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[PATCH 3/8] ARM64: dts: Prepare configs for Amlogic Meson GXBaby

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  [PATCH 3/8] ARM64: dts: Prepare configs for Amlogic Meson GXBaby Andreas Färber <afaerber@suse.de> - 2016-03-01 00:50 +0100
    Re: [PATCH 3/8] ARM64: dts: Prepare configs for Amlogic Meson GXBaby Sudeep Holla <sudeep.holla@arm.com> - 2016-03-01 15:50 +0100
      Re: [PATCH 3/8] ARM64: dts: Prepare configs for Amlogic Meson GXBaby Andreas Färber <afaerber@suse.de> - 2016-03-01 16:20 +0100
        Re: [PATCH 3/8] ARM64: dts: Prepare configs for Amlogic Meson GXBaby Sudeep Holla <sudeep.holla@arm.com> - 2016-03-01 17:20 +0100

#1346261 — [PATCH 3/8] ARM64: dts: Prepare configs for Amlogic Meson GXBaby

Signed-off-by: Andreas Färber <afaerber@suse.de>
---
 arch/arm64/boot/dts/Makefile                |   1 +
 arch/arm64/boot/dts/amlogic/Makefile        |   3 +
 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 128 ++++++++++++++++++++++++++++
 3 files changed, 132 insertions(+)
 create mode 100644 arch/arm64/boot/dts/amlogic/Makefile
 create mode 100644 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi

diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
index fd80617a9c6f..330fae966cf3 100644
--- a/arch/arm64/boot/dts/Makefile
+++ b/arch/arm64/boot/dts/Makefile
@@ -1,6 +1,7 @@
 dts-dirs += al
 dts-dirs += altera
 dts-dirs += amd
+dts-dirs += amlogic
 dts-dirs += apm
 dts-dirs += arm
 dts-dirs += broadcom
diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
new file mode 100644
index 000000000000..1b06c28c67eb
--- /dev/null
+++ b/arch/arm64/boot/dts/amlogic/Makefile
@@ -0,0 +1,3 @@
+always		:= $(dtb-y)
+subdir-y	:= $(dts-dirs)
+clean-files	:= *.dtb
diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
new file mode 100644
index 000000000000..0ae089bd1806
--- /dev/null
+++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
@@ -0,0 +1,128 @@
+/*
+ * Copyright (c) 2016 Andreas Färber
+ *
+ * This file is dual-licensed: you can use it either under the terms
+ * of the GPL or the X11 license, at your option. Note that this dual
+ * licensing only applies to this file, and not this project as a
+ * whole.
+ *
+ *  a) This library is free software; you can redistribute it and/or
+ *     modify it under the terms of the GNU General Public License as
+ *     published by the Free Software Foundation; either version 2 of the
+ *     License, or (at your option) any later version.
+ *
+ *     This library is distributed in the hope that it will be useful,
+ *     but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *     GNU General Public License for more details.
+ *
+ * Or, alternatively,
+ *
+ *  b) Permission is hereby granted, free of charge, to any person
+ *     obtaining a copy of this software and associated documentation
+ *     files (the "Software"), to deal in the Software without
+ *     restriction, including without limitation the rights to use,
+ *     copy, modify, merge, publish, distribute, sublicense, and/or
+ *     sell copies of the Software, and to permit persons to whom the
+ *     Software is furnished to do so, subject to the following
+ *     conditions:
+ *
+ *     The above copyright notice and this permission notice shall be
+ *     included in all copies or substantial portions of the Software.
+ *
+ *     THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *     EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ *     OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *     NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ *     HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ *     WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ *     FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ *     OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include <dt-bindings/gpio/gpio.h>
+#include <dt-bindings/interrupt-controller/irq.h>
+#include <dt-bindings/interrupt-controller/arm-gic.h>
+
+/ {
+	compatible = "amlogic,meson-gxbb";
+	interrupt-parent = <&gic>;
+	#address-cells = <2>;
+	#size-cells = <2>;
+
+	cpus {
+		#address-cells = <0x2>;
+		#size-cells = <0x0>;
+
+		cpu0: cpu@0 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x0>;
+			enable-method = "psci";
+		};
+
+		cpu1: cpu@1 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x1>;
+			enable-method = "psci";
+		};
+
+		cpu2: cpu@2 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x2>;
+			enable-method = "psci";
+		};
+
+		cpu3: cpu@3 {
+			device_type = "cpu";
+			compatible = "arm,cortex-a53", "arm,armv8";
+			reg = <0x0 0x3>;
+			enable-method = "psci";
+		};
+	};
+
+	arm-pmu {
+		compatible = "arm,armv8-pmuv3";
+		interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
+			     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
+		interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
+	};
+
+	psci {
+		compatible = "arm,psci";
+		method = "smc";
+		cpu_suspend = <0xc4000001>;
+		cpu_off = <0x84000002>;
+		cpu_on = <0xc4000003>;
+		migrate = <0xc4000005>;
+	};
+
+	xtal: xtal-clk {
+		compatible = "fixed-clock";
+		clock-frequency = <24000000>;
+		clock-output-names = "xtal";
+		#clock-cells = <0>;
+	};
+
+	soc {
+		compatible = "simple-bus";
+		#address-cells = <2>;
+		#size-cells = <2>;
+		ranges;
+
+		gic: interrupt-controller@c4301000 {
+			compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";
+			reg = <0x0 0xc4301000 0 0x1000>,
+			      <0x0 0xc4302000 0 0x0100>;
+			interrupt-controller;
+			interrupts = <GIC_PPI 9
+				(GIC_CPU_MASK_SIMPLE(8) | IRQ_TYPE_LEVEL_HIGH)>;
+			#interrupt-cells = <3>;
+			#address-cells = <0>;
+		};
+	};
+};
-- 
2.6.2

