From: Suman Tripathi <stripathi@apm.com>
Date: Mon, 4 May 2015 13:39:51 +0000 (+0530)
Subject: mmc: sdhci-of-arasan: Add the support for sdhci-arasan4.9a
X-Git-Tag: firefly_0821_release~176^2~1614^2~75
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=308f3f8d8112ea9af6e10564f4012f2d1f94f062;p=firefly-linux-kernel-4.4.55.git

mmc: sdhci-of-arasan: Add the support for sdhci-arasan4.9a

This patch adds the quirks and compatible string in sdhci-of-arasan.c
to support sdhci-arasan4.9a version of controller.

Signed-off-by: Suman Tripathi <stripathi@apm.com>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
---

diff --git a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
index 98ee2abbe138..7e9490313d5a 100644
--- a/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
+++ b/Documentation/devicetree/bindings/mmc/arasan,sdhci.txt
@@ -8,7 +8,8 @@ Device Tree Bindings for the Arasan SDHCI Controller
   [3] Documentation/devicetree/bindings/interrupt-controller/interrupts.txt
 
 Required Properties:
-  - compatible: Compatibility string. Must be 'arasan,sdhci-8.9a'
+  - compatible: Compatibility string. Must be 'arasan,sdhci-8.9a' or
+                'arasan,sdhci-4.9a'
   - reg: From mmc bindings: Register location and length.
   - clocks: From clock bindings: Handles to clock inputs.
   - clock-names: From clock bindings: Tuple including "clk_xin" and "clk_ahb"
diff --git a/drivers/mmc/host/sdhci-of-arasan.c b/drivers/mmc/host/sdhci-of-arasan.c
index 6287d426c96b..21c0c08dfe54 100644
--- a/drivers/mmc/host/sdhci-of-arasan.c
+++ b/drivers/mmc/host/sdhci-of-arasan.c
@@ -20,6 +20,7 @@
  */
 
 #include <linux/module.h>
+#include <linux/of_device.h>
 #include "sdhci-pltfm.h"
 
 #define SDHCI_ARASAN_CLK_CTRL_OFFSET	0x2c
@@ -168,6 +169,11 @@ static int sdhci_arasan_probe(struct platform_device *pdev)
 		goto clk_disable_all;
 	}
 
+	if (of_device_is_compatible(pdev->dev.of_node, "arasan,sdhci-4.9a")) {
+		host->quirks |= SDHCI_QUIRK_NO_HISPD_BIT;
+		host->quirks2 |= SDHCI_QUIRK2_HOST_NO_CMD23;
+	}
+
 	sdhci_get_of_property(pdev);
 	pltfm_host = sdhci_priv(host);
 	pltfm_host->priv = sdhci_arasan;
@@ -208,6 +214,7 @@ static int sdhci_arasan_remove(struct platform_device *pdev)
 
 static const struct of_device_id sdhci_arasan_of_match[] = {
 	{ .compatible = "arasan,sdhci-8.9a" },
+	{ .compatible = "arasan,sdhci-4.9a" },
 	{ }
 };
 MODULE_DEVICE_TABLE(of, sdhci_arasan_of_match);