linux-kernel - Re: [PATCH 1/2] watchdog: simatic-ipc-wdt: make IO region access of one model muxed

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Date:   Mon, 10 Jul 2023 06:45:14 -0700
From:   Guenter Roeck <linux@...ck-us.net>
To:     Hans de Goede <hdegoede@...hat.com>
Cc:     Henning Schild <henning.schild@...mens.com>,
        Mark Gross <markgross@...nel.org>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org,
        Wim Van Sebroeck <wim@...ux-watchdog.org>,
        Jean Delvare <jdelvare@...e.com>,
        linux-watchdog@...r.kernel.org, linux-hwmon@...r.kernel.org,
        Tobias Schaffner <tobias.schaffner@...mens.com>,
        Gerd Haeussler <gerd.haeussler.ext@...mens.com>
Subject: Re: [PATCH 1/2] watchdog: simatic-ipc-wdt: make IO region access of
 one model muxed

On Mon, Jul 10, 2023 at 03:33:45PM +0200, Hans de Goede wrote:
> Hi Guenter,
> 
> On 7/6/23 18:03, Guenter Roeck wrote:
> > On 7/6/23 08:48, Henning Schild wrote:
> >> The IO region used for the watchdog also hold CMOS battery monitoring
> >> information. Make the access muxed so that a hwmon driver can use the
> >> region as well.
> >>
> >> Signed-off-by: Henning Schild <henning.schild@...mens.com>
> > 
> > Acked-by: Guenter Roeck <linux@...ck-us.net>
> 
> Thank you. Is it ok if I pick up his patch and merge it together with 2/2
> through the pdx86 tree ?
> 

Yes. That was my assumption.

Guenter

> Regards,
> 
> Hans
> 
> 
> > 
> >> ---
> >>   drivers/watchdog/simatic-ipc-wdt.c | 9 ++++++---
> >>   1 file changed, 6 insertions(+), 3 deletions(-)
> >>
> >> diff --git a/drivers/watchdog/simatic-ipc-wdt.c b/drivers/watchdog/simatic-ipc-wdt.c
> >> index 6599695dc672..cdc1a2e15180 100644
> >> --- a/drivers/watchdog/simatic-ipc-wdt.c
> >> +++ b/drivers/watchdog/simatic-ipc-wdt.c
> >> @@ -155,9 +155,8 @@ static int simatic_ipc_wdt_probe(struct platform_device *pdev)
> >>         switch (plat->devmode) {
> >>       case SIMATIC_IPC_DEVICE_227E:
> >> -        if (!devm_request_region(dev, gp_status_reg_227e_res.start,
> >> -                     resource_size(&gp_status_reg_227e_res),
> >> -                     KBUILD_MODNAME)) {
> >> +        res = &gp_status_reg_227e_res;
> >> +        if (!request_muxed_region(res->start, resource_size(res), res->name)) {
> >>               dev_err(dev,
> >>                   "Unable to register IO resource at %pR\n",
> >>                   &gp_status_reg_227e_res);
> >> @@ -210,6 +209,10 @@ static int simatic_ipc_wdt_probe(struct platform_device *pdev)
> >>       if (wdd_data.bootstatus)
> >>           dev_warn(dev, "last reboot caused by watchdog reset\n");
> >>   +    if (plat->devmode == SIMATIC_IPC_DEVICE_227E)
> >> +        release_region(gp_status_reg_227e_res.start,
> >> +                   resource_size(&gp_status_reg_227e_res));
> >> +
> >>       watchdog_set_nowayout(&wdd_data, nowayout);
> >>       watchdog_stop_on_reboot(&wdd_data);
> >>       return devm_watchdog_register_device(dev, &wdd_data);
> > 
>