linux-kernel - RE: [EXT] Re: [PATCH 1/2] dt-bindings: watchdog: marvell octeonTX2 GTI system atchdog driver

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Message-ID: <DM5PR1801MB188392419EA5CD976986B085E3999@DM5PR1801MB1883.namprd18.prod.outlook.com>
Date:   Fri, 14 Apr 2023 11:34:36 +0000
From:   Bharat Bhushan <bbhushan2@...vell.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        "wim@...ux-watchdog.org" <wim@...ux-watchdog.org>,
        "linux@...ck-us.net" <linux@...ck-us.net>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "krzysztof.kozlowski+dt@...aro.org" 
        <krzysztof.kozlowski+dt@...aro.org>,
        "linux-watchdog@...r.kernel.org" <linux-watchdog@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCH 1/2] dt-bindings: watchdog: marvell octeonTX2
 GTI system atchdog driver

Please see inline 

> -----Original Message-----
> From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> Sent: Friday, April 14, 2023 5:02 PM
> To: Bharat Bhushan <bbhushan2@...vell.com>; wim@...ux-watchdog.org;
> linux@...ck-us.net; robh+dt@...nel.org; krzysztof.kozlowski+dt@...aro.org;
> linux-watchdog@...r.kernel.org; devicetree@...r.kernel.org; linux-
> kernel@...r.kernel.org
> Subject: Re: [EXT] Re: [PATCH 1/2] dt-bindings: watchdog: marvell octeonTX2 GTI
> system atchdog driver
> 
> On 14/04/2023 13:29, Bharat Bhushan wrote:
> 
> >
> >>
> >>> +
> >>> +examples:
> >>> +  - |
> >>> +    soc {
> >>> +        #address-cells = <2>;
> >>> +        #size-cells = <2>;
> >>> +
> >>> +        watchdog@...000040000 {
> >>> +          compatible = "marvell-octeontx2-wdt";
> >>> +          reg = <0x8020 0x40000 0x0 0x20000>;
> >>
> >> Are you sure that this is correct DTS? 32-bit numbers are usually
> >> 8-digit long. Plus size of 0x20000 is crazy huge. And the unit
> >> address is a bit unusual. Are you sure dtc W=1 does not say about any errors in
> your DTS?
> >
> > Each cell is 32bit, so if we specify less than upper values becomes zeros (0s).
> 
> ... and what is the convention/coding style of your subarch? Is to have short or 0-
> padded reg addresses?
> 
> Anyway, I have doubts this was tested, so please confirm that dtbs W=1 and
> dtbs_check produce no errors on your DTS. BTW, where is the DTS?

Our device tree are part of firmware and not in Linux. I will check if dtb compilation used "W=1" flag.
With this device tree node driver works expectedly.

Thanks
-Bharat

> 
> Best regards,
> Krzysztof