linux-kernel - Re: [PATCH v3 7/8] arm64: dts: qcom: ipq5332: add support for the NSSCC

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Message-ID: <92e9039b-a0e3-4f93-aaa8-226ef9e8b613@linaro.org>
Date:   Thu, 14 Dec 2023 19:18:19 +0100
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Richard Cochran <richardcochran@...il.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>
Cc:     linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH v3 7/8] arm64: dts: qcom: ipq5332: add support for the
 NSSCC



On 12/11/23 14:28, Kathiravan Thirumoorthy wrote:
> 
> 
> On 12/11/2023 4:02 PM, Konrad Dybcio wrote:
>> On 11.12.2023 04:37, Kathiravan Thirumoorthy wrote:
>>> Describe the NSS clock controller node and it's relevant external
>>> clocks.
>>>
>>> Signed-off-by: Kathiravan Thirumoorthy <quic_kathirav@...cinc.com>
>>> ---
>>>   arch/arm64/boot/dts/qcom/ipq5332.dtsi | 28 ++++++++++++++++++++++++++++
>>>   1 file changed, 28 insertions(+)
>>>
>>> diff --git a/arch/arm64/boot/dts/qcom/ipq5332.dtsi b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
>>> index 42e2e48b2bc3..a1504f6c40c1 100644
>>> --- a/arch/arm64/boot/dts/qcom/ipq5332.dtsi
>>> +++ b/arch/arm64/boot/dts/qcom/ipq5332.dtsi
>>> @@ -15,6 +15,18 @@ / {
>>>       #size-cells = <2>;
>>>       clocks {
>>> +        cmn_pll_nss_200m_clk: cmn-pll-nss-200m-clk {
>>> +            compatible = "fixed-clock";
>>> +            clock-frequency = <200000000>;
>>> +            #clock-cells = <0>;
>>> +        };
>>> +
>>> +        cmn_pll_nss_300m_clk: cmn-pll-nss-300m-clk {
>>> +            compatible = "fixed-clock";
>>> +            clock-frequency = <300000000>;
>>> +            #clock-cells = <0>;
>>> +        };
>>> +
>>>           sleep_clk: sleep-clk {
>>>               compatible = "fixed-clock";
>>>               #clock-cells = <0>;
>>> @@ -473,6 +485,22 @@ frame@...8000 {
>>>                   status = "disabled";
>>>               };
>>>           };
>>> +
>>> +        nsscc: clock-controller@...00000{
>> Missing space between the opening curly brace
> 
> My bad :( will fix it in next spin.
> 
>>
>>> +            compatible = "qcom,ipq5332-nsscc";
>>> +            reg = <0x39b00000 0x80000>;
>> the regmap_config in the clk driver has .max_register = 0x800, is this
>> correct?
> 
> As per the memory map, 512KB is the size of this block. However the last register in that region is at the offset 0x800. Shall I update the max_register also to 512KB to keep it consistency?
No, it's fine, I just wanted to know if it's intentional :)

Thanks!

Konrad