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Thu, 06 May 2021 02:02:28 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Daniel Palmer Date: Thu, 6 May 2021 18:02:18 +0900 Message-ID: Subject: Re: gemini: sl3516: Mainlining of NS 2502 To: Linus Walleij Cc: Corentin Labbe , Hans Ulli Kroll , Linux ARM , linux-kernel X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210506_020232_094029_FC1494F0 X-CRM114-Status: GOOD ( 20.63 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; 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 Hi Linus, Coretin On Thu, 6 May 2021 at 08:56, Linus Walleij wrote: > On Wed, May 5, 2021 at 9:26 PM Corentin Labbe wrote: > > > It seems that USB is still a bit buggy, device are detected only if plugged before boot. > > Yeah :/ I don't know that driver very well, only that others use it too > so there might be some people who can help. I haven't mainlined > that patch because there is something that seems wrong about it > but I'm not a USB guy. Assuming I didn't read the wrong dts this machine is using the Faraday FOTG210. FWIW the MStar/Sigmastar ARMv7 (and earlier I think) chips use basically the same IP for USB host (FUSBH200). There used to be a distinct driver for the host-only version but it got removed at some point so I added support for it to the otg driver in my tree and it sort of works. It seems very picky about devices being hot plugged and doesn't seem able to enumerate low speed/full speed devices at all. Maybe we are seeing the same issues? I have a USB bus analyzer and I intend to debug this at some point. Adding support for USB on the MStar stuff is pretty far off but maybe if I find something Coretin can test to see if it helps out there too. Thanks, Daniel _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel