From: hhb <hhb@rock-chips.com>
Date: Wed, 23 Mar 2011 08:12:49 +0000 (+0800)
Subject: add gt801 touch screen driver
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=9013c7ddde2dd09707d5dc90c6b731ee411c1973;p=firefly-linux-kernel-4.4.55.git
add gt801 touch screen driver
---
diff --git a/arch/arm/mach-rk29/board-rk29-phonesdk.c b/arch/arm/mach-rk29/board-rk29-phonesdk.c
index 3cb3453a6ea1..3e4a2b858546 100755
--- a/arch/arm/mach-rk29/board-rk29-phonesdk.c
+++ b/arch/arm/mach-rk29/board-rk29-phonesdk.c
@@ -357,6 +357,28 @@ struct p1003_platform_data p1003_info = {
};
#endif
+
+#if defined(CONFIG_TOUCHSCREEN_GT801_IIC)
+#include "../../../drivers/input/touchscreen/gt801_ts.h"
+#define GT801_GPIO_INT RK29_PIN4_PD5
+#define GT801_GPIO_RESET RK29_PIN6_PC3
+static struct gt801_platform_data gt801_info = {
+ .model = 801,
+ .swap_xy = 0,
+ .x_min = 0,
+ .x_max = 480,
+ .y_min = 0,
+ .y_max = 800,
+ .gpio_reset = GT801_GPIO_RESET,
+ .gpio_reset_active_low = 1,
+ .gpio_pendown = GT801_GPIO_INT,
+ .pendown_iomux_name = GPIO4D5_CPUTRACECTL_NAME,
+ .resetpin_iomux_name = NULL,
+ .pendown_iomux_mode = GPIO4H_GPIO4D5,
+ .resetpin_iomux_mode = 0,
+};
+#endif
+
#if defined (CONFIG_EETI_EGALAX)
#define TOUCH_RESET_PIN RK29_PIN6_PC3
#define TOUCH_INT_PIN RK29_PIN4_PD5
@@ -1403,6 +1425,15 @@ static struct i2c_board_info __initdata board_i2c1_devices[] = {
#ifdef CONFIG_I2C2_RK29
static struct i2c_board_info __initdata board_i2c2_devices[] = {
+#if defined (CONFIG_TOUCHSCREEN_GT801_IIC)
+{
+ .type = "gt801_ts",
+ .addr = 0x55,
+ .flags = 0,
+ .irq = RK29_PIN4_PD5,
+ .platform_data = >801_info,
+},
+#endif
#if defined (CONFIG_MFD_WM831X_I2C)
{
.type = "wm8310",
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index 0e9e0bbdfee2..425f28ba19dc 100755
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -742,4 +742,7 @@ config TOUCHSCREEN_IT7260
If unsure, say N (but it's safe to say "Y").
+config TOUCHSCREEN_GT801_IIC
+ tristate "GT801_IIC based touchscreens"
+ depends on I2C2_RK29
endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index e2288952af1d..71076518e8e9 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -53,3 +53,4 @@ obj-$(CONFIG_TOUCHSCREEN_IT7260) += it7260_ts.o
obj-$(CONFIG_SINTEK_3FA16) += sintek_3FA16.o
obj-$(CONFIG_EETI_EGALAX) += eeti_egalax_i2c.o
obj-$(CONFIG_ATMEL_MXT224) += atmel_mxt224.o
+obj-$(CONFIG_TOUCHSCREEN_GT801_IIC) += gt801_ts.o
diff --git a/drivers/input/touchscreen/gt801_ts.c b/drivers/input/touchscreen/gt801_ts.c
new file mode 100755
index 000000000000..d7a46b25fc71
--- /dev/null
+++ b/drivers/input/touchscreen/gt801_ts.c
@@ -0,0 +1,644 @@
+/*
+ * drivers/input/touchscreen/gt801_ts.c
+ *
+ * Copyright (C) 2010 ROCKCHIP, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/earlysuspend.h>
+#include <linux/hrtimer.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/gpio.h>
+#include <mach/iomux.h>
+#include <linux/platform_device.h>
+
+#include "gt801_ts.h"
+
+#define GT801_DEBUG 0
+#if GT801_DEBUG
+ #define gt801printk(msg...) printk(msg);
+#else
+ #define gt801printk(msg...)
