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Message-ID: <ece192bc-adee-4d99-9fc2-c133f1402cae@linaro.org>
Date: Tue, 26 Mar 2024 11:10:14 +0100
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Subject: Re: [PATCH 2/2] ARM: dts: qcom: Add support for Motorola Moto G
 (2013)
To: Stanislav Jakubek <stano.jakubek@gmail.com>
Cc: Bjorn Andersson <andersson@kernel.org>, Rob Herring <robh@kernel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
 Conor Dooley <conor+dt@kernel.org>, linux-arm-msm@vger.kernel.org,
 devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 phone-devel@vger.kernel.org, linux-kernel@vger.kernel.org
References: <f5d4d71cd59f25b80889ef88fa044aa3a4268d46.1711288736.git.stano.jakubek@gmail.com>
 <b35ad5ff8a13f9df415b6e6700b3b5d3f13bfce8.1711288736.git.stano.jakubek@gmail.com>
 <ffa93b4a-608a-4cf5-b111-0d1f8520afdd@linaro.org>
 <ZgHdoK6luxRcKgRx@standask-GA-A55M-S2HP>
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From: Konrad Dybcio <konrad.dybcio@linaro.org>
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In-Reply-To: <ZgHdoK6luxRcKgRx@standask-GA-A55M-S2HP>
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On 25.03.2024 9:25 PM, Stanislav Jakubek wrote:
> On Mon, Mar 25, 2024 at 08:28:27PM +0100, Konrad Dybcio wrote:
>> On 24.03.2024 3:04 PM, Stanislav Jakubek wrote:
>>> Add a device tree for the Motorola Moto G (2013) smartphone based
>>> on the Qualcomm MSM8226 SoC.
>>>
>>> Initially supported features:
>>>   - Buttons (Volume Down/Up, Power)
>>>   - eMMC
>>>   - Hall Effect Sensor
>>>   - SimpleFB display
>>>   - TMP108 temperature sensor
>>>   - Vibrator
>>>
>>> Signed-off-by: Stanislav Jakubek <stano.jakubek@gmail.com>
>>> ---
>>
>> [...]
>>
>>> +		hob-ram@f500000 {
>>> +			reg = <0x0f500000 0x40000>,
>>> +			      <0x0f540000 0x2000>;
>>> +			no-map;
>>> +		};
>>
>> Any reason it's in two parts? Should it be one contiguous region, or
>> two separate nodes?
>>
>> lgtm otherwise
> 
> Hi Konrad, I copied this from downstream as-is.
> According to the downstream docs [1]:
> 
> HOB RAM MMAP Device provides ability for userspace to access the
> hand over block memory to read out modem related parameters.
> 
> And the two regs are the "DHOB partition" and "SHOB partition".

Oh right, motorola made some inventions here..

> 
> I suppose this is something Motorola (firmware?) specific (since the
> downstream compatible is mmi,hob_ram [2]).
> Should I split this into 2 nodes - dhob@f500000 and shob@f540000?

Yes please and add the downstream txt link to the commit message in case
somebody was curious down the line.

Konrad