forked from Minki/linux
Merge branch 'next' into for-linus
Prepare second round of input updates for 4.3 merge window.
This commit is contained in:
Dmitry Torokhov
commit
53431d0a35
@ -0,0 +1,36 @@
|
||||
* Toradex Colibri VF50 Touchscreen driver
|
||||
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||||
Required Properties:
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||||
- compatible must be toradex,vf50-touchscreen
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- io-channels: adc channels being used by the Colibri VF50 module
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- xp-gpios: FET gate driver for input of X+
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- xm-gpios: FET gate driver for input of X-
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- yp-gpios: FET gate driver for input of Y+
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- ym-gpios: FET gate driver for input of Y-
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- interrupt-parent: phandle for the interrupt controller
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- interrupts: pen irq interrupt for touch detection
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- pinctrl-names: "idle", "default", "gpios"
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- pinctrl-0: pinctrl node for pen/touch detection state pinmux
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- pinctrl-1: pinctrl node for X/Y and pressure measurement (ADC) state pinmux
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- pinctrl-2: pinctrl node for gpios functioning as FET gate drivers
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- vf50-ts-min-pressure: pressure level at which to stop measuring X/Y values
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Example:
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touchctrl: vf50_touchctrl {
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compatible = "toradex,vf50-touchscreen";
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io-channels = <&adc1 0>,<&adc0 0>,
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<&adc0 1>,<&adc1 2>;
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xp-gpios = <&gpio0 13 GPIO_ACTIVE_LOW>;
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xm-gpios = <&gpio2 29 GPIO_ACTIVE_HIGH>;
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yp-gpios = <&gpio0 12 GPIO_ACTIVE_LOW>;
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ym-gpios = <&gpio0 4 GPIO_ACTIVE_HIGH>;
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interrupt-parent = <&gpio0>;
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interrupts = <8 IRQ_TYPE_LEVEL_LOW>;
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pinctrl-names = "idle","default","gpios";
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pinctrl-0 = <&pinctrl_touchctrl_idle>;
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pinctrl-1 = <&pinctrl_touchctrl_default>;
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pinctrl-2 = <&pinctrl_touchctrl_gpios>;
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vf50-ts-min-pressure = <200>;
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status = "disabled";
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};
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@ -0,0 +1,36 @@
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* Freescale i.MX6UL Touch Controller
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Required properties:
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- compatible: must be "fsl,imx6ul-tsc".
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- reg: this touch controller address and the ADC2 address.
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- interrupts: the interrupt of this touch controller and ADC2.
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- clocks: the root clock of touch controller and ADC2.
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- clock-names; must be "tsc" and "adc".
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- xnur-gpio: the X- gpio this controller connect to.
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This xnur-gpio returns to low once the finger leave the touch screen (The
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last touch event the touch controller capture).
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Optional properties:
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- measure-delay-time: the value of measure delay time.
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Before X-axis or Y-axis measurement, the screen need some time before
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even potential distribution ready.
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This value depends on the touch screen.
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- pre-charge-time: the touch screen need some time to precharge.
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This value depends on the touch screen.
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Example:
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tsc: tsc@02040000 {
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compatible = "fsl,imx6ul-tsc";
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reg = <0x02040000 0x4000>, <0x0219c000 0x4000>;
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interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>,
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<GIC_SPI 101 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&clks IMX6UL_CLK_IPG>,
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<&clks IMX6UL_CLK_ADC2>;
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clock-names = "tsc", "adc";
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_tsc>;
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xnur-gpio = <&gpio1 3 GPIO_ACTIVE_LOW>;
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measure-delay-time = <0xfff>;
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pre-charge-time = <0xffff>;
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status = "okay";
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};
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@ -290,19 +290,14 @@ static int evdev_flush(struct file *file, fl_owner_t id)
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{
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struct evdev_client *client = file->private_data;
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struct evdev *evdev = client->evdev;
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int retval;
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retval = mutex_lock_interruptible(&evdev->mutex);
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if (retval)
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return retval;
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mutex_lock(&evdev->mutex);
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if (!evdev->exist || client->revoked)
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retval = -ENODEV;
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else
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retval = input_flush_device(&evdev->handle, file);
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if (evdev->exist && !client->revoked)
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input_flush_device(&evdev->handle, file);
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mutex_unlock(&evdev->mutex);
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return retval;
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return 0;
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}
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static void evdev_free(struct device *dev)
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@ -5,8 +5,6 @@
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* This program is free software; you can redistribute it and/or modify
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||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
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*
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* <<Power management needs to be implemented>>.
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*/
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#include <linux/clk.h>
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@ -118,6 +118,7 @@ static const struct of_device_id ab8500_ponkey_match[] = {
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{ .compatible = "stericsson,ab8500-ponkey", },
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{}
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};
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MODULE_DEVICE_TABLE(of, ab8500_ponkey_match);
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#endif
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static struct platform_driver ab8500_ponkey_driver = {
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@ -173,6 +173,7 @@ static const struct of_device_id pwm_beeper_match[] = {
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{ .compatible = "pwm-beeper", },
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{ },
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};
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MODULE_DEVICE_TABLE(of, pwm_beeper_match);
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#endif
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|
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static struct platform_driver pwm_beeper_driver = {
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||||
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@ -249,6 +249,7 @@ static const struct of_device_id regulator_haptic_dt_match[] = {
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{ .compatible = "regulator-haptic" },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, regulator_haptic_dt_match);
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static struct platform_driver regulator_haptic_driver = {
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.probe = regulator_haptic_probe,
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@ -253,6 +253,7 @@ static const struct of_device_id bbc_beep_match[] = {
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, bbc_beep_match);
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static struct platform_driver bbc_beep_driver = {
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.driver = {
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@ -332,6 +333,7 @@ static const struct of_device_id grover_beep_match[] = {
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},
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{},
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};
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MODULE_DEVICE_TABLE(of, grover_beep_match);
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|
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static struct platform_driver grover_beep_driver = {
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.driver = {
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@ -1170,6 +1170,7 @@ static const struct acpi_device_id elan_acpi_id[] = {
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{ "ELAN0000", 0 },
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{ "ELAN0100", 0 },
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{ "ELAN0600", 0 },
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{ "ELAN1000", 0 },
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{ }
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||||
};
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MODULE_DEVICE_TABLE(acpi, elan_acpi_id);
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@ -877,7 +877,7 @@ static int __init i8042_check_aux(void)
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static int i8042_controller_check(void)
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{
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if (i8042_flush()) {
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pr_err("No controller found\n");
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pr_info("No controller found\n");
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return -ENODEV;
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}
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@ -479,6 +479,18 @@ config TOUCHSCREEN_MTOUCH
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To compile this driver as a module, choose M here: the
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module will be called mtouch.
