linux-kernel - [PATCH] usb: typec: pd: no opencoding of FIELD

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Message-ID: <20240229131851.16148-2-oneukum@suse.com>
Date: Thu, 29 Feb 2024 14:17:33 +0100
From: Oliver Neukum <oneukum@...e.com>
To: gregkh@...uxfoundation.org,
	linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Oliver Neukum <oneukum@...e.com>
Subject: [PATCH] usb: typec: pd: no opencoding of FIELD_GET

If we have a neat macro, at least new code should
use it.

Signed-off-by: Oliver Neukum <oneukum@...e.com>
---
 include/linux/usb/pd_vdo.h   |  5 +++--
 include/linux/usb/typec_dp.h | 11 ++++++-----
 2 files changed, 9 insertions(+), 7 deletions(-)

diff --git a/include/linux/usb/pd_vdo.h b/include/linux/usb/pd_vdo.h
index c09c5a12e273..5c48e8a81403 100644
--- a/include/linux/usb/pd_vdo.h
+++ b/include/linux/usb/pd_vdo.h
@@ -7,6 +7,7 @@
 #define __LINUX_USB_PD_VDO_H
 
 #include "pd.h"
+#include <linux/bitfield.h>
 
 /*
  * VDO : Vendor Defined Message Object
@@ -188,7 +189,7 @@
  * <5:3>   :: Alternate modes
  * <2:0>   :: USB highest speed
  */
-#define PD_VDO_UFP_DEVCAP(vdo)	(((vdo) & GENMASK(27, 24)) >> 24)
+#define PD_VDO_UFP_DEVCAP(vdo)	FIELD_GET(GENMASK(27, 24), vdo)
 
 /* UFP VDO Version */
 #define UFP_VDO_VER1_2		2
@@ -247,7 +248,7 @@
  * <21:5>  :: Reserved
  * <4:0>   :: Port number
  */
-#define PD_VDO_DFP_HOSTCAP(vdo)	(((vdo) & GENMASK(26, 24)) >> 24)
+#define PD_VDO_DFP_HOSTCAP(vdo)	FIELD_GET(GENMASK(26, 24), vdo)
 
 #define DFP_VDO_VER1_1		1
 #define HOST_USB2_CAPABLE	BIT(0)
diff --git a/include/linux/usb/typec_dp.h b/include/linux/usb/typec_dp.h
index 1f358098522d..f2da264d9c14 100644
--- a/include/linux/usb/typec_dp.h
+++ b/include/linux/usb/typec_dp.h
@@ -3,6 +3,7 @@
 #define __USB_TYPEC_DP_H
 
 #include <linux/usb/typec_altmode.h>
+#include <linux/bitfield.h>
 
 #define USB_TYPEC_DP_SID	0xff01
 /* USB IF has not assigned a Standard ID (SID) for VirtualLink,
@@ -67,21 +68,21 @@ enum {
 #define   DP_CAP_UFP_D			1
 #define   DP_CAP_DFP_D			2
 #define   DP_CAP_DFP_D_AND_UFP_D	3
-#define DP_CAP_DP_SIGNALLING(_cap_)	(((_cap_) & GENMASK(5, 2)) >> 2)
+#define DP_CAP_DP_SIGNALLING(_cap_)	FIELD_GET(GENMASK(5, 2), _cap_)
 #define   DP_CAP_SIGNALLING_HBR3	1
 #define   DP_CAP_SIGNALLING_UHBR10	2
 #define   DP_CAP_SIGNALLING_UHBR20	3
 #define DP_CAP_RECEPTACLE		BIT(6)
 #define DP_CAP_USB			BIT(7)
-#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_)	(((_cap_) & GENMASK(15, 8)) >> 8)
-#define DP_CAP_UFP_D_PIN_ASSIGN(_cap_)	(((_cap_) & GENMASK(23, 16)) >> 16)
+#define DP_CAP_DFP_D_PIN_ASSIGN(_cap_)	FIELD_GET(GENMASK(15, 8), _cap_)
+#define DP_CAP_UFP_D_PIN_ASSIGN(_cap_)	FIELD_GET(GENMASK(23, 16), _cap_)
 /* Get pin assignment taking plug & receptacle into consideration */
 #define DP_CAP_PIN_ASSIGN_UFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
 			DP_CAP_UFP_D_PIN_ASSIGN(_cap_) : DP_CAP_DFP_D_PIN_ASSIGN(_cap_))
 #define DP_CAP_PIN_ASSIGN_DFP_D(_cap_) ((_cap_ & DP_CAP_RECEPTACLE) ? \
 			DP_CAP_DFP_D_PIN_ASSIGN(_cap_) : DP_CAP_UFP_D_PIN_ASSIGN(_cap_))
 #define DP_CAP_UHBR_13_5_SUPPORT	BIT(26)
-#define DP_CAP_CABLE_TYPE(_cap_)	(((_cap_) & GENMASK(29, 28)) >> 28)
+#define DP_CAP_CABLE_TYPE(_cap_)	FIELD_GET(GENMASK(29, 28), _cap_)
 #define   DP_CAP_CABLE_TYPE_PASSIVE	0
 #define   DP_CAP_CABLE_TYPE_RE_TIMER	1
 #define   DP_CAP_CABLE_TYPE_RE_DRIVER	2
@@ -116,7 +117,7 @@ enum {
 
 /* Helper for setting/getting the pin assignment value to the configuration */
 #define DP_CONF_SET_PIN_ASSIGN(_a_)	((_a_) << 8)
-#define DP_CONF_GET_PIN_ASSIGN(_conf_)	(((_conf_) & GENMASK(15, 8)) >> 8)
+#define DP_CONF_GET_PIN_ASSIGN(_conf_)	FIELD_GET(GENMASK(15, 8), _conf_)
 #define DP_CONF_UHBR13_5_SUPPORT	BIT(26)
 #define DP_CONF_CABLE_TYPE_MASK		GENMASK(29, 28)
 #define DP_CONF_CABLE_TYPE_SHIFT	28
-- 
2.43.2