linux-kernel - Re: [PATCH v1 3/3] riscv: dts: starfive: jh7110: Add PLL clock node

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Date:   Thu, 23 Feb 2023 09:52:04 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Xingyu Wu <xingyu.wu@...rfivetech.com>
Cc:     linux-riscv@...ts.infradead.org, devicetree@...r.kernel.org,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Emil Renner Berthing <kernel@...il.dk>,
        Rob Herring <robh+dt@...nel.org>,
        Conor Dooley <conor@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Hal Feng <hal.feng@...rfivetech.com>,
        linux-kernel@...r.kernel.org, linux-clk@...r.kernel.org
Subject: Re: [PATCH v1 3/3] riscv: dts: starfive: jh7110: Add PLL clock node

On 23/02/2023 09:47, Xingyu Wu wrote:
> On 2023/2/22 17:09, Krzysztof Kozlowski wrote:
>> On 21/02/2023 15:11, Xingyu Wu wrote:
>>> Add the PLL clock node for the Starfive JH7110 SoC and
>>> modify the SYSCRG node to add PLL clocks.
>>>
>>> Signed-off-by: Xingyu Wu <xingyu.wu@...rfivetech.com>
>>> ---
>>>  arch/riscv/boot/dts/starfive/jh7110.dtsi | 15 +++++++++++++--
>>>  1 file changed, 13 insertions(+), 2 deletions(-)
>>>
>>> diff --git a/arch/riscv/boot/dts/starfive/jh7110.dtsi b/arch/riscv/boot/dts/starfive/jh7110.dtsi
>>> index b6612c53d0d2..0cb8d86ebce5 100644
>>> --- a/arch/riscv/boot/dts/starfive/jh7110.dtsi
>>> +++ b/arch/riscv/boot/dts/starfive/jh7110.dtsi
>>> @@ -461,12 +461,16 @@ syscrg: clock-controller@...20000 {
>>>  				 <&gmac1_rgmii_rxin>,
>>>  				 <&i2stx_bclk_ext>, <&i2stx_lrck_ext>,
>>>  				 <&i2srx_bclk_ext>, <&i2srx_lrck_ext>,
>>> -				 <&tdm_ext>, <&mclk_ext>;
>>> +				 <&tdm_ext>, <&mclk_ext>,
>>> +				 <&pllclk JH7110_CLK_PLL0_OUT>,
>>> +				 <&pllclk JH7110_CLK_PLL1_OUT>,
>>> +				 <&pllclk JH7110_CLK_PLL2_OUT>;
>>>  			clock-names = "osc", "gmac1_rmii_refin",
>>>  				      "gmac1_rgmii_rxin",
>>>  				      "i2stx_bclk_ext", "i2stx_lrck_ext",
>>>  				      "i2srx_bclk_ext", "i2srx_lrck_ext",
>>> -				      "tdm_ext", "mclk_ext";
>>> +				      "tdm_ext", "mclk_ext",
>>> +				      "pll0_out", "pll1_out", "pll2_out";
>>>  			#clock-cells = <1>;
>>>  			#reset-cells = <1>;
>>>  		};
>>> @@ -476,6 +480,13 @@ sys_syscon: syscon@...30000 {
>>>  			reg = <0x0 0x13030000 0x0 0x1000>;
>>>  		};
>>>  
>>> +		pllclk: pll-clock-controller {
>>
>> Does not look like you tested the DTS against bindings. Please run `make
>> dtbs_check` (see Documentation/devicetree/bindings/writing-schema.rst
>> for instructions). You should see here warnings of mixing non-MMIO nodes
>> in MMIO-bus.
>>
> 
> Oh I cherry-pick the commit of syscon node and it also include the MMC node.
> I will remove the MMC node. 
> I used dtbs_check and get the error 'should not be valid under {'type': 'object'}',
> If I move this node out of the 'soc' node, the dtbs_check will be pass.
> Is it OK to move the PLL node out of the 'soc' node? Thanks.

Shall it be out side of soc? How it can then do anything with registers?
This does not look like correct representation of hardware.

Best regards,
Krzysztof