| Message ID | cover.1627362340.git.viresh.kumar@linaro.org |
|---|---|
| Headers | show |
| Series | virtio: Add virtio-device bindings | expand |
On 27-07-21, 10:53, Viresh Kumar wrote: > Hi, > > Currently the DT only provides support for following node types for virtio-mmio > nodes: > > virtio_mmio@a000000 { > dma-coherent; > interrupts = <0x00 0x10 0x01>; > reg = <0x00 0xa000000 0x00 0x200>; > compatible = "virtio,mmio"; > }; > > Here, 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 adds virtio-device bindings to allow for device sub-nodes to be > present and the second patch updates the virtio core to update the of_node. > > Other patches add bindings for i2c and gpio devices. > > Tested on x86 with qemu for arm64. Michael, I hope you will be picking this series (Now that it is reviewed by others) ? Just so you know, Wolfram needs the 4th patch, 4/5, to base the virtio-i2c driver over it and has requested an immutable branch for the same. Thanks.
On 27-07-21, 10:53, Viresh Kumar wrote: > Hi, > > Currently the DT only provides support for following node types for virtio-mmio > nodes: > > virtio_mmio@a000000 { > dma-coherent; > interrupts = <0x00 0x10 0x01>; > reg = <0x00 0xa000000 0x00 0x200>; > compatible = "virtio,mmio"; > }; > > Here, 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 adds virtio-device bindings to allow for device sub-nodes to be > present and the second patch updates the virtio core to update the of_node. > > Other patches add bindings for i2c and gpio devices. > > Tested on x86 with qemu for arm64. Michael, are you picking these up for 5.15 ? -- viresh
On Tue, Aug 31, 2021 at 11:01:05AM +0530, Viresh Kumar wrote: > On 27-07-21, 10:53, Viresh Kumar wrote: > > Hi, > > > > Currently the DT only provides support for following node types for virtio-mmio > > nodes: > > > > virtio_mmio@a000000 { > > dma-coherent; > > interrupts = <0x00 0x10 0x01>; > > reg = <0x00 0xa000000 0x00 0x200>; > > compatible = "virtio,mmio"; > > }; > > > > Here, 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 adds virtio-device bindings to allow for device sub-nodes to be > > present and the second patch updates the virtio core to update the of_node. > > > > Other patches add bindings for i2c and gpio devices. > > > > Tested on x86 with qemu for arm64. > > Michael, are you picking these up for 5.15 ? Okay. > -- > viresh
Hi, Currently the DT only provides support for following node types for virtio-mmio nodes: virtio_mmio@a000000 { dma-coherent; interrupts = <0x00 0x10 0x01>; reg = <0x00 0xa000000 0x00 0x200>; compatible = "virtio,mmio"; }; Here, 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 adds virtio-device bindings to allow for device sub-nodes to be present and the second patch updates the virtio core to update the of_node. Other patches add bindings for i2c and gpio devices. Tested on x86 with qemu for arm64. V3->V4: - The binding is named "virtio,deviceXXXXXXXX" now. - The virtio binding doesn't restrict the node names anymore. - The i2c/gpio nodes are named i2c and gpio now. - Dropped including gpio.yaml. - Updated code to match the new binding name. - Use "type: object" in additional-property. V2/2.1->V3: - Added review-tags from Arnd and Wolfram. - Only the 5th patch changed otherwise: - Use of_device_is_compatible() instead of keeping a list of devices. - Use snprintf (with BUG_ON on return value) to create the compatible string, whose length is fixed using "virtio,XXXXXXXX". - Use dev_of_node(). V1->V2: - The changes (both binding and code) are made at virtio level, instead of virtio-mmio. This allows the same to be used by all device types, irrespective of the transport mechanism. - Dropped the reg property and used compatible in the form "virtio,<DID>". - Dropped dt-bindings/virtio/virtio_ids.h. - Add a patch to sync virtio-ids from spec, required for the last patch. -- Viresh Viresh Kumar (5): dt-bindings: virtio: Add binding for virtio devices dt-bindings: i2c: Add bindings for i2c-virtio dt-bindings: gpio: Add bindings for gpio-virtio uapi: virtio_ids: Sync ids with specification virtio: Bind virtio device to device-tree node .../devicetree/bindings/gpio/gpio-virtio.yaml | 59 +++++++++++++++++++ .../devicetree/bindings/i2c/i2c-virtio.yaml | 51 ++++++++++++++++ .../devicetree/bindings/virtio/mmio.yaml | 3 +- .../bindings/virtio/virtio-device.yaml | 41 +++++++++++++ drivers/virtio/virtio.c | 57 +++++++++++++++++- include/uapi/linux/virtio_ids.h | 12 ++++ 6 files changed, 219 insertions(+), 4 deletions(-) create mode 100644 Documentation/devicetree/bindings/gpio/gpio-virtio.yaml create mode 100644 Documentation/devicetree/bindings/i2c/i2c-virtio.yaml create mode 100644 Documentation/devicetree/bindings/virtio/virtio-device.yaml