linux-kernel - Re: [PATCH v2 0/3] ARM: dts: meson: add the APB/APB2 busses

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Message-ID: <7himywqbck.fsf@baylibre.com>
Date:   Thu, 10 Jan 2019 16:36:27 -0800
From:   Kevin Hilman <khilman@...libre.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        linux-amlogic@...ts.infradead.org
Cc:     devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v2 0/3] ARM: dts: meson: add the APB/APB2 busses

Neil Armstrong <narmstrong@...libre.com> writes:

> On 08/12/2018 17:50, Martin Blumenstingl wrote:
>> This adds the APB bus on Meson8 and Meson8b as well as the APB2 bus on
>> Meson6. This is preparation work for adding the Mali GPU which is
>> located on theses busses.
>> 
>> Meson6 seems to have it's APB at 0xc8000000 instead of 0xd0000000. The
>> region at 0xd0000000 is called APB2 or A9_APB and it has a different
>> size (256k) compared to Meson8 and Meson8b (2M).
>> 
>> Addresses and sizes are taken from the Amlogic 3.10 kernel sources:
>> - Meson6: [0]
>> - Meson8: [1]
>> - Meson8b: [2]
>> 
>> 
>> Changes since v1 at [3]:
>> - re-send the patches but this time don't include the old patches
>>   which still had a typo in the patch description (ABP vs APB)
>> 
>> 
>> [0] https://github.com/endlessm/linux-meson/blob/cd4096c3ff4eb5b8a8a5581bb46508601c5470dc/arch/arm/mach-meson6/include/mach/io.h#L61
>> [1] https://github.com/endlessm/linux-meson/blob/cd4096c3ff4eb5b8a8a5581bb46508601c5470dc/arch/arm/mach-meson8/include/mach/io.h#L53
>> [2] https://github.com/endlessm/linux-meson/blob/cd4096c3ff4eb5b8a8a5581bb46508601c5470dc/arch/arm/mach-meson8b/include/mach/io.h#L53
>> [3] http://lists.infradead.org/pipermail/linux-amlogic/2018-December/009424.html
>> 
>> 
>> Martin Blumenstingl (3):
>>   ARM: dts: meson6: add the APB2 bus
>>   ARM: dts: meson8: add the APB bus
>>   ARM: dts: meson8b: add the APB bus
>> 
>>  arch/arm/boot/dts/meson6.dtsi  | 8 ++++++++
>>  arch/arm/boot/dts/meson8.dtsi  | 8 ++++++++
>>  arch/arm/boot/dts/meson8b.dtsi | 8 ++++++++
>>  3 files changed, 24 insertions(+)
>> 
>
> Reviewed-by: Neil Armstrong <narmstrong@...libre.com>
>
> But frankly I'll squash the meson8/meson8b patches with the mali node patches !

In general, I agree with Neil.  Adding the new busses along with the
series that uses them would be fine, but I don't have a strong
preference.

So queueing this series as is for v5.1 (branch: v5.1/dt)

Kevin