ARM: dts: qcom: msm8974-hammerhead: add device tree bindings for mpu6515

This patch adds device tree bindings for the mpu6515 to the LG Nexus 5
(hammerhead) phone. Confirmed that the gyroscope / accelerometer
(mpu6515), magnetometer (ak8963), and temperature / pressure (bmp280)
sensors are available on the phone.

Interrupts are not working properly on the ak8963 magnetometer so they
are currently not configured.

The bmp280 retuns temperature/pressure measurement skipped errors but
will reliably work if I run:

    echo 1 > in_pressure_oversampling_ratio
    echo 1 > in_temp_oversampling_ratio

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Andy Gross <andy.gross@linaro.org>

diff --git a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
index c2dc9d0..928affa 100644 (file)
--- a/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
+++ b/arch/arm/boot/dts/qcom-msm8974-lge-nexus5-hammerhead.dts
@@ -241,6 +241,24 @@
                                bias-pull-up;
                        };
                };
+
+               i2c12_pins: i2c12 {
+                       mux {
+                               pins = "gpio87", "gpio88";
+                               function = "blsp_i2c12";
+                               drive-strength = <2>;
+                               bias-disable;
+                       };
+               };
+
+               mpu6515_pin: mpu6515 {
+                       irq {
+                               pins = "gpio73";
+                               function = "gpio";
+                               bias-disable;
+                               input-enable;
+                       };
+               };
        };
 
        sdhci@f9824900 {
@@ -277,6 +295,44 @@
                        linux,code = <KEY_VOLUMEDOWN>;
                };
        };
+
+       i2c@f9968000 {
+               status = "ok";
+               pinctrl-names = "default";
+               pinctrl-0 = <&i2c12_pins>;
+               clock-frequency = <100000>;
+               qcom,src-freq = <50000000>;
+
+               mpu6515@68 {
+                       compatible = "invensense,mpu6515";
+                       reg = <0x68>;
+                       interrupts-extended = <&msmgpio 73 IRQ_TYPE_EDGE_FALLING>;
+                       vddio-supply = <&pm8941_lvs1>;
+
+                       pinctrl-names = "default";
+                       pinctrl-0 = <&mpu6515_pin>;
+
+                       i2c-gate {
+                               #address-cells = <1>;
+                               #size-cells = <0>;
+                               ak8963@f {
+                                       compatible = "asahi-kasei,ak8963";
+                                       reg = <0x0f>;
+                                       // Currently only works in polling mode.
+                                       // gpios = <&msmgpio 61 0>;
+                                       vid-supply = <&pm8941_lvs1>;
+                                       vdd-supply = <&pm8941_l17>;
+                               };
+
+                               bmp280@76 {
+                                       compatible = "bosch,bmp280";
+                                       reg = <0x76>;
+                                       vdda-supply = <&pm8941_lvs1>;
+                                       vddd-supply = <&pm8941_l17>;
+                               };
+                       };
+               };
+       };
 };
 
 &spmi_bus {

diff --git a/arch/arm/boot/dts/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom-msm8974.dtsi
index 9550f06..439ca8c 100644 (file)
--- a/arch/arm/boot/dts/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
@@ -739,6 +739,17 @@
                        dma-names = "tx", "rx";
                };
 
+               blsp_i2c12: i2c@f9968000 {
+                       status = "disabled";
+                       compatible = "qcom,i2c-qup-v2.1.1";
+                       reg = <0xf9968000 0x1000>;
+                       interrupts = <0 106 IRQ_TYPE_NONE>;
+                       clocks = <&gcc GCC_BLSP2_QUP6_I2C_APPS_CLK>, <&gcc GCC_BLSP2_AHB_CLK>;
+                       clock-names = "core", "iface";
+                       #address-cells = <1>;
+                       #size-cells = <0>;
+               };
+
                spmi_bus: spmi@fc4cf000 {
                        compatible = "qcom,spmi-pmic-arb";
                        reg-names = "core", "intr", "cnfg";