Re: [PATCH v6 1/2] arm64: dts: Add support for Spreadtrum SC9836 SoC in dts and Makefile
From: Mark Rutland
Date: Fri Jan 23 2015 - 06:17:56 EST
On Fri, Jan 23, 2015 at 11:13:29AM +0000, Lyra Zhang wrote:
> On Fri, Jan 23, 2015 at 6:36 PM, Mark Rutland <mark.rutland@xxxxxxx> wrote:
> > On Fri, Jan 23, 2015 at 10:21:30AM +0000, Chunyan Zhang wrote:
> >> From: Zhizhou Zhang <zhizhou.zhang@xxxxxxxxxxxxxx>
> >>
> >> Adds the device tree support for Spreadtrum SC9836 SoC which is based on
> >> Sharkl64 platform.
> >>
> >> Sharkl64 platform contains the common nodes of Spreadtrum's arm64-based SoCs.
> >>
> >> Signed-off-by: Zhizhou Zhang <zhizhou.zhang@xxxxxxxxxxxxxx>
> >> Signed-off-by: Orson Zhai <orson.zhai@xxxxxxxxxxxxxx>
> >> Signed-off-by: Chunyan Zhang <chunyan.zhang@xxxxxxxxxxxxxx>
> >> ---
> >> arch/arm64/boot/dts/Makefile | 1 +
> >> arch/arm64/boot/dts/sprd/Makefile | 5 ++
> >> arch/arm64/boot/dts/sprd/sc9836-openphone.dts | 49 ++++++++++++++++
> >> arch/arm64/boot/dts/sprd/sc9836.dtsi | 74 +++++++++++++++++++++++++
> >> arch/arm64/boot/dts/sprd/sharkl64.dtsi | 65 ++++++++++++++++++++++
> >> 5 files changed, 194 insertions(+)
> >> create mode 100644 arch/arm64/boot/dts/sprd/Makefile
> >> create mode 100644 arch/arm64/boot/dts/sprd/sc9836-openphone.dts
> >> create mode 100644 arch/arm64/boot/dts/sprd/sc9836.dtsi
> >> create mode 100644 arch/arm64/boot/dts/sprd/sharkl64.dtsi
> >>
> >> diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
> >> index 3b8d427..806a717 100644
> >> --- a/arch/arm64/boot/dts/Makefile
> >> +++ b/arch/arm64/boot/dts/Makefile
> >> @@ -2,6 +2,7 @@ dts-dirs += amd
> >> dts-dirs += apm
> >> dts-dirs += arm
> >> dts-dirs += cavium
> >> +dts-dirs += sprd
> >>
> >> always := $(dtb-y)
> >> subdir-y := $(dts-dirs)
> >> diff --git a/arch/arm64/boot/dts/sprd/Makefile b/arch/arm64/boot/dts/sprd/Makefile
> >> new file mode 100644
> >> index 0000000..b658c5e
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/sprd/Makefile
> >> @@ -0,0 +1,5 @@
> >> +dtb-$(CONFIG_ARCH_SPRD) += sc9836-openphone.dtb
> >> +
> >> +always := $(dtb-y)
> >> +subdir-y := $(dts-dirs)
> >> +clean-files := *.dtb
> >> diff --git a/arch/arm64/boot/dts/sprd/sc9836-openphone.dts b/arch/arm64/boot/dts/sprd/sc9836-openphone.dts
> >> new file mode 100644
> >> index 0000000..b8a69b2
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/sprd/sc9836-openphone.dts
> >> @@ -0,0 +1,49 @@
> >> +/*
> >> + * Spreadtrum SC9836 openphone board DTS file
> >> + *
> >> + * Copyright (C) 2014, Spreadtrum Communications Inc.
> >> + *
> >> + * This file is licensed under a dual GPLv2 or X11 license.
