firmware: cs_dsp: Clarify some kernel doc comments

Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20211117132300.1290-8-ckeepax@opensource.cirrus.comSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/firmware/cirrus/cs_dsp.c

@@ -746,7 +746,7 @@ static int cs_dsp_coeff_write_ctrl_raw(struct cs_dsp_coeff_ctl *ctl,
  * cs_dsp_coeff_write_ctrl() - Writes the given buffer to the given coefficient control
  * @ctl: pointer to coefficient control
  * @buf: the buffer to write to the given control
- * @len: the length of the buffer
+ * @len: the length of the buffer in bytes
  *
  * Must be called with pwr_lock held.
  *
@@ -808,7 +808,7 @@ static int cs_dsp_coeff_read_ctrl_raw(struct cs_dsp_coeff_ctl *ctl, void *buf, s
  * cs_dsp_coeff_read_ctrl() - Reads the given coefficient control into the given buffer
  * @ctl: pointer to coefficient control
  * @buf: the buffer to store to the given control
- * @len: the length of the buffer
+ * @len: the length of the buffer in bytes
  *
  * Must be called with pwr_lock held.
  *

include/linux/firmware/cirrus/cs_dsp.h

@@ -76,8 +76,8 @@ struct cs_dsp_alg_region {
  * @enabled:		Flag indicating whether control is enabled
  * @list:		List node for internal use
  * @cache:		Cached value of the control
- * @offset:		Offset of control within alg_region
- * @len:		Length of the cached value
+ * @offset:		Offset of control within alg_region in words
+ * @len:		Length of the cached value in bytes
  * @set:		Flag indicating the value has been written by the user
  * @flags:		Bitfield of WMFW_CTL_FLAG_ control flags defined in wmfw.h
  * @type:		One of the WMFW_CTL_TYPE_ control types defined in wmfw.h