linux-kernel - Re: [PATCH] ARM: at91: pm: change BU Power Switch to automatic mode

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Message-ID: <af867f52-37f9-4caa-ab6e-8d7e409bbc87@microchip.com>
Date: Mon, 9 Dec 2024 09:15:45 +0100
From: Nicolas Ferre <nicolas.ferre@...rochip.com>
To: Claudiu Beznea <claudiu.beznea@...on.dev>, Alexandre Belloni
	<alexandre.belloni@...tlin.com>
CC: <linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	Cristian Birsan <cristian.birsan@...rochip.com>
Subject: Re: [PATCH] ARM: at91: pm: change BU Power Switch to automatic mode

On 08/12/2024 at 16:48, Claudiu Beznea wrote:
> On 25.11.2024 18:56, nicolas.ferre@...rochip.com wrote:
>> From: Nicolas Ferre <nicolas.ferre@...rochip.com>
>>
>> Change how the Backup Unit Power is configured and force the
>> automatic/hardware mode.
>> This change eliminates the need for software management of the power
>> switch, ensuring it transitions to the backup power source before
>> entering low power modes.
>>
>> This is done in the only locaton where this swich was configured. It's
>> usually done in the bootloader.
>>
>> Previously, the loss of the VDDANA (or VDDIN33) power source was not
>> automatically compensated by an alternative power source. This resulted
>> in the loss of Backup Unit content, including Backup Self-refresh low
>> power mode information, OTP emulation configuration, and boot
>> configuration, for instance.
>>
>> Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
> 
> I've added the fixes tag, s/locaton/location, s/swich/switch.

Thanks for your help Claudiu. Regards,
   Nicolas
> 
> Applied to at91-soc, thanks!