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From:   Brian Masney <bmasney@redhat.com>
To:     andersson@kernel.org, krzysztof.kozlowski+dt@linaro.org
Cc:     quic_shazhuss@quicinc.com, robh+dt@kernel.org,
        konrad.dybcio@linaro.org, johan+linaro@kernel.org,
        linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, ahalaney@redhat.com,
        echanude@redhat.co
Subject: [PATCH v4 08/10] arm64: dts: qcom: sa8540p-ride: add i2c nodes
Date:   Tue,  3 Jan 2023 13:22:27 -0500
Message-Id: <20230103182229.37169-9-bmasney@redhat.com>
In-Reply-To: <20230103182229.37169-1-bmasney@redhat.com>
References: <20230103182229.37169-1-bmasney@redhat.com>
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Add the necessary nodes in order to get i2c0, i2c1, i2c12, i2c15, and
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-0  i2c             Geni-I2C                                I2C adapter
i2c-1  i2c             Geni-I2C                                I2C adapter
i2c-12 i2c             Geni-I2C                                I2C adapter
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:

Signed-off-by: Brian Masney <bmasney@redhat.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Tested-by: Shazad Hussain <quic_shazhuss@quicinc.com>
---
No changes in v4

 arch/arm64/boot/dts/qcom/sa8540p-ride.dts | 83 +++++++++++++++++++++++
 1 file changed, 83 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
index d19af74f5057..e4badf6f7a52 100644
--- a/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
+++ b/arch/arm64/boot/dts/qcom/sa8540p-ride.dts
@@ -17,6 +17,11 @@ / {
 	compatible = "qcom,sa8540p-ride", "qcom,sa8540p";
 
 	aliases {
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c12 = &i2c12;
+		i2c15 = &i2c15;
+		i2c18 = &i2c18;
 		serial0 = &uart17;
 	};
 
@@ -146,6 +151,41 @@ vreg_l8g: ldo8 {
 	};
 };
 
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_default>;
+
+	status = "okay";
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_default>;
+
+	status = "okay";
+};
+
+&i2c12 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c12_default>;
+
+	status = "okay";
+};
+
+&i2c15 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c15_default>;
+
+	status = "okay";
+};
+
+&i2c18 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c18_default>;
+
+	status = "okay";
+};
+
 &pcie2a {
 	ranges = <0x01000000 0x0 0x3c200000 0x0 0x3c200000 0x0 0x100000>,
 		 <0x02000000 0x0 0x3c300000 0x0 0x3c300000 0x0 0x1d00000>,
@@ -188,6 +228,14 @@ &pcie3a_phy {
 	status = "okay";
 };
 
+&qup0 {
+	status = "okay";
+};
+
+&qup1 {
+	status = "okay";
+};
+
 &qup2 {
 	status = "okay";
 };
@@ -268,6 +316,41 @@ &xo_board_clk {
 /* PINCTRL */
 
 &tlmm {
+	i2c0_default: i2c0-default-state {
+		pins = "gpio135", "gpio136";
+		function = "qup15";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
+	i2c1_default: i2c1-default-state {
+		pins = "gpio158", "gpio159";
+		function = "qup15";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
+	i2c12_default: i2c12-default-state {
+		pins = "gpio0", "gpio1";
+		function = "qup15";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
+	i2c15_default: i2c15-default-state {
+		pins = "gpio36", "gpio37";
+		function = "qup15";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
+	i2c18_default: i2c18-default-state {
+		pins = "gpio66", "gpio67";
+		function = "qup18";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
 	pcie2a_default: pcie2a-default-state {
 		perst-pins {
 			pins = "gpio143";
-- 
2.39.0