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#1346664

On 29/02/16 23:44, Andreas Färber wrote:
> Signed-off-by: Andreas Färber <afaerber@suse.de>
> ---
>   arch/arm64/boot/dts/Makefile                |   1 +
>   arch/arm64/boot/dts/amlogic/Makefile        |   3 +
>   arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi | 128 ++++++++++++++++++++++++++++
>   3 files changed, 132 insertions(+)
>   create mode 100644 arch/arm64/boot/dts/amlogic/Makefile
>   create mode 100644 arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
>
> diff --git a/arch/arm64/boot/dts/Makefile b/arch/arm64/boot/dts/Makefile
> index fd80617a9c6f..330fae966cf3 100644
> --- a/arch/arm64/boot/dts/Makefile
> +++ b/arch/arm64/boot/dts/Makefile
> @@ -1,6 +1,7 @@
>   dts-dirs += al
>   dts-dirs += altera
>   dts-dirs += amd
> +dts-dirs += amlogic
>   dts-dirs += apm
>   dts-dirs += arm
>   dts-dirs += broadcom
> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
> new file mode 100644
> index 000000000000..1b06c28c67eb
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/Makefile
> @@ -0,0 +1,3 @@
> +always		:= $(dtb-y)
> +subdir-y	:= $(dts-dirs)
> +clean-files	:= *.dtb
> diff --git a/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> new file mode 100644
> index 000000000000..0ae089bd1806
> --- /dev/null
> +++ b/arch/arm64/boot/dts/amlogic/meson-gxbb.dtsi
> @@ -0,0 +1,128 @@

[...]

> +
> +#include <dt-bindings/gpio/gpio.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> +/ {
> +	compatible = "amlogic,meson-gxbb";
> +	interrupt-parent = <&gic>;
> +	#address-cells = <2>;
> +	#size-cells = <2>;
> +
> +	cpus {
> +		#address-cells = <0x2>;
> +		#size-cells = <0x0>;
> +

[...]

