arm64: dts: qcom: pms405: calibrate the VADC correctly

Set the qcom,ratiometric property to make the VADC use the VDD reference
(1.875V) and GND for channel calibration of the temperature channels
instead of 1.25V. Allow a 200us delay between the AMUX configuration and
ADC starting conversion using qcom,hw-settle-time as described in
documentation.

Fixes: 041b9a7b9fdb ("arm64: dts: pms405: Export PMIC temperature to thermal framework")
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <agross@kernel.org>

diff --git a/arch/arm64/boot/dts/qcom/pms405.dtsi b/arch/arm64/boot/dts/qcom/pms405.dtsi
index e8e186b..a3d5db0 100644 (file)
--- a/arch/arm64/boot/dts/qcom/pms405.dtsi
+++ b/arch/arm64/boot/dts/qcom/pms405.dtsi
@@ -110,16 +110,22 @@
 
                        xo_therm_100k_pu {
                                reg = <ADC5_XO_THERM_100K_PU>;
+                               qcom,ratiometric;
+                               qcom,hw-settle-time = <200>;
                                qcom,pre-scaling = <1 1>;
                        };
 
                        amux_thm1_100k_pu {
                                reg = <ADC5_AMUX_THM1_100K_PU>;
+                               qcom,ratiometric;
+                               qcom,hw-settle-time = <200>;
                                qcom,pre-scaling = <1 1>;
                        };
 
                        amux_thm3_100k_pu {
                                reg = <ADC5_AMUX_THM3_100K_PU>;
+                               qcom,ratiometric;
+                               qcom,hw-settle-time = <200>;
                                qcom,pre-scaling = <1 1>;
                        };
                };