linux-kernel - [PATCH] Add SDR12 & SDR25 support for sdio cards.

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Date:	Tue, 22 Jul 2014 10:52:51 +0000
From:	"Yuan, JuntaoX" <juntaox.yuan@...el.com>
To:	"chris@...ntf.net" <chris@...ntf.net>
CC:	"ulf.hansson@...aro.org" <ulf.hansson@...aro.org>,
	"Yuan, JuntaoX" <juntaox.yuan@...el.com>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Dong, Chuanxiao" <chuanxiao.dong@...el.com>
Subject: [PATCH] Add SDR12 & SDR25 support for sdio cards.

>From c8a190816725dd6586bc9de997bf8e50416da428 Mon Sep 17 00:00:00 2001
From: Yuan Juntao <juntaox.yuan@...el.com>
Date: Tue, 22 Jul 2014 18:16:34 +0800
Subject: [PATCH] Add SDR12 & SDR25 support for sdio cards.

According to SDIO simplified specification v3.0, a card should also
support SDR25 & SDR12 if one of the DDR50, SDR50, and SDR104 modes
is supported.

Signed-off-by: Yuan Juntao <juntaox.yuan@...el.com>
---
 drivers/mmc/core/sdio.c |   14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/mmc/core/sdio.c b/drivers/mmc/core/sdio.c
index 4d721c6..6a8ce6f 100644
--- a/drivers/mmc/core/sdio.c
+++ b/drivers/mmc/core/sdio.c
@@ -160,15 +160,23 @@ static int sdio_read_cccr(struct mmc_card *card, u32 ocr)
 			if (mmc_host_uhs(card->host)) {
 				if (data & SDIO_UHS_DDR50)
 					card->sw_caps.sd3_bus_mode
-						|= SD_MODE_UHS_DDR50;
+						|= SD_MODE_UHS_DDR50 |
+						   SD_MODE_UHS_SDR50 |
+						   SD_MODE_UHS_SDR25 |
+						   SD_MODE_UHS_SDR12;
 
 				if (data & SDIO_UHS_SDR50)
 					card->sw_caps.sd3_bus_mode
-						|= SD_MODE_UHS_SDR50;
+						|= SD_MODE_UHS_SDR50 |
+						   SD_MODE_UHS_SDR25 |
+						   SD_MODE_UHS_SDR12;
 
 				if (data & SDIO_UHS_SDR104)
 					card->sw_caps.sd3_bus_mode
-						|= SD_MODE_UHS_SDR104;
+						|= SD_MODE_UHS_SDR104 |
+						   SD_MODE_UHS_SDR50 |
+						   SD_MODE_UHS_SDR25 |
+						   SD_MODE_UHS_SDR12;
 			}
 
 			ret = mmc_io_rw_direct(card, 0, 0,
-- 
1.7.9.5

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