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openwrt-owl/target/linux/s3c24xx/patches-2.6.26/1014-s3c2410_touchscreen.pa...

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From fc5d5366335469828d78898e2e74f8f80aa1d076 Mon Sep 17 00:00:00 2001
From: mokopatches <mokopatches@openmoko.org>
Date: Wed, 16 Jul 2008 14:44:49 +0100
Subject: [PATCH] s3c2410_touchscreen.patch
---
arch/arm/mach-s3c2410/mach-h1940.c | 8 +
arch/arm/plat-s3c24xx/devs.c | 18 ++
arch/arm/plat-s3c24xx/s3c244x.c | 1 +
drivers/input/touchscreen/Kconfig | 18 ++
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/s3c2410_ts.c | 437 ++++++++++++++++++++++++++++++++
include/asm-arm/arch-s3c2410/ts.h | 28 ++
include/asm-arm/plat-s3c24xx/devs.h | 1 +
8 files changed, 512 insertions(+), 0 deletions(-)
create mode 100644 drivers/input/touchscreen/s3c2410_ts.c
create mode 100644 include/asm-arm/arch-s3c2410/ts.h
diff --git a/arch/arm/mach-s3c2410/mach-h1940.c b/arch/arm/mach-s3c2410/mach-h1940.c
index 7c1145e..93cd8c8 100644
--- a/arch/arm/mach-s3c2410/mach-h1940.c
+++ b/arch/arm/mach-s3c2410/mach-h1940.c
@@ -38,6 +38,7 @@
#include <asm/arch/h1940.h>
#include <asm/arch/h1940-latch.h>
#include <asm/arch/fb.h>
+#include <asm/arch/tc.h>
#include <asm/plat-s3c24xx/udc.h>
#include <asm/plat-s3c24xx/clock.h>
@@ -129,6 +130,11 @@ static struct s3c2410_udc_mach_info h1940_udc_cfg __initdata = {
.vbus_pin_inverted = 1,
};
+static struct s3c2410_ts_mach_info h1940_ts_cfg __initdata = {
+ .delay = 10000,
+ .presc = 49,
+ .oversampling_shift = 2,
+};
/**
* Set lcd on or off
@@ -186,6 +192,7 @@ static struct platform_device *h1940_devices[] __initdata = {
&s3c_device_i2c,
&s3c_device_iis,
&s3c_device_usbgadget,
+ &s3c_device_ts,
&s3c_device_leds,
&s3c_device_bluetooth,
};
@@ -214,6 +221,7 @@ static void __init h1940_init(void)
u32 tmp;
s3c24xx_fb_set_platdata(&h1940_fb_info);
+ set_s3c2410ts_info(&h1940_ts_cfg);
s3c24xx_udc_set_platdata(&h1940_udc_cfg);
/* Turn off suspend on both USB ports, and switch the
diff --git a/arch/arm/plat-s3c24xx/devs.c b/arch/arm/plat-s3c24xx/devs.c
index e546e93..c1fbe2d 100644
--- a/arch/arm/plat-s3c24xx/devs.c
+++ b/arch/arm/plat-s3c24xx/devs.c
@@ -24,6 +24,7 @@
#include <asm/mach/map.h>
#include <asm/mach/irq.h>
#include <asm/arch/fb.h>
+#include <asm/arch/ts.h>
#include <asm/hardware.h>
#include <asm/io.h>
#include <asm/irq.h>
@@ -207,6 +208,23 @@ struct platform_device s3c_device_nand = {
EXPORT_SYMBOL(s3c_device_nand);
+/* Touchscreen */
+struct platform_device s3c_device_ts = {
+ .name = "s3c2410-ts",
+ .id = -1,
+};
+
+EXPORT_SYMBOL(s3c_device_ts);
+
+static struct s3c2410_ts_mach_info s3c2410ts_info;
+
+void set_s3c2410ts_info(struct s3c2410_ts_mach_info *hard_s3c2410ts_info)
+{
+ memcpy(&s3c2410ts_info,hard_s3c2410ts_info,sizeof(struct s3c2410_ts_mach_info));
+ s3c_device_ts.dev.platform_data = &s3c2410ts_info;
+}
+EXPORT_SYMBOL(set_s3c2410ts_info);
+
/* USB Device (Gadget)*/
static struct resource s3c_usbgadget_resource[] = {
diff --git a/arch/arm/plat-s3c24xx/s3c244x.c b/arch/arm/plat-s3c24xx/s3c244x.c
index 2f01af5..7a1a12d 100644
--- a/arch/arm/plat-s3c24xx/s3c244x.c
+++ b/arch/arm/plat-s3c24xx/s3c244x.c
@@ -68,6 +68,7 @@ void __init s3c244x_map_io(struct map_desc *mach_desc, int size)
s3c_device_sdi.name = "s3c2440-sdi";
s3c_device_i2c.name = "s3c2440-i2c";
s3c_device_nand.name = "s3c2440-nand";
+ s3c_device_ts.name = "s3c2440-ts";
s3c_device_usbgadget.name = "s3c2440-usbgadget";
}
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 565ec71..52de2b0 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -67,6 +67,24 @@ config TOUCHSCREEN_FUJITSU
To compile this driver as a module, choose M here: the
module will be called fujitsu-ts.
