Re: [PATCH v8 6/7] arm64: dts: add dts nodes for MT6779

On Tue, 2020-07-14 at 20:14 +0200, Matthias Brugger wrote:

On 14/07/2020 11:20, Hanks Chen wrote:

quoted

this adds initial MT6779 dts settings for board support,
including cpu, gic, timer, ccf, pinctrl, uart, sysirq...etc.

Signed-off-by: Hanks Chen <redacted>
---
  arch/arm64/boot/dts/mediatek/Makefile       |   1 +
  arch/arm64/boot/dts/mediatek/mt6779-evb.dts |  31 +++
  arch/arm64/boot/dts/mediatek/mt6779.dtsi    | 271 ++++++++++++++++++++
  3 files changed, 303 insertions(+)
  create mode 100644 arch/arm64/boot/dts/mediatek/mt6779-evb.dts
  create mode 100644 arch/arm64/boot/dts/mediatek/mt6779.dtsi

[...]

quoted

+
+		uart0: serial@11002000 {
+			compatible = "mediatek,mt6779-uart",
+				     "mediatek,mt6577-uart";
+			reg = <0 0x11002000 0 0x400>;
+			interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&clk26m>, <&infracfg_ao CLK_INFRA_UART0>;
+			clock-names = "baud", "bus";
+			status = "disabled";
+		};
+
+		uart1: serial@11003000 {
+			compatible = "mediatek,mt6779-uart",
+				     "mediatek,mt6577-uart";
+			reg = <0 0x11003000 0 0x400>;
+			interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&clk26m>, <&infracfg_ao CLK_INFRA_UART1>;
+			clock-names = "baud", "bus";
+			status = "disabled";
+		};
+
+		uart2: serial@11004000 {
+			compatible = "mediatek,mt6779-uart",
+				     "mediatek,mt6577-uart";
+			reg = <0 0x11004000 0 0x400>;
+			interrupts = <GIC_SPI 117 IRQ_TYPE_LEVEL_LOW>;
+			clocks = <&clk26m>, <&infracfg_ao CLK_INFRA_UART2>;
+			clock-names = "baud", "bus";
+			status = "disabled";
+		};

Devicetree describes the HW we have. As far as I know, we have 4 UARTs on 
MT6779. So we should list them all here.

Actually, We have only 3 UARTs HW on MT6779, but have 4 UART clk in
header file of clk.
CLK_INFRA_UART3 is a dummy clk interface, it has no effect on the
operation of the read/write instruction.

If you think it is not good, I can remove it in the header file of clk.

Thanks

Regards,
Matthias

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