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config TOUCHSCREEN_IMX6UL_TSC
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tristate "Freescale i.MX6UL touchscreen controller"
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depends on (OF && GPIOLIB) || COMPILE_TEST
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help
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Say Y here if you have a Freescale i.MX6UL, and want to
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use the internal touchscreen controller.
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If unsure, say N.
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To compile this driver as a module, choose M here: the
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module will be called imx6ul_tsc.
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config TOUCHSCREEN_INEXIO
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tristate "iNexio serial touchscreens"
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select SERIO
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@ -1040,4 +1052,16 @@ config TOUCHSCREEN_ZFORCE
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To compile this driver as a module, choose M here: the
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module will be called zforce_ts.
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|
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config TOUCHSCREEN_COLIBRI_VF50
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tristate "Toradex Colibri on board touchscreen driver"
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depends on GPIOLIB && IIO && VF610_ADC
|
||||
help
|
||||
Say Y here if you have a Colibri VF50 and plan to use
|
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the on-board provided 4-wire touchscreen driver.
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If unsure, say N.
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||||
To compile this driver as a module, choose M here: the
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module will be called colibri_vf50_ts.
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endif
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@ -38,6 +38,7 @@ obj-$(CONFIG_TOUCHSCREEN_EGALAX) += egalax_ts.o
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obj-$(CONFIG_TOUCHSCREEN_FUJITSU) += fujitsu_ts.o
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obj-$(CONFIG_TOUCHSCREEN_GOODIX) += goodix.o
|
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obj-$(CONFIG_TOUCHSCREEN_ILI210X) += ili210x.o
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obj-$(CONFIG_TOUCHSCREEN_IMX6UL_TSC) += imx6ul_tsc.o
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obj-$(CONFIG_TOUCHSCREEN_INEXIO) += inexio.o
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obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) += intel-mid-touch.o
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obj-$(CONFIG_TOUCHSCREEN_IPROC) += bcm_iproc_tsc.o
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@ -85,3 +86,4 @@ obj-$(CONFIG_TOUCHSCREEN_W90X900) += w90p910_ts.o
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obj-$(CONFIG_TOUCHSCREEN_SX8654) += sx8654.o
|
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obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o
|
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obj-$(CONFIG_TOUCHSCREEN_ZFORCE) += zforce_ts.o
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obj-$(CONFIG_TOUCHSCREEN_COLIBRI_VF50) += colibri-vf50-ts.o
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386
drivers/input/touchscreen/colibri-vf50-ts.c
Normal file
386
drivers/input/touchscreen/colibri-vf50-ts.c
Normal file
@ -0,0 +1,386 @@
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/*
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* Toradex Colibri VF50 Touchscreen driver
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*
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* Copyright 2015 Toradex AG
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*
|
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* Originally authored by Stefan Agner for 3.0 kernel
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License as published by
|
||||
* the Free Software Foundation; either version 2 of the License, or
|
||||
* (at your option) any later version.
|
||||
*/
|
||||
|
||||
#include <linux/delay.h>
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#include <linux/err.h>
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#include <linux/gpio.h>
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#include <linux/gpio/consumer.h>
|
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#include <linux/iio/consumer.h>
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#include <linux/iio/types.h>
|
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#include <linux/input.h>
|
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#include <linux/interrupt.h>
|
