ARM: dts: add XOADC and IIO HWMON to MSM8660/APQ8060

This adds the PM8058 XOADC node to the PM8058 PMIC node,
defines the 16 channels and further also define an IIO HWMON
node for the channels that are used for housekeeping of
voltages and die temperature for the PMIC chip die.

Tested on the APQ8060 DragonBoard:
cd /sys/class/hwmon/hwmon0
cat in2_input
4773 (DC mains ~5V)
cat in4_input
625  (0.625V reference voltage)
cat in5_input
1250 (1.25V reference voltage)
cat temp1_input
35852 (die temperature)

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

diff --git a/arch/arm/boot/dts/qcom-msm8660.dtsi b/arch/arm/boot/dts/qcom-msm8660.dtsi
index 747669a62aa82ff9520b9f3d0bb1f9210b7714c5..f5631e810e9d56755e532ace17fa32d9408ffe79 100644 (file)
--- a/arch/arm/boot/dts/qcom-msm8660.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8660.dtsi
@@ -63,6 +63,22 @@
                };
        };
 
+       /*
+        * These channels from the ADC are simply hardware monitors.
+        * That is why the ADC is referred to as "HKADC" - HouseKeeping
+        * ADC.
+        */
+       iio-hwmon {
+               compatible = "iio-hwmon";
+               io-channels = <&xoadc 0x00 0x01>, /* Battery */
+                           <&xoadc 0x00 0x02>, /* DC in (charger) */
+                           <&xoadc 0x00 0x04>, /* VPH the main system voltage */
+                           <&xoadc 0x00 0x0b>, /* Die temperature */
+                           <&xoadc 0x00 0x0c>, /* Reference voltage 1.25V */
+                           <&xoadc 0x00 0x0d>, /* Reference voltage 0.625V */
+                           <&xoadc 0x00 0x0e>; /* Reference voltage 0.325V */
+       };
+
        soc: soc {
                #address-cells = <1>;
                #size-cells = <1>;
@@ -267,6 +283,49 @@
                                        row-hold = <91500>;
                                };
 
+                               xoadc: xoadc@197 {
+                                       compatible = "qcom,pm8058-adc";
+                                       reg = <0x197>;
+                                       interrupts-extended = <&pm8058 76 IRQ_TYPE_EDGE_RISING>;
+                                       #address-cells = <2>;
+                                       #size-cells = <0>;
+                                       #io-channel-cells = <2>;
+
+                                       vcoin: adc-channel@00 {
+                                               reg = <0x00 0x00>;
+                                       };
+                                       vbat: adc-channel@01 {
+                                               reg = <0x00 0x01>;
+                                       };
+                                       dcin: adc-channel@02 {
+                                               reg = <0x00 0x02>;
+                                       };
+                                       ichg: adc-channel@03 {
+                                               reg = <0x00 0x03>;
+                                       };
+                                       vph_pwr: adc-channel@04 {
+                                               reg = <0x00 0x04>;
+                                       };
+                                       usb_vbus: adc-channel@0a {
+                                               reg = <0x00 0x0a>;
+                                       };
+                                       die_temp: adc-channel@0b {
+                                               reg = <0x00 0x0b>;
+                                       };
+                                       ref_625mv: adc-channel@0c {
+                                               reg = <0x00 0x0c>;
+                                       };
+                                       ref_1250mv: adc-channel@0d {
+                                               reg = <0x00 0x0d>;
+                                       };
+                                       ref_325mv: adc-channel@0e {
+                                               reg = <0x00 0x0e>;
+                                       };
+                                       ref_muxoff: adc-channel@0f {
+                                               reg = <0x00 0x0f>;
+                                       };
+                               };
+
                                rtc@1e8 {
                                        compatible = "qcom,pm8058-rtc";
                                        reg = <0x1e8>;