From: Jon Hunter <jonathanh@nvidia.com>
To: Aniruddha Rao <anrao@nvidia.com>, <adrian.hunter@intel.com>,
<ulf.hansson@linaro.org>, <thierry.reding@gmail.com>,
<p.zabel@pengutronix.de>
Cc: <linux-mmc@vger.kernel.org>, <linux-tegra@vger.kernel.org>,
<linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] mmc: tegra: Add Runtime PM callbacks
Date: Tue, 28 Jul 2020 15:12:21 +0100 [thread overview]
Message-ID: <b0c41edb-e9cc-2c36-be21-e52e80577c97@nvidia.com> (raw)
In-Reply-To: <1595854036-15434-1-git-send-email-anrao@nvidia.com>
On 27/07/2020 13:47, Aniruddha Rao wrote:
> Add runtime suspend/resume callbacks to save power
> when the bus is not in use.
> In runtime suspend
> - Turn off the SDMMC host CAR clock.
> - Turn off the trimmer/DLL circuit(BG) power supply(VREG).
> - Turn off the SDMMC host internal clocks.
>
> Re-enable all the disabled clocks/regulators in runtime resume.
>
> Signed-off-by: Aniruddha Rao <anrao@nvidia.com>
This patch is causing a boot regression on Tegra20 Ventana. Other boards
appear to be booting fine, but this is breaking something for Tegra20.
The bootlogs don't appear to show any particular crash, but I see a hang
when initialising the sdhci controllers.
Cheers
Jon
--
nvpublic
next prev parent reply other threads:[~2020-07-28 14:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-27 12:47 [PATCH] mmc: tegra: Add Runtime PM callbacks Aniruddha Rao
2020-07-27 13:10 ` Dmitry Osipenko
2020-07-28 14:12 ` Jon Hunter [this message]
2020-08-24 7:20 ` Ulf Hansson
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