linux-kernel - [PATCH] ARC: [axs10x] enable DW DMA controller

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Date:	Fri,  4 Dec 2015 22:22:06 +0300
From:	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
To:	linux-snps-arc@...ts.infradead.org
Cc:	linux-kernel@...r.kernel.org,
	Nelson Pereira <Nelson.Pereira@...opsys.com>,
	Vineet Gupta <Vineet.Gupta1@...opsys.com>,
	Alexey Brodkin <Alexey.Brodkin@...opsys.com>
Subject: [PATCH] ARC: [axs10x] enable DW DMA controller

From: Nelson Pereira <npereira@...opsys.com>

ARC SDP baseboard among other peripherals sports
DesignWare DMA controller.

This enables support of that device.
Note typically DW DMA controller is used with external devices
connected to ARC SDP board via HAPS Extension bus.

Signed-off-by: Nelson Pereira <npereira@...opsys.com>
Cc: Vineet Gupta <vgupta@...opsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@...opsys.com>
---
 arch/arc/boot/dts/axs10x_mb.dtsi      | 16 ++++++++++++++++
 arch/arc/configs/axs101_defconfig     |  5 +++++
 arch/arc/configs/axs103_defconfig     |  5 +++++
 arch/arc/configs/axs103_smp_defconfig |  5 +++++
 4 files changed, 31 insertions(+)

diff --git a/arch/arc/boot/dts/axs10x_mb.dtsi b/arch/arc/boot/dts/axs10x_mb.dtsi
index f3db321..1e57580 100644
--- a/arch/arc/boot/dts/axs10x_mb.dtsi
+++ b/arch/arc/boot/dts/axs10x_mb.dtsi
@@ -220,5 +220,21 @@
 				reg = <2>;
 			};
 		};
+
+		dmac: dmac@...0000 {
+			compatible = "snps,dma-spear1340";
+			reg = <0x80000 0x1000>;
+			interrupts = <9>;
+			dma-channels = <4>;
+			dma-requests = <16>;
+			dma-masters = <2>;
+			#dma-cells = <3>;
+			chan_allocation_order = <1>;
+			chan_priority = <1>;
+			block_size = <0xfff>;
+			data_width = <3 3>;
+			clocks = <&apbclk>;
+			clock-names = "hclk";
+		};
 	};
 };
diff --git a/arch/arc/configs/axs101_defconfig b/arch/arc/configs/axs101_defconfig
index 562dac6..405474f 100644
--- a/arch/arc/configs/axs101_defconfig
+++ b/arch/arc/configs/axs101_defconfig
@@ -90,6 +90,11 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_IDMAC=y
+CONFIG_DMADEVICES=y
+CONFIG_DW_DMAC_CORE=y
+CONFIG_DW_DMAC=y
+CONFIG_DMA_ENGINE=y
+CONFIG_DMA_OF=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXT3_FS=y
 CONFIG_EXT4_FS=y
diff --git a/arch/arc/configs/axs103_defconfig b/arch/arc/configs/axs103_defconfig
index 83a6d8d..570f06f 100644
--- a/arch/arc/configs/axs103_defconfig
+++ b/arch/arc/configs/axs103_defconfig
@@ -96,6 +96,11 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_IDMAC=y
+CONFIG_DMADEVICES=y
+CONFIG_DW_DMAC_CORE=y
+CONFIG_DW_DMAC=y
+CONFIG_DMA_ENGINE=y
+CONFIG_DMA_OF=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXT3_FS=y
 CONFIG_EXT4_FS=y
diff --git a/arch/arc/configs/axs103_smp_defconfig b/arch/arc/configs/axs103_smp_defconfig
index f1e1c84..16cfce8 100644
--- a/arch/arc/configs/axs103_smp_defconfig
+++ b/arch/arc/configs/axs103_smp_defconfig
@@ -97,6 +97,11 @@ CONFIG_MMC_SDHCI=y
 CONFIG_MMC_SDHCI_PLTFM=y
 CONFIG_MMC_DW=y
 CONFIG_MMC_DW_IDMAC=y
+CONFIG_DMADEVICES=y
+CONFIG_DW_DMAC_CORE=y
+CONFIG_DW_DMAC=y
+CONFIG_DMA_ENGINE=y
+CONFIG_DMA_OF=y
 # CONFIG_IOMMU_SUPPORT is not set
 CONFIG_EXT3_FS=y
 CONFIG_EXT4_FS=y
-- 
2.4.3

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