linux-kernel - Re: [PATCH] tty: serial: samsung: Set missing PM ops for hibernation support

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Message-ID: <01a3c57a-bef4-9a9e-3f8b-0231653232a8@axis.com>
Date:   Wed, 9 Aug 2023 15:19:27 +0200
From:   Anton Eliasson <anton.eliasson@...s.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Alim Akhtar <alim.akhtar@...sung.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Jiri Slaby <jirislaby@...nel.org>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-samsung-soc@...r.kernel.org>,
        <linux-serial@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...s.com>
Subject: Re: [PATCH] tty: serial: samsung: Set missing PM ops for hibernation
 support

On 07/08/2023 15.50, Krzysztof Kozlowski wrote:
> On 03/08/2023 13:26, Anton Eliasson wrote:
>> At least freeze, restore and thaw need to be set in order for the driver
>> to support system hibernation. The existing suspend/resume functions can
>> be reused since those functions don't touch the device's power state or
>> wakeup capability. Use the helper macros SET_SYSTEM_SLEEP_PM_OPS and
>> SET_NOIRQ_SYSTEM_SLEEP_PM_OPS for symmetry with similar drivers.
>>
> Looks sensible, although you should also test the other sleep methods,
> e.g. suspend to idle.
>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>
> Best regards,
> Krzysztof
>
Yes, s2idle still works. Standby / Power-On Suspend and s2ram we don't 
have support for so I can't test it. Thanks for the review!


Anton Eliasson