+config TOUCHSCREEN_S3C2410
+ tristate "Samsung S3C2410 touchscreen input driver"
+ depends on ARCH_S3C2410 && INPUT && INPUT_TOUCHSCREEN
+ select SERIO
+ help
+ Say Y here if you have the s3c2410 touchscreen.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called s3c2410_ts.
+
+config TOUCHSCREEN_S3C2410_DEBUG
+ boolean "Samsung S3C2410 touchscreen debug messages"
+ depends on TOUCHSCREEN_S3C2410
+ help
+ Select this if you want debug messages
+
config TOUCHSCREEN_GUNZE
tristate "Gunze AHL-51S touchscreen"
select SERIO
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 3c096d7..7c3bd1c 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -26,3 +26,4 @@ wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9705) += wm9705.o
wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9712) += wm9712.o
wm97xx-ts-$(CONFIG_TOUCHSCREEN_WM9713) += wm9713.o
obj-$(CONFIG_TOUCHSCREEN_WM97XX_MAINSTONE) += mainstone-wm97xx.o
+obj-$(CONFIG_TOUCHSCREEN_S3C2410) += s3c2410_ts.o
diff --git a/drivers/input/touchscreen/s3c2410_ts.c b/drivers/input/touchscreen/s3c2410_ts.c
new file mode 100644
index 0000000..68071c2
--- /dev/null
+++ b/drivers/input/touchscreen/s3c2410_ts.c
@@ -0,0 +1,437 @@
+/*
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ * Copyright (c) 2004 Arnaud Patard <arnaud.patard@rtp-net.org>
+ * iPAQ H1940 touchscreen support
+ *
+ * ChangeLog
+ *
+ * 2004-09-05: Herbert Pötzl <herbert@13thfloor.at>
+ * - added clock (de-)allocation code
+ *
+ * 2005-03-06: Arnaud Patard <arnaud.patard@rtp-net.org>
+ * - h1940_ -> s3c2410 (this driver is now also used on the n30
+ * machines :P)
+ * - Debug messages are now enabled with the config option
+ * TOUCHSCREEN_S3C2410_DEBUG
+ * - Changed the way the value are read
+ * - Input subsystem should now work
+ * - Use ioremap and readl/writel
+ *
+ * 2005-03-23: Arnaud Patard <arnaud.patard@rtp-net.org>
+ * - Make use of some undocumented features of the touchscreen
+ * controller
+ *
+ * 2007-05-23: Harald Welte <laforge@openmoko.org>
+ * - Add proper support for S32440
+ */
+
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/input.h>
+#include <linux/init.h>
+#include <linux/serio.h>
+#include <linux/delay.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <asm/io.h>
+#include <asm/irq.h>
+
+#include <asm/arch/regs-gpio.h>
+#include <asm/arch/ts.h>
+
+#include <asm/plat-s3c/regs-adc.h>
+
+/* For ts.dev.id.version */
+#define S3C2410TSVERSION 0x0101
+
+#define TSC_SLEEP (S3C2410_ADCTSC_PULL_UP_DISABLE | S3C2410_ADCTSC_XY_PST(0))
+
+#define WAIT4INT(x) (((x)<<8) | \
+ S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | S3C2410_ADCTSC_XP_SEN | \
+ S3C2410_ADCTSC_XY_PST(3))
+
+#define AUTOPST (S3C2410_ADCTSC_YM_SEN | S3C2410_ADCTSC_YP_SEN | S3C2410_ADCTSC_XP_SEN | \
+ S3C2410_ADCTSC_AUTO_PST | S3C2410_ADCTSC_XY_PST(0))
+
+#define DEBUG_LVL KERN_DEBUG
+
+MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>");
+MODULE_DESCRIPTION("s3c2410 touchscreen driver");
+MODULE_LICENSE("GPL");
+
+/*
+ * Definitions & global arrays.
+ */
+
+
+static char *s3c2410ts_name = "s3c2410 TouchScreen";
+
+/*
+ * Per-touchscreen data.
