In the mainline, there is no case to support the suspend-to-RAM for Samsung Exynos SoC. This patchset support the suspend-to-RAM for 64bit Exynos SoC. For 32bit, arch/arm/mach-exynos/* directoy contains the suspend-related codes such as suspend.c/exynos.c. But, 64bit Exynos should contain the suspend-related codes in the drivers/soc/samsung/*. So, this patchset develop the patch4/5 for drivers/soc/samsung/exynos-pm.c. to support suspend 64bit Exynos SoC. But, I'm not sure what is proper approach for both 32/64bit Exynos. - Approach1 : Split out the supend-related codes between 32/64bit. : arch/arm/mach-exynos/* contains the suspend-related codes for 32bit. : drivers/soc/samsung/* contains the suspend-related codes for 64bit. - Approach2 : Consolidate the all suspend-related codes to drivers/soc/samsung/. Please let us know your opinion. The patch1/2/3 and 6/7/8/9 is just general patch. So, I add 'RFC' prefix to only cover-letter, patch4/5. If you want to add the 'RFC' prefix to all patches, I'll add 'RFC' prefix on v2. Based on: - git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux.git (branch: for-next) Need to discuss patch4/5: - patch4: soc: samsung: Add generic power-management driver for Exynos - patch5: soc: samsung: pm: Add support for suspend-to-ram of Exynos5433 [Remaining Issues] - The hang-out happen when disabling the MMC clocks on dw_mmc.c. I reported to Jaehoon Chung. He is checking this issue. To test the suspend-to-ram temporarily, you need to add CLK_IS_CRITICAL flag to 'aclk_mmc2/aclk_mmc0/sclk_mmc2/sclk_mmc0'. - I enabled the at least kernel configuration in order to test the suspend-to-RAM. So, I need to test it more time with DRM/Multimedia and other. But, the suspend-to-RAM of cpu is successful. - Exynos5433 SoC has two EXYNOS5433_EINT_WAKEUP_MASKx registers. The pinctr-exynos.c need to handle the extra EINT_WAKEUP_MASKx for Exynos5433. The suspend-to-ram test is failed on first time and then next tryout is ok. I'm developing it. Chanwoo Choi (9): clk: samsung: exynos5433: Add clock flag to support suspend-to-ram soc: samsung: pmu: Add powerup_conf callback soc: samsung: pmu: Add the PMU data of exynos5433 to support low-power state soc: samsung: Add generic power-management driver for Exynos soc: samsung: pm: Add support for suspend-to-ram of Exynos5433 arm64: dts: exynos: Add iRAM device-tree node for Exynos5433 arm64: dts: exynos: Use power key as a wakeup source on TM2/TM2E board arm64: dts: exynos: Add cpu_suspend property of PSCI for exynos5433 arm64: dts: exynos: Add cpu topology information for Exynos5433 SoC arch/arm/mach-exynos/common.h | 3 - arch/arm/mach-exynos/exynos.c | 23 +- .../boot/dts/exynos/exynos5433-tm2-common.dtsi | 1 + arch/arm64/boot/dts/exynos/exynos5433.dtsi | 47 ++++ drivers/clk/samsung/clk-exynos5433.c | 22 +- drivers/soc/samsung/Makefile | 5 +- drivers/soc/samsung/exynos-pm.c | 214 +++++++++++++++ drivers/soc/samsung/exynos-pmu.c | 9 + drivers/soc/samsung/exynos-pmu.h | 3 + drivers/soc/samsung/exynos5433-pmu.c | 286 +++++++++++++++++++++ include/linux/soc/samsung/exynos-pm.h | 21 ++ include/linux/soc/samsung/exynos-pmu.h | 1 + include/linux/soc/samsung/exynos-regs-pmu.h | 148 +++++++++++ 13 files changed, 745 insertions(+), 38 deletions(-) create mode 100644 drivers/soc/samsung/exynos-pm.c create mode 100644 drivers/soc/samsung/exynos5433-pmu.c create mode 100644 include/linux/soc/samsung/exynos-pm.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
