USB: ohci-exynos: Add support for device tree

This patch adds support to parse probe data for
ohci 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/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
index 8bcbdb5ade2d..fc3091bd2379 100644
--- a/drivers/usb/host/ohci-exynos.c
+++ b/drivers/usb/host/ohci-exynos.c
@@ -12,6 +12,7 @@
  */
 
 #include <linux/clk.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <mach/ohci.h>
 #include <plat/usb-phy.h>
@@ -71,6 +72,8 @@ static const struct hc_driver exynos_ohci_hc_driver = {
         .start_port_reset       = ohci_start_port_reset,
 };
 
+static u64 ohci_exynos_dma_mask = DMA_BIT_MASK(32);
+
 static int __devinit exynos_ohci_probe(struct platform_device *pdev)
 {
         struct exynos4_ohci_platdata *pdata;
@@ -87,6 +90,16 @@ static int __devinit exynos_ohci_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 = &ohci_exynos_dma_mask;
+        if (!pdev->dev.coherent_dma_mask)
+                pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
+
         exynos_ohci = devm_kzalloc(&pdev->dev, sizeof(struct exynos_ohci_hcd),
                                         GFP_KERNEL);
         if (!exynos_ohci)
@@ -256,6 +269,14 @@ static const struct dev_pm_ops exynos_ohci_pm_ops = {
         .resume         = exynos_ohci_resume,
 };
 
+#ifdef CONFIG_OF
+static const struct of_device_id exynos_ohci_match[] = {
+        { .compatible = "samsung,exynos-ohci" },
+        {},
+};
+MODULE_DEVICE_TABLE(of, exynos_ohci_match);
+#endif
+
 static struct platform_driver exynos_ohci_driver = {
         .probe          = exynos_ohci_probe,
         .remove         = __devexit_p(exynos_ohci_remove),
@@ -264,6 +285,7 @@ static struct platform_driver exynos_ohci_driver = {
                 .name   = "exynos-ohci",
                 .owner  = THIS_MODULE,
                 .pm     = &exynos_ohci_pm_ops,
+                .of_match_table = of_match_ptr(exynos_ohci_match),
         }
 };