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[PATCH 3.2 10/70] ALSA: tlv: add DECLARE_TLV_DB_RANGE()

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  [PATCH 3.2 10/70] ALSA: tlv: add DECLARE_TLV_DB_RANGE() Ben Hutchings <ben@decadent.org.uk> - 2016-01-18 04:30 +0100

#1311232 — [PATCH 3.2 10/70] ALSA: tlv: add DECLARE_TLV_DB_RANGE()

3.2.76-rc1 review patch.  If anyone has any objections, please let me know.

------------------

From: Clemens Ladisch <clemens@ladisch.de>

commit bf1d1c9b6179faa3bc32cee882462bc8eebde25d upstream.

Add a DECLARE_TLV_DB_RANGE() macro so that dB range information
can be specified without having to count the items manually for
TLV_DB_RANGE_HEAD().

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
 include/sound/tlv.h | 4 ++++
 1 file changed, 4 insertions(+)

--- a/include/sound/tlv.h
+++ b/include/sound/tlv.h
@@ -71,6 +71,10 @@
 
 /* dB range container */
 /* Each item is: <min> <max> <TLV> */
+#define TLV_DB_RANGE_ITEM(...) \
+	TLV_ITEM(SNDRV_CTL_TLVT_DB_RANGE, __VA_ARGS__)
+#define DECLARE_TLV_DB_RANGE(name, ...) \
+	unsigned int name[] = { TLV_DB_RANGE_ITEM(__VA_ARGS__) }
 /* The below assumes that each item TLV is 4 words like DB_SCALE or LINEAR */
 #define TLV_DB_RANGE_HEAD(num)			\
 	SNDRV_CTL_TLVT_DB_RANGE, 6 * (num) * sizeof(unsigned int)

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