[V2,09/13] dt-bindings: arm: Convert BCM2835 board/soc bindings to json-schema
diff mbox series

Message ID 1565713248-4906-10-git-send-email-wahrenst@gmx.net
State Changes Requested
Headers show
Series
  • ARM: Add minimal Raspberry Pi 4 support
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robh/checkpatch warning "total: 0 errors, 1 warnings, 46 lines checked"

Commit Message

Stefan Wahren Aug. 13, 2019, 4:20 p.m. UTC
Convert the BCM2835/6/7 SoC bindings to DT schema format using json-schema.
All the other Broadcom boards are maintained by Florian Fainelli.

Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
Acked-by: Eric Anholt <eric@anholt.net>
---
 .../devicetree/bindings/arm/bcm/bcm2835.yaml       | 46 +++++++++++++++
 .../devicetree/bindings/arm/bcm/brcm,bcm2835.txt   | 67 ----------------------
 2 files changed, 46 insertions(+), 67 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
 delete mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt

--
2.7.4

Comments

Rob Herring Aug. 13, 2019, 5:22 p.m. UTC | #1
On Tue, Aug 13, 2019 at 10:21 AM Stefan Wahren <wahrenst@gmx.net> wrote:
>
> Convert the BCM2835/6/7 SoC bindings to DT schema format using json-schema.
> All the other Broadcom boards are maintained by Florian Fainelli.
>
> Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
> Acked-by: Eric Anholt <eric@anholt.net>
> ---
>  .../devicetree/bindings/arm/bcm/bcm2835.yaml       | 46 +++++++++++++++
>  .../devicetree/bindings/arm/bcm/brcm,bcm2835.txt   | 67 ----------------------
>  2 files changed, 46 insertions(+), 67 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
>  delete mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
>
> diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
> new file mode 100644
> index 0000000..1a4be26
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
> @@ -0,0 +1,46 @@
> +# SPDX-License-Identifier: GPL-2.0
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/arm/bcm/bcm2835.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom BCM2711/BCM2835 Platforms Device Tree Bindings
> +
> +maintainers:
> +  - Eric Anholt <eric@anholt.net>
> +  - Stefan Wahren <wahrenst@gmx.net>
> +
> +properties:
> +  $nodename:
> +    const: '/'
> +  compatible:
> +    oneOf:
> +      - description: BCM2835 based Boards
> +        items:
> +          - enum:
> +              - raspberrypi,model-a
> +              - raspberrypi,model-a-plus
> +              - raspberrypi,model-b
> +              - raspberrypi,model-b-i2c0  # Raspberry Pi Model B (no P5)
> +              - raspberrypi,model-b-rev2
> +              - raspberrypi,model-b-plus
> +              - raspberrypi,compute-module
> +              - raspberrypi,model-zero
> +              - raspberrypi,model-zero-w
> +          - const: brcm,bcm2835
> +
> +      - description: BCM2836 based Boards
> +        items:
> +          - enum:
> +              - raspberrypi,2-model-b

Don't you need brcm,bcm2836 here?

> +
> +      - description: BCM2837 based Boards
> +        items:
> +          - enum:
> +              - raspberrypi,3-model-a-plus
> +              - raspberrypi,3-model-b
> +              - raspberrypi,3-model-b-plus
> +              - raspberrypi,3-compute-module
> +              - raspberrypi,3-compute-module-lite

Don't you need brcm,bcm2837 here?

Please run 'dtbs_check' and make sure there aren't warnings (in the root node).

