From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
To: Joseph Lo <josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
Mike Turquette
<mturquette-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org>
Subject: Re: [PATCH 3/8] clk: tegra114: add LP1 suspend/resume support
Date: Mon, 29 Jul 2013 16:51:53 -0600 [thread overview]
Message-ID: <51F6F209.2090309@wwwdotorg.org> (raw)
In-Reply-To: <1374830110-30685-4-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
On 07/26/2013 03:15 AM, Joseph Lo wrote:
> When the system suspends to LP1, the clock of the CPU would be switched to
> CLK_M (12MHz Oscillator) during suspend/resume flow. The clock driver
> needs to restore the clock of CPU after LP1 resume.
It's unclear to me how the code change implements "restore the clock of
the CPU". A register name of CCLKG_BURST_POLICY doesn't sound like it's
anything to do with enabled/disabling the CPU clock, nor configuring its
rate. What exactly does this register do, and hence what does this new
code actually restore?
Why don't Tegra20/30 need a similar change?
WARNING: multiple messages have this Message-ID (diff)
From: swarren@wwwdotorg.org (Stephen Warren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 3/8] clk: tegra114: add LP1 suspend/resume support
Date: Mon, 29 Jul 2013 16:51:53 -0600 [thread overview]
Message-ID: <51F6F209.2090309@wwwdotorg.org> (raw)
In-Reply-To: <1374830110-30685-4-git-send-email-josephl@nvidia.com>
On 07/26/2013 03:15 AM, Joseph Lo wrote:
> When the system suspends to LP1, the clock of the CPU would be switched to
> CLK_M (12MHz Oscillator) during suspend/resume flow. The clock driver
> needs to restore the clock of CPU after LP1 resume.
It's unclear to me how the code change implements "restore the clock of
the CPU". A register name of CCLKG_BURST_POLICY doesn't sound like it's
anything to do with enabled/disabling the CPU clock, nor configuring its
rate. What exactly does this register do, and hence what does this new
code actually restore?
Why don't Tegra20/30 need a similar change?
next prev parent reply other threads:[~2013-07-29 22:51 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-26 9:15 [PATCH 0/8] ARM: tegra: support LP1 suspend mode Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-1-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-26 9:15 ` [PATCH 1/8] ARM: tegra: add common resume handling code for LP1 resuming Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-2-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-29 22:38 ` Stephen Warren
2013-07-29 22:38 ` Stephen Warren
2013-07-26 9:15 ` [PATCH 2/8] ARM: tegra: config the polarity of the request of sys clock Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-3-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-29 22:47 ` Stephen Warren
2013-07-29 22:47 ` Stephen Warren
[not found] ` <51F6F109.8010102-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-02 7:48 ` Joseph Lo
2013-08-02 7:48 ` Joseph Lo
[not found] ` <1375429739.6761.31.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-02 20:24 ` Stephen Warren
2013-08-02 20:24 ` Stephen Warren
[not found] ` <51FC1579.50100-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-05 8:42 ` Joseph Lo
2013-08-05 8:42 ` Joseph Lo
2013-07-26 9:15 ` [PATCH 3/8] clk: tegra114: add LP1 suspend/resume support Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-4-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-29 22:51 ` Stephen Warren [this message]
2013-07-29 22:51 ` Stephen Warren
[not found] ` <51F6F209.2090309-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-02 8:09 ` Joseph Lo
2013-08-02 8:09 ` Joseph Lo
[not found] ` <1375430985.6761.51.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-02 20:32 ` Stephen Warren
2013-08-02 20:32 ` Stephen Warren
