[PATCH v2 2/7] ARM: dts: qcom: msm8974-hammerhead: add device tree bindings for mpu6515

Brian Masney
2018-07-17T08:42:52Z

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>
---
I'll send follow up patch(es) once I investigate why the skipped errors
are occurring with the bmp280 with the default oversampling ratios.

.../qcom-msm8974-lge-nexus5-hammerhead.dts | 56 +++++++++++++++++++
arch/arm/boot/dts/qcom-msm8974.dtsi | 11 ++++
2 files changed, 67 insertions(+)

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 c2dc9d09484a..928affae1885 100644
--- 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 d9019a49b292..cebb6ae9143a 100644
--- a/arch/arm/boot/dts/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom-msm8974.dtsi
@@ -737,6 +737,17 @@
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";
--
2.17.1