This is fourth iteration of my patch series adding ASV (Adaptive Supply Voltage) support for Exynos SoCs. The previous one can be found at: https://lkml.org/lkml/2019/8/13/808 Major change since v3 is a conversion to use dev_pm_opp_adjust_voltage(), rather than removing and adding an OPP again. Hence the series now depends on patch [1]. I have included here a patch to address review comments "opp: Handle target/min/max voltage in dev_pm_opp_adjust_voltage()", which could be squashed with patch [1]. The CHIPID patches are dropped from the series as they have already been merged. The patch set is based on for-next branch, git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git Tested on Odroid XU3, XU3 Lite, XU4. One of the things on TODO list is support for the Adaptive Body Bias. This would require modifications on the cpufreq driver side in order to support multiple voltage regulators as well as changes in the OPP framework to support adding OPPs with multiple voltages. [1] "[v4, 6/8] PM / OPP: Support adjusting OPP voltages at runtime" https://lore.kernel.org/linux-arm-kernel/1565703113-31479-7-git-send-email-andrew-sh.cheng@xxxxxxxxxxxx Sylwester Nawrocki (6): opp: Handle target/min/max voltage in dev_pm_opp_adjust_voltage() dt-bindings: samsung: Update the CHIP ID binding documentation soc: samsung: Add Exynos Adaptive Supply Voltage driver ARM: EXYNOS: Enable exynos-asv driver for ARCH_EXYNOS ARM: dts: Add "syscon" compatible string to chipid node ARM: dts: Add samsung,asv-bin property for odroidxu3-lite .../bindings/arm/samsung/exynos-chipid.txt | 10 +- arch/arm/boot/dts/exynos5.dtsi | 4 +- .../boot/dts/exynos5422-odroidxu3-lite.dts | 4 + arch/arm/mach-exynos/Kconfig | 1 + drivers/opp/core.c | 10 +- drivers/soc/samsung/Kconfig | 10 + drivers/soc/samsung/Makefile | 3 + drivers/soc/samsung/exynos-asv.c | 179 ++++++ drivers/soc/samsung/exynos-asv.h | 82 +++ drivers/soc/samsung/exynos5422-asv.c | 509 ++++++++++++++++++ drivers/soc/samsung/exynos5422-asv.h | 25 + include/linux/pm_opp.h | 3 +- 12 files changed, 833 insertions(+), 7 deletions(-) create mode 100644 drivers/soc/samsung/exynos-asv.c create mode 100644 drivers/soc/samsung/exynos-asv.h create mode 100644 drivers/soc/samsung/exynos5422-asv.c create mode 100644 drivers/soc/samsung/exynos5422-asv.h -- 2.17.1
