From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: virtio-comment-return-1878-cohuck=redhat.com@lists.oasis-open.org Sender: List-Post: List-Help: List-Unsubscribe: List-Subscribe: Received: from lists.oasis-open.org (oasis-open.org [10.110.1.242]) by lists.oasis-open.org (Postfix) with ESMTP id 87DCB986575 for ; Fri, 4 Jun 2021 03:33:51 +0000 (UTC) Date: Fri, 4 Jun 2021 09:03:44 +0530 From: Viresh Kumar Message-ID: <20210604033344.c2tnt7upv7y3soaq@vireshk-i7> References: <0f36102a-8ce0-8cda-cb3f-3b41b346fad9@metux.net> MIME-Version: 1.0 In-Reply-To: Subject: Re: [virtio-comment] Re: [PATCH] Reserve device id for GPIO device Content-Type: text/plain; charset=us-ascii Content-Disposition: inline To: Jie Deng Cc: "Enrico Weigelt, metux IT consult" , virtio-comment@lists.oasis-open.org, Vincent Guittot , Bill Mills , Alex =?utf-8?Q?Benn=C3=A9e?= , "Enrico Weigelt, metux IT consult" List-ID: On 04-06-21, 10:28, Jie Deng wrote: > Has anyone ever tried to use GPIO in the guest to generate waveform ? I haven't tried the code yet, I just started where Enrico left earlier. Done with Id allocation and specs (yes reviews pending), will be looking into kernel now. > When the frequency reaches a certain level, the waveform will become > inaccurate > due to the delay and uncertainty of the communication time between virtio > frontend > and backend. I'm not sure if any good solution for this case. This is expected I would say. The interface is going to be slow and at some frequency it will break the waveform. -- viresh This publicly archived list offers a means to provide input to the OASIS Virtual I/O Device (VIRTIO) TC. In order to verify user consent to the Feedback License terms and to minimize spam in the list archive, subscription is required before posting. Subscribe: virtio-comment-subscribe@lists.oasis-open.org Unsubscribe: virtio-comment-unsubscribe@lists.oasis-open.org List help: virtio-comment-help@lists.oasis-open.org List archive: https://lists.oasis-open.org/archives/virtio-comment/ Feedback License: https://www.oasis-open.org/who/ipr/feedback_license.pdf List Guidelines: https://www.oasis-open.org/policies-guidelines/mailing-lists Committee: https://www.oasis-open.org/committees/virtio/ Join OASIS: https://www.oasis-open.org/join/