From: Andrey Panov <rockford@yandex.ru>
To: barebox@lists.infradead.org
Subject: [PATCH] MMC: IMX: Reset MMC_BOOT register after controller reset.
Date: Sat, 17 Jan 2015 15:54:35 +0300 [thread overview]
Message-ID: <1421499275-3280-1-git-send-email-rockford@yandex.ru> (raw)
This helps with EMMC detection when booting from EMMC directly.
Taken from u-boot.
Signed-off-by: Andrey Panov <rockford@yandex.ru>
---
drivers/mci/imx-esdhc.c | 3 +++
drivers/mci/sdhci.h | 1 +
2 files changed, 4 insertions(+)
diff --git a/drivers/mci/imx-esdhc.c b/drivers/mci/imx-esdhc.c
index 239cd37..23bdc1f 100644
--- a/drivers/mci/imx-esdhc.c
+++ b/drivers/mci/imx-esdhc.c
@@ -471,6 +471,9 @@ static int esdhc_init(struct mci_host *mci, struct device_d *dev)
esdhc_write32(regs + SDHCI_CLOCK_CONTROL__TIMEOUT_CONTROL__SOFTWARE_RESET,
SYSCTL_HCKEN | SYSCTL_IPGEN);
+ /* RSTA doesn't reset MMC_BOOT register, so manually reset it */
+ esdhc_write32(regs + SDHCI_MMC_BOOT, 0);
+
/* Set the initial clock speed */
set_sysctl(mci, 400000);
diff --git a/drivers/mci/sdhci.h b/drivers/mci/sdhci.h
index b678184..82a692e 100644
--- a/drivers/mci/sdhci.h
+++ b/drivers/mci/sdhci.h
@@ -18,6 +18,7 @@
#define SDHCI_SIGNAL_ENABLE 0x38
#define SDHCI_ACMD12_ERR__HOST_CONTROL2 0x3C
#define SDHCI_CAPABILITIES 0x40
+#define SDHCI_MMC_BOOT 0xC4
#define COMMAND_CMD(x) ((x & 0x3f) << 24)
#define COMMAND_CMDTYP_NORMAL 0x0
--
2.1.4
_______________________________________________
barebox mailing list
barebox@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/barebox
next reply other threads:[~2015-01-17 12:55 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-17 12:54 Andrey Panov [this message]
2015-01-19 7:38 ` Sascha Hauer
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=1421499275-3280-1-git-send-email-rockford@yandex.ru \
--to=rockford@yandex.ru \
--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