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Date:	Sat, 8 Nov 2014 16:22:47 -0800
From:	Olof Johansson <olof@...om.net>
To:	Scott Branden <sbranden@...adcom.com>
Cc:	Christian Daudt <bcm@...thebug.org>,
	Matt Porter <mporter@...aro.org>,
	Russell King <linux@....linux.org.uk>,
	Broadcom Kernel Feedback List 
	<bcm-kernel-feedback-list@...adcom.com>,
	Mike Turquette <mturquette@...aro.org>,
	Alex Elder <elder@...aro.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Mark Rutland <mark.rutland@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"David S. Miller" <davem@...emloft.net>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Joe Perches <joe@...ches.com>,
	Mauro Carvalho Chehab <m.chehab@...sung.com>,
	Antti Palosaari <crope@....fi>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Ray Jui <rjui@...adcom.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	JD Zheng <jdzheng@...adcom.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH v8 4/8] ARM: dts: Enable Broadcom Cygnus SoC

Hi,

A bunch of small comments below, should be quick to fix.

On Tue, Oct 28, 2014 at 12:53 PM, Scott Branden <sbranden@...adcom.com> wrote:
> DT files to enable cygnus consisting on reference designs
> and cygnus core configuration.
>
> Reviewed-by: Ray Jui <rjui@...adcom.com>
> Reviewed-by: Arun Parameswaran <aparames@...adcom.com>
> Tested-by: Jonathan Richardson <jonathar@...adcom.com>
> Reviewed-by: JD (Jiandong) Zheng <jdzheng@...adcom.com>
> Signed-off-by: Scott Branden <sbranden@...adcom.com>
> ---
>  arch/arm/boot/dts/Makefile              |    4 ++
>  arch/arm/boot/dts/bcm-cygnus-clock.dtsi |   73 ++++++++++++++++++++++
>  arch/arm/boot/dts/bcm-cygnus.dtsi       |  100 +++++++++++++++++++++++++++++++
>  arch/arm/boot/dts/bcm911360_entphn.dts  |   32 ++++++++++
>  arch/arm/boot/dts/bcm911360k.dts        |   32 ++++++++++
>  arch/arm/boot/dts/bcm958300k.dts        |   32 ++++++++++
>  6 files changed, 273 insertions(+)
>  create mode 100644 arch/arm/boot/dts/bcm-cygnus-clock.dtsi
>  create mode 100644 arch/arm/boot/dts/bcm-cygnus.dtsi
>  create mode 100644 arch/arm/boot/dts/bcm911360_entphn.dts
>  create mode 100644 arch/arm/boot/dts/bcm911360k.dts
>  create mode 100644 arch/arm/boot/dts/bcm958300k.dts
>
> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
> index 38c89ca..4b3a590 100644
> --- a/arch/arm/boot/dts/Makefile
> +++ b/arch/arm/boot/dts/Makefile
> @@ -54,6 +54,10 @@ dtb-$(CONFIG_ARCH_AT91)      += at91-sama5d4ek.dtb
>  dtb-$(CONFIG_ARCH_ATLAS6) += atlas6-evb.dtb
>  dtb-$(CONFIG_ARCH_AXXIA) += axm5516-amarillo.dtb
>  dtb-$(CONFIG_ARCH_BCM2835) += bcm2835-rpi-b.dtb
> +dtb-$(CONFIG_ARCH_BCM_CYGNUS) += \
> +       bcm911360_entphn.dtb \
> +       bcm911360k.dtb \
> +       bcm958300k.dtb
>  dtb-$(CONFIG_ARCH_BCM_5301X) += bcm4708-netgear-r6250.dtb
>  dtb-$(CONFIG_ARCH_BCM_63XX) += bcm963138dvt.dtb
>  dtb-$(CONFIG_ARCH_BCM_MOBILE) += bcm28155-ap.dtb \

Please add new entries in alphabetical/alphanumerical order. Also,
first entry is commonly added on the first line


> diff --git a/arch/arm/boot/dts/bcm-cygnus-clock.dtsi b/arch/arm/boot/dts/bcm-cygnus-clock.dtsi
> new file mode 100644
> index 0000000..d06172b
> --- /dev/null
> +++ b/arch/arm/boot/dts/bcm-cygnus-clock.dtsi
> @@ -0,0 +1,73 @@
> +/*
> + * Copyright 2014 Broadcom Corporation.  All rights reserved.
> + *
> + * Unless you and Broadcom execute a separate written software license
> + * agreement governing use of this software, this software is licensed to you
> + * under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.

