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-rw-r--r--target/linux/bcm27xx/patches-5.10/950-0450-Adds-the-DT-overlays-to-support-Hifiberry-AMP100.patch132
1 files changed, 132 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.10/950-0450-Adds-the-DT-overlays-to-support-Hifiberry-AMP100.patch b/target/linux/bcm27xx/patches-5.10/950-0450-Adds-the-DT-overlays-to-support-Hifiberry-AMP100.patch
new file mode 100644
index 0000000000..1ddf1c9456
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.10/950-0450-Adds-the-DT-overlays-to-support-Hifiberry-AMP100.patch
@@ -0,0 +1,132 @@
+From bcaa1b9dcc731ff3d7a8d36769062e9571d0738c Mon Sep 17 00:00:00 2001
+From: Joerg Schambacher <joerg@i2audio.com>
+Date: Fri, 29 Jan 2021 08:26:44 +0100
+Subject: [PATCH] Adds the DT-overlays to support Hifiberry AMP100
+
+Adds new DT-overlay to control AMP100.
+
+Signed-off-by: Joerg Schambacher <joerg@hifiberry.com>
+---
+ arch/arm/boot/dts/overlays/Makefile | 1 +
+ arch/arm/boot/dts/overlays/README | 30 ++++++++-
+ .../dts/overlays/hifiberry-amp100-overlay.dts | 64 +++++++++++++++++++
+ 3 files changed, 94 insertions(+), 1 deletion(-)
+ create mode 100644 arch/arm/boot/dts/overlays/hifiberry-amp100-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -61,6 +61,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+ hd44780-lcd.dtbo \
+ hdmi-backlight-hwhack-gpio.dtbo \
+ hifiberry-amp.dtbo \
++ hifiberry-amp100.dtbo \
+ hifiberry-dac.dtbo \
+ hifiberry-dacplus.dtbo \
+ hifiberry-dacplusadc.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1059,8 +1059,36 @@ Load: dtoverlay=hifiberry-amp
+ Params: <None>
+
+
++Name: hifiberry-amp100
++Info: Configures the HifiBerry AMP100 audio card
++Load: dtoverlay=hifiberry-amp100,<param>=<val>
++Params: 24db_digital_gain Allow gain to be applied via the PCM512x codec
++ Digital volume control. Enable with
++ "dtoverlay=hifiberry-amp100,24db_digital_gain"
++ (The default behaviour is that the Digital
++ volume control is limited to a maximum of
++ 0dB. ie. it can attenuate but not provide
++ gain. For most users, this will be desired
++ as it will prevent clipping. By appending
++ the 24dB_digital_gain parameter, the Digital
++ volume control will allow up to 24dB of
++ gain. If this parameter is enabled, it is the
++ responsibility of the user to ensure that
++ the Digital volume control is set to a value
++ that does not result in clipping/distortion!)
++ slave Force DAC+ Pro into slave mode, using Pi as
++ master for bit clock and frame clock.
++ leds_off If set to 'true' the onboard indicator LEDs
++ are switched off at all times.
++ auto_mute If set to 'true' the amplifier is automatically
++ muted when the DAC is not playing.
++ mute_ext_ctl The amplifier's HW mute control is enabled
++ in ALSA mixer and set to <val>.
++ Will be overwritten by ALSA user settings.
++
++
+ Name: hifiberry-dac
+-Info: Configures the HifiBerry DAC audio card
++Info: Configures the HifiBerry DAC audio cards
+ Load: dtoverlay=hifiberry-dac
+ Params: <None>
+
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/hifiberry-amp100-overlay.dts
+@@ -0,0 +1,64 @@
++// Definitions for HiFiBerry AMP100
++/dts-v1/;
++/plugin/;
++
++/ {
++ compatible = "brcm,bcm2835";
++
++ fragment@0 {
++ target-path = "/";
++ __overlay__ {
++ dacpro_osc: dacpro_osc {
++ compatible = "hifiberry,dacpro-clk";
++ #clock-cells = <0>;
++ };
++ };
++ };
++
++ fragment@1 {
++ target = <&i2s>;
++ __overlay__ {
++ status = "okay";
++ };
++ };
++
++ fragment@2 {
++ target = <&i2c1>;
++ __overlay__ {
++ #address-cells = <1>;
++ #size-cells = <0>;
++ status = "okay";
++
++ pcm5122@4d {
++ #sound-dai-cells = <0>;
++ compatible = "ti,pcm5122";
++ reg = <0x4d>;
++ clocks = <&dacpro_osc>;
++ AVDD-supply = <&vdd_3v3_reg>;
++ DVDD-supply = <&vdd_3v3_reg>;
++ CPVDD-supply = <&vdd_3v3_reg>;
++ status = "okay";
++ };
++ };
++ };
++
++ fragment@3 {
++ target = <&sound>;
++ hifiberry_dacplus: __overlay__ {
++ compatible = "hifiberry,hifiberry-dacplus";
++ i2s-controller = <&i2s>;
++ status = "okay";
++ mute-gpio = <&gpio 4 0>;
++ reset-gpio = <&gpio 17 0x11>;
++ };
++ };
++
++ __overrides__ {
++ 24db_digital_gain =
++ <&hifiberry_dacplus>,"hifiberry,24db_digital_gain?";
++ slave = <&hifiberry_dacplus>,"hifiberry-dacplus,slave?";
++ leds_off = <&hifiberry_dacplus>,"hifiberry-dacplus,leds_off?";
++ mute_ext_ctl = <&hifiberry_dacplus>,"hifiberry-dacplus,mute_ext_ctl:0";
++ auto_mute = <&hifiberry_dacplus>,"hifiberry-dacplus,auto_mute?";
++ };
++};