> >> + */
> >> +
> >> +/dts-v1/;
> >> +
> >> +#include "sc9836.dtsi"
> >> +
> >> +/ {
> >> + model = "Spreadtrum SC9836 Openphone Board";
> >> +
> >> + compatible = "sprd,sc9836-openphone", "sprd,sc9836";
> >> +
> >> + aliases {
> >> + serial0 = &uart0;
> >> + serial1 = &uart1;
> >> + serial2 = &uart2;
> >> + serial3 = &uart3;
> >> + };
> >> +
> >> + memory@80000000 {
> >> + device_type = "memory";
> >> + reg = <0 0x80000000 0 0x20000000>;
> >> + };
> >> +
> >> + chosen {
> >> + stdout-path = &uart0;
> >> + };
> >
> > It would be good to use an explicit configuration here. e.g. have:
> >
> > chosen {
> > stdout-path = "serial0:115200n8";
> > };
> >
> > Where '115200n8' is replaced by whatever the bootloader leaves the UART
> > configured as on this board.
> >
> > That means you won't need a 'console=' to get nice consistent serial
> > output at boot, and won't be relying on implicit defaults all over the
> > place.
> >
>
> ok, I've changed and tested pass.
>
> >> +};
> >> +
> >> +&uart0 {
> >> + status = "okay";
> >> +};
> >> +
> >> +&uart1 {
> >> + status = "okay";
> >> +};
> >> +
> >> +&uart2 {
> >> + status = "okay";
> >> +};
> >> +
> >> +&uart3 {
> >> + status = "okay";
> >> +};
> >> diff --git a/arch/arm64/boot/dts/sprd/sc9836.dtsi b/arch/arm64/boot/dts/sprd/sc9836.dtsi
> >> new file mode 100644
> >> index 0000000..c646123
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/sprd/sc9836.dtsi
> >> @@ -0,0 +1,74 @@
> >> +/*
> >> + * Spreadtrum SC9836 SoC DTS file
> >> + *
> >> + * Copyright (C) 2014, Spreadtrum Communications Inc.
> >> + *
> >> + * This file is licensed under a dual GPLv2 or X11 license.
> >> + */
> >> +
> >> +#include "sharkl64.dtsi"
> >> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> >> +
> >> +/ {
> >> + compatible = "sprd,sc9836";
> >> +
> >> + cpus {
> >> + #address-cells = <2>;
> >> + #size-cells = <0>;
> >> +
> >> + cpu@0 {
> >> + device_type = "cpu";
> >> + compatible = "arm,cortex-a53", "arm,armv8";
> >> + reg = <0x0 0x0>;
> >> + enable-method = "psci";
> >> + };
> >> +
> >> + cpu@1 {
> >> + device_type = "cpu";
> >> + compatible = "arm,cortex-a53", "arm,armv8";
> >> + reg = <0x0 0x1>;
> >> + enable-method = "psci";
> >> + };
> >> +
> >> + cpu@2 {
> >> + device_type = "cpu";
> >> + compatible = "arm,cortex-a53", "arm,armv8";
> >> + reg = <0x0 0x2>;
> >> + enable-method = "psci";
> >> + };
> >> +
> >> + cpu@3 {
> >> + device_type = "cpu";
> >> + compatible = "arm,cortex-a53", "arm,armv8";
> >> + reg = <0x0 0x3>;
> >> + enable-method = "psci";
> >> + };
> >> + };
> >> +
> >> + gic: interrupt-controller@12001000 {
> >> + compatible = "arm,gic-400";
> >> + reg = <0 0x12001000 0 0x1000>,
> >> + <0 0x12002000 0 0x2000>,
> >> + <0 0x12004000 0 0x2000>,
> >> + <0 0x12006000 0 0x2000>;
> >> + #interrupt-cells = <3>;
> >> + interrupt-controller;
> >> + interrupts = <GIC_PPI 9 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_HIGH)>;
> >> + };
> >> +
> >> + psci {
> >> + compatible = "arm,psci";
> >> + method = "smc";
> >> + cpu_on = <0xc4000003>;
> >> + cpu_off = <0x84000002>;
> >> + cpu_suspend = <0xc4000001>;
> >> + };
> >
> > Given that there are no suspend states in this dts, the cpu_suspend
> > property here could be omitted for now (though I guess it doesn't matter
> > either way).
