From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Subject: [PATCH] ata: sata-imx: Add delay to prevent link timeout
Date: Thu, 23 Jul 2015 15:19:38 +0200 [thread overview]
Message-ID: <1437657578-17979-1-git-send-email-s.hauer@pengutronix.de> (raw)
On the Utilite board this delay is necessary to prevent a link timeout.
It seems the values written to GPR13 have to settle for some time before
further accesses may be made.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/ata/sata-imx.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/ata/sata-imx.c b/drivers/ata/sata-imx.c
index 42a56dc..612762e 100644
--- a/drivers/ata/sata-imx.c
+++ b/drivers/ata/sata-imx.c
@@ -37,6 +37,8 @@ static int imx6_sata_init(struct imx_ahci *imx_ahci)
writel(val, base + IOMUXC_GPR13);
writel(val | 2, base + IOMUXC_GPR13);
+ udelay(100);
+
return 0;
}
--
2.1.4
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
reply other threads:[~2015-07-23 13:20 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1437657578-17979-1-git-send-email-s.hauer@pengutronix.de \
--to=s.hauer@pengutronix.de \
--cc=barebox@lists.infradead.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox