linux-kernel - Re: [PATCH v2 6/8] dt-bindings: mfd: Add img,boston-platform-regs

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Message-Id: <bbbd52c2-aaf2-4777-bee4-855d805923b5@app.fastmail.com>
Date: Thu, 13 Jun 2024 20:31:46 +0100
From: "Jiaxun Yang" <jiaxun.yang@...goat.com>
To: "Rob Herring" <robh@...nel.org>
Cc: "Lee Jones" <lee@...nel.org>, "Krzysztof Kozlowski" <krzk+dt@...nel.org>,
 "Conor Dooley" <conor+dt@...nel.org>,
 "paulburton@...nel.org" <paulburton@...nel.org>,
 "Thomas Bogendoerfer" <tsbogend@...ha.franken.de>,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 "linux-mips@...r.kernel.org" <linux-mips@...r.kernel.org>
Subject: Re: [PATCH v2 6/8] dt-bindings: mfd: Add img,boston-platform-regs



在2024年6月13日六月 下午8:04，Rob Herring写道：
> On Wed, Jun 12, 2024 at 12:56:25PM +0100, Jiaxun Yang wrote:
>> This compatible has been used in arch/mips/boot/dts/img/boston.dts
>> for a while but never documented properly.
>> 
>> Write a new binding for this device.
>> This also covers old img,boston-clock binding so remove that binding.
>> 
>> Signed-off-by: Jiaxun Yang <jiaxun.yang@...goat.com>
>> ---
>>  .../devicetree/bindings/clock/img,boston-clock.txt | 31 ---------
>>  .../bindings/mfd/img,boston-platform-regs.yaml     | 74 ++++++++++++++++++++++
>>  2 files changed, 74 insertions(+), 31 deletions(-)
>> 
>> diff --git a/Documentation/devicetree/bindings/clock/img,boston-clock.txt b/Documentation/devicetree/bindings/clock/img,boston-clock.txt
>> deleted file mode 100644
>> index 7bc5e9ffb624..000000000000
>> --- a/Documentation/devicetree/bindings/clock/img,boston-clock.txt
>> +++ /dev/null
>> @@ -1,31 +0,0 @@
>> -Binding for Imagination Technologies MIPS Boston clock sources.
>> -
>> -This binding uses the common clock binding[1].
>> -
>> -[1] Documentation/devicetree/bindings/clock/clock-bindings.txt
>> -
>> -The device node must be a child node of the syscon node corresponding to the
>> -Boston system's platform registers.
>> -
>> -Required properties:
>> -- compatible : Should be "img,boston-clock".
>> -- #clock-cells : Should be set to 1.
>> -  Values available for clock consumers can be found in the header file:
>> -    <dt-bindings/clock/boston-clock.h>
>> -
>> -Example:
>> -
>> -	system-controller@...fd000 {
>> -		compatible = "img,boston-platform-regs", "syscon";
>> -		reg = <0x17ffd000 0x1000>;
>> -
>> -		clk_boston: clock {
>> -			compatible = "img,boston-clock";
>> -			#clock-cells = <1>;
>> -		};
>> -	};
>> -
>> -	uart0: uart@...fe000 {
>> -		/* ... */
>> -		clocks = <&clk_boston BOSTON_CLK_SYS>;
>> -	};
>> diff --git a/Documentation/devicetree/bindings/mfd/img,boston-platform-regs.yaml b/Documentation/devicetree/bindings/mfd/img,boston-platform-regs.yaml
>> new file mode 100644
>> index 000000000000..bf94de38a89f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mfd/img,boston-platform-regs.yaml
>> @@ -0,0 +1,74 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mfd/img,boston-platform-regs.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Imagination Technologies Boston Platform Registers
>> +
>> +maintainers:
>> +  - Jiaxun Yang <jiaxun.yang@...goat.com>
>> +
>> +properties:
>> +  compatible:
>> +    items:
>> +      - const: img,boston-platform-regs
>> +      - const: syscon
>> +      - const: simple-mfd
>
> Why did you add 'simple-mfd'? That's not what is in use.
>

U-Boot needs this to probe sub-nodes such as reboot and clock :-(

I had updated dts in an earlier patch of this series.

Thanks
>>

-- 
- Jiaxun