From: Viresh Kumar <viresh.kumar@linaro.org>
To: Arnd Bergmann <arnd@kernel.org>,
Linus Walleij <linus.walleij@linaro.org>,
Bartosz Golaszewski <bgolaszewski@baylibre.com>,
"Enrico Weigelt, metux IT consult" <info@metux.net>,
Jason Wang <jasowang@redhat.com>,
"Michael S. Tsirkin" <mst@redhat.com>,
Viresh Kumar <vireshk@kernel.org>
Cc: "Viresh Kumar" <viresh.kumar@linaro.org>,
"Vincent Guittot" <vincent.guittot@linaro.org>,
"Jean-Philippe Brucker" <jean-philippe@linaro.org>,
"Bill Mills" <bill.mills@linaro.org>,
"Alex Bennée" <alex.bennee@linaro.org>,
"Cornelia Huck" <cohuck@redhat.com>,
"Geert Uytterhoeven" <geert@linux-m68k.org>,
stratos-dev@op-lists.linaro.org, linux-kernel@vger.kernel.org,
"Thomas Gleixner" <tglx@linutronix.de>,
"Marc Zyngier" <maz@kernel.org>,
linux-gpio@vger.kernel.org,
virtualization@lists.linux-foundation.org
Subject: [PATCH V4 0/2] gpio: Add virtio based driver
Date: Tue, 3 Aug 2021 17:06:54 +0530 [thread overview]
Message-ID: <cover.1627989586.git.viresh.kumar@linaro.org> (raw)
Hello,
This adds Virtio GPIO driver based on the proposed specification [1].
The specification for basic GPIO operations is already reviewed by Linus and
Arnd, while the IRQ stuff is still under discussion and not finalized.
I am sharing the code, so everyone gets more clarity on how it will work
eventually in Linux.
I have tested this patchset with Qemu guest with help of the libgpiod utility.
I have also tested basic handling of interrupts on the guest side. It works as
expected.
The host side virtio-backend isn't ready yet and my tests only tested the flow
control between guest and host, but didn't play with real GPIO pins. That will
be done once I have a working backend in place (WIP).
V3->V4:
- Lots of changes, as the specification changed too much. Better forget
everything we have done until now :)
--
Viresh
[1] https://lists.oasis-open.org/archives/virtio-dev/202107/msg00232.html
Viresh Kumar (2):
gpio: Add virtio-gpio driver
gpio: virtio: Add IRQ support
MAINTAINERS | 7 +
drivers/gpio/Kconfig | 10 +
drivers/gpio/Makefile | 1 +
drivers/gpio/gpio-virtio.c | 648 +++++++++++++++++++++++++++++++
include/uapi/linux/virtio_gpio.h | 72 ++++
5 files changed, 738 insertions(+)
create mode 100644 drivers/gpio/gpio-virtio.c
create mode 100644 include/uapi/linux/virtio_gpio.h
--
2.31.1.272.g89b43f80a514
next reply other threads:[~2021-08-03 11:37 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-03 11:36 Viresh Kumar [this message]
2021-08-03 11:36 ` [PATCH V4 1/2] gpio: Add virtio-gpio driver Viresh Kumar
2021-08-03 11:36 ` [PATCH V4 2/2] gpio: virtio: Add IRQ support Viresh Kumar
2021-08-03 15:01 ` Arnd Bergmann
2021-08-04 7:05 ` Viresh Kumar
2021-08-04 8:27 ` Arnd Bergmann
2021-08-05 7:05 ` Viresh Kumar
2021-08-05 11:26 ` Viresh Kumar
[not found] ` <0100017b1610f711-c53c79f2-9e28-4c45-bb42-8db09688b18e-000000@email.amazonses.com>
2021-08-05 12:03 ` [Stratos-dev] " Arnd Bergmann
2021-08-05 12:49 ` Viresh Kumar
2021-08-05 13:10 ` Arnd Bergmann
2021-08-06 7:44 ` Viresh Kumar
[not found] ` <0100017b1a6c0a05-e41dc16c-b326-4017-a63d-a24a6c1fde70-000000@email.amazonses.com>
2021-08-06 8:00 ` Arnd Bergmann
2021-08-09 7:30 ` Viresh Kumar
2021-08-09 7:55 ` Arnd Bergmann
2021-08-09 10:46 ` Viresh Kumar
[not found] ` <0100017b2a85eaf8-08b905fc-89f7-43a4-857e-070ca9691ce1-000000@email.amazonses.com>
2021-08-09 11:19 ` Arnd Bergmann
2021-08-10 7:35 ` Viresh Kumar
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