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#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/pinctrl/consumer.h>
|
||||
#include <linux/platform_device.h>
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||||
#include <linux/slab.h>
|
||||
#include <linux/types.h>
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||||
|
||||
#define DRIVER_NAME "colibri-vf50-ts"
|
||||
#define DRV_VERSION "1.0"
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||||
|
||||
#define VF_ADC_MAX ((1 << 12) - 1)
|
||||
|
||||
#define COLI_TOUCH_MIN_DELAY_US 1000
|
||||
#define COLI_TOUCH_MAX_DELAY_US 2000
|
||||
#define COLI_PULLUP_MIN_DELAY_US 10000
|
||||
#define COLI_PULLUP_MAX_DELAY_US 11000
|
||||
#define COLI_TOUCH_NO_OF_AVGS 5
|
||||
#define COLI_TOUCH_REQ_ADC_CHAN 4
|
||||
|
||||
struct vf50_touch_device {
|
||||
struct platform_device *pdev;
|
||||
struct input_dev *ts_input;
|
||||
struct iio_channel *channels;
|
||||
struct gpio_desc *gpio_xp;
|
||||
struct gpio_desc *gpio_xm;
|
||||
struct gpio_desc *gpio_yp;
|
||||
struct gpio_desc *gpio_ym;
|
||||
int pen_irq;
|
||||
int min_pressure;
|
||||
bool stop_touchscreen;
|
||||
};
|
||||
|
||||
/*
|
||||
* Enables given plates and measures touch parameters using ADC
|
||||
*/
|
||||
static int adc_ts_measure(struct iio_channel *channel,
|
||||
struct gpio_desc *plate_p, struct gpio_desc *plate_m)
|
||||
{
|
||||
int i, value = 0, val = 0;
|
||||
int error;
|
||||
|
||||
gpiod_set_value(plate_p, 1);
|
||||
gpiod_set_value(plate_m, 1);
|
||||
|
||||
usleep_range(COLI_TOUCH_MIN_DELAY_US, COLI_TOUCH_MAX_DELAY_US);
|
||||
|
||||
for (i = 0; i < COLI_TOUCH_NO_OF_AVGS; i++) {
|
||||
error = iio_read_channel_raw(channel, &val);
|
||||
if (error < 0) {
|
||||
value = error;
|
||||
goto error_iio_read;
|
||||
}
|
||||
|
||||
value += val;
|
||||
}
|
||||
|
||||
value /= COLI_TOUCH_NO_OF_AVGS;
|
||||
|
||||
error_iio_read:
|
||||
gpiod_set_value(plate_p, 0);
|
||||
gpiod_set_value(plate_m, 0);
|
||||
|
||||
return value;
|
||||
}
|
||||
|
||||
/*
|
||||
* Enable touch detection using falling edge detection on XM
|
||||
*/
|
||||
static void vf50_ts_enable_touch_detection(struct vf50_touch_device *vf50_ts)
|
||||
{
|
||||
/* Enable plate YM (needs to be strong GND, high active) */
|
||||
gpiod_set_value(vf50_ts->gpio_ym, 1);
|
||||
|
||||
/*
|
||||
* Let the platform mux to idle state in order to enable
|
||||
* Pull-Up on GPIO
|
||||
*/
|
||||
pinctrl_pm_select_idle_state(&vf50_ts->pdev->dev);
|
||||
|
||||
/* Wait for the pull-up to be stable on high */
|
||||
usleep_range(COLI_PULLUP_MIN_DELAY_US, COLI_PULLUP_MAX_DELAY_US);
|
||||
}
|
||||
|
||||
/*
|
||||
* ADC touch screen sampling bottom half irq handler
|
||||
*/
|
||||
static irqreturn_t vf50_ts_irq_bh(int irq, void *private)
|
||||
{
|
||||
struct vf50_touch_device *vf50_ts = private;
|
||||
struct device *dev = &vf50_ts->pdev->dev;
|
||||
int val_x, val_y, val_z1, val_z2, val_p = 0;
|
||||
bool discard_val_on_start = true;
|
||||
|
||||
/* Disable the touch detection plates */
|
||||
gpiod_set_value(vf50_ts->gpio_ym, 0);
|
||||
|
||||
/* Let the platform mux to default state in order to mux as ADC */
|
||||
pinctrl_pm_select_default_state(dev);
|
||||
|
||||
while (!vf50_ts->stop_touchscreen) {
|
||||
/* X-Direction */
|
||||
val_x = adc_ts_measure(&vf50_ts->channels[0],
|
||||
vf50_ts->gpio_xp, vf50_ts->gpio_xm);
|
||||
if (val_x < 0)
|
||||
break;
|
||||
|
||||
/* Y-Direction */
|
||||
val_y = adc_ts_measure(&vf50_ts->channels[1],
|
||||
vf50_ts->gpio_yp, vf50_ts->gpio_ym);
|
||||
if (val_y < 0)
|
||||
break;
|
||||
|
||||
/*
|
||||
* Touch pressure
|
||||
* Measure on XP/YM
|
||||
*/
|
||||
val_z1 = adc_ts_measure(&vf50_ts->channels[2],
|
||||
vf50_ts->gpio_yp, vf50_ts->gpio_xm);
|
||||
if (val_z1 < 0)
|
||||
break;
|
||||
val_z2 = adc_ts_measure(&vf50_ts->channels[3],
|
||||
vf50_ts->gpio_yp, vf50_ts->gpio_xm);
|
||||
if (val_z2 < 0)
|
||||
break;
|
||||
|
||||
/* Validate signal (avoid calculation using noise) */
|
||||
if (val_z1 > 64 && val_x > 64) {
|
||||
/*
|
||||
* Calculate resistance between the plates
|
||||
* lower resistance means higher pressure
|
||||
*/
|
||||
int r_x = (1000 * val_x) / VF_ADC_MAX;
|
||||
|
||||
val_p = (r_x * val_z2) / val_z1 - r_x;
|
||||
|
||||
} else {
|
||||
val_p = 2000;
|
||||
}
|
||||
|
||||
val_p = 2000 - val_p;
|
||||
dev_dbg(dev,
|
||||
"Measured values: x: %d, y: %d, z1: %d, z2: %d, p: %d\n",
|
||||
val_x, val_y, val_z1, val_z2, val_p);
|
||||
|
||||
/*
|
||||
* If touch pressure is too low, stop measuring and reenable
|
||||
* touch detection
|
||||
*/
|
||||
if (val_p < vf50_ts->min_pressure || val_p > 2000)
|
||||
break;
|
||||
|
||||
/*
|
||||
* The pressure may not be enough for the first x and the
|
||||
* second y measurement, but, the pressure is ok when the
|
||||
* driver is doing the third and fourth measurement. To
|
||||
* take care of this, we drop the first measurement always.
|
||||
*/
|
||||
if (discard_val_on_start) {
|
||||
discard_val_on_start = false;
|
||||
} else {
|
||||
/*
|
||||
* Report touch position and sleep for
|
||||
* the next measurement.
