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path: root/drivers/i2c/busses/Makefile
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2025-10-04Merge tag 'usb-6.18-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb Pull USB / Thunderbolt updates from Greg KH: "Here is the big set of USB and thunderbolt drivers for 6.18-rc1. It was another normal development cycle, with lots of the usual drivers getting updates: - Thunderbolt driver cleanups and additions - dwc3 driver updates - dwc2 driver updates - typec driver updates - xhci driver updates and additions - offload USB engine updates for better power management - unused tracepoint removals - usb gadget fixes and updates as more users start to rely on these drivers instead of the "old" function gadget drivers - new USB device ids - other minor driver USB driver updates - new USB I/O driver framework and driver additions" The last item, the usb i/o driver, has an i2c and gpio driver added through this tree. Those drivers were acked by the respective subsystem maintainers. All of these have been in linux-next for a while" * tag 'usb-6.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb: (132 commits) usb: vhci-hcd: Prevent suspending virtually attached devices USB: serial: option: add SIMCom 8230C compositions thunderbolt: Fix use-after-free in tb_dp_dprx_work usb: xhci: align PORTSC trace with one-based port numbering usb: xhci: correct indentation for PORTSC tracing function usb: xhci: improve TR Dequeue Pointer mask usb: xhci-pci: add support for hosts with zero USB3 ports usb: xhci: Update a comment about Stop Endpoint retries Revert "usb: xhci: Avoid Stop Endpoint retry loop if the endpoint seems Running" usb: gadget: f_rndis: Refactor bind path to use __free() usb: gadget: f_ecm: Refactor bind path to use __free() usb: gadget: f_acm: Refactor bind path to use __free() usb: gadget: f_ncm: Refactor bind path to use __free() usb: gadget: Introduce free_usb_request helper usb: gadget: Store endpoint pointer in usb_request usb: host: xhci-rcar: Add Renesas RZ/G3E USB3 Host driver support usb: host: xhci-plat: Add .post_resume_quirk for struct xhci_plat_priv usb: host: xhci-rcar: Move R-Car reg definitions dt-bindings: usb: Document Renesas RZ/G3E USB3HOST usb: gadget: f_fs: Fix epfile null pointer access after ep enable. ...
2025-09-16i2c: Add Nuvoton NCT6694 I2C supportMing Yu
This driver supports I2C adapter functionality for NCT6694 MFD device based on USB interface. Each I2C controller uses the default baudrate of 100kHz, which can be overridden via module parameters. Acked-by: Andi Shyti <andi.shyti@kernel.org> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Ming Yu <a0282524688@gmail.com> Link: https://lore.kernel.org/r/20250912091952.1169369-4-a0282524688@gmail.com Signed-off-by: Lee Jones <lee@kernel.org>
2025-09-12i2c: Add Intel USBIO I2C driverIsrael Cepeda
Add a a driver for the I2C auxbus child device of the Intel USBIO USB IO-expander used by the MIPI cameras on various new (Meteor Lake and later) Intel laptops. Co-developed-by: Hans de Goede <hansg@kernel.org> Signed-off-by: Hans de Goede <hansg@kernel.org> Signed-off-by: Israel Cepeda <israel.a.cepeda.lopez@intel.com> Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Link: https://lore.kernel.org/r/20250911181343.77398-4-hansg@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2025-05-19i2c: amd-isp: Add ISP i2c-designware driverPratap Nirujogi
The camera sensor is connected via ISP I2C bus in AMD SOC architectures. Add new I2C designware driver to support new camera sensors on AMD HW. Co-developed-by: Venkata Narendra Kumar Gutta <vengutta@amd.com> Signed-off-by: Venkata Narendra Kumar Gutta <vengutta@amd.com> Co-developed-by: Bin Du <bin.du@amd.com> Signed-off-by: Bin Du <bin.du@amd.com> Signed-off-by: Pratap Nirujogi <pratap.nirujogi@amd.com> Reviewed-by: Mario Limonciello <mario.limonciello@amd.com> Link: https://lore.kernel.org/r/20250424184952.1290019-1-pratap.nirujogi@amd.com Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2025-03-21i2c: spacemit: add support for SpacemiT K1 SoCTroy Mitchell
This patch introduces basic I2C support for the SpacemiT K1 SoC, utilizing interrupts for transfers. The driver has been tested using i2c-tools on a Bananapi-F3 board, and basic I2C read/write operations have been confirmed to work. Signed-off-by: Troy Mitchell <troymitchell988@gmail.com> Reviewed-by: Alex Elder <elder@riscstar.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org> Link: https://lore.kernel.org/r/20250319-k1-i2c-master-v8-2-013e2df2b78d@gmail.com
