@@ -316,6 +316,23 @@
};
};
+
+ /*
+ * 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>; /* Charger temperature */
+ };
+
soc: soc {
#address-cells = <1>;
#size-cells = <1>;
@@ -770,6 +787,52 @@
debounce = <15625>;
pull-up;
};
+
+ xoadc: xoadc@197 {
+ compatible = "qcom,pm8921-adc";
+ reg = <197>;
+ interrupts-extended = <&pmicintc 78 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>;
+ };
+ vph_pwr: adc-channel@04 {
+ reg = <0x00 0x04>;
+ };
+ batt_therm: adc-channel@08 {
+ reg = <0x00 0x08>;
+ };
+ batt_id: adc-channel@09 {
+ reg = <0x00 0x09>;
+ };
+ 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>;
+ };
+ chg_temp: adc-channel@0e {
+ reg = <0x00 0x0e>;
+ };
+ ref_muxoff: adc-channel@0f {
+ reg = <0x00 0x0f>;
+ };
+ };
};
};
This adds the PM8921 XOADC node to the PM8921 PMIC node, defines the 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 Nexus 7 tablet: lsiio Device 000: PM8921-XOADC cd /sys/bus/iio/devices/iio:device0 cat in_voltage10_input 616461 (0.625V reference voltage) cat in_voltage11_input (1.25V reference voltage) cat temp1_input 35852 (die temperature) Cc: John Stultz <john.stultz@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> --- arch/arm/boot/dts/qcom-apq8064.dtsi | 63 +++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) -- 2.14.3 -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html