linux-kernel - Re: [PATCH 1/3 v3] USB: ohci-exynos: Add support for device tree

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Message-id: <002701cd631d$9372fb40$ba58f1c0$%han@samsung.com>
Date:	Mon, 16 Jul 2012 15:38:13 +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 1/3 v3] USB: ohci-exynos: 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
> ohci 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/ohci-exynos.c b/drivers/usb/host/ohci-exynos.c
> index 8bcbdb5..fc3091b 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),
>  	}
>  };
> 
> --
> 1.7.0.4

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