[PATCH/RFC 17/17] rtw89: Use bitfield helpers

[Geert Uytterhoeven <geert+renesas@xxxxxxxxx>]

Use the field_{get,prep}() helpers, instead of open-coding the same
operations.

Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
---
Compile-tested only.
Marked RFC, as this depends on [PATCH 01/17], but follows a different
path to upstream.
---
 drivers/net/wireless/realtek/rtw89/core.h | 38 ++++-------------------
 1 file changed, 6 insertions(+), 32 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index c2885e4dd882f045..f9c0300ec373aaf2 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -2994,81 +2994,55 @@ rtw89_write32_clr(struct rtw89_dev *rtwdev, u32 addr, u32 bit)
 static inline u32
 rtw89_read32_mask(struct rtw89_dev *rtwdev, u32 addr, u32 mask)
 {
-	u32 shift = __ffs(mask);
-	u32 orig;
-	u32 ret;
-
-	orig = rtw89_read32(rtwdev, addr);
-	ret = (orig & mask) >> shift;
-
-	return ret;
+	return field_get(mask, rtw89_read32(rtwdev, addr));
 }
 
 static inline u16
 rtw89_read16_mask(struct rtw89_dev *rtwdev, u32 addr, u32 mask)
 {
-	u32 shift = __ffs(mask);
-	u32 orig;
-	u32 ret;
-
-	orig = rtw89_read16(rtwdev, addr);
-	ret = (orig & mask) >> shift;
-
-	return ret;
+	return field_get(mask, rtw89_read16(rtwdev, addr));
 }
 
 static inline u8
 rtw89_read8_mask(struct rtw89_dev *rtwdev, u32 addr, u32 mask)
 {
-	u32 shift = __ffs(mask);
-	u32 orig;
-	u32 ret;
-
-	orig = rtw89_read8(rtwdev, addr);
-	ret = (orig & mask) >> shift;
-
-	return ret;
+	return field_get(mask, rtw89_read8(rtwdev, addr));
 }
 
 static inline void
 rtw89_write32_mask(struct rtw89_dev *rtwdev, u32 addr, u32 mask, u32 data)
 {
-	u32 shift = __ffs(mask);
 	u32 orig;
 	u32 set;
 
 	WARN(addr & 0x3, "should be 4-byte aligned, addr = 0x%08x\n", addr);
 
 	orig = rtw89_read32(rtwdev, addr);
-	set = (orig & ~mask) | ((data << shift) & mask);
+	set = (orig & ~mask) | field_prep(mask, data);
 	rtw89_write32(rtwdev, addr, set);
 }
 
 static inline void
 rtw89_write16_mask(struct rtw89_dev *rtwdev, u32 addr, u32 mask, u16 data)
 {
-	u32 shift;
 	u16 orig, set;
 
 	mask &= 0xffff;
-	shift = __ffs(mask);
 
 	orig = rtw89_read16(rtwdev, addr);
-	set = (orig & ~mask) | ((data << shift) & mask);
+	set = (orig & ~mask) | field_prep(mask, data);
 	rtw89_write16(rtwdev, addr, set);
 }
 
 static inline void
 rtw89_write8_mask(struct rtw89_dev *rtwdev, u32 addr, u32 mask, u8 data)
 {
-	u32 shift;
 	u8 orig, set;
 
 	mask &= 0xff;
-	shift = __ffs(mask);
 
 	orig = rtw89_read8(rtwdev, addr);
-	set = (orig & ~mask) | ((data << shift) & mask);
+	set = (orig & ~mask) | field_prep(mask, data);
 	rtw89_write8(rtwdev, addr, set);
 }
 
-- 
2.25.1