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| author | Tim Gardner <tim.gardner@canonical.com> | 2013-03-11 13:18:23 -0600 |
|---|---|---|
| committer | Ben Hutchings <ben@decadent.org.uk> | 2017-11-11 13:34:42 +0000 |
| commit | ec7deb5897ca9b158713c8c06fb79769606dd7ce (patch) | |
| tree | 83b94084889f74adf9907ec65a1623edcfb3689e /sound | |
| parent | b88ca975802fdfc636f36df763628d41a4bd68d4 (diff) | |
| download | linux-stable-ec7deb5897ca9b158713c8c06fb79769606dd7ce.tar.gz linux-stable-ec7deb5897ca9b158713c8c06fb79769606dd7ce.tar.bz2 linux-stable-ec7deb5897ca9b158713c8c06fb79769606dd7ce.zip | |
ASoC: adau1373: adau1373_hw_params: Silence overflow warning
commit 14a1b8ca172f4cfbc544051a729d85a380447a82 upstream.
ADAU1373_BCLKDIV_SOURCE is defined as BIT(5) which uses UL constants. On
amd64 the result of the ones complement operator is then truncated to
unsigned int according to the prototype of snd_soc_update_bits(). I think
gcc is correctly warning that the upper 32 bits are lost.
sound/soc/codecs/adau1373.c: In function 'adau1373_hw_params':
sound/soc/codecs/adau1373.c:940:3: warning: large integer implicitly truncated to unsigned type [-Woverflow]
gcc version 4.6.3
Add 2 more BCLKDIV mask macros as explained by Lars:
The BCLKDIV has three fields. The bitclock divider (bit 0-1), the samplerate
(bit 2-4) and the source select (bit 5). Here we want to update the bitclock
divider field and the samplerate field. When I wrote the code I was lazy and
used ~ADAU1373_BCLKDIV_SOURCE as the mask, which for this register is
functionally equivalent to ADAU1373_BCLKDIV_SR_MASK | ADAU1373_BCLKDIV_BCLK_MASK.
Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
Acked-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/soc/codecs/adau1373.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/sound/soc/codecs/adau1373.c b/sound/soc/codecs/adau1373.c index 45c63028b40d..396f356221b5 100644 --- a/sound/soc/codecs/adau1373.c +++ b/sound/soc/codecs/adau1373.c @@ -133,6 +133,8 @@ struct adau1373 { #define ADAU1373_DAI_FORMAT_DSP 0x3 #define ADAU1373_BCLKDIV_SOURCE BIT(5) +#define ADAU1373_BCLKDIV_SR_MASK (0x07 << 2) +#define ADAU1373_BCLKDIV_BCLK_MASK 0x03 #define ADAU1373_BCLKDIV_32 0x03 #define ADAU1373_BCLKDIV_64 0x02 #define ADAU1373_BCLKDIV_128 0x01 @@ -937,7 +939,8 @@ static int adau1373_hw_params(struct snd_pcm_substream *substream, adau1373_dai->enable_src = (div != 0); snd_soc_update_bits(codec, ADAU1373_BCLKDIV(dai->id), - ~ADAU1373_BCLKDIV_SOURCE, (div << 2) | ADAU1373_BCLKDIV_64); + ADAU1373_BCLKDIV_SR_MASK | ADAU1373_BCLKDIV_BCLK_MASK, + (div << 2) | ADAU1373_BCLKDIV_64); switch (params_format(params)) { case SNDRV_PCM_FORMAT_S16_LE: |