+#endif
+
+#define SINGLTOUCH_MODE 0
+#define GT801_REGS_NUM 53
+
+#if SINGLTOUCH_MODE
+ #define TOUCH_NUMBER 1
+#else
+ #define TOUCH_NUMBER 2
+#endif
+
+#define TOUCH_REG_NUM 5 //ÿ×é×ø±êÐèÒªµÄ¼Ä´æÆ÷ÊýÄ¿
+
+const unsigned char GT801_RegData[GT801_REGS_NUM]={
+ 0x19,0x05,0x06,0x28,0x02,0x14,0x14,0x10,0x40,0xB0,0x01,0xE0,0x03,0x4C,0x78,0x9A,0xBC,0xDE,0x65,0x43,0x20,0x11,0x00,0x00,0x00,0x00,0x05,0xCF,0x20,0x0B,0x0D,0x8D,0x32,0x3C,0x1E,0x28,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01
+};
+
+struct gt801_ts_data {
+ u16 model; /* 801. */
+ bool swap_xy; /* swap x and y axes */
+ u16 x_min, x_max;
+ u16 y_min, y_max;
+ uint16_t addr;
+ int use_irq;
+ int gpio_pendown;
+ int gpio_reset;
+ int gpio_reset_active_low;
+ int pendown_iomux_mode;
+ int resetpin_iomux_mode;
+ char pendown_iomux_name[IOMUX_NAME_SIZE];
+ char resetpin_iomux_name[IOMUX_NAME_SIZE];
+ char phys[32];
+ char name[32];
+ struct i2c_client *client;
+ struct input_dev *input_dev;
+ struct hrtimer timer;
+ struct work_struct work;
+ struct early_suspend early_suspend;
+};
+/*tochscreen private data*/
+static int touch_state[TOUCH_NUMBER] = {TOUCH_UP,TOUCH_UP};
+static struct workqueue_struct *gt801_wq;
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void gt801_ts_early_suspend(struct early_suspend *h);
+static void gt801_ts_late_resume(struct early_suspend *h);
+#endif
+
+static int verify_coord(struct gt801_ts_data *ts,unsigned short *x,unsigned short *y)
+{
+
+ gt801printk("%s:(%d/%d)\n",__FUNCTION__,*x, *y);
+ if((*x< ts->x_min) || (*x > ts->x_max))
+ return -1;
+
+ if((*y< ts->y_min) || (*y > ts->y_max))
+ return -1;
+// *x = ts->x_max - *x;
+ //if(*y <780)
+ *y = ts->y_max -*y;
+
+ return 0;
+}
+
+/*read the gt801 register ,used i2c bus*/
+static int gt801_read_regs(struct i2c_client *client, u8 reg, u8 buf[], unsigned len)
+{
+ int ret;
+ ret =i2c_master_reg8_recv(client, reg, buf, len, 200*1000);
+ if(ret < 0)
+ printk("gt801_ts_work_func:i2c_transfer fail =%d\n",ret);
+ return ret;
+}
+/* set the gt801 registe,used i2c bus*/
+static int gt801_write_regs(struct i2c_client *client, u8 reg, u8 const buf[], unsigned short len)
+{
+ int ret;
+ ret = i2c_master_reg8_send(client,reg, buf, len, 200*1000);
+ if (ret < 0) {
+ printk("gt801_ts_work_func:i2c_transfer fail =%d\n",ret);
+ }
+ return ret;
+}
+static int gt801_init_panel(struct gt801_ts_data *ts)
+{
+ return 0;
+}
+
+static void gt801_ts_work_func(struct work_struct *work)
+{
+#if SINGLTOUCH_MODE
+
+#else
+ int touch_state_index = 0;
+#endif
+
+ unsigned char start_reg = 0x02;
+ unsigned char buf[TOUCH_NUMBER*TOUCH_REG_NUM];
+ unsigned short x;
+ unsigned short y;
+ int i,ret;
+ int syn_flag = 0;
+ int bufLen = TOUCH_NUMBER*TOUCH_REG_NUM;
+
+ struct gt801_ts_data *ts = container_of(work, struct gt801_ts_data, work);
+
+ gt801printk("%s\n",__FUNCTION__);
+
+ ret=gt801_read_regs(ts->client, start_reg, buf,bufLen);
+ if (ret < 0) {
+ printk("%s:i2c_transfer fail =%d\n",__FUNCTION__,ret);
+ if (ts->use_irq)
+ enable_irq(ts->client->irq);
+
+ return;
+ }
+
+#if SINGLTOUCH_MODE
+ i = 0;
+ if(buf[i+ptpressure] == 0)
+ {
