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From: Andre Heider <a.heider@gmail.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH REPOST] ARM: rpi_b: power on SDHCI and USB HW modules
Date: Fri, 6 Dec 2013 14:37:38 +0100	[thread overview]
Message-ID: <20131206133738.GA50279@localhost> (raw)
In-Reply-To: <1386129715-5820-1-git-send-email-swarren@wwwdotorg.org>

Hi Stephen,

On Tue, Dec 03, 2013 at 09:01:55PM -0700, Stephen Warren wrote:
> Send RPC commands to the VideoCore to turn on the SDHCI and USB modules.
> For SDHCI this isn't needed in practice, since the firmware already
> turned on the power in order to load U-Boot. However, it's best to be
> explicit. For USB, this is necessary, since the module isn't powered
> otherwise. This will allow the kernel USB driver to work.

I didn't test this patch yet, but from skimming over it it looks similar to
what I tried with barebox a while back.

What I did notice with the "set power" mbox call is that it takes way longer
than 100ms (the current mbox call timeout) to finish on a cold boot. You
don't seem to bump the timeout here, and with 100ms I always hit it and
hence the mbox call failed for me. Don't you get these huge delays?

Regards,
Andre

  parent reply	other threads:[~2013-12-06 13:37 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-12-04  4:01 [U-Boot] [PATCH REPOST] ARM: rpi_b: power on SDHCI and USB HW modules Stephen Warren
2013-12-05 17:50 ` Stephen Warren
2013-12-06 13:37 ` Andre Heider [this message]
2013-12-06 19:19   ` Stephen Warren
2013-12-07  4:50   ` Stephen Warren
2013-12-09 19:52     ` Andre Heider
2013-12-09 20:16       ` Stephen Warren
2013-12-09 20:35         ` Andre Heider

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