linux-kernel - Re: [PATCH v4 6/6] arm64: dts: sdm845: Add tsens nodes

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Date:   Mon, 9 Jul 2018 16:56:51 +0530
From:   Amit Kucheria <amit.kucheria@...aro.org>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     LKML <linux-kernel@...r.kernel.org>,
        Rajendra Nayak <rnayak@...eaurora.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Eduardo Valentin <edubezval@...il.com>,
        smohanad@...eaurora.org,
        Vivek Gautam <vivek.gautam@...eaurora.org>,
        Andy Gross <andy.gross@...aro.org>,
        David Brown <david.brown@...aro.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>,
        "open list:ARM/QUALCOMM SUPPORT" <linux-soc@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        lakml <linux-arm-kernel@...ts.infradead.org>,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH v4 6/6] arm64: dts: sdm845: Add tsens nodes

On Wed, Jul 4, 2018 at 3:18 AM, Matthias Kaehlcke <mka@...omium.org> wrote:
> 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@...aro.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@...2000 {
>> +                     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@...3000 {
>> +                     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@...0000 {
>>                       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?

Strangely enough, I'm seeing this now after rebuilding my integration
branch to test some other bits.

I've sent another version with this patch removed while I investigate
this. Could you check if you're able to read all 8 sensors with v5?

Regards,
Amit