|
||||
*/
|
||||
input_report_abs(vf50_ts->ts_input,
|
||||
ABS_X, VF_ADC_MAX - val_x);
|
||||
input_report_abs(vf50_ts->ts_input,
|
||||
ABS_Y, VF_ADC_MAX - val_y);
|
||||
input_report_abs(vf50_ts->ts_input,
|
||||
ABS_PRESSURE, val_p);
|
||||
input_report_key(vf50_ts->ts_input, BTN_TOUCH, 1);
|
||||
input_sync(vf50_ts->ts_input);
|
||||
}
|
||||
|
||||
usleep_range(COLI_PULLUP_MIN_DELAY_US,
|
||||
COLI_PULLUP_MAX_DELAY_US);
|
||||
}
|
||||
|
||||
/* Report no more touch, re-enable touch detection */
|
||||
input_report_abs(vf50_ts->ts_input, ABS_PRESSURE, 0);
|
||||
input_report_key(vf50_ts->ts_input, BTN_TOUCH, 0);
|
||||
input_sync(vf50_ts->ts_input);
|
||||
|
||||
vf50_ts_enable_touch_detection(vf50_ts);
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int vf50_ts_open(struct input_dev *dev_input)
|
||||
{
|
||||
struct vf50_touch_device *touchdev = input_get_drvdata(dev_input);
|
||||
struct device *dev = &touchdev->pdev->dev;
|
||||
|
||||
dev_dbg(dev, "Input device %s opened, starting touch detection\n",
|
||||
dev_input->name);
|
||||
|
||||
touchdev->stop_touchscreen = false;
|
||||
|
||||
/* Mux detection before request IRQ, wait for pull-up to settle */
|
||||
vf50_ts_enable_touch_detection(touchdev);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void vf50_ts_close(struct input_dev *dev_input)
|
||||
{
|
||||
struct vf50_touch_device *touchdev = input_get_drvdata(dev_input);
|
||||
struct device *dev = &touchdev->pdev->dev;
|
||||
|
||||
touchdev->stop_touchscreen = true;
|
||||
|
||||
/* Make sure IRQ is not running past close */
|
||||
mb();
|
||||
synchronize_irq(touchdev->pen_irq);
|
||||
|
||||
gpiod_set_value(touchdev->gpio_ym, 0);
|
||||
pinctrl_pm_select_default_state(dev);
|
||||
|
||||
dev_dbg(dev, "Input device %s closed, disable touch detection\n",
|
||||
dev_input->name);
|
||||
}
|
||||
|
||||
static int vf50_ts_get_gpiod(struct device *dev, struct gpio_desc **gpio_d,
|
||||
const char *con_id, enum gpiod_flags flags)
|
||||
{
|
||||
int error;
|
||||
|
||||
*gpio_d = devm_gpiod_get(dev, con_id, flags);
|
||||
if (IS_ERR(*gpio_d)) {
|
||||
error = PTR_ERR(*gpio_d);
|
||||
dev_err(dev, "Could not get gpio_%s %d\n", con_id, error);
|
||||
return error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void vf50_ts_channel_release(void *data)
|
||||
{
|
||||
struct iio_channel *channels = data;
|
||||
|
||||
iio_channel_release_all(channels);
|
||||
}
|
||||
|
||||
static int vf50_ts_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct input_dev *input;
|
||||
struct iio_channel *channels;
|
||||
struct device *dev = &pdev->dev;
|
||||
struct vf50_touch_device *touchdev;
|
||||
int num_adc_channels;
|
||||
int error;
|
||||
|
||||
channels = iio_channel_get_all(dev);
|
||||
if (IS_ERR(channels))
|
||||
return PTR_ERR(channels);
|
||||
|
||||
error = devm_add_action(dev, vf50_ts_channel_release, channels);
|
||||
if (error) {
|
||||
iio_channel_release_all(channels);
|
||||
dev_err(dev, "Failed to register iio channel release action");
|
||||
return error;
|
||||
}
|
||||
|
||||
num_adc_channels = 0;
|
||||
while (channels[num_adc_channels].indio_dev)
|
||||
num_adc_channels++;
|
||||
|
||||
if (num_adc_channels != COLI_TOUCH_REQ_ADC_CHAN) {
|
||||
dev_err(dev, "Inadequate ADC channels specified\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
touchdev = devm_kzalloc(dev, sizeof(*touchdev), GFP_KERNEL);
|
||||
if (!touchdev)
|
||||
return -ENOMEM;
|
||||
|
||||
touchdev->pdev = pdev;
|
||||
touchdev->channels = channels;
|
||||
|
||||
error = of_property_read_u32(dev->of_node, "vf50-ts-min-pressure",
|
||||
&touchdev->min_pressure);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
input = devm_input_allocate_device(dev);
|
||||
if (!input) {
|
||||
dev_err(dev, "Failed to allocate TS input device\n");
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, touchdev);
|
||||
|
||||
input->name = DRIVER_NAME;
|
||||
input->id.bustype = BUS_HOST;
|
||||
input->dev.parent = dev;
|
||||
input->open = vf50_ts_open;
|
||||
input->close = vf50_ts_close;
|
||||
|
||||
input_set_capability(input, EV_KEY, BTN_TOUCH);
|
||||
input_set_abs_params(input, ABS_X, 0, VF_ADC_MAX, 0, 0);
|
||||
input_set_abs_params(input, ABS_Y, 0, VF_ADC_MAX, 0, 0);
|
||||
input_set_abs_params(input, ABS_PRESSURE, 0, VF_ADC_MAX, 0, 0);
|
||||
|
||||
touchdev->ts_input = input;
|
||||
input_set_drvdata(input, touchdev);
|
||||
|
||||
error = input_register_device(input);
|
||||
if (error) {
|
||||
dev_err(dev, "Failed to register input device\n");
|
||||
return error;
|
||||
}
|
||||
|
||||
error = vf50_ts_get_gpiod(dev, &touchdev->gpio_xp, "xp", GPIOD_OUT_LOW);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = vf50_ts_get_gpiod(dev, &touchdev->gpio_xm,
|
||||
"xm", GPIOD_OUT_LOW);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = vf50_ts_get_gpiod(dev, &touchdev->gpio_yp, "yp", GPIOD_OUT_LOW);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
error = vf50_ts_get_gpiod(dev, &touchdev->gpio_ym, "ym", GPIOD_OUT_LOW);
