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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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