linux-kernel - Re: [PATCH v5 3/3] arm64: dts: meson: Add minimal support for Odroid-N2

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Date:   Wed, 5 Jun 2019 09:33:16 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Anand Moon <linux.amoon@...il.com>
Cc:     Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-amlogic@...ts.infradead.org,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v5 3/3] arm64: dts: meson: Add minimal support for
 Odroid-N2

On 03/06/2019 14:00, Anand Moon wrote:
> Hi Niel,
> 
> On Mon, 3 Jun 2019 at 14:41, Neil Armstrong <narmstrong@...libre.com> wrote:
>>
>> This patch adds basic support for :
>> - Amlogic G12B, which is very similar to G12A
>> - The HardKernel Odroid-N2 based on the S922X SoC
>>
>> The Amlogic G12B SoC is very similar with the G12A SoC, sharing
>> most of the features and architecture, but with these differences :
>> - The first CPU cluster only has 2xCortex-A53 instead of 4
>> - G12B has a second cluster of 4xCortex-A73
>> - Both cluster can achieve 2GHz instead of 1,8GHz for G12A
>> - CPU Clock architecture is difference, thus needing a different
>>   compatible to handle this slight difference
>> - Supports a MIPI CSI input
>> - Embeds a Mali-G52 instead of a Mali-G31, but integration is the same
>>
>> Actual support is done in the same way as for the GXM support, including
>> the G12A dtsi and redefining the CPU clusters.
>> Unlike GXM, the first cluster is different, thus needing to remove
>> the last 2 cpu nodes of the first cluster.
>>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> Reviewed-by: Martin Blumenstingl <martin.blumenstingl@...glemail.com>
>> ---
>>  arch/arm64/boot/dts/amlogic/Makefile          |   1 +
>>  .../boot/dts/amlogic/meson-g12b-odroid-n2.dts | 289 ++++++++++++++++++
>>  arch/arm64/boot/dts/amlogic/meson-g12b.dtsi   |  82 +++++
>>  3 files changed, 372 insertions(+)
>>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
>>  create mode 100644 arch/arm64/boot/dts/amlogic/meson-g12b.dtsi
>>
>> diff --git a/arch/arm64/boot/dts/amlogic/Makefile b/arch/arm64/boot/dts/amlogic/Makefile
>> index e129c03ced14..07b861fe5fa5 100644
>> --- a/arch/arm64/boot/dts/amlogic/Makefile
>> +++ b/arch/arm64/boot/dts/amlogic/Makefile
>> @@ -3,6 +3,7 @@ dtb-$(CONFIG_ARCH_MESON) += meson-axg-s400.dtb
>>  dtb-$(CONFIG_ARCH_MESON) += meson-g12a-sei510.dtb
>>  dtb-$(CONFIG_ARCH_MESON) += meson-g12a-u200.dtb
>>  dtb-$(CONFIG_ARCH_MESON) += meson-g12a-x96-max.dtb
>> +dtb-$(CONFIG_ARCH_MESON) += meson-g12b-odroid-n2.dtb
>>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nanopi-k2.dtb
>>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-nexbox-a95x.dtb
>>  dtb-$(CONFIG_ARCH_MESON) += meson-gxbb-odroidc2.dtb
>> diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
>> new file mode 100644
>> index 000000000000..161d8f0ff4f3
>> --- /dev/null
>> +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts
>> @@ -0,0 +1,289 @@
>> +// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>> +/*
>> + * Copyright (c) 2019 BayLibre, SAS
>> + * Author: Neil Armstrong <narmstrong@...libre.com>
>> + */
>> +
>> +/dts-v1/;
>> +
>> +#include "meson-g12b.dtsi"
>> +#include <dt-bindings/input/input.h>
>> +#include <dt-bindings/gpio/meson-g12a-gpio.h>
>> +
>> +/ {
>> +       compatible = "hardkernel,odroid-n2", "amlogic,g12b";
>> +       model = "Hardkernel ODROID-N2";
>> +
>> +       aliases {
>> +               serial0 = &uart_AO;
>> +               ethernet0 = &ethmac;
>> +       };
>> +

[...]

>> +
>> +       main_12v: regulator-main_12v {
>> +               compatible = "regulator-fixed";
>> +               regulator-name = "12V";
>> +               regulator-min-microvolt = <12000000>;
>> +               regulator-max-microvolt = <12000000>;
>> +               regulator-always-on;
>> +       };
>> +
>> +       vcc_5v: regulator-vcc_5v {
>> +               compatible = "regulator-fixed";
>> +               regulator-name = "5V";
>> +               regulator-min-microvolt = <5000000>;
>> +               regulator-max-microvolt = <5000000>;
>> +               regulator-always-on;
> 
> As per odroid-n2_rev0.4_20190307 schematic its missing.
>                   vin-supply =  <&main_12v>;
> 
> With this please add my.
> Tested-by: Anand Moon <linux.amoon@...il.com>

Good catch, thanks Anand.

@Kevin, should I resend ?

Neil

> 
> Best Regards
> -Anand
>> +       };
>> +
>> +       vcc_1v8: regulator-vcc_1v8 {
>> +               compatible = "regulator-fixed";
>> +               regulator-name = "VCC_1V8";
>> +               regulator-min-microvolt = <1800000>;
>> +               regulator-max-microvolt = <1800000>;
>> +               vin-supply = <&vcc_3v3>;
>> +               regulator-always-on;
>> +       };
>> +

[...]

>> +
>> +&clkc {
>> +       compatible = "amlogic,g12b-clkc";
>> +};
>> --
>> 2.21.0
>>
>>
>> _______________________________________________
>> linux-amlogic mailing list
>> linux-amlogic@...ts.infradead.org
>> http://lists.infradead.org/mailman/listinfo/linux-amlogic

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