kernel/linux.git/drivers/i2c/muxes, branch v7.0.10

i2c: muxes: pca954x: Fix broken reset-gpio usage

2025-11-03T17:04:15+00:00

Revert commit 690de2902dca ("i2c: muxes: pca954x: Use reset controller only") and its dependent commit 94c296776403 ("i2c: muxes: pca954x: Reset if (de)select fails") because the first breaks all users of the driver, by requiring a completely optional reset-gpio driver. These commits cause that mux driver simply stops working when optional reset-gpio is not included, but that reset-gpio is not pulled anyhow. Driver cannot remove legacy reset-gpios handling. Fixes: 690de2902dca ("i2c: muxes: pca954x: Use reset controller only") Signed-off-by: Krzysztof Kozlowski Signed-off-by: Wolfram Sang

i2c: mux: pca9541: Use I2C adapter timeout value for arbitration timeout

2025-09-12T22:19:18+00:00

Remove existing arbitration timeout macros and use I2C adapter timeout value for arbitration timeout and forceful bus ownership. I2C adapter timeout can be configurable from user space, so using it for arbitration timeout helps in configuring the arbitration timeout from user space depending on the use case. Signed-off-by: Manikanta Guntupalli Signed-off-by: Wolfram Sang

i2c: muxes: pca954x: Reset if (de)select fails

2025-08-11T18:10:09+00:00

If the channel selection or deselection times out, it indicates a failure in the mux's I2C subsystem. Without sending a reset pulse, a power-on-reset of the entire device would be required to restore communication. The datasheet specifies a minimum hold time of 4 ns for the reset pulse, but due to the path's capacitance and themux having its own clock, it is recommended to extend this to approximately 1 us. Since reset controller is used, there is no need to take care of other devices sharing the same reset line. Signed-off-by: Wojciech Siudy [wsa: removed superfluous prinout, unneeded braces and fixed indent] Signed-off-by: Wolfram Sang

i2c: muxes: pca954x: Use reset controller only

2025-08-11T18:09:54+00:00

Fallback to legacy reset-gpios is no more needed, because the framework can use reset-gpios properity now as well. Signed-off-by: Wojciech Siudy [wsa: fixed whitespace issue] Signed-off-by: Wolfram Sang

treewide: rename GPIO set callbacks back to their original names

2025-08-07T08:07:06+00:00

The conversion of all GPIO drivers to using the .set_rv() and .set_multiple_rv() callbacks from struct gpio_chip (which - unlike their predecessors - return an integer and allow the controller drivers to indicate failures to users) is now complete and the legacy ones have been removed. Rename the new callbacks back to their original names in one sweeping change. Signed-off-by: Bartosz Golaszewski

i2c: muxes: mule: Fix an error handling path in mule_i2c_mux_probe()

2025-08-03T20:47:57+00:00

If an error occurs in the loop that creates the device adapters, then a reference to 'dev' still needs to be released. Use for_each_child_of_node_scoped() to both fix the issue and save one line of code. Fixes: d0f8e97866bf ("i2c: muxes: add support for tsd,mule-i2c multiplexer") Signed-off-by: Christophe JAILLET Signed-off-by: Wolfram Sang

i2c: mux: pca954x: Use dev_fwnode()

2025-06-27T10:51:07+00:00

irq_domain_create_simple() takes fwnode as the first argument. It can be extracted from the struct device using dev_fwnode() helper instead of using of_node with of_fwnode_handle(). So use the dev_fwnode() helper. Signed-off-by: Jiri Slaby (SUSE) [wsa: proper commit header] Signed-off-by: Wolfram Sang

i2c: use inclusive callbacks in struct i2c_algorithm

2025-06-12T08:05:31+00:00

Convert the I2C subsystem to drop using the 'master_'-prefixed callbacks in favor of the simplified ones. Fix alignment of '=' while here. Signed-off-by: Wolfram Sang

Merge tag 'i2c-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux

2025-05-30T17:07:53+00:00

Pull i2c updates from Wolfram Sang: "Core updates: - move towards using the 'fwnode' handle instead of 'of_node' (meaning 'of_node' even gets removed from i2c_board_info) - add support for Write Disable-aware SPD eeproms - minor stuff (use new helpers, typo fixes) i2c-atr (address translator) updates: - support per-channel alias pools - added support for dynamic address translation (also adds FPC202 driver as its user) - add 'static' and 'passthrough' flags Cleanups and refactorings - Many drivers switched to dev_err_probe() - Generic cleanups applied to designware, iproc, ismt, mlxbf, npcm7xx, qcom-geni, pasemi, and thunderx - davinci: declare I2C mangling support among I2C features - designware: clean up DTS handling - designware: fix PM runtime on driver unregister - imx: improve error logging during probe - lpc2k: improve checks in probe error path - xgene-slimpro: improve PCC shared memory handling - pasemi: improve error handling in reset, smbus clear, timeouts - tegra: validate buffer length during transfers - wmt: convert binding to YAML format Improvements and extended support: - microchip-core: add SMBus support - mlxbf: add support for repeated start in block transfers - mlxbf: improve timer configuration - npcm: attempt clock toggle recovery before failing init - octeon: add support for block mode operations - pasemi: add support for unjam device feature - riic: add support for bus recovery New device support: - MediaTek Dimensity 1200 (MT6893) - Sophgo SG2044 - Renesas RZ/V2N (R9A09G056) - Rockchip RK3528 - AMD ISP (new driver)" * tag 'i2c-for-6.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (89 commits) i2c: Use str_read_write() helper i2c: mlxbf: avoid 64-bit division i2c: viai2c-wmt: Replace dev_err() with dev_err_probe() in probe function i2c: designware: Don't warn about missing get_clk_rate_khz i2c: designware: Invoke runtime suspend on quick slave re-registration i2c-mlxbf: Improve I2C bus timing configuration i2c-mlxbf: Add repeated start condition support i2c: xgene-slimpro: Replace dev_err() with dev_err_probe() in probe function dt-bindings: i2c: i2c-wmt: Convert to YAML i2c: microchip-corei2c: add smbus support i2c: mlxbf: Allow build with COMPILE_TEST i2c: I2C_DESIGNWARE_AMDISP should depend on DRM_AMD_ISP i2c: atr: add passthrough flag i2c: atr: add static flag i2c: atr: allow replacing mappings in attach_addr() i2c: atr: deduplicate logic in attach_addr() i2c: atr: do not create mapping in detach_addr() i2c: atr: split up i2c_atr_get_mapping_by_addr() i2c: atr: find_mapping() -> get_mapping() i2c: atr: Fix lockdep for nested ATRs ...

i2c: Switch to irq_domain_create_linear()

2025-05-16T19:06:09+00:00

irq_domain_add_linear() is going away as being obsolete now. Switch to the preferred irq_domain_create_linear(). That differs in the first parameter: It takes more generic struct fwnode_handle instead of struct device_node. Therefore, of_fwnode_handle() is added around the parameter. Note some of the users can likely use dev->fwnode directly instead of indirect of_fwnode_handle(dev->of_node). But dev->fwnode is not guaranteed to be set for all, so this has to be investigated on case to case basis (by people who can actually test with the HW). [ tglx: Fix up subject prefix ] Signed-off-by: Jiri Slaby (SUSE) Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/all/20250319092951.37667-20-jirislaby@kernel.org