i2c: spacemit: add support for SpacemiT K1 SoC

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 B

i2c: spacemit: add support for SpacemiT K1 SoC

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 <[email protected]>
Reviewed-by: Alex Elder <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

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i2c: omap: Add support for setting mux

Some SoCs require muxes in the routing for SDA and SCL lines.
Therefore, add support for setting the mux by reading the mux-states
property from the dt-node.

i2c: omap: Add support for setting mux

Some SoCs require muxes in the routing for SDA and SCL lines.
Therefore, add support for setting the mux by reading the mux-states
property from the dt-node.

Signed-off-by: Jayesh Choudhary <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andi Shyti <[email protected]>

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i2c: imx-lpi2c: select CONFIG_I2C_SLAVE

The addition of target mode causes a build failure when CONFIG_I2C_SLAVE
is turned off:

drivers/i2c/busses/i2c-imx-lpi2c.c:1273:10: error: 'const struct i2c_

i2c: imx-lpi2c: select CONFIG_I2C_SLAVE

The addition of target mode causes a build failure when CONFIG_I2C_SLAVE
is turned off:

drivers/i2c/busses/i2c-imx-lpi2c.c:1273:10: error: 'const struct i2c_algorithm' has no member named 'reg_target'
1273 | .reg_target = lpi2c_imx_register_target,
| ^~~~~~~~~~
drivers/i2c/busses/i2c-imx-lpi2c.c:1274:10: error: 'const struct i2c_algorithm' has no member named 'unreg_target'
1274 | .unreg_target = lpi2c_imx_unregister_target,
| ^~~~~~~~~~~~

Select the Kconfig symbol like we do for other similar drivers.

Fixes: 1ee867e465c1 ("i2c: imx-lpi2c: add target mode support")
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Carlos Song <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>

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i2c: I2C_BRCMSTB should not default to y when compile-testing

Merely enabling compile-testing should not enable additional
functionality.

Signed-off-by: Geert Uytterhoeven <[email protected]>

i2c: I2C_BRCMSTB should not default to y when compile-testing

Merely enabling compile-testing should not enable additional
functionality.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Acked-by: Florian Fainelli <[email protected]>
Link: https://lore.kernel.org/r/36b2923241f285595f43bb9565da352fd366c63e.1733242595.git.geert+renesas@glider.be
Signed-off-by: Andi Shyti <[email protected]>

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i2c: nomadik: Enable compile testing for the Nomadik driver

The AMBA bus header files do not generate compilation errors even
when the AMBA bus is not enabled in Kconfig via ARM_AMBA.

This allows t

i2c: nomadik: Enable compile testing for the Nomadik driver

The AMBA bus header files do not generate compilation errors even
when the AMBA bus is not enabled in Kconfig via ARM_AMBA.

This allows the Nomadik driver to be compiled for testing
purposes with the COMPILE_TEST option enabled.

Cc: Linus Walleij <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Andi Shyti <[email protected]>

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i2c: Add driver for the RTL9300 I2C controller

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

i2c: Add driver for the RTL9300 I2C controller

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 <[email protected]>
Reviewed-by: Andi Shyti <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: busses: Use *-y instead of *-objs in Makefile

*-objs suffix is reserved rather for (user-space) host programs while
usually *-y suffix is used for kernel drivers (although *-objs works
for that

i2c: busses: Use *-y instead of *-objs in Makefile

*-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 <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: imx: add support for S32G2/S32G3 SoCs

Some S32G2/S32G3 SoC I2C particularities exist
such as different <clock divider, register value> pairs.
Those are addressed by adding specific S32G2 and S3

i2c: imx: add support for S32G2/S32G3 SoCs

Some S32G2/S32G3 SoC I2C particularities exist
such as different <clock divider, register value> pairs.
Those are addressed by adding specific S32G2 and S32G3
compatible strings.

