From: Stephen Warren <swarren-3lzwWm7+Weoh9ZMKESR00Q@public.gmane.org>
To: Joseph Lo <josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Cc: Peter De Schrijver
<pdeschrijver-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>,
linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org
Subject: Re: [PATCH V2] ARM: tegra30: fix power up sequence for boot_secondary
Date: Thu, 03 Jan 2013 10:19:33 -0700 [thread overview]
Message-ID: <50E5BDA5.6040505@wwwdotorg.org> (raw)
In-Reply-To: <1357198291-16500-1-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
On 01/03/2013 12:31 AM, Joseph Lo wrote:
> The power up sequence is different on the cold boot CPU and the CPU
> that resumed from the hotplug. For the cold boot CPU, it was been power
> gated as default. To power up the cold boot CPU, the power should be
> un-gated by un toggling the power gate register manually.
>
> For the CPU that resumed from the hotplug, after un-halted the CPU. The
> flow controller will un-gate the power of the CPU. No need to manually
> control, just wait the power be resumed and continue the power up
> sequence after the CPU power is ready.
>
> Based on the work by:
> Varun Wadekar <vwadekar-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
Applied to Tegra's for-3.9/soc branch.
WARNING: multiple messages have this Message-ID (diff)
From: swarren@wwwdotorg.org (Stephen Warren)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V2] ARM: tegra30: fix power up sequence for boot_secondary
Date: Thu, 03 Jan 2013 10:19:33 -0700 [thread overview]
Message-ID: <50E5BDA5.6040505@wwwdotorg.org> (raw)
In-Reply-To: <1357198291-16500-1-git-send-email-josephl@nvidia.com>
On 01/03/2013 12:31 AM, Joseph Lo wrote:
> The power up sequence is different on the cold boot CPU and the CPU
> that resumed from the hotplug. For the cold boot CPU, it was been power
> gated as default. To power up the cold boot CPU, the power should be
> un-gated by un toggling the power gate register manually.
>
> For the CPU that resumed from the hotplug, after un-halted the CPU. The
> flow controller will un-gate the power of the CPU. No need to manually
> control, just wait the power be resumed and continue the power up
> sequence after the CPU power is ready.
>
> Based on the work by:
> Varun Wadekar <vwadekar@nvidia.com>
Applied to Tegra's for-3.9/soc branch.
next prev parent reply other threads:[~2013-01-03 17:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-03 7:31 [PATCH V2] ARM: tegra30: fix power up sequence for boot_secondary Joseph Lo
2013-01-03 7:31 ` Joseph Lo
[not found] ` <1357198291-16500-1-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2013-01-03 17:19 ` Stephen Warren [this message]
2013-01-03 17:19 ` Stephen Warren
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