This adds the definitions for the BCM2835 I2S driver
to the device tree. Some GPIO settings are needed for
the correct pin functions.
Signed-off-by: Florian Meier <florian.meier@xxxxxxxx>
---
arch/arm/boot/dts/bcm2835-rpi-b.dts | 12 +++++++++++-
arch/arm/boot/dts/bcm2835.dtsi | 10 ++++++++++
2 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/arch/arm/boot/dts/bcm2835-rpi-b.dts
b/arch/arm/boot/dts/bcm2835-rpi-b.dts
index 2a3b1c1..e83ed2f 100644
--- a/arch/arm/boot/dts/bcm2835-rpi-b.dts
+++ b/arch/arm/boot/dts/bcm2835-rpi-b.dts
@@ -23,7 +23,7 @@
&gpio {
pinctrl-names = "default";
- pinctrl-0 = <&gpioout &alt0 &alt3>;
+ pinctrl-0 = <&gpioout &alt0 &alt2 &alt3>;
gpioout: gpioout {
brcm,pins = <6>;
@@ -39,6 +39,16 @@
brcm,pins = <48 49 50 51 52 53>;
brcm,function = <7>; /* alt3 */
};
+
+ /* I2S interface */
+ alt2: alt2 {
+ brcm,pins = <28 29 30 31>;
+ brcm,function = <6>; /* alt2 */
+ };
+};
+
+&bcm2835_i2s {
+ status = "okay";
};
&i2c0 {
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index 1da6b36..ca2259c 100644
--- a/arch/arm/boot/dts/bcm2835.dtsi
+++ b/arch/arm/boot/dts/bcm2835.dtsi
@@ -134,6 +134,16 @@
#dma-cells = <1>;
brcm,dma-channel-mask = <0x7f35>;
};
+
+ bcm2835_i2s: i2s@7e203000 {
+ compatible = "brcm,bcm2835-i2s";
+ reg = <0x7e203000 0x20>,
+ <0x7e101098 0x02>;
+
+ dmas = <&dma 2>,
+ <&dma 3>;
+ dma-names = "tx", "rx";
+ };
};
clocks {
--
1.8.3.2
--
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