|
||||
if (error)
|
||||
return error;
|
||||
|
||||
touchdev->pen_irq = platform_get_irq(pdev, 0);
|
||||
if (touchdev->pen_irq < 0)
|
||||
return touchdev->pen_irq;
|
||||
|
||||
error = devm_request_threaded_irq(dev, touchdev->pen_irq,
|
||||
NULL, vf50_ts_irq_bh, IRQF_ONESHOT,
|
||||
"vf50 touch", touchdev);
|
||||
if (error) {
|
||||
dev_err(dev, "Failed to request IRQ %d: %d\n",
|
||||
touchdev->pen_irq, error);
|
||||
return error;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct of_device_id vf50_touch_of_match[] = {
|
||||
{ .compatible = "toradex,vf50-touchscreen", },
|
||||
{ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, vf50_touch_of_match);
|
||||
|
||||
static struct platform_driver vf50_touch_driver = {
|
||||
.driver = {
|
||||
.name = "toradex,vf50_touchctrl",
|
||||
.of_match_table = vf50_touch_of_match,
|
||||
},
|
||||
.probe = vf50_ts_probe,
|
||||
};
|
||||
module_platform_driver(vf50_touch_driver);
|
||||
|
||||
MODULE_AUTHOR("Sanchayan Maity");
|
||||
MODULE_DESCRIPTION("Colibri VF50 Touchscreen driver");
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_VERSION(DRV_VERSION);
|
||||
@ -86,4 +86,3 @@ module_i2c_driver(cyttsp4_i2c_driver);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
|
||||
MODULE_AUTHOR("Cypress");
|
||||
MODULE_ALIAS("i2c:cyttsp4");
|
||||
|
||||
@ -86,4 +86,3 @@ module_i2c_driver(cyttsp_i2c_driver);
|
||||
MODULE_LICENSE("GPL");
|
||||
MODULE_DESCRIPTION("Cypress TrueTouch(R) Standard Product (TTSP) I2C driver");
|
||||
MODULE_AUTHOR("Cypress");
|
||||
MODULE_ALIAS("i2c:cyttsp");
|
||||
|
||||
@ -102,7 +102,7 @@
|
||||
#define ELAN_FW_PAGESIZE 132
|
||||
|
||||
/* calibration timeout definition */
|
||||
#define ELAN_CALI_TIMEOUT_MSEC 10000
|
||||
#define ELAN_CALI_TIMEOUT_MSEC 12000
|
||||
|
||||
#define ELAN_POWERON_DELAY_USEC 500
|
||||
#define ELAN_RESET_DELAY_MSEC 20
|
||||
|
||||
523
drivers/input/touchscreen/imx6ul_tsc.c
Normal file
523
drivers/input/touchscreen/imx6ul_tsc.c
Normal file
@ -0,0 +1,523 @@
|
||||
/*
|
||||
* Freescale i.MX6UL touchscreen controller driver
|
||||
*
|
||||
* Copyright (C) 2015 Freescale Semiconductor, Inc.
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#include <linux/errno.h>
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/module.h>
|
||||
#include <linux/gpio/consumer.h>
|
||||
#include <linux/input.h>
|
||||
#include <linux/slab.h>
|
||||
#include <linux/completion.h>
|
||||
#include <linux/delay.h>
|
||||
#include <linux/of.h>
|
||||
#include <linux/interrupt.h>
|
||||
#include <linux/platform_device.h>
|
||||
#include <linux/clk.h>
|
||||
#include <linux/io.h>
|
||||
|
||||
/* ADC configuration registers field define */
|
||||
#define ADC_AIEN (0x1 << 7)
|
||||
#define ADC_CONV_DISABLE 0x1F
|
||||
#define ADC_CAL (0x1 << 7)
|
||||
#define ADC_CALF 0x2
|
||||
#define ADC_12BIT_MODE (0x2 << 2)
|
||||
#define ADC_IPG_CLK 0x00
|
||||
#define ADC_CLK_DIV_8 (0x03 << 5)
|
||||
#define ADC_SHORT_SAMPLE_MODE (0x0 << 4)
|
||||
#define ADC_HARDWARE_TRIGGER (0x1 << 13)
|
||||
#define SELECT_CHANNEL_4 0x04
|
||||
#define SELECT_CHANNEL_1 0x01
|
||||
#define DISABLE_CONVERSION_INT (0x0 << 7)
|
||||
|
||||
/* ADC registers */
|
||||
#define REG_ADC_HC0 0x00
|
||||
#define REG_ADC_HC1 0x04
|
||||
#define REG_ADC_HC2 0x08
|
||||
#define REG_ADC_HC3 0x0C
|
||||
#define REG_ADC_HC4 0x10
|
||||
#define REG_ADC_HS 0x14
|
||||
#define REG_ADC_R0 0x18
|
||||
#define REG_ADC_CFG 0x2C
|
||||
#define REG_ADC_GC 0x30
|
||||
#define REG_ADC_GS 0x34
|
||||
|
||||
#define ADC_TIMEOUT msecs_to_jiffies(100)
|
||||
|
||||
/* TSC registers */
|
||||
#define REG_TSC_BASIC_SETING 0x00
|
||||
#define REG_TSC_PRE_CHARGE_TIME 0x10
|
||||
#define REG_TSC_FLOW_CONTROL 0x20
|
||||
#define REG_TSC_MEASURE_VALUE 0x30
|
||||
#define REG_TSC_INT_EN 0x40
|
||||
#define REG_TSC_INT_SIG_EN 0x50
|
||||
#define REG_TSC_INT_STATUS 0x60
|
||||
#define REG_TSC_DEBUG_MODE 0x70
|
||||
#define REG_TSC_DEBUG_MODE2 0x80
|
||||
|
||||
/* TSC configuration registers field define */
|
||||
#define DETECT_4_WIRE_MODE (0x0 << 4)
|
||||
#define AUTO_MEASURE 0x1
|
||||
#define MEASURE_SIGNAL 0x1
|
||||
#define DETECT_SIGNAL (0x1 << 4)
|
||||
#define VALID_SIGNAL (0x1 << 8)
|
||||
#define MEASURE_INT_EN 0x1
|
||||
#define MEASURE_SIG_EN 0x1
|
||||
#define VALID_SIG_EN (0x1 << 8)
|
||||
#define DE_GLITCH_2 (0x2 << 29)
|
||||
#define START_SENSE (0x1 << 12)
|
||||
#define TSC_DISABLE (0x1 << 16)
|
||||
#define DETECT_MODE 0x2
|
||||
|
||||
struct imx6ul_tsc {
|
||||
struct device *dev;
|
||||
struct input_dev *input;
|
||||
void __iomem *tsc_regs;
|
||||
void __iomem *adc_regs;
|
||||
struct clk *tsc_clk;
|
||||
struct clk *adc_clk;
|
||||
struct gpio_desc *xnur_gpio;
|
||||
|
||||
int measure_delay_time;
|
||||
int pre_charge_time;
|
||||
|
||||
struct completion completion;
|
||||
};
|
||||
|
||||
/*
|
||||
* TSC module need ADC to get the measure value. So
|
||||
* before config TSC, we should initialize ADC module.
|
||||
*/
|
||||
static void imx6ul_adc_init(struct imx6ul_tsc *tsc)
|
||||
{
|
||||
int adc_hc = 0;
|
||||
int adc_gc;
|
||||
int adc_gs;
|
||||
int adc_cfg;
|
||||
int timeout;
|
||||
|
||||
reinit_completion(&tsc->completion);
|
||||
|
||||
adc_cfg = readl(tsc->adc_regs + REG_ADC_CFG);
|
||||
adc_cfg |= ADC_12BIT_MODE | ADC_IPG_CLK;
|
||||
adc_cfg |= ADC_CLK_DIV_8 | ADC_SHORT_SAMPLE_MODE;
|
||||
adc_cfg &= ~ADC_HARDWARE_TRIGGER;
|
||||
writel(adc_cfg, tsc->adc_regs + REG_ADC_CFG);
|
||||
|
||||
/* enable calibration interrupt */
|
||||
adc_hc |= ADC_AIEN;
|
||||
adc_hc |= ADC_CONV_DISABLE;
|
||||
writel(adc_hc, tsc->adc_regs + REG_ADC_HC0);
|
||||
|
||||
/* start ADC calibration */
|
||||
adc_gc = readl(tsc->adc_regs + REG_ADC_GC);
|
||||
adc_gc |= ADC_CAL;
|
||||
writel(adc_gc, tsc->adc_regs + REG_ADC_GC);
|
||||
|
||||
timeout = wait_for_completion_timeout
|
||||
(&tsc->completion, ADC_TIMEOUT);
|
||||
if (timeout == 0)
|
||||
dev_err(tsc->dev, "Timeout for adc calibration\n");
|
||||
|
||||
adc_gs = readl(tsc->adc_regs + REG_ADC_GS);
|
||||
if (adc_gs & ADC_CALF)
|
||||
dev_err(tsc->dev, "ADC calibration failed\n");
|
||||
|
||||
/* TSC need the ADC work in hardware trigger */
|
||||
adc_cfg = readl(tsc->adc_regs + REG_ADC_CFG);
|
||||
adc_cfg |= ADC_HARDWARE_TRIGGER;
|
||||
writel(adc_cfg, tsc->adc_regs + REG_ADC_CFG);
|
||||
}
|
||||
|
||||
/*
|
||||
* This is a TSC workaround. Currently TSC misconnect two
|
||||
* ADC channels, this function remap channel configure for
|
||||
* hardware trigger.
|
||||
*/
|
||||
static void imx6ul_tsc_channel_config(struct imx6ul_tsc *tsc)
|
||||
{
|
||||
int adc_hc0, adc_hc1, adc_hc2, adc_hc3, adc_hc4;
|
||||
|
||||
adc_hc0 = DISABLE_CONVERSION_INT;
|
||||
writel(adc_hc0, tsc->adc_regs + REG_ADC_HC0);
|
||||
|
||||
adc_hc1 = DISABLE_CONVERSION_INT | SELECT_CHANNEL_4;
|
||||
writel(adc_hc1, tsc->adc_regs + REG_ADC_HC1);
|
||||
|
||||
adc_hc2 = DISABLE_CONVERSION_INT;
|
||||
writel(adc_hc2, tsc->adc_regs + REG_ADC_HC2);
|
||||
|
||||
adc_hc3 = DISABLE_CONVERSION_INT | SELECT_CHANNEL_1;
|
||||
writel(adc_hc3, tsc->adc_regs + REG_ADC_HC3);
|
||||
|
||||
adc_hc4 = DISABLE_CONVERSION_INT;
|
||||
writel(adc_hc4, tsc->adc_regs + REG_ADC_HC4);
|
||||
}
|
||||
|
||||
/*
|
||||
* TSC setting, confige the pre-charge time and measure delay time.
|
||||
* different touch screen may need different pre-charge time and
|
||||
* measure delay time.
|
||||
*/
|
||||
static void imx6ul_tsc_set(struct imx6ul_tsc *tsc)
|
||||
{
|
||||
int basic_setting = 0;
|
||||
int start;
|
||||
|
||||
basic_setting |= tsc->measure_delay_time << 8;
|
||||
basic_setting |= DETECT_4_WIRE_MODE | AUTO_MEASURE;
|
||||
writel(basic_setting, tsc->tsc_regs + REG_TSC_BASIC_SETING);
|
||||
|
||||
writel(DE_GLITCH_2, tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
|
||||
|
||||
writel(tsc->pre_charge_time, tsc->tsc_regs + REG_TSC_PRE_CHARGE_TIME);
|
||||
writel(MEASURE_INT_EN, tsc->tsc_regs + REG_TSC_INT_EN);
|
||||
writel(MEASURE_SIG_EN | VALID_SIG_EN,
|
||||
tsc->tsc_regs + REG_TSC_INT_SIG_EN);
|
||||
|
||||
/* start sense detection */
|
||||
start = readl(tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
|
||||
start |= START_SENSE;
|
||||
start &= ~TSC_DISABLE;
|
||||
writel(start, tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
|
||||
}
|
||||
|
||||
static void imx6ul_tsc_init(struct imx6ul_tsc *tsc)
|
||||
{
|
||||
imx6ul_adc_init(tsc);
|
||||
imx6ul_tsc_channel_config(tsc);
|
||||
imx6ul_tsc_set(tsc);
|
||||
}
|
||||
|
||||
static void imx6ul_tsc_disable(struct imx6ul_tsc *tsc)
|
||||
{
|
||||
int tsc_flow;
|
||||
int adc_cfg;
|
||||
|
||||
/* TSC controller enters to idle status */
|
||||
tsc_flow = readl(tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
|
||||
tsc_flow |= TSC_DISABLE;
|
||||
writel(tsc_flow, tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
|
||||
|
||||
/* ADC controller enters to stop mode */
|
||||
adc_cfg = readl(tsc->adc_regs + REG_ADC_HC0);
|
||||
adc_cfg |= ADC_CONV_DISABLE;
|
||||
writel(adc_cfg, tsc->adc_regs + REG_ADC_HC0);
|
||||
}
|
||||
|
||||
/* Delay some time (max 2ms), wait the pre-charge done. */
|
||||
static bool tsc_wait_detect_mode(struct imx6ul_tsc *tsc)
|
||||
{
|
||||
unsigned long timeout = jiffies + msecs_to_jiffies(2);
|
||||
int state_machine;
|
||||
int debug_mode2;
|
||||
|
||||
do {
|
||||
if (time_after(jiffies, timeout))
|
||||
return false;
|
