From mboxrd@z Thu Jan 1 00:00:00 1970 From: Florian Fainelli Subject: Re: [patch v18 0/4] JTAG driver introduction Date: Tue, 30 Jan 2018 19:03:29 -0800 Message-ID: References: <1517236305-4880-1-git-send-email-oleksandrs@mellanox.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1517236305-4880-1-git-send-email-oleksandrs-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org> Content-Language: en-US Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: Oleksandr Shamray , gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, arnd-r2nGTMty4D4@public.gmane.org Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, openbmc-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, joel-U3u1mxZcP9KHXe+LvDLADg@public.gmane.org, jiri-rHqAuBHg3fBzbRFIqnYvSA@public.gmane.org, tklauser-93Khv+1bN0NyDzI6CaY1VQ@public.gmane.org, linux-serial-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, vadimp-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, system-sw-low-level-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, openocd-devel-owner-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, davem-fT/PcQaiUtIeIZ0/mPfg9Q@public.gmane.org, mchehab-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org List-Id: devicetree@vger.kernel.org On 01/29/2018 06:31 AM, Oleksandr Shamray wrote: > When a need raise up to use JTAG interface for system's devices > programming or CPU debugging, usually the user layer > application implements jtag protocol by bit-bang or using a > proprietary connection to vendor hardware. > This method can be slow and not generic. > > We propose to implement general JTAG interface and infrastructure > to communicate with user layer application. In such way, we can > have the standard JTAG interface core part and separation from > specific HW implementation. > This allow new capability to debug the CPU or program system's > device via BMC without additional devices nor cost. Oleksandr, you have completed dodged my questions here: https://lkml.org/lkml/2017/12/25/163 can you try to respond to some of these questions please? -- Florian -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html