[RFC PATCH 0/3] ARM64: meson-gxbb: Add support for system suspend
mark.rutland at arm.com
Thu Nov 3 08:25:46 PDT 2016
On Thu, Nov 03, 2016 at 03:29:22PM +0100, Neil Armstrong wrote:
> Thie patchset is a very experiment patchset to support the System Suspend
> feature of the Amlogic Meson GX SoCs.
> These SoCs implements system suspend using a non-standard PSCI CPU_SUSPEND
> parameter to enter system suspend.
This sounds like a violation of the CPU_SUSPEND semantics.
> A small driver is added to properly fill the platform_suspend_ops and make
> to correct SMC call.
Ignoring the fact that this is a blatant violation of the PSCI CPU_SUSPEND
semantics, this certainly should not be a separate driver.
> In order to wake up from an alarm, these SoCs have a special memory mapped
> register where an alarm time delay in seconds is stored.
> In order to reuse the RTC wakealarm feature, implement a fake RTC device
> that uses the system time to calculate a delay to write to the register.
> Note that this RFC is here to seek a better way to handle these platform
> specific features.
> Neil Armstrong (3):
> ARM64: meson: Add Amlogic Meson GX PM Suspend
> rtc: Add Amlogic Virtual Wake RTC
> ARM64: dts: meson-gxbb: Add support for PM and Virtual RTC
> arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 9 ++
> drivers/firmware/meson/Kconfig | 6 +
> drivers/firmware/meson/Makefile | 1 +
> drivers/firmware/meson/meson_gx_pm.c | 86 +++++++++++++++
> drivers/rtc/Kconfig | 10 ++
> drivers/rtc/Makefile | 1 +
> drivers/rtc/rtc-meson-vrtc.c | 164 ++++++++++++++++++++++++++++
> 7 files changed, 277 insertions(+)
> create mode 100644 drivers/firmware/meson/meson_gx_pm.c
> create mode 100644 drivers/rtc/rtc-meson-vrtc.c
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