We ask for new DT contents to be added with dual BSD/GPL license, to
allow for reuse of the DT data structures in other projects as well.
There's currently a lot of activity going on relicensing the current
files so I recommend sorting it out before they are added if you can.

> + */
> +
> +clocks {
> +       #address-cells = <1>;
> +       #size-cells = <1>;
> +       ranges;
> +
> +       osc: oscillator {
> +               compatible = "fixed-clock";
> +               #clock-cells = <1>;
> +               clock-frequency = <25000000>;
> +       };
> +
> +       apb_clk: apb_clk {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <1000000000>;
> +       };
> +
> +       periph_clk: periph_clk {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <500000000>;
> +       };
> +
> +       sdio_clk: lcpll_ch2 {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <200000000>;
> +       };
> +
> +       axi81_clk: axi81_clk {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <100000000>;
> +       };
> +
> +       keypad_clk: keypad_clk {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <31806>;
> +       };
> +
> +       adc_clk: adc_clk {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <1562500>;
> +       };
> +
> +       pwm_clk: pwm_clk {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <1000000>;
> +       };
> +
> +       lcd_clk: mipipll_ch1 {
> +               compatible = "fixed-clock";
> +               #clock-cells = <0>;
> +               clock-frequency = <100000000>;
> +       };
> +};
> diff --git a/arch/arm/boot/dts/bcm-cygnus.dtsi b/arch/arm/boot/dts/bcm-cygnus.dtsi
> new file mode 100644
> index 0000000..9c650ab
> --- /dev/null
> +++ b/arch/arm/boot/dts/bcm-cygnus.dtsi
> @@ -0,0 +1,100 @@
> +/*
> + * Copyright 2014 Broadcom Corporation.  All rights reserved.
> + *
> + * Unless you and Broadcom execute a separate written software license
> + * agreement governing use of this software, this software is licensed to you
> + * under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +#include <dt-bindings/interrupt-controller/arm-gic.h>
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +#include "skeleton.dtsi"
> +
> +/ {
> +       compatible = "brcm,cygnus";
> +       model = "Broadcom Cygnus SoC";
> +       interrupt-parent = <&gic>;
> +
> +       cpus {
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +
> +               cpu@0 {
> +                       device_type = "cpu";
> +                       compatible = "arm,cortex-a9";
> +                       next-level-cache = <&L2>;
> +                       reg = <0x0>;
> +               };
> +       };
> +
> +       /include/ "bcm-cygnus-clock.dtsi"
> +
> +       amba {
> +               #address-cells = <1>;
> +               #size-cells = <1>;
> +               compatible = "arm,amba-bus", "simple-bus";
> +               interrupt-parent = <&gic>;
> +               ranges;
> +
> +               wdt@...09000 {
> +                        compatible = "arm,sp805" , "arm,primecell";
> +                        reg = <0x18009000 0x1000>;
> +                        interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
> +                        clocks = <&axi81_clk>;
> +                        clock-names = "apb_pclk";
> +               };
> +       };
> +
> +       uart3: serial@...23000 {
> +               compatible = "snps,dw-apb-uart";
> +               reg = <0x18023000 0x100>;
> +               reg-shift = <2>;
> +               reg-io-width = <4>;
> +               interrupts = <GIC_SPI 76 IRQ_TYPE_LEVEL_HIGH>;
> +               clock-frequency = <100000000>;
> +               clocks = <&axi81_clk>;
> +               status = "okay";

It is common to leave these disabled in the SoC/common dtsi, and
enable them in the per-board dts files, since different boards might
not use all peripherals, etc.

It seems like all your boards currently use both uarts, but if it
changes in the future please consider switching over. It might be
worth doing so now to avoid churn later on. That also allows you to
define all the uards (I'm going to guess that there's a total of at
least 4 on this system :).

> +       };
> +
> +       uart0: serial@...20000 {

These are also out of order, uart3 is before uart0 (and the registers
are in reverse order).

We normally recommend that you add entries sorted by reg/unit address
-- that way there's less risk of conflict due to add/add compared to
if people just append new entries at the end of the file.

