On 2016-06-24 12:44, Anthony Felice wrote:
> Add driver for the Vybrid Tower CRTouch-based touchscreen. This is
> required for the touchscreen on the TWR-LCD-RGB to work on the Vybrid
> Tower platform.
>
> There is a known issue with this driver: rarely, SW1 on the TWR-LCD-RGB
> module needs to be pressed in order for the touchscreen to begin
> functioning.
>
> Signed-off-by: Anthony Felice <tony.felice@xxxxxxxxxxx>
> ---
> .../bindings/input/touchscreen/crtouch_ts.txt | 14 ++
> drivers/input/touchscreen/Kconfig | 10 +
> drivers/input/touchscreen/Makefile | 1 +
> drivers/input/touchscreen/crtouch_ts.c | 279 +++++++++++++++++++++
> 4 files changed, 304 insertions(+)
> create mode 100644
> Documentation/devicetree/bindings/input/touchscreen/crtouch_ts.txt
> create mode 100644 drivers/input/touchscreen/crtouch_ts.c
>
> diff --git
> a/Documentation/devicetree/bindings/input/touchscreen/crtouch_ts.txt
> b/Documentation/devicetree/bindings/input/touchscreen/crtouch_ts.txt
> new file mode 100644
> index 0000000..cfb966c
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/input/touchscreen/crtouch_ts.txt
> @@ -0,0 +1,14 @@
> +* Freescale CRTOUCH based touchscreen
> +
> +Required Properties:
> +- compatible must be fsl,crtouch_ts
Compatible strings usually use a dash instead of underline.
> +- reg: I2C address of the touchscreen
> +- irq-gpio: GPIO to use as event IRQ
> +
> +Example:
> +
> + touch: crtouch@49 {
> + compatible = "fsl,crtouch_ts";
> + reg = <0x49>;
> + irq-gpio = <&gpio0 21 GPIO_ACTIVE_HIGH>;
> + };
> diff --git a/drivers/input/touchscreen/Kconfig
> b/drivers/input/touchscreen/Kconfig
> index 8ecdc38..799e342 100644
> --- a/drivers/input/touchscreen/Kconfig
> +++ b/drivers/input/touchscreen/Kconfig
> @@ -1155,4 +1155,14 @@ config TOUCHSCREEN_ROHM_BU21023
> To compile this driver as a module, choose M here: the
> module will be called bu21023_ts.
>
> +config TOUCHSCREEN_CRTOUCH
> + tristate "Freescale CRTOUCH based touchscreen"
> + depends on I2C
You probably also need to add OF here.
> + help
> + Say Y here if you have a CRTOUCH based touchscreen
> + controller.
> +
> + To compile this driver as a module, choose M here: the
> + module will be called crtouch_ts.
> +
> endif
> diff --git a/drivers/input/touchscreen/Makefile
> b/drivers/input/touchscreen/Makefile
> index f42975e..8cb0a7a 100644
> --- a/drivers/input/touchscreen/Makefile
> +++ b/drivers/input/touchscreen/Makefile
> @@ -95,3 +95,4 @@ obj-$(CONFIG_TOUCHSCREEN_TPS6507X) += tps6507x-ts.o
> obj-$(CONFIG_TOUCHSCREEN_ZFORCE) += zforce_ts.o
> obj-$(CONFIG_TOUCHSCREEN_COLIBRI_VF50) += colibri-vf50-ts.o
> obj-$(CONFIG_TOUCHSCREEN_ROHM_BU21023) += rohm_bu21023.o
> +obj-$(CONFIG_TOUCHSCREEN_CRTOUCH) += crtouch_ts.o
> diff --git a/drivers/input/touchscreen/crtouch_ts.c
> b/drivers/input/touchscreen/crtouch_ts.c
> new file mode 100644
> index 0000000..bb87a8e
> --- /dev/null
> +++ b/drivers/input/touchscreen/crtouch_ts.c
> @@ -0,0 +1,279 @@
> +/*
> + * Driver for Freescale Semiconductor CRTOUCH - A Resistive and Capacitive
> + * touch device with i2c interface
> + *
> + * Copyright 2012 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 as published by
> + * the Free Software Foundation; either version 2 of the License, or
> + * (at your option) any later version.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/i2c.h>
> +#include <linux/interrupt.h>
> +#include <linux/input.h>
> +#include <linux/input/mt.h>
> +#include <linux/slab.h>
> +#include <linux/bitops.h>
> +#include <linux/gpio.h>
> +#include <linux/of.h>
> +#include <linux/of_gpio.h>
> +
> +/* Resistive touch sense status registers */
> +#define RES_STA_ERROR 0x00
> +#define RES_STA_STATUS1 0x01
> +#define RES_STA_STATUS2 0x02
Nit: there is a tab between define and RES_STA_STATUS2, all other lines
have spaces.
--
Stefan
<snip>
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