forked from Minki/linux
13c23cd18b
The current/old gpio framework used doesn't properly listen to ACTIVE_LOW and ACTIVE_HIGH flags. The newer gpio framework takes into account these flags when setting gpio values. Since the values being output were based on voltage and not logic they change to reflect this difference. Also use gpiod_set_value_cansleep since wake and reset pins can be provided by bus based io expanders. Switch from msleep(5) to udelay_range(5000,6000) to avoid check patch warning. Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com> Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
56 lines
1.8 KiB
Plaintext
56 lines
1.8 KiB
Plaintext
FocalTech EDT-FT5x06 Polytouch driver
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=====================================
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There are 3 variants of the chip for various touch panel sizes
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FT5206GE1 2.8" .. 3.8"
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FT5306DE4 4.3" .. 7"
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FT5406EE8 7" .. 8.9"
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The software interface is identical for all those chips, so that
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currently there is no need for the driver to distinguish between the
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different chips. Nevertheless distinct compatible strings are used so
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that a distinction can be added if necessary without changing the DT
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bindings.
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Required properties:
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- compatible: "edt,edt-ft5206"
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or: "edt,edt-ft5306"
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or: "edt,edt-ft5406"
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- reg: I2C slave address of the chip (0x38)
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- interrupt-parent: a phandle pointing to the interrupt controller
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serving the interrupt for this chip
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- interrupts: interrupt specification for the touchdetect
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interrupt
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Optional properties:
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- reset-gpios: GPIO specification for the RESET input
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- wake-gpios: GPIO specification for the WAKE input
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- pinctrl-names: should be "default"
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- pinctrl-0: a phandle pointing to the pin settings for the
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control gpios
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- threshold: allows setting the "click"-threshold in the range
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from 20 to 80.
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- gain: allows setting the sensitivity in the range from 0 to
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31. Note that lower values indicate higher
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sensitivity.
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- offset: allows setting the edge compensation in the range from
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0 to 31.
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Example:
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polytouch: edt-ft5x06@38 {
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compatible = "edt,edt-ft5406", "edt,edt-ft5x06";
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reg = <0x38>;
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pinctrl-names = "default";
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pinctrl-0 = <&edt_ft5x06_pins>;
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interrupt-parent = <&gpio2>;
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interrupts = <5 0>;
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reset-gpios = <&gpio2 6 GPIO_ACTIVE_LOW>;
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wake-gpios = <&gpio4 9 GPIO_ACTIVE_HIGH>;
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};
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