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ARM: dts: gose: enable sound DMA support via DVC in device tree 

Enable DMA transfer using DVC in r8a7793/gose device tree.

     DMA               DMApp
[MEM] -> [SRC] -> [DVC] -> [SSIU] -> [SSI]

     DMA               DMApp
[MEM] <- [DVC] <- [SRC] <- [SSIU] <- [SSI]

Based on similar work for the r8a7791/koelsch by Kuninori Morimoto.

Cc: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
hifive-unleashed-5.1
Simon Horman 2015-12-02 16:59:44 +09:00
parent d2cde3b610
commit ae79f66db7
1 changed files with 19 additions and 2 deletions
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21
arch/arm/boot/dts/r8a7793-gose.dts
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@ -18,7 +18,24 @@
* This command is required when Playback/Capture
*
* amixer set "LINEOUT Mixer DACL" on
* amixer set "DVC Out" 100%
* amixer set "DVC In" 100%
*
* You can use Mute
*
* amixer set "DVC Out Mute" on
* amixer set "DVC In Mute" on
*
* You can use Volume Ramp
*
* amixer set "DVC Out Ramp Up Rate" "0.125 dB/64 steps"
* amixer set "DVC Out Ramp Down Rate" "0.125 dB/512 steps"
* amixer set "DVC Out Ramp" on
* aplay xxx.wav &
* amixer set "DVC Out" 80% // Volume Down
* amixer set "DVC Out" 100% // Volume Up
*/
/dts-v1/;
#include "r8a7793.dtsi"
#include <dt-bindings/gpio/gpio.h>
@ -401,8 +418,8 @@
rcar_sound,dai {
dai0 {
playback = <&ssi0 &src2>;
capture = <&ssi1 &src3>;
playback = <&ssi0 &src2 &dvc0>;
capture = <&ssi1 &src3 &dvc1>;
};
};
};