linux-kernel - [PATCH] regmap: add regmap_update

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Message-Id: <20231106163406.33952-1-fusibrandon13@gmail.com>
Date:   Mon,  6 Nov 2023 17:34:06 +0100
From:   Brandon Cheo Fusi <fusibrandon13@...il.com>
To:     Mark Brown <broonie@...nel.org>
Cc:     linux-kernel@...r.kernel.org,
        Brandon Cheo Fusi <fusibrandon13@...il.com>
Subject: [PATCH] regmap: add regmap_update_bits variant to autoshift mask

This is both trivial and very handy in cases where the mask contains a single
contiguous group (GENMASK(hi, lo)), so users don't have to always adjust val.

Signed-off-by: Brandon Cheo Fusi <fusibrandon13@...il.com>
---
 include/linux/regmap.h | 69 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index c9182a477..373f00f30 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1241,12 +1241,28 @@ static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
 	return regmap_update_bits_base(map, reg, mask, val, NULL, false, false);
 }
 
+static inline int regmap_update_bits_autoshift_val(struct regmap *map, unsigned int reg,
+				     unsigned int mask, unsigned int val)
+{
+	val <<= (ffs(mask) - 1);
+
+	return regmap_update_bits_base(map, reg, mask, val, NULL, false, false);
+}
+
 static inline int regmap_update_bits_async(struct regmap *map, unsigned int reg,
 					   unsigned int mask, unsigned int val)
 {
 	return regmap_update_bits_base(map, reg, mask, val, NULL, true, false);
 }
 
+static inline int regmap_update_bits_autoshift_val_async(struct regmap *map,
+					   unsigned int reg, unsigned int mask, unsigned int val)
+{
+	val <<= (ffs(mask) - 1);
+
+	return regmap_update_bits_base(map, reg, mask, val, NULL, true, false);
+}
+
 static inline int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 					   unsigned int mask, unsigned int val,
 					   bool *change)
@@ -1255,6 +1271,16 @@ static inline int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 				       change, false, false);
 }
 
+static inline int regmap_update_bits_autoshift_val_check(struct regmap *map,
+					   unsigned int reg, unsigned int mask, unsigned int val,
+					   bool *change)
+{
+	val <<= (ffs(mask) - 1);
+
+	return regmap_update_bits_base(map, reg, mask, val,
+				       change, false, false);
+}
+
 static inline int
 regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 			       unsigned int mask, unsigned int val,
@@ -1264,6 +1290,17 @@ regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 				       change, true, false);
 }
 
+static inline int
+regmap_update_bits_autoshift_val_check_async(struct regmap *map,
+				   unsigned int reg, unsigned int mask, unsigned int val,
+			       bool *change)
+{
+	val <<= (ffs(mask) - 1);
+
+	return regmap_update_bits_base(map, reg, mask, val,
+				       change, true, false);
+}
+
 static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
 				    unsigned int mask, unsigned int val)
 {
@@ -1808,6 +1845,13 @@ static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
+static inline int regmap_update_bits_autoshift_val(struct regmap *map,
+					 unsigned int reg, unsigned int mask, unsigned int val)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int regmap_update_bits_async(struct regmap *map, unsigned int reg,
 					   unsigned int mask, unsigned int val)
 {
@@ -1815,6 +1859,14 @@ static inline int regmap_update_bits_async(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
+static inline int regmap_update_bits_autoshift_val_async(struct regmap *map,
+					   unsigned int reg, unsigned int mask, unsigned int val)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
+
 static inline int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 					   unsigned int mask, unsigned int val,
 					   bool *change)
@@ -1823,6 +1875,14 @@ static inline int regmap_update_bits_check(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
+static inline int regmap_update_bits_autoshift_val_check(struct regmap *map,
+					   unsigned int reg, unsigned int mask, unsigned int val,
+					   bool *change)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int
 regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 			       unsigned int mask, unsigned int val,
@@ -1832,6 +1892,15 @@ regmap_update_bits_check_async(struct regmap *map, unsigned int reg,
 	return -EINVAL;
 }
 
+static inline int
+regmap_update_bits_autoshift_val_check_async(struct regmap *map,
+				   unsigned int reg, unsigned int mask, unsigned int val,
+			       bool *change)
+{
+	WARN_ONCE(1, "regmap API is disabled");
+	return -EINVAL;
+}
+
 static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
 				    unsigned int mask, unsigned int val)
 {
-- 
2.30.2