Commit 2aac1179 authored by Linus Walleij's avatar Linus Walleij Committed by Bjorn Andersson
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ARM: dts: qcom: apq8060-dragonboard: Add TMA340 to APQ8060 DragonBoard 



This adds the CY8CTMA340 Touchscreen to the APQ8060 DragonBoard.

Tested without display by issuing cat /dev/input/input/event3
which produces appropriate noise and interrupts on the dedicated
GPIO line.

Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Signed-off-by: default avatarBjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220913132846.305716-3-linus.walleij@linaro.org
parent 77012a11

arch/arm/boot/dts/qcom-apq8060-dragonboard.dts

+70 −1
Original line number Diff line number Diff line
@@ -159,6 +159,19 @@ 
				};

			};



			dragon_gsbi3_i2c_pins: gsbi3_i2c {

				mux {

					pins = "gpio43", "gpio44";

					function = "gsbi3";

				};

				pinconf {

					pins = "gpio43", "gpio44";

					drive-strength = <8>;

					/* These have external pull-up 2.2kOhm to 1.8V */

					bias-disable;

				};

			};



			dragon_gsbi8_i2c_pins: gsbi8_i2c {

				mux {

					pins = "gpio64", "gpio65";
@@ -240,6 +253,22 @@ 
					bias-pull-up;

				};

			};



			dragon_tma340_gpios: tma340 {

				reset {

					/* RESET line, TS_ATTN, WAKE_CTP */

					pins = "gpio58";

					function = "gpio";

					drive-strength = <6>;

					bias-disable;

				};

				irq {

					pins = "gpio61"; /* IRQ line */

					function = "gpio";

					drive-strength = <2>;

					bias-pull-up;

				};

			};

		};



		qcom,ssbi@500000 {
@@ -444,6 +473,45 @@ 
			};

		};



		gsbi@16200000 {

			qcom,mode = <GSBI_PROT_I2C>;

			status = "okay";



			gsbi3_i2c: i2c@16280000 {

				pinctrl-names = "default";

				pinctrl-0 = <&dragon_gsbi3_i2c_pins>;

				status = "okay";



				touchscreen@24 {

					compatible = "cypress,cy8ctma340";

					reg = <0x24>;

					/* Certainly we can do at least 400 kHz */

					clock-frequency = <400000>;

					/* IRQ on GPIO61 called /CTP_INT */

					interrupt-parent = <&tlmm>;

					interrupts = <61 IRQ_TYPE_EDGE_FALLING>;

					/*

					 * The I2C bus is using a PCA9306 level translator from L16A

					 * to L2B so these two voltages are needed and L16A is

					 * kind of the IO voltage, however L16Aisn't really fed to

					 * the TMA340, which relies entirely on L2B (PM8901 L2).

					 */

					vcpin-supply = <&pm8058_l16>;

					vdd-supply = <&pm8901_l2>;

					/* GPIO58, called WAKE_CTP */

					reset-gpios = <&tlmm 58 GPIO_ACTIVE_LOW>;

					touchscreen-size-x = <480>;

					touchscreen-size-y = <800>;

					active-interval-ms = <0>;

					touch-timeout-ms = <255>;

					lowpower-interval-ms = <10>;

					bootloader-key = /bits/ 8 <0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07>;

					pinctrl-names = "default";

					pinctrl-0 = <&dragon_tma340_gpios>;

				};

			};

		};



		gsbi@19800000 {

			status = "okay";

			qcom,mode = <GSBI_PROT_I2C>;
@@ -634,7 +702,8 @@ 
					bias-pull-down;

				};

				l2 {

					regulator-min-microvolt = <2850000>;

					/* TMA340 requires strictly 3.3V */

					regulator-min-microvolt = <3300000>;

					regulator-max-microvolt = <3300000>;

					bias-pull-down;

				};