linux-kernel - Re: [PATCH] rtc: hym8563: enable wakeup by default

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Message-ID: <20201105220938.GG1034841@piout.net>
Date:   Thu, 5 Nov 2020 23:09:38 +0100
From:   Alexandre Belloni <alexandre.belloni@...tlin.com>
To:     Guillaume Tucker <guillaume.tucker@...labora.com>
Cc:     Alessandro Zummo <a.zummo@...ertech.it>,
        Heiko Stuebner <heiko@...ech.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        linux-rtc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kernel@...labora.com
Subject: Re: [PATCH] rtc: hym8563: enable wakeup by default

On 05/11/2020 22:01:10+0000, Guillaume Tucker wrote:
> Enable wakeup by default in the hym8563 driver to match the behaviour
> implemented by the majority of RTC drivers.  As per the description of
> device_init_wakeup(), it should be enabled for "devices that everyone
> expects to be wakeup sources".  One would expect this to be the case
> with a real-time clock.
> 

Actually, the proper way of doing it for a discrete RTC is to only
enable wakeup if the irq request is successful or when the wakeup-source
property is present on the node.

> Fixes: dcaf03849352 ("rtc: add hym8563 rtc-driver")
> Reported-by: kernelci.org bot <bot@...nelci.org>
> Signed-off-by: Guillaume Tucker <guillaume.tucker@...labora.com>
> ---
>  drivers/rtc/rtc-hym8563.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
> index 0fb79c4afb46..6fccfe634d57 100644
> --- a/drivers/rtc/rtc-hym8563.c
> +++ b/drivers/rtc/rtc-hym8563.c
> @@ -527,7 +527,7 @@ static int hym8563_probe(struct i2c_client *client,
>  	hym8563->client = client;
>  	i2c_set_clientdata(client, hym8563);
>  
> -	device_set_wakeup_capable(&client->dev, true);
> +	device_init_wakeup(&client->dev, true);
>  
>  	ret = hym8563_init_device(client);
>  	if (ret) {
> -- 
> 2.20.1
> 

-- 
Alexandre Belloni, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com