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-rw-r--r--drivers/mfd/wm8994-core.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/drivers/mfd/wm8994-core.c b/drivers/mfd/wm8994-core.c
index e673bda21f5d..5220af26419e 100644
--- a/drivers/mfd/wm8994-core.c
+++ b/drivers/mfd/wm8994-core.c
@@ -138,6 +138,29 @@ int wm8994_reg_write(struct wm8994 *wm8994, unsigned short reg,
EXPORT_SYMBOL_GPL(wm8994_reg_write);
/**
+ * wm8994_bulk_write: Write multiple WM8994 registers
+ *
+ * @wm8994: Device to write to
+ * @reg: First register
+ * @count: Number of registers
+ * @buf: Buffer to write from.
+ */
+int wm8994_bulk_write(struct wm8994 *wm8994, unsigned short reg,
+ int count, u16 *buf)
+{
+ int ret;
+
+ mutex_lock(&wm8994->io_lock);
+
+ ret = wm8994_write(wm8994, reg, count * 2, buf);
+
+ mutex_unlock(&wm8994->io_lock);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(wm8994_bulk_write);
+
+/**
* wm8994_set_bits: Set the value of a bitfield in a WM8994 register
*
* @wm8994: Device to write to.