linux-kernel - Re: [PATCH 2/3 v3] USB: ehci-s5p: Add support for device tree

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Date:	Mon, 16 Jul 2012 15:39:32 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Vivek Gautam' <gautam.vivek@...sung.com>,
	stern@...land.harvard.edu, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org
Cc:	l.majewski@...sung.com, a.kesavan@...sung.com,
	prashanth.g@...sung.com, kmpark@...radead.org, joshi@...sung.com,
	olofj@...gle.com, jy0922.shim@...sung.com,
	thomas.abraham@...aro.org, sshtylyov@...sta.com,
	'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: [PATCH 2/3 v3] USB: ehci-s5p: Add support for device tree

On Monday, July 16, 2012 2:56 PM, Vivek Gautam wrote:
> 
> This patch adds support to parse probe data for
> ehci driver for exynos using device tree
> 
> Signed-off-by: Thomas Abraham <thomas.abraham@...aro.org>
> Signed-off-by: Abhilash Kesavan <a.kesavan@...sung.com>
> Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>

Acked-by: Jingoo Han <jg1.han@...sung.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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