From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Warren Subject: Re: [PATCH V2] ARM: tegra30: fix power up sequence for boot_secondary Date: Thu, 03 Jan 2013 10:19:33 -0700 Message-ID: <50E5BDA5.6040505@wwwdotorg.org> References: <1357198291-16500-1-git-send-email-josephl@nvidia.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1357198291-16500-1-git-send-email-josephl-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> Sender: linux-tegra-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Joseph Lo Cc: Peter De Schrijver , linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: linux-tegra@vger.kernel.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 Applied to Tegra's for-3.9/soc branch. From mboxrd@z Thu Jan 1 00:00:00 1970 From: swarren@wwwdotorg.org (Stephen Warren) Date: Thu, 03 Jan 2013 10:19:33 -0700 Subject: [PATCH V2] ARM: tegra30: fix power up sequence for boot_secondary In-Reply-To: <1357198291-16500-1-git-send-email-josephl@nvidia.com> References: <1357198291-16500-1-git-send-email-josephl@nvidia.com> Message-ID: <50E5BDA5.6040505@wwwdotorg.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.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 Applied to Tegra's for-3.9/soc branch.