[PATCH 3/4] arm64: dts: qcom: sa8540p-ride: add qup1_i2c15 and qup2_i2c18 nodes

[Brian Masney <bmasney@redhat.com>]

Add the necessary nodes in order to get qup1_i2c15 and qup2_i2c18
functioning on the automotive board and exposed to userspace.

This work was derived from various patches that Qualcomm delivered
to Red Hat in a downstream kernel. This change was validated by using
i2c-tools 4.3.3 on CentOS Stream 9:

[root@localhost ~]# i2cdetect -l
i2c-15  i2c             Geni-I2C                                I2C adapter
i2c-18  i2c             Geni-I2C                                I2C adapter

[root@localhost ~]# i2cdetect -a -y 15
Warning: Can't use SMBus Quick Write command, will skip some addresses
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:
10:
20:
30: -- -- -- -- -- -- -- --
40:
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60:
70:

Bus 18 has the same output. I validated that we get the same output on
the downstream kernel.

Signed-off-by: Brian Masney <bmasney@redhat.com>
---
 arch/arm64/boot/dts/qcom/sa8540p-ride.dts | 46 +++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
index d70859803fbd..6dc3f3ff8ece 100644
--- a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
+++ b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
@@ -17,6 +17,8 @@ / {
 	compatible = "qcom,sa8540p-ride", "qcom,sa8540p";
 
 	aliases {
+		i2c15 = &qup1_i2c15;
+		i2c18 = &qup2_i2c18;
 		serial0 = &qup2_uart17;
 	};
 
@@ -188,10 +190,28 @@ &pcie3a_phy {
 	status = "okay";
 };
 
+&qup1 {
+	status = "okay";
+};
+
+&qup1_i2c15 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&qup1_i2c15_default>;
+
+	status = "okay";
+};
+
 &qup2 {
 	status = "okay";
 };
 
+&qup2_i2c18 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&qup2_i2c18_default>;
+
+	status = "okay";
+};
+
 &qup2_uart17 {
 	compatible = "qcom,geni-debug-uart";
 	status = "okay";
@@ -313,4 +333,30 @@ wake-pins {
 			bias-pull-up;
 		};
 	};
+
+	qup1_i2c15_default: qup1-i2c15-state {
+		mux-pins {
+			pins = "gpio36", "gpio37";
+			function = "qup15";
+		};
+
+		config-pins {
+			pins = "gpio36", "gpio37";
+			drive-strength = <0x02>;
+			bias-pull-up;
+		};
+	};
+
+	qup2_i2c18_default: qup2-i2c18-state {
+		mux-pins {
+			pins = "gpio66", "gpio67";
+			function = "qup18";
+		};
+
+		config-pins {
+			pins = "gpio66", "gpio67";
+			drive-strength = <0x02>;
+			bias-pull-up;
+		};
+	};
 };
-- 
2.38.1