2024-11-21Merge tag 'i2c-for-6.13-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c updates from Wolfram Sang: "Core: - drivers can now use a GPIO as a side channel for SMBus Alerts using a generic binding - regular stuff like mem leak fix, Makefile maintenance... Host improvements and refactoring: - All controllers using the 'remove_new' callback have been reverted to use the 'remove' callback - Intel SCH controller underwent significant refactoring, this brings love and a modern look to the driver - PIIX4 driver refactored to enable usage by other drivers (e.g., AMD ASF) - iMX/MXC improved message handling to reduce protocol overhead: Refactored DMA/non-DMA read/write and bus polling mechanisms to achieve this. - ACPI documentation for PIIX4 New host features: - i2c-cadence support for atomic transfers - Qualcomm CII support for a 32MHz serial engine clock Deprecated features: - Dropped outdated support for AMD756 S4882 and NFORCE2 S4985. If somebody misses this, Jean will rewrite support using the proper i2c mux framework. New hardware IDs for existing drivers: - Intel Panther Lake - S32G2/S32G3 SoCs - HJMC01 DesignWare ACPI HID - PIC64GX to Microchip Core - Qualcomm SDM670 to Qualcomm CCI New drivers: - AMD ASF - Realtek RTL I2C Controller at24 updates: - add support for the lockable page on ST M24256E" * tag 'i2c-for-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (59 commits) docs: i2c: piix4: Add ACPI section i2c: Add driver for the RTL9300 I2C controller i2c: qcom-cci: Remove unused struct member cci_clk_rate dt-bindings: i2c: Add Realtek RTL I2C Controller i2c: busses: Use *-y instead of *-objs in Makefile i2c: imx: add support for S32G2/S32G3 SoCs dt-bindings: i2c: imx: add SoC specific compatible strings for S32G i2c: qcom-cci: Remove the unused variable cci_clk_rate i2c: Drop legacy muxing pseudo-drivers i2c: imx: prevent rescheduling in non dma mode i2c: imx: separate atomic, dma and non-dma use case i2c: imx: do not poll for bus busy in single master mode i2c: designware: Add a new ACPI HID for HJMC01 I2C controller i2c: qcom-geni: Keep comment why interrupts start disabled dt-bindings: i2c: microchip: corei2c: Add PIC64GX as compatible with driver i2c: designware: constify abort_sources i2c: Switch back to struct platform_driver::remove() i2c: qcom-geni: Support systems with 32MHz serial engine clock i2c: qcom-cci: Stop complaining about DT set clock rate dt-bindings: i2c: qcom-cci: Document SDM670 compatible ...
2024-11-17i2c: Add driver for the RTL9300 I2C controllerChris Packham
Add support for the I2C controller on the RTL9300 SoC. There are two I2C controllers in the RTL9300 that are part of the Ethernet switch register block. Each of these controllers owns a SCL pin (GPIO8 for the fiorst I2C controller, GPIO17 for the second). There are 8 possible SDA pins (GPIO9-16) that can be assigned to either I2C controller. This relationship is represented in the device tree with a child node for each SDA line in use. This is based on the openwrt implementation[1] but has been significantly modified [1] - https://git.openwrt.org/?p=openwrt/openwrt.git;a=blob;f=target/linux/realtek/files-5.15/drivers/i2c/busses/i2c-rtl9300.c Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz> Reviewed-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-11-17i2c: busses: Use *-y instead of *-objs in MakefileAndy Shevchenko
*-objs suffix is reserved rather for (user-space) host programs while usually *-y suffix is used for kernel drivers (although *-objs works for that purpose for now). Let's correct the old usages of *-objs in Makefiles. While at it, fix an obvious typo in help section of the Kconfig. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-11-17i2c: Drop legacy muxing pseudo-driversJean Delvare
The i2c-amd756-s4882 and i2c-nforce2-s4985 muxing pseudo-drivers were written at a time when the i2c core did not support muxing. They are essentially board-specific hacks. If we had to add support for these boards today, we would implement it in a completely different way. These Tyan server boards are 19 years old by now, so I very much doubt any of these is still running today. So let's just drop this clumsy code. If anyone really still needs this support and complains, I'll rewrite it in a proper way on top of i2c-mux. This also fixes the following warnings: drivers/i2c/busses/i2c-amd756.c:286:20: warning: symbol 'amd756_smbus' was not declared. Should it be static? drivers/i2c/busses/i2c-nforce2.c:123:20: warning: symbol 'nforce2_smbus' was not declared. Should it be static? Signed-off-by: Jean Delvare <jdelvare@suse.de> Cc: Andi Shyti <andi.shyti@kernel.org> Cc: Nick Desaulniers <ndesaulniers@google.com> Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-11-13i2c: amd-asf: Add ACPI support for AMD ASF ControllerShyam Sundar S K
