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Subject[PATCH 2/3 v3] USB: ehci-s5p: Add support for device tree
Date
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 13c179f..37d84cf 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),
}
};

--
1.7.0.4


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