Got GPIO kernel driver working in esp32s3 xtensa linux, and with that bitbanged SPI and I2C. Can scan i2c bus with i2cdetect. Got an example i2c accelerometer working in the kernel iio framework.

c++ exceptions and c cleanup routines are now working in the xtensa FDPIC toolchain. TLS and NPTL are next.

Got linux-6.7-rc8 + userspace running on esp32 with 4M FLASH and 4M PSRAM. It took some time to find a workaround for the unfortunate default FLASH mapping. Build script: github.com/jcmvbkbc/esp32…

xtensa gcc switches from reload to LRA thanks to Takayuki 'January June' Suwa.

xtensa FDPIC toolchain gets initial TLS and NPTL support with uClibc-ng. New linux builds for esp32s3 and esp32 will have it enabled by default. xtensa FDPIC support in musl libc is next.

Xtensa FDPIC ABI draft RFC: gcc.gnu.org/pipermail/gcc/…

A couple new changes in the esp32-linux-build scripts: - update to linux-6.11 and buildroot-2024.08 - new configuration for the Espressif Box-3 supporting SPI display and USB host controller

Linus Torvalds on bad hardware architectures: lore.kernel.org/all/CAHk-=wji-… xtensa scores a lot of points in that list with confidence and a few more as optional features.