linux-kernel - Re: [PATCH V2 00/12] LP0 entry and exit support for Tegra210

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Date:   Wed, 29 May 2019 16:12:09 +0200
From:   Thierry Reding <thierry.reding@...il.com>
To:     Sowjanya Komatineni <skomatineni@...dia.com>
Cc:     jonathanh@...dia.com, tglx@...utronix.de, jason@...edaemon.net,
        marc.zyngier@....com, linus.walleij@...aro.org, stefan@...er.ch,
        mark.rutland@....com, pdeschrijver@...dia.com, pgaikwad@...dia.com,
        sboyd@...nel.org, linux-clk@...r.kernel.org,
        linux-gpio@...r.kernel.org, jckuo@...dia.com, josephl@...dia.com,
        talho@...dia.com, linux-tegra@...r.kernel.org,
        linux-kernel@...r.kernel.org, mperttunen@...dia.com,
        spatra@...dia.com, robh+dt@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH V2 00/12] LP0 entry and exit support for Tegra210

On Tue, May 28, 2019 at 04:08:44PM -0700, Sowjanya Komatineni wrote:
> This patch series includes Tegra210 deepsleep/LP0 support with
> deep sleep exit through RTC alarm wake and power button wake events.
> 
> Note: Wake on power button is through gpio-keys node in device tree.

On the Jetson TX2 patches for LP0 support we added a couple of other
properties that we don't have in the Jetson TX1 device tree yet. For
example:

	linux,input-type = <EV_KEY>;

which is probably harmless, but we may want to add it on Jetson TX1
eventually anyway.

	debounce-interval = <10>;

May be good an Jetson TX1 as well.

	wakeup-event-action = <EV_ACT_ASSERTED>;

I vaguely recall this to be necessary for some reason, but I may be
wrong.

Thierry

> 
> This series also includes save and restore of PLLs, clocks, OSC contexts
> for basic LP0 exit.
> 
> This patch series doesn't support 100% suspend/resume to allow fully
> functional state upon resume and we are working on some more drivers suspend
> and resume implementations.
> 
> [V2] : V1 feedback fixes
> 	Patch 0002: This version still using syscore. Thierry suggest not to
> 	use syscore and waiting on suggestion from Linux Walleij for any better
> 	way of storing current state of pins before suspend entry and restoring
> 	them on resume at very early stage. So left this the same way as V1 and
> 	will address once I get more feedback on this.
> 	Also need to findout and implement proper way of forcing resume order
> 	between pinctrl and gpio driver.
> 
> 
> Sowjanya Komatineni (12):
>   irqchip: tegra: do not disable COP IRQ during suspend
>   pinctrl: tegra: add suspend and resume support
>   clk: tegra: save and restore PLLs state for system
>   clk: tegra: add support for peripheral clock suspend and resume
>   clk: tegra: add support for OSC clock resume
>   clk: tegra: add suspend resume support for DFLL clock
>   clk: tegra: support for Tegra210 clocks suspend-resume
>   soc/tegra: pmc: allow support for more tegra wake models
>   soc/tegra: pmc: add pmc wake support for tegra210
>   gpio: tegra: implement wake event support for Tegra210 and prior GPIO
>   arm64: tegra: enable wake from deep sleep on RTC alarm.
>   soc/tegra: pmc: configure tegra deep sleep control settings
> 
>  arch/arm64/boot/dts/nvidia/tegra210-p2180.dtsi |   7 +
>  arch/arm64/boot/dts/nvidia/tegra210.dtsi       |   5 +-
>  drivers/clk/tegra/clk-dfll.c                   |  82 ++++++
>  drivers/clk/tegra/clk-dfll.h                   |   2 +
>  drivers/clk/tegra/clk-divider.c                |  19 ++
>  drivers/clk/tegra/clk-pll-out.c                |  25 ++
>  drivers/clk/tegra/clk-pll.c                    |  99 +++++--
>  drivers/clk/tegra/clk-tegra-fixed.c            |  16 ++
>  drivers/clk/tegra/clk-tegra210.c               | 382 +++++++++++++++++++++++++
>  drivers/clk/tegra/clk.c                        |  74 ++++-
>  drivers/clk/tegra/clk.h                        |  13 +
>  drivers/gpio/gpio-tegra.c                      | 116 +++++++-
>  drivers/irqchip/irq-tegra.c                    |  22 +-
>  drivers/pinctrl/tegra/pinctrl-tegra.c          |  68 ++++-
>  drivers/pinctrl/tegra/pinctrl-tegra.h          |   3 +
>  drivers/pinctrl/tegra/pinctrl-tegra114.c       |   1 +
>  drivers/pinctrl/tegra/pinctrl-tegra124.c       |   1 +
>  drivers/pinctrl/tegra/pinctrl-tegra20.c        |   1 +
>  drivers/pinctrl/tegra/pinctrl-tegra210.c       |   1 +
>  drivers/pinctrl/tegra/pinctrl-tegra30.c        |   1 +
>  drivers/soc/tegra/pmc.c                        | 150 +++++++++-
>  21 files changed, 1053 insertions(+), 35 deletions(-)
> 
> -- 
> 2.7.4
> 

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