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Wed, 30 Jun 2021 14:46:47 +0000 From: To: Subject: Re: [PATCH] usb: host: ohci-at91: suspend/resume ports after/before OHCI accesses Thread-Topic: [PATCH] usb: host: ohci-at91: suspend/resume ports after/before OHCI accesses Thread-Index: AQHXaC37D+YfoBgtzEKBvdp3Oa3YYg== Date: Wed, 30 Jun 2021 14:46:47 +0000 Message-ID: <856493cd-9d53-24b3-8e8b-c3c366f282bd@microchip.com> References: <20210609121027.70951-1-claudiu.beznea@microchip.com> <20210609230735.GA1861855@rowland.harvard.edu> <0621eaba-db4d-a174-1b15-535e804b52ac@microchip.com> <20210623135915.GB491169@rowland.harvard.edu> <20210623141907.GC491169@rowland.harvard.edu> <8bff20a7-8eb8-276a-086e-f1729fbbdbe4@microchip.com> <20210623164148.GC499969@rowland.harvard.edu> <20210624132304.GA528247@rowland.harvard.edu> In-Reply-To: <20210624132304.GA528247@rowland.harvard.edu> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.11.0 authentication-results: rowland.harvard.edu; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 24.06.2021 16:23, Alan Stern wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On Thu, Jun 24, 2021 at 06:40:25AM +0000, Claudiu.Beznea@microchip.com wrote: >> On 23.06.2021 19:41, Alan Stern wrote: >>> Are there any systems beside the SAMA7G5 and others you tested which >>> might be affected by this patch? Do they all work pretty much the >>> same way? (I want to make sure no others will be adversely affected >>> by this change.) >> >> I tested it on SAMA7G5, SAMA5D2 and SAM9X60. I tested the suspend/resume >> to/from mem. On SAMA5D2 and SAM9X60 there is no clock provided by >> transceiver A to OHCI. I encountered no issues on tested systems. These IPs >> are also present on SAMA5D3 and SAMA5D4 systems which I haven't tested as I >> expect to behave as SAMA5D2 (as the clocking scheme is the same with >> SAMA5D2). I can also try it on a SAMA5D3 (I don't have a SAMA5D4 with me at >> the moment), tough, just to be sure nothing is broken there too. > > That doesn't answer my question. I asked if there were any systems > which might be affected by your patch, and you listed a bunch of > systems that _aren't_ affected (that is, they continue to work > properly). I wrongly understood the initial question. > > What systems might run into trouble with this patch? These are all I haven't tested and might be affected: AT91RM9200, SAM9260, SAM9261, SAM9263, SAM9N12, SAM9X35, SAM9G45. The last two (SAM9X35 and SAM9G45) have the same clocking scheme with SAMA5D2 (which I tested). For the rest of them I cannot find the clocking scheme in datasheet and don't have them to test (at least at the moment). Thank you, Claudiu Beznea > > Alan Stern > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel