From: Linus Walleij <linus.walleij@linaro.org>
To: Michal Simek <michal.simek@xilinx.com>
Cc: Piyush Mehta <piyush.mehta@xilinx.com>,
Arnd Bergmann <arnd@arndb.de>, Zou Wei <zou_wei@huawei.com>,
Greg KH <gregkh@linuxfoundation.org>,
wendy.liang@xilinx.com, Nobuhiro Iwamatsu <iwamatsu@nigauri.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Rob Herring <robh+dt@kernel.org>,
rajan.vaja@xilinx.com,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, git <git@xilinx.com>,
Srinivas Goud <sgoud@xilinx.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH V2 3/3] gpio: modepin: Add driver support for modepin GPIO controller
Date: Wed, 11 Aug 2021 16:45:04 +0200 [thread overview]
Message-ID: <CACRpkdZ5owo0rfOqysLpu+La+0p5SgNkjW6OFbG9tsOmtNJEtA@mail.gmail.com> (raw)
In-Reply-To: <974df9ef-6cdb-cb7b-2b9d-2eddaf1171f7@xilinx.com>
On Wed, Aug 11, 2021 at 3:30 PM Michal Simek <michal.simek@xilinx.com> wrote:
> They are bootmode pins because that pins are designed and used by ROM to
> get information which boot device should be used.
> But after this is it is really behaving as generic purpose I/O pins.
> Xilinx is using them for years for usb phy resets. I have also seen them
> to be used for other reset functionality.
OK if they are used for general purpose tasks then a GPIO driver
is fine, I was worried that it was just a way to read these pins from
userspace.
Go ahead with this patch series!
Yours,
Linus Walleij
WARNING: multiple messages have this Message-ID (diff)
From: Linus Walleij <linus.walleij@linaro.org>
To: Michal Simek <michal.simek@xilinx.com>
Cc: Piyush Mehta <piyush.mehta@xilinx.com>,
Arnd Bergmann <arnd@arndb.de>, Zou Wei <zou_wei@huawei.com>,
Greg KH <gregkh@linuxfoundation.org>,
wendy.liang@xilinx.com, Nobuhiro Iwamatsu <iwamatsu@nigauri.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
Rob Herring <robh+dt@kernel.org>,
rajan.vaja@xilinx.com,
"open list:GPIO SUBSYSTEM" <linux-gpio@vger.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>, git <git@xilinx.com>,
Srinivas Goud <sgoud@xilinx.com>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH V2 3/3] gpio: modepin: Add driver support for modepin GPIO controller
Date: Wed, 11 Aug 2021 16:45:04 +0200 [thread overview]
Message-ID: <CACRpkdZ5owo0rfOqysLpu+La+0p5SgNkjW6OFbG9tsOmtNJEtA@mail.gmail.com> (raw)
In-Reply-To: <974df9ef-6cdb-cb7b-2b9d-2eddaf1171f7@xilinx.com>
On Wed, Aug 11, 2021 at 3:30 PM Michal Simek <michal.simek@xilinx.com> wrote:
> They are bootmode pins because that pins are designed and used by ROM to
> get information which boot device should be used.
> But after this is it is really behaving as generic purpose I/O pins.
> Xilinx is using them for years for usb phy resets. I have also seen them
> to be used for other reset functionality.
OK if they are used for general purpose tasks then a GPIO driver
is fine, I was worried that it was just a way to read these pins from
userspace.
Go ahead with this patch series!
Yours,
Linus Walleij
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linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-08-11 14:45 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-05 17:42 [PATCH V2 0/3] gpio: modepin: Add driver support for modepin GPIO controller Piyush Mehta
2021-08-05 17:42 ` Piyush Mehta
2021-08-05 17:42 ` [PATCH V2 1/3] firmware: zynqmp: Add MMIO read and write support for PS_MODE pin Piyush Mehta
2021-08-05 17:42 ` Piyush Mehta
2021-08-06 5:49 ` Michal Simek
2021-08-06 5:49 ` Michal Simek
2021-08-11 13:08 ` Linus Walleij
2021-08-11 13:08 ` Linus Walleij
2021-08-11 13:46 ` Arnd Bergmann
2021-08-11 13:46 ` Arnd Bergmann
2021-08-11 14:04 ` Michal Simek
2021-08-11 14:04 ` Michal Simek
2021-08-11 15:14 ` Linus Walleij
2021-08-11 15:14 ` Linus Walleij
2021-08-05 17:42 ` [PATCH V2 2/3] dt-bindings: gpio: zynqmp: Add binding documentation for modepin Piyush Mehta
2021-08-05 17:42 ` Piyush Mehta
2021-08-13 19:01 ` Rob Herring
2021-08-13 19:01 ` Rob Herring
2021-08-16 6:27 ` Michal Simek
2021-08-16 6:27 ` Michal Simek
2021-08-05 17:42 ` [PATCH V2 3/3] gpio: modepin: Add driver support for modepin GPIO controller Piyush Mehta
2021-08-05 17:42 ` Piyush Mehta
2021-08-11 12:59 ` Linus Walleij
2021-08-11 12:59 ` Linus Walleij
2021-08-11 13:29 ` Michal Simek
2021-08-11 13:29 ` Michal Simek
2021-08-11 14:45 ` Linus Walleij [this message]
2021-08-11 14:45 ` Linus Walleij
2021-08-11 15:12 ` Linus Walleij
2021-08-11 15:12 ` Linus Walleij
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