Co-developed-by: Ionut Vicovan <[email protected]>
Signed-off-by: Ionut Vicovan <[email protected]>
Signed-off-by: Ciprian Marian Costea <[email protected]>
Reviewed-by: Frank Li <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: Drop legacy muxing pseudo-drivers

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-sp

i2c: Drop legacy muxing pseudo-drivers

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 <[email protected]>
Cc: Andi Shyti <[email protected]>
Cc: Nick Desaulniers <[email protected]>
Acked-by: Wolfram Sang <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: amd-asf: Add i2c_algorithm operations to support AMD ASF with SMBus

Implement the i2c_algorithm operations to enable support for AMD ASF
(Alert Standard Format) with SMBus. This enhancement inc

i2c: amd-asf: Add i2c_algorithm operations to support AMD ASF with SMBus

Implement the i2c_algorithm operations to enable support for AMD ASF
(Alert Standard Format) with SMBus. This enhancement includes:

- Adding functionality to identify and select the supported ASF functions.
- Implementing mechanisms for registering and deregistering I2C slave
devices.
- Providing support for data transfer operations over ASF.

Additionally, include a 'select' Kconfig entry as the current patch
utilizes .reg_slave() and .unreg_slave() callbacks, which are controlled
by CONFIG_I2C_SLAVE.

Reviewed-by: Andy Shevchenko <[email protected]>
Co-developed-by: Sanket Goswami <[email protected]>
Signed-off-by: Sanket Goswami <[email protected]>
Signed-off-by: Shyam Sundar S K <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: amd-asf: Add ACPI support for AMD ASF Controller

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
A

i2c: amd-asf: Add ACPI support for AMD ASF Controller

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 <[email protected]>
Co-developed-by: Sanket Goswami <[email protected]>
Signed-off-by: Sanket Goswami <[email protected]>
Signed-off-by: Shyam Sundar S K <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: i801: Add support for Intel Panther Lake

Add SMBus PCI IDs on Intel Panther Lake-P and -U.

Signed-off-by: Jarkko Nikula <[email protected]>
Signed-off-by: Andi Shyti <andi.shyti@ke

i2c: i801: Add support for Intel Panther Lake

Add SMBus PCI IDs on Intel Panther Lake-P and -U.

Signed-off-by: Jarkko Nikula <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: Congatec Board Controller i2c bus driver

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

i2c: Congatec Board Controller i2c bus driver

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 <[email protected]>
Signed-off-by: Thomas Richard <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Lee Jones <[email protected]>

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i2c: keba: I2C_KEBA should depend on KEBA_CP500

The KEBA I2C controller is only present on KEBA PLC devices. Hence add
a dependency on KEBA_CP500, to prevent asking the user about this driver
when

i2c: keba: I2C_KEBA should depend on KEBA_CP500

The KEBA I2C controller is only present on KEBA PLC devices. Hence add
a dependency on KEBA_CP500, to prevent asking the user about this driver
when configuring a kernel without KEBA CP500 system FPGA support.

Fixes: c7e08c816cd2fdf8 ("i2c: keba: Add KEBA I2C controller support")
Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Gerhard Engleder <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: keba: Add KEBA I2C controller support

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 I

i2c: keba: Add KEBA I2C controller support

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 <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: designware: Group all DesignWare drivers under a single option

There are quite a few drivers and options for the DesignWare
I2C adapter in the Kconfig. Grouping all of them under the
I2C_DESIGN

i2c: designware: Group all DesignWare drivers under a single option

There are quite a few drivers and options for the DesignWare
I2C adapter in the Kconfig. Grouping all of them under the
I2C_DESIGNWARE_CORE. That makes the menuconfig a bit more
easier to understand.

Signed-off-by: Heikki Krogerus <[email protected]>
Acked-by: Jarkko Nikula <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: piix4: Register SPDs

The piix4 I2C bus can carry SPDs, register them if present.
Only look on bus 0, as this is where the SPDs seem to be located.

Only the first 8 slots are supported. If the

i2c: piix4: Register SPDs

The piix4 I2C bus can carry SPDs, register them if present.
Only look on bus 0, as this is where the SPDs seem to be located.

Only the first 8 slots are supported. If the system has more,
then these will not be visible.

The AUX bus can not be probed as on some platforms it reports all
devices present and all reads return "0".
This would allow the ee1004 to be probed incorrectly.

Signed-off-by: Thomas Weißschuh <[email protected]>
Reviewed-by: Guenter Roeck <[email protected]>
Tested-by: Guenter Roeck <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: mt7621: Add Airoha EN7581 i2c support

Introduce i2c support to Airoha EN7581 SoC through the i2c-mt7621
driver.

