ASoC: davinci: fix codec start and stop functions

commit 3012f43eaf7592d8121426918e43e3b5db013aff upstream.

According to DM365 voice codec data sheet at [1], before starting
recording or playback, ADC/DAC modules should follow a reset and
enable cycle. Writing a 1 to the ADC/DAC bit in the register resets
the module and clearing the bit to 0 will enable the module. But the
driver seems to be doing the reverse of it.

[1] http://focus.ti.com/lit/ug/sprufi9b/sprufi9b.pdf

Signed-off-by: Rajashekhara, Sudhakar <sudhakar.raj@ti.com>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

diff --git a/sound/soc/davinci/davinci-vcif.c b/sound/soc/davinci/davinci-vcif.c
index bfe4ec8..1f11525 100644 (file)
--- a/sound/soc/davinci/davinci-vcif.c
+++ b/sound/soc/davinci/davinci-vcif.c
@@ -62,9 +62,9 @@ static void davinci_vcif_start(struct snd_pcm_substream *substream)
        w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
 
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
+               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
        else
-               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
+               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
 
        writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
 }
@@ -80,9 +80,9 @@ static void davinci_vcif_stop(struct snd_pcm_substream *substream)
        /* Reset transmitter/receiver and sample rate/frame sync generators */
        w = readl(davinci_vc->base + DAVINCI_VC_CTRL);
        if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 0);
+               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTDAC, 1);
        else
-               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 0);
+               MOD_REG_BIT(w, DAVINCI_VC_CTRL_RSTADC, 1);
 
        writel(w, davinci_vc->base + DAVINCI_VC_CTRL);
 }