diff options
| author | Ram Prakash Gupta <rampraka@codeaurora.org> | 2018-07-23 12:02:51 +0530 |
|---|---|---|
| committer | Ram Prakash Gupta <rampraka@codeaurora.org> | 2018-07-24 17:50:36 +0530 |
| commit | 24e44f04e9588864f7caefe9676b109f7dd55921 (patch) | |
| tree | fbb815cf09b41ebc498edd23a403e2526a0d7d1d | |
| parent | 595eeed39838e4f975fc1329e500694d8e4b83ea (diff) | |
ARM: dts: msm: add dt entry to control scaling based on temperature
At lower temperatures (<-40degree), SDHC DLL is failing to lock on
RadagastAU target which is leading to CRC issues with SD card in
SDR104 mode.
As workaround to this hardware issue, software is avoiding running
SD card in SDR104 mode at lower temperatures.
Adding dt entries to sdhci node for getting temperature sensor ids
and threshold values for supporting temperature based clock scaling.
Change-Id: I1b3877ba47090a6f9cd3321bfc5e97fd3de99372
Signed-off-by: Ram Prakash Gupta <rampraka@codeaurora.org>
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/sdhci-msm.txt | 12 | ||||
| -rw-r--r-- | arch/arm/boot/dts/qcom/msm8996pro-auto-adp.dts | 9 |
2 files changed, 21 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt index 9916c34e62b8..380e8453b4ce 100644 --- a/Documentation/devicetree/bindings/mmc/sdhci-msm.txt +++ b/Documentation/devicetree/bindings/mmc/sdhci-msm.txt @@ -113,6 +113,18 @@ In the following, <supply> can be vdd (flash core voltage) or vdd-io (I/O voltag - qcom,wakeup-on-idle: if configured, the mmcqd thread will call set_wake_up_idle(), thereby voting for it to be called on idle CPUs. + - qcom,late-sdhci-msm: if configured, the sdhci probe will be called in + late_init() call context and probe will be delayed. + + - qcom,tsens-id: temperature sensor id which is closest to SDC host controller. + + - qcom,disable_scaling_threshold_temp: temperature value at which scaling is + disabled if the temperature falls below this temperature. + + - qcom,enable_scaling_threshold_temp: temperature value at which scaling is + enabled, when the scaling is disabled, if temperature rises above this + temperature. + Example: aliases { diff --git a/arch/arm/boot/dts/qcom/msm8996pro-auto-adp.dts b/arch/arm/boot/dts/qcom/msm8996pro-auto-adp.dts index 05a3144fb312..cb7bc50a17a6 100644 --- a/arch/arm/boot/dts/qcom/msm8996pro-auto-adp.dts +++ b/arch/arm/boot/dts/qcom/msm8996pro-auto-adp.dts @@ -69,11 +69,20 @@ }; }; +&sdhc_1 { + qcom,tsens-id = <0>; +}; + &sdhc_2 { + compatible = "qcom,late-sdhci-msm"; + cd-gpios = <&tlmm 38 GPIO_ACTIVE_LOW>; pinctrl-0 = <&sdc2_clk_on &sdc2_cmd_on &sdc2_data_on &sdc2_cd_on_sbc>; pinctrl-1 = <&sdc2_clk_off &sdc2_cmd_off &sdc2_data_off &sdc2_cd_on_sbc>; + qcom,tsens-id = <10>; + qcom,disable_scaling_threshold_temp = <(-15)>; + qcom,enable_scaling_threshold_temp = <(-5)>; }; &i2c_7 { |