The AMD ASF controller is presented to the operating system as an ACPI device. The AMD ASF driver can use ACPI to obtain information about the ASF controller's attributes, such as the ASF address space and interrupt number, and to handle ASF interrupts. Currently, the piix4 driver assumes that a specific port address is designated for AUX operations. However, with the introduction of ASF, the same port address may also be used by the ASF controller. Therefore, a check needs to be added to ensure that if ASF is advertised and enabled in ACPI, the AUX port should not be configured. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Co-developed-by: Sanket Goswami <Sanket.Goswami@amd.com> Signed-off-by: Sanket Goswami <Sanket.Goswami@amd.com> Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-10-09i2c: Congatec Board Controller i2c bus driverThomas Richard
Add i2c support for the Congatec Board Controller. The Board Controller has two i2c busses, a General Purpose bus and a Power Management bus. Acked-by: Andi Shyti <andi.shyti@kernel.org> Signed-off-by: Thomas Richard <thomas.richard@bootlin.com> Link: https://lore.kernel.org/r/20241001-congatec-board-controller-v3-3-39ceceed5c47@bootlin.com Signed-off-by: Lee Jones <lee@kernel.org>
2024-09-10i2c: keba: Add KEBA I2C controller supportGerhard Engleder
The KEBA I2C controller is found in the system FPGA of KEBA PLC devices. It is used to connect EEPROMs and hardware monitoring chips. The It is a simple I2C controller with a fixed bus speed of 100 kbit/s. The whole message transmission is executed by the driver. The driver triggers all steps over control, status and data register. There are no FIFOs or interrupts. Signed-off-by: Gerhard Engleder <eg@keba.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-06-26i2c: viai2c: turn common code into a proper moduleArnd Bergmann
The i2c-viai2c-common.c file is used by two drivers, but is not a proper abstraction and can get linked into both modules in the same configuration, which results in a warning: scripts/Makefile.build:236: drivers/i2c/busses/Makefile: i2c-viai2c-common.o is added to multiple modules: i2c-wmt i2c-zhaoxin The other problems with this include the incorrect use of a __weak function when both are built-in, and the fact that the "common" module is sprinked with 'if (i2c->plat == ...)' checks that have knowledge about the differences between the drivers using it. Avoid the link time warning by making the common driver a proper module with MODULE_LICENCE()/MODULE_AUTHOR() tags, and remove the __weak function by slightly rearranging the code. This adds a little more duplication between the two main drivers, but those versions get more readable in the process. Fixes: a06b80e83011 ("i2c: add zhaoxin i2c controller driver") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Hans Hu <HansHu-oc@zhaoxin.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-05-06i2c: add zhaoxin i2c controller driverHans Hu
Add Zhaoxin I2C controller driver. It provides the access to the i2c busses, which connects to the touchpad, eeprom, I2S, etc. Zhaoxin I2C controller has two separate busses, so may accommodate up to two I2C adapters. Those adapters are listed in the ACPI namespace with the IIC1D17 HID, and probed by a platform driver. The driver works with IRQ mode, and supports basic I2C features. Flags I2C_AQ_NO_ZERO_LEN and I2C_AQ_COMB_WRITE_THEN_READ are used to limit the unsupported access. Acked-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Hans Hu <hanshu-oc@zhaoxin.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-05-06i2c: wmt: split out common filesHans Hu
Since the I2C IP of both wmt and zhaoxin originates from VIA, it is better to separate the common code first. The common driver is named as i2c-viai2c-common.c. Old i2c-wmt.c renamed to i2c-viai2c-wmt.c. The MAINTAINERS file will be updated accordingly in upcoming commits. Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Signed-off-by: Hans Hu <hanshu-oc@zhaoxin.com> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2024-02-14i2c: pasemi: split driver into two separate modulesArnd Bergmann
