On Wed, Apr 17, 2024 at 4:54 PM Conor Dooley <conor@xxxxxxxxxx> wrote:
>
> On Wed, Apr 17, 2024 at 03:51:10PM +0200, Pratik Farkase wrote:
> > Convert the Broadcom BCM2835 Auxiliary UART to newer DT schema.
> > Created DT schema based on the .txt file which had
> > `compatible`, `reg` `clocks` and `interrupts` as the
> > required properties. This binding is used by Broadcom BCM2835
> > SOC used in some Raspberry PI boards.
> > Changes from original file:
> > Implemented complete example which the original txt binding lacked.
> >
> > Signed-off-by: Pratik Farkase <pratik.farkase@xxxxxxxxxxxxx>
> > ---
> > Changes in v2
> > - Updated Maintainers list according to feedback
> > - Fixed typo `Auxiliar` to `Auxiliary`
> > ---
> > ---
> > .../bindings/serial/brcm,bcm2835-aux-uart.txt | 18 -------
> > .../serial/brcm,bcm2835-aux-uart.yaml | 48 +++++++++++++++++++
> > 2 files changed, 48 insertions(+), 18 deletions(-)
> > delete mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
> > create mode 100644 Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
> > deleted file mode 100644
> > index b5cc6297cd1b..000000000000
> > --- a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.txt
> > +++ /dev/null
> > @@ -1,18 +0,0 @@
> > -* BCM2835 AUXILIAR UART
> > -
> > -Required properties:
> > -
> > -- compatible: "brcm,bcm2835-aux-uart"
> > -- reg: The base address of the UART register bank.
> > -- interrupts: A single interrupt specifier.
> > -- clocks: Clock driving the hardware; used to figure out the baud rate
> > - divisor.
> > -
> > -Example:
> > -
> > - uart1: serial@7e215040 {
> > - compatible = "brcm,bcm2835-aux-uart";
> > - reg = <0x7e215040 0x40>;
> > - interrupts = <1 29>;
> > - clocks = <&aux BCM2835_AUX_CLOCK_UART>;
> > - };
> > diff --git a/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
> > new file mode 100644
> > index 000000000000..5d4d37371d6b
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/serial/brcm,bcm2835-aux-uart.yaml
> > @@ -0,0 +1,48 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/serial/brcm,bcm2835-aux-uart.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: BCM2835 AUXILIARY UART
> > +
> > +maintainers:
> > + - Pratik Farkase <pratikfarkase94@xxxxxxxxx>
> > + - Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
> > + - Stefan Wahren <wahrenst@xxxxxxx>
> > +
> > +allOf:
> > + - $ref: serial.yaml
> > +
> > +properties:
> > + compatible:
> > + const: brcm,bcm2835-aux-uart
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + interrupts:
> > + maxItems: 1
> > +
> > + clocks:
> > + maxItems: 1
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - clocks
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/bcm2835.h>
> > + #include <dt-bindings/clock/bcm2835-aux.h>
> > + #include <dt-bindings/interrupt-controller/irq.h>
>
> Only 1 of these headers seems used, there's only one define below.
>
> > + uart1: serial@7e215040 {
>
> The label is unused and can be dropped.
I did not understand this part. What do you suggest i change it into?
I took the example from original dtsi file:
arch/arm/boot/dts/broadcom/bcm283x.dtsi
>
> Otherwise,
> Reviewed-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
>
>
> > + compatible = "brcm,bcm2835-aux-uart";
> > + reg = <0x7e215040 0x40>;
> > + interrupts = <1 29>;
> > + clocks = <&aux BCM2835_AUX_CLOCK_UART>;
> > + };
> > --
> > 2.34.1
> >
--
Best Regards
Pratik Farkase
Be Passionate Be Smart
