diff options
| author | Peter Rosin | 2016-11-15 19:38:14 +0100 |
|---|---|---|
| committer | Mark Brown | 2016-11-16 11:12:41 +0000 |
| commit | c821d30148caab01f2559980ed322667e2919b99 (patch) | |
| tree | fcbea2eebedb32bf382071ed6bef5a6af5182dea | |
| parent | a85787edaaf7bc77ed011c89e23d52b3ff352c51 (diff) | |
ASoC: tse850: document axentia,tse850-pcm5142 bindings
The TSE-850 is an FM Transmitter Station Equipment, designed to generate
baseband signals for FM, mainly the DARC subcarrier, but other signals
are also possible.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Peter Rosin <peda@axentia.se>
Signed-off-by: Mark Brown <broonie@kernel.org>
| -rw-r--r-- | Documentation/devicetree/bindings/sound/axentia,tse850-pcm5142.txt | 88 | ||||
| -rw-r--r-- | MAINTAINERS | 6 |
2 files changed, 94 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/axentia,tse850-pcm5142.txt b/Documentation/devicetree/bindings/sound/axentia,tse850-pcm5142.txt new file mode 100644 index 000000000000..5b9b38f578bb --- /dev/null +++ b/Documentation/devicetree/bindings/sound/axentia,tse850-pcm5142.txt @@ -0,0 +1,88 @@ +Devicetree bindings for the Axentia TSE-850 audio complex + +Required properties: + - compatible: "axentia,tse850-pcm5142" + - axentia,ssc-controller: The phandle of the atmel SSC controller used as + cpu dai. + - axentia,audio-codec: The phandle of the PCM5142 codec. + - axentia,add-gpios: gpio specifier that controls the mixer. + - axentia,loop1-gpios: gpio specifier that controls loop relays on channel 1. + - axentia,loop2-gpios: gpio specifier that controls loop relays on channel 2. + - axentia,ana-supply: Regulator that supplies the output amplifier. Must + support voltages in the 2V - 20V range, in 1V steps. + +The schematics explaining the gpios are as follows: + + loop1 relays + IN1 +---o +------------+ o---+ OUT1 + \ / + + + + | / | + +--o +--. | + | add | | + | V | + | .---. | + DAC +----------->|Sum|---+ + | '---' | + | | + + + + + IN2 +---o--+------------+--o---+ OUT2 + loop2 relays + +The 'loop1' gpio pin controlls two relays, which are either in loop position, +meaning that input and output are directly connected, or they are in mixer +position, meaning that the signal is passed through the 'Sum' mixer. Similarly +for 'loop2'. + +In the above, the 'loop1' relays are inactive, thus feeding IN1 to the mixer +(if 'add' is active) and feeding the mixer output to OUT1. The 'loop2' relays +are active, short-cutting the TSE-850 from channel 2. IN1, IN2, OUT1 and OUT2 +are TSE-850 connectors and DAC is the PCB name of the (filtered) output from +the PCM5142 codec. + +Example: + + &i2c { + codec: pcm5142@4c { + compatible = "ti,pcm5142"; + + reg = <0x4c>; + + AVDD-supply = <®_3v3>; + DVDD-supply = <®_3v3>; + CPVDD-supply = <®_3v3>; + + clocks = <&sck>; + + pll-in = <3>; + pll-out = <6>; + }; + }; + + ana: ana-reg { + compatible = "pwm-regulator"; + + regulator-name = "ANA"; + + pwms = <&pwm0 2 1000 PWM_POLARITY_INVERTED>; + pwm-dutycycle-unit = <1000>; + pwm-dutycycle-range = <100 1000>; + + regulator-min-microvolt = <2000000>; + regulator-max-microvolt = <20000000>; + regulator-ramp-delay = <1000>; + }; + + sound { + compatible = "axentia,tse850-pcm5142"; + + axentia,ssc-controller = <&ssc0>; + axentia,audio-codec = <&codec>; + + axentia,add-gpios = <&pioA 8 GPIO_ACTIVE_LOW>; + axentia,loop1-gpios = <&pioA 10 GPIO_ACTIVE_LOW>; + axentia,loop2-gpios = <&pioA 11 GPIO_ACTIVE_LOW>; + + axentia,ana-supply = <&ana>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 1cd38a7e0064..35485fd86e73 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2317,6 +2317,12 @@ F: include/uapi/linux/ax25.h F: include/net/ax25.h F: net/ax25/ +AXENTIA ASOC DRIVERS +M: Peter Rosin <peda@axentia.se> +L: alsa-devel@alsa-project.org (moderated for non-subscribers) +S: Maintained +F: Documentation/devicetree/bindings/sound/axentia,* + AZ6007 DVB DRIVER M: Mauro Carvalho Chehab <mchehab@s-opensource.com> M: Mauro Carvalho Chehab <mchehab@kernel.org> |