Merge tag 'v5.10-rc1' into asoc-5.10

Linux 5.10-rc1

Merge branch 'i2c/for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:

- if a host can be a client, too, the I2C core can now use it to
emula

Merge branch 'i2c/for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:

- if a host can be a client, too, the I2C core can now use it to
emulate SMBus HostNotify support (STM32 and R-Car added this so far)

- also for client mode, a testunit has been added. It can create rare
situations on the bus, so host controllers can be tested

- a binding has been added to mark the bus as "single-master". This
allows for better timeout detections

- new driver for Mellanox Bluefield

- massive refactoring of the Tegra driver

- EEPROMs recognized by the at24 driver can now have custom names

- rest is driver updates

* 'i2c/for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (80 commits)
Documentation: i2c: add testunit docs to index
i2c: tegra: Improve driver module description
i2c: tegra: Clean up whitespaces, newlines and indentation
i2c: tegra: Clean up and improve comments
i2c: tegra: Clean up printk messages
i2c: tegra: Clean up variable names
i2c: tegra: Improve formatting of variables
i2c: tegra: Check errors for both positive and negative values
i2c: tegra: Factor out hardware initialization into separate function
i2c: tegra: Factor out register polling into separate function
i2c: tegra: Factor out packet header setup from tegra_i2c_xfer_msg()
i2c: tegra: Factor out error recovery from tegra_i2c_xfer_msg()
i2c: tegra: Rename wait/poll functions
i2c: tegra: Remove "dma" variable from tegra_i2c_xfer_msg()
i2c: tegra: Remove redundant check in tegra_i2c_issue_bus_clear()
i2c: tegra: Remove likely/unlikely from the code
i2c: tegra: Remove outdated barrier()
i2c: tegra: Clean up variable types
i2c: tegra: Reorder location of functions in the code
i2c: tegra: Clean up probe function
...

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i2c: testunit: improve documentation

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

i2c: testunit: improve documentation

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>

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i2c: add slave testunit driver

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. SMBu

i2c: add slave testunit driver

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>

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