linux-kernel - Re: [PATCH V5 6/7] arm64: dts: qcom: ipq9574: Add support for nsscc node

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Date: Wed, 26 Jun 2024 21:13:23 +0300
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Devi Priya <quic_devipriy@...cinc.com>
Cc: andersson@...nel.org, mturquette@...libre.com, sboyd@...nel.org, 
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, 
	konrad.dybcio@...aro.org, catalin.marinas@....com, will@...nel.org, p.zabel@...gutronix.de, 
	richardcochran@...il.com, geert+renesas@...der.be, neil.armstrong@...aro.org, 
	arnd@...db.de, m.szyprowski@...sung.com, nfraprado@...labora.com, 
	u-kumar1@...com, linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, netdev@...r.kernel.org
Subject: Re: [PATCH V5 6/7] arm64: dts: qcom: ipq9574: Add support for nsscc
 node

On Wed, Jun 26, 2024 at 08:03:01PM GMT, Devi Priya wrote:
> Add a node for the nss clock controller found on ipq9574 based devices.
> 
> Signed-off-by: Devi Priya <quic_devipriy@...cinc.com>
> ---
>  Changes in V5:
> 	- Dropped interconnects from nsscc node and added 
> 	  interconnect-cells to NSS clock provider so that it can be used
> 	  as icc provider.
> 
>  arch/arm64/boot/dts/qcom/ipq9574.dtsi | 41 +++++++++++++++++++++++++++
>  1 file changed, 41 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/ipq9574.dtsi b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> index 48dfafea46a7..b6f8800bf63c 100644
> --- a/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> +++ b/arch/arm64/boot/dts/qcom/ipq9574.dtsi
> @@ -11,6 +11,8 @@
>  #include <dt-bindings/interconnect/qcom,ipq9574.h>
>  #include <dt-bindings/interrupt-controller/arm-gic.h>
>  #include <dt-bindings/reset/qcom,ipq9574-gcc.h>
> +#include <dt-bindings/clock/qcom,ipq9574-nsscc.h>
> +#include <dt-bindings/reset/qcom,ipq9574-nsscc.h>
>  #include <dt-bindings/thermal/thermal.h>
>  
>  / {
> @@ -19,6 +21,24 @@ / {
>  	#size-cells = <2>;
>  
>  	clocks {
> +		bias_pll_cc_clk: bias-pll-cc-clk {
> +			compatible = "fixed-clock";
> +			clock-frequency = <1200000000>;
> +			#clock-cells = <0>;
> +		};
> +
> +		bias_pll_nss_noc_clk: bias-pll-nss-noc-clk {
> +			compatible = "fixed-clock";
> +			clock-frequency = <461500000>;
> +			#clock-cells = <0>;
> +		};
> +
> +		bias_pll_ubi_nc_clk: bias-pll-ubi-nc-clk {
> +			compatible = "fixed-clock";
> +			clock-frequency = <353000000>;
> +			#clock-cells = <0>;
> +		};

What is the source for these clocks? Is it really an on-board crystal?

> +
>  		sleep_clk: sleep-clk {
>  			compatible = "fixed-clock";
>  			#clock-cells = <0>;
d

-- 
With best wishes
Dmitry