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linux
ALSA: spi: Constify snd_kcontrol_new items
Most of snd_kcontrol_new definitions are read-only and passed as-is.
Let's declare them as const for further optimization.
There should be no functional changes by this patch.
Link: https://lore.kernel.org/r/20200103081714.9560-41-tiwai@suse.de
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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sound/spi/at73c213.c
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sound/spi/at73c213.c
···
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| (mask << 24) | (invert << 22)) \
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}
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static struct snd_kcontrol_new snd_at73c213_controls[] = {
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static const struct snd_kcontrol_new snd_at73c213_controls[] = {
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AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
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AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
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AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),