From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: [patch 037/177] sdhci: 8-bit data transfer width support Date: Tue, 10 Aug 2010 18:01:43 -0700 Message-ID: <201008110101.o7B11i0s027055@imap1.linux-foundation.org> Mime-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:58822 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757687Ab0HKBTs (ORCPT ); Tue, 10 Aug 2010 21:19:48 -0400 Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: torvalds@linux-foundation.org Cc: akpm@linux-foundation.org, kyungmin.park@samsung.com, grant.likely@secretlab.ca, linux-mmc@vger.kernel.org From: Kyungmin Park Some host controllers such as s5pc110 support the WIDE8 feature. Signed-off-by: Kyungmin Park Cc: Grant Likely Cc: Signed-off-by: Andrew Morton --- drivers/mmc/host/sdhci.c | 5 +++++ drivers/mmc/host/sdhci.h | 1 + 2 files changed, 6 insertions(+) diff -puN drivers/mmc/host/sdhci.c~sdhci-8-bit-data-transfer-width-support drivers/mmc/host/sdhci.c --- a/drivers/mmc/host/sdhci.c~sdhci-8-bit-data-transfer-width-support +++ a/drivers/mmc/host/sdhci.c @@ -1159,6 +1159,11 @@ static void sdhci_set_ios(struct mmc_hos ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL); + if (ios->bus_width == MMC_BUS_WIDTH_8) + ctrl |= SDHCI_CTRL_8BITBUS; + else + ctrl &= ~SDHCI_CTRL_8BITBUS; + if (ios->bus_width == MMC_BUS_WIDTH_4) ctrl |= SDHCI_CTRL_4BITBUS; else diff -puN drivers/mmc/host/sdhci.h~sdhci-8-bit-data-transfer-width-support drivers/mmc/host/sdhci.h --- a/drivers/mmc/host/sdhci.h~sdhci-8-bit-data-transfer-width-support +++ a/drivers/mmc/host/sdhci.h @@ -72,6 +72,7 @@ #define SDHCI_CTRL_ADMA1 0x08 #define SDHCI_CTRL_ADMA32 0x10 #define SDHCI_CTRL_ADMA64 0x18 +#define SDHCI_CTRL_8BITBUS 0x20 #define SDHCI_POWER_CONTROL 0x29 #define SDHCI_POWER_ON 0x01 _