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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>
This commit is contained in:
Vivek Gautam 2012-07-16 11:25:37 +05:30 committed by Greg Kroah-Hartman
parent d51389306f
commit 2c026e2b36
1 changed files with 22 additions and 0 deletions
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22
drivers/usb/host/ehci-s5p.c
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@ -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),
}
};