1 files changed, 38 insertions, 3 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index a90abb6bfa64..9dbc9a1bec43 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -46,7 +46,13 @@ struct reg_default {
 /**
  * Configuration for the register map of a device.
  *
+ * @name: Optional name of the regmap. Useful when a device has multiple
+ *        register regions.
+ *
  * @reg_bits: Number of bits in a register address, mandatory.
+ * @reg_stride: The register address stride. Valid register addresses are a
+ *              multiple of this value. If set to 0, a value of 1 will be
+ *              used.
  * @pad_bits: Number of bits of padding between register and value.
  * @val_bits: Number of bits in a register value, mandatory.
  *
@@ -70,6 +76,9 @@ struct reg_default {
  * @write_flag_mask: Mask to be set in the top byte of the register when doing
  *                   a write. If both read_flag_mask and write_flag_mask are
  *                   empty the regmap_bus default masks are used.
+ * @use_single_rw: If set, converts the bulk read and write operations into
+ *                  a series of single read and write operations. This is useful
+ *                  for device that does not support bulk read and write.
  *
  * @cache_type: The actual cache type.
  * @reg_defaults_raw: Power on reset values for registers (for use with
@@ -77,7 +86,10 @@ struct reg_default {
  * @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
  */
 struct regmap_config {
+        const char *name;
+
         int reg_bits;
+        int reg_stride;
         int pad_bits;
         int val_bits;
 
@@ -95,20 +107,25 @@ struct regmap_config {
 
         u8 read_flag_mask;
         u8 write_flag_mask;
+
+        bool use_single_rw;
 };
 
-typedef int (*regmap_hw_write)(struct device *dev, const void *data,
+typedef int (*regmap_hw_write)(void *context, const void *data,
                                size_t count);
-typedef int (*regmap_hw_gather_write)(struct device *dev,
+typedef int (*regmap_hw_gather_write)(void *context,
                                       const void *reg, size_t reg_len,
                                       const void *val, size_t val_len);
-typedef int (*regmap_hw_read)(struct device *dev,
+typedef int (*regmap_hw_read)(void *context,
                               const void *reg_buf, size_t reg_size,
                               void *val_buf, size_t val_size);
+typedef void (*regmap_hw_free_context)(void *context);
 
 /**
  * Description of a hardware bus for the register map infrastructure.
  *
+ * @fast_io: Register IO is fast. Use a spinlock instead of a mutex
+ *           to perform locking.
  * @write: Write operation.
  * @gather_write: Write operation with split register/value, return -ENOTSUPP
  *                if not implemented  on a given device.
@@ -118,31 +135,42 @@ typedef int (*regmap_hw_read)(struct device *dev,
  *                  a read.
  */
 struct regmap_bus {
+        bool fast_io;
         regmap_hw_write write;
         regmap_hw_gather_write gather_write;
         regmap_hw_read read;
+        regmap_hw_free_context free_context;
         u8 read_flag_mask;
 };
 
 struct regmap *regmap_init(struct device *dev,
                            const struct regmap_bus *bus,
+                           void *bus_context,
                            const struct regmap_config *config);
 struct regmap *regmap_init_i2c(struct i2c_client *i2c,
                                const struct regmap_config *config);
 struct regmap *regmap_init_spi(struct spi_device *dev,
                                const struct regmap_config *config);
+struct regmap *regmap_init_mmio(struct device *dev,
+                                void __iomem *regs,
+                                const struct regmap_config *config);
 
 struct regmap *devm_regmap_init(struct device *dev,
                                 const struct regmap_bus *bus,
+                                void *bus_context,
                                 const struct regmap_config *config);
 struct regmap *devm_regmap_init_i2c(struct i2c_client *i2c,
                                     const struct regmap_config *config);
 struct regmap *devm_regmap_init_spi(struct spi_device *dev,
                                     const struct regmap_config *config);
+struct regmap *devm_regmap_init_mmio(struct device *dev,
+                                     void __iomem *regs,
+                                     const struct regmap_config *config);
 
 void regmap_exit(struct regmap *map);
 int regmap_reinit_cache(struct regmap *map,
                         const struct regmap_config *config);
+struct regmap *dev_get_regmap(struct device *dev, const char *name);
 int regmap_write(struct regmap *map, unsigned int reg, unsigned int val);
 int regmap_raw_write(struct regmap *map, unsigned int reg,
                      const void *val, size_t val_len);
@@ -327,6 +355,13 @@ static inline int regmap_register_patch(struct regmap *map,
         return -EINVAL;
 }
 
+static inline struct regmap *dev_get_regmap(struct device *dev,
+                                            const char *name)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return NULL;
+}
+
 #endif
 
 #endif