u-boot.git/drivers/i2c, branch next

Merge tag 'i2c-updates-for-2026.10-next' of https://git.u-boot-project.org/u-boot/custodians/hs/u-boot-i2c into next

2026-08-25T17:37:49Z

i2c updates for 2026.10-next - i2c/clk: spacemit: k1: fix I2C bus configuration and clock handling from Junhui Reviewed by Yao Zi and myself.

i2c: k1: enable both functional and bus clocks

2026-08-25T06:22:24Z

The K1 I2C controller requires both its functional clock and APB bus clock to operate. The device tree provides them as "func" and "bus", but the driver currently acquires and enables only the first clock. Acquire both clocks by name and enable them during probe. Use explicit named lookups instead of the bulk clock API to align with the K1 Linux driver and keep the roles of the two clocks clear if functional clock rate configuration is needed later. Fixes: 271546fb8e54 ("i2c: k1: add I2C driver support") Reviewed-by: Heiko Schocher Reviewed-by: Yao Zi Signed-off-by: Junhui Liu

i2c: k1: fix wrong bus speed setting

2026-08-25T06:22:24Z

The controller bus mode should be selected according to the requested I2C bus speed. However, the driver currently passes the functional clock rate to k1_i2c_set_bus_speed(), so the selected mode does not reflect the requested bus speed. Fix this by reading the clock-frequency property from the Device Tree, defaulting to standard speed, and drop the unused clk_rate field. Fixes: 271546fb8e54 ("i2c: k1: add I2C driver support") Reviewed-by: Heiko Schocher Reviewed-by: Yao Zi Signed-off-by: Junhui Liu

i2c: mtk_mt8195_i2c_ddc: add new driver

2026-08-13T15:03:57Z

Add a new driver for HDMI DDC channel reading for MT8195 based SoCs. The driver is based on the corresponding kernel driver. Signed-off-by: Pavlo Yadvychuk Signed-off-by: Julien Stephan Reviewed-by: Heiko Schocher Link: https://patch.msgid.link/20260727-mt8188-add-ddc-i2c-driver-v2-2-bf1c45fcd588@baylibre.com Signed-off-by: David Lechner

i2c: geni: reset controller on NACK to recover from invalid bus state

2026-08-07T12:47:08Z

During i2c probe, repeated accesses to non-existent slave addresses generate consecutive NACK responses. On GENI I2C controllers, these back-to-back error conditions leaves the controller in an invalid or busy state, especially at lower bus frequencies (100 kHz and 400 kHz). As a result, subsequent transfers fails and valid slave addresses are not detected. Currently, controller recovery is triggered only on timeout errors. However, NACK conditions (-EREMOTEIO) can lead to the same stale bus state. Handle -EREMOTEIO similar to -ETIMEDOUT by issuing a command abort before starting the next transfer. This ensures the controller state machine is reset and the bus is returned to a known good state. This improves reliability of i2c probe and allows correct detection of slave devices under repeated probing conditions. Signed-off-by: Aswin Murugan

i2c: k1: add I2C driver support

2026-07-21T08:57:13Z

Add I2C driver support on Spacemit K1 SoC using driver model. Signed-off-by: Raymond Mao Signed-off-by: Guodong Xu Reviewed-by: Heiko Schocher Tested-by: Songsong Zhang

treewide: Kconfig: use bool instead of tristate

2026-07-10T21:45:57Z

U-Boot does not support modules, so having tristate options is useless. Therefore this patch does a blind replace of all tristate options to bool tree-wide. Signed-off-by: Anshul Dalal Reviewed-by: Heiko Schocher Reviewed-by: Quentin Schulz Reviewed-by: Siddharth Vadapalli Reviewed-by: Neha Malcom Francis Reviewed-by: Romain Gantois Reviewed-by: Simon Glass

i2c: designware: fix i2c probe error

2026-07-08T09:23:25Z

Probing i2c slave device just needs its device address. A certain type of chipsets such as RTC S35390A have no offset, which means address length should be 0. But the current designware_i2c_probe_chip function requires offset 0 and its length 1. This causes the designware-i2c to be initialized again and again. Furthermore, after booting into kernel, the designware-i2c kernel driver complains its controller timeout. This patch fixes this misbehaviour in such way that only device address is issued, no reinitialization needs when target device not detected, the designware-i2c kernel driver continues working. Signed-off-by: Coben Han

i2c: nx: Add License

2026-07-08T09:23:10Z

Add License information for nx_i2c driver. Signed-off-by: Peng Fan Reviewed-by: Heiko Schocher

i2c: nx: Use dev_read_addr_ptr()

2026-07-08T09:22:48Z

Use dev_read_addr_ptr() which supports both live device tree and flat DT backends, avoiding direct dependency on devfdt_* helpers. No functional changes. Signed-off-by: Peng Fan Reviewed-by: Heiko Schocher