lkml.org 
[lkml]   [2018]   [Jul]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[PATCH v7 5/7] dt: thermal: tsens: Document the fallback DT property for v2 of TSENS IP
    Date
    We want to create common code for v2 of the TSENS IP block that is used in
    a large number of Qualcomm SoCs. "qcom,tsens-v2" should be able to handle
    most of the common functionality start with a common get_temp() function.

    It is also necessary to split out the memory regions for the TM and SROT
    register banks because their offsets are not constant across SoC families.

    Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
    Reviewed-by: Rob Herring <robh@kernel.org>
    Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
    Tested-by: Matthias Kaehlcke <mka@chromium.org>
    ---
    .../devicetree/bindings/thermal/qcom-tsens.txt | 31 +++++++++++++++++-----
    1 file changed, 25 insertions(+), 6 deletions(-)

    diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
    index 06195e8..b5312a8 100644
    --- a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
    +++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt
    @@ -1,18 +1,28 @@
    * QCOM SoC Temperature Sensor (TSENS)

    Required properties:
    -- compatible :
    - - "qcom,msm8916-tsens" : For 8916 Family of SoCs
    - - "qcom,msm8974-tsens" : For 8974 Family of SoCs
    - - "qcom,msm8996-tsens" : For 8996 Family of SoCs
    +- compatible:
    + Must be one of the following:
    + - "qcom,msm8916-tsens" (MSM8916)
    + - "qcom,msm8974-tsens" (MSM8974)
    + - "qcom,msm8996-tsens" (MSM8996)
    + - "qcom,msm8998-tsens", "qcom,tsens-v2" (MSM8998)
    + - "qcom,sdm845-tsens", "qcom,tsens-v2" (SDM845)
    + The generic "qcom,tsens-v2" property must be used as a fallback for any SoC
    + with version 2 of the TSENS IP. MSM8996 is the only exception beacause the
    + generic property did not exist when support was added.
    +
    +- reg: Address range of the thermal registers.
    + New platforms containing v2.x.y of the TSENS IP must specify the SROT and TM
    + register spaces separately, with order being TM before SROT.
    + See Example 2, below.

    -- reg: Address range of the thermal registers
    - #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description.
    - #qcom,sensors: Number of sensors in tsens block
    - Refer to Documentation/devicetree/bindings/nvmem/nvmem.txt to know how to specify
    nvmem cells

    -Example:
    +Example 1 (legacy support before a fallback tsens-v2 propoerty was introduced):
    tsens: thermal-sensor@900000 {
    compatible = "qcom,msm8916-tsens";
    reg = <0x4a8000 0x2000>;
    @@ -20,3 +30,12 @@ tsens: thermal-sensor@900000 {
    nvmem-cell-names = "caldata", "calsel";
    #thermal-sensor-cells = <1>;
    };
    +
    +Example 2 (for any platform containing v2 of the TSENS IP):
    +tsens0: thermal-sensor@c263000 {
    + compatible = "qcom,sdm845-tsens", "qcom,tsens-v2";
    + reg = <0xc263000 0x1ff>, /* TM */
    + <0xc222000 0x1ff>; /* SROT */
    + #qcom,sensors = <13>;
    + #thermal-sensor-cells = <1>;
    + };
    --
    2.7.4
    \
     
     \ /
      Last update: 2018-07-15 22:05    [W:4.160 / U:0.796 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site