linux-dev/drivers/i2c/busses/Makefile, branch master

i2c: microchip: pci1xxxx: Add driver for I2C host controller in multifunction endpoint of pci1xxxx switch

2022-09-28T20:02:17Z

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 Reviewed-by: Andy Shevchenko Signed-off-by: Wolfram Sang

i2c: Add Renesas RZ/V2M controller

2022-07-22T16:46:41Z

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 Reviewed-by: Biju Das Reviewed-by: Andy Shevchenko Reviewed-by: Philipp Zabel [wsa: removed superfluous class type and renamed a function] Signed-off-by: Wolfram Sang

i2c: add support for microchip fpga i2c controllers

2022-07-07T20:54:29Z

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 Signed-off-by: Daire McNamara Signed-off-by: Conor Dooley Signed-off-by: Wolfram Sang

i2c: npcm: Support NPCM845

2022-06-08T20:01:27Z

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 Acked-by: Tomer Maimon Reviewed-by: Andy Shevchenko Signed-off-by: Wolfram Sang

i2c: Introduce common module to instantiate CCGx UCSI

2022-02-15T09:04:53Z

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 Signed-off-by: Wolfram Sang

i2c: designware: Add AMD PSP I2C bus support

2022-02-11T14:38:23Z

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 Reviewed-by: Andy Shevchenko Acked-by: Jarkko Nikula Tested-by: Jarkko Nikula [wsa: removed unneeded blank line and curly braces] Signed-off-by: Wolfram Sang

i2c: Remove unused Netlogic/Sigma Designs XLR driver

2021-11-23T09:00:29Z

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 Signed-off-by: Wolfram Sang

i2c: pasemi: Add Apple platform driver

2021-10-11T09:45:48Z

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 Signed-off-by: Sven Peter Acked-by: Olof Johansson Tested-by: Christian Zigotzky Signed-off-by: Wolfram Sang

i2c: pasemi: Split pci driver to its own file

2021-10-11T09:45:16Z

Split off the PCI driver so that we can reuse common code for the platform driver. Reviewed-by: Arnd Bergmann Signed-off-by: Sven Peter Acked-by: Olof Johansson Tested-by: Christian Zigotzky Signed-off-by: Wolfram Sang

i2c: virtio: add a virtio i2c frontend driver

2021-08-19T19:21:19Z

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 Signed-off-by: Conghui Chen Signed-off-by: Jie Deng Reviewed-by: Viresh Kumar Tested-by: Viresh Kumar Acked-by: Michael S. Tsirkin Signed-off-by: Wolfram Sang