linux-kernel - Re: [PATCH v2 2/2] phy: dw-dphy-rx: Add dt bindings for Synopsys MIPI D-PHY RX

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Message-ID: <aG87Vjo5IwTBkp3H@lizhi-Precision-Tower-5810>
Date: Thu, 10 Jul 2025 00:02:30 -0400
From: Frank Li <Frank.li@....com>
To: Karthik Poduval <kpoduval@...126.com>
Cc: jyxiong@...zon.com, miguel.lopes@...opsys.com, anishkmr@...zon.com,
	vkoul@...nel.org, kishon@...nel.org, linux-kernel@...r.kernel.org,
	linux-phy@...ts.infradead.org, robh@...nel.org, krzk+dt@...nel.org,
	conor+dt@...nel.org, devicetree@...r.kernel.org
Subject: Re: [PATCH v2 2/2] phy: dw-dphy-rx: Add dt bindings for Synopsys
 MIPI D-PHY RX

On Wed, Jul 09, 2025 at 07:42:21PM -0700, Karthik Poduval wrote:
> Add DT Bindings for Synopsys D-PHY RX, presently tested on version 1.2
>
> Signed-off-by: Karthik Poduval <kpoduval@...126.com>
> ---
>  .../bindings/phy/snps,dw-dphy-rx.yaml         | 44 +++++++++++++++++++
>  MAINTAINERS                                   |  7 +++
>  2 files changed, 51 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/phy/snps,dw-dphy-rx.yaml
>
> diff --git a/Documentation/devicetree/bindings/phy/snps,dw-dphy-rx.yaml b/Documentation/devicetree/bindings/phy/snps,dw-dphy-rx.yaml
> new file mode 100644
> index 000000000000..c3c657b1e77d
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/snps,dw-dphy-rx.yaml
> @@ -0,0 +1,44 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/snps,dw-dphy-rx.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Synopsys Designware MIPI D-PHY RX
> +
> +maintainers:
> +  - Karthik Poduval <kpoduval@...126.com>
> +  - Jason Xiong <jyxiong@...zon.com>
> +  - Miguel Lopes <miguel.lopes@...opsys.com
> +
> +description: |

Needn't |

> +  These are the bindings for Synopsys Designware MIPI DPHY RX phy driver.
> +  Currently only supported phy version is v1.2.
> +
> +properties:
> +  compatible:
> +    const: snps,dw-dphy-1p2
> +
> +  '#phy-cells':
> +    const: 0
> +
> +  reg:
> +    minItems: 2
> +    maxItems: 2

items:
  - description: ....
  - description: ....

Not all dphy have second register.

> +
> +required:
> +  - compatible
> +  - '#phy-cells'
> +  - reg
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    dw_dphy_rx: dw-dphy@...000040 {
> +        compatible = "snps,dw-dphy-1p2";
> +        #phy-cells = <0>;
> +        reg = <0x0 0x90000040 0x0 0x20>, <0x0 0x90001000 0x0 0x8>;

Some DW MIPI CSI2 test1/test2 register is not tail part of whole MMIO space

such as imx93.

Frank
> +        status = "disabled";
> +    };
> +
> diff --git a/MAINTAINERS b/MAINTAINERS
> index b5a472a544cf..5fd5a92431bd 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -24217,6 +24217,13 @@ S:	Maintained
>  F:	Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml
>  F:	drivers/dma/dw-axi-dmac/
>
> +SYNOPSYS DESIGNWARE MIPI D-PHY RX DRIVER
> +M:	Karthik Poduval <kpoduval@...126.com>
> +M:	Jason Xiong <jyxiong@...zon.com>
> +M:	Miguel Lopes <miguel.lopes@...opsys.com>
> +S:	Supported
> +F:	Documentation/devicetree/bindings/phy/snps,dw-dphy-rx.yaml
> +
>  SYNOPSYS DESIGNWARE DMAC DRIVER
>  M:	Viresh Kumar <vireshk@...nel.org>
>  R:	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
> --
> 2.43.0
>