linux-kernel - RE: [PATCH 1/3][v2] drivers:usb:fsl: Replace macros with enumerated type

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Date:	Fri, 26 Jun 2015 17:12:04 +0000
From:	Badola Nikhil <nikhil.badola@...escale.com>
To:	"gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>,
	"stern@...land.harvard.edu" <stern@...land.harvard.edu>
CC:	"linux-usb@...r.kernel.org" <linux-usb@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/3][v2] drivers:usb:fsl: Replace macros with enumerated
 type

> -----Original Message-----
> From: Nikhil Badola [mailto:nikhil.badola@...escale.com]
> Sent: Monday, June 15, 2015 3:47 PM
> To: linux-usb@...r.kernel.org; linux-kernel@...r.kernel.org
> Cc: gregkh@...uxfoundation.org; stern@...land.harvard.edu; Badola Nikhil-
> B46172
> Subject: [PATCH 1/3][v2] drivers:usb:fsl: Replace macros with enumerated
> type
> 
> Replace macros with enumerated type to represent usb ip controller version
> 
> Signed-off-by: Nikhil Badola <nikhil.badola@...escale.com>
> ---
> Changes for v2 :
> 	- Assigned value to each enumerator
> 	- Changed return type of function that returns
> 	  controller version
> 	- Introduced FSL_USB_VER_NONE for invalid controller version
> 
>  drivers/usb/host/fsl-mph-dr-of.c |  8 ++++----
>  include/linux/fsl_devices.h      | 16 ++++++++++------
>  2 files changed, 14 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/usb/host/fsl-mph-dr-of.c b/drivers/usb/host/fsl-mph-dr-
> of.c
> index 5e0d600..2195956 100644
> --- a/drivers/usb/host/fsl-mph-dr-of.c
> +++ b/drivers/usb/host/fsl-mph-dr-of.c
> @@ -119,9 +119,9 @@ error:
> 
>  static const struct of_device_id fsl_usb2_mph_dr_of_match[];
> 
> -static int usb_get_ver_info(struct device_node *np)
> +static enum fsl_usb2_controller_ver usb_get_ver_info(struct device_node
> +*np)
>  {
> -	int ver = -1;
> +	enum fsl_usb2_controller_ver ver = FSL_USB_VER_NONE;
> 
>  	/*
>  	 * returns 1 for usb controller version 1.6 @@ -142,7 +142,7 @@ static
> int usb_get_ver_info(struct device_node *np)
>  		else /* for previous controller versions */
>  			ver = FSL_USB_VER_OLD;
> 
> -		if (ver > -1)
> +		if (ver > FSL_USB_VER_NONE)
>  			return ver;
>  	}
> 
> @@ -215,7 +215,7 @@ static int fsl_usb2_mph_dr_of_probe(struct
> platform_device *ofdev)
>  	pdata->controller_ver = usb_get_ver_info(np);
> 
>  	if (pdata->have_sysif_regs) {
> -		if (pdata->controller_ver < 0) {
> +		if (pdata->controller_ver == FSL_USB_VER_NONE) {
>  			dev_warn(&ofdev->dev, "Could not get controller
> version\n");
>  			return -ENODEV;
>  		}
> diff --git a/include/linux/fsl_devices.h b/include/linux/fsl_devices.h index
> 2a2f56b..0d4855cd 100644
> --- a/include/linux/fsl_devices.h
> +++ b/include/linux/fsl_devices.h
> @@ -20,11 +20,6 @@
>  #define FSL_UTMI_PHY_DLY	10	/*As per P1010RM, delay for UTMI
>  				PHY CLK to become stable - 10ms*/
>  #define FSL_USB_PHY_CLK_TIMEOUT	10000	/* uSec */
> -#define FSL_USB_VER_OLD		0
> -#define FSL_USB_VER_1_6		1
> -#define FSL_USB_VER_2_2		2
> -#define FSL_USB_VER_2_4		3
> -#define FSL_USB_VER_2_5		4
> 
>  #include <linux/types.h>
> 
> @@ -52,6 +47,15 @@
>   *
>   */
> 
> +enum fsl_usb2_controller_ver {
> +	FSL_USB_VER_NONE = -1,
> +	FSL_USB_VER_OLD = 0,
> +	FSL_USB_VER_1_6 = 1,
> +	FSL_USB_VER_2_2 = 2,
> +	FSL_USB_VER_2_4 = 3,
> +	FSL_USB_VER_2_5 = 4,
> +};
> +
>  enum fsl_usb2_operating_modes {
>  	FSL_USB2_MPH_HOST,
>  	FSL_USB2_DR_HOST,
> @@ -72,7 +76,7 @@ struct platform_device;
> 
>  struct fsl_usb2_platform_data {
>  	/* board specific information */
> -	int				controller_ver;
> +	enum fsl_usb2_controller_ver	controller_ver;
>  	enum fsl_usb2_operating_modes	operating_mode;
>  	enum fsl_usb2_phy_modes		phy_mode;
>  	unsigned int			port_enables;
> --

Hi Greg/Alan,

Could you please provide comments for this patch and the subsequent
patches in this patch set, if any.

Thanks,
Nikhil 

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