Rework Arduino IO hardware - #691
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Detect the board revision from system information and select the matching device tree for revised Advanced PG2 and M2 boards during SPL and U-Boot boot. Add the revised board device trees to the U-Boot build and include the support patch in the IOT2050 recipe. Signed-off-by: Baocheng Su <baocheng.su@siemens.com>
Add DTBs for the revised Arduino connector on Advanced M2 and PG2 boards. Share the M2 board configuration between the original and revised variants while keeping the existing DTB names unchanged. Signed-off-by: Baocheng Su <baocheng.su@siemens.com>
Add GPIO character device v2 support to mraa and select the appropriate IOT2050 pinmux configuration based on the board revision. Signed-off-by: Baocheng Su <baocheng.su@siemens.com>
Add the revised Advanced PG2 and Advanced M2 board names to the firmware update package configuration. Signed-off-by: Baocheng Su <baocheng.su@siemens.com>
Allow users to prevent selected Arduino I/O pins from being configured during boot. Add configuration persistence and an interactive selection menu, and support revised Advanced M2 board names in the M.2 connector menu. Signed-off-by: Baocheng Su <baocheng.su@siemens.com>
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| + status = "okay"; | ||
| +}; | ||
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| +&mcu_spi0 { |
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Shall we also add status = "okay"?
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The hardware design of the Arduino IO will be changed in next revision of the hardware of the PG2 Advanced & M.2 variants.
The new hardware will use the I2C IO expander directly to single the GPIO. Only GPIO is changed.
This requires the new SEBoot with the new "rev" field of the boardinfo to be workable, which is in the backlog and will be submitted soon.