+ gt801printk(" realse ts_dev->point.x=%d ,ts_dev->point.y=%d \n",ts->point.x,ts->point.y);
+
+ if (touch_state[i] == TOUCH_DOWN)
+ {
+ input_report_key(ts->input_dev,BTN_TOUCH,0);
+ syn_flag = 1;
+ touch_state[i] = TOUCH_UP;
+ gt801printk("SINGLTOUCH_MODE up\n");
+ }
+ }
+ else
+ {
+ x = ((( ((unsigned short)buf[i+ptxh] )<< 8) ) | buf[i+ptxl]);
+ y= (((((unsigned short)buf[i+ptyh] )<< 8) )| buf[i+ptyl]);
+
+ if (ts->swap_xy)
+ swap(x, y);
+
+ if (verify_coord(ts,&x,&y))
+ goto out;
+
+ if (touch_state[i] == TOUCH_UP)
+ {
+ gt801printk("SINGLTOUCH_MODE down\n");
+ input_report_key(ts->input_dev,BTN_TOUCH,1);
+ touch_state[i] = TOUCH_DOWN;
+ }
+
+ gt801printk("input_report_abs(%d/%d)\n",x,y);
+ input_report_abs(ts->input_dev,ABS_X,x );
+ input_report_abs(ts->input_dev,ABS_Y,y );
+ syn_flag = 1;
+ }
+
+#else
+
+ for(i=0; i<bufLen; i+=TOUCH_REG_NUM)
+ {
+ if(buf[i+ptpressure] == 0){
+ gt801printk("%s:buf=%d touch up\n",__FUNCTION__,buf[i+ptpressure]);
+ if (touch_state[touch_state_index] == TOUCH_DOWN)
+ {
+ gt801printk("%s:%d touch up\n",__FUNCTION__,i);
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0); //Finger Size
+ input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0); //Touch Size
+ input_mt_sync(ts->input_dev);
+ syn_flag =1;
+ touch_state[touch_state_index] = TOUCH_UP;
+ }
+ }
+ else{
+ x = ((( ((unsigned short)buf[i+ptxh] )<< 8) ) | buf[i+ptxl]);
+ y= (((((unsigned short)buf[i+ptyh] )<< 8) )| buf[i+ptyl]);
+
+ if (ts->swap_xy)
+ swap(x, y);
+
+ if (verify_coord(ts,&x,&y))
+ ;//goto out;
+
+ gt801printk("input_report_abs--%d-%d-(%d/%d)\n", i,touch_state_index, x, y);
+ input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, 1); //Finger Size
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_X, x);
+ input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, y);
+ input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, 5); //Touch Size
+ input_mt_sync(ts->input_dev);
+ syn_flag = 1;
+ touch_state[touch_state_index] = TOUCH_DOWN;
+ }
+
+ touch_state_index++;
+ }
+
+#endif
+
+ if(syn_flag)
+ input_sync(ts->input_dev);
+out:
+ if (ts->use_irq)
+ enable_irq(ts->client->irq);
+
+ return;
+}
+static enum hrtimer_restart gt801_ts_timer_func(struct hrtimer *timer)
+{
+ struct gt801_ts_data *ts = container_of(timer, struct gt801_ts_data, timer);
+ gt801printk("%s\n",__FUNCTION__);
+
+ queue_work(gt801_wq, &ts->work);
+
+ hrtimer_start(&ts->timer, ktime_set(0, 12500000), HRTIMER_MODE_REL);
+ return HRTIMER_NORESTART;
+}
+
+static irqreturn_t gt801_ts_irq_handler(int irq, void *dev_id)
+{
+ struct gt801_ts_data *ts = dev_id;
+ gt801printk("%s=%d,%d\n",__FUNCTION__,ts->client->irq,ts->use_irq);
+
+ //if (ts->use_irq)
+ disable_irq_nosync(ts->client->irq);
+ queue_work(gt801_wq, &ts->work);
+ return IRQ_HANDLED;
+}
+static int __devinit setup_resetPin(struct i2c_client *client, struct gt801_ts_data *ts)
+{
+ struct gt801_platform_data *pdata = client->dev.platform_data;
+ int err;
+
+ ts->gpio_reset = pdata->gpio_reset;
+ ts->gpio_reset_active_low = pdata->gpio_reset_active_low;
+ ts->resetpin_iomux_mode = pdata->resetpin_iomux_mode;
+
+ if(pdata->resetpin_iomux_name != NULL)
+ strcpy(ts->resetpin_iomux_name,pdata->resetpin_iomux_name);
