linux-kernel - [PATCH] mmc: mxs-mmc: Add support for non-removable cards

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Message-Id: <1365135518-31549-1-git-send-email-aletes.xgr@gmail.com>
Date:	Fri,  5 Apr 2013 01:18:38 -0300
From:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
To:	cjb@...top.org, shawn.guo@...aro.org, marex@...x.de,
	fabio.estevam@...escale.com, otavio@...ystems.com.br,
	broonie@...nsource.wolfsonmicro.com, linux-mmc@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc:	Alexandre Pereira da Silva <aletes.xgr@...il.com>
Subject: [PATCH] mmc: mxs-mmc: Add support for non-removable cards

Some boards and card slots doesn't have card detect feature available.
In that case allow to mark the cards as non-removable, via devicetree.

Signed-off-by: Alexandre Pereira da Silva <aletes.xgr@...il.com>
---
 drivers/mmc/host/mxs-mmc.c |    6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mmc/host/mxs-mmc.c b/drivers/mmc/host/mxs-mmc.c
index 4efe302..7d2cd74 100644
--- a/drivers/mmc/host/mxs-mmc.c
+++ b/drivers/mmc/host/mxs-mmc.c
@@ -95,6 +95,9 @@ static int mxs_mmc_get_cd(struct mmc_host *mmc)
 	struct mxs_mmc_host *host = mmc_priv(mmc);
 	struct mxs_ssp *ssp = &host->ssp;
 
+	if (mmc->caps & MMC_CAP_NONREMOVABLE)
+		return 1;
+
 	return !(readl(ssp->base + HW_SSP_STATUS(ssp)) &
 		 BM_SSP_STATUS_CARD_DETECT);
 }
@@ -691,6 +694,9 @@ static int mxs_mmc_probe(struct platform_device *pdev)
 	if (flags & OF_GPIO_ACTIVE_LOW)
 		host->wp_inverted = 1;
 
+	if (of_find_property(np, "non-removable", NULL))
+		mmc->caps |= MMC_CAP_NONREMOVABLE;
+
 	mmc->f_min = 400000;
 	mmc->f_max = 288000000;
 	mmc->ocr_avail = MMC_VDD_32_33 | MMC_VDD_33_34;
-- 
1.7.10

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