+ */
+
+struct s3c2410ts {
+ struct input_dev *dev;
+ long xp;
+ long yp;
+ int count;
+ int shift;
+};
+
+static struct s3c2410ts ts;
+static void __iomem *base_addr;
+
+static inline void s3c2410_ts_connect(void)
+{
+ s3c2410_gpio_cfgpin(S3C2410_GPG12, S3C2410_GPG12_XMON);
+ s3c2410_gpio_cfgpin(S3C2410_GPG13, S3C2410_GPG13_nXPON);
+ s3c2410_gpio_cfgpin(S3C2410_GPG14, S3C2410_GPG14_YMON);
+ s3c2410_gpio_cfgpin(S3C2410_GPG15, S3C2410_GPG15_nYPON);
+}
+
+static void touch_timer_fire(unsigned long data)
+{
+ unsigned long data0;
+ unsigned long data1;
+ int updown;
+
+ data0 = readl(base_addr+S3C2410_ADCDAT0);
+ data1 = readl(base_addr+S3C2410_ADCDAT1);
+
+ updown = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && (!(data1 & S3C2410_ADCDAT0_UPDOWN));
+
+ if (updown) {
+ if (ts.count != 0) {
+ ts.xp >>= ts.shift;
+ ts.yp >>= ts.shift;
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ {
+ struct timeval tv;
+ do_gettimeofday(&tv);
+ printk(DEBUG_LVL "T: %06d, X: %03ld, Y: %03ld\n", (int)tv.tv_usec, ts.xp, ts.yp);
+ }
+#endif
+
+ input_report_abs(ts.dev, ABS_X, ts.xp);
+ input_report_abs(ts.dev, ABS_Y, ts.yp);
+
+ input_report_key(ts.dev, BTN_TOUCH, 1);
+ input_report_abs(ts.dev, ABS_PRESSURE, 1);
+ input_sync(ts.dev);
+ }
+
+ ts.xp = 0;
+ ts.yp = 0;
+ ts.count = 0;
+
+ writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST, base_addr+S3C2410_ADCTSC);
+ writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_ENABLE_START, base_addr+S3C2410_ADCCON);
+ } else {
+ ts.count = 0;
+
+ input_report_key(ts.dev, BTN_TOUCH, 0);
+ input_report_abs(ts.dev, ABS_PRESSURE, 0);
+ input_sync(ts.dev);
+
+ writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC);
+ }
+}
+
+static struct timer_list touch_timer =
+ TIMER_INITIALIZER(touch_timer_fire, 0, 0);
+
+static irqreturn_t stylus_updown(int irq, void *dev_id)
+{
+ unsigned long data0;
+ unsigned long data1;
+ int updown;
+
+ data0 = readl(base_addr+S3C2410_ADCDAT0);
+ data1 = readl(base_addr+S3C2410_ADCDAT1);
+
+ updown = (!(data0 & S3C2410_ADCDAT0_UPDOWN)) && (!(data1 & S3C2410_ADCDAT0_UPDOWN));
+
+ /* TODO we should never get an interrupt with updown set while
+ * the timer is running, but maybe we ought to verify that the
+ * timer isn't running anyways. */
+
+ if (updown)
+ touch_timer_fire(0);
+
+ return IRQ_HANDLED;
+}
+
+
+static irqreturn_t stylus_action(int irq, void *dev_id)
+{
+ unsigned long data0;
+ unsigned long data1;
+
+ data0 = readl(base_addr+S3C2410_ADCDAT0);
+ data1 = readl(base_addr+S3C2410_ADCDAT1);
+
+ ts.xp += data0 & S3C2410_ADCDAT0_XPDATA_MASK;
+ ts.yp += data1 & S3C2410_ADCDAT1_YPDATA_MASK;
+ ts.count++;
+
+ if (ts.count < (1<<ts.shift)) {
+ writel(S3C2410_ADCTSC_PULL_UP_DISABLE | AUTOPST, base_addr+S3C2410_ADCTSC);
+ writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_ENABLE_START, base_addr+S3C2410_ADCCON);
+ } else {
+ mod_timer(&touch_timer, jiffies+1);
+ writel(WAIT4INT(1), base_addr+S3C2410_ADCTSC);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static struct clk *adc_clock;
+
+/*
+ * The functions for inserting/removing us as a module.
