linux-kernel - Re: [PATCH v7 1/4] dt-bindings: soc: sophgo: Add Sophgo system control module

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Date: Mon, 8 Jan 2024 15:20:46 +0800
From: Chen Wang <unicorn_wang@...look.com>
To: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
 Chen Wang <unicornxw@...il.com>, aou@...s.berkeley.edu, chao.wei@...hgo.com,
 conor@...nel.org, krzysztof.kozlowski+dt@...aro.org,
 mturquette@...libre.com, palmer@...belt.com, paul.walmsley@...ive.com,
 richardcochran@...il.com, robh+dt@...nel.org, sboyd@...nel.org,
 devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
 haijiao.liu@...hgo.com, xiaoguang.xing@...hgo.com, guoren@...nel.org,
 jszhang@...nel.org, inochiama@...look.com, samuel.holland@...ive.com
Subject: Re: [PATCH v7 1/4] dt-bindings: soc: sophgo: Add Sophgo system
 control module


On 2024/1/8 15:03, Krzysztof Kozlowski wrote:
> On 08/01/2024 07:48, Chen Wang wrote:
>> From: Chen Wang <unicorn_wang@...look.com>
>>
>> Add documentation to describe Sophgo System Controller for SG2042.
>>
>> Signed-off-by: Chen Wang <unicorn_wang@...look.com>
>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> ---
>>   .../soc/sophgo/sophgo,sg2042-sysctrl.yaml     | 34 +++++++++++++++++++
>>   1 file changed, 34 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/soc/sophgo/sophgo,sg2042-sysctrl.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/soc/sophgo/sophgo,sg2042-sysctrl.yaml b/Documentation/devicetree/bindings/soc/sophgo/sophgo,sg2042-sysctrl.yaml
>> new file mode 100644
>> index 000000000000..1ec1eaa55598
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/soc/sophgo/sophgo,sg2042-sysctrl.yaml
>> @@ -0,0 +1,34 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/soc/sophgo/sophgo,sg2042-sysctrl.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Sophgo SG2042 SoC system controller
>> +
>> +maintainers:
>> +  - Chen Wang <unicorn_wang@...look.com>
>> +
>> +description:
>> +  The Sophgo SG2042 SoC system controller provides register information such
>> +  as offset, mask and shift that can be used by other modules, such as clocks.
> "offset, mask and shift" is not a register information stored in
> syscons. Are you really sure, that your system controller hardware
> stores offsets of some other registers?
>
> Show as some example of such offsets, masks and shifts provided by this
> hardware.

The system control module is defined here: 
https://github.com/sophgo/sophgo-doc/blob/main/SG2042/TRM/source/system-control.rst. 
It contains some registers related to pll and gates.

Some other clocks registars are defined in 
https://github.com/sophgo/sophgo-doc/blob/main/SG2042/TRM/source/clock.rst.

memory-map is defined in 
https://github.com/sophgo/sophgo-doc/blob/main/SG2042/TRM/source/mmap.rst

>
>
> Best regards,
> Krzysztof
>