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Date: Wed, 21 Nov 2018 01:01:37 +0530
From: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
To: Rob Herring <robh+dt@...nel.org>
Cc: Olof Johansson <olof@...om.net>, Arnd Bergmann <arnd@...db.de>,
Thomas Gleixner <tglx@...utronix.de>,
Jason Cooper <jason@...edaemon.net>,
Marc Zyngier <marc.zyngier@....com>,
Daniel Lezcano <daniel.lezcano@...aro.org>,
"moderated list:ARM/FREESCALE IMX / MXC ARM ARCHITECTURE"
<linux-arm-kernel@...ts.infradead.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
devicetree@...r.kernel.org,
Amit Kucheria <amit.kucheria@...aro.org>,
Linus Walleij <linus.walleij@...aro.org>, zhao_steven@....net,
Andreas Färber <afaerber@...e.de>
Subject: Re: [PATCH 04/16] arm: dts: Add devicetree for RDA8810PL SoC
Hi Rob,
On Mon, Nov 19, 2018 at 12:25:58PM -0600, Rob Herring wrote:
> On Mon, Nov 19, 2018 at 11:11 AM Manivannan Sadhasivam
> <manivannan.sadhasivam@...aro.org> wrote:
> >
> > Add initial device tree for RDA8810PL SoC from RDA Microelectronics.
> >
> > Signed-off-by: Andreas Färber <afaerber@...e.de>
> > Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@...aro.org>
> > ---
> > arch/arm/boot/dts/rda8810pl.dtsi | 95 ++++++++++++++++++++++++++++++++
> > 1 file changed, 95 insertions(+)
> > create mode 100644 arch/arm/boot/dts/rda8810pl.dtsi
> >
> > diff --git a/arch/arm/boot/dts/rda8810pl.dtsi b/arch/arm/boot/dts/rda8810pl.dtsi
> > new file mode 100644
> > index 000000000000..7f1ff2021eff
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/rda8810pl.dtsi
> > @@ -0,0 +1,95 @@
> > +/*
> > + * RDA8810PL SoC
> > + *
> > + * Copyright (c) 2017 Andreas Färber
> > + * Copyright (c) 2018 Manivannan Sadhasivam
> > + *
> > + * SPDX-License-Identifier: (GPL-2.0+ OR MIT)
>
> Goes on 1st line. checkpatch.pl will tell you this.
>
Ack.
> > + */
> > +
> > +/ {
> > + compatible = "rda,8810pl";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > +
> > + aliases {
> > + serial0 = &uart0;
> > + serial1 = &uart1;
> > + serial2 = &uart2;
> > + };
> > +
> > + cpus {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + cpu@0 {
> > + device_type = "cpu";
> > + compatible = "arm,cortex-a5";
> > + reg = <0x0>;
> > + };
> > + };
> > +
> > + soc {
>
> soc@0
>
Ack.
> > + compatible = "simple-bus";
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0x0 0x0 0x80000000>;
> > +
> > + sram@...000 {
> > + compatible = "mmio-sram";
> > + reg = <0x100000 0x10000>;
>
> Based on the address of this and everything else, perhaps you should
> move this to the top-level (or another bus node) and then either get
> rid of the soc node level or make it start at 0x20000000. Kind of
> depends on what the rest of the memory map looks like.
>
Okay. Will move sram node to top level and make soc reg address start
from 0x20000000.
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges;
> > + };
> > +
> > + apb@...00000 {
> > + compatible = "simple-bus";
> > + reg = <0x20800000 0x100000>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0x0 0x20800000 0x100000>;
> > + };
> > +
> > + apb@...00000 {
> > + compatible = "simple-bus";
> > + reg = <0x20900000 0x100000>;
>
> By definition of a simple-bus, it should not have any registers. Or
> you should also have a specific compatible.
>
Okay, will remove the reg property.
Thanks,
Mani
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0x0 0x20900000 0x100000>;
> > + };
> > +
> > + apb@...00000 {
> > + compatible = "simple-bus";
> > + reg = <0x20a00000 0x100000>;
> > + #address-cells = <1>;
> > + #size-cells = <1>;
> > + ranges = <0x0 0x20a00000 0x100000>;
> > +
> > + uart0: serial@0 {
> > + compatible = "rda,8810pl-uart";
> > + reg = <0x0 0x1000>;
> > + status = "disabled";
> > + };
> > +
> > + uart1: serial@...00 {
> > + compatible = "rda,8810pl-uart";
> > + reg = <0x10000 0x1000>;
> > + status = "disabled";
> > + };
> > +
> > + uart2: serial@...00 {
> > + compatible = "rda,8810pl-uart";
> > + reg = <0x90000 0x1000>;
> > + status = "disabled";
> > + };
> > + };
> > +
> > + l2: cache-controller@...00000 {
> > + compatible = "arm,pl310-cache";
> > + reg = <0x21100000 0x1000>;
> > + cache-unified;
> > + cache-level = <2>;
> > + };
> > + };
> > +};
> > --
> > 2.17.1
> >
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