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authorLaxman Dewangan <ldewangan@nvidia.com>2013-03-13 23:49:52 +0400
committerStephen Warren <swarren@nvidia.com>2013-04-05 03:17:41 +0400
commit0fb220967093c049b34adcc35adb3b4a65e884c8 (patch)
treee8e61a197794a6b4a31ebcfa2268672db1a3bb50 /arch/arm/boot/dts/tegra114.dtsi
parent3fc2f94eba35cc4735ec775d3c7b36deda71e2b1 (diff)
downloadlinux-0fb220967093c049b34adcc35adb3b4a65e884c8.tar.xz
ARM: tegra: add aliases and DMA requestor for serial nodes of Tegra114
Add APB DMA requestor and serial aliases for serial controller. There are two serial drivers i.e. 8250 based simple serial driver and APB DMA based serial driver for higher baudrate and performace. The simple serial driver is selected by compatible value "nvidia,tegra114-uart", "nvidia,tegra20-uart", and the APB DMA based driver is selected by compatible value "nvidia,tegra114-hsuart", "nvidia,tegra30-hsuart". Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Stephen Warren <swarren@nvidia.com>
Diffstat (limited to 'arch/arm/boot/dts/tegra114.dtsi')
-rw-r--r--arch/arm/boot/dts/tegra114.dtsi27
1 files changed, 23 insertions, 4 deletions
diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index 552e63972f14..352c2f32925e 100644
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -4,6 +4,13 @@
compatible = "nvidia,tegra114";
interrupt-parent = <&gic>;
+ aliases {
+ serial0 = &uarta;
+ serial1 = &uartb;
+ serial2 = &uartc;
+ serial3 = &uartd;
+ };
+
gic: interrupt-controller {
compatible = "arm,cortex-a15-gic";
#interrupt-cells = <3>;
@@ -99,38 +106,50 @@
0x70003000 0x40c>; /* 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,tegra114-uart", "nvidia,tegra20-uart" and to enable
+ * the APB DMA based serial driver, the comptible is
+ * "nvidia,tegra114-hsuart", "nvidia,tegra30-hsuart".
+ */
+ uarta: serial@70006000 {
compatible = "nvidia,tegra114-uart", "nvidia,tegra20-uart";
reg = <0x70006000 0x40>;
reg-shift = <2>;
interrupts = <0 36 0x04>;
+ nvidia,dma-request-selector = <&apbdma 8>;
status = "disabled";
clocks = <&tegra_car 6>;
};
- serial@70006040 {
+ uartb: serial@70006040 {
compatible = "nvidia,tegra114-uart", "nvidia,tegra20-uart";
reg = <0x70006040 0x40>;
reg-shift = <2>;
interrupts = <0 37 0x04>;
+ nvidia,dma-request-selector = <&apbdma 9>;
status = "disabled";
clocks = <&tegra_car 192>;
};
- serial@70006200 {
+ uartc: serial@70006200 {
compatible = "nvidia,tegra114-uart", "nvidia,tegra20-uart";
reg = <0x70006200 0x100>;
reg-shift = <2>;
interrupts = <0 46 0x04>;
+ nvidia,dma-request-selector = <&apbdma 10>;
status = "disabled";
clocks = <&tegra_car 55>;
};
- serial@70006300 {
+ uartd: serial@70006300 {
compatible = "nvidia,tegra114-uart", "nvidia,tegra20-uart";
reg = <0x70006300 0x100>;
reg-shift = <2>;
interrupts = <0 90 0x04>;
+ nvidia,dma-request-selector = <&apbdma 19>;
status = "disabled";
clocks = <&tegra_car 65>;
};