This driver parse the reboot commands like "reboot loader" and "reboot recovery" to get a boot mode described in the device tree , then call the corresponding write interface to store the boot mode magic value in some persistent storage like special register or ram , which can be read by the bootloader after system reboot. This is commonly used on Android based devices, which in order to reboot the device into fastboot or recovery mode. Before this patch , I have try some hack on[0], and then found John Stultz also doing the same work[1]. As John is busy these days, I go on with this work. [0]https://patchwork.kernel.org/patch/7647751/ [1]https://patchwork.kernel.org/patch/7802391/ Changes in v2: - move to dir drivers/power/reset/ - make syscon-reboot-mode a generic driver - make this DT node as a subnode of PMU/PMUGRF Changes in v1: - fix the embarrassed compile warning - correct the maskrom magic number - check for the normal reboot - correct the maskrom magic number - use macro defined in rockchip_boot-mode.h for reboot-mode DT node Andy Yan (4): dt-bindings: power: reset: add document for reboot-mode driver power: reset: add reboot mode driver ARM: dts: rockchip: add syscon-reboot-mode node ARM64: dts: rockchip: add syscon-reboot-mode DT node .../bindings/power/reset/reboot-mode.txt | 41 +++++++++ .../bindings/power/reset/syscon-reboot-mode.txt | 52 +++++++++++ arch/arm/boot/dts/rk3288.dtsi | 31 +++++++ arch/arm/boot/dts/rk3xxx.dtsi | 33 ++++++- arch/arm64/boot/dts/rockchip/rk3368.dtsi | 33 ++++++- drivers/power/reset/Kconfig | 16 ++++ drivers/power/reset/Makefile | 2 + drivers/power/reset/reboot-mode.c | 100 +++++++++++++++++++++ drivers/power/reset/reboot-mode.h | 6 ++ drivers/power/reset/syscon-reboot-mode.c | 62 +++++++++++++ include/dt-bindings/soc/rockchip_boot-mode.h | 30 +++++++ 11 files changed, 404 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/power/reset/reboot-mode.txt create mode 100644 Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.txt create mode 100644 drivers/power/reset/reboot-mode.c create mode 100644 drivers/power/reset/reboot-mode.h create mode 100644 drivers/power/reset/syscon-reboot-mode.c create mode 100644 include/dt-bindings/soc/rockchip_boot-mode.h -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
