From b6551bb933f916f771d6fc5843719c2a3a3337a0 Mon Sep 17 00:00:00 2001
From: Laxman Dewangan <ldewangan@nvidia.com>
Date: Wed, 19 Dec 2012 12:01:11 +0530
Subject: [PATCH] ARM: tegra: dts: add aliases and DMA requestor for serial
 controller

Add APB DMA requestor and serial aliases for serial controller.
There will be two serial driver i.e. 8250 based simple serial driver
and APB DMA based serial driver for higher baudrate and performace.

The simple serial driver get enabled with compatible nvidia,tegra20-uart
and APB DMA based driver will get enabled with compatible
nvidia,tegra20-hsuart.

Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>
---
 arch/arm/boot/dts/tegra20.dtsi | 30 +++++++++++++++++++++++++-----
 arch/arm/boot/dts/tegra30.dtsi | 31 ++++++++++++++++++++++++++-----
 2 files changed, 51 insertions(+), 10 deletions(-)

diff --git a/arch/arm/boot/dts/tegra20.dtsi b/arch/arm/boot/dts/tegra20.dtsi
index 2e7c83c7253b..008f9f7f6925 100644
--- a/arch/arm/boot/dts/tegra20.dtsi
+++ b/arch/arm/boot/dts/tegra20.dtsi
@@ -4,6 +4,14 @@
 	compatible = "nvidia,tegra20";
 	interrupt-parent = <&intc>;
 
+	aliases {
+		serial0 = &uarta;
+		serial1 = &uartb;
+		serial2 = &uartc;
+		serial3 = &uartd;
+		serial4 = &uarte;
+	};
+
 	host1x {
 		compatible = "nvidia,tegra20-host1x", "simple-bus";
 		reg = <0x50000000 0x00024000>;
@@ -218,47 +226,59 @@
 		status = "disabled";
 	};
 
-	serial@70006000 {
+	/*
+	 * There are two serial driver i.e. 8250 based simple serial
+	 * driver and APB DMA based serial driver for higher baudrate
+	 * and performace. To enable the 8250 based driver, the compatible
+	 * is "nvidia,tegra20-uart" and to enable the APB DMA based serial
+	 * driver, the comptible is "nvidia,tegra20-hsuart".
+	 */
+	uarta: serial@70006000 {
 		compatible = "nvidia,tegra20-uart";
 		reg = <0x70006000 0x40>;
 		reg-shift = <2>;
 		interrupts = <0 36 0x04>;
+		nvidia,dma-request-selector = <&apbdma 8>;
 		clocks = <&tegra_car 6>;
 		status = "disabled";
 	};
 
-	serial@70006040 {
+	uartb: serial@70006040 {
 		compatible = "nvidia,tegra20-uart";
 		reg = <0x70006040 0x40>;
 		reg-shift = <2>;
 		interrupts = <0 37 0x04>;
+		nvidia,dma-request-selector = <&apbdma 9>;
 		clocks = <&tegra_car 96>;
 		status = "disabled";
 	};
 
-	serial@70006200 {
+	uartc: serial@70006200 {
 		compatible = "nvidia,tegra20-uart";
 		reg = <0x70006200 0x100>;
 		reg-shift = <2>;
 		interrupts = <0 46 0x04>;
+		nvidia,dma-request-selector = <&apbdma 10>;
 		clocks = <&tegra_car 55>;
 		status = "disabled";
 	};
 
-	serial@70006300 {
+	uartd: serial@70006300 {
 		compatible = "nvidia,tegra20-uart";
 		reg = <0x70006300 0x100>;
 		reg-shift = <2>;
 		interrupts = <0 90 0x04>;
+		nvidia,dma-request-selector = <&apbdma 19>;
 		clocks = <&tegra_car 65>;
 		status = "disabled";
 	};
 
-	serial@70006400 {
+	uarte: serial@70006400 {
 		compatible = "nvidia,tegra20-uart";
 		reg = <0x70006400 0x100>;
 		reg-shift = <2>;
 		interrupts = <0 91 0x04>;
+		nvidia,dma-request-selector = <&apbdma 20>;
 		clocks = <&tegra_car 66>;
 		status = "disabled";
 	};
diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi
index 7159bd353f8c..e55c99173704 100644
--- a/arch/arm/boot/dts/tegra30.dtsi
+++ b/arch/arm/boot/dts/tegra30.dtsi
@@ -4,6 +4,14 @@
 	compatible = "nvidia,tegra30";
 	interrupt-parent = <&intc>;
 
+	aliases {
+		serial0 = &uarta;
+		serial1 = &uartb;
+		serial2 = &uartc;
+		serial3 = &uartd;
+		serial4 = &uarte;
+	};
+
 	host1x {
 		compatible = "nvidia,tegra30-host1x", "simple-bus";
 		reg = <0x50000000 0x00024000>;
@@ -213,47 +221,60 @@
 		       0x70003000 0x3e4>; /* Mux registers */
 	};
 
-	serial@70006000 {
+	/*
+	 * There are two serial driver i.e. 8250 based simple serial
+	 * driver and APB DMA based serial driver for higher baudrate
+	 * and performace. To enable the 8250 based driver, the compatible
+	 * is "nvidia,tegra30-uart", "nvidia,tegra20-uart" and to enable
+	 * the APB DMA based serial driver, the comptible is
+	 * "nvidia,tegra30-hsuart", "nvidia,tegra20-hsuart".
+	 */
+	uarta: serial@70006000 {
 		compatible = "nvidia,tegra30-uart", "nvidia,tegra20-uart";
 		reg = <0x70006000 0x40>;
 		reg-shift = <2>;
 		interrupts = <0 36 0x04>;
+		nvidia,dma-request-selector = <&apbdma 8>;
 		clocks = <&tegra_car 6>;
 		status = "disabled";
 	};
 
-	serial@70006040 {
+	uartb: serial@70006040 {
 		compatible = "nvidia,tegra30-uart", "nvidia,tegra20-uart";
 		reg = <0x70006040 0x40>;
 		reg-shift = <2>;
 		interrupts = <0 37 0x04>;
+		nvidia,dma-request-selector = <&apbdma 9>;
 		clocks = <&tegra_car 160>;
 		status = "disabled";
 	};
 
-	serial@70006200 {
+	uartc: serial@70006200 {
 		compatible = "nvidia,tegra30-uart", "nvidia,tegra20-uart";
 		reg = <0x70006200 0x100>;
 		reg-shift = <2>;
 		interrupts = <0 46 0x04>;
+		nvidia,dma-request-selector = <&apbdma 10>;
 		clocks = <&tegra_car 55>;
 		status = "disabled";
 	};
 
-	serial@70006300 {
+	uartd: serial@70006300 {
 		compatible = "nvidia,tegra30-uart", "nvidia,tegra20-uart";
 		reg = <0x70006300 0x100>;
 		reg-shift = <2>;
 		interrupts = <0 90 0x04>;
+		nvidia,dma-request-selector = <&apbdma 19>;
 		clocks = <&tegra_car 65>;
 		status = "disabled";
 	};
 
-	serial@70006400 {
+	uarte: serial@70006400 {
 		compatible = "nvidia,tegra30-uart", "nvidia,tegra20-uart";
 		reg = <0x70006400 0x100>;
 		reg-shift = <2>;
 		interrupts = <0 91 0x04>;
+		nvidia,dma-request-selector = <&apbdma 20>;
 		clocks = <&tegra_car 66>;
 		status = "disabled";
 	};
-- 
2.20.1