Rob
Stefan Wahren Aug. 14, 2019, 7:21 p.m. UTC | #2
Hi Rob,

Am 13.08.19 um 19:22 schrieb Rob Herring:
> On Tue, Aug 13, 2019 at 10:21 AM Stefan Wahren <wahrenst@gmx.net> wrote:
>> Convert the BCM2835/6/7 SoC bindings to DT schema format using json-schema.
>> All the other Broadcom boards are maintained by Florian Fainelli.
>>
>> Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
>> Acked-by: Eric Anholt <eric@anholt.net>
>> ---
>>  .../devicetree/bindings/arm/bcm/bcm2835.yaml       | 46 +++++++++++++++
>>  .../devicetree/bindings/arm/bcm/brcm,bcm2835.txt   | 67 ----------------------
>>  2 files changed, 46 insertions(+), 67 deletions(-)
>>  create mode 100644 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
>>  delete mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
>>
>> diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
>> new file mode 100644
>> index 0000000..1a4be26
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
>> @@ -0,0 +1,46 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/arm/bcm/bcm2835.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Broadcom BCM2711/BCM2835 Platforms Device Tree Bindings
>> +
>> +maintainers:
>> +  - Eric Anholt <eric@anholt.net>
>> +  - Stefan Wahren <wahrenst@gmx.net>
>> +
>> +properties:
>> +  $nodename:
>> +    const: '/'
>> +  compatible:
>> +    oneOf:
>> +      - description: BCM2835 based Boards
>> +        items:
>> +          - enum:
>> +              - raspberrypi,model-a
>> +              - raspberrypi,model-a-plus
>> +              - raspberrypi,model-b
>> +              - raspberrypi,model-b-i2c0  # Raspberry Pi Model B (no P5)
>> +              - raspberrypi,model-b-rev2
>> +              - raspberrypi,model-b-plus
>> +              - raspberrypi,compute-module
>> +              - raspberrypi,model-zero
>> +              - raspberrypi,model-zero-w
>> +          - const: brcm,bcm2835
>> +
>> +      - description: BCM2836 based Boards
>> +        items:
>> +          - enum:
>> +              - raspberrypi,2-model-b
> Don't you need brcm,bcm2836 here?
>
>> +
>> +      - description: BCM2837 based Boards
>> +        items:
>> +          - enum:
>> +              - raspberrypi,3-model-a-plus
>> +              - raspberrypi,3-model-b
>> +              - raspberrypi,3-model-b-plus
>> +              - raspberrypi,3-compute-module
>> +              - raspberrypi,3-compute-module-lite
> Don't you need brcm,bcm2837 here?
>
> Please run 'dtbs_check' and make sure there aren't warnings (in the root node).

thanks, after addressing your comments the root node doesn't have
warnings anymore.

Beside that there a lot of other warnings:

  DTC     arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml
  CHECK   arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
arm-pmu: compatible: ['arm,cortex-a72-pmu', 'arm,armv8-pmuv3'] is too long
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
arm-pmu: compatible: Additional items are not allowed ('arm,armv8-pmuv3'
was unexpected)

I think the schema is a little bit too strict by prohibit a fallback
compatible.

/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
serial@7e201800: Additional properties are not allowed
('arm,primecell-periphid' was unexpected)

In the old txt version this was an allowed property.

/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
firmware: $nodename:0: 'firmware' does not match
'^(bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
firmware: '#address-cells' is a required property
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
firmware: '#size-cells' is a required property
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
firmware: 'ranges' is a required property

I suggest to fix this by removing the "simple-bus".

/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
serial@7e201a00: Additional properties are not allowed
('arm,primecell-periphid' was unexpected)
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
gpio@7e200000: 'pinctrl-0' is a dependency of 'pinctrl-names'

This could be fixed by removing pinctrl-names.

/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
serial@7e201600: Additional properties are not allowed
('arm,primecell-periphid' was unexpected)
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
gic400@40041000: $nodename:0: 'gic400@40041000' does not match
'^interrupt-controller(@[0-9a-f,]+)*$'

I will rename gic400 to interrupt-controller.

