[PATCH 4/4] arm: dts: mt2701: add uart APDMA to device tree

Long Cheng
2017-02-16T11:07:31Z

1. add uart APDMA controller device node
2. add uart 0/1/2/3 DMA function
3. uart0 is console, So disable DMA
4. enable uart2 port to test DMA function.

Signed-off-by: Long Cheng <long.cheng-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org>
---
arch/arm/boot/dts/mt2701-evb.dts | 22 ++++++++++++++++++++++
arch/arm/boot/dts/mt2701.dtsi | 29 +++++++++++++++++++++++++++++
2 files changed, 51 insertions(+)

diff --git a/arch/arm/boot/dts/mt2701-evb.dts b/arch/arm/boot/dts/mt2701-evb.dts
index 082ca88..2f92bf9 100644
--- a/arch/arm/boot/dts/mt2701-evb.dts
+++ b/arch/arm/boot/dts/mt2701-evb.dts
@@ -24,6 +24,28 @@
};
};

+&pio {
+ uart2_default_cfg: uart2default {
+ pins_cmd_dat {
+ pinmux = <MT2701_PIN_14_URXD2__FUNC_URXD2>,
+ <MT2701_PIN_15_UTXD2__FUNC_UTXD2>,
+ <MT2701_PIN_242_URTS2__FUNC_URTS2>,
+ <MT2701_PIN_243_UCTS2__FUNC_UCTS2>;
+ bias-pull-up;
+ };
+ };
+};
+
&uart0 {
+ dmas = "";
+ dma-names = "";
+
+ status = "okay";
+};
+
+&uart2 {
+ pinctrl-names = "default";
+ pinctrl-0 = <&uart2_default_cfg>;
+
status = "okay";
};
diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
index 7eab6f4..62b3ec9 100644
--- a/arch/arm/boot/dts/mt2701.dtsi
+++ b/arch/arm/boot/dts/mt2701.dtsi
@@ -175,6 +175,23 @@
<0 0x10216000 0 0x2000>;
};

+ apdma: dma-controller@11000380 {
+ compatible = "mediatek,mt2701-uart-dma",
+ "mediatek,mt6577-uart-dma";
+ reg = <0 0x11000380 0 0x400>;
+ interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 64 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 65 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 66 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 67 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 68 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 69 IRQ_TYPE_LEVEL_LOW>,
+ <GIC_SPI 70 IRQ_TYPE_LEVEL_LOW>;
+ clocks = <&pericfg CLK_PERI_AP_DMA>;
+ clock-names = "apdma";
+ #dma-cells = <1>;
+ };
+
uart0: serial@11002000 {
compatible = "mediatek,mt2701-uart",
"mediatek,mt6577-uart";
@@ -182,6 +199,9 @@
interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART0_SEL>, <&pericfg CLK_PERI_UART0>;
clock-names = "baud", "bus";
+ dmas = <&apdma 0
+ &apdma 1>;
+ dma-names = "tx", "rx";
status = "disabled";
};

@@ -192,6 +212,9 @@
interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART1_SEL>, <&pericfg CLK_PERI_UART1>;
clock-names = "baud", "bus";
+ dmas = <&apdma 2
+ &apdma 3>;
+ dma-names = "tx", "rx";
status = "disabled";
};

@@ -202,6 +225,9 @@
interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART2_SEL>, <&pericfg CLK_PERI_UART2>;
clock-names = "baud", "bus";
+ dmas = <&apdma 4
+ &apdma 5>;
+ dma-names = "tx", "rx";
status = "disabled";
};

@@ -212,6 +238,9 @@
interrupts = <GIC_SPI 54 IRQ_TYPE_LEVEL_LOW>;
clocks = <&pericfg CLK_PERI_UART3_SEL>, <&pericfg CLK_PERI_UART3>;
clock-names = "baud", "bus";
+ dmas = <&apdma 6
+ &apdma 7>;
+ dma-names = "tx", "rx";
status = "disabled";
};
};
--
1.7.9.5