linux-kernel - [PATCH] regmap: regmap_multi_reg_read(): make register list const

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Message-ID: <20241211133558.884669-1-rf@opensource.cirrus.com>
Date: Wed, 11 Dec 2024 13:35:58 +0000
From: Richard Fitzgerald <rf@...nsource.cirrus.com>
To: <broonie@...nel.org>
CC: <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>
Subject: [PATCH] regmap: regmap_multi_reg_read(): make register list const

Mark the list of registers passed into regmap_multi_reg_read() as a
pointer to const. This allows the caller to define the register list
as const data.

This requires making the same change to _regmap_bulk_read(), which is
called by regmap_multi_reg_read().

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 drivers/base/regmap/regmap.c | 4 ++--
 include/linux/regmap.h       | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index ff37701b6d6c..f2843f814675 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -3115,7 +3115,7 @@ int regmap_fields_read(struct regmap_field *field, unsigned int id,
 EXPORT_SYMBOL_GPL(regmap_fields_read);
 
 static int _regmap_bulk_read(struct regmap *map, unsigned int reg,
-			     unsigned int *regs, void *val, size_t val_count)
+			     const unsigned int *regs, void *val, size_t val_count)
 {
 	u32 *u32 = val;
 	u16 *u16 = val;
@@ -3209,7 +3209,7 @@ EXPORT_SYMBOL_GPL(regmap_bulk_read);
  * A value of zero will be returned on success, a negative errno will
  * be returned in error cases.
  */
-int regmap_multi_reg_read(struct regmap *map, unsigned int *regs, void *val,
+int regmap_multi_reg_read(struct regmap *map, const unsigned int *regs, void *val,
 			  size_t val_count)
 {
 	if (val_count == 0)
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index fd41baccbf3e..3871c74f7677 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1244,7 +1244,7 @@ int regmap_noinc_read(struct regmap *map, unsigned int reg,
 		      void *val, size_t val_len);
 int regmap_bulk_read(struct regmap *map, unsigned int reg, void *val,
 		     size_t val_count);
-int regmap_multi_reg_read(struct regmap *map, unsigned int *reg, void *val,
+int regmap_multi_reg_read(struct regmap *map, const unsigned int *reg, void *val,
 			  size_t val_count);
 int regmap_update_bits_base(struct regmap *map, unsigned int reg,
 			    unsigned int mask, unsigned int val,
-- 
2.39.5