@@ -159,6 +159,19 @@ data {
};
};
+ 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 @@ irq {
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 @@ led@133 {
};
};
+ gsbi@16200000 {
+ status = "okay";
+ qcom,mode = <GSBI_PROT_I2C>;
+
+ gsbi3_i2c: i2c@16280000 {
+ status = "okay";
+ pinctrl-names = "default";
+ pinctrl-0 = <&dragon_gsbi3_i2c_pins>;
+
+ 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 @@ l1 {
bias-pull-down;
};
l2 {
- regulator-min-microvolt = <2850000>;
+ /* TMA340 requires strictly 3.3V */
+ regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
bias-pull-down;
};
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: Linus Walleij <linus.walleij@linaro.org> --- .../arm/boot/dts/qcom-apq8060-dragonboard.dts | 71 ++++++++++++++++++- 1 file changed, 70 insertions(+), 1 deletion(-)