This series adds support for EEPROM SoM detection used by different PHYTEC SoMs. The EEPROM data consist of 32 bytes containing information like PCB revision, RAM size and other SoM specific configuration.
For SoMs of the i.MX8M family the data is written to two areas of the used i2c EEPROM.
We initally add the detection support for phyCORE-i.MX8MP. Due to layout constraints phyCORE-i.MX8MP SoMs with PCB revision 2 and older can only make use of a lower RAM frequency. This changes with the use of newer PCB revisions. We make use of the factory flashed EEPROM data to detect the PCB revision and select the fitting RAM settings.
Teresa
Teresa Remmet (6): board: phytec: Add common PHYTEC SoM detection board: phytec: common: Add imx8m specific EEPROM detection support board: phytec: phycore-imx8mp: Add EEPROM detection initialisation board: phytec: phycore_imx8mp: Update 2GB RAM Timings board: phytec: common: phytec_som_detection: Add helper for PCB revision board: phytec: phycore_imx8mp: Add 4000MTS RAM timings based on PCB rev
board/phytec/common/Kconfig | 13 + board/phytec/common/Makefile | 11 + board/phytec/common/imx8m_som_detection.c | 169 ++++++++++++ board/phytec/common/imx8m_som_detection.h | 54 ++++ board/phytec/common/phytec_som_detection.c | 203 ++++++++++++++ board/phytec/common/phytec_som_detection.h | 109 ++++++++ board/phytec/phycore_imx8mp/Kconfig | 1 + board/phytec/phycore_imx8mp/lpddr4_timing.c | 278 ++++++++++---------- board/phytec/phycore_imx8mp/spl.c | 80 ++++++ configs/phycore-imx8mp_defconfig | 1 + 10 files changed, 776 insertions(+), 143 deletions(-) create mode 100644 board/phytec/common/Kconfig create mode 100644 board/phytec/common/Makefile create mode 100644 board/phytec/common/imx8m_som_detection.c create mode 100644 board/phytec/common/imx8m_som_detection.h create mode 100644 board/phytec/common/phytec_som_detection.c create mode 100644 board/phytec/common/phytec_som_detection.h