133 lines
4.5 KiB
Diff
133 lines
4.5 KiB
Diff
From d689ccf52fb81664b7eccb91dc05a93d64ba793c Mon Sep 17 00:00:00 2001
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From: Joerg Schambacher <joerg@i2audio.com>
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Date: Fri, 29 Jan 2021 08:26:44 +0100
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Subject: [PATCH] Adds the DT-overlays to support Hifiberry AMP100
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Adds new DT-overlay to control AMP100.
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Signed-off-by: Joerg Schambacher <joerg@hifiberry.com>
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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 | 30 ++++++++-
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.../dts/overlays/hifiberry-amp100-overlay.dts | 64 +++++++++++++++++++
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3 files changed, 94 insertions(+), 1 deletion(-)
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create mode 100644 arch/arm/boot/dts/overlays/hifiberry-amp100-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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@@ -60,6 +60,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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hd44780-lcd.dtbo \
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hdmi-backlight-hwhack-gpio.dtbo \
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hifiberry-amp.dtbo \
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+ hifiberry-amp100.dtbo \
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hifiberry-dac.dtbo \
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hifiberry-dacplus.dtbo \
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hifiberry-dacplusadc.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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@@ -1045,8 +1045,36 @@ Load: dtoverlay=hifiberry-amp
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Params: <None>
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+Name: hifiberry-amp100
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+Info: Configures the HifiBerry AMP100 audio card
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+Load: dtoverlay=hifiberry-amp100,<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=hifiberry-amp100,24db_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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+ slave Force DAC+ Pro into slave mode, using Pi as
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+ master for bit clock and frame clock.
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+ leds_off If set to 'true' the onboard indicator LEDs
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+ are switched off at all times.
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+ auto_mute If set to 'true' the amplifier is automatically
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+ muted when the DAC is not playing.
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+ mute_ext_ctl The amplifier's HW mute control is enabled
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+ in ALSA mixer and set to <val>.
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+ Will be overwritten by ALSA user settings.
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+
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+
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Name: hifiberry-dac
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-Info: Configures the HifiBerry DAC audio card
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+Info: Configures the HifiBerry DAC audio cards
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Load: dtoverlay=hifiberry-dac
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Params: <None>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/hifiberry-amp100-overlay.dts
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@@ -0,0 +1,64 @@
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+// Definitions for HiFiBerry AMP100
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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,bcm2835";
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+
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+ fragment@0 {
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+ target-path = "/";
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+ __overlay__ {
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+ dacpro_osc: dacpro_osc {
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+ compatible = "hifiberry,dacpro-clk";
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+ #clock-cells = <0>;
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+ };
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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@4d {
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+ #sound-dai-cells = <0>;
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+ compatible = "ti,pcm5122";
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+ reg = <0x4d>;
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+ clocks = <&dacpro_osc>;
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+ AVDD-supply = <&vdd_3v3_reg>;
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+ DVDD-supply = <&vdd_3v3_reg>;
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+ CPVDD-supply = <&vdd_3v3_reg>;
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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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+ fragment@3 {
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+ target = <&sound>;
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+ hifiberry_dacplus: __overlay__ {
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+ compatible = "hifiberry,hifiberry-dacplus";
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+ i2s-controller = <&i2s>;
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+ status = "okay";
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+ mute-gpio = <&gpio 4 0>;
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+ reset-gpio = <&gpio 17 0x11>;
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+ };
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+ };
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+
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+ __overrides__ {
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+ 24db_digital_gain =
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+ <&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
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+ slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
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+ leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
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+ mute_ext_ctl = <&hifiberry_dacplus>,"hifiberry-dacplus,mute_ext_ctl:0";
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+ auto_mute = <&hifiberry_dacplus>,"hifiberry-dacplus,auto_mute?";
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+ };
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+};
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