linux-kernel - Re: [PATCH] rtc: tegra: Add ACPI support

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Message-ID: <e03ab196-c204-4e2f-b69e-400b464e3d21@nvidia.com>
Date: Tue, 21 Oct 2025 12:06:56 +0530
From: Kartik Rajput <kkartik@...dia.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc: alexandre.belloni@...tlin.com, thierry.reding@...il.com,
 jonathanh@...dia.com, linux-rtc@...r.kernel.org,
 linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] rtc: tegra: Add ACPI support

Hi Andy,

Thanks for reviewing the patch!

On 15/10/25 13:34, Andy Shevchenko wrote:
> External email: Use caution opening links or attachments
> 
> 
> On Fri, Sep 19, 2025 at 04:42:32PM +0530, Kartik Rajput wrote:
>> Add ACPI support for Tegra RTC, which is available on Tegra241 and
>> Tegra410. Both Tegra241 and Tegra410 use the same ACPI ID 'NVDA0280'.
>> The RTC clock is configured by UEFI before the kernel boots.
> 
> ...
> 
>> +#include <linux/acpi.h>
> 
> No use.
> 

Ack.

> ...
> 
>> +static const struct acpi_device_id tegra_rtc_acpi_match[] = {
>> +     { "NVDA0280", 0 },
> 
> Drop redundant ', 0' part.
> 

Ack.

>> +     { }
>> +};
> 
> ...
> 
>> +     if (is_of_node(dev_fwnode(&pdev->dev))) {
> 
> Simple dev_of_node() will work here
> 

Ack.

>> +             info->clk = devm_clk_get(&pdev->dev, NULL);
>> +             if (IS_ERR(info->clk))
>> +                     return PTR_ERR(info->clk);
>>
>> +             ret = clk_prepare_enable(info->clk);
>> +             if (ret < 0)
>> +                     return ret;
>> +     }
> 
> ...
> 
>>   disable_clk:
>> -     clk_disable_unprepare(info->clk);
>> +     if (is_of_node(dev_fwnode(&pdev->dev)))
>> +             clk_disable_unprepare(info->clk);
> 
> Redundant change. CLK APIs are NULL aware.
> 

Ack. I will drop this check.

> ...
> 
>> -     clk_disable_unprepare(info->clk);
>> +     if (is_of_node(dev_fwnode(&pdev->dev)))
>> +             clk_disable_unprepare(info->clk);
> 
> Ditto.
> 

Ack.

> --
> With Best Regards,
> Andy Shevchenko
> 
> 

Thanks,
Kartik