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From:   Brian Masney <bmasney@redhat.com>
To:     andersson@kernel.org, krzysztof.kozlowski+dt@linaro.org
Cc:     quic_shazhuss@quicinc.com, konrad.dybcio@linaro.org,
        robh+dt@kernel.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.com
Subject: [PATCH v3 6/7] arm64: dts: qcom: sa8540p-ride: add i2c nodes
Date:   Tue, 20 Dec 2022 14:28:53 -0500
Message-Id: <20221220192854.521647-7-bmasney@redhat.com>
In-Reply-To: <20221220192854.521647-1-bmasney@redhat.com>
References: <20221220192854.521647-1-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>
---
Changes from v2 to v3
- Added Konrad's R-b and Shazad's T-b

Changes from v1 to v2
- Dropped qupX_ prefix from labels. (Johan)
- Reordered nodes based on new name.
- Added i2c buses 0, 1, and 12 (Shazad)
- Drop mux/config-pins and have the pin properties live directly
  under the i2cX-default-state node. (Konrad)
- Use decimal notation for drive strength (Johan)

 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 b6e0db5508c7..ccd2ea3c9d04 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";
-- 
2.38.1