+ */
+
+static int __init s3c2410ts_probe(struct platform_device *pdev)
+{
+ int rc;
+ struct s3c2410_ts_mach_info *info;
+ struct input_dev *input_dev;
+
+ info = ( struct s3c2410_ts_mach_info *)pdev->dev.platform_data;
+
+ if (!info)
+ {
+ printk(KERN_ERR "Hm... too bad : no platform data for ts\n");
+ return -EINVAL;
+ }
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ printk(DEBUG_LVL "Entering s3c2410ts_init\n");
+#endif
+
+ adc_clock = clk_get(NULL, "adc");
+ if (!adc_clock) {
+ printk(KERN_ERR "failed to get adc clock source\n");
+ return -ENOENT;
+ }
+ clk_enable(adc_clock);
+
+#ifdef CONFIG_TOUCHSCREEN_S3C2410_DEBUG
+ printk(DEBUG_LVL "got and enabled clock\n");
+#endif
+
+ base_addr = ioremap(S3C2410_PA_ADC,0x20);
+ if (base_addr == NULL) {
+ printk(KERN_ERR "Failed to remap register block\n");
+ return -ENOMEM;
+ }
+
+
+ /* If we acutally are a S3C2410: Configure GPIOs */
+ if (!strcmp(pdev->name, "s3c2410-ts"))
+ s3c2410_ts_connect();
+
+ if ((info->presc&0xff) > 0)
+ writel(S3C2410_ADCCON_PRSCEN | S3C2410_ADCCON_PRSCVL(info->presc&0xFF),\
+ base_addr+S3C2410_ADCCON);
+ else
+ writel(0,base_addr+S3C2410_ADCCON);
+
+
+ /* Initialise registers */
+ if ((info->delay&0xffff) > 0)
+ writel(info->delay & 0xffff, base_addr+S3C2410_ADCDLY);
+
+ writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC);
+
+ /* Initialise input stuff */
+ memset(&ts, 0, sizeof(struct s3c2410ts));
+ input_dev = input_allocate_device();
+
+ if (!input_dev) {
+ printk(KERN_ERR "Unable to allocate the input device !!\n");
+ return -ENOMEM;
+ }
+
+ ts.dev = input_dev;
+ ts.dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_KEY) |
+ BIT_MASK(EV_ABS);
+ ts.dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+ input_set_abs_params(ts.dev, ABS_X, 0, 0x3FF, 0, 0);
+ input_set_abs_params(ts.dev, ABS_Y, 0, 0x3FF, 0, 0);
+ input_set_abs_params(ts.dev, ABS_PRESSURE, 0, 1, 0, 0);
+
+ ts.dev->private = &ts;
+ ts.dev->name = s3c2410ts_name;
+ ts.dev->id.bustype = BUS_RS232;
+ ts.dev->id.vendor = 0xDEAD;
+ ts.dev->id.product = 0xBEEF;
+ ts.dev->id.version = S3C2410TSVERSION;
+
+ ts.shift = info->oversampling_shift;
+
+ /* Get irqs */
+ if (request_irq(IRQ_ADC, stylus_action, IRQF_SAMPLE_RANDOM,
+ "s3c2410_action", ts.dev)) {
+ printk(KERN_ERR "s3c2410_ts.c: Could not allocate ts IRQ_ADC !\n");
+ iounmap(base_addr);
+ return -EIO;
+ }
+ if (request_irq(IRQ_TC, stylus_updown, IRQF_SAMPLE_RANDOM,
+ "s3c2410_action", ts.dev)) {
+ printk(KERN_ERR "s3c2410_ts.c: Could not allocate ts IRQ_TC !\n");
+ free_irq(IRQ_ADC, ts.dev);
+ iounmap(base_addr);
+ return -EIO;
+ }
+
+ printk(KERN_INFO "%s successfully loaded\n", s3c2410ts_name);
+
+ /* All went ok, so register to the input system */
+ rc = input_register_device(ts.dev);
+ if (rc) {
+ free_irq(IRQ_TC, ts.dev);
+ free_irq(IRQ_ADC, ts.dev);
+ clk_disable(adc_clock);
+ iounmap(base_addr);
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int s3c2410ts_remove(struct platform_device *pdev)
+{
+ disable_irq(IRQ_ADC);
+ disable_irq(IRQ_TC);
+ free_irq(IRQ_TC,ts.dev);
+ free_irq(IRQ_ADC,ts.dev);
+
+ if (adc_clock) {
+ clk_disable(adc_clock);
+ clk_put(adc_clock);
+ adc_clock = NULL;
+ }
+
+ input_unregister_device(ts.dev);
+ iounmap(base_addr);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM
+static int s3c2410ts_suspend(struct platform_device *pdev, pm_message_t state)
