Граф коммитов

6 Коммитов

Автор SHA1 Сообщение Дата
Michael S. Tsirkin d9679d0013 virtio: wrap config->reset calls
This will enable cleanups down the road.
The idea is to disable cbs, then add "flush_queued_cbs" callback
as a parameter, this way drivers can flush any work
queued after callbacks have been disabled.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Link: https://lore.kernel.org/r/20211013105226.20225-1-mst@redhat.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2022-01-14 18:50:52 -05:00
Vincent Whitchurch 3e4d9a4850 gpio: virtio: remove timeout
The driver imposes an arbitrary one second timeout on virtio requests,
but the specification doesn't prevent the virtio device from taking
longer to process requests, so remove this timeout to support all
systems and device implementations.

Fixes: 3a29355a22 ("gpio: Add virtio-gpio driver")
Signed-off-by: Vincent Whitchurch <vincent.whitchurch@axis.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2021-12-21 16:22:58 +01:00
Yang Li f7715b3a34 gpio: virtio: remove unneeded semicolon
Eliminate the following coccicheck warning:
./drivers/gpio/gpio-virtio.c:437:2-3: Unneeded semicolon

Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2021-11-15 14:24:59 +01:00
Viresh Kumar eff5cdd745 gpio: virtio: Add IRQ support
This patch adds IRQ support for the virtio GPIO driver. Note that this
uses the irq_bus_lock/unlock() callbacks, since those operations over
virtio may sleep.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>
2021-11-04 16:34:29 +01:00
Viresh Kumar 17395d7742 gpio: virtio: Fix sparse warnings
Fix warnings reported by sparse, related to type mismatch between u16
and __le16.

Reported-by: kernel test robot <lkp@intel.com>
Fixes: 3a29355a22 ("gpio: Add virtio-gpio driver")
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-31 11:07:05 +02:00
Viresh Kumar 3a29355a22 gpio: Add virtio-gpio driver
This patch adds a new driver for Virtio based GPIO devices.

This allows a guest VM running Linux to access GPIO lines provided by
the host. It supports all basic operations, except interrupts for the
GPIO lines.

Based on the initial work posted by:
"Enrico Weigelt, metux IT consult" <lkml@metux.net>.

Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
2021-08-23 09:55:44 +02:00