Reviewed-by: AngeloGioacchino Del Regno <[email protected]

i2c: mt7621: Add Airoha EN7581 i2c support

Introduce i2c support to Airoha EN7581 SoC through the i2c-mt7621
driver.

Reviewed-by: AngeloGioacchino Del Regno <[email protected]>
Tested-by: Ray Liu <[email protected]>
Signed-off-by: Lorenzo Bianconi <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: i801: Add support for Intel Arrow Lake-H

Add SMBus PCI ID on Intel Arrow Lake-H.

Signed-off-by: Jarkko Nikula <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

i2c: add zhaoxin i2c controller driver

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

i2c: add zhaoxin i2c controller driver

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 <[email protected]>
Signed-off-by: Hans Hu <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: cadence: Add RISCV architecture support

Add RISCV support to Cadence I2C Kconfig which is used in platform
such as the StarFive JH8100.

Signed-off-by: Eng Lee Teh <[email protected]>

i2c: cadence: Add RISCV architecture support

Add RISCV support to Cadence I2C Kconfig which is used in platform
such as the StarFive JH8100.

Signed-off-by: Eng Lee Teh <[email protected]>
Signed-off-by: Ji Sheng Teoh <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: i801: Fix missing Kconfig dependency

The original change adds usage of i2c_root_adapter(), which is
implemented in i2c-mux.c. Therefore we can't use the multiplexing
if I2C_I801=y and I2C_MUX=m

i2c: i801: Fix missing Kconfig dependency

The original change adds usage of i2c_root_adapter(), which is
implemented in i2c-mux.c. Therefore we can't use the multiplexing
if I2C_I801=y and I2C_MUX=m.
Handling the dependencies in the code would become unnecessarily
complex, therefore create a new config symbol.

Fixes: 893fef0bc6aa ("i2c: i801: Call i2c_register_spd for muxed child segments")
Reported-by: kernel test robot <[email protected]>
Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/
Signed-off-by: Heiner Kallweit <[email protected]>
Reviewed-by: Wolfram Sang <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: ocores: convert to ioport_map() for IORESOURCE_IO

There is at least one machine that uses this driver but does not
have support for inb()/outb() instructions.

Convert this to using ioport_map(

i2c: ocores: convert to ioport_map() for IORESOURCE_IO

There is at least one machine that uses this driver but does not
have support for inb()/outb() instructions.

Convert this to using ioport_map() so it can build on architectures
that don't provide these but work correctly on machines that require
using port I/O.

Fixes: 47c21d2d52e0 ("i2c: add HAS_IOPORT dependencies")
Reported-by: Geert Uytterhoeven <[email protected]>
Link: https://lore.kernel.org/lkml/CAMuHMdVUQ2WgtpYPYfO2T=itMmZ7w=geREqDtsP8Q3ODh9rxdw@mail.gmail.com/
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Peter Korsgaard <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: add HAS_IOPORT dependencies

In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
compile time. We thus need to add HAS_IOPORT as dependency for those
drivers using them.

Co-

i2c: add HAS_IOPORT dependencies

In a future patch HAS_IOPORT=n will disable inb()/outb() and friends at
compile time. We thus need to add HAS_IOPORT as dependency for those
drivers using them.

Co-developed-by: Arnd Bergmann <[email protected]>
Signed-off-by: Arnd Bergmann <[email protected]>
Signed-off-by: Niklas Schnelle <[email protected]>
Reviewed-by: Wolfram Sang <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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i2c: rcar: Prepare for the advent of ARCH_RCAR_GEN4

Currently, all Kconfig symbols for R-Car Gen4 SoCs select
ARCH_RCAR_GEN3, which might confuse the casual reader. Prepare for the
advent of ARCH_R

i2c: rcar: Prepare for the advent of ARCH_RCAR_GEN4

Currently, all Kconfig symbols for R-Car Gen4 SoCs select
ARCH_RCAR_GEN3, which might confuse the casual reader. Prepare for the
advent of ARCH_RCAR_GEN4 by extending the dependency for auto-selecting
reset controller support.

Signed-off-by: Geert Uytterhoeven <[email protected]>
Reviewed-by: Wolfram Sang <[email protected]>
Signed-off-by: Andi Shyti <[email protected]>

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