linux-kernel - Re: [PATCH v2 1/2] extcon: ptn5150: Switch to GENMASK() and BIT() macros

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Message-ID: <8f26c8cb-3f6b-5933-a0f8-eb765ad5016a@samsung.com>
Date:   Thu, 27 Aug 2020 14:26:12 +0900
From:   Chanwoo Choi <cw00.choi@...sung.com>
To:     "Ramuthevar,Vadivel MuruganX" 
        <vadivel.muruganx.ramuthevar@...ux.intel.com>,
        linux-kernel@...r.kernel.org
Cc:     vijaikumar.kanagarajan@...il.com, krzk@...nel.org,
        myungjoo.ham@...sung.com, heikki.krogerus@...ux.intel.com,
        cheol.yong.kim@...el.com, qi-ming.wu@...el.com, yin1.li@...el.com
Subject: Re: [PATCH v2 1/2] extcon: ptn5150: Switch to GENMASK() and BIT()
 macros

On 8/27/20 12:56 PM, Ramuthevar,Vadivel MuruganX wrote:
> From: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
> 
> Switch to GENMASK() and BIT() macros.
> 
> Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@...ux.intel.com>
> Reviewed-by: Krzysztof Kozlowski <krzk@...nel.org>
> ---
>  drivers/extcon/extcon-ptn5150.c | 43 +++++++++++------------------------------
>  1 file changed, 11 insertions(+), 32 deletions(-)
> 
> diff --git a/drivers/extcon/extcon-ptn5150.c b/drivers/extcon/extcon-ptn5150.c
> index 8ba706fad887..8b930050a3f1 100644
> --- a/drivers/extcon/extcon-ptn5150.c
> +++ b/drivers/extcon/extcon-ptn5150.c
> @@ -7,6 +7,7 @@
>  // Author: Vijai Kumar K <vijaikumar.kanagarajan@...il.com>
>  // Copyright (c) 2020 Krzysztof Kozlowski <krzk@...nel.org>
>  
> +#include <linux/bitfield.h>
>  #include <linux/err.h>
>  #include <linux/i2c.h>
>  #include <linux/interrupt.h>
> @@ -35,29 +36,13 @@ enum ptn5150_reg {
>  #define PTN5150_UFP_ATTACHED			0x2
>  
>  /* Define PTN5150 MASK/SHIFT constant */
> -#define PTN5150_REG_DEVICE_ID_VENDOR_SHIFT	0
> -#define PTN5150_REG_DEVICE_ID_VENDOR_MASK	\
> -	(0x3 << PTN5150_REG_DEVICE_ID_VENDOR_SHIFT)
> +#define PTN5150_REG_DEVICE_ID_VERSION		GENMASK(7, 3)
> +#define PTN5150_REG_DEVICE_ID_VENDOR		GENMASK(2, 0)
>  
> -#define PTN5150_REG_DEVICE_ID_VERSION_SHIFT	3
> -#define PTN5150_REG_DEVICE_ID_VERSION_MASK	\
> -	(0x1f << PTN5150_REG_DEVICE_ID_VERSION_SHIFT)
> -
> -#define PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT	2
> -#define PTN5150_REG_CC_PORT_ATTACHMENT_MASK	\
> -	(0x7 << PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT)
> -
> -#define PTN5150_REG_CC_VBUS_DETECTION_SHIFT	7
> -#define PTN5150_REG_CC_VBUS_DETECTION_MASK	\
> -	(0x1 << PTN5150_REG_CC_VBUS_DETECTION_SHIFT)
> -
> -#define PTN5150_REG_INT_CABLE_ATTACH_SHIFT	0
> -#define PTN5150_REG_INT_CABLE_ATTACH_MASK	\
> -	(0x1 << PTN5150_REG_INT_CABLE_ATTACH_SHIFT)
> -
> -#define PTN5150_REG_INT_CABLE_DETACH_SHIFT	1
> -#define PTN5150_REG_INT_CABLE_DETACH_MASK	\
> -	(0x1 << PTN5150_REG_CC_CABLE_DETACH_SHIFT)
> +#define PTN5150_REG_CC_PORT_ATTACHMENT		GENMASK(4, 2)
> +#define PTN5150_REG_CC_VBUS_DETECTION		BIT(7)
> +#define PTN5150_REG_INT_CABLE_ATTACH_MASK	BIT(0)
> +#define PTN5150_REG_INT_CABLE_DETACH_MASK	BIT(1)
>  
>  struct ptn5150_info {
>  	struct device *dev;
> @@ -95,9 +80,7 @@ static void ptn5150_check_state(struct ptn5150_info *info)
>  		return;
>  	}
>  
> -	port_status = ((reg_data &
> -			PTN5150_REG_CC_PORT_ATTACHMENT_MASK) >>
> -			PTN5150_REG_CC_PORT_ATTACHMENT_SHIFT);
> +	port_status = FIELD_GET(PTN5150_REG_CC_PORT_ATTACHMENT, reg_data);
>  
>  	switch (port_status) {
>  	case PTN5150_DFP_ATTACHED:
> @@ -107,8 +90,7 @@ static void ptn5150_check_state(struct ptn5150_info *info)
>  		break;
>  	case PTN5150_UFP_ATTACHED:
>  		extcon_set_state_sync(info->edev, EXTCON_USB, false);
> -		vbus = ((reg_data & PTN5150_REG_CC_VBUS_DETECTION_MASK) >>
> -			PTN5150_REG_CC_VBUS_DETECTION_SHIFT);
> +		vbus = FIELD_GET(PTN5150_REG_CC_VBUS_DETECTION, reg_data);
>  		if (vbus)
>  			gpiod_set_value_cansleep(info->vbus_gpiod, 0);
>  		else
> @@ -191,11 +173,8 @@ static int ptn5150_init_dev_type(struct ptn5150_info *info)
>  		return -EINVAL;
>  	}
>  
> -	vendor_id = ((reg_data & PTN5150_REG_DEVICE_ID_VENDOR_MASK) >>
> -				PTN5150_REG_DEVICE_ID_VENDOR_SHIFT);
> -	version_id = ((reg_data & PTN5150_REG_DEVICE_ID_VERSION_MASK) >>
> -				PTN5150_REG_DEVICE_ID_VERSION_SHIFT);
> -
> +	vendor_id = FIELD_GET(PTN5150_REG_DEVICE_ID_VENDOR, reg_data);
> +	version_id = FIELD_GET(PTN5150_REG_DEVICE_ID_VERSION, reg_data);
>  	dev_dbg(info->dev, "Device type: version: 0x%x, vendor: 0x%x\n",
>  		version_id, vendor_id);
>  
> 

Applied it. Thanks.

-- 
Best Regards,
Chanwoo Choi
Samsung Electronics