||||
|
||||
usleep_range(200, 400);
|
||||
debug_mode2 = readl(tsc->tsc_regs + REG_TSC_DEBUG_MODE2);
|
||||
state_machine = (debug_mode2 >> 20) & 0x7;
|
||||
} while (state_machine != DETECT_MODE);
|
||||
|
||||
usleep_range(200, 400);
|
||||
return true;
|
||||
}
|
||||
|
||||
static irqreturn_t tsc_irq_fn(int irq, void *dev_id)
|
||||
{
|
||||
struct imx6ul_tsc *tsc = dev_id;
|
||||
int status;
|
||||
int value;
|
||||
int x, y;
|
||||
int start;
|
||||
|
||||
status = readl(tsc->tsc_regs + REG_TSC_INT_STATUS);
|
||||
|
||||
/* write 1 to clear the bit measure-signal */
|
||||
writel(MEASURE_SIGNAL | DETECT_SIGNAL,
|
||||
tsc->tsc_regs + REG_TSC_INT_STATUS);
|
||||
|
||||
/* It's a HW self-clean bit. Set this bit and start sense detection */
|
||||
start = readl(tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
|
||||
start |= START_SENSE;
|
||||
writel(start, tsc->tsc_regs + REG_TSC_FLOW_CONTROL);
|
||||
|
||||
if (status & MEASURE_SIGNAL) {
|
||||
value = readl(tsc->tsc_regs + REG_TSC_MEASURE_VALUE);
|
||||
x = (value >> 16) & 0x0fff;
|
||||
y = value & 0x0fff;
|
||||
|
||||
/*
|
||||
* In detect mode, we can get the xnur gpio value,
|
||||
* otherwise assume contact is stiull active.
|
||||
*/
|
||||
if (!tsc_wait_detect_mode(tsc) ||
|
||||
gpiod_get_value_cansleep(tsc->xnur_gpio)) {
|
||||
input_report_key(tsc->input, BTN_TOUCH, 1);
|
||||
input_report_abs(tsc->input, ABS_X, x);
|
||||
input_report_abs(tsc->input, ABS_Y, y);
|
||||
} else {
|
||||
input_report_key(tsc->input, BTN_TOUCH, 0);
|
||||
}
|
||||
|
||||
input_sync(tsc->input);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static irqreturn_t adc_irq_fn(int irq, void *dev_id)
|
||||
{
|
||||
struct imx6ul_tsc *tsc = dev_id;
|
||||
int coco;
|
||||
int value;
|
||||
|
||||
coco = readl(tsc->adc_regs + REG_ADC_HS);
|
||||
if (coco & 0x01) {
|
||||
value = readl(tsc->adc_regs + REG_ADC_R0);
|
||||
complete(&tsc->completion);
|
||||
}
|
||||
|
||||
return IRQ_HANDLED;
|
||||
}
|
||||
|
||||
static int imx6ul_tsc_open(struct input_dev *input_dev)
|
||||
{
|
||||
struct imx6ul_tsc *tsc = input_get_drvdata(input_dev);
|
||||
int err;
|
||||
|
||||
err = clk_prepare_enable(tsc->adc_clk);
|
||||
if (err) {
|
||||
dev_err(tsc->dev,
|
||||
"Could not prepare or enable the adc clock: %d\n",
|
||||
err);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = clk_prepare_enable(tsc->tsc_clk);
|
||||
if (err) {
|
||||
dev_err(tsc->dev,
|
||||
"Could not prepare or enable the tsc clock: %d\n",
|
||||
err);
|
||||
clk_disable_unprepare(tsc->adc_clk);
|
||||
return err;
|
||||
}
|
||||
|
||||
imx6ul_tsc_init(tsc);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void imx6ul_tsc_close(struct input_dev *input_dev)
|
||||
{
|
||||
struct imx6ul_tsc *tsc = input_get_drvdata(input_dev);
|
||||
|
||||
imx6ul_tsc_disable(tsc);
|
||||
|
||||
clk_disable_unprepare(tsc->tsc_clk);
|
||||
clk_disable_unprepare(tsc->adc_clk);
|
||||
}
|
||||
|
||||
static int imx6ul_tsc_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct device_node *np = pdev->dev.of_node;
|
||||
struct imx6ul_tsc *tsc;
|
||||
struct input_dev *input_dev;
|
||||
struct resource *tsc_mem;
|
||||
struct resource *adc_mem;
|
||||
int err;
|
||||
int tsc_irq;
|
||||
int adc_irq;
|
||||
|
||||
tsc = devm_kzalloc(&pdev->dev, sizeof(struct imx6ul_tsc), GFP_KERNEL);
|
||||
if (!tsc)
|
||||
return -ENOMEM;
|
||||
|
||||
input_dev = devm_input_allocate_device(&pdev->dev);
|
||||
if (!input_dev)
|
||||
return -ENOMEM;
|
||||
|
||||
input_dev->name = "iMX6UL TouchScreen Controller";
|
||||
input_dev->id.bustype = BUS_HOST;
|
||||
|
||||
input_dev->open = imx6ul_tsc_open;
|
||||
input_dev->close = imx6ul_tsc_close;
|
||||
|
||||
input_set_capability(input_dev, EV_KEY, BTN_TOUCH);
|
||||
input_set_abs_params(input_dev, ABS_X, 0, 0xFFF, 0, 0);
|
||||
input_set_abs_params(input_dev, ABS_Y, 0, 0xFFF, 0, 0);
|
||||
|
||||
input_set_drvdata(input_dev, tsc);
|
||||
|
||||
tsc->dev = &pdev->dev;
|
||||
tsc->input = input_dev;
|
||||
init_completion(&tsc->completion);
|
||||
|
||||
tsc->xnur_gpio = devm_gpiod_get(&pdev->dev, "xnur", GPIOD_IN);
|
||||
if (IS_ERR(tsc->xnur_gpio)) {
|
||||
err = PTR_ERR(tsc->xnur_gpio);
|
||||
dev_err(&pdev->dev,
|
||||
"failed to request GPIO tsc_X- (xnur): %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
tsc_mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
||||
tsc->tsc_regs = devm_ioremap_resource(&pdev->dev, tsc_mem);
