u-boot.git/drivers/i2c/muxes/Kconfig, branch master

dm: core: Default to using DEVRES outside of xPL

2026-01-09T15:08:14Z

The devm alloc functions that we have may follow the Linux kernel model where allocations are (almost always) automatically free()'d. However, quite often we don't enable, in full U-Boot, the tracking and free()'ing functionality. This in turn leads to memory leaks because the driver author expects that since the functions have the same name as in the Linux Kernel they have the same behavior. In turn we then get functionally correct commits such as commit 00e1fed93c8c ("firmware: ti_sci: Fix memory leaks in devm_ti_sci_get_of_resource") that manually add these calls. Rather than manually tracking allocations and implementing free()s, rework things so that we follow expectations by enabling the DEVRES functionality (outside of xPL phases). This turns DEVRES from a prompted symbol to a symbol that must be select'd, and we now remove our non-managed alloc/free functions from outside of xPL builds. Reviewed-by: Michael Trimarchi Signed-off-by: Tom Rini

i2c: muxes: Add PCA9541 i2c arbitrator driver

2025-07-12T05:36:51Z

Add a driver for the PCA9541 i2c bus arbitrator based on the Linux driver for the same device. Co-developed-by: Jonathan Stroud Signed-off-by: Jonathan Stroud Signed-off-by: Padmarao Begari

i2c: muxes: pca954x: Add MAX735x/MAX736x support

2024-10-21T04:32:28Z

Add support for the following Maxim chips using the existing PCA954x driver: - MAX7356 - MAX7357 - MAX7358 - MAX7367 - MAX7368 - MAX7369 All added Maxim chips behave like the PCA954x, where a single SMBUS byte write selects up to 8 channels to be bridged to the primary bus. Tested using the MAX7358. Signed-off-by: Maksim Kiselev Reviewed-by: Heiko Schocher

spl: Ensure all SPL symbols in Kconfig have some SPL dependency

2022-07-07T13:29:08Z

Tighten up symbol dependencies in a number of places. Ensure that a SPL specific option has at least a direct dependency on SPL. In places where it's clear that we depend on something more specific, use that dependency instead. This means in a very small number of places we can drop redundant dependencies. Reported-by: Pali Rohár Signed-off-by: Tom Rini

i2c: muxes: pca954x: add PCA9546 variant

2020-04-20T04:47:35Z

This adds the PCA9546 4-channel i2c bus switch. Signed-off-by: Chris Packham Reviewed-by: Luca Ceresoli Reviewed-by: Heiko Schocher

i2c: muxes: pca954x: support PCA9543 I2C switch

2019-04-11T13:21:33Z

The PCA9543 is a 2-channel I2C switch. Signed-off-by: Luca Ceresoli Reviewed-by: Heiko Schocher Acked-by: Michal Simek Reviewed-by: Heiko Schocher

i2c: muxes: pca954x: update list of supported devices

2019-04-11T13:21:33Z

The Kconfig help has not been updated while adding PCA9547 and PCA9646. Signed-off-by: Luca Ceresoli Acked-by: Michal Simek Reviewed-by: Heiko Schocher

kconfig: fix typo 'parition'

2018-08-17T13:22:35Z

Replaced misspelled words "parition"/"paritioning" (missing 't') in two Kconfig files by correct words "partition"/"partitioning" Signed-off-by: Simon Goldschmidt Reviewed-by: Philipp Tomsich

i2c: muxes: add i2c gpio multiplexer driver

2017-08-23T05:04:56Z

Add an i2c mux driver providing access to i2c bus segments using a hardware MUX sitting on a master bus and controlled through gpio pins. E.G. something like: ---------- ---------- Bus segment 1 - - - - - | | SCL/SDA | |-------------- | | | |------------| | | | | | Bus segment 2 | | | Linux | GPIO 1..N | MUX |--------------- Devices | |------------| | | | | | | | Bus segment M | | | |---------------| | ---------- ---------- - - - - - SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M according to the settings of the GPIO pins 1..N. Note commit log from kernel commit 92ed1a76("i2c: Add generic I2C multiplexer using GPIO API") Signed-off-by: Peng Fan Tested-by: Peng Fan (i.MX6QP-Sabreauto) Cc: Heiko Schocher Cc: Stefano Babic Cc: Simon Glass

i2c: muxes: Add support for TI PCA954X mux

2016-05-17T06:28:50Z

Add support for common TI i2c mux which is available on ZynqMP zcu102 board. DM i2c mux core code is selecting/deselecting bus before/after every command is performed that's why only one channel is active at a time. That's also the reason why deselect is just disable all available channels. Signed-off-by: Michal Simek Reviewed-by: Heiko Schocher Reviewed-by: Simon Glass