Re: [PATCH v3 2/3] arm64: dts: mt7622: add basic nodes to the mt7622.dtsi file
From: Matthias Brugger
Date: Thu Jun 08 2017 - 12:24:39 EST
On 08/06/17 18:07, Sean Wang wrote:
On Thu, 2017-06-08 at 15:52 +0200, Matthias Brugger wrote:
On 31/05/17 19:29, sean.wang@xxxxxxxxxxxx wrote:
From: Sean Wang <sean.wang@xxxxxxxxxxxx>
add basic nodes into the mt7622.dtsi for the system
bring-up which includes ARM CPU, GIC, timer, MediaTek
UART, SYSIRQ and one reserved memory region for ATF.
Signed-off-by: Sean Wang <sean.wang@xxxxxxxxxxxx>
---
arch/arm64/boot/dts/mediatek/mt7622.dtsi | 103 +++++++++++++++++++++++++++++++
1 file changed, 103 insertions(+)
create mode 100644 arch/arm64/boot/dts/mediatek/mt7622.dtsi
diff --git a/arch/arm64/boot/dts/mediatek/mt7622.dtsi b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
new file mode 100644
index 0000000..2031b73
--- /dev/null
+++ b/arch/arm64/boot/dts/mediatek/mt7622.dtsi
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2017 MediaTek Inc.
+ * Author: Ming Huang <ming.huang@xxxxxxxxxxxx>
+ * Sean Wang <sean.wang@xxxxxxxxxxxx>
+ *
+ * SPDX-License-Identifier: (GPL-2.0 OR MIT)
+ */
+
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+ compatible = "mediatek,mt7622";
+ interrupt-parent = <&sysirq>;
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ cpus {
+ #address-cells = <2>;
+ #size-cells = <0>;
+
+ cpu0: cpu@0 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a53", "arm,armv8";
+ reg = <0x0 0x0>;
+ enable-method = "psci";
+ clock-frequency = <1300000000>;
+ };
+
+ cpu1: cpu@1 {
+ device_type = "cpu";
+ compatible = "arm,cortex-a53", "arm,armv8";
+ reg = <0x0 0x1>;
+ enable-method = "psci";
+ clock-frequency = <1300000000>;
+ };
+ };
+
+ uart_clk: dummy26m {
+ compatible = "fixed-clock";
+ #clock-cells = <0>;
+ clock-frequency = <25000000>;
+ };
+
+ psci {
+ compatible = "arm,psci-0.2";
+ method = "smc";
+ };
+
+ reserved-memory {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ ranges;
+
+ /* 192 KiB reserved for ARM Trusted Firmware (BL31) */
+ secmon_reserved: secmon@43000000 {
+ reg = <0 0x43000000 0 0x30000>;
+ no-map;
+ };
+ };
+
+ timer {
+ compatible = "arm,armv8-timer";
+ interrupt-parent = <&gic>;
+ interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(2) |
+ IRQ_TYPE_LEVEL_HIGH)>,
+ <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(2) |
+ IRQ_TYPE_LEVEL_HIGH)>,
+ <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(2) |
+ IRQ_TYPE_LEVEL_HIGH)>,
+ <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(2) |
+ IRQ_TYPE_LEVEL_HIGH)>;
+ };
+
+ sysirq: interrupt-controller@10200620 {
+ compatible = "mediatek,mt7622-sysirq",
+ "mediatek,mt6577-sysirq";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&gic>;
+ reg = <0 0x10200620 0 0x20>;
+ };
+
+ gic: interrupt-controller@10300000 {
+ compatible = "arm,gic-400";
+ interrupt-controller;
+ #interrupt-cells = <3>;
+ interrupt-parent = <&gic>;
+ reg = <0 0x10310000 0 0x1000>,
+ <0 0x10320000 0 0x1000>,
+ <0 0x10340000 0 0x2000>,
+ <0 0x10360000 0 0x2000>;
+ };
+
+ uart0: serial@11002000 {
+ compatible = "mediatek,mt7622-uart",
+ "mediatek,mt6577-uart";
+ reg = <0 0x11002000 0 0x400>;
+ interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_LOW>;
+ clocks = <&uart_clk>;
mt6577-uart has two clocks. Please fix this.
Those two real clocks which UART requires will be updated once the
MT7622 clock driver and the relevant binding header are all ready.
So currently the UART is using dummy clock node instead.
Is it allowed?
Yes, no problem with dummy clocks at this point in time, but please
stick to the binding.
Regards,
Matthias
I would appreciate if you could rebase on the mediatek for-next branch
(especially for 3/3), which will make it easier for me to take this.
O.K. I will rebase on your tree
Sean
Regards,
Matthias