+
+ gt801printk("%s=%d,%s,%d,%d\n",__FUNCTION__,ts->gpio_reset,ts->resetpin_iomux_name,ts->resetpin_iomux_mode,ts->gpio_reset_active_low);
+ if (!gpio_is_valid(ts->gpio_reset)) {
+ dev_err(&client->dev, "no gpio_reset?\n");
+ return -EINVAL;
+ }
+
+ rk29_mux_api_set(ts->resetpin_iomux_name,ts->resetpin_iomux_mode);
+
+ err = gpio_request(ts->gpio_reset, "gt801_resetPin");
+ if (err) {
+ dev_err(&client->dev, "failed to request resetPin GPIO%d\n",
+ ts->gpio_reset);
+ return err;
+ }
+
+ gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
+
+ err = gpio_direction_output(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
+ if (err) {
+ dev_err(&client->dev, "failed to pulldown resetPin GPIO%d,err%d\n",
+ ts->gpio_reset,err);
+ gpio_free(ts->gpio_reset);
+ return err;
+ }
+
+ mdelay(100);
+
+ gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
+
+ mdelay(100);
+
+ return 0;
+}
+static int __devinit setup_pendown(struct i2c_client *client, struct gt801_ts_data *ts)
+{
+ int err;
+ struct gt801_platform_data *pdata = client->dev.platform_data;
+
+ if (!client->irq) {
+ dev_dbg(&client->dev, "no IRQ?\n");
+ return -ENODEV;
+ }
+
+ if (!gpio_is_valid(pdata->gpio_pendown)) {
+ dev_err(&client->dev, "no gpio_pendown?\n");
+ return -EINVAL;
+ }
+
+ ts->gpio_pendown = pdata->gpio_pendown;
+ strcpy(ts->pendown_iomux_name,pdata->pendown_iomux_name);
+ ts->pendown_iomux_mode = pdata->pendown_iomux_mode;
+
+ gt801printk("%s=%d,%s,%d\n",__FUNCTION__,ts->gpio_pendown,ts->pendown_iomux_name,ts->pendown_iomux_mode);
+
+ if (!gpio_is_valid(ts->gpio_pendown)) {
+ dev_err(&client->dev, "no gpio_pendown?\n");
+ return -EINVAL;
+ }
+
+ rk29_mux_api_set(ts->pendown_iomux_name,ts->pendown_iomux_mode);
+ err = gpio_request(ts->gpio_pendown, "gt801_pendown");
+ if (err) {
+ dev_err(&client->dev, "failed to request pendown GPIO%d\n",
+ ts->gpio_pendown);
+ return err;
+ }
+
+ err = gpio_pull_updown(ts->gpio_pendown, GPIOPullUp);
+ if (err) {
+ dev_err(&client->dev, "failed to pullup pendown GPIO%d\n",
+ ts->gpio_pendown);
+ gpio_free(ts->gpio_pendown);
+ return err;
+ }
+ return 0;
+}
+static int gt801_chip_Init(struct i2c_client *client)
+{
+ u8 i,j;
+ int ret=0;
+ u8 start_reg=0x30;
+ u8 buf[GT801_REGS_NUM];
+
+ gt801printk("enter gt801_chip_Init!!!!\n");
+
+ for(j=0;j<2;j++)
+ {
+ ret=gt801_write_regs(client,start_reg, GT801_RegData,GT801_REGS_NUM);
+ if(ret<0)
+ {
+ printk("\n--%s--Set Register values error !!!\n",__FUNCTION__);
+ }
+
+ ret=gt801_read_regs(client, start_reg, buf,GT801_REGS_NUM);
+ if(ret<0)
+ {
+ printk("\n--%s--Read Register values error !!!\n",__FUNCTION__);
+ }
+
+ for(i=0;i<GT801_REGS_NUM-1;i++)
+ {
+ if(buf[i]!=GT801_RegData[i])
+ {
+ printk("!!!!!!!!gt801_chip_Init err may be i2c errorat adress=%x var=%x i=%x\n",0x30+i, buf[i],i);
+ break;
+ }
+ }
+ if(i==GT801_REGS_NUM-1)
+ break;
+ else if(j==1)
+ return -1;
+
+ mdelay(500);
+ }
+ mdelay(100);
+
+ return ret;
+}
+static int gt801_ts_probe(struct i2c_client *client, const struct i2c_device_id *id)
+{
+ struct gt801_ts_data *ts;
+ struct gt801_platform_data *pdata = client->dev.platform_data;
+ int ret = 0;
