linux-kernel - Re: [PATCH] dt-bindings: clock: Convert brcm,bcm2835-cprman to DT schema

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Message-ID: <0ff05575-05d1-424a-9402-2c99588050e1@gmx.net>
Date: Wed, 21 May 2025 10:38:56 +0200
From: Stefan Wahren <wahrenst@....net>
To: "Rob Herring (Arm)" <robh@...nel.org>,
 Michael Turquette <mturquette@...libre.com>, Stephen Boyd
 <sboyd@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
 Conor Dooley <conor+dt@...nel.org>,
 Florian Fainelli <florian.fainelli@...adcom.com>,
 Broadcom internal kernel review list
 <bcm-kernel-feedback-list@...adcom.com>, Ray Jui <rjui@...adcom.com>,
 Scott Branden <sbranden@...adcom.com>
Cc: linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
 linux-rpi-kernel@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] dt-bindings: clock: Convert brcm,bcm2835-cprman to DT
 schema

Hi Rob,

Am 21.05.25 um 02:46 schrieb Rob Herring (Arm):
> Convert the Broadcom BCM2835 CPRMAN clock binding to DT schema format.
> It's a straight forward conversion.
>
> Signed-off-by: Rob Herring (Arm) <robh@...nel.org>
> ---
>   .../bindings/clock/brcm,bcm2835-cprman.txt    | 60 -------------------
>   .../bindings/clock/brcm,bcm2835-cprman.yaml   | 58 ++++++++++++++++++
>   2 files changed, 58 insertions(+), 60 deletions(-)
>   delete mode 100644 Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt
>   create mode 100644 Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.yaml
>
> diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt
> deleted file mode 100644
> index 9e0b03a6519b..000000000000
> --- a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.txt
> +++ /dev/null
> @@ -1,60 +0,0 @@
> -Broadcom BCM2835 CPRMAN clocks
> -
> -This binding uses the common clock binding:
> -    Documentation/devicetree/bindings/clock/clock-bindings.txt
> -
> -The CPRMAN clock controller generates clocks in the audio power domain
> -of the BCM2835.  There is a level of PLLs deriving from an external
> -oscillator, a level of PLL dividers that produce channels off of the
> -few PLLs, and a level of mostly-generic clock generators sourcing from
> -the PLL channels.  Most other hardware components source from the
> -clock generators, but a few (like the ARM or HDMI) will source from
> -the PLL dividers directly.
> -
> -Required properties:
> -- compatible:	should be one of the following,
> -	"brcm,bcm2711-cprman"
> -	"brcm,bcm2835-cprman"
> -- #clock-cells:	Should be <1>. The permitted clock-specifier values can be
> -		  found in include/dt-bindings/clock/bcm2835.h
> -- reg:		Specifies base physical address and size of the registers
> -- clocks:	phandles to the parent clocks used as input to the module, in
> -		  the following order:
> -
> -		  - External oscillator
> -		  - DSI0 byte clock
> -		  - DSI0 DDR2 clock
> -		  - DSI0 DDR clock
> -		  - DSI1 byte clock
> -		  - DSI1 DDR2 clock
> -		  - DSI1 DDR clock
> -
> -		  Only external oscillator is required.  The DSI clocks may
> -		  not be present, in which case their children will be
> -		  unusable.
> -
> -Example:
> -
> -	clk_osc: clock@3 {
> -		compatible = "fixed-clock";
> -		reg = <3>;
> -		#clock-cells = <0>;
> -		clock-output-names = "osc";
> -		clock-frequency = <19200000>;
> -	};
> -
> -	clocks: cprman@...01000 {
> -		compatible = "brcm,bcm2835-cprman";
> -		#clock-cells = <1>;
> -		reg = <0x7e101000 0x2000>;
> -		clocks = <&clk_osc>;
> -	};
> -
> -	i2c0: i2c@...05000 {
> -		compatible = "brcm,bcm2835-i2c";
> -		reg = <0x7e205000 0x1000>;
> -		interrupts = <2 21>;
> -		clocks = <&clocks BCM2835_CLOCK_VPU>;
> -		#address-cells = <1>;
> -		#size-cells = <0>;
> -	};
> diff --git a/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.yaml b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.yaml
> new file mode 100644
> index 000000000000..8586033794ba
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/clock/brcm,bcm2835-cprman.yaml
> @@ -0,0 +1,58 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/clock/brcm,bcm2835-cprman.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Broadcom BCM2835 CPRMAN clocks
> +
> +maintainers:
> +  - Stefan Wahren <wahrenst@....net>
Since I don't have access to the clock documentation, please add

- Raspberry Pi Kernel Maintenance <kernel-list@...pberrypi.com>

except of this

Reviewed-by: Stefan Wahren <wahrenst@....net>