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From: Trent Piepho <tpiepho@kymetacorp.com>
To: barebox <barebox@lists.infradead.org>
Subject: [PATCH 4/4] mci: dw_mmc: Add support for high speed modes
Date: Wed, 18 Nov 2015 21:14:30 +0000	[thread overview]
Message-ID: <1447881271.4553.176.camel@rtred1test09.kymeta.local> (raw)
In-Reply-To: <1447880807.4553.171.camel@rtred1test09.kymeta.local>

The Synopsys DesignWare core supports 52 MHz MMC mode and 50 MHz SD
mode, so add the cap flags so they are used.

This works on socfpga.  The other user of this driver is Rockchip and
the datasheet I found for the RK30xx indicated it supported highspeed
modes as well.

The Linux kernel has DT properties, e.g. "cap-mmc-highspeed", but none
of the drivers in barebox support this at all.  They all specify flags
in their code.

Signed-off-by: Trent Piepho <tpiepho@kymetacorp.com>
---
 drivers/mci/dw_mmc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/mci/dw_mmc.c b/drivers/mci/dw_mmc.c
index 18ddd16..cbd3f00 100644
--- a/drivers/mci/dw_mmc.c
+++ b/drivers/mci/dw_mmc.c
@@ -706,6 +706,8 @@ static int dw_mmc_probe(struct device_d *dev)
 	host->mci.hw_dev = dev;
 	host->mci.voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
 	host->mci.host_caps = MMC_CAP_4_BIT_DATA | MMC_CAP_8_BIT_DATA;
+	host->mci.host_caps |= MMC_CAP_MMC_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED_52MHZ |
+			       MMC_CAP_SD_HIGHSPEED;
 
 	if (pdata) {
 		host->ciu_div = pdata->ciu_div;
-- 
1.8.3.1


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  parent reply	other threads:[~2015-11-18 21:14 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-18 21:06 [PATCH 1/4] mci: core: bus-width property should override driver default Trent Piepho
2015-11-18 21:11 ` [PATCH 2/4] mci: dw_mmc: socfpga: Supply bus-width in platform_data Trent Piepho
2015-11-18 21:12 ` [PATCH 3/4] mci: dw_mmc: Delete devname " Trent Piepho
2015-11-18 21:14 ` Trent Piepho [this message]
2015-11-19  7:52 ` [PATCH 1/4] mci: core: bus-width property should override driver default Sascha Hauer

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