linux-kernel - [PATCH 3/3] MMC: FSL SDHC: Add support for hard-wired (permanent) card. Kernel version 3.4.47

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Message-ID: <1370155128-680-1-git-send-email-ogabbay@advaoptical.com>
Date:	Sun, 2 Jun 2013 09:38:48 +0300
From:	Oded Gabbay <ogabbay@...aoptical.com>
To:	<gregkh@...uxfoundation.org>, <cjb@...top.org>,
	<grant.likely@...retlab.ca>, <rob@...dley.net>
CC:	<linux-mmc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<devicetree-discuss@...ts.ozlabs.org>, <linux-doc@...r.kernel.org>,
	<ogabbay@...aoptical.com>
Subject: [PATCH 3/3] MMC: FSL SDHC: Add support for hard-wired (permanent) card. Kernel version 3.4.47

This patch adds support of recognizing hard-wired (permanent) cards
to Freescale's SDHC host driver. This is done by adding the option
"fsl,card-wired" to the SDHC device-tree entry. Detection of this
option is done in the probe function. Update documentation in file
fsl-esdhc.txt

Signed-off-by: Oded Gabbay <ogabbay@...aoptical.com>
---
 Documentation/devicetree/bindings/mmc/fsl-esdhc.txt | 3 +++
 drivers/mmc/host/sdhci-of-esdhc.c                   | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
index 64bcb8b..6f0eefa 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
+++ b/Documentation/devicetree/bindings/mmc/fsl-esdhc.txt
@@ -16,6 +16,9 @@ Required properties:
     only handle 1-bit data transfers.
   - sdhci,auto-cmd12: (optional) specifies that a controller can
     only handle auto CMD12.
+  - fsl,card-wired : (optional) specifies that the card is
+    a permanent card and should not be detected for insertion or
+    removal
 
 Example:
 
diff --git a/drivers/mmc/host/sdhci-of-esdhc.c b/drivers/mmc/host/sdhci-of-esdhc.c
index e70f22f..2f79ec2 100644
--- a/drivers/mmc/host/sdhci-of-esdhc.c
+++ b/drivers/mmc/host/sdhci-of-esdhc.c
@@ -222,6 +222,10 @@ static int __devinit sdhci_esdhc_probe(struct platform_device *pdev)
 		host->quirks2 |= SDHCI_QUIRK2_BROKEN_HOST_CONTROL;
 	}
 
+	/* If card is permanent, add capability of non-removable */
+	if (of_get_property(np, "fsl,card-wired", NULL))
+		host->mmc->caps |= MMC_CAP_NONREMOVABLE;
+
 	ret = sdhci_add_host(host);
 	if (ret)
 		sdhci_pltfm_free(pdev);
-- 
1.7.11.7

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