+{
+ writel(TSC_SLEEP, base_addr+S3C2410_ADCTSC);
+ writel(readl(base_addr+S3C2410_ADCCON) | S3C2410_ADCCON_STDBM,
+ base_addr+S3C2410_ADCCON);
+
+ disable_irq(IRQ_ADC);
+ disable_irq(IRQ_TC);
+
+ clk_disable(adc_clock);
+
+ return 0;
+}
+
+static int s3c2410ts_resume(struct platform_device *pdev)
+{
+ struct s3c2410_ts_mach_info *info =
+ ( struct s3c2410_ts_mach_info *)pdev->dev.platform_data;
+
+ clk_enable(adc_clock);
+ msleep(1);
+
+ enable_irq(IRQ_ADC);
+ enable_irq(IRQ_TC);
+
+ if ((info->presc&0xff) > 0)
+ writel(S3C2410_ADCCON_PRSCEN | S3C2410_ADCCON_PRSCVL(info->presc&0xFF),\
+ base_addr+S3C2410_ADCCON);
+ else
+ writel(0,base_addr+S3C2410_ADCCON);
+
+ /* Initialise registers */
+ if ((info->delay&0xffff) > 0)
+ writel(info->delay & 0xffff, base_addr+S3C2410_ADCDLY);
+
+ writel(WAIT4INT(0), base_addr+S3C2410_ADCTSC);
+
+ return 0;
+}
+
+#else
+#define s3c2410ts_suspend NULL
+#define s3c2410ts_resume NULL
+#endif
+
+static struct platform_driver s3c2410ts_driver = {
+ .driver = {
+ .name = "s3c2410-ts",
+ .owner = THIS_MODULE,
+ },
+ .probe = s3c2410ts_probe,
+ .remove = s3c2410ts_remove,
+ .suspend = s3c2410ts_suspend,
+ .resume = s3c2410ts_resume,
+
+};
+
+static struct platform_driver s3c2440ts_driver = {
+ .driver = {
+ .name = "s3c2440-ts",
+ .owner = THIS_MODULE,
+ },
+ .probe = s3c2410ts_probe,
+ .remove = s3c2410ts_remove,
+ .suspend = s3c2410ts_suspend,
+ .resume = s3c2410ts_resume,
+
+};
+
+static int __init s3c2410ts_init(void)
+{
+ int rc;
+
+ rc = platform_driver_register(&s3c2410ts_driver);
+ if (rc < 0)
+ return rc;
+
+ rc = platform_driver_register(&s3c2440ts_driver);
+ if (rc < 0)
+ platform_driver_unregister(&s3c2410ts_driver);
+
+ return rc;
+}
+
+static void __exit s3c2410ts_exit(void)
+{
+ platform_driver_unregister(&s3c2440ts_driver);
+ platform_driver_unregister(&s3c2410ts_driver);
+}
+
+module_init(s3c2410ts_init);
+module_exit(s3c2410ts_exit);
+
+/*
+ Local variables:
+ compile-command: "make ARCH=arm CROSS_COMPILE=/usr/local/arm/3.3.2/bin/arm-linux- -k -C ../../.."
+ c-basic-offset: 8
+ End:
+*/
diff --git a/include/asm-arm/arch-s3c2410/ts.h b/include/asm-arm/arch-s3c2410/ts.h
new file mode 100644
index 0000000..593632a
--- /dev/null
+++ b/include/asm-arm/arch-s3c2410/ts.h
@@ -0,0 +1,28 @@
+/* linux/include/asm/arch-s3c2410/ts.h
+ *
+ * Copyright (c) 2005 Arnaud Patard <arnaud.patard@rtp-net.org>
+ *
+ *
+ * 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.
+ *
+ *
+ * Changelog:
+ * 24-Mar-2005 RTP Created file
+ * 03-Aug-2005 RTP Renamed to ts.h
+ */
+
+#ifndef __ASM_ARM_TS_H
+#define __ASM_ARM_TS_H
+
+struct s3c2410_ts_mach_info {
+ int delay;
+ int presc;
+ int oversampling_shift;
+};
+
+void set_s3c2410ts_info(struct s3c2410_ts_mach_info *hard_s3c2410ts_info);
+
+#endif /* __ASM_ARM_TS_H */
+
diff --git a/include/asm-arm/plat-s3c24xx/devs.h b/include/asm-arm/plat-s3c24xx/devs.h
index f9d6f03..43de9cc 100644
--- a/include/asm-arm/plat-s3c24xx/devs.h
+++ b/include/asm-arm/plat-s3c24xx/devs.h
@@ -42,6 +42,7 @@ extern struct platform_device s3c_device_timer2;
extern struct platform_device s3c_device_timer3;
extern struct platform_device s3c_device_usbgadget;
+extern struct platform_device s3c_device_ts;
/* s3c2440 specific devices */
--
1.5.6.3
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