From a6d99022e56e8c1ddc4c75895ed9e3ce5da88453 Mon Sep 17 00:00:00 2001
From: Michael Walle <michael@walle.cc>
Date: Mon, 21 Nov 2022 16:08:42 +0100
Subject: [PATCH] regmap: add regmap_might_sleep()
With the dawn of MMIO gpio-regmap users, it is desirable to let
gpio-regmap ask the regmap if it might sleep during an access so
it can pass that information to gpiochip. Add a new regmap_might_sleep()
to query the regmap.
Signed-off-by: Michael Walle <michael@walle.cc>
Link: https://lore.kernel.org/r/20221121150843.1562603-1-michael@walle.cc
Signed-off-by: Mark Brown <broonie@kernel.org>
---
drivers/base/regmap/regmap.c | 13 +++++++++++++
include/linux/regmap.h | 7 +++++++
2 files changed, 20 insertions(+)
diff --git a/drivers/base/regmap/regmap.c b/drivers/base/regmap/regmap.c
index c6d6d53e8cd3f..d12d669157f24 100644
--- a/drivers/base/regmap/regmap.c
+++ b/drivers/base/regmap/regmap.c
@@ -3486,6 +3486,19 @@ int regmap_get_reg_stride(struct regmap *map)
}
EXPORT_SYMBOL_GPL(regmap_get_reg_stride);
+/**
+ * regmap_might_sleep() - Returns whether a regmap access might sleep.
+ *
+ * @map: Register map to operate on.
+ *
+ * Returns true if an access to the register might sleep, else false.
+ */
+bool regmap_might_sleep(struct regmap *map)
+{
+ return map->can_sleep;
+}
+EXPORT_SYMBOL_GPL(regmap_might_sleep);
+
int regmap_parse_val(struct regmap *map, const void *buf,
unsigned int *val)
{
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index ca3434dca3a06..3faf5d5dbb26d 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -1219,6 +1219,7 @@ static inline int regmap_write_bits(struct regmap *map, unsigned int reg,
int regmap_get_val_bytes(struct regmap *map);
int regmap_get_max_register(struct regmap *map);
int regmap_get_reg_stride(struct regmap *map);
+bool regmap_might_sleep(struct regmap *map);
int regmap_async_complete(struct regmap *map);
bool regmap_can_raw_write(struct regmap *map);
size_t regmap_get_raw_read_max(struct regmap *map);
@@ -1905,6 +1906,12 @@ static inline int regmap_get_reg_stride(struct regmap *map)
return -EINVAL;
}
+static inline bool regmap_might_sleep(struct regmap *map)
+{
+ WARN_ONCE(1, "regmap API is disabled");
+ return true;
+}
+
static inline int regcache_sync(struct regmap *map)
{
WARN_ONCE(1, "regmap API is disabled");