[RFC PATCH 0/9] soc: samsung: Add support of suspend-to-RAM on Exynos5433
cw00.choi at samsung.com
Mon Jan 8 23:58:57 PST 2018
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.
- 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
- 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
- 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
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