[PATCH 2/3 v2] USB: ehci-s5p: Add support for device tree

[Vivek Gautam <gautam.vivek@samsung.com>]

This patch adds support to parse probe data for
ehci driver for exynos using device tree

Signed-off-by: Thomas Abraham <thomas.abraham@linaro.org>
Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>

diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index c474cec..52d0049 100644
--- a/drivers/usb/host/ehci-s5p.c
+++ b/drivers/usb/host/ehci-s5p.c
@@ -13,6 +13,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <plat/ehci.h>
 #include <plat/usb-phy.h>
@@ -63,6 +64,8 @@ static const struct hc_driver s5p_ehci_hc_driver = {
 	.clear_tt_buffer_complete	= ehci_clear_tt_buffer_complete,
 };
 
+static u64 ehci_s5p_dma_mask = DMA_BIT_MASK(32);
+
 static int __devinit s5p_ehci_probe(struct platform_device *pdev)
 {
 	struct s5p_ehci_platdata *pdata;
@@ -79,6 +82,16 @@ static int __devinit s5p_ehci_probe(struct platform_device *pdev)
 		return -EINVAL;
 	}
 
+	/*
+	 * Right now device-tree probed devices don't get dma_mask set.
+	 * Since shared usb code relies on it, set it here for now.
+	 * Once we move to full device tree support this will vanish off.
+	 */
+	if (!pdev->dev.dma_mask)
+		pdev->dev.dma_mask = &ehci_s5p_dma_mask;
+	if (!pdev->dev.coherent_dma_mask)
+		pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
 	s5p_ehci = kzalloc(sizeof(struct s5p_ehci_hcd), GFP_KERNEL);
 	if (!s5p_ehci)
 		return -ENOMEM;
@@ -298,6 +311,14 @@ static int s5p_ehci_resume(struct device *dev)
 #define s5p_ehci_resume		NULL
 #endif
 
+#ifdef CONFIG_OF
+static const struct of_device_id exynos_ehci_match[] = {
+	{ .compatible = "samsung,exynos-ehci" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, exynos_ehci_match);
+#endif
+
 static const struct dev_pm_ops s5p_ehci_pm_ops = {
 	.suspend	= s5p_ehci_suspend,
 	.resume		= s5p_ehci_resume,
@@ -311,6 +332,7 @@ static struct platform_driver s5p_ehci_driver = {
 		.name	= "s5p-ehci",
 		.owner	= THIS_MODULE,
 		.pm	= &s5p_ehci_pm_ops,
+		.of_match_table = of_match_ptr(exynos_ehci_match),
 	}
 };
 
-- 
1.7.0.4