From: Amit Kucheria <amit.kucheria@linaro.org>
Date: Wed, 20 Mar 2019 13:39:57 +0000 (+0530)
Subject: arm64: dts: qcom: pms405: calibrate the VADC correctly
X-Git-Tag: v5.15~5870^2~7^2~39
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7c2d4811d11547123bada3330fa2ad9f7ed240af;p=platform%2Fkernel%2Flinux-starfive.git

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
--- 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>;
 			};
 		};