dc9a897d - pmdomain: thead: Add power-domain driver for TH1520

Tue, 11 Mar 2025 17:18:59 +0000

pmdomain: thead: Add power-domain driver for TH1520The T-Head TH1520 SoC contains multiple power islands that can beprogrammatically turned on and off using the AON (Always-On) protocoland a hardware mailbox [1]. The relevant mailbox driver has already beenmerged into the mainline kernel in commit 5d4d263e1c6b ("mailbox:Introduce support for T-head TH1520 Mailbox driver");Introduce a power-domain driver for the TH1520 SoC, which is using AONfirmware protocol to communicate with E902 core through the hardwaremailbox. This way it can send power on/off commands to the E902 core.The interaction with AUDIO power island e.g trying to turn it OFF provedto crash the firmware running on the E902 core. Introduce the workaroundto disable interacting with the power island.[1]Link: https://openbeagle.org/beaglev-ahead/beaglev-ahead/-/blob/main/docs/TH1520%20System%20User%20Manual.pdfSigned-off-by: Michal Wilczynski Acked-by: Drew Fustini Link: https://lore.kernel.org/r/20250311171900.1549916-5-m.wilczynski@samsung.comSigned-off-by: Ulf Hansson List of files: /linux-6.15/drivers/pmdomain/thead/Makefile

Changes in Makefile

dc9a897d - pmdomain: thead: Add power-domain driver for TH1520