Hi Simon, Magnus, The ROHM BD9571MWV PMIC on the Renesas Salvator-X(S) and ULCB development boards supports DDR Backup Power, which means that the DDR power rails can be kept powered while the main SoC is powered down. This patch series is the DT counterpart of the series "[PATCH v2 0/4] regulator: bd9571mwv: Add support for DDR backup mode" [1] and "[PATCH/RFC 0/2] regulator: bd9571mwv: Add support for toggle power switches" [2]. The first patch adds the missing device node for the BD9571 PMIC on the ULCB boards, and can be applied immediately. The last two patches add DDR Backup Mode configuration, and depend on the DT bindings in the driver patch being accepted. Changes compared to v2: - Add support for ULCB, - Add "rohm,rstbmode-level" for Salvator-X(S). This has been tested on M3ULCB (thanks Jacopo!), and on Salvator-X(S). For testing, driver and DTS patches are available in the topic/bd9571-ddr-backup-mode-driver-v2 and topic/bd9571-ddr-backup-mode-dt-v2 branches of my renesas-drivers git repository at git://git.kernel.org/pub/scm/linux/kernel/git/geert/renesas-drivers.git. Thanks for your comments! [1] https://lkml.org/lkml/2018/3/14/302 [2] https://lkml.org/lkml/2018/3/14/324 Geert Uytterhoeven (3): arm64: dts: renesas: ulcb: Add BD9571 PMIC arm64: dts: renesas: salvator-common: Configure PMIC for DDR Backup Power arm64: dts: renesas: ulcb: Configure PMIC for DDR Backup Power arch/arm64/boot/dts/renesas/salvator-common.dtsi | 2 ++ arch/arm64/boot/dts/renesas/ulcb.dtsi | 31 ++++++++++++++++++++++++ 2 files changed, 33 insertions(+) -- 2.7.4 Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx 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