> +               compatible = "snps,dw-apb-uart";
> +               reg = <0x18020000 0x100>;
> +               reg-shift = <2>;
> +               reg-io-width = <4>;
> +               interrupts = <GIC_SPI 73 IRQ_TYPE_LEVEL_HIGH>;
> +               clocks = <&axi81_clk>;
> +               clock-frequency = <100000000>;
> +               status = "okay";
> +       };
> +
> +       gic: interrupt-controller@...21000 {
> +               compatible = "arm,cortex-a9-gic";
> +               #interrupt-cells = <3>;
> +               #address-cells = <0>;
> +               interrupt-controller;
> +               reg = <0x19021000 0x1000>,
> +                     <0x19020100 0x100>;
> +       };
> +
> +       L2: l2-cache {

l2-cache@...22000

> +               compatible = "arm,pl310-cache";
> +               reg = <0x19022000 0x1000>;
> +               cache-unified;
> +               cache-level = <2>;
> +       };
> +
> +       timer@...20200 {
> +               compatible = "arm,cortex-a9-global-timer";
> +               reg = <0x19020200 0x100>;
> +               interrupts = <GIC_PPI 11 IRQ_TYPE_LEVEL_HIGH>;
> +               clocks = <&periph_clk>;
> +       };
> +
> +};
> diff --git a/arch/arm/boot/dts/bcm911360_entphn.dts b/arch/arm/boot/dts/bcm911360_entphn.dts
> new file mode 100644
> index 0000000..9de5e87
> --- /dev/null
> +++ b/arch/arm/boot/dts/bcm911360_entphn.dts
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright 2014 Broadcom Corporation.  All rights reserved.
> + *
> + * Unless you and Broadcom execute a separate written software license
> + * agreement governing use of this software, this software is licensed to you
> + * under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +/dts-v1/;
> +
> +#include "bcm-cygnus.dtsi"
> +
> +/ {
> +       model = "Cygnus Enterprise Phone (BCM911360_ENTPHN)";
> +       compatible = "brcm,bcm11360", "brcm,cygnus";
> +
> +       aliases {
> +               serial0 = &uart3;
> +               serial1 = &uart0;
> +       };
> +
> +       chosen {
> +               stdout-path = &uart3;
> +               bootargs = "console=ttyS0,115200";
> +       };
> +};
> diff --git a/arch/arm/boot/dts/bcm911360k.dts b/arch/arm/boot/dts/bcm911360k.dts
> new file mode 100644
> index 0000000..dd4f102
> --- /dev/null
> +++ b/arch/arm/boot/dts/bcm911360k.dts
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright 2014 Broadcom Corporation.  All rights reserved.
> + *
> + * Unless you and Broadcom execute a separate written software license
> + * agreement governing use of this software, this software is licensed to you
> + * under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +/dts-v1/;
> +
> +#include "bcm-cygnus.dtsi"
> +
> +/ {
> +       model = "Cygnus SVK (BCM911360K)";
> +       compatible = "brcm,bcm11360", "brcm,cygnus";
> +
> +       aliases {
> +               serial0 = &uart3;
> +               serial1 = &uart0;
> +       };
> +
> +       chosen {
> +               stdout-path = &uart3;
> +               bootargs = "console=ttyS0,115200";
> +       };
> +};
> diff --git a/arch/arm/boot/dts/bcm958300k.dts b/arch/arm/boot/dts/bcm958300k.dts
> new file mode 100644
> index 0000000..f8b9625
> --- /dev/null
> +++ b/arch/arm/boot/dts/bcm958300k.dts
> @@ -0,0 +1,32 @@
> +/*
> + * Copyright 2014 Broadcom Corporation.  All rights reserved.
> + *
> + * Unless you and Broadcom execute a separate written software license
> + * agreement governing use of this software, this software is licensed to you
> + * under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any
> + * kind, whether express or implied; without even the implied warranty
> + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + * GNU General Public License for more details.
> + */
> +
> +/dts-v1/;
> +
> +#include "bcm-cygnus.dtsi"
> +
> +/ {
> +       model = "Cygnus SVK (BCM958300K)";
> +       compatible = "brcm,bcm58300", "brcm,cygnus";
> +
> +       aliases {
> +               serial0 = &uart3;
> +               serial1 = &uart0;
> +       };
> +
> +       chosen {
> +               stdout-path = &uart3;
> +               bootargs = "console=ttyS0,115200";
> +       };
> +};
> --
> 1.7.9.5
>
>
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> linux-arm-kernel@...ts.infradead.org
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