Add __regmap_init_i3c() and the corresponding regmap_init_i3c() macro to
allow creating a regmap for I3C devices without using the device-managed
version. This mirrors the pattern already established for other buses
such as I2C, SPI and so on, giving drivers more flexibility when
the regmap lifetime is not directly tied to the device.

Signed-off-by: Pei Xiao <xiaopei01@kylinos.cn>
---
 drivers/base/regmap/regmap-i3c.c | 10 ++++++++++
 include/linux/regmap.h           | 17 +++++++++++++++++
 2 files changed, 27 insertions(+)

diff --git a/drivers/base/regmap/regmap-i3c.c b/drivers/base/regmap/regmap-i3c.c
index 863b348704dc..5af583d472dd 100644
--- a/drivers/base/regmap/regmap-i3c.c
+++ b/drivers/base/regmap/regmap-i3c.c
@@ -46,6 +46,16 @@ static const struct regmap_bus regmap_i3c = {
 	.read = regmap_i3c_read,
 };
 
+struct regmap *__regmap_init_i3c(struct i3c_device *i3c,
+				 const struct regmap_config *config,
+				 struct lock_class_key *lock_key,
+				 const char *lock_name)
+{
+	return __regmap_init(&i3c->dev, &regmap_i3c, &i3c->dev, config,
+				  lock_key, lock_name);
+}
+EXPORT_SYMBOL_GPL(__regmap_init_i3c);
+
 struct regmap *__devm_regmap_init_i3c(struct i3c_device *i3c,
 				      const struct regmap_config *config,
 				      struct lock_class_key *lock_key,
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index f1c5cb63c171..df44cb30f53b 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -693,6 +693,10 @@ struct regmap *__regmap_init_sdw_mbq(struct device *dev, struct sdw_slave *sdw,
 				     const struct regmap_sdw_mbq_cfg *mbq_config,
 				     struct lock_class_key *lock_key,
 				     const char *lock_name);
+struct regmap *__regmap_init_i3c(struct i3c_device *i3c,
+				 const struct regmap_config *config,
+				 struct lock_class_key *lock_key,
+				 const char *lock_name);
 struct regmap *__regmap_init_spi_avmm(struct spi_device *spi,
 				      const struct regmap_config *config,
 				      struct lock_class_key *lock_key,
@@ -999,6 +1003,19 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
 	__regmap_lockdep_wrapper(__regmap_init_sdw_mbq, #config,	\
 				dev, sdw, config, mbq_config)
 
+/**
+ * regmap_init_i3c() - Initialise register map
+ *
+ * @i3c: Device that will be interacted with
+ * @config: Configuration for register map
+ *
+ * The return value will be an ERR_PTR() on error or a valid pointer to
+ * a struct regmap.
+ */
+#define regmap_init_i3c(i3c, config)					\
+	__regmap_lockdep_wrapper(__regmap_init_i3c, #config,		\
+				i3c, config)
+
 /**
  * regmap_init_spi_avmm() - Initialize register map for Intel SPI Slave
  * to AVMM Bus Bridge
-- 
2.25.1

On Fri, 10 Apr 2026 10:29:24 +0800, Pei Xiao wrote:
> regmap: i3c: Add non-devm regmap_init_i3c() helper

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap.git for-7.1

Thanks!

[1/1] regmap: i3c: Add non-devm regmap_init_i3c() helper
      https://git.kernel.org/broonie/regmap/c/8ad7f3b265a8

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark