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

Brian Masney
2022-12-12T18:25:39Z

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