Hi Simon, Magnus, Recent R-Car Gen3 SoCs added an External Request Mask Register to the System Controller (SYSC). This register allows to mask external power requests for CPU or 3DG domains, to prevent conflicts when Linux changes the state of a power domain through SYSC, which could lead to system lock-ups.
This RFC patch series starts making use of this register. Note that the register is optional, and that its location and contents are SoC-specific. This was inspired by a patch in the BSP by Dien Pham <[email protected]>. This has been boot-tested on R-Car H3 ES1.0, H3 ES2.0, M3-W ES1.0, M3-N, V3M, and E3 (only the last 3 have this register!), and regression-tested on R-Car Gen2. This has not been tested on R-Car H3 ES3.0, M3-W ES2.0, and V3H. Thanks for your comments! Geert Uytterhoeven (7): soc: renesas: rcar-sysc: Prepare for fixing power request conflicts soc: renesas: r8a7795-sysc: Fix power request conflicts soc: renesas: r8a7796-sysc: Fix power request conflicts soc: renesas: r8a77965-sysc: Fix power request conflicts soc: renesas: r8a77970-sysc: Fix power request conflicts soc: renesas: r8a77980-sysc: Fix power request conflicts soc: renesas: r8a77990-sysc: Fix power request conflicts drivers/soc/renesas/r8a7795-sysc.c | 32 ++++++++++++++++++++++++----- drivers/soc/renesas/r8a7796-sysc.c | 22 +++++++++++++++++++- drivers/soc/renesas/r8a77965-sysc.c | 3 +++ drivers/soc/renesas/r8a77970-sysc.c | 3 +++ drivers/soc/renesas/r8a77980-sysc.c | 3 +++ drivers/soc/renesas/r8a77990-sysc.c | 3 +++ drivers/soc/renesas/rcar-sysc.c | 16 +++++++++++++++ drivers/soc/renesas/rcar-sysc.h | 7 +++++-- 8 files changed, 81 insertions(+), 8 deletions(-) -- 2.17.1 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- [email protected] In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
