1 files changed, 39 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 56af22ec9aba..5f69d4ad3eb1 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -14,12 +14,14 @@
  */
 
 #include <linux/list.h>
+#include <linux/rbtree.h>
 
 struct module;
 struct device;
 struct i2c_client;
 struct spi_device;
 struct regmap;
+struct regmap_range_cfg;
 
 /* An enum of all the supported cache types */
 enum regcache_type {
@@ -84,6 +86,9 @@ struct reg_default {
  * @reg_defaults_raw: Power on reset values for registers (for use with
  *                    register cache support).
  * @num_reg_defaults_raw: Number of elements in reg_defaults_raw.
+ *
+ * @ranges: Array of configuration entries for virtual address ranges.
+ * @num_ranges: Number of range configuration entries.
  */
 struct regmap_config {
         const char *name;
@@ -109,6 +114,40 @@ struct regmap_config {
         u8 write_flag_mask;
 
         bool use_single_rw;
+
+        const struct regmap_range_cfg *ranges;
+        unsigned int n_ranges;
+};
+
+/**
+ * Configuration for indirectly accessed or paged registers.
+ * Registers, mapped to this virtual range, are accessed in two steps:
+ *     1. page selector register update;
+ *     2. access through data window registers.
+ *
+ * @range_min: Address of the lowest register address in virtual range.
+ * @range_max: Address of the highest register in virtual range.
+ *
+ * @page_sel_reg: Register with selector field.
+ * @page_sel_mask: Bit shift for selector value.
+ * @page_sel_shift: Bit mask for selector value.
+ *
+ * @window_start: Address of first (lowest) register in data window.
+ * @window_len: Number of registers in data window.
+ */
+struct regmap_range_cfg {
+        /* Registers of virtual address range */
+        unsigned int range_min;
+        unsigned int range_max;
+
+        /* Page selector for indirect addressing */
+        unsigned int selector_reg;
+        unsigned int selector_mask;
+        int selector_shift;
+
+        /* Data window (per each page) */
+        unsigned int window_start;
+        unsigned int window_len;
 };
 
 typedef int (*regmap_hw_write)(void *context, const void *data,