linux-kernel - [PATCH] mmc: Enable bus-width tests on SDHCI host

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Date:	Wed, 15 Dec 2010 14:17:27 +0100
From:	Takashi Iwai <tiwai@...e.de>
To:	Chris Ball <cjb@...top.org>
Cc:	Philip Rakity <prakity@...vell.com>,
	Aries Lee <arieslee@...cron.com>,
	zhangfei gao <zhangfei.gao@...il.com>, wuqm@...vell.com,
	linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] mmc: Enable bus-width tests on SDHCI host

Let's enable the new bus-width tests on SDHCI hosts unless 1-bit data
is set forcibly.

Signed-off-by: Takashi Iwai <tiwai@...e.de>
---

This is a patch to be applied after
  "mmc: Test bus-width for old MMC devices (v2)"


 drivers/mmc/host/sdhci.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)

diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index 0502738..51f5209 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1888,8 +1888,10 @@ int sdhci_add_host(struct sdhci_host *host)
 	 * their platform code before calling sdhci_add_host(), and we
 	 * won't assume 8-bit width for hosts without that CAP.
 	 */
-	if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA))
+	if (!(host->quirks & SDHCI_QUIRK_FORCE_1_BIT_DATA)) {
 		mmc->caps |= MMC_CAP_4_BIT_DATA;
+		mmc->caps |= MMC_CAP_BUS_WIDTH_TEST;
+	}
 
 	if (caps & SDHCI_CAN_DO_HISPD)
 		mmc->caps |= MMC_CAP_SD_HIGHSPEED | MMC_CAP_MMC_HIGHSPEED;
-- 
1.7.3.1

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