linux-kernel - Re: [PATCH v2 1/3] dt-bindings: gpio: spacemit: add support for K1 SoC

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Message-ID: <20241219221857-GYA3769757@gentoo>
Date: Fri, 20 Dec 2024 06:18:57 +0800
From: Yixun Lan <dlan@...too.org>
To: Conor Dooley <conor@...nel.org>
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>, Yangyu Chen <cyy@...self.name>,
	Jisheng Zhang <jszhang@...nel.org>,
	Jesse Taube <mr.bossman075@...il.com>,
	Inochi Amaoto <inochiama@...look.com>,
	Icenowy Zheng <uwu@...nowy.me>,
	Meng Zhang <zhangmeng.kevin@...cemit.com>,
	Meng Zhang <kevin.z.m@...mail.com>, linux-gpio@...r.kernel.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-riscv@...ts.infradead.org
Subject: Re: [PATCH v2 1/3] dt-bindings: gpio: spacemit: add support for K1
 SoC

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@...too.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@...too.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@...19000 {
> > +        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