[PATCH v2 1/3] dt-bindings: gpio: spacemit: add support for K1 SoC
Yixun Lan
dlan at gentoo.org
Thu Dec 19 14:18:57 PST 2024
Hi Conor:
thanks for your review
On 19:52 Thu 19 Dec , Conor Dooley wrote:
> On Thu, Dec 19, 2024 at 03:17:43PM +0800, Yixun Lan wrote:
> > The GPIO controller of K1 support basic functions as input/output,
> > all pins can be used as interrupt which route to one IRQ line,
> > trigger type can be select between rising edge, failing edge, or both.
> > There are four GPIO banks, each consisting of 32 pins.
> >
> > Signed-off-by: Yixun Lan <dlan at gentoo.org>
> > ---
> > .../devicetree/bindings/gpio/spacemit,k1-gpio.yaml | 75 ++++++++++++++++++++++
> > 1 file changed, 75 insertions(+)
> >
> > diff --git a/Documentation/devicetree/bindings/gpio/spacemit,k1-gpio.yaml b/Documentation/devicetree/bindings/gpio/spacemit,k1-gpio.yaml
> > new file mode 100644
> > index 0000000000000000000000000000000000000000..3d3d0b3bf2c144ed57b717bee50064949e26f087
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/gpio/spacemit,k1-gpio.yaml
> > @@ -0,0 +1,75 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/gpio/spacemit,k1-gpio.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: SpacemiT K1 GPIO controller
> > +
> > +maintainers:
> > + - Yixun Lan <dlan at gentoo.org>
> > +
> > +description:
> > + The controller's registers are organized as sets of eight 32-bit
> > + registers with each set controlling a bank of up to 32 pins. A single
> > + interrupt is shared for all of the banks handled by the controller.
> > +
> > +properties:
> > + compatible:
> > + const: spacemit,k1-gpio
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + ranges: true
>
> What do you need this for?
>
right, this isn't needed, will drop it.
> > +
> > + "#gpio-cells":
> > + const: 2
> > +
> > + gpio-controller: true
> > +
> > + gpio-ranges: true
> > +
> > + interrupts:
> > + maxItems: 1
> > + description:
> > + The interrupt shared by all GPIO lines for this controller.
> > +
> > + interrupt-names: true
>
> Not that a name is valuable when you only have one interrupt, but if you
> don't specify what the name is, you cannot interrupt-names!
>
indeed there is one interrupt, I will drop this property
> Cheers,
> Conor.
>
> > +
> > + "#interrupt-cells":
> > + const: 2
> > + description:
> > + The first cell is the GPIO number, the second should specify interrupt
> > + flag. The controller does not support level interrupts, flags of
> > + IRQ_TYPE_LEVEL_HIGH, IRQ_TYPE_LEVEL_LOW should not be used.
> > + Refer <dt-bindings/interrupt-controller/irq.h> for valid flags.
> > +
> > + interrupt-controller: true
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - gpio-controller
> > + - "#gpio-cells"
> > + - interrupts
> > + - interrupt-names
> > + - interrupt-controller
> > + - "#interrupt-cells"
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > + - |
> > + gpio at d4019000 {
> > + compatible = "spacemit,k1-gpio";
> > + reg = <0xd4019000 0x800>;
> > + gpio-controller;
> > + #gpio-cells = <2>;
> > + interrupts = <58>;
> > + interrupt-names = "gpio_mux";
> > + interrupt-parent = <&plic>;
> > + interrupt-controller;
> > + #interrupt-cells = <2>;
> > + gpio-ranges = <&pinctrl 0 0 128>;
> > + };
> >
> > --
> > 2.47.0
> >
--
Yixun Lan (dlan)
Gentoo Linux Developer
GPG Key ID AABEFD55
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