/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
serial@7e201400: Additional properties are not allowed
('arm,primecell-periphid' was unexpected)
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
serial@7e201000: compatible: ['brcm,bcm2835-pl011', 'arm,pl011',
'arm,primecell'] is not valid under any of the given schemas
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
serial@7e201000: Additional properties are not allowed ('bluetooth',
'arm,primecell-periphid' were unexpected)
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
sd_io_1v8_reg: states:0: [1800000, 1, 3300000, 0] is too long
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
sd_io_1v8_reg: states:0: Additional items are not allowed (3300000, 0
were unexpected)

No idea what is wrong here

/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
#size-cells:0:0: 0 is not one of [1, 2]
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
$nodename:0: 'clocks' does not match '^(bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
clock@3:reg:0: [3] is too short
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
clock@4:reg:0: [4] is too short
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
'ranges' is a required property
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
clock@3: 'reg' does not match any of the regexes: 'pinctrl-[0-9]+'
/home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
clock@4: 'reg' does not match any of the regexes: 'pinctrl-[0-9]+'

This could be fixed by avoiding a simple-bus for the fixed clocks.

Stefan

>
> Rob
>
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
Rob Herring Aug. 14, 2019, 11:06 p.m. UTC | #3
On Wed, Aug 14, 2019 at 1:21 PM Stefan Wahren <wahrenst@gmx.net> wrote:
>
> Hi Rob,
>
> Am 13.08.19 um 19:22 schrieb Rob Herring:
> > On Tue, Aug 13, 2019 at 10:21 AM Stefan Wahren <wahrenst@gmx.net> wrote:
> >> Convert the BCM2835/6/7 SoC bindings to DT schema format using json-schema.
> >> All the other Broadcom boards are maintained by Florian Fainelli.
> >>
> >> Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
> >> Acked-by: Eric Anholt <eric@anholt.net>
> >> ---
> >>  .../devicetree/bindings/arm/bcm/bcm2835.yaml       | 46 +++++++++++++++
> >>  .../devicetree/bindings/arm/bcm/brcm,bcm2835.txt   | 67 ----------------------
> >>  2 files changed, 46 insertions(+), 67 deletions(-)
> >>  create mode 100644 Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
> >>  delete mode 100644 Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
> >>
> >> diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
> >> new file mode 100644
> >> index 0000000..1a4be26
> >> --- /dev/null
> >> +++ b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
> >> @@ -0,0 +1,46 @@
> >> +# SPDX-License-Identifier: GPL-2.0
> >> +%YAML 1.2
> >> +---
> >> +$id: http://devicetree.org/schemas/arm/bcm/bcm2835.yaml#
> >> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> >> +
> >> +title: Broadcom BCM2711/BCM2835 Platforms Device Tree Bindings
> >> +
> >> +maintainers:
> >> +  - Eric Anholt <eric@anholt.net>
> >> +  - Stefan Wahren <wahrenst@gmx.net>
> >> +
> >> +properties:
> >> +  $nodename:
> >> +    const: '/'
> >> +  compatible:
> >> +    oneOf:
> >> +      - description: BCM2835 based Boards
> >> +        items:
> >> +          - enum:
> >> +              - raspberrypi,model-a
> >> +              - raspberrypi,model-a-plus
> >> +              - raspberrypi,model-b
> >> +              - raspberrypi,model-b-i2c0  # Raspberry Pi Model B (no P5)
> >> +              - raspberrypi,model-b-rev2
> >> +              - raspberrypi,model-b-plus
> >> +              - raspberrypi,compute-module
> >> +              - raspberrypi,model-zero
> >> +              - raspberrypi,model-zero-w
> >> +          - const: brcm,bcm2835
> >> +
> >> +      - description: BCM2836 based Boards
> >> +        items:
> >> +          - enum:
> >> +              - raspberrypi,2-model-b
> > Don't you need brcm,bcm2836 here?
> >
> >> +
> >> +      - description: BCM2837 based Boards
> >> +        items:
> >> +          - enum:
> >> +              - raspberrypi,3-model-a-plus
> >> +              - raspberrypi,3-model-b
> >> +              - raspberrypi,3-model-b-plus
> >> +              - raspberrypi,3-compute-module
> >> +              - raspberrypi,3-compute-module-lite
> > Don't you need brcm,bcm2837 here?
> >
> > Please run 'dtbs_check' and make sure there aren't warnings (in the root node).
>
> thanks, after addressing your comments the root node doesn't have
> warnings anymore.
>
> Beside that there a lot of other warnings:
>
>   DTC     arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml
>   CHECK   arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> arm-pmu: compatible: ['arm,cortex-a72-pmu', 'arm,armv8-pmuv3'] is too long
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> arm-pmu: compatible: Additional items are not allowed ('arm,armv8-pmuv3'
> was unexpected)
>
> I think the schema is a little bit too strict by prohibit a fallback
> compatible.

