011f2c26f1
As usual these patches were extracted and rebased from the raspberry pi repo: https://github.com/raspberrypi/linux/tree/rpi-4.4.y Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
104 lines
3.6 KiB
Diff
104 lines
3.6 KiB
Diff
From 00fa941a2c5be22d7ab5034458b1275d108c18bb Mon Sep 17 00:00:00 2001
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From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
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Date: Thu, 14 Apr 2016 01:00:58 +0100
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Subject: [PATCH] Add support for the Digital Dreamtime Akkordion music player.
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Support the Digital Dreamtime Akkordion using the OEM IQAudIO DAC+ or
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DACZero modules. Set ALSA card name, ("Akkordion"), from dt config.
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Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
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---
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arch/arm/boot/dts/overlays/Makefile | 1 +
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arch/arm/boot/dts/overlays/README | 20 ++++++++++
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.../dts/overlays/akkordion-iqdacplus-overlay.dts | 46 ++++++++++++++++++++++
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3 files changed, 67 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/akkordion-iqdacplus-overlay.dts
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--- a/arch/arm/boot/dts/overlays/Makefile
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+++ b/arch/arm/boot/dts/overlays/Makefile
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@@ -13,6 +13,7 @@ ifeq ($(CONFIG_ARCH_BCM2835),y)
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endif
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dtbo-$(RPI_DT_OVERLAYS) += ads7846.dtbo
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+dtbo-$(RPI_DT_OVERLAYS) += akkordion-iqdacplus.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += at86rf233.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += bmp085_i2c-sensor.dtbo
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dtbo-$(RPI_DT_OVERLAYS) += dpi24.dtbo
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -186,6 +186,26 @@ Params: cs SPI bus
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www.kernel.org/doc/Documentation/devicetree/bindings/input/ads7846.txt
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+Name: akkordion-iqdacplus
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+Info: Configures the Digital Dreamtime Akkordion Music Player (based on the
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+ OEM IQAudIO DAC+ or DAC Zero module).
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+Load: dtoverlay=akkordion-iqdacplus,<param>=<val>
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+Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec
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+ Digital volume control. Enable with
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+ dtoverlay=akkordion-iqdacplus,24db_digital_gain
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+ (The default behaviour is that the Digital
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+ volume control is limited to a maximum of
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+ 0dB. ie. it can attenuate but not provide
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+ gain. For most users, this will be desired
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+ as it will prevent clipping. By appending
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+ the 24db_digital_gain parameter, the Digital
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+ volume control will allow up to 24dB of
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+ gain. If this parameter is enabled, it is the
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+ responsibility of the user to ensure that
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+ the Digital volume control is set to a value
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+ that does not result in clipping/distortion!)
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+
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+
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Name: at86rf233
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Info: Configures the Atmel AT86RF233 802.15.4 low-power WPAN transceiver,
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connected to spi0.0
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/akkordion-iqdacplus-overlay.dts
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@@ -0,0 +1,46 @@
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+// Definitions for Digital Dreamtime Akkordion using IQaudIO DAC+ or DACZero
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+/dts-v1/;
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+/plugin/;
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+
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+/ {
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+ compatible = "brcm,bcm2708";
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+
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+ fragment@0 {
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+ target = <&sound>;
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+ frag0: __overlay__ {
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+ compatible = "iqaudio,iqaudio-dac";
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+ card_name = "Akkordion";
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+ dai_name = "IQaudIO DAC";
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+ dai_stream_name = "IQaudIO DAC HiFi";
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+ i2s-controller = <&i2s>;
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&i2s>;
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+ __overlay__ {
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+ status = "okay";
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&i2c1>;
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+ __overlay__ {
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+ #address-cells = <1>;
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+ #size-cells = <0>;
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+ status = "okay";
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+
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+ pcm5122@4c {
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+ #sound-dai-cells = <0>;
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+ compatible = "ti,pcm5122";
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+ reg = <0x4c>;
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+ status = "okay";
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+ };
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+ };
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+ };
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+
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+ __overrides__ {
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+ 24db_digital_gain = <&frag0>,"iqaudio,24db_digital_gain?";
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+ };
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+};
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