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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


             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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