On powerpc, it is possible to compile test both the new apple (arm) and old pasemi (powerpc) drivers for the i2c hardware at the same time, which leads to a warning about linking the same object file twice: scripts/Makefile.build:244: drivers/i2c/busses/Makefile: i2c-pasemi-core.o is added to multiple modules: i2c-apple i2c-pasemi Rework the driver to have an explicit helper module, letting Kbuild take care of whether this should be built-in or a loadable driver. Fixes: 9bc5f4f660ff ("i2c: pasemi: Split pci driver to its own file") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Sven Peter <sven@svenpeter.dev> Signed-off-by: Andi Shyti <andi.shyti@kernel.org>
2023-10-11i2c: Add support for Intel LJCA USB I2C driverWentong Wu
Implements the I2C function of Intel USB-I2C/GPIO/SPI adapter device named "La Jolla Cove Adapter" (LJCA). It communicate with LJCA I2C module with specific protocol through interfaces exported by LJCA USB driver. Signed-off-by: Wentong Wu <wentong.wu@intel.com> Reviewed-by: Sakari Ailus <sakari.ailus@linux.intel.com> Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com> Tested-by: Hans de Goede <hdegoede@redhat.com> Reviewed-by: Wolfram Sang <wsa@kernel.org> Link: https://lore.kernel.org/r/1696833205-16716-3-git-send-email-wentong.wu@intel.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2023-02-17i2c: Add GXP SoC I2C ControllerNick Hawkins
The GXP SoC supports 10 I2C engines. Each I2C engine is completely independent and can function both as an I2C master and I2C slave. The I2C master can operate in a multi master environment. The engines support a scalable speed from 8kHZ to 1.5 Mhz. Signed-off-by: Nick Hawkins <nick.hawkins@hpe.com> Reviewed-by: Joel Stanley <joel@jms.id.au> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2023-02-02i2c: ls2x: Add driver for Loongson-2K/LS7A I2C controllerBinbin Zhou
This I2C module is integrated into the Loongson-2K SoCs and Loongson LS7A bridge chip. Signed-off-by: Binbin Zhou <zhoubinbin@loongson.cn> Reviewed-by: Andy Shevchenko <andy@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-09-28i2c: microchip: pci1xxxx: Add driver for I2C host controller in ↵Tharun Kumar P
multifunction endpoint of pci1xxxx switch Microchip pci1xxxx is an unmanaged PCIe3.1a Switch for Consumer, Industrial and Automotive applications. This switch has multiple downstream ports. In one of the Switch's Downstream port, there is a multifunction endpoint for peripherals which includes an I2C host controller. The I2C function in the endpoint operates at 100KHz, 400KHz and 1 MHz and has buffer depth of 128 bytes. This patch provides the I2C controller driver for the I2C function of the switch. Signed-off-by: Tharun Kumar P <tharunkumar.pasumarthi@microchip.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-07-22i2c: Add Renesas RZ/V2M controllerPhil Edworthy
Yet another i2c controller from Renesas that is found on the RZ/V2M (r9a09g011) SoC. It can support only 100kHz and 400KHz operation. Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de> [wsa: removed superfluous class type and renamed a function] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-07-07i2c: add support for microchip fpga i2c controllersConor Dooley
Add Microchip CoreI2C i2c controller support. This driver supports the "hard" i2c controller on the Microchip PolarFire SoC & the basic feature set for "soft" i2c controller implemtations in the FPGA fabric. Co-developed-by: Daire McNamara <daire.mcnamara@microchip.com> Signed-off-by: Daire McNamara <daire.mcnamara@microchip.com> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-06-08i2c: npcm: Support NPCM845Tyrone Ting
Add NPCM8XX I2C support. The NPCM8XX uses a similar i2c module as NPCM7XX. The internal HW FIFO is larger in NPCM8XX. Signed-off-by: Tyrone Ting <kfting@nuvoton.com> Acked-by: Tomer Maimon <tmaimon77@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-02-15i2c: Introduce common module to instantiate CCGx UCSIAndy Shevchenko
Introduce a common module to provide an API to instantiate UCSI device for Cypress CCGx Type-C controller. Individual bus drivers need to select this one on demand. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2022-02-11i2c: designware: Add AMD PSP I2C bus supportJan Dabros
