fsi: Add regmap and refactor sbefifo

Merge series from Eddie James <eajames@linux.ibm.com>:

The SBEFIFO hardware can now be attached over a new I2C endpoint interface
called the I2C Responder (I2CR). In order to use the existing SBEFIFO
driver, add a regmap driver for the FSI bus and an endpoint driver for the
I2CR. Then, refactor the SBEFIFO and OCC drivers to clean up and use the
new regmap driver or the I2CR interface.

This branch just has the regmap change so it can be shared with the FSI
code.

1 files changed, 37 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 3faf5d5dbb26..5a56fc55ebd7 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -24,6 +24,7 @@ struct module;
 struct clk;
 struct device;
 struct device_node;
+struct fsi_device;
 struct i2c_client;
 struct i3c_device;
 struct irq_domain;
@@ -628,6 +629,10 @@ struct regmap *__regmap_init_spi_avmm(struct spi_device *spi,
 				      const struct regmap_config *config,
 				      struct lock_class_key *lock_key,
 				      const char *lock_name);
+struct regmap *__regmap_init_fsi(struct fsi_device *fsi_dev,
+				 const struct regmap_config *config,
+				 struct lock_class_key *lock_key,
+				 const char *lock_name);
 
 struct regmap *__devm_regmap_init(struct device *dev,
 				  const struct regmap_bus *bus,
@@ -693,6 +698,11 @@ struct regmap *__devm_regmap_init_spi_avmm(struct spi_device *spi,
 					   const struct regmap_config *config,
 					   struct lock_class_key *lock_key,
 					   const char *lock_name);
+struct regmap *__devm_regmap_init_fsi(struct fsi_device *fsi_dev,
+				      const struct regmap_config *config,
+				      struct lock_class_key *lock_key,
+				      const char *lock_name);
+
 /*
  * Wrapper for regmap_init macros to include a unique lockdep key and name
  * for each call. No-op if CONFIG_LOCKDEP is not set.
@@ -920,6 +930,19 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
 				 spi, config)
 
 /**
+ * regmap_init_fsi() - Initialise register map
+ *
+ * @fsi_dev: 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_fsi(fsi_dev, config)				\
+	__regmap_lockdep_wrapper(__regmap_init_fsi, #config, fsi_dev,	\
+				 config)
+
+/**
  * devm_regmap_init() - Initialise managed register map
  *
  * @dev: Device that will be interacted with
@@ -1148,6 +1171,20 @@ bool regmap_ac97_default_volatile(struct device *dev, unsigned int reg);
 	__regmap_lockdep_wrapper(__devm_regmap_init_spi_avmm, #config,	\
 				 spi, config)
 
+/**
+ * devm_regmap_init_fsi() - Initialise managed register map
+ *
+ * @fsi_dev: 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.  The regmap will be automatically freed by the
+ * device management code.
+ */
+#define devm_regmap_init_fsi(fsi_dev, config)				\
+	__regmap_lockdep_wrapper(__devm_regmap_init_fsi, #config,	\
+				 fsi_dev, config)
+
 int regmap_mmio_attach_clk(struct regmap *map, struct clk *clk);
 void regmap_mmio_detach_clk(struct regmap *map);
 void regmap_exit(struct regmap *map);