On Exynos-based boards running secure firmware the sequence of low level operations to enter and leave system-wide sleep mode is different than on those without the firmware. Namely: - CP15 power control and diagnostic registers cannot be written directly, - the way of setting boot address and boot flag is different, - different resume handler needs to be used (generic cpu_resume() vs exynos_cpu_resume()), - dedicated SMC call needs to be performed instead of letting the CPU enter WFI. This series introduces .suspend() and .resume() firmware operations to perform low level firmware-specific suspend and resume and then leverages them to provide suspend-resume path meeting the above requirements. The series is based on Kgene's for-next branch and tested on Exynos4412-based Trats2 board (with few board-specific fixes that will be sent separately) and Exynos4210-based Trats board (without any extra patches). Tomasz Figa (2): ARM: firmware: Introduce suspend and resume operations ARM: EXYNOS: Add support for firmware-assisted suspend/resume Documentation/arm/firmware.txt | 28 +++++------------------- arch/arm/include/asm/firmware.h | 8 +++++++ arch/arm/mach-exynos/firmware.c | 47 +++++++++++++++++++++++++++++++++++++++++ arch/arm/mach-exynos/pm.c | 16 +++++++++----- 4 files changed, 71 insertions(+), 28 deletions(-) -- 1.9.3 -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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