|
||||
if (IS_ERR(tsc->tsc_regs)) {
|
||||
err = PTR_ERR(tsc->tsc_regs);
|
||||
dev_err(&pdev->dev, "failed to remap tsc memory: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
adc_mem = platform_get_resource(pdev, IORESOURCE_MEM, 1);
|
||||
tsc->adc_regs = devm_ioremap_resource(&pdev->dev, adc_mem);
|
||||
if (IS_ERR(tsc->adc_regs)) {
|
||||
err = PTR_ERR(tsc->adc_regs);
|
||||
dev_err(&pdev->dev, "failed to remap adc memory: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
tsc->tsc_clk = devm_clk_get(&pdev->dev, "tsc");
|
||||
if (IS_ERR(tsc->tsc_clk)) {
|
||||
err = PTR_ERR(tsc->tsc_clk);
|
||||
dev_err(&pdev->dev, "failed getting tsc clock: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
tsc->adc_clk = devm_clk_get(&pdev->dev, "adc");
|
||||
if (IS_ERR(tsc->adc_clk)) {
|
||||
err = PTR_ERR(tsc->adc_clk);
|
||||
dev_err(&pdev->dev, "failed getting adc clock: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
tsc_irq = platform_get_irq(pdev, 0);
|
||||
if (tsc_irq < 0) {
|
||||
dev_err(&pdev->dev, "no tsc irq resource?\n");
|
||||
return tsc_irq;
|
||||
}
|
||||
|
||||
adc_irq = platform_get_irq(pdev, 1);
|
||||
if (adc_irq <= 0) {
|
||||
dev_err(&pdev->dev, "no adc irq resource?\n");
|
||||
return adc_irq;
|
||||
}
|
||||
|
||||
err = devm_request_threaded_irq(tsc->dev, tsc_irq,
|
||||
NULL, tsc_irq_fn, IRQF_ONESHOT,
|
||||
dev_name(&pdev->dev), tsc);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev,
|
||||
"failed requesting tsc irq %d: %d\n",
|
||||
tsc_irq, err);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = devm_request_irq(tsc->dev, adc_irq, adc_irq_fn, 0,
|
||||
dev_name(&pdev->dev), tsc);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev,
|
||||
"failed requesting adc irq %d: %d\n",
|
||||
adc_irq, err);
|
||||
return err;
|
||||
}
|
||||
|
||||
err = of_property_read_u32(np, "measure-delay-time",
|
||||
&tsc->measure_delay_time);
|
||||
if (err)
|
||||
tsc->measure_delay_time = 0xffff;
|
||||
|
||||
err = of_property_read_u32(np, "pre-charge-time",
|
||||
&tsc->pre_charge_time);
|
||||
if (err)
|
||||
tsc->pre_charge_time = 0xfff;
|
||||
|
||||
err = input_register_device(tsc->input);
|
||||
if (err) {
|
||||
dev_err(&pdev->dev,
|
||||
"failed to register input device: %d\n", err);
|
||||
return err;
|
||||
}
|
||||
|
||||
platform_set_drvdata(pdev, tsc);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused imx6ul_tsc_suspend(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct imx6ul_tsc *tsc = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = tsc->input;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (input_dev->users) {
|
||||
imx6ul_tsc_disable(tsc);
|
||||
|
||||
clk_disable_unprepare(tsc->tsc_clk);
|
||||
clk_disable_unprepare(tsc->adc_clk);
|
||||
}
|
||||
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int __maybe_unused imx6ul_tsc_resume(struct device *dev)
|
||||
{
|
||||
struct platform_device *pdev = to_platform_device(dev);
|
||||
struct imx6ul_tsc *tsc = platform_get_drvdata(pdev);
|
||||
struct input_dev *input_dev = tsc->input;
|
||||
int retval = 0;
|
||||
|
||||
mutex_lock(&input_dev->mutex);
|
||||
|
||||
if (input_dev->users) {
|
||||
retval = clk_prepare_enable(tsc->adc_clk);
|
||||
if (retval)
|
||||
goto out;
|
||||
|
||||
retval = clk_prepare_enable(tsc->tsc_clk);
|
||||
if (retval) {
|
||||
clk_disable_unprepare(tsc->adc_clk);
|
||||
goto out;
|
||||
}
|
||||
|
||||
imx6ul_tsc_init(tsc);
|
||||
}
|
||||
|
||||
out:
|
||||
mutex_unlock(&input_dev->mutex);
|
||||
return retval;
|
||||
}
|
||||
|
||||
static SIMPLE_DEV_PM_OPS(imx6ul_tsc_pm_ops,
|
||||
imx6ul_tsc_suspend, imx6ul_tsc_resume);
|
||||
|
||||
static const struct of_device_id imx6ul_tsc_match[] = {
|
||||
{ .compatible = "fsl,imx6ul-tsc", },
|
||||
{ /* sentinel */ }
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, imx6ul_tsc_match);
|
||||
|
||||
static struct platform_driver imx6ul_tsc_driver = {
|
||||
.driver = {
|
||||
.name = "imx6ul-tsc",
|
||||
.of_match_table = imx6ul_tsc_match,
|
||||
.pm = &imx6ul_tsc_pm_ops,
|
||||
},
|
||||
.probe = imx6ul_tsc_probe,
|
||||
};
|
||||
module_platform_driver(imx6ul_tsc_driver);
|
||||
|
||||
MODULE_AUTHOR("Haibo Chen <haibo.chen@freescale.com>");
|
||||
MODULE_DESCRIPTION("Freescale i.MX6UL Touchscreen controller driver");
|
||||
MODULE_LICENSE("GPL v2");
|
||||
Loading…
Reference in New Issue
Block a user