> +	};
> +
> +	arm-pmu {
> +		compatible = "arm,armv8-pmuv3";

Please use "arm,cortex-a53-pmu" instead

> +		interrupts = <GIC_SPI 137 IRQ_TYPE_LEVEL_HIGH>,
> +			     <GIC_SPI 138 IRQ_TYPE_LEVEL_HIGH>,
> +			     <GIC_SPI 153 IRQ_TYPE_LEVEL_HIGH>,
> +			     <GIC_SPI 154 IRQ_TYPE_LEVEL_HIGH>;
> +		interrupt-affinity = <&cpu0>, <&cpu1>, <&cpu2>, <&cpu3>;
> +	};
> +
> +	psci {
> +		compatible = "arm,psci";

Any particular reason why PSCI v0.2 or above is not supported on this
platform. PSCI v0.1 is very old now and I assume this platform is
relatively new.

> +		method = "smc";
> +		cpu_suspend = <0xc4000001>;
> +		cpu_off = <0x84000002>;
> +		cpu_on = <0xc4000003>;
> +		migrate = <0xc4000005>;

Atleast the functions ids look like v0.2 or above. So check if it's 
actually v0.2 or above in which case you can drop all the function ids above

[...]

> +	soc {
> +		compatible = "simple-bus";
> +		#address-cells = <2>;
> +		#size-cells = <2>;
> +		ranges;
> +
> +		gic: interrupt-controller@c4301000 {
> +			compatible = "arm,cortex-a15-gic", "arm,cortex-a9-gic";

Preferably "arm,gic-400" ?

-- 
Regards,
Sudeep

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#1346684

Am 01.03.2016 um 15:43 schrieb Sudeep Holla:
> On 29/02/16 23:44, Andreas Färber wrote:
>> +    psci {
>> +        compatible = "arm,psci";
> 
> Any particular reason why PSCI v0.2 or above is not supported on this
> platform. PSCI v0.1 is very old now and I assume this platform is
> relatively new.

I am not affiliated with Amlogic or Tronsmart, so I cannot answer why.

>> +        method = "smc";
>> +        cpu_suspend = <0xc4000001>;
>> +        cpu_off = <0x84000002>;
>> +        cpu_on = <0xc4000003>;
>> +        migrate = <0xc4000005>;
> 
> Atleast the functions ids look like v0.2 or above. So check if it's
> actually v0.2 or above

If you let me know how! Just change the compatible string to -0.2 and
wait for some big boom or watch out for any misbehavior in particular?
Are there any memory locations to check the version or something visible
in U-Boot source code indicating it?

Regards,
Andreas

-- 
SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer, Jane Smithard, Graham Norton; HRB 21284 (AG Nürnberg)

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#1346727

On 01/03/16 15:18, Andreas Färber wrote:
> Am 01.03.2016 um 15:43 schrieb Sudeep Holla:
>> On 29/02/16 23:44, Andreas Färber wrote:
>>> +    psci {
>>> +        compatible = "arm,psci";
>>
>> Any particular reason why PSCI v0.2 or above is not supported on this
>> platform. PSCI v0.1 is very old now and I assume this platform is
>> relatively new.
>
> I am not affiliated with Amlogic or Tronsmart, so I cannot answer why.
>

OK

>>> +        method = "smc";
>>> +        cpu_suspend = <0xc4000001>;
>>> +        cpu_off = <0x84000002>;
>>> +        cpu_on = <0xc4000003>;
>>> +        migrate = <0xc4000005>;
>>
>> Atleast the functions ids look like v0.2 or above. So check if it's
>> actually v0.2 or above
>
> If you let me know how! Just change the compatible string to -0.2 and
> wait for some big boom or watch out for any misbehavior in particular?

Not exactly. Just having -0.2 in compatible will issue PSCI_VERSION
which *should be* available in v0.2 and above. If you get error there,
then we can *assume* it's PSCI v0.1. Hopefully it be sanely return
error if that's not implemented.

Note that we can only assume, as it might be v0.2 but missed to
implement PSCI_VERSION which is mandatory though.

> Are there any memory locations to check the version or something visible
> in U-Boot source code indicating it?
>

Ah so, PSCI is implemented in U-Boot on this platform ? If so, and if
the source is available it should not be that hard to figure that out.

-- 
Regards,
Sudeep

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