Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
From:   Florian Fainelli <f.fainelli@gmail.com>
Subject: Re: [patch v18 0/4] JTAG driver introduction
To:     Oleksandr Shamray <oleksandrs@mellanox.com>,
        gregkh@linuxfoundation.org, arnd@arndb.de
Cc:     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
References: <1517236305-4880-1-git-send-email-oleksandrs@mellanox.com>
Message-ID: <ff739c26-d3b2-3df7-e751-fbf037ae96d1@gmail.com>
Date:   Tue, 30 Jan 2018 19:03:29 -0800
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101
 Thunderbird/52.5.0
MIME-Version: 1.0
In-Reply-To: <1517236305-4880-1-git-send-email-oleksandrs@mellanox.com>
Content-Type: text/plain; charset=windows-1252
Content-Language: en-US
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

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