Implement an I2C controller sharing mechanism between the host (kernel) and PSP co-processor on some platforms equipped with AMD Cezanne SoC. On these platforms we need to implement "software" i2c arbitration. Default arbitration owner is PSP and kernel asks for acquire as well as inform about release of the i2c bus via mailbox mechanism. +---------+ <- ACQUIRE | | +---------| CPU |\ | | | \ +----------+ SDA | +---------+ \ | |------- MAILBOX +--> | I2C-DW | SCL | +---------+ | |------- | | | +----------+ +---------| PSP | <- ACK | | +---------+ +---------+ <- RELEASE | | +---------| CPU | | | | +----------+ SDA | +---------+ | |------- MAILBOX +--> | I2C-DW | SCL | +---------+ / | |------- | | | / +----------+ +---------| PSP |/ <- ACK | | +---------+ The solution is similar to i2c-designware-baytrail.c implementation, where we are using a generic i2c-designware-* driver with a small "wrapper". In contrary to baytrail semaphore implementation, beside internal acquire_lock() and release_lock() methods we are also applying quirks to lock_bus() and unlock_bus() global adapter methods. With this in place all i2c clients drivers may lock i2c bus for a desired number of i2c transactions (e.g. write-wait-read) without being aware of that such bus is shared with another entity. Modify i2c_dw_probe_lock_support() to select correct semaphore implementation at runtime, since now we have more than one available. Configure new matching ACPI ID "AMDI0019" and register ARBITRATION_SEMAPHORE flag in order to distinguish setup with PSP arbitration. Add myself as a reviewer for I2C DesignWare in order to help with reviewing and testing possible changes touching new i2c-designware-amdpsp.c module. Signed-off-by: Jan Dabros <jsd@semihalf.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Tested-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> [wsa: removed unneeded blank line and curly braces] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-11-23i2c: Remove unused Netlogic/Sigma Designs XLR driverRob Herring
Commits 95b8a5e0111a ("MIPS: Remove NETLOGIC support") and edd4488aea9c ("ARM: remove tango platform") removed Netlogic XLR and Sigma Designs Tango platforms which means there are no platforms using the XLR I2C driver and it can be removed. Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-10-11i2c: pasemi: Add Apple platform driverSven Peter
With all the previous preparations we can now finally add the platform driver to support the PASemi-based controllers in Apple SoCs. This does not work on the M1 yet but should work on the early iPhones already. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sven Peter <sven@svenpeter.dev> Acked-by: Olof Johansson <olof@lixom.net> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-10-11i2c: pasemi: Split pci driver to its own fileSven Peter
Split off the PCI driver so that we can reuse common code for the platform driver. Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Sven Peter <sven@svenpeter.dev> Acked-by: Olof Johansson <olof@lixom.net> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-08-19i2c: virtio: add a virtio i2c frontend driverJie Deng
Add an I2C bus driver for virtio para-virtualization. The controller can be emulated by the backend driver in any device model software by following the virtio protocol. The device specification can be found on https://lists.oasis-open.org/archives/virtio-comment/202101/msg00008.html. By following the specification, people may implement different backend drivers to emulate different controllers according to their needs. Co-developed-by: Conghui Chen <conghui.chen@intel.com> Signed-off-by: Conghui Chen <conghui.chen@intel.com> Signed-off-by: Jie Deng <jie.deng@intel.com> Reviewed-by: Viresh Kumar <viresh.kumar@linaro.org> Tested-by: Viresh Kumar <viresh.kumar@linaro.org> Acked-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-08-17i2c: remove dead PMC MSP TWI/SMBus/I2C driverLukas Bulwahn
Commit 1b00767fd8e1 ("MIPS: Remove PMC MSP71xx platform") removes the config PMC_MSP in ./arch/mips/Kconfig. Hence, since then, the corresponding PMC MSP TWI/SMBus/I2C driver is dead code. Remove this dead driver. Signed-off-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-04-10i2c: add support for HiSilicon I2C controllerYicong Yang
Add HiSilicon I2C controller driver for the Kunpeng SoC. It provides the access to the i2c busses, which connects to the eeprom, rtc, etc. The driver works with IRQ mode, and supports basic I2C features and 10bit address. The DMA is not supported. Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Reviewed-by: Dmitry Osipenko <digetx@gmail.com> Signed-off-by: Yicong Yang <yangyicong@hisilicon.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-04-05i2c: cp2615: add i2c driver for Silicon Labs' CP2615 Digital Audio BridgeBence Csókás
