[PATCH] arm64: dts: qcom: msm8916-longcheer-l8150: Add missing sensor interrupts

* [PATCH] arm64: dts: qcom: msm8916-longcheer-l8150: Add missing sensor interrupts
@ 2021-08-16 12:35 Stephan Gerhold
  2021-09-27 22:56 ` (subset) " Bjorn Andersson
  2021-09-27 23:00 ` patchwork-bot+linux-arm-msm
  0 siblings, 2 replies; 3+ messages in thread
From: Stephan Gerhold @ 2021-08-16 12:35 UTC (permalink / raw)
  To: Bjorn Andersson
  Cc: Andy Gross, linux-arm-msm, devicetree, ~postmarketos/upstreaming,
	Stephan Gerhold, Nikita Travkin

So far there were no interrupts set up for the BMC150 accelerometer
+ magnetometer combo because they were broken for some reason.
It turns out Longcheer L8150 actually has a BMC156 which is very similar
to BMC150, but only has an INT2 pin for the accelerometer part.

This requires some minor changes in the bmc150-accel driver which is now
supported by using the more correct bosch,bmc156_accel compatible.
Unfortunately it looks like even INT2 is not functional on most boards
because the interrupt line is not actually connected to the BMC156.
However, there are two pads next to the chip that can be shorted
to make it work if needed.

While at it, add the missing interrupts for the magnetometer part
and extra BMG160 gyroscope, those seem to work without any problems.
Also correct the magnetometer compatible to bosch,bmc156_magn for clarity
(no functional difference for the magnetometer part).

Tested-by: Nikita Travkin <nikita@trvn.ru>
Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
 .../boot/dts/qcom/msm8916-longcheer-l8150.dts | 43 +++++++++++++++++--
 1 file changed, 39 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/qcom/msm8916-longcheer-l8150.dts b/arch/arm64/boot/dts/qcom/msm8916-longcheer-l8150.dts
index 1e893c0b6fbc..30716eb8fb2d 100644
--- a/arch/arm64/boot/dts/qcom/msm8916-longcheer-l8150.dts
+++ b/arch/arm64/boot/dts/qcom/msm8916-longcheer-l8150.dts
@@ -121,9 +121,21 @@ &blsp_i2c2 {
 	status = "okay";
 
 	accelerometer@10 {
-		compatible = "bosch,bmc150_accel";
+		compatible = "bosch,bmc156_accel";
 		reg = <0x10>;
 
+		/*
+		 * For some reason the interrupt line is usually not connected
+		 * to the BMC156. However, there are two pads next to the chip
+		 * that can be shorted to make it work if needed.
+		 *
+		 * interrupt-parent = <&msmgpio>;
+		 * interrupts = <116 IRQ_TYPE_EDGE_RISING>;
+		 */
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&accel_int_default>;
+
 		vdd-supply = <&pm8916_l17>;
 		vddio-supply = <&pm8916_l6>;
 
@@ -133,9 +145,15 @@ accelerometer@10 {
 	};
 
 	magnetometer@12 {
-		compatible = "bosch,bmc150_magn";
+		compatible = "bosch,bmc156_magn";
 		reg = <0x12>;
 
+		interrupt-parent = <&msmgpio>;
+		interrupts = <113 IRQ_TYPE_EDGE_RISING>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&magn_int_default>;
+
 		vdd-supply = <&pm8916_l17>;
 		vddio-supply = <&pm8916_l6>;
 	};
@@ -145,7 +163,8 @@ gyroscope@68 {
 		reg = <0x68>;
 
 		interrupt-parent = <&msmgpio>;
-		interrupts = <23 IRQ_TYPE_EDGE_RISING>;
+		interrupts = <23 IRQ_TYPE_EDGE_RISING>,
+			     <22 IRQ_TYPE_EDGE_RISING>;
 
 		pinctrl-names = "default";
 		pinctrl-0 = <&gyro_int_default>;
@@ -336,6 +355,14 @@ l18 {
 };
 
 &msmgpio {
+	accel_int_default: accel-int-default {
+		pins = "gpio116";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
 	camera_flash_default: camera-flash-default {
 		pins = "gpio31", "gpio32";
 		function = "gpio";
@@ -361,7 +388,15 @@ gpio_keys_default: gpio-keys-default {
 	};
 
 	gyro_int_default: gyro-int-default {
-		pins = "gpio23";
+		pins = "gpio22", "gpio23";
+		function = "gpio";
+
+		drive-strength = <2>;
+		bias-disable;
+	};
+
+	magn_int_default: magn-int-default {
+		pins = "gpio113";
 		function = "gpio";
 
 		drive-strength = <2>;
-- 
2.32.0


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