From: Sascha Hauer <s.hauer@pengutronix.de>
To: Barebox List <barebox@lists.infradead.org>
Cc: Ahmad Fatoum <a.fatoum@pengutronix.de>
Subject: [PATCH] mmc: atmel: Make write work on sama5d3
Date: Fri, 2 Nov 2018 10:11:56 +0100 [thread overview]
Message-ID: <20181102091156.26476-1-s.hauer@pengutronix.de> (raw)
For some reason the sama5d3 needs a delay after a
MMC_CMD_STOP_TRANSMISSION command. Without it writing fails with:
ERROR: atmel_mci f0000000.mmc@f0000000: command/data timeout
ERROR: atmel_mci f0000000.mmc@f0000000: command/data timeout
The reason is not yet clear, so live with this hack for now.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
drivers/mci/atmel_mci.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/mci/atmel_mci.c b/drivers/mci/atmel_mci.c
index 0d3b245ced..122d999087 100644
--- a/drivers/mci/atmel_mci.c
+++ b/drivers/mci/atmel_mci.c
@@ -468,6 +468,10 @@ static int atmci_request(struct mci_host *mci, struct mci_cmd *cmd, struct mci_d
}
stat = atmci_poll_status(host, ATMCI_CMDRDY);
+
+ if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION)
+ mdelay(5);
+
return atmci_cmd_done(host, stat);
}
--
2.19.1
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next reply other threads:[~2018-11-02 9:12 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-02 9:11 Sascha Hauer [this message]
2018-11-02 9:14 ` Sascha Hauer
2022-12-13 14:13 ` Ahmad Fatoum
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