# I2C configuration options # Copyright (c) 2015 Intel Corporation # SPDX-License-Identifier: Apache-2.0 # # I2C options # menuconfig I2C bool "Inter-Integrated Circuit (I2C) bus drivers" help Enable I2C Driver Configuration if I2C config I2C_SHELL bool "I2C Shell" depends on SHELL help Enable I2C Shell. The I2C shell supports scanning, bus recovery, I2C read and write operations. config I2C_STATS bool "I2C device Stats" depends on STATS help Enable I2C Stats. config I2C_DUMP_MESSAGES bool "Log I2C transactions" depends on LOG depends on I2C_LOG_LEVEL_DBG help Dump every I2C transaction to the system log as debug level log messages. config I2C_DUMP_MESSAGES_ALLOWLIST bool "Use allowlist for logging of I2C transactions" depends on I2C_DUMP_MESSAGES depends on DT_HAS_ZEPHYR_I2C_DUMP_ALLOWLIST_ENABLED help Use allowlist to specify which devices transactions should be logged. The allowlist is defined in the devicetree using the compatible string of "zephyr,i2c-dump-allowlist" and phandles to the devices that need to be traced. Example of devicetree node: i2c-dump-allowlist { compatible = "zephyr,i2c-dump-allowlist"; devices = < &display0 >, < &sensor3 >; }; config I2C_CALLBACK bool "I2C asynchronous callback API" help API and implementations of i2c_transfer_cb. config I2C_ALLOW_NO_STOP_TRANSACTIONS bool "Allows I2C transfers with no STOP on the last transaction [DEPRECATED]" depends on !I2C_NRFX_TWI depends on !I2C_NRFX_TWIM depends on !I2C_STM32 depends on !I2C_GD32 depends on !I2C_ESP32 depends on (!I2C_DW || I2C_RTS5912) select DEPRECATED help Allow I2C transactions with no STOP on the last message. This is unsupported and can leave the bus in an unexpected state. The option will be removed in Zephyr 4.1. config I2C_RTIO bool "I2C RTIO API" select EXPERIMENTAL select RTIO select RTIO_WORKQ help API and implementations of I2C for RTIO if I2C_RTIO config I2C_RTIO_SQ_SIZE int "Submission queue size for blocking calls" default 4 help Blocking i2c calls when I2C_RTIO is enabled are copied into a per driver submission queue. The queue depth determines the number of possible i2c_msg structs that may be in the array given to i2c_transfer. A sensible default is going to be 4 given the device address, register address, and a value to be read or written. config I2C_RTIO_CQ_SIZE int "Completion queue size for blocking calls" default 4 help Blocking i2c calls when I2C_RTIO is enabled are copied into a per driver submission queue. The queue depth determines the number of possible i2c_msg structs that may be in the array given to i2c_transfer. A sensible default is going to be 4 given the device address, register address, and a value to be read or written. config I2C_RTIO_FALLBACK_MSGS int "Number of available i2c_msg structs for the default handler to use" default 4 help When RTIO is used with a driver that does not yet implement the submit API natively the submissions are converted back to struct i2c_msg values that are given to i2c_transfer. This requires some number of msgs be available to convert the submissions into on the stack. MISRA rules dictate we must know this in advance. In all likelihood 4 is going to work for everyone, but in case you do end up with an issue where you are using RTIO, your driver does not implement submit natively, and get an error relating to not enough i2c msgs this is the Kconfig to manipulate. endif # I2C_RTIO # Include these first so that any properties (e.g. defaults) below can be # overridden (by defining symbols in multiple locations) source "drivers/i2c/target/Kconfig" # zephyr-keep-sorted-start source "drivers/i2c/Kconfig.ambiq" source "drivers/i2c/Kconfig.andes_atciic100" source "drivers/i2c/Kconfig.b91" source "drivers/i2c/Kconfig.bcm_iproc" source "drivers/i2c/Kconfig.cc13xx_cc26xx" source "drivers/i2c/Kconfig.cdns" source "drivers/i2c/Kconfig.dw" source "drivers/i2c/Kconfig.ene" source "drivers/i2c/Kconfig.esp32" source "drivers/i2c/Kconfig.gd32" source "drivers/i2c/Kconfig.gpio" source "drivers/i2c/Kconfig.i2c_emul" source "drivers/i2c/Kconfig.ifx_cat1" source "drivers/i2c/Kconfig.ifx_xmc4" source "drivers/i2c/Kconfig.it51xxx" source "drivers/i2c/Kconfig.it8xxx2" source "drivers/i2c/Kconfig.litex" source "drivers/i2c/Kconfig.lpc11u6x" source "drivers/i2c/Kconfig.max32" source "drivers/i2c/Kconfig.mchp_mss" source "drivers/i2c/Kconfig.mcux" source "drivers/i2c/Kconfig.npcx" source "drivers/i2c/Kconfig.nrfx" source "drivers/i2c/Kconfig.numaker" source "drivers/i2c/Kconfig.omap" source "drivers/i2c/Kconfig.rcar" source "drivers/i2c/Kconfig.renesas_ra" source "drivers/i2c/Kconfig.renesas_rz" source "drivers/i2c/Kconfig.rts5912" source "drivers/i2c/Kconfig.sam0" source "drivers/i2c/Kconfig.sam_twihs" source "drivers/i2c/Kconfig.sbcon" source "drivers/i2c/Kconfig.sc18im704" source "drivers/i2c/Kconfig.sedi" source "drivers/i2c/Kconfig.sifive" source "drivers/i2c/Kconfig.smartbond" source "drivers/i2c/Kconfig.stm32" source "drivers/i2c/Kconfig.sy1xx" source "drivers/i2c/Kconfig.tca954x" source "drivers/i2c/Kconfig.test" source "drivers/i2c/Kconfig.wch" source "drivers/i2c/Kconfig.xec" source "drivers/i2c/Kconfig.xilinx_axi" # zephyr-keep-sorted-stop config I2C_INIT_PRIORITY int "Init priority" default KERNEL_INIT_PRIORITY_DEVICE help I2C device driver initialization priority. module = I2C module-str = i2c source "subsys/logging/Kconfig.template.log_config" config I2C_GECKO bool "Gecko I2C driver" default y depends on DT_HAS_SILABS_GECKO_I2C_ENABLED select SOC_GECKO_I2C select PINCTRL if SOC_FAMILY_SILABS_S2 help Enable the SiLabs Gecko I2C bus driver. config I2C_SAM_TWIM bool "Atmel SAM (TWIM) I2C driver" default y depends on DT_HAS_ATMEL_SAM_I2C_TWIM_ENABLED select PINCTRL help Enable Atmel SAM MCU Family (TWIM) I2C bus driver. config I2C_SAM_TWI bool "Atmel SAM (TWI) I2C driver" default y depends on DT_HAS_ATMEL_SAM_I2C_TWI_ENABLED select PINCTRL help Enable Atmel SAM MCU Family (TWI) I2C bus driver. config I2C_MCUX bool "MCUX I2C driver" default y depends on DT_HAS_NXP_KINETIS_I2C_ENABLED select PINCTRL help Enable the mcux I2C driver. config I2C_MCUX_LPI2C bool "MCUX LPI2C driver" default y depends on DT_HAS_NXP_LPI2C_ENABLED depends on CLOCK_CONTROL select PINCTRL help Enable the mcux LPI2C driver. config I2C_MCUX_LPI2C_BUS_RECOVERY bool "Bus recovery support" depends on I2C_MCUX_LPI2C && PINCTRL select I2C_BITBANG help Enable LPI2C driver bus recovery support via GPIO bitbanging. config I2C_IMX bool "i.MX I2C driver" default y depends on DT_HAS_FSL_IMX21_I2C_ENABLED select PINCTRL help Enable the i.MX I2C driver. config I2C_CC32XX bool "CC32XX I2C driver" default y depends on DT_HAS_TI_CC32XX_I2C_ENABLED select PINCTRL help Enable the CC32XX I2C driver. config I2C_BITBANG bool help Enable library used for software driven (bit banging) I2C support config I2C_NIOS2 bool "Nios-II I2C driver" default y depends on DT_HAS_ALTR_NIOS2_I2C_ENABLED help Enable the Nios-II I2C driver. config I2C_RV32M1_LPI2C bool "RV32M1 LPI2C driver" default y depends on DT_HAS_OPENISA_RV32M1_LPI2C_ENABLED depends on CLOCK_CONTROL select PINCTRL help Enable the RV32M1 LPI2C driver. config GPIO_I2C_SWITCH bool "GPIO controlled I2C bus switch" default y depends on DT_HAS_GPIO_I2C_SWITCH_ENABLED help Enable GPIO controlled I2C bus switch driver. config I2C_NXP_II2C bool "NXP i.MX8M serial I2C driver" default y depends on DT_HAS_NXP_II2C_ENABLED help Enable the NXP II2C driver. endif # I2C