IIRC, Will Deacon said there wasn't any point to fallbacks as every
cpu has its own list of events. Or if we want a fallback, then add it
to the schema.

>
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> serial@7e201800: Additional properties are not allowed
> ('arm,primecell-periphid' was unexpected)
>
> In the old txt version this was an allowed property.

You really need an override? Haven't seen that in a while. We can drop
'additionalProperties: false' in the pl011 schema.

>
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> firmware: $nodename:0: 'firmware' does not match
> '^(bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> firmware: '#address-cells' is a required property
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> firmware: '#size-cells' is a required property
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> firmware: 'ranges' is a required property
>
> I suggest to fix this by removing the "simple-bus".

Probably. 'firmware' doesn't sound like a bus.

>
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> serial@7e201a00: Additional properties are not allowed
> ('arm,primecell-periphid' was unexpected)
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> gpio@7e200000: 'pinctrl-0' is a dependency of 'pinctrl-names'
>
> This could be fixed by removing pinctrl-names.
>
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> serial@7e201600: Additional properties are not allowed
> ('arm,primecell-periphid' was unexpected)
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> gic400@40041000: $nodename:0: 'gic400@40041000' does not match
> '^interrupt-controller(@[0-9a-f,]+)*$'
>
> I will rename gic400 to interrupt-controller.
>
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> serial@7e201400: Additional properties are not allowed
> ('arm,primecell-periphid' was unexpected)
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> serial@7e201000: compatible: ['brcm,bcm2835-pl011', 'arm,pl011',
> 'arm,primecell'] is not valid under any of the given schemas
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> serial@7e201000: Additional properties are not allowed ('bluetooth',
> 'arm,primecell-periphid' were unexpected)
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> sd_io_1v8_reg: states:0: [1800000, 1, 3300000, 0] is too long
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> sd_io_1v8_reg: states:0: Additional items are not allowed (3300000, 0
> were unexpected)
>
> No idea what is wrong here

The schema is stricter about <> groupings is my guess. Looks like this
should be 2 entries with 2 cells each.

> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
> #size-cells:0:0: 0 is not one of [1, 2]
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
> $nodename:0: 'clocks' does not match '^(bus|soc|axi|ahb|apb)(@[0-9a-f]+)?$'
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
> clock@3:reg:0: [3] is too short
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
> clock@4:reg:0: [4] is too short
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml: clocks:
> 'ranges' is a required property
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> clock@3: 'reg' does not match any of the regexes: 'pinctrl-[0-9]+'
> /home/stefan/torvalds/arch/arm/boot/dts/bcm2711-rpi-4-b.dt.yaml:
> clock@4: 'reg' does not match any of the regexes: 'pinctrl-[0-9]+'
>
> This could be fixed by avoiding a simple-bus for the fixed clocks.

Right, they are not a bus.

