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From: Chen-Yu Tsai <wens@csie.org>
Date: Mon, 14 Aug 2017 14:50:53 +0800
Message-ID: <CAGb2v67k6qvvSpJB65ORj6rSZhR0rHCvCJeBvnM-exBrGSaJZQ@mail.gmail.com>
Subject: Re: [linux-sunxi] [PATCH v5] arm64: allwinner: a64: Add initial
 NanoPi A64 support
To: Jagan Teki <jagannadh.teki@gmail.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>,
        Chen-Yu Tsai <wens@csie.org>, Icenowy Zheng <icenowy@aosc.io>,
        Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>,
        Michael Trimarchi <michael@amarulasolutions.com>,
        linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
        devicetree <devicetree@vger.kernel.org>,
        linux-kernel <linux-kernel@vger.kernel.org>,
        linux-sunxi <linux-sunxi@googlegroups.com>,
        Jagan Teki <jagan@amarulasolutions.com>
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Hi,

On Sat, Aug 12, 2017 at 1:38 PM, Jagan Teki <jagannadh.teki@gmail.com> wrote:
> From: Jagan Teki <jagan@amarulasolutions.com>
>
> NanoPi A64 is a new board of high performance with low cost
> designed by FriendlyElec., using the Allwinner A64 SOC.
>
> Nanopi A64 features
> - Allwinner A64, 64-bit Quad-core Cortex-A53@648MHz to 1.152GHz, DVFS
> - 1GB DDR3 RAM
> - MicroSD
> - Gigabit Ethernet (RTL8211E)
> - Wi-Fi 802.11b/g/n
> - IR receiver
> - Audio In/Out
> - Video In/Out
> - Serial Debug Port
> - microUSB 5V 2A DC power-supply
>
> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
> ---
> Changes for v5:
> - Add AXP803 PMIC regulator support.
> Changes for v4:
> - Rebased and droped wi-fi related nodes, since it require
>   other changes to taken care.
> Changes for v3:
> - Fix to use mmc1 for SDIO instead of mmc2
> - Replace buswidth by 4 instead of 8 mmc1
> - Drop cap-mmc-hw-reset for mmc1
> Changes for v2:
> - Added ohci0, ehci0, ohic1, ehci1, usbphy.
> - Tested on A64
>
>  arch/arm64/boot/dts/allwinner/Makefile             |   1 +
>  .../boot/dts/allwinner/sun50i-a64-nanopi-a64.dts   | 205 +++++++++++++++++++++
>  2 files changed, 206 insertions(+)
>  create mode 100644 arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts
>
> diff --git a/arch/arm64/boot/dts/allwinner/Makefile b/arch/arm64/boot/dts/allwinner/Makefile
> index 108f12c..c997b5c 100644
> --- a/arch/arm64/boot/dts/allwinner/Makefile
> +++ b/arch/arm64/boot/dts/allwinner/Makefile
> @@ -1,4 +1,5 @@
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-bananapi-m64.dtb
> +dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-nanopi-a64.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-orangepi-win.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-pine64-plus.dtb sun50i-a64-pine64.dtb
>  dtb-$(CONFIG_ARCH_SUNXI) += sun50i-a64-sopine-baseboard.dtb
> diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts
> new file mode 100644
> index 0000000..de98da1
> --- /dev/null
> +++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-nanopi-a64.dts
> @@ -0,0 +1,205 @@
> +/*
> + * Copyright (C) 2017 Jagan Teki <jteki@openedev.com>
> + *
> + * 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.
> + */
> +
> +/dts-v1/;
> +
> +#include "sun50i-a64.dtsi"
> +
> +#include <dt-bindings/gpio/gpio.h>
> +
> +/ {
> +       model = "FriendlyARM NanoPi A64";
> +       compatible = "friendlyarm,nanopi-a64", "allwinner,sun50i-a64";
> +
> +       aliases {
> +               serial0 = &uart0;
> +       };
> +
> +       chosen {
> +               stdout-path = "serial0:115200n8";
> +       };
> +};
> +
> +&ehci0 {
> +       status = "okay";
> +};

Does this actually work? Our drivers don't force the OTG/xHCI0 mux
one way or the other if there isn't an ID pin.

