linux-kernel - Re: [PATCH] arm64: configs: Enable GPIO

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Message-ID: <f32dc8da-7c17-6cb4-be31-53a59b7cea35@ti.com>
Date:   Wed, 12 Jun 2019 07:14:54 +0530
From:   keerthy <j-keerthy@...com>
To:     Tero Kristo <t-kristo@...com>, <will.deacon@....com>,
        <catalin.marinas@....com>, <shawnguo@...nel.org>
CC:     <lokeshvutla@...com>, <nm@...com>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: configs: Enable GPIO_DAVINCI



On 6/11/2019 11:49 PM, Tero Kristo wrote:
> On 05/06/2019 09:14, Keerthy wrote:
>> Enable GPIO_DAVINCI and related configs for TI K3 AM6 platforms.
>>
>> Signed-off-by: Keerthy <j-keerthy@...com>
>> ---
>>   arch/arm64/configs/defconfig | 3 +++
>>   1 file changed, 3 insertions(+)
>>
>> diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
>> index d1b72f99e2f4..57d7a4c207bd 100644
>> --- a/arch/arm64/configs/defconfig
>> +++ b/arch/arm64/configs/defconfig
>> @@ -385,6 +385,9 @@ CONFIG_PINCTRL_QCS404=y
>>   CONFIG_PINCTRL_QDF2XXX=y
>>   CONFIG_PINCTRL_QCOM_SPMI_PMIC=y
>>   CONFIG_PINCTRL_SDM845=y
>> +CONFIG_DEBUG_GPIO=y
> 
> Why DEBUG_GPIO?

Okay this can be left out.

> 
>> +CONFIG_GPIO_SYSFS=y
> 
> Also, why GPIO_SYSFS?

This has been there for pretty much all the SoCs in the past
and one of the ways to validate GPIOs are functional. This is very much 
needed IMHO.

> 
> Both of the above are nice for debugging purposes, but should not be 
> enabled by default imho, as they are not needed by drivers.
> 
>> +CONFIG_GPIO_DAVINCI=y
> 
> I think you should not modify defconfig, rather add these as platform 
> required features under arch/arm64/Kconfig.platforms?

I observed CONFIG_RESET_TI_SCI, CONFIG_TI_SCI_PROTOCOL which are 
platform specific in the defconfig and added them here. Already there 
are n number of GPIO config options as well under defconfig. If the norm 
is to add selects under arch/arm64/Kconfig.platforms then i am fine with 
that as well. Kindly let me know.

- Keerthy
> 
> -Tero
> 
>>   CONFIG_GPIO_DWAPB=y
>>   CONFIG_GPIO_MB86S7X=y
>>   CONFIG_GPIO_PL061=y
>>
> 
> -- 
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. 
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