linux-kernel - Re: [PATCH RFC 5/6] riscv: dts: thead: Add PVT node

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Message-ID: <aDVxDJi0KkWXiPCK@x1>
Date: Tue, 27 May 2025 01:00:12 -0700
From: Drew Fustini <drew@...7.com>
To: Michal Wilczynski <m.wilczynski@...sung.com>
Cc: Uwe Kleine-König <ukleinek@...nel.org>,
	Miguel Ojeda <ojeda@...nel.org>,
	Alex Gaynor <alex.gaynor@...il.com>,
	Boqun Feng <boqun.feng@...il.com>, Gary Guo <gary@...yguo.net>,
	Björn Roy Baron <bjorn3_gh@...tonmail.com>,
	Benno Lossin <benno.lossin@...ton.me>,
	Andreas Hindborg <a.hindborg@...nel.org>,
	Alice Ryhl <aliceryhl@...gle.com>, Trevor Gross <tmgross@...ch.edu>,
	Danilo Krummrich <dakr@...nel.org>, Guo Ren <guoren@...nel.org>,
	Fu Wei <wefu@...hat.com>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	linux-kernel@...r.kernel.org, linux-pwm@...r.kernel.org,
	rust-for-linux@...r.kernel.org, linux-riscv@...ts.infradead.org,
	devicetree@...r.kernel.org
Subject: Re: [PATCH RFC 5/6] riscv: dts: thead: Add PVT node

On Sat, May 24, 2025 at 11:14:59PM +0200, Michal Wilczynski wrote:
> Add PVT DT node for thermal sensor.
> 
> Signed-off-by: Michal Wilczynski <m.wilczynski@...sung.com>
> ---
>  arch/riscv/boot/dts/thead/th1520.dtsi | 11 +++++++++++
>  1 file changed, 11 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/thead/th1520.dtsi b/arch/riscv/boot/dts/thead/th1520.dtsi
> index f24e12d7259fabcfbdc2dfa966d759db06684ab4..faf5c3aaf209b24cd99ddc377a88e08a8cce24fe 100644
> --- a/arch/riscv/boot/dts/thead/th1520.dtsi
> +++ b/arch/riscv/boot/dts/thead/th1520.dtsi
> @@ -648,6 +648,17 @@ padctrl_aosys: pinctrl@...ff4a000 {
>  			thead,pad-group = <1>;
>  		};
>  
> +		pvt: pvt@...ff4e000 {
> +			compatible = "moortec,mr75203";
> +			reg = <0xff 0xfff4e000 0x0 0x80>,
> +			      <0xff 0xfff4e080 0x0 0x100>,
> +			      <0xff 0xfff4e180 0x0 0x680>,
> +			      <0xff 0xfff4e800 0x0 0x600>;
> +			reg-names = "common", "ts", "pd", "vm";
> +			clocks = <&aonsys_clk>;
> +			#thermal-sensor-cells = <1>;
> +		};
> +
>  		gpio@...ff52000 {
>  			compatible = "snps,dw-apb-gpio";
>  			reg = <0xff 0xfff52000 0x0 0x1000>;
> 
> -- 
> 2.34.1
> 

I found that on my lpi4a that boot while hang after applying this patch.
I think that it is related to clocks as boot finished okay when using
clk_ignore_unused on the kernel cmdline. Do you happen have that in your
kernel cmdline?

I need to investigate further to understand which clocks are causing the
problem.

Thanks,
Drew