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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: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20220913132846.305716-3-linus.walleij@linaro.org
This commit is contained in:
Linus Walleij 2022-09-13 15:28:46 +02:00 committed by Bjorn Andersson
parent 77012a11c3
commit 2aac117971
1 changed files with 70 additions and 1 deletions
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71
arch/arm/boot/dts/qcom-apq8060-dragonboard.dts
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@ -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;
};