brcm2708: organize kernel patches

[openwrt/openwrt.git] / target / linux / brcm2708 / patches-4.19 / 950-0384-Maxim-MAX98357A-I2S-DAC-overlay-2935.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0384-Maxim-MAX98357A-I2S-DAC-overlay-2935.patch b/target/linux/brcm2708/patches-4.19/950-0384-Maxim-MAX98357A-I2S-DAC-overlay-2935.patch
new file mode 100644 (file)
index 0000000..e149912
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0384-Maxim-MAX98357A-I2S-DAC-overlay-2935.patch
@@ -0,0 +1,130 @@
+From 5962d99b5efed4297ed5c1807d21b406ab86aef1 Mon Sep 17 00:00:00 2001
+From: wavelet2 <20504977+wavelet2@users.noreply.github.com>
+Date: Mon, 15 Apr 2019 10:00:20 +0100
+Subject: [PATCH] Maxim MAX98357A I2S DAC overlay (#2935)
+
+Add overlay for Maxim MAX98357A I2S DAC.
+
+Signed-off-by: Richard Steedman <richard.steedman@gmail.com>
+---
+ arch/arm/boot/dts/overlays/Makefile           |  1 +
+ arch/arm/boot/dts/overlays/README             |  9 ++
+ .../boot/dts/overlays/max98357a-overlay.dts   | 84 +++++++++++++++++++
+ 3 files changed, 94 insertions(+)
+ create mode 100644 arch/arm/boot/dts/overlays/max98357a-overlay.dts
+
+--- a/arch/arm/boot/dts/overlays/Makefile
++++ b/arch/arm/boot/dts/overlays/Makefile
+@@ -75,6 +75,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
+       justboom-dac.dtbo \
+       justboom-digi.dtbo \
+       ltc294x.dtbo \
++      max98357a.dtbo \
+       mbed-dac.dtbo \
+       mcp23017.dtbo \
+       mcp23s17.dtbo \
+--- a/arch/arm/boot/dts/overlays/README
++++ b/arch/arm/boot/dts/overlays/README
+@@ -1276,6 +1276,15 @@ Params: ltc2941                 Select t
+                                 See the datasheet for more information.
+ 
+ 
++Name:   max98357a
++Info:   Configures the Maxim MAX98357A I2S DAC
++Load:   dtoverlay=max98357a,<param>=<val>
++Params: no-sdmode               Driver does not manage the state of the DAC's
++                                SD_MODE pin (i.e. chip is always on).
++        sdmode-pin              integer, GPIO pin connected to the SD_MODE input
++                                of the DAC (default GPIO4 if parameter omitted).
++
++
+ Name:   mbed-dac
+ Info:   Configures the mbed AudioCODEC (TLV320AIC23B)
+ Load:   dtoverlay=mbed-dac
+--- /dev/null
++++ b/arch/arm/boot/dts/overlays/max98357a-overlay.dts
+@@ -0,0 +1,84 @@
++// Overlay for Maxim MAX98357A audio DAC
++
++// dtparams:
++//     no-sdmode  - SD_MODE pin not managed by driver.
++//     sdmode-pin - Specify GPIO pin to which SD_MODE is connected (default 4).
++
++/dts-v1/;
++/plugin/;
++
++/ {
++      compatible = "brcm,bcm2835", "brcm,bcm2708", "brcm,bcm2709";
++
++      /* Enable I2S */
++      fragment@0 {
++              target = <&i2s>;
++              __overlay__ {
++                      status = "okay";
++              };
++      };
++
++      /* DAC whose SD_MODE pin is managed by driver (via GPIO pin) */
++      fragment@1 {
++              target-path = "/";
++              __overlay__ {
++                      max98357a_dac: max98357a {
++                              compatible = "maxim,max98357a";
++                              #sound-dai-cells = <0>;
++                              sdmode-gpios = <&gpio 4 0>;   /* 2nd word overwritten by sdmode-pin parameter */
++                              status = "okay";
++                      };
++              };
++      };
++
++      /* DAC whose SD_MODE pin is not managed by driver */
++      fragment@2 {
++              target-path = "/";
++              __dormant__ {
++                      max98357a_nsd: max98357a {
++                              compatible = "maxim,max98357a";
++                              #sound-dai-cells = <0>;
++                              status = "okay";
++                      };
++              };
++      };
++
++      /* Soundcard connecting I2S to DAC with SD_MODE */
++      fragment@3 {
++              target = <&sound>;
++              __overlay__ {
++                      compatible = "simple-audio-card";
++                      simple-audio-card,format = "i2s";
++                      simple-audio-card,name = "MAX98357A";
++                      status = "okay";
++                      simple-audio-card,cpu {
++                              sound-dai = <&i2s>;
++                      };
++                      simple-audio-card,codec {
++                              sound-dai = <&max98357a_dac>;
++                      };
++              };
++      };
++
++      /* Soundcard connecting I2S to DAC without SD_MODE */
++      fragment@4 {
++              target = <&sound>;
++              __dormant__ {
++                      compatible = "simple-audio-card";
++                      simple-audio-card,format = "i2s";
++                      simple-audio-card,name = "MAX98357A";
++                      status = "okay";
++                      simple-audio-card,cpu {
++                              sound-dai = <&i2s>;
++                      };
++                      simple-audio-card,codec {
++                              sound-dai = <&max98357a_nsd>;
++                      };
++              };
++      };
++
++      __overrides__ {
++              no-sdmode  = <0>,"-1+2-3+4";
++              sdmode-pin = <&max98357a_dac>,"sdmode-gpios:4";
++      };
++};