opensbi.git/lib/utils/i2c, branch master

lib: utils/i2c: add minimal SpacemiT I2C driver

2026-05-11T13:51:31Z

Add a simple SpacemiT I2C driver for basic byte transfers over the I2C bus, prioritizing simplicity over performance. The driver operates in PIO mode and does not use interrupts, FIFO, or DMA. The controller is reset at the start of each transaction to ensure a known initial state, regardless of prior configuration by the kernel. This also avoids the need for additional error recovery code. This will be used for communication with onboard PMIC to reset and power-off the board. Signed-off-by: Aurelien Jarno Tested-by: Anand Moon Link: https://lore.kernel.org/r/20260419150857.2705843-2-aurelien@aurel32.net Signed-off-by: Anup Patel

lib: utils/i2c: Use fdt_driver for initialization

2024-11-28T12:08:05Z

The i2c driver subsystem does not need any extra data, so it can use `struct fdt_driver` directly. It always initializes the driver for a specific DT node. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

treewide: Make carray arrays const and NULL-terminated

2024-11-28T11:39:17Z

This allows the compiler to generate significantly better code, because it does not have to maintain either the loop counter or loop limit. Plus there are half as many symbols to relocate. This also simplifies passing carray arrays to helper functions. Signed-off-by: Samuel Holland Reviewed-by: Anup Patel

lib: utils/i2c: Constify FDT pointers in parsing functions

2024-08-24T07:32:28Z

Indicate that none of these functions modify the devicetree by constifying the parameter type. Signed-off-by: Samuel Holland Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

Makefile: change to using .carray.c for carray files

2024-07-04T06:41:45Z

We would like to clean any files generated by the carray scripts by just searching for the filename as the current make system turns f.carray into f.o. Change to make the make system turn f.carray into f.carray.o note, command to go through .mk files changing the .o in the .mk files is: find . -type f -name "*.carray" | xargs -t -I fname /bin/bash -x -c ' fn=`basename -s .carray fname`; echo "$fn"; sed -i `dirname fname `/objects.mk -e s/"$fn".o/"$fn".carray.o/g' Link: https://patchwork.ozlabs.org/project/opensbi/patch/20240401213438.590209-2-ivan.orlov0322@gmail.com/ Reported-by: Ivan Orlov Suggested-by: Andrew Jones Signed-off-by: Ben Dooks Reviewed-by: Andrew Jones Reviewed-by: Anup Patel

include: sbi_utils: Remove driver pointer from struct i2c_adapter

2023-07-31T08:39:06Z

The "driver" pointer in struct i2c_adapter is not used anywhere so let us remove it. Signed-off-by: Anup Patel Reviewed-by: Xiang W

lib: utils/i2c: Use heap in DesignWare and SiFive I2C drivers

2023-06-05T10:25:45Z

Let's use heap allocation in DesignWare and SiFive I2C drivers instead of using a fixed size global array. Signed-off-by: Anup Patel Reviewed-by: Andrew Jones

lib: utils/i2c: Add minimal StarFive jh7110 I2C driver

2023-03-09T15:30:57Z

Starfive JH7110 I2C IP is synopsys designware. Minimum StarFIve I2C driver to read/send bytes over I2C bus. This allows querying information and perform operation of onboard PMIC, as well as power-off and reset. Signed-off-by: Minda Chen Reviewed-by: Anup Patel

lib: utils/fdt: Use kconfig for enabling/disabling

2022-08-08T04:04:08Z

We update FDT support makefile to use kconfig for enabling/disabling. To avoid compilation errors, we also enable FDT for each platform. Signed-off-by: Anup Patel Tested-by: Andrew Jones Acked-by: Atish Patra Tested-by: Atish Patra

lib: utils/i2c: Use kconfig for enabling/disabling drivers

2022-08-08T04:03:57Z

We update i2c drivers makefile to use kconfig for enabling/disabling drivers. To avoid compile errors, we also enable appropriate i2c drivers for each platform. Signed-off-by: Anup Patel Tested-by: Andrew Jones Acked-by: Atish Patra Tested-by: Atish Patra