> >
> >> +
> >> + timer {
> >> + compatible = "arm,armv8-timer";
> >> + interrupts = <GIC_PPI 13 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> >> + <GIC_PPI 14 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> >> + <GIC_PPI 11 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>,
> >> + <GIC_PPI 10 (GIC_CPU_MASK_SIMPLE(4) | IRQ_TYPE_LEVEL_LOW)>;
> >> + };
> >> +};
> >> diff --git a/arch/arm64/boot/dts/sprd/sharkl64.dtsi b/arch/arm64/boot/dts/sprd/sharkl64.dtsi
> >> new file mode 100644
> >> index 0000000..6b4bdc5
> >> --- /dev/null
> >> +++ b/arch/arm64/boot/dts/sprd/sharkl64.dtsi
> >> @@ -0,0 +1,65 @@
> >> +/*
> >> + * Spreadtrum Sharkl64 platform DTS file
> >> + *
> >> + * Copyright (C) 2014, Spreadtrum Communications Inc.
> >> + *
> >> + * This file is licensed under a dual GPLv2 or X11 license.
> >> + */
> >> +
> >> +/ {
> >> + interrupt-parent = <&gic>;
> >> + #address-cells = <2>;
> >> + #size-cells = <2>;
> >> +
> >> + soc {
> >> + compatible = "simple-bus";
> >> + #address-cells = <2>;
> >> + #size-cells = <2>;
> >> + ranges;
> >> +
> >> + ap-apb {
> >> + compatible = "simple-bus";
> >> + #address-cells = <2>;
> >> + #size-cells = <2>;
> >> + ranges;
> >> +
> >> + uart0: serial@70000000 {
> >> + compatible = "sprd,sc9836-uart";
> >> + reg = <0 0x70000000 0 0x100>;
> >> + interrupts = <0 2 0xf04>;
> >> + clocks = <&clk26mhz>;
> >> + status = "disabled";
> >> + };
> >> +
> >> + uart1: serial@70100000 {
> >> + compatible = "sprd,sc9836-uart";
> >> + reg = <0 0x70100000 0 0x100>;
> >> + interrupts = <0 3 0xf04>;
> >> + clocks = <&clk26mhz>;
> >> + status = "disabled";
> >> + };
> >> +
> >> + uart2: serial@70200000 {
> >> + compatible = "sprd,sc9836-uart";
> >> + reg = <0 0x70200000 0 0x100>;
> >> + interrupts = <0 2 0xf04>;
> >> + clocks = <&clk26mhz>;
> >> + status = "disabled";
> >> + };
> >> +
> >> + uart3: serial@70300000 {
> >> + compatible = "sprd,sc9836-uart";
> >> + reg = <0 0x70300000 0 0x100>;
> >> + interrupts = <0 3 0xf04>;
> >> + clocks = <&clk26mhz>;
> >> + status = "disabled";
> >> + };
> >> + };
> >> + };
> >> +
> >> + clk26mhz: clk26mhz {
> >> + compatible = "fixed-clock";
> >> + #clock-cells = <0>;
> >> + clock-frequency = <26000000>;
> >> + };
> >> +};
> >
> > Other than my comments above, this looks fine to me. I assume the UART
> > binding and driver are already queued somewhere else?
> >
>
> Since the last version patch series must be split for applying.
> I'll send the UART bindings with UART driver soon.
>
> For this case, can I still add your Acked-by and send these two patch
> to Greg right now?
If the UART patches aren't queued yet then I'd like to take a look at
their next posting first.
Surely these 2 patches (with parts under arch/arm64) should go via
arm-soc?
Thanks,
Mark.
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