target/linux/brcm2708/patches-3.14/0051-Use-a-range-macro-for-Playback-Volume.patch

   1 From 53f059eb1ce439b171516c0e6673ab88ca25e166 Mon Sep 17 00:00:00 2001
   2 From: Howard Mitchell <hm@hmbedded.co.uk>
   3 Date: Fri, 28 Mar 2014 16:40:31 +0000
   4 Subject: [PATCH 51/54] Use a range macro for Playback Volume.
   5
   6 This allows limiting the output gain to avoid clipping in the
   7 DAC ouput stages.
   8 ---
   9  sound/soc/codecs/pcm512x.c | 4 ++--
  10  1 file changed, 2 insertions(+), 2 deletions(-)
  11
  12 --- a/sound/soc/codecs/pcm512x.c
  13 +++ b/sound/soc/codecs/pcm512x.c
  14 @@ -240,8 +240,8 @@ static const struct soc_enum pcm512x_ved
  15                         pcm512x_ramp_step_text);
  16
  17  static const struct snd_kcontrol_new pcm512x_controls[] = {
  18 -SOC_DOUBLE_R_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2,
  19 -                PCM512x_DIGITAL_VOLUME_3, 0, 255, 1, digital_tlv),
  20 +SOC_DOUBLE_R_RANGE_TLV("Playback Digital Volume", PCM512x_DIGITAL_VOLUME_2,
  21 +                PCM512x_DIGITAL_VOLUME_3, 0, 48, 255, 1, digital_tlv),
  22  SOC_DOUBLE("Playback Digital Switch", PCM512x_MUTE, PCM512x_RQML_SHIFT,
  23            PCM512x_RQMR_SHIFT, 1, 1),
  24