Create an i2c_adapter for CP2615's I2C master interface Signed-off-by: Bence Csókás <bence98@sch.bme.hu> [wsa: switched to '__packed', added some 'static' and an include] Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-01-28i2c: remove zte zx bus driverArnd Bergmann
The zte zx platform is getting removed, so this driver is no longer needed. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-01-22i2c: remove u300 bus driverArnd Bergmann
The ST-Ericsson U300 platform is getting removed, so this driver is no longer needed. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-01-22i2c: remove sirf bus driverArnd Bergmann
The CSR SiRF prima2/atlas platforms are getting removed, so this driver is no longer needed. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Barry Song <baohua@kernel.org> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2021-01-17i2c: Drop unused efm32 bus driverUwe Kleine-König
Support for this machine was just removed, so drop the now unused i2c bus driver, too. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-09-27i2c: mlxbf: I2C SMBus driver for Mellanox BlueField SoCKhalil Blaiech
Add BlueField I2C driver to offer master and slave support for Mellanox BlueField SoCs. The driver implements an SMBus adapter and interfaces to multiple busses that can be probed using both ACPI and Device Tree infrastructures. The driver supports several SMBus operations to transfer data back and forth from/to various I2C devices. It is mainly intended to be consumed by userspace tools and utilities, such as i2c-tools and decode-dimms to collect memory module information. On the other hand, the driver has a slave function to support, among others, an IPMB interface that requires both master and slave functions to handle transfers between the BlueField SoC and a board management controllers (e.g., BMC). Signed-off-by: Khalil Blaiech <kblaiech@mellanox.com> Reviewed-by: Vadim Pasternak <vadimp@mellanox.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-07-01i2c/buses: remove i2c-puv3 driverMike Rapoport
The unicore32 port is removed from the kernel. There is no point to keep stale i2c bus driver for this architecture. Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Guenter Roeck <linux@roeck-us.net>
2020-06-03i2c: npcm7xx: Add Nuvoton NPCM I2C controller driverTali Perry
Add Nuvoton NPCM BMC I2C controller driver. Signed-off-by: Tali Perry <tali.perry1@gmail.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-05-30i2c: designware: Use `-y` to build multi-object modulesSerge Semin
Since commit 4f8272802739 ("Documentation: update kbuild loadable modules goals & examples") `-objs` is fitted for building host programs, lets change DW I2C core, platform and PCI driver kbuild directives to using `-y`, which more straightforward for device drivers. By doing so we can discard the ifeq construction in favor to the more natural and less bulky `<module>-$(CONFIG_X) += x.o` Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru> Acked-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-05-13i2c: designware: Rename i2c_dw_probe() to i2c_dw_probe_master()Andy Shevchenko
As a preparatory patch to support slave mode for PCI enumerated devices rename i2c_dw_probe() to i2c_dw_probe_master() and split common i2c_dw_probe() as inline helper. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Wolfram Sang <wsa@kernel.org>
2020-04-18i2c: Add Qualcomm CCI I2C driverLoic Poulain
This commit adds I2C bus support for the Camera Control Interface (CCI) I2C controller found on the Qualcomm SoC processors. This I2C controller supports two masters and they are registered to the core. CCI versions supported in the driver are msm8916, msm8996 and sdm845. This is a rework of the patch posted by Vinod: https://patchwork.kernel.org/patch/10569961/ With additional fixes + most of the comments addressed. Signed-off-by: Todor Tomov <todor.tomov@linaro.org> Signed-off-by: Vinod Koul <vkoul@kernel.org> Signed-off-by: Loic Poulain <loic.poulain@linaro.org> Tested-by: Robert Foss <robert.foss@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> [wsa: removed err msg after platform_get_irq] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2020-01-15i2c: parport-light: remove driverWolfram Sang
The justification of a light version of the parport driver was less overhead for embedded systems. Well, today, even if an embedded system still has a parport, it surely can handle the fully-fledged parport driver. Remove it to reduce the maintenance burden. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Reviewed-by: Jean Delvare <jdelvare@suse.de> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-08-29i2c: Add i2c-icy for I2C on m68k/AmigaMax Staudt
