[twobob]

ls of /dev/snd

[root@kindle snd]# ls

controlC0 pcmC0D0c pcmC0D0p timer

p is playback
c is capture

And from Knc1's docs:

#define WM8960_RATES SNDRV_PCM_RATE_8000_48000

#define WM8960_FORMATS \
	(SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
	SNDRV_PCM_FMTBIT_S24_LE)

and

static struct snd_soc_dai_driver wm8960_dai = {
	.name = "wm8960-hifi",
	.playback = {
		.stream_name = "Playback",
		.channels_min = 1,
		.channels_max = 2,
		.rates = WM8960_RATES,
		.formats = WM8960_FORMATS,},
	.capture = {
		.stream_name = "Capture",
		.channels_min = 1,
		.channels_max = 2,
		.rates = WM8960_RATES,
		.formats = WM8960_FORMATS,},
	.ops = &wm8960_dai_ops,
	.symmetric_rates = 1,
};