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Thu, 7 Nov 2019 17:10:45 +0000 From: To: Subject: Re: [PATCH v2 2/2] watchdog: sama5d4_wdt: addition of sam9x60 compatible watchdog Thread-Topic: [PATCH v2 2/2] watchdog: sama5d4_wdt: addition of sam9x60 compatible watchdog Thread-Index: AQHVh+/l2gK286N5pUWI+AtpzaiEg6dxqaQAgA4aiYCAAEA9AIAACEMA Date: Thu, 7 Nov 2019 17:10:45 +0000 Message-ID: References: <1571648890-15140-1-git-send-email-eugen.hristev@microchip.com> <1571648890-15140-2-git-send-email-eugen.hristev@microchip.com> <20191029132831.GA5643@roeck-us.net> <28c6b394-ae88-f913-312e-6b38be1dc5a8@microchip.com> <20191107164104.GA7693@roeck-us.net> In-Reply-To: <20191107164104.GA7693@roeck-us.net> Accept-Language: en-US, ro-RO Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: LO2P265CA0237.GBRP265.PROD.OUTLOOK.COM (2603:10a6:600:b::33) To DM5PR11MB1242.namprd11.prod.outlook.com (2603:10b6:3:14::8) x-ms-exchange-messagesentrepresentingtype: 1 x-tagtoolbar-keys: D20191107191038895 x-originating-ip: [213.41.198.74] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 223a3514-c42e-42b4-8f8f-08d763a56d38 x-ms-traffictypediagnostic: DM5PR11MB1306: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:10000; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 07.11.2019 18:41, Guenter Roeck wrote: > On Thu, Nov 07, 2019 at 12:51:15PM +0000, Eugen.Hristev@microchip.com wrote: >> >>>> >>>> - if ((wdt->mr & AT91_WDT_WDFIEN) && irq) { >>>> + irq = irq_of_parse_and_map(dev->of_node, 0); >>>> + if (!irq) { >>>> + dev_warn(dev, "failed to get IRQ from DT\n"); >>>> + wdt->need_irq = 0; >>> >>> Does it make sense to ignore that ? >> >> Hi Guenter, >> >> Can you detail what exactly is ignored ? >> > The missing interrupt. Hi, The interrupt is not mandatory for the work of the watchdog. So, if it's not available, we must act accordingly: just configure watchdog to reset the CPU. If we have an IRQ, we can then act in the 'software-style' watchdog: trigger an IRQ first and try to allow the system to a safe reboot. So , it's not ignoring, it's acting accordingly (later on, do not enable anything irq-related ) > >>>> +static struct sama5d4_wdt_data sama5d4_config; >>>> + >>>> +static struct sama5d4_wdt_data sam9x60_config = { >>>> + .sam9x60_support = 1, >>>> +}; >>> >>> Unless there is reason to believe that there will be other >>> configuration data, please just assign the flag value directly >>> to .data and add a variable to struct sama5d4_wdt to access it. >>> Please make that variable a bool. >> >> There will be more configuration data for future products, but not at >> this moment. Do the change or keep it this way ? >> > If not as part of this series, it is better to just assign > the flag directly. If there are changes coming at a later time > which indeed need a structure (with more than one object in it), > that structure can be added at that time. Ok, I will change it in next version. Thanks, Eugen > > Guenter > > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel