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Message-ID: <ec3f5d8a-ac38-1134-93a3-c4ceb8b944e0@omp.ru>
Date: Tue, 23 Jan 2024 23:43:02 +0300
From: Sergey Shtylyov <s.shtylyov@....ru>
To: Claudiu <claudiu.beznea@...on.dev>, <davem@...emloft.net>,
<edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
<richardcochran@...il.com>, <p.zabel@...gutronix.de>,
<geert+renesas@...der.be>
CC: <netdev@...r.kernel.org>, <linux-renesas-soc@...r.kernel.org>,
<linux-kernel@...r.kernel.org>, Claudiu Beznea
<claudiu.beznea.uj@...renesas.com>
Subject: Re: [PATCH net-next v4 07/15] net: ravb: Move reference clock
enable/disable on runtime PM APIs
On 1/23/24 3:58 PM, Claudiu wrote:
> From: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
>
> Reference clock could be or not part of the power domain. If it is part of
Could be or not be, perhaps?
> the power domain, the power domain takes care of propertly setting it. In
Properly. :-)
> case it is not part of the power domain and full runtime PM support is
> available in driver the clock will not be propertly disabled/enabled at
> runtime. For this, keep the prepare/unprepare operations in the driver's
> probe()/remove() functions and move the enable/disable in runtime PM
> functions.
>
> Along with it, the other clock request operations were moved close to
> reference clock request and prepare to have all the clock requests
> specific code grouped together.
>
> Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@...renesas.com>
[...]
> diff --git a/drivers/net/ethernet/renesas/ravb_main.c b/drivers/net/ethernet/renesas/ravb_main.c
> index 9fc0e39e33c2..4673cc2faec0 100644
> --- a/drivers/net/ethernet/renesas/ravb_main.c
> +++ b/drivers/net/ethernet/renesas/ravb_main.c
[...]
> @@ -3060,21 +3058,27 @@ static int ravb_resume(struct device *dev)
> return ret;
> }
>
> -static int ravb_runtime_nop(struct device *dev)
> +static int ravb_runtime_suspend(struct device *dev)
> {
> - /* Runtime PM callback shared between ->runtime_suspend()
> - * and ->runtime_resume(). Simply returns success.
> - *
> - * This driver re-initializes all registers after
> - * pm_runtime_get_sync() anyway so there is no need
> - * to save and restore registers here.
> - */
I want to pull out the dummy {ravb|sh_eth}_runtime_nop() funcs --
they don't seem to be necessary... Then we can implement your clock
dance with freshly added ravb_runtime_{suspend|resume}()...
[...]
MBR, Sergey
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