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

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Message-ID: <4a11393d-69bb-8e9d-3bfe-21aa7a7fb1e3@redhat.com>
Date:   Mon, 10 Jul 2023 15:33:45 +0200
From:   Hans de Goede <hdegoede@...hat.com>
To:     Guenter Roeck <linux@...ck-us.net>,
        Henning Schild <henning.schild@...mens.com>,
        Mark Gross <markgross@...nel.org>,
        linux-kernel@...r.kernel.org, platform-driver-x86@...r.kernel.org
Cc:     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

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 ?

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);
>