The OnePlus 6/6T both have a NQ330 (PN553 + P73N2M0).
The PN533 supported by the nxp-nci-i2c driver in mainline.
It detects/reads NFC tags using "nfctool".

Signed-off-by: Gergo Koteles <soyer@irl.hu>
---
 .../boot/dts/qcom/sdm845-oneplus-common.dtsi  | 33 +++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
index 64638ea94db7..4dfc9ade7596 100644
--- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
+++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
@@ -380,6 +380,25 @@ zap-shader {
 	};
 };
 
+&i2c3 {
+	status = "okay";
+	clock-frequency = <400000>;
+
+	nfc@28 {
+		compatible = "nxp,nxp-nci-i2c";
+		reg = <0x28>;
+
+		interrupt-parent = <&tlmm>;
+		interrupts = <63 IRQ_TYPE_EDGE_RISING>;
+
+		enable-gpios = <&tlmm 12 GPIO_ACTIVE_HIGH>;
+		firmware-gpios = <&tlmm 62 GPIO_ACTIVE_HIGH>;
+
+		pinctrl-names = "default";
+		pinctrl-0 = <&nfc_int_active &nfc_enable_active>;
+	};
+};
+
 &i2c10 {
 	status = "okay";
 	clock-frequency = <100000>;
@@ -753,6 +772,20 @@ &usb_1_hsphy {
 &tlmm {
 	gpio-reserved-ranges = <0 4>, <81 4>;
 
+	nfc_int_active: nfc-int-active-state {
+		pins = "gpio63";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
+	nfc_enable_active: nfc-enable-active-state {
+		pins = "gpio12", "gpio62";
+		function = "gpio";
+		drive-strength = <2>;
+		bias-pull-up;
+	};
+
 	tri_state_key_default: tri-state-key-default-state {
 		pins = "gpio40", "gpio42", "gpio26";
 		function = "gpio";
-- 
2.39.2

On 7.03.2023 19:32, Gergo Koteles wrote:
> The OnePlus 6/6T both have a NQ330 (PN553 + P73N2M0).
> The PN533 supported by the nxp-nci-i2c driver in mainline.
> It detects/reads NFC tags using "nfctool".
> 
> Signed-off-by: Gergo Koteles <soyer@irl.hu>
> ---
>  .../boot/dts/qcom/sdm845-oneplus-common.dtsi  | 33 +++++++++++++++++++
>  1 file changed, 33 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
> index 64638ea94db7..4dfc9ade7596 100644
> --- a/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sdm845-oneplus-common.dtsi
> @@ -380,6 +380,25 @@ zap-shader {
>  	};
>  };
>  
> +&i2c3 {
> +	status = "okay";
> +	clock-frequency = <400000>;
status last

> +
> +	nfc@28 {
> +		compatible = "nxp,nxp-nci-i2c";
> +		reg = <0x28>;
> +
> +		interrupt-parent = <&tlmm>;
> +		interrupts = <63 IRQ_TYPE_EDGE_RISING>;
interrupts-extended = <&tlmm 63 IRQ_TYPE_EDGE_RISING>;
> +
> +		enable-gpios = <&tlmm 12 GPIO_ACTIVE_HIGH>;
> +		firmware-gpios = <&tlmm 62 GPIO_ACTIVE_HIGH>;
> +
> +		pinctrl-names = "default";
> +		pinctrl-0 = <&nfc_int_active &nfc_enable_active>;
property-n
property-names

> +	};
> +};
> +
>  &i2c10 {
>  	status = "okay";
>  	clock-frequency = <100000>;
> @@ -753,6 +772,20 @@ &usb_1_hsphy {
>  &tlmm {
>  	gpio-reserved-ranges = <0 4>, <81 4>;
>  
> +	nfc_int_active: nfc-int-active-state {
> +		pins = "gpio63";
> +		function = "gpio";
> +		drive-strength = <2>;
> +		bias-pull-up;
> +	};
> +
> +	nfc_enable_active: nfc-enable-active-state {
While it works as-is, I think adding a separate gpio node
for the firmware pin would make more sense logically.

Konrad
> +		pins = "gpio12", "gpio62";
> +		function = "gpio";
> +		drive-strength = <2>;
> +		bias-pull-up;
> +	};
> +
>  	tri_state_key_default: tri-state-key-default-state {
>  		pins = "gpio40", "gpio42", "gpio26";
>  		function = "gpio";