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2021-11-12lib: utils/i2c: Add minimal SiFive I2C driverNikita Shubin
Minimum SiFive 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. Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
2021-11-12lib: utils/i2c: Add simple FDT based I2C frameworkNikita Shubin
FDT based I2C framework on the top of I2C library. The drivers are probed on demand by fdt_i2c_adapter_get function. Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Signed-off-by: Nikita Shubin <n.shubin@yadro.com>
2021-11-12lib: utils/i2c: Add generic I2C configuration libraryNikita Shubin
Helper library to keep track of registered I2C adapters, identified by dts offset, basic send/read functions and adapter configuration (enable, set dividers, etc...). Tested-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com> Reviewed-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Tested-by: Alexandre Ghiti <alexandre.ghiti@canonical.com> Signed-off-by: Nikita Shubin <n.shubin@yadro.com>