Linux kernel stable tree (mirror) https://git.radix-linux.su/kernel/linux.git/atom?h=v6.19.11 2025-03-13T13:41:32+00:00 2025-03-13T13:41:32+00:00 Michal Wilczynski m.wilczynski@samsung.com 2025-03-11T17:18:57+00:00 urn:sha1:e4b3cbd840e565484d0ad8d260d27c057466ed17 The T-Head TH1520 SoC uses an E902 co-processor running Always-On (AON) firmware to manage power, clock, and other system resources [1]. This patch introduces a driver implementing the AON firmware protocol, allowing the Linux kernel to communicate with the firmware via mailbox channels. Through an RPC-based interface, the kernel can initiate power state transitions, update resource configurations, and perform other AON-related tasks. [1] Link: https://openbeagle.org/beaglev-ahead/beaglev-ahead/-/blob/main/docs/TH1520%20System%20User%20Manual.pdf Signed-off-by: Michal Wilczynski <m.wilczynski@samsung.com> Acked-by: Drew Fustini <drew@pdp7.com> Link: https://lore.kernel.org/r/20250311171900.1549916-3-m.wilczynski@samsung.com Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>