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Date:   Tue, 3 Jul 2018 14:48:22 -0700
From:   Matthias Kaehlcke <mka@chromium.org>
To:     Amit Kucheria <amit.kucheria@linaro.org>
Cc:     linux-kernel@vger.kernel.org, rnayak@codeaurora.org,
        linux-arm-msm@vger.kernel.org, bjorn.andersson@linaro.org,
        edubezval@gmail.com, smohanad@codeaurora.org,
        vivek.gautam@codeaurora.org, andy.gross@linaro.org,
        David Brown <david.brown@linaro.org>,
        Rob Herring <robh+dt@kernel.org>,
        Mark Rutland <mark.rutland@arm.com>,
        Catalin Marinas <catalin.marinas@arm.com>,
        Will Deacon <will.deacon@arm.com>, linux-soc@vger.kernel.org,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        Douglas Anderson <dianders@chromium.org>
Subject: Re: [PATCH v4 6/6] arm64: dts: sdm845: Add tsens nodes
Message-ID: <20180703214822.GD129942@google.com>
References: <cover.1530533998.git.amit.kucheria@linaro.org>
 <a52b77ad84867774a0659f51ccb79b17ba7638ab.1530533998.git.amit.kucheria@linaro.org>
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Hi,

On Mon, Jul 02, 2018 at 06:14:09PM +0530, Amit Kucheria wrote:
> SDM845 has two tsens blocks, one with 13 sensors and the other with 8
> sensors.
> 
> Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
> ---
>  arch/arm64/boot/dts/qcom/sdm845.dtsi | 16 ++++++++++++++++
>  1 file changed, 16 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845.dtsi b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> index cdaabeb..edf8505 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845.dtsi
> @@ -221,6 +221,22 @@
>  			#interrupt-cells = <2>;
>  		};
>  
> +		tsens0: tsens@c222000 {
> +			compatible = "qcom,tsens-v2.4.0", "qcom,tsens-v2";
> +			reg = <0xc263000 0x1ff>, /* TM */
> +			      <0xc222000 0x1ff>; /* SROT */
> +			#qcom,sensors = <13>;
> +			#thermal-sensor-cells = <1>;
> +		};
> +
> +		tsens1: tsens@c223000 {
> +			compatible = "qcom,tsens-v2.4.0", "qcom,tsens-v2";
> +			reg = <0xc265000 0x1ff>, /* TM */
> +			      <0xc223000 0x1ff>; /* SROT */
> +			#qcom,sensors = <8>;
> +			#thermal-sensor-cells = <1>;
> +		};
> +
>  		spmi_bus: spmi@c440000 {
>  			compatible = "qcom,spmi-pmic-arb";
>  			reg = <0xc440000 0x1100>,

I tested this series on an SDM845 board. Temperatures can be read from
the tsens0 sensors, however for tsens1 sensors I get:

cat temp
cat: temp: No data available

TRDY_READY_BIT set when reading TRDY_OFFSET in get_temp_tsens_v2().
Unfortunately I currently have no documentation of the registers or the
thermal sensors in general and couldn't investigate further.

Any idea what could be the problem?

Thanks

Matthias