From: "Andrii.Tseglytskyi" <andrii.tseglytskyi@xxxxxx> Following patch series introduces the Adaptive Body-Bias LDO driver, which handles LDOs voltage during OPP change routine. Current implementation is based on patch series from Mike Turquette: http://marc.info/?l=linux-omap&m=134931341818379&w=2 ABB transition is a part of OPP changing sequence. ABB can operate in the following modes: - Bypass mode: Activated when ABB is not required - FBB mode: Fast Body Bias mode, used on fast OPPs - RBB mode: Reverse Body Bias mode, used on slow OPPs In current implementation ABB is converted to regulator. Standalone OPP table is used to store ABB mode, it is defined in device tree for each ABB regulator. It has the following format: operating-points = < /* uV ABB (0 - Bypass, 1 - FBB, 2 - RBB) */ 880000 0 1060000 1 1250000 1 1260000 1 >; ABB regulator is linked to regulator chain. Related discussions: regulator: query on regulator re-entrance http://marc.info/?l=linux-omap&m=136513861315970&w=2 regulator: core: introduce regulator chain locking scheme https://patchwork.kernel.org/patch/2445091/ clk: notifier handler for dynamic voltage scaling https://lkml.org/lkml/2013/2/27/414 Andrii.Tseglytskyi (6): ARM: dts: OMAP36xx: add device tree for ABB ARM: dts: OMAP4: add device tree for ABB ARM: dts: OMAP5: add device tree for ABB ARM: OMAP3+: ABB: add aliases for sysclk used in ABB driver ARM: OMAP3+: ABB: introduce ABB driver ARM: OMAP3+: ABB: introduce debugfs entry Documentation/devicetree/bindings/power/abb.txt | 38 ++ arch/arm/boot/dts/omap36xx.dtsi | 20 + arch/arm/boot/dts/omap4.dtsi | 22 + arch/arm/boot/dts/omap443x.dtsi | 23 + arch/arm/boot/dts/omap446x.dtsi | 39 ++ arch/arm/boot/dts/omap5.dtsi | 39 ++ arch/arm/mach-omap2/cclock3xxx_data.c | 1 + arch/arm/mach-omap2/cclock44xx_data.c | 2 + drivers/regulator/Kconfig | 6 + drivers/regulator/Makefile | 1 + drivers/regulator/abb-regulator.c | 710 +++++++++++++++++++++++ 11 files changed, 901 insertions(+) create mode 100644 Documentation/devicetree/bindings/power/abb.txt create mode 100644 arch/arm/boot/dts/omap446x.dtsi create mode 100644 drivers/regulator/abb-regulator.c -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