Rob

Patch
diff mbox series

diff --git a/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
new file mode 100644
index 0000000..1a4be26
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/bcm/bcm2835.yaml
@@ -0,0 +1,46 @@ 
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/bcm/bcm2835.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Broadcom BCM2711/BCM2835 Platforms Device Tree Bindings
+
+maintainers:
+  - Eric Anholt <eric@anholt.net>
+  - Stefan Wahren <wahrenst@gmx.net>
+
+properties:
+  $nodename:
+    const: '/'
+  compatible:
+    oneOf:
+      - description: BCM2835 based Boards
+        items:
+          - enum:
+              - raspberrypi,model-a
+              - raspberrypi,model-a-plus
+              - raspberrypi,model-b
+              - raspberrypi,model-b-i2c0  # Raspberry Pi Model B (no P5)
+              - raspberrypi,model-b-rev2
+              - raspberrypi,model-b-plus
+              - raspberrypi,compute-module
+              - raspberrypi,model-zero
+              - raspberrypi,model-zero-w
+          - const: brcm,bcm2835
+
+      - description: BCM2836 based Boards
+        items:
+          - enum:
+              - raspberrypi,2-model-b
+
+      - description: BCM2837 based Boards
+        items:
+          - enum:
+              - raspberrypi,3-model-a-plus
+              - raspberrypi,3-model-b
+              - raspberrypi,3-model-b-plus
+              - raspberrypi,3-compute-module
+              - raspberrypi,3-compute-module-lite
+
+...
diff --git a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
deleted file mode 100644
index 245328f..0000000
--- a/Documentation/devicetree/bindings/arm/bcm/brcm,bcm2835.txt
+++ /dev/null
@@ -1,67 +0,0 @@ 
-Broadcom BCM2835 device tree bindings
--------------------------------------------
-
-Raspberry Pi Model A
-Required root node properties:
-compatible = "raspberrypi,model-a", "brcm,bcm2835";
-
-Raspberry Pi Model A+
-Required root node properties:
-compatible = "raspberrypi,model-a-plus", "brcm,bcm2835";
-
-Raspberry Pi Model B
-Required root node properties:
-compatible = "raspberrypi,model-b", "brcm,bcm2835";
-
-Raspberry Pi Model B (no P5)
-early model B with I2C0 rather than I2C1 routed to the expansion header
-Required root node properties:
-compatible = "raspberrypi,model-b-i2c0", "brcm,bcm2835";
-
-Raspberry Pi Model B rev2
-Required root node properties:
-compatible = "raspberrypi,model-b-rev2", "brcm,bcm2835";
-
-Raspberry Pi Model B+
-Required root node properties:
-compatible = "raspberrypi,model-b-plus", "brcm,bcm2835";
-
-Raspberry Pi 2 Model B
-Required root node properties:
-compatible = "raspberrypi,2-model-b", "brcm,bcm2836";
-
-Raspberry Pi 3 Model A+
-Required root node properties:
-compatible = "raspberrypi,3-model-a-plus", "brcm,bcm2837";
-
-Raspberry Pi 3 Model B
-Required root node properties:
-compatible = "raspberrypi,3-model-b", "brcm,bcm2837";
-
-Raspberry Pi 3 Model B+
-Required root node properties:
-compatible = "raspberrypi,3-model-b-plus", "brcm,bcm2837";
-
-Raspberry Pi Compute Module
-Required root node properties:
-compatible = "raspberrypi,compute-module", "brcm,bcm2835";
-
-Raspberry Pi Compute Module 3
-Required root node properties:
-compatible = "raspberrypi,3-compute-module", "brcm,bcm2837";
-
-Raspberry Pi Compute Module 3 Lite
-Required root node properties:
-compatible = "raspberrypi,3-compute-module-lite", "brcm,bcm2837";
-
-Raspberry Pi Zero
-Required root node properties:
-compatible = "raspberrypi,model-zero", "brcm,bcm2835";
-
-Raspberry Pi Zero W
-Required root node properties:
-compatible = "raspberrypi,model-zero-w", "brcm,bcm2835";
-
-Generic BCM2835 board
-Required root node properties:
-compatible = "brcm,bcm2835";