diff options
| author | Linus Walleij <linus.walleij@linaro.org> | 2022-09-13 15:28:46 +0200 |
|---|---|---|
| committer | Bjorn Andersson <andersson@kernel.org> | 2022-09-13 10:15:44 -0500 |
| commit | 2aac1179717d2bf7ed2747a823c104c918d37a80 (patch) | |
| tree | dddd8dd1186b9f58f4715224b33a91b5492dae4e /arch/arm/boot/dts/qcom-apq8060-dragonboard.dts | |
| parent | 77012a11c36e4609f2c0e0ff0bf215a8448d9033 (diff) | |
| download | linux-next-2aac1179717d2bf7ed2747a823c104c918d37a80.tar.gz | |
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
Diffstat (limited to 'arch/arm/boot/dts/qcom-apq8060-dragonboard.dts')
| -rw-r--r-- | arch/arm/boot/dts/qcom-apq8060-dragonboard.dts | 71 |
1 files changed, 70 insertions, 1 deletions
diff --git a/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts b/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts index 70a1dd629c7a..573e4dc66bb0 100644 --- a/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts +++ b/arch/arm/boot/dts/qcom-apq8060-dragonboard.dts @@ -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; }; |