2 files changed, 152 insertions, 0 deletions

diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index 4a957fdb46f..56ca477d509 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -19,6 +19,7 @@
 struct module;
 struct i2c_client;
 struct spi_device;
+struct regmap;
 
 /* An enum of all the supported cache types */
 enum regcache_type {
@@ -40,10 +41,13 @@ struct reg_default {
         unsigned int def;
 };
 
+#ifdef CONFIG_REGMAP
+
 /**
  * Configuration for the register map of a device.
  *
  * @reg_bits: Number of bits in a register address, mandatory.
+ * @pad_bits: Number of bits of padding between register and value.
  * @val_bits: Number of bits in a register value, mandatory.
  *
  * @writeable_reg: Optional callback returning true if the register
@@ -74,6 +78,7 @@ struct reg_default {
  */
 struct regmap_config {
         int reg_bits;
+        int pad_bits;
         int val_bits;
 
         bool (*writeable_reg)(struct device *dev, unsigned int reg);
@@ -208,4 +213,115 @@ int regmap_add_irq_chip(struct regmap *map, int irq, int irq_flags,
 void regmap_del_irq_chip(int irq, struct regmap_irq_chip_data *data);
 int regmap_irq_chip_get_base(struct regmap_irq_chip_data *data);
 
+#else
+
+/*
+ * These stubs should only ever be called by generic code which has
+ * regmap based facilities, if they ever get called at runtime
+ * something is going wrong and something probably needs to select
+ * REGMAP.
+ */
+
+static inline int regmap_write(struct regmap *map, unsigned int reg,
+                               unsigned int val)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_raw_write(struct regmap *map, unsigned int reg,
+                                   const void *val, size_t val_len)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_bulk_write(struct regmap *map, unsigned int reg,
+                                    const void *val, size_t val_count)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_read(struct regmap *map, unsigned int reg,
+                              unsigned int *val)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_raw_read(struct regmap *map, unsigned int reg,
+                                  void *val, size_t val_len)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_bulk_read(struct regmap *map, unsigned int reg,
+                                   void *val, size_t val_count)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_update_bits(struct regmap *map, unsigned int reg,
+                                     unsigned int mask, unsigned int val)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_update_bits_check(struct regmap *map,
+                                           unsigned int reg,
+                                           unsigned int mask, unsigned int val,
+                                           bool *change)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regmap_get_val_bytes(struct regmap *map)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regcache_sync(struct regmap *map)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline int regcache_sync_region(struct regmap *map, unsigned int min,
+                                       unsigned int max)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+static inline void regcache_cache_only(struct regmap *map, bool enable)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+}
+
+static inline void regcache_cache_bypass(struct regmap *map, bool enable)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+}
+
+static inline void regcache_mark_dirty(struct regmap *map)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+}
+
+static inline int regmap_register_patch(struct regmap *map,
+                                        const struct reg_default *regs,
+                                        int num_regs)
+{
+        WARN_ONCE(1, "regmap API is disabled");
+        return -EINVAL;
+}
+
+#endif
+
 #endif
diff --git a/include/trace/events/regmap.h b/include/trace/events/regmap.h
index 12fbf43524e..d69738280ff 100644
--- a/include/trace/events/regmap.h
+++ b/include/trace/events/regmap.h
@@ -139,6 +139,42 @@ TRACE_EVENT(regcache_sync,
                   __get_str(type), __get_str(status))
 );
 
+DECLARE_EVENT_CLASS(regmap_bool,
+
+        TP_PROTO(struct device *dev, bool flag),
+
+        TP_ARGS(dev, flag),
+
+        TP_STRUCT__entry(
+                __string(       name,           dev_name(dev)   )
+                __field(        int,            flag            )
+        ),
+
+        TP_fast_assign(
+                __assign_str(name, dev_name(dev));
+                __entry->flag = flag;
+        ),
+
+        TP_printk("%s flag=%d", __get_str(name),
+                  (int)__entry->flag)
+);
+
+DEFINE_EVENT(regmap_bool, regmap_cache_only,
+
+        TP_PROTO(struct device *dev, bool flag),
+
+        TP_ARGS(dev, flag)
+
+);
+
+DEFINE_EVENT(regmap_bool, regmap_cache_bypass,
+
+        TP_PROTO(struct device *dev, bool flag),
+
+        TP_ARGS(dev, flag)
+
+);
+
 #endif /* _TRACE_REGMAP_H */
 
 /* This part must be outside protection */