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Commit 94bbdd77 authored by Alexander Kochetkov's avatar Alexander Kochetkov Committed by Heiko Stuebner
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ARM: dts: rockchip: setup DMA-channels for mmc0 and emmc for rk3188 



This commit enable DMA-based transfers for SD/eMMC card adapters
and reduce number of interrupts produced by SD-card/eMMC-card
adapters.

Sometimes interrupts from SD-card/eMMC-card adapters running in
PIO mode blocks execution of hrtimers and I2S DMA callbacks for
a long periods (100 ms or more).

Signed-off-by: default avatarAlexander Kochetkov <al.kochet@gmail.com>
[moved dma properties to rk3xxx.dtsi and added sdio dma]
Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
parent 2e1aa605

arch/arm/boot/dts/rk3xxx.dtsi

+6 −0
Original line number Diff line number Diff line
@@ -223,6 +223,8 @@ 
		interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&cru HCLK_SDMMC>, <&cru SCLK_SDMMC>;

		clock-names = "biu", "ciu";

		dmas = <&dmac2 1>;

		dma-names = "rx-tx";

		fifo-depth = <256>;

		resets = <&cru SRST_SDMMC>;

		reset-names = "reset";
@@ -235,6 +237,8 @@ 
		interrupts = <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&cru HCLK_SDIO>, <&cru SCLK_SDIO>;

		clock-names = "biu", "ciu";

		dmas = <&dmac2 3>;

		dma-names = "rx-tx";

		fifo-depth = <256>;

		resets = <&cru SRST_SDIO>;

		reset-names = "reset";
@@ -247,6 +251,8 @@ 
		interrupts = <GIC_SPI 25 IRQ_TYPE_LEVEL_HIGH>;

		clocks = <&cru HCLK_EMMC>, <&cru SCLK_EMMC>;

		clock-names = "biu", "ciu";

		dmas = <&dmac2 4>;

		dma-names = "rx-tx";

		fifo-depth = <256>;

		resets = <&cru SRST_EMMC>;

		reset-names = "reset";