Commit e3bc6fec authored by Rajesh Patil's avatar Rajesh Patil Committed by Bjorn Andersson
Browse files

arm64: dts: qcom: sc7280: Configure uart7 to support bluetooth on sc7280-idp 



Add bluetooth uart pin configuration for sc7280-idp.

Signed-off-by: default avatarRajesh Patil <rajpat@codeaurora.org>
Reviewed-by: default avatarMatthias Kaehlcke <mka@chromium.org>
Reviewed-by: default avatarStephen Boyd <swboyd@chromium.org>
Signed-off-by: default avatarBjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/1632399378-12229-7-git-send-email-rajpat@codeaurora.org
parent 38cd93f4

arch/arm64/boot/dts/qcom/sc7280-idp.dtsi

+85 −0
Original line number Diff line number Diff line
@@ -322,6 +322,16 @@ &usb_2_hsphy { 
	vdda18-supply = <&vreg_l1c_1p8>;

};



&uart7 {

	status = "okay";



	/delete-property/interrupts;

	interrupts-extended = <&intc GIC_SPI 608 IRQ_TYPE_LEVEL_HIGH>,

				<&tlmm 31 IRQ_TYPE_EDGE_FALLING>;

	pinctrl-names = "default", "sleep";

	pinctrl-1 = <&qup_uart7_sleep_cts>, <&qup_uart7_sleep_rts>, <&qup_uart7_sleep_tx>, <&qup_uart7_sleep_rx>;

};



/* PINCTRL - additions to nodes defined in sc7280.dtsi */



&pm7325_gpios {
@@ -358,6 +368,81 @@ &qup_uart5_rx { 
	bias-pull-up;

};



&qup_uart7_cts {

	/*

	 * Configure a pull-down on CTS to match the pull of

	 * the Bluetooth module.

	 */

	bias-pull-down;

};



&qup_uart7_rts {

	/* We'll drive RTS, so no pull */

	drive-strength = <2>;

	bias-disable;

};



&qup_uart7_tx {

	/* We'll drive TX, so no pull */

	drive-strength = <2>;

	bias-disable;

};



&qup_uart7_rx {

	/*

	 * Configure a pull-up on RX. This is needed to avoid

	 * garbage data when the TX pin of the Bluetooth module is

	 * in tri-state (module powered off or not driving the

	 * signal yet).

	 */

	bias-pull-up;

};



&tlmm {

	qup_uart7_sleep_cts: qup-uart7-sleep-cts {

		pins = "gpio28";

		function = "gpio";

		/*

		 * Configure a pull-down on CTS to match the pull of

		 * the Bluetooth module.

		 */

		bias-pull-down;

	};



	qup_uart7_sleep_rts: qup-uart7-sleep-rts {

		pins = "gpio29";

		function = "gpio";

		/*

		 * Configure pull-down on RTS. As RTS is active low

		 * signal, pull it low to indicate the BT SoC that it

		 * can wakeup the system anytime from suspend state by

		 * pulling RX low (by sending wakeup bytes).

		 */

		bias-pull-down;

	};



	qup_uart7_sleep_tx: qup-uart7-sleep-tx {

		pins = "gpio30";

		function = "gpio";

		/*

		 * Configure pull-up on TX when it isn't actively driven

		 * to prevent BT SoC from receiving garbage during sleep.

		 */

		bias-pull-up;

	};



	qup_uart7_sleep_rx: qup-uart7-sleep-rx {

		pins = "gpio31";

		function = "gpio";

		/*

		 * Configure a pull-up on RX. This is needed to avoid

		 * garbage data when the TX pin of the Bluetooth module

		 * is floating which may cause spurious wakeups.

		 */

		bias-pull-up;

	};

};



&sdc1_on {

	clk {

		bias-disable;