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ASoC: cs4271: add support for AMUTEB=BMUTEC feature 

The CS4271 has a feature to sync its analog mute flags, so one mute
circuitry can be used for both channels.

Give users access to this feature with a new DT property and a flag in
the platform data.

Signed-off-by: Daniel Mack <zonque@gmail.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Daniel Mack 2012-10-04 14:03:23 +02:00 committed by Mark Brown
parent ddffeb8c4d
commit 293750f9bc
3 changed files with 21 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/devicetree/bindings/sound/cs4271.txt
View File

@ -18,6 +18,8 @@ Optional properties:
- reset-gpio: a GPIO spec to define which pin is connected to the chip's
!RESET pin
- cirrus,amuteb-eq-bmutec: When given, the Codec's AMUTEB=BMUTEC flag
is enabled.
Examples:

1
include/sound/cs4271.h
View File

@ -19,6 +19,7 @@
struct cs4271_platform_data {
int gpio_nreset; /* GPIO driving Reset pin, if any */
int amutec_eq_bmutec:1; /* flag to enable AMUTEC=BMUTEC */
};
#endif /* __CS4271_H */

21
sound/soc/codecs/cs4271.c
View File

@ -474,15 +474,25 @@ static int cs4271_probe(struct snd_soc_codec *codec)
struct cs4271_platform_data *cs4271plat = codec->dev->platform_data;
int ret;
int gpio_nreset = -EINVAL;
int amutec_eq_bmutec = 0;
#ifdef CONFIG_OF
if (of_match_device(cs4271_dt_ids, codec->dev))
if (of_match_device(cs4271_dt_ids, codec->dev)) {
gpio_nreset = of_get_named_gpio(codec->dev->of_node,
"reset-gpio", 0);
if (!of_get_property(codec->dev->of_node,
"cirrus,amutec-eq-bmutec", NULL))
amutec_eq_bmutec = 1;
}
#endif
if (cs4271plat && gpio_is_valid(cs4271plat->gpio_nreset))
gpio_nreset = cs4271plat->gpio_nreset;
if (cs4271plat) {
if (gpio_is_valid(cs4271plat->gpio_nreset))
gpio_nreset = cs4271plat->gpio_nreset;
amutec_eq_bmutec = cs4271plat->amutec_eq_bmutec;
}
if (gpio_nreset >= 0)
if (gpio_request(gpio_nreset, "CS4271 Reset"))
@ -528,6 +538,11 @@ static int cs4271_probe(struct snd_soc_codec *codec)
/* Power-up sequence requires 85 uS */
udelay(85);
if (amutec_eq_bmutec)
snd_soc_update_bits(codec, CS4271_MODE2,
CS4271_MODE2_MUTECAEQUB,
CS4271_MODE2_MUTECAEQUB);
return snd_soc_add_codec_controls(codec, cs4271_snd_controls,
ARRAY_SIZE(cs4271_snd_controls));
}