linux-kernel - Re: [PATCH v2 2/2] ARM: dts: Add support for 96Boards Meerkat96 board

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Message-ID: <20190618075534.GI29881@dragon>
Date:   Tue, 18 Jun 2019 15:55:36 +0800
From:   Shawn Guo <shawnguo@...nel.org>
To:     Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
Cc:     s.hauer@...gutronix.de, robh+dt@...nel.org, festevam@...il.com,
        kernel@...gutronix.de, linux-imx@....com,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, pbrobinson@...il.com,
        yossi@...tech.com
Subject: Re: [PATCH v2 2/2] ARM: dts: Add support for 96Boards Meerkat96 board

On Fri, Jun 14, 2019 at 05:14:33PM +0530, Manivannan Sadhasivam wrote:
> Hi Shawn,
> 
> On Thu, Jun 13, 2019 at 06:57:05PM +0530, Manivannan Sadhasivam wrote:
> > Add devicetree support for 96Boards Meerkat96 board from Novtech. This
> > board is one of the Consumer Edition boards of the 96Boards family based
> > on i.MX7D SoC. Following are the currently supported features of the
> > board:
> > 
> > * uSD
> > * WiFi/BT
> > * USB
> > 
> > More information about this board can be found in 96Boards product page:
> > https://www.96boards.org/product/imx7-96/
> > 
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > ---
> >  arch/arm/boot/dts/Makefile            |   1 +
> >  arch/arm/boot/dts/imx7d-meerkat96.dts | 389 ++++++++++++++++++++++++++
> >  2 files changed, 390 insertions(+)
> >  create mode 100644 arch/arm/boot/dts/imx7d-meerkat96.dts
> > 
> > diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> > index f4f5aeaf3298..3018a763dbd1 100644
> > --- a/arch/arm/boot/dts/Makefile
> > +++ b/arch/arm/boot/dts/Makefile
> > @@ -579,6 +579,7 @@ dtb-$(CONFIG_SOC_IMX7D) += \
> >  	imx7d-cl-som-imx7.dtb \
> >  	imx7d-colibri-emmc-eval-v3.dtb \
> >  	imx7d-colibri-eval-v3.dtb \
> > +	imx7d-meerkat96.dtb \
> >  	imx7d-nitrogen7.dtb \
> >  	imx7d-pico-hobbit.dtb \
> >  	imx7d-pico-pi.dtb \
> > diff --git a/arch/arm/boot/dts/imx7d-meerkat96.dts b/arch/arm/boot/dts/imx7d-meerkat96.dts
> > new file mode 100644
> > index 000000000000..a86dc4878e44
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/imx7d-meerkat96.dts
> > @@ -0,0 +1,389 @@
> > +// SPDX-License-Identifier: GPL-2.0+ OR MIT
> > +/*
> > + * Copyright (C) 2019 Linaro Ltd.
> > + */
> > +
> > +/dts-v1/;
> > +
> > +#include "imx7d.dtsi"
> > +
> > +/ {
> > +	model = "96Boards Meerkat96 Board";
> > +	compatible = "novtech,imx7d-meerkat96", "fsl,imx7d";
> > +
> > +	chosen {
> > +		stdout-path = &uart6;
> > +	};
> > +
> > +	memory@...00000 {
> > +		device_type = "memory";
> > +		reg = <0x80000000 0x20000000>; /* 512MB */
> > +	};
> > +
> > +	reg_wlreg_on: regulator-wlreg-on {
> > +		compatible = "regulator-fixed";
> > +		pinctrl-names = "default";
> > +		pinctrl-0 = <&pinctrl_wlreg_on>;
> > +		regulator-name = "wlreg_on";
> > +		regulator-min-microvolt = <3300000>;
> > +		regulator-max-microvolt = <3300000>;
> > +		startup-delay-us = <100>;
> > +		gpio = <&gpio6 15 GPIO_ACTIVE_HIGH>;
> > +		enable-active-high;
> > +		regulator-always-on;
> > +	};
> > +
> > +	reg_3p3v: regulator-3p3v {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "3P3V";
> > +		regulator-min-microvolt = <3300000>;
> > +		regulator-max-microvolt = <3300000>;
> > +		regulator-always-on;
> > +	};
> > +
> > +	reg_usb_otg1_vbus: regulator-usb-otg1-vbus {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "usb_otg1_vbus";
> > +		regulator-min-microvolt = <5000000>;
> > +		regulator-max-microvolt = <5000000>;
> > +	};
> > +
> > +	reg_usb_otg2_vbus: regulator-usb-otg2-vbus {
> > +		compatible = "regulator-fixed";
> > +		regulator-name = "usb_otg2_vbus";
> > +		regulator-min-microvolt = <5000000>;
> > +		regulator-max-microvolt = <5000000>;
> > +		gpio = <&gpio1 2 GPIO_ACTIVE_HIGH>;
> > +		enable-active-high;
> > +	};
> > +
> > +	sw1a_reg: sw1a {
> > +		compatible = "regulator-fixed";
> 
> Actually I was wrong here. This is not a fixed regulator node as the voltage
> level varies. Since there is no PMIC support exist now, can I remove this node?
> Or I should make it as fixed 0.7v?

I dropped it (&cpu0 as well) and applied both patches.  You can add it
later when you have the right information about it.

Shawn