[PATCH v3 2/2] arm64: dts: Add Mediatek SoC MT2712 and evaluation board dts and Makefile
From: YT Shen <hidden>
Date: 2017-06-21 11:01:15
Also in:
linux-devicetree, linux-mediatek, linux-serial, lkml
On Fri, 2017-06-16 at 16:33 +0200, Matthias Brugger wrote:
On 16/06/17 15:45, YT Shen wrote:quoted
This adds basic chip support for Mediatek 2712 Signed-off-by: YT Shen <redacted> --- arch/arm64/boot/dts/mediatek/Makefile | 1 + arch/arm64/boot/dts/mediatek/mt2712-evb.dts | 32 ++++++ arch/arm64/boot/dts/mediatek/mt2712e.dtsi | 166 ++++++++++++++++++++++++++++ 3 files changed, 199 insertions(+) create mode 100644 arch/arm64/boot/dts/mediatek/mt2712-evb.dts create mode 100644 arch/arm64/boot/dts/mediatek/mt2712e.dtsidiff --git a/arch/arm64/boot/dts/mediatek/Makefile b/arch/arm64/boot/dts/mediatek/Makefile index 9fbfd32..fcc0604 100644 --- a/arch/arm64/boot/dts/mediatek/Makefile +++ b/arch/arm64/boot/dts/mediatek/Makefile@@ -1,3 +1,4 @@ +dtb-$(CONFIG_ARCH_MEDIATEK) += mt2712-evb.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt6755-evb.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt6795-evb.dtb dtb-$(CONFIG_ARCH_MEDIATEK) += mt8173-evb.dtbdiff --git a/arch/arm64/boot/dts/mediatek/mt2712-evb.dts b/arch/arm64/boot/dts/mediatek/mt2712-evb.dts new file mode 100644 index 0000000..8c804df --- /dev/null +++ b/arch/arm64/boot/dts/mediatek/mt2712-evb.dts@@ -0,0 +1,32 @@ +/* + * Copyright (c) 2017 MediaTek Inc. + * Author: YT Shen <yt.shen@mediatek.com> + * + * SPDX-License-Identifier: (GPL-2.0 OR MIT) + */ + +/dts-v1/; +#include "mt2712e.dtsi" + +/ { + model = "MediaTek MT2712 evaluation board"; + compatible = "mediatek,mt2712-evb", "mediatek,mt2712"; + + aliases { + serial0 = &uart0; + }; + + memory at 40000000 { + device_type = "memory"; + reg = <0 0x40000000 0 0x80000000>; + }; + + chosen { + stdout-path = "serial0:921600n8"; + }; +}; + +&uart0 { + status = "okay"; +}; +diff --git a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi new file mode 100644 index 0000000..65cdd4a --- /dev/null +++ b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi@@ -0,0 +1,166 @@[...]quoted
+ + uart_clk: dummy26m { + compatible = "fixed-clock"; + clock-frequency = <26000000>; + #clock-cells = <0>; + }; + + timer { + compatible = "arm,armv8-timer"; + interrupt-parent = <&gic>; + interrupts = <GIC_PPI 13 + (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>, + <GIC_PPI 14 + (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>, + <GIC_PPI 11 + (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>, + <GIC_PPI 10 + (GIC_CPU_MASK_RAW(0x13) | IRQ_TYPE_LEVEL_LOW)>; + }; + + soc { + #address-cells = <2>; + #size-cells = <2>; + compatible = "simple-bus"; + ranges; + + uart5: serial at 1000f000 { + compatible = "mediatek,mt2712-uart", + "mediatek,mt6577-uart"; + reg = <0 0x1000f000 0 0x400>; + interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_LOW>; + clocks = <&uart_clk>;uart has two clocks, baud and bus clock. Please refer to the bindings descrption for more information, that's what they are for. Please define the two dummy clocks with the correct frequency and use them. Regards, Matthias
Okay, after checking Documentation/devicetree/bindings/serial/mtk-uart.txt, I will use baud and bus clock in the next version. yt.shen