USB: ehci-s5p: Add support for device tree

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>
Acked-by: Jingoo Han <jg1.han@samsung.com>
Acked-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/drivers/usb/host/ehci-s5p.c b/drivers/usb/host/ehci-s5p.c
index 13c179fb2ee2..37d84cf9a408 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 = devm_kzalloc(&pdev->dev, sizeof(struct s5p_ehci_hcd),
                                 GFP_KERNEL);
         if (!s5p_ehci)
@@ -233,6 +246,14 @@ static const struct dev_pm_ops s5p_ehci_pm_ops = {
         .resume         = s5p_ehci_resume,
 };
 
+#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 struct platform_driver s5p_ehci_driver = {
         .probe          = s5p_ehci_probe,
         .remove         = __devexit_p(s5p_ehci_remove),
@@ -241,6 +262,7 @@ 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),
         }
 };