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Date: Thu, 26 Sep 2013 11:37:33 -0500
From: Kumar Gala <galak@...eaurora.org>
To: Rohit Vaswani <rvaswani@...eaurora.org>
Cc: David Brown <davidb@...eaurora.org>,
Rob Herring <rob.herring@...xeda.com>,
Pawel Moll <pawel.moll@....com>,
Mark Rutland <mark.rutland@....com>,
Stephen Warren <swarren@...dotorg.org>,
Ian Campbell <ian.campbell@...rix.com>,
Russell King <linux@....linux.org.uk>,
Daniel Walker <dwalker@...o99.com>,
Bryan Huntsman <bryanh@...eaurora.org>,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org
Subject: Re: [PATCHv4 2/3] ARM: msm: Add support for APQ8074 Dragonboard
On Sep 25, 2013, at 5:35 PM, Rohit Vaswani wrote:
> On 9/25/2013 12:49 PM, Kumar Gala wrote:
>> On Sep 23, 2013, at 10:13 PM, Rohit Vaswani wrote:
>>
>>> This patch adds basic board support for APQ8074 Dragonboard
>>> which belongs to the Snapdragon 800 family.
>>> For now, just support a basic machine with device tree.
>>>
>>> Signed-off-by: Rohit Vaswani <rvaswani@...eaurora.org>
>>> ---
>>> arch/arm/Kconfig.debug | 9 +++++++
>>> arch/arm/boot/dts/Makefile | 3 ++-
>>> arch/arm/boot/dts/qcom-apq8074-dragonboard.dts | 6 +++++
>>> arch/arm/boot/dts/qcom-msm8974.dtsi | 35 ++++++++++++++++++++++++++
>>> arch/arm/include/debug/msm.S | 5 ++++
>>> arch/arm/mach-msm/Kconfig | 13 ++++++++++
>>> arch/arm/mach-msm/board-dt.c | 9 +++++++
>>> 7 files changed, 79 insertions(+), 1 deletion(-)
>>> create mode 100644 arch/arm/boot/dts/qcom-apq8074-dragonboard.dts
>>> create mode 100644 arch/arm/boot/dts/qcom-msm8974.dtsi
>>>
>>> diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
>>> index e18a6fc..959b2c7 100644
>>> --- a/arch/arm/Kconfig.debug
>>> +++ b/arch/arm/Kconfig.debug
>>> @@ -357,6 +357,15 @@ choice
>>> Say Y here if you want the debug print routines to direct
>>> their output to the serial port on MSM 8960 devices.
>>>
>>> + config DEBUG_MSM8974_UART
>>> + bool "Kernel low-level debugging messages via MSM 8974 UART"
>>> + depends on ARCH_MSM8974
>>> + select MSM_HAS_DEBUG_UART_HS
>>> + select DEBUG_MSM_UART
>>> + help
>>> + Say Y here if you want the debug print routines to direct
>>> + their output to the serial port on MSM 8974 devices.
>>> +
>> A little surprised you didn't pull this and the ARCH_MSM8974 into its own patch outside of this patch being board support.
>
> Well, its good to have this as part of initial board setup for earlyprintk.
I agree, just figured it would have been a standalone patch and a precursor to this patch.
>>> config DEBUG_MVEBU_UART
>>> bool "Kernel low-level debugging messages via MVEBU UART (old bootloaders)"
>>> depends on ARCH_MVEBU
>>> diff --git a/arch/arm/boot/dts/Makefile b/arch/arm/boot/dts/Makefile
>>> index 000cf76..e71a3ec 100644
>>> --- a/arch/arm/boot/dts/Makefile
>>> +++ b/arch/arm/boot/dts/Makefile
>>> @@ -102,7 +102,8 @@ dtb-$(CONFIG_ARCH_KIRKWOOD) += kirkwood-cloudbox.dtb \
>>> kirkwood-openblocks_a6.dtb
>>> dtb-$(CONFIG_ARCH_MARCO) += marco-evb.dtb
>>> dtb-$(CONFIG_ARCH_MSM) += msm8660-surf.dtb \
>>> - msm8960-cdp.dtb
>>> + msm8960-cdp.dtb \
>>> + qcom-apq8074-dragonboard.dtb
>>> dtb-$(CONFIG_ARCH_MVEBU) += armada-370-db.dtb \
>>> armada-370-mirabox.dtb \
>>> armada-370-netgear-rn102.dtb \
>>> diff --git a/arch/arm/boot/dts/qcom-apq8074-dragonboard.dts b/arch/arm/boot/dts/qcom-apq8074-dragonboard.dts
>>> new file mode 100644
>>> index 0000000..bb6f3c4
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/qcom-apq8074-dragonboard.dts
>>> @@ -0,0 +1,6 @@
>>> +/include/ "qcom-msm8974.dtsi"
>>> +
>>> +/ {
>>> + model = "Qualcomm APQ8074 Dragonboard";
>>> + compatible = "qcom,apq8074-dragonboard", "qcom,apq8074";
>>> +};
>>> diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
>>> new file mode 100644
>>> index 0000000..f04b643
>>> --- /dev/null
>>> +++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
>>> @@ -0,0 +1,35 @@
>>> +/dts-v1/;
>>> +
>>> +/include/ "skeleton.dtsi"
>>> +
>>> +/ {
>>> + model = "Qualcomm MSM8974";
>>> + compatible = "qcom,msm8974";
>>> + interrupt-parent = <&intc>;
>>> +
>>> + soc: soc { };
>> We should have a unit address here:
>>
>> soc: soc@...BAR {
>>
>> also, split out the curly braces so any future patches do have to muck with that.
>>
>> };
>>
>
> Im not sure I understand the reasoning behind the unit address for soc ?
Its fairly standard practice and there is a fair amount of discussion about the lack of a unit address for memory nodes.
>>> +};
>>> +
>>> +&soc {
>>> + #address-cells = <1>;
>>> + #size-cells = <1>;
>>> + ranges;
>>> + compatible = "simple-bus";
>>> +
>>> + intc: interrupt-controller@...00000 {
>>> + compatible = "qcom,msm-qgic2";
>>> + interrupt-controller;
>>> + #interrupt-cells = <3>;
>>> + reg = <0xf9000000 0x1000>,
>>> + <0xf9002000 0x1000>;
>>> + };
>>> +
>>> + timer {
>>> + compatible = "arm,armv7-timer";
>>> + interrupts = <1 2 0xf08>,
>>> + <1 3 0xf08>,
>>> + <1 4 0xf08>,
>>> + <1 1 0xf08>;
>>> + clock-frequency = <19200000>;
>>> + };
>>> +};
- k
--
Employee of Qualcomm Innovation Center, Inc.
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation
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