[not found] ` <51FC1751.9010401-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-05 8:02 ` Joseph Lo
2013-08-05 8:02 ` Joseph Lo
[not found] ` <1375689749.1731.36.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-05 17:00 ` Stephen Warren
2013-08-05 17:00 ` Stephen Warren
[not found] ` <51FFDA20.6050403-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-05 17:39 ` Stephen Warren
2013-08-05 17:39 ` Stephen Warren
[not found] ` <51FFE363.4080603-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-06 9:10 ` Joseph Lo
2013-08-06 9:10 ` Joseph Lo
[not found] ` <1375780249.2261.63.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-06 18:37 ` Stephen Warren
2013-08-06 18:37 ` Stephen Warren
[not found] ` <52014258.9070602-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-07 9:12 ` Joseph Lo
2013-08-07 9:12 ` Joseph Lo
[not found] ` <1375866749.8111.57.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-07 16:46 ` Stephen Warren
2013-08-07 16:46 ` Stephen Warren
[not found] ` <520279FC.1000006-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-08 2:23 ` Joseph Lo
2013-08-08 2:23 ` Joseph Lo
[not found] ` <1375928591.1758.66.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-08 19:54 ` Stephen Warren
2013-08-08 19:54 ` Stephen Warren
[not found] ` <5203F766.9050100-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-09 9:23 ` Joseph Lo
2013-08-09 9:23 ` Joseph Lo
2013-08-06 9:19 ` Joseph Lo
2013-08-06 9:19 ` Joseph Lo
2013-07-26 9:15 ` [PATCH 4/8] ARM: tegra: add common LP1 suspend support Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-5-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-29 23:13 ` Stephen Warren
2013-07-29 23:13 ` Stephen Warren
[not found] ` <51F6F725.6000106-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-02 9:27 ` Joseph Lo
2013-08-02 9:27 ` Joseph Lo
[not found] ` <1375435620.6761.120.camel-yx3yKKdKkHfc7b1ADBJPm0n48jw8i0AO@public.gmane.org>
2013-08-02 20:40 ` Stephen Warren
2013-08-02 20:40 ` Stephen Warren
2013-08-05 8:07 ` Joseph Lo
2013-08-05 8:07 ` Joseph Lo
2013-07-26 9:15 ` [PATCH 5/8] ARM: tegra30: add " Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-6-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-29 23:45 ` Stephen Warren
2013-07-29 23:45 ` Stephen Warren
[not found] ` <51F6FE89.4060402-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-05 6:46 ` Joseph Lo
2013-08-05 6:46 ` Joseph Lo
2013-07-26 9:15 ` [PATCH 6/8] ARM: tegra20: " Joseph Lo
2013-07-26 9:15 ` Joseph Lo
2013-07-26 9:15 ` [PATCH 7/8] ARM: tegra114: " Joseph Lo
2013-07-26 9:15 ` Joseph Lo
[not found] ` <1374830110-30685-8-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-07-29 23:53 ` Stephen Warren
2013-07-29 23:53 ` Stephen Warren
[not found] ` <51F7007F.6090200-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
2013-08-05 6:51 ` Joseph Lo
2013-08-05 6:51 ` Joseph Lo
2013-07-26 9:15 ` [PATCH 8/8] ARM: dts: tegra: enable LP1 suspend mode Joseph Lo
2013-07-26 9:15 ` Joseph Lo
2013-07-27 16:12 ` [PATCH 0/8] ARM: tegra: support " Marc Dietrich
2013-07-27 16:12 ` Marc Dietrich
2013-07-27 16:20 ` Dmitry Osipenko
2013-07-27 16:20 ` Dmitry Osipenko
[not found] ` <51F3F356.8080709-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-07-27 18:09 ` Marc Dietrich
2013-07-27 18:09 ` Marc Dietrich
2013-07-27 18:26 ` Dmitry Osipenko
2013-07-27 18:26 ` Dmitry Osipenko
[not found] ` <51F410BE.3000904-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2013-07-27 18:29 ` Dmitry Osipenko
2013-07-27 18:29 ` Dmitry Osipenko
2013-07-27 19:03 ` Marc Dietrich
2013-07-27 19:03 ` Marc Dietrich
2013-07-27 19:11 ` Dmitry Osipenko
2013-07-27 19:11 ` Dmitry Osipenko
2013-07-30 9:49 ` Joseph Lo
2013-07-30 9:49 ` Joseph Lo
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