6ec7c4a2 - pmdomain: thead: fix TH1520_AON_PROTOCOL dependency

Fri, 14 Mar 2025 15:48:31 +0000

pmdomain: thead: fix TH1520_AON_PROTOCOL dependencyKconfig treats the dependency as optional, but the header file only providesnormal declarations and no empty API stubs:ld: fs/btrfs/extent_io.o: in function `writepage_delalloc':extent_io.c:(.text+0x2b42): undefined reference to `__udivdi3'ld: drivers/pmdomain/thead/th1520-pm-domains.o: in function `th1520_pd_power_off':th1520-pm-domains.c:(.text+0x57): undefined reference to `th1520_aon_power_update'ld: drivers/pmdomain/thead/th1520-pm-domains.o: in function `th1520_pd_power_on':th1520-pm-domains.c:(.text+0x8a): undefined reference to `th1520_aon_power_update'ld: drivers/pmdomain/thead/th1520-pm-domains.o: in function `th1520_pd_probe':th1520-pm-domains.c:(.text+0xb8): undefined reference to `th1520_aon_init'ld: th1520-pm-domains.c:(.text+0x1c6): undefined reference to `th1520_aon_power_update'Since the firmware code can easily be enabled for compile testing, thereis no need to add stubs either, so just make it a hard dependency.Fixes: dc9a897dbb03 ("pmdomain: thead: Add power-domain driver for TH1520")Signed-off-by: Arnd Bergmann Reviewed-by: Michal Wilczynski Link: https://lore.kernel.org/r/20250314154834.4053416-1-arnd@kernel.orgSigned-off-by: Ulf Hansson List of files: /linux-6.15/drivers/pmdomain/thead/Kconfig

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/Kconfig

Changes in Kconfig

6ec7c4a2 - pmdomain: thead: fix TH1520_AON_PROTOCOL dependency

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