing-warn-once Chinese version doc/zh_CN: add admin-guide index doc:it_IT: process: coding-style.rst: Correct __maybe_unused compiler label futex: MAINTAINERS: Re-add selftests directory ...
2020-07-13Documentation: i2c: eliminate duplicated wordRandy Dunlap1-1/+1
Drop doubled word "new". Signed-off-by: Randy Dunlap <rdunlap@infradead.org> Cc: Jonathan Corbet <corbet@lwn.net> Cc: linux-doc@vger.kernel.org Cc: Wolfram Sang <wsa@kernel.org> Cc: linux-i2c@vger.kernel.org Link: https://lore.kernel.org/r/20200707180414.10467-10-rdunlap@infradead.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-07-04i2c: slave-eeprom: update documentationWolfram Sang1-5/+17
Add more details which have either been missing ever since or describe recent additions. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-06-19Documentation/i2c: SMBus start signal is S not ADaniel Schaefer1-1/+1
Just like all other I2C/SMBus commands, the start signal for the SMBus Quick Command is S, not A. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Daniel Schaefer <git@danielschaefer.me> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-04-20docs: i2c: rename i2c.svg to i2c_bus.svgMauro Carvalho Chehab2-2/+2
When generating the PDF output, the Documentation/i2c dir will generate an i2c.pdf. The same happens with i2c.svg: it will also produce a file with the same name, at the same dir. This causes errors when building the PDF output. So, rename the image to i2c_bus.svg. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Acked-by: Wolfram Sang <wsa@the-dreams.de> Link: https://lore.kernel.org/r/ecf3d51909ce46b3e84a1df4b36f07d76989e5da.1586881715.git.mchehab+huawei@kernel.org Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-03-10i2c: convert SMBus alert setup function to return an ERRPTRWolfram Sang1-1/+1
Only few drivers use this call, so drivers and I2C core are converted at once with this patch. By simply using i2c_new_client_device() instead of i2c_new_device(), we easily can return an ERRPTR for this function as well. To make out of tree users aware that something changed, the function is renamed to i2c_new_smbus_alert_device(). Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-29docs: i2c: writing-clients: properly name the stop conditionLuca Ceresoli1-3/+3
In I2C there is no such thing as a "stop bit". Use the proper naming: "stop condition". Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reported-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-29docs: i2c: i2c-protocol: use same wording as smbus-protocolLuca Ceresoli1-3/+3
In smbus-protocol.rst we use the text "Implemented by" for the same meaning as "This corresponds to". Change everything to "Implemented by" for coherency. Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net> Reported-by: Jean Delvare <jdelvare@suse.de> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
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