Commit 7c2d4811 authored Mar 20, 2019 by Amit Kucheria Committed by Andy Gross May 29, 2019

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: 041b9a7b ("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>

parent 14d27be1

arch/arm64/boot/dts/qcom/pms405.dtsi

+6 −0

Original line number	Diff line number	Diff line
		@@ -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>;
		};
		};

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