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7d7aa2fd92
This change makes the names of Broadcom targets consistent by using the common notation based on SoC/CPU ID (which is used internally anyway), bcmXXXX instead of brcmXXXX. This is even used for target TITLE in make menuconfig already, only the short target name used brcm so far. Despite, since subtargets range from bcm2708 to bcm2711, it seems appropriate to use bcm27xx instead of bcm2708 (again, as already done for BOARDNAME). This also renames the packages brcm2708-userland and brcm2708-gpu-fw. Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de> Acked-by: Álvaro Fernández Rojas <noltari@gmail.com>
131 lines
3.5 KiB
Diff
131 lines
3.5 KiB
Diff
From 5962d99b5efed4297ed5c1807d21b406ab86aef1 Mon Sep 17 00:00:00 2001
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From: wavelet2 <20504977+wavelet2@users.noreply.github.com>
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Date: Mon, 15 Apr 2019 10:00:20 +0100
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Subject: [PATCH] Maxim MAX98357A I2S DAC overlay (#2935)
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Add overlay for Maxim MAX98357A I2S DAC.
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Signed-off-by: Richard Steedman <richard.steedman@gmail.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 | 9 ++
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.../boot/dts/overlays/max98357a-overlay.dts | 84 +++++++++++++++++++
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3 files changed, 94 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/max98357a-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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@@ -75,6 +75,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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justboom-dac.dtbo \
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justboom-digi.dtbo \
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ltc294x.dtbo \
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+ max98357a.dtbo \
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mbed-dac.dtbo \
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mcp23017.dtbo \
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mcp23s17.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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@@ -1276,6 +1276,15 @@ Params: ltc2941 Select t
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See the datasheet for more information.
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+Name: max98357a
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+Info: Configures the Maxim MAX98357A I2S DAC
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+Load: dtoverlay=max98357a,<param>=<val>
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+Params: no-sdmode Driver does not manage the state of the DAC's
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+ SD_MODE pin (i.e. chip is always on).
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+ sdmode-pin integer, GPIO pin connected to the SD_MODE input
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+ of the DAC (default GPIO4 if parameter omitted).
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+
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+
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Name: mbed-dac
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Info: Configures the mbed AudioCODEC (TLV320AIC23B)
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Load: dtoverlay=mbed-dac
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/max98357a-overlay.dts
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@@ -0,0 +1,84 @@
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+// Overlay for Maxim MAX98357A audio DAC
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+
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+// dtparams:
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+// no-sdmode - SD_MODE pin not managed by driver.
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+// sdmode-pin - Specify GPIO pin to which SD_MODE is connected (default 4).
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+
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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", "brcm,bcm2708", "brcm,bcm2709";
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+
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+ /* Enable I2S */
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+ fragment@0 {
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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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+ /* DAC whose SD_MODE pin is managed by driver (via GPIO pin) */
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+ fragment@1 {
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+ target-path = "/";
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+ __overlay__ {
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+ max98357a_dac: max98357a {
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+ compatible = "maxim,max98357a";
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+ #sound-dai-cells = <0>;
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+ sdmode-gpios = <&gpio 4 0>; /* 2nd word overwritten by sdmode-pin parameter */
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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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+ /* DAC whose SD_MODE pin is not managed by driver */
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+ fragment@2 {
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+ target-path = "/";
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+ __dormant__ {
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+ max98357a_nsd: max98357a {
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+ compatible = "maxim,max98357a";
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+ #sound-dai-cells = <0>;
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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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+ /* Soundcard connecting I2S to DAC with SD_MODE */
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+ fragment@3 {
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+ target = <&sound>;
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+ __overlay__ {
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+ compatible = "simple-audio-card";
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+ simple-audio-card,format = "i2s";
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+ simple-audio-card,name = "MAX98357A";
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+ status = "okay";
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+ simple-audio-card,cpu {
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+ sound-dai = <&i2s>;
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+ };
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+ simple-audio-card,codec {
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+ sound-dai = <&max98357a_dac>;
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+ };
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+ };
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+ };
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+
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+ /* Soundcard connecting I2S to DAC without SD_MODE */
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+ fragment@4 {
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+ target = <&sound>;
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+ __dormant__ {
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+ compatible = "simple-audio-card";
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+ simple-audio-card,format = "i2s";
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+ simple-audio-card,name = "MAX98357A";
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+ status = "okay";
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+ simple-audio-card,cpu {
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+ sound-dai = <&i2s>;
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+ };
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+ simple-audio-card,codec {
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+ sound-dai = <&max98357a_nsd>;
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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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+ no-sdmode = <0>,"-1+2-3+4";
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+ sdmode-pin = <&max98357a_dac>,"sdmode-gpios:4";
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+ };
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+};
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