This is the i2c-icy driver for the ICY board for Amiga computers. It connects a PCF8584 I2C controller to the Zorro bus, providing I2C connectivity. The original documentation can be found on Aminet: https://aminet.net/package/docs/hard/icy IRQ support is currently not implemented, as i2c-algo-pcf is built for the ISA bus and a straight implementation of the same stack locks up a Zorro machine. Signed-off-by: Max Staudt <max@enpas.org> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> [wsa: added a missing newline reported by checkpatch] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-06-26i2c: mt7621: Add MediaTek MT7621/7628/7688 I2C driverStefan Roese
This patch adds a driver for the I2C controller found on the MediaTek MT7621/7628/7688 SoC's. The base version of this driver was done by Steven Liu (according to the copyright and MODULE_AUTHOR lines). It can be found in the OpenWRT repositories (v4.14 at the time I looked). The base driver had many issues, which are disccussed here: https://en.forum.labs.mediatek.com/t/openwrt-15-05-loads-non-working-i2c-kernel-module-for-mt7688/1286/3 >From this link an enhanced driver version (complete rewrite, mayor changes: support clock stretching, repeated start, ACK handling and unlimited message length) from Jan Breuer can be found here: https://gist.github.com/j123b567/9b555b635c2b4069d716b24198546954 This patch now adds this enhanced I2C driver to mainline. Changes by Stefan Roese for upstreaming: - Add devicetree bindings - checkpatch clean - Use module_platform_driver() - Minor cosmetic enhancements - Removed IO warpped functions - Use readl_relaxed_poll_timeout() and drop poll_down_timeout() - Removed superfluous barrier() in mtk_i2c_reset() - Use i2c_8bit_addr_from_msg() - Added I2C_FUNC_PROTOCOL_MANGLING - Removed adap->class = I2C_CLASS_HWMON | I2C_CLASS_SPD; Signed-off-by: Stefan Roese <sr@denx.de> Tested-by: René van Dorst <opensource@vdorst.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-03-25i2c: Add drivers for the AMD PCIe MP2 I2C controllerElie Morisse
MP2 controllers have two separate busses, so may accommodate up to two I2C adapters. Those adapters are listed in the ACPI namespace with the "AMDI0011" HID, and probed by a platform driver. Communication with the MP2 takes place through MMIO registers, or through DMA for more than 32 bytes transfers. This is major rework of the patch submitted by Nehal-bakulchandra Shah from AMD (https://patchwork.kernel.org/patch/10597369/). Most of the event handling of v3 was rewritten to make it work with more than one bus (e.g on Ryzen-based Lenovo Yoga 530), and this version contains many other improvements. Signed-off-by: Elie Morisse <syniurge@gmail.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-03-24i2c: at91: added slave mode supportJuergen Fitschen
Slave mode driver is based on the concept of i2c-designware driver. Signed-off-by: Juergen Fitschen <me@jue.yt> [ludovic.desroches@microchip.com: rework Kconfig and replace IS_ENABLED by defined] Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2019-03-24i2c: at91: split driver into core and master fileJuergen Fitschen
The single file i2c-at91.c has been split into core code (i2c-at91-core.c) and master mode specific code (i2c-at91-master.c). This should enhance maintainability and reduce ifdeffery for slave mode related code. The code itself hasn't been touched. Shared functions only had to be made non-static. Furthermore, includes have been cleaned up. Signed-off-by: Juergen Fitschen <me@jue.yt> [ludovic.desroches@microchip.com: fix checkpatch errors and use SPDX] Signed-off-by: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-11-09i2c: add i2c bus driver for NVIDIA GPUAjay Gupta
Latest NVIDIA GPU card has USB Type-C interface. There is a Type-C controller which can be accessed over I2C. This driver adds I2C bus driver to communicate with Type-C controller. I2C client driver will be part of USB Type-C UCSI driver. Signed-off-by: Ajay Gupta <ajayg@nvidia.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> [wsa: kept Makefile sorting] Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
2018-08-04i2c: Add Actions Semiconductor Owl family S900 I2C driverManivannan Sadhasivam
Add Actions Semiconductor Owl family S900 I2C driver. Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Acked-by: Peter Rosin <peda@axentia.se> Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
generated by cgit v1.2.3 (git 2.0.4) at 2026-01-31 13:03:26 +0000