From: Stuart Longland <stuartl@longlandclan.id.au>
To: Linus Walleij <linus.walleij@linaro.org>,
Rick Altherr <raltherr@google.com>
Cc: "devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"Jiří Pírko" <jiri@resnulli.us>, "Arnd Bergmann" <arnd@arndb.de>,
system-sw-low-level@mellanox.com,
"Greg KH" <gregkh@linuxfoundation.org>,
"OpenBMC Maillist" <openbmc@lists.ozlabs.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
openocd-devel-owner@lists.sourceforge.net, mec@shout.net,
"Rob Herring" <robh+dt@kernel.org>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"linux-serial@vger.kernel.org" <linux-serial@vger.kernel.org>,
"linux-api@vger.kernel.org" <linux-api@vger.kernel.org>,
"Tobias Klauser" <tklauser@distanz.ch>,
"Oleksandr Shamray" <oleksandrs@mellanox.com>
Subject: Re: [patch v6 0/3] JTAG driver introduction
Date: Fri, 25 Aug 2017 18:50:23 +1000 [thread overview]
Message-ID: <593cd0d3-8e06-0992-c155-1322014c0477@longlandclan.id.au> (raw)
In-Reply-To: <CACRpkdbozWaL0RXyZXjzxYK3JHiqYziSkTGSgGORdptX-rwR8A@mail.gmail.com>
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[Note: dropping vadimp@maellanox.com as SMTP server complained about the
DNS server returning NXDOMAIN. Apologies.]
On 25/08/17 18:32, Linus Walleij wrote:
> Gnah!
> Whoever writes a slot-in replacement making the character device
> take precendence wins lots of karma.
What would such a replacement look like though?
Some sort of system whereby you can read/write single-line commands as
if talking to a GPIO expander over a UART?
Would you access the GPIOs one by one, or would you perhaps map them
into a bitmap (maybe arbitrarily, up to 64-bits wide) and perform masked
operations on the bitmap?
I'm no fan of the sysfs GPIO interface, but it beats poking around at
registers behind the kernel's back.
--
Stuart Longland (aka Redhatter, VK4MSL)
I haven't lost my mind...
...it's backed up on a tape somewhere.
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next prev parent reply other threads:[~2017-08-25 8:50 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-22 16:10 [patch v6 0/3] JTAG driver introduction Oleksandr Shamray
2017-08-22 16:10 ` [patch v6 2/3] drivers: jtag: Add Aspeed SoC 24xx and 25xx families JTAG master driver Oleksandr Shamray
2017-08-22 16:10 ` [patch v6 3/3] Doccumentation: jtag: Add bindings for " Oleksandr Shamray
2017-08-28 8:36 ` Tobias Klauser
[not found] ` <1503418256-5215-1-git-send-email-oleksandrs-VPRAkNaXOzVWk0Htik3J/w@public.gmane.org>
2017-08-22 16:10 ` [patch v6 1/3] drivers: jtag: Add JTAG core driver Oleksandr Shamray
2017-08-24 21:07 ` [patch v6 0/3] JTAG driver introduction Linus Walleij
[not found] ` <CACRpkdZePXyo8Q36mBH7OnJU3E=yWPWSGkGUOH=zJFMjM=Yrhw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-24 21:37 ` Rick Altherr
2017-08-25 8:32 ` Linus Walleij
2017-08-25 8:50 ` Stuart Longland [this message]
[not found] ` <593cd0d3-8e06-0992-c155-1322014c0477-3e+Fe6x+DsgJbe36r25VNhCuuivNXqWP@public.gmane.org>
2017-08-25 16:53 ` Rick Altherr
2017-08-27 22:25 ` Linus Walleij
[not found] ` <CACRpkdbozWaL0RXyZXjzxYK3JHiqYziSkTGSgGORdptX-rwR8A-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-25 16:52 ` Rick Altherr
[not found] ` <CAPLgG=mv1p98e4Vzso1N-VU=1MSotkTmnF+DcDTXPcd3q-n8HA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-27 22:30 ` Linus Walleij
[not found] ` <CACRpkdb75L5BrYN+V-BMwzrRm8_Wtymr3d08eMWt43FiBpH5Qg-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-08-28 2:55 ` Rick Altherr
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