From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Cyrus-Session-Id: sloti22d1t05-1572815-1518449118-2-13430793520539876080 X-Sieve: CMU Sieve 3.0 X-Spam-known-sender: no X-Spam-score: 0.0 X-Spam-hits: BAYES_00 -1.9, DATE_IN_PAST_12_24 1.049, HEADER_FROM_DIFFERENT_DOMAINS 0.001, ME_NOAUTH 0.01, RCVD_IN_DNSWL_HI -5, T_RP_MATCHES_RCVD -0.01, LANGUAGES en, BAYES_USED global, SA_VERSION 3.4.0 X-Spam-source: IP='209.132.180.67', Host='vger.kernel.org', Country='US', FromHeader='cz', MailFrom='org' X-Spam-charsets: plain='us-ascii' X-Resolved-to: greg@kroah.com X-Delivered-to: greg@kroah.com X-Mail-from: linux-api-owner@vger.kernel.org ARC-Seal: i=1; a=rsa-sha256; cv=none; d=messagingengine.com; s=arctest; t=1518449118; b=ar6jBCso/0gXhct5qlS7PY06fhoJ41X0yhDzIgdOyC1KswN LIvdj2lPviIQybtoQUmph93oifVpZy3io59V6fmFKlpENS34cm6H4KOtNNJiGMGQ lniQqLIIEynrb7vgW3VPEACUBERLHJctwvcwD5d1RMMwhkfxk7R3BDmWrLBQym/T 5ypVQJ+z1ACrA/MjNJX9hjQm2CahSzH6t0ub9Ci+bI0Jz9wh/jdpxVyV8slKORZv pKCcY22mjPY6DhEO5aI1HDdoMRNh2EumFOUwyo8pgCqlgfyswVqdWCWrmYRo/tFW 06iQk02ldJelpTTmaZe7SJovbv3rduDp3OLWvZg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=date:from:to:cc:subject:message-id :references:mime-version:content-type:content-transfer-encoding :in-reply-to:sender:list-id; s=arctest; t=1518449118; bh=yaKG/Iw GpEllhV79jf/MkBcnuNIHePMm1FN9oEhP2gc=; b=eyLge9OYdhXsl7L9nawTvAO AXkv/CAOKwsatIYFB2cDb1dsdRObTEwjMSSVduxEPZ0FHWZp0LdI73mdPN+49spD GdGwBK23B/RysRvEMgaxwPFlSjR/uXAIZxT0CIe9uF4IWYcKHsDndRXsE7hS8wYw cWYH6Ro/rUW1jk8RMPkBMRxhtXJVMEA1wJJwgRtUeR6wMcwBephsiR3lFt4AJgob 5C+xYNbMKqKmaI5KO+pH9tX5phZ/A1/5vqTY4YEoSI5eAjbwyfL6LC8IvcqETdtq b1senry3jN61cn++HuH2SdKoVf9wrilwL5zKgXueRRWwU6Oz4+6Uwh3m2R8vvwA= = ARC-Authentication-Results: i=1; mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=ucw.cz; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=ucw.cz header.result=pass header_is_org_domain=yes Authentication-Results: mx5.messagingengine.com; arc=none (no signatures found); dkim=none (no signatures found); dmarc=none (p=none,has-list-id=yes,d=none) header.from=ucw.cz; iprev=pass policy.iprev=209.132.180.67 (vger.kernel.org); spf=none smtp.mailfrom=linux-api-owner@vger.kernel.org smtp.helo=vger.kernel.org; x-aligned-from=fail; x-ptr=pass x-ptr-helo=vger.kernel.org x-ptr-lookup=vger.kernel.org; x-return-mx=pass smtp.domain=vger.kernel.org smtp.result=pass smtp_org.domain=kernel.org smtp_org.result=pass smtp_is_org_domain=no header.domain=ucw.cz header.result=pass header_is_org_domain=yes Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752889AbeBLPZP convert rfc822-to-8bit (ORCPT ); Mon, 12 Feb 2018 10:25:15 -0500 Received: from atrey.karlin.mff.cuni.cz ([195.113.26.193]:43011 "EHLO atrey.karlin.mff.cuni.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752692AbeBLPZO (ORCPT ); Mon, 12 Feb 2018 10:25:14 -0500 Date: Mon, 12 Feb 2018 00:43:44 +0100 From: Pavel Machek To: Oleksandr Shamray Cc: gregkh@linuxfoundation.org, arnd@arndb.de, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, openbmc@lists.ozlabs.org, joel@jms.id.au, jiri@resnulli.us, tklauser@distanz.ch, linux-serial@vger.kernel.org, vadimp@mellanox.com, system-sw-low-level@mellanox.com, robh+dt@kernel.org, openocd-devel-owner@lists.sourceforge.net, linux-api@vger.kernel.org, davem@davemloft.net, mchehab@kernel.org Subject: Re: [patch v14 4/4] Documentation: jtag: Add ABI documentation Message-ID: <20180211234344.GA3864@localhost> References: <1513268971-13518-1-git-send-email-oleksandrs@mellanox.com> <1513268971-13518-5-git-send-email-oleksandrs@mellanox.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: 8BIT In-Reply-To: <1513268971-13518-5-git-send-email-oleksandrs@mellanox.com> User-Agent: Mutt/1.5.21 (2010-09-15) Sender: linux-api-owner@vger.kernel.org X-Mailing-List: linux-api@vger.kernel.org X-getmail-retrieved-from-mailbox: INBOX X-Mailing-List: linux-kernel@vger.kernel.org List-ID: Hi! > @@ -0,0 +1,27 @@ > +What: /dev/jtag[0-9]+ > +Date: October 2017 > +KernelVersion: 4.15 > +Contact: oleksandrs@mellanox.com > +Description: > + The misc device files /dev/jtag* are the interface > + between JTAG master interface and userspace. > + > + The ioctl(2)-based ABI is defined and documented in > + [include/uapi]. > + > + The following file operations are supported: > + > + open(2) > + The argument flag currently support only one access > + mode O_RDWR. > + > + ioctl(2) > + Initiate various actions. > + See the inline documentation in [include/uapi] > + for descriptions of all ioctls. I tried reading the jtag.h, and am still not sure how it works. Real docs would be nice... In particular, it seems to always specify read or write actiom. Sounds like a job for read/write syscalls? Pavel -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html