[opentitan] Integrate OpenTitan Peripherals#11

Draft

viv-eth wants to merge 19 commits intopulp-platform:develfrom viv-eth:vivianep/opentitan-peripherals

+590-25

Commits on Dec 19, 2024

[toolchain] Move to LLVM toolchain to support OpenTitan peripherals
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[drivers] Add OpenTitan as external project to SDK
viv-eth
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[drivers] Sparse checkout of OpenTitan sources
viv-eth
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[drivers] Compile OpenTitan sources into STATIC lib
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[opentitan] Remove superfluous CXX Standard flag
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[cmake] Remove duplicate lines
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[drivers] Improve OpenTitan Integration and Adjust Build System
viv-eth
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[drivers] Recursively add .c files to OpenTitan sources
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[drivers] Link OT drivers against host runtime
viv-eth
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[OT] remove superfluous dependency
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[OT] Select commit hash on target-level for OT drivers
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[cmake] Remove OT drivers from top level
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Commits on Dec 21, 2024

[drivers] Refactor OT peripherals on driver-level
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[gitignore] Add all thirdparty folders
viv-eth
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Commits on Dec 23, 2024

[cmake] Switch to CMAKE_C_STANDARD 11 for static assertions
viv-eth
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[drivers] Enable always build for OT periphs
viv-eth
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[drivers] Enable UART for host only atm to test HAL and avoid ABI conflicts
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[hal] WIP: Integrate picolibc and UART HAL testing
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[targets] chimera-open: remove UART_VERSION macro for clarity
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