[PATCH 0/2] ARM: mediatek: Enable uart for mt6589

[PATCH 0/2] ARM: mediatek: Enable uart for mt6589

[Matthias Brugger]

This patch series adds uart ports for the mt6589 SoC from Mediatek.
It also enables the uart port for the mt6589 based Aquaris5 mobile phone.

This series is based on 3.19-rc1 and assumes that sysirq patch from Yingjoe Chen is added to the SoC [0].

[0] https://lkml.org/lkml/2014/11/25/132

Matthias Brugger (2):
  ARM: mediatek: dts: Add uart to mt6589
  ARM: mediatek: dts: Add uart to Aquaris5

 arch/arm/boot/dts/mt6589-aquaris5.dts |  8 +++++++-
 arch/arm/boot/dts/mt6589.dtsi         | 38 +++++++++++++++++++++++++++++++++++
 2 files changed, 45 insertions(+), 1 deletion(-)

-- 
1.9.1

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[PATCH 1/2] ARM: mediatek: dts: Add uart to mt6589

[Matthias Brugger]

This patch adds the uart ports to the device tree of Mediatek mt6589 SoC.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 arch/arm/boot/dts/mt6589.dtsi | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/arch/arm/boot/dts/mt6589.dtsi b/arch/arm/boot/dts/mt6589.dtsi
index c91b2a9..106b61b 100644
--- a/arch/arm/boot/dts/mt6589.dtsi
+++ b/arch/arm/boot/dts/mt6589.dtsi
@@ -65,6 +65,12 @@
 			clock-frequency = <32000>;
 			#clock-cells = <0>;
 		};
+
+		uart_clk: dummy26m {
+			compatible = "fixed-clock";
+			clock-frequency = <26000000>;
+			#clock-cells = <0>;
+		};
 	};
 
 	soc {
@@ -100,5 +106,37 @@
 			      <0x10214000 0x2000>,
 			      <0x10216000 0x2000>;
 		};
+
+		uart0: serial@11006000 {
+			compatible = "mediatek,mt6577-uart";
+			reg = <0x11006000 0x400>;
+			interrupts = <GIC_SPI 51 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&uart_clk>;
+			status = "disabled";
+		};
+
+		uart1: serial@11007000 {
+			compatible = "mediatek,mt6577-uart";
+			reg = <0x11007000 0x400>;
+			interrupts = <GIC_SPI 52 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&uart_clk>;
+			status = "disabled";
+		};
+
+		uart2: serial@11008000 {
+			compatible = "mediatek,mt6577-uart";
+			reg = <0x11008000 0x400>;
+			interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&uart_clk>;
+			status = "disabled";
+		};
+
+		uart3: serial@11009000 {
+			compatible = "mediatek,mt6577-uart";
+			reg = <0x11009000 0x400>;
+			interrupts = <GIC_SPI 54 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&uart_clk>;
+			status = "disabled";
+		};
 	};
 };
-- 
1.9.1

[PATCH 2/2] ARM: mediatek: dts: Add uart to Aquaris5

[Matthias Brugger]

This patch enables uart port for the Aquaris5 mobile phone.

Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
---
 arch/arm/boot/dts/mt6589-aquaris5.dts | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/mt6589-aquaris5.dts b/arch/arm/boot/dts/mt6589-aquaris5.dts
index 0da0470..d5cbfda 100644
--- a/arch/arm/boot/dts/mt6589-aquaris5.dts
+++ b/arch/arm/boot/dts/mt6589-aquaris5.dts
@@ -21,10 +21,16 @@
 	compatible = "mundoreader,bq-aquaris5", "mediatek,mt6589";
 
 	chosen {
-		bootargs = "earlyprintk";
+		bootargs = "console=ttyS0,921600n8 earlyprintk";
 	};
 
 	memory {
 		reg = <0x80000000 0x40000000>;
 	};
+
+	soc {
+		uart0: serial@11006000 {
+			status = "okay";
+		};
+	};
 };
-- 
1.9.1

Re: [PATCH 2/2] ARM: mediatek: dts: Add uart to Aquaris5

[Sascha Hauer]

Hi Matthias,

On Fri, Jan 02, 2015 at 07:48:05PM +0100, Matthias Brugger wrote:
> This patch enables uart port for the Aquaris5 mobile phone.
> 
> Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
> ---
>  arch/arm/boot/dts/mt6589-aquaris5.dts | 8 +++++++-
>  1 file changed, 7 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/boot/dts/mt6589-aquaris5.dts b/arch/arm/boot/dts/mt6589-aquaris5.dts
> index 0da0470..d5cbfda 100644
> --- a/arch/arm/boot/dts/mt6589-aquaris5.dts
> +++ b/arch/arm/boot/dts/mt6589-aquaris5.dts
> @@ -21,10 +21,16 @@
>  	compatible = "mundoreader,bq-aquaris5", "mediatek,mt6589";
>  
>  	chosen {
> -		bootargs = "earlyprintk";
> +		bootargs = "console=ttyS0,921600n8 earlyprintk";
>  	};

		stdout-path = &uart0;

Should work aswell and makes you independent from the way the kernel
decides to number the UARTs.

>  
>  	memory {
>  		reg = <0x80000000 0x40000000>;
>  	};
> +
> +	soc {
> +		uart0: serial@11006000 {
> +			status = "okay";
> +		};
> +	};

By using the & notation you don't have to resemble the tree structure in
the board file, like this:

&uart0 {
	status = "okay";
};

See for example the omap, i.MX or other dts files.

Sascha

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