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commit 14b02bd6dcc3c2c9a2952f65463bb36b5aa85a7e Author: Matteo Golin <[email protected]> AuthorDate: Sat Jun 20 13:11:50 2026 -0400 raspberrypi-4b/i2c: Added I2C configuration Includes a new I2C configuration (and documentation for it) to use the I2C1 bus on the Raspberry Pi 4B. Signed-off-by: Matteo Golin <[email protected]> --- .../arm64/bcm2711/boards/raspberrypi-4b/index.rst | 9 ++++ .../bcm2711/raspberrypi-4b/configs/i2c1/defconfig | 59 ++++++++++++++++++++++ 2 files changed, 68 insertions(+) diff --git a/Documentation/platforms/arm64/bcm2711/boards/raspberrypi-4b/index.rst b/Documentation/platforms/arm64/bcm2711/boards/raspberrypi-4b/index.rst index 06594075912..8c8c2d3178b 100644 --- a/Documentation/platforms/arm64/bcm2711/boards/raspberrypi-4b/index.rst +++ b/Documentation/platforms/arm64/bcm2711/boards/raspberrypi-4b/index.rst @@ -221,6 +221,15 @@ This configuration boots directly into the :doc:`coremark </applications/benchmarks/coremark/index>` benchmark and displays the results of the test over the serial console. +i2c1 +---- + +This configuration enables the I2C1 bus on GPIO 2 and 3 (the standard I2C bus +for the Raspberry Pi 4B). It includes the :doc:`i2ctool +</applications/system/i2c/index>` application for playing with the bus. Note +that you will want to pass the `-b 1` flag to the tool the first time you use +it, as the default bus is 0. + ostest ------ diff --git a/boards/arm64/bcm2711/raspberrypi-4b/configs/i2c1/defconfig b/boards/arm64/bcm2711/raspberrypi-4b/configs/i2c1/defconfig new file mode 100644 index 00000000000..a60387663b2 --- /dev/null +++ b/boards/arm64/bcm2711/raspberrypi-4b/configs/i2c1/defconfig @@ -0,0 +1,59 @@ +# +# This file is autogenerated: PLEASE DO NOT EDIT IT. +# +# You can use "make menuconfig" to make any modifications to the installed .config file. +# You can then do "make savedefconfig" to generate a new defconfig file that includes your +# modifications. +# +# CONFIG_NDEBUG is not set +CONFIG_ARCH="arm64" +CONFIG_ARCH_ARM64=y +CONFIG_ARCH_BOARD="raspberrypi-4b" +CONFIG_ARCH_BOARD_RASPBERRYPI_4B=y +CONFIG_ARCH_CHIP="bcm2711" +CONFIG_ARCH_CHIP_BCM2711=y +CONFIG_ARCH_EARLY_PRINT=y +CONFIG_ARCH_INTERRUPTSTACK=4096 +CONFIG_ARCH_IRQPRIO=y +CONFIG_BCM2711_I2C1=y +CONFIG_BCM2711_I2C=y +CONFIG_BCM2711_I2C_DRIVER=y +CONFIG_BOARD_LOOPSPERMSEC=132954 +CONFIG_BUILTIN=y +CONFIG_DEBUG_FULLOPT=y +CONFIG_DEBUG_SYMBOLS=y +CONFIG_DEFAULT_TASK_STACKSIZE=8192 +CONFIG_EXAMPLES_HELLO=y +CONFIG_EXPERIMENTAL=y +CONFIG_FS_PROCFS=y +CONFIG_FS_ROMFS=y +CONFIG_HAVE_CXX=y +CONFIG_HAVE_CXXINITIALIZE=y +CONFIG_IDLETHREAD_STACKSIZE=8192 +CONFIG_INIT_ENTRYPOINT="nsh_main" +CONFIG_INTELHEX_BINARY=y +CONFIG_NSH_BUILTIN_APPS=y +CONFIG_NSH_FILEIOSIZE=512 +CONFIG_NSH_READLINE=y +CONFIG_PREALLOC_TIMERS=4 +CONFIG_PTHREAD_STACK_MIN=8192 +CONFIG_RAMLOG=y +CONFIG_RAM_SIZE=4227858432 +CONFIG_RAM_START=0x00000000 +CONFIG_RAW_BINARY=y +CONFIG_READLINE_CMD_HISTORY=y +CONFIG_RR_INTERVAL=200 +CONFIG_SCHED_HPWORK=y +CONFIG_SCHED_HPWORKPRIORITY=192 +CONFIG_SPINLOCK=y +CONFIG_STACK_COLORATION=y +CONFIG_START_MONTH=11 +CONFIG_START_YEAR=2022 +CONFIG_SYMTAB_ORDEREDBYNAME=y +CONFIG_SYSTEM_I2CTOOL=y +CONFIG_SYSTEM_NSH=y +CONFIG_SYSTEM_SYSTEM=y +CONFIG_TESTING_GETPRIME=y +CONFIG_TESTING_OSTEST=y +CONFIG_USEC_PER_TICK=1000 +CONFIG_USERLED=y
