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-rw-r--r--include/linux/regmap.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/regmap.h b/include/linux/regmap.h
index e3ed73658e12..5c2058126f48 100644
--- a/include/linux/regmap.h
+++ b/include/linux/regmap.h
@@ -107,6 +107,8 @@ 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.
@@ -116,6 +118,7 @@ typedef void (*regmap_hw_free_context)(void *context);
* a read.
*/
struct regmap_bus {
+ bool fast_io;
regmap_hw_write write;
regmap_hw_gather_write gather_write;
regmap_hw_read read;