linux-kernel - [PATCH 0/5] virtio: Parse virtio-device nodes from DT

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Date:   Tue, 13 Jul 2021 16:20:29 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Jason Wang <jasowang@...hat.com>,
        "Michael S. Tsirkin" <mst@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Arnd Bergmann <arnd@...nel.org>,
        Jean-Philippe Brucker <jean-philippe@...aro.org>,
        Bartosz Golaszewski <bgolaszewski@...libre.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        Viresh Kumar <viresh.kumar@...aro.org>
Cc:     Vincent Guittot <vincent.guittot@...aro.org>,
        Bill Mills <bill.mills@...aro.org>,
        Alex Bennée <alex.bennee@...aro.org>,
        "Enrico Weigelt, metux IT consult" <info@...ux.net>,
        Jie Deng <jie.deng@...el.com>, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org,
        linux-gpio@...r.kernel.org, linux-i2c@...r.kernel.org,
        Wolfram Sang <wsa@...nel.org>
Subject: [PATCH 0/5] virtio: Parse virtio-device nodes from DT

Hi,

Currently the DT only provides support for following node types for virtio-mmio
nodes:

	virtio_mmio@...0000 {
		dma-coherent;
		interrupts = <0x00 0x10 0x01>;
		reg = <0x00 0xa000000 0x00 0x200>;
		compatible = "virtio,mmio";
	};

And each virtio-mmio corresponds to a virtio-device. But there is no way for
other users in the DT to show their dependency on virtio devices.

This patchset provides that support.

The first patch update virtio,mmio bindings to allow for device subnodes to be
present and the second patch updates the virtio-mmio driver to update the
of_node.

Other patches add bindings for i2c and gpio virtio devices (they have some
dependencies, mentioned in the patches).

Tested on x86 with qemu for arm64.

--
Viresh

Viresh Kumar (5):
  dt-bindings: virtio: mmio: Add support for device subnode
  virtio_mmio: Bind virtio device to device-tree node
  dt-bindings: i2c: Add bindings for i2c-virtio
  i2c: virtio: Update i2c-adapter's of_node
  dt-bindings: gpio: Add bindings for gpio-virtio

 .../devicetree/bindings/gpio/gpio-virtio.yaml | 67 +++++++++++++++++++
 .../devicetree/bindings/i2c/i2c-virtio.yaml   | 59 ++++++++++++++++
 .../devicetree/bindings/virtio/mmio.yaml      | 41 ++++++++++++
 drivers/i2c/busses/i2c-virtio.c               |  1 +
 drivers/virtio/virtio_mmio.c                  | 44 ++++++++++++
 include/dt-bindings/virtio/virtio_ids.h       |  1 +
 6 files changed, 213 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/gpio/gpio-virtio.yaml
 create mode 100644 Documentation/devicetree/bindings/i2c/i2c-virtio.yaml
 create mode 120000 include/dt-bindings/virtio/virtio_ids.h

-- 
2.31.1.272.g89b43f80a514