linux-kernel - RE: [PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0 controller

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Message-id: <077f01cdfeaf$4f7b8780$ee729680$@samsung.com>
Date:	Tue, 29 Jan 2013 22:01:52 -0800
From:	Kukjin Kim <kgene.kim@...sung.com>
To:	'Vivek Gautam' <gautam.vivek@...sung.com>,
	linux-usb@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, devicetree-discuss@...ts.ozlabs.org,
	linux-samsung-soc@...r.kernel.org, gregkh@...uxfoundation.org,
	balbi@...com, grant.likely@...retlab.ca,
	sylvester.nawrocki@...il.com, tomasz.figa@...il.com,
	av.tikhomirov@...sung.com, dianders@...omium.org,
	p.paneri@...sung.com
Subject: RE: [PATCH v4 2/2] usb: phy: samsung: Add PHY support for USB 3.0
 controller

Vivek Gautam wrote:
> 
> Adding PHY driver support for USB 3.0 controller for Samsung's
> SoCs.
> 
> Signed-off-by: Vivek Gautam <gautam.vivek@...sung.com>
> ---
> 
> Changes from v3:
>  - Making SAMSUNG_USB3PHY dependent on SAMSUNG_USBPHY.
>  - Adding USB_DWC3 to dependencies of SAMSUNG_USB2PHY since
>    dwc3 controller also looks for USB2 type PHY.
> 
>  drivers/usb/phy/Kconfig          |   11 +-
>  drivers/usb/phy/Makefile         |    1 +
>  drivers/usb/phy/samsung-usb3.c   |  349
> ++++++++++++++++++++++++++++++++++++++
>  drivers/usb/phy/samsung-usbphy.h |   81 +++++++++
>  4 files changed, 441 insertions(+), 1 deletions(-)
>  create mode 100644 drivers/usb/phy/samsung-usb3.c
> 
> diff --git a/drivers/usb/phy/Kconfig b/drivers/usb/phy/Kconfig
> index cc0d230..9325a95 100644
> --- a/drivers/usb/phy/Kconfig
> +++ b/drivers/usb/phy/Kconfig
> @@ -52,14 +52,23 @@ config SAMSUNG_USBPHY
>  	help
>  	  Enable this to support Samsung USB phy controllers for Samsung
>  	  SoCs.
> +	  Further enable USB 2.0 type PHY or USB 3.0 type PHY as required
> +	  for USB controllers in use.
> 
>  if SAMSUNG_USBPHY
> 
>  config SAMSUNG_USB2PHY
>  	bool "Samsung USB 2.0 PHY controller Driver"
> -	depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
> USB_OHCI_EXYNOS
> +	depends on USB_S3C_HSOTG || USB_EHCI_S5P ||
> USB_OHCI_EXYNOS || USB_DWC3
>  	help
>  	  Enable this to support Samsung USB 2.0 (High Speed) phy controller
>  	  for Samsung SoCs.
> 
> +config SAMSUNG_USB3PHY
> +	bool "Samsung USB 3.0 PHY controller Driver"
> +	depends on USB_DWC3
> +	help
> +	  Enable this to support Samsung USB 3.0 (Super Speed) phy
> controller
> +	  for samsung SoCs.
> +
>  endif

It mean, when USB_DWC3 is selected, we can select only one USB2PHY or
USB3PHY?

[...]

> +#ifdef CONFIG_OF
> +static const struct of_device_id samsung_usbphy_dt_match[] = {
> +	{
> +		.compatible = "samsung,exynos5250-usb3-phy",
> +		.data = &usb3_phy_exynos5
> +	},
> +	{},
> +};
> +MODULE_DEVICE_TABLE(of, samsung_usbphy_dt_match);
> +#endif
> +
> +static struct platform_device_id samsung_usbphy_driver_ids[] = {
> +	{
> +		.name		= "exynos5250-usb3-phy",

According to the name of file, exynos5250-usb3phy? Just it is imho...

> +		.driver_data	= (unsigned long)&usb3_phy_exynos5,
> +	},
> +	{},
> +};
> +
> +MODULE_DEVICE_TABLE(platform, samsung_usbphy_driver_ids);
> +
> +static struct platform_driver samsung_usb3_phy_driver = {
> +	.probe		= samsung_usb3_phy_probe,
> +	.remove		= samsung_usb3_phy_remove,
> +	.id_table	= samsung_usbphy_driver_ids,
> +	.driver		= {
> +		.name	= "samsung-usb3-phy",
> +		.owner	= THIS_MODULE,
> +		.of_match_table =
> of_match_ptr(samsung_usbphy_dt_match),
> +	},
> +};
> +
> +module_platform_driver(samsung_usb3_phy_driver);
> +
> +MODULE_DESCRIPTION("Samsung USB 3.0 phy controller");
> +MODULE_AUTHOR("Vivek Gautam <gautam.vivek@...sung.com>");
> +MODULE_LICENSE("GPL");
> +MODULE_ALIAS("platform:samsung-usb3-phy");

I want you to use same naming rule.

Thanks.

- Kukjin

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