> +
> +&ehci1 {
> +       status = "okay";
> +};
> +
> +&i2c1 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&i2c1_pins>;
> +       status = "okay";

Please add a note saying this is on the standard RPi-compatible header,
as the ID I2C controller. And we normally don't enable peripherals on
the GPIO expansion by default either.

> +};
> +
> +&i2c1_pins {
> +       bias-pull-up;
> +};
> +
> +&mmc0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&mmc0_pins>;
> +       vmmc-supply = <&reg_dcdc1>;
> +       cd-gpios = <&pio 5 6 GPIO_ACTIVE_HIGH>;
> +       cd-inverted;
> +       disable-wp;
> +       bus-width = <4>;
> +       status = "okay";
> +};
> +
> +&ohci0 {
> +       status = "okay";
> +};
> +
> +&ohci1 {
> +       status = "okay";
> +};
> +
> +&r_rsb {
> +       status = "okay";
> +
> +       axp803: pmic@3a3 {
> +               compatible = "x-powers,axp803";
> +               reg = <0x3a3>;
> +               interrupt-parent = <&r_intc>;
> +               interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
> +       };
> +};
> +
> +&uart0 {
> +       pinctrl-names = "default";
> +       pinctrl-0 = <&uart0_pins_a>;
> +       status = "okay";
> +};

Please move uart0 below the bunch of regulators.

> +
> +#include "axp803.dtsi"
> +
> +&reg_aldo2 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-pl";
> +};
> +
> +&reg_aldo3 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <3000000>;
> +       regulator-max-microvolt = <3000000>;
> +       regulator-name = "vcc-pll-avcc";
> +};
> +
> +&reg_dcdc1 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <3000000>;
> +       regulator-max-microvolt = <3000000>;
> +       regulator-name = "vcc-3v";
> +};
> +
> +&reg_dcdc2 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1100000>;
> +       regulator-max-microvolt = <1100000>;
> +       regulator-name = "vdd-cpux";
> +};
> +
> +/* DCDC3 is polyphased with DCDC2 */
> +
> +&reg_dcdc5 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1500000>;
> +       regulator-max-microvolt = <1500000>;
> +       regulator-name = "vcc-dram";
> +};
> +
> +&reg_dcdc6 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1100000>;
> +       regulator-max-microvolt = <1100000>;
> +       regulator-name = "vdd-sys";
> +};
> +
> +&reg_dldo1 {
> +       regulator-min-microvolt = <3300000>;
> +       regulator-max-microvolt = <3300000>;
> +       regulator-name = "vcc-hdmi";
> +};
> +
> +&reg_dldo2 {
> +       regulator-min-microvolt = <3200000>;
> +       regulator-max-microvolt = <3200000>;
> +       regulator-name = "vcc-mipi";

The schematics say vcc-mipi is tied to DLDO1, and DLDO2 is unused.

> +};

DLDO4 is used to power the PG pin group (which should be always-on)
and I/O for the WiFi chip. It is missing here.

Regards
ChenYu

> +
> +&reg_eldo1 {
> +       regulator-min-microvolt = <1800000>;
> +       regulator-max-microvolt = <1800000>;
> +       regulator-name = "cpvdd";
> +};
> +
> +&reg_fldo1 {
> +       regulator-min-microvolt = <1200000>;
> +       regulator-max-microvolt = <1200000>;
> +       regulator-name = "vcc-1v2-hsic";
> +};
> +
> +/*
> + * The A64 chip cannot work without this regulator off, although
> + * it seems to be only driving the AR100 core.
> + * Maybe we don't still know well about CPUs domain.
> + */
> +&reg_fldo2 {
> +       regulator-always-on;
> +       regulator-min-microvolt = <1100000>;
> +       regulator-max-microvolt = <1100000>;
> +       regulator-name = "vdd-cpus";
> +};
> +
> +&reg_rtc_ldo {
> +       regulator-name = "vcc-rtc";
> +};
> +
> +
> +&usbphy {
> +       status = "okay";
> +};
> --
> 2.7.4
>
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