From 94bbdd77247d8c16eed5f55dddcf1cbc38d06cc4 Mon Sep 17 00:00:00 2001 From: Alexander Kochetkov Date: Tue, 21 Mar 2017 18:13:47 +0300 Subject: [PATCH] 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: Alexander Kochetkov [moved dma properties to rk3xxx.dtsi and added sdio dma] Signed-off-by: Heiko Stuebner --- arch/arm/boot/dts/rk3xxx.dtsi | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/arch/arm/boot/dts/rk3xxx.dtsi b/arch/arm/boot/dts/rk3xxx.dtsi index c5b8592af73c..4aa6f60d6a22 100644 --- a/arch/arm/boot/dts/rk3xxx.dtsi +++ b/arch/arm/boot/dts/rk3xxx.dtsi @@ -223,6 +223,8 @@ mmc0: dwmmc@10214000 { interrupts = ; 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 @@ mmc1: dwmmc@10218000 { interrupts = ; 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 @@ emmc: dwmmc@1021c000 { interrupts = ; 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"; -- 2.45.2