+
+ gt801printk("%s \n",__FUNCTION__);
+
+ if (!pdata) {
+ dev_err(&client->dev, "empty platform_data\n");
+ goto err_check_functionality_failed;
+ }
+ if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
+ printk(KERN_ERR "gt801_ts_probe: need I2C_FUNC_I2C\n");
+ ret = -ENODEV;
+ goto err_check_functionality_failed;
+ }
+
+ ts = kzalloc(sizeof(*ts), GFP_KERNEL);
+ if (ts == NULL) {
+ ret = -ENOMEM;
+ goto err_alloc_data_failed;
+ }
+ INIT_WORK(&ts->work, gt801_ts_work_func);
+ ts->client = client;
+ i2c_set_clientdata(client, ts);
+
+ ret = setup_resetPin(client,ts);
+ if(ret)
+ {
+ printk("%s:setup_resetPin fail\n",__FUNCTION__);
+ goto err_input_dev_alloc_failed;
+ }
+
+ ret=gt801_chip_Init(ts->client);
+ if(ret<0)
+ {
+ printk("%s:chips init failed\n",__FUNCTION__);
+ goto err_resetpin_failed;
+ }
+
+ /* allocate input device */
+ ts->input_dev = input_allocate_device();
+ if (ts->input_dev == NULL) {
+ ret = -ENOMEM;
+ printk(KERN_ERR "%s: Failed to allocate input device\n",__FUNCTION__);
+ goto err_input_dev_alloc_failed;
+ }
+
+ ts->model = pdata->model ? : 801;
+ ts->swap_xy = pdata->swap_xy;
+ ts->x_min = pdata->x_min;
+ ts->x_max = pdata->x_max;
+ ts->y_min = pdata->y_min;
+ ts->y_max = pdata->y_max;
+ snprintf(ts->phys, sizeof(ts->phys), "%s/input0", dev_name(&client->dev));
+ snprintf(ts->name, sizeof(ts->name), "gt%d-touchscreen", ts->model);
+ ts->input_dev->phys = ts->phys;
+ ts->input_dev->name = ts->name;
+ ts->input_dev->dev.parent = &client->dev;
+
+#if SINGLTOUCH_MODE
+ ts->input_dev->evbit[0] = BIT_MASK(EV_ABS)|BIT_MASK(EV_KEY);
+ ts->input_dev->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+ input_set_abs_params(ts->input_dev,ABS_X,
+ ts->x_min ? : 0,
+ ts->x_max ? : 480,
+ 0, 0);
+ input_set_abs_params(ts->input_dev,ABS_Y,
+ ts->y_min ? : 0,
+ ts->y_max ? : 800,
+ 0, 0);
+
+#else
+ ts->input_dev->evbit[0] = BIT_MASK(EV_SYN) | BIT_MASK(EV_ABS);
+ // ts->input_dev->absbit[0] =
+ // BIT(ABS_MT_POSITION_X) | BIT(ABS_MT_POSITION_Y) |
+ // BIT(ABS_MT_TOUCH_MAJOR) | BIT(ABS_MT_WIDTH_MAJOR); // for android
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X,
+ ts->x_min ? : 0,
+ ts->x_max ? : 480,
+ 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y,
+ ts->y_min ? : 0,
+ ts->y_max ? : 800,
+ 0, 0);
+ input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 1, 0, 0); //Finger Size
+ input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 10, 0, 0); //Touch Size
+#endif
+ ret = input_register_device(ts->input_dev);
+ if (ret) {
+ printk(KERN_ERR "%s: Unable to register %s input device\n", __FUNCTION__,ts->input_dev->name);
+ goto err_input_register_device_failed;
+ }
+
+ client->irq = gpio_to_irq(client->irq);
+ if (client->irq) {
+ ret = setup_pendown(client,ts);
+ if(ret)
+ {
+ printk("%s:setup_pendown fail\n",__FUNCTION__);
+ goto err_input_register_device_failed;
+ }
+
+ ret = request_irq(client->irq, gt801_ts_irq_handler, IRQF_DISABLED | IRQF_TRIGGER_LOW, client->name, ts);
+ if (ret == 0) {
+ gt801printk("%s:register ISR (irq=%d)\n", __FUNCTION__,client->irq);
+ ts->use_irq = 1;
+ }
+ else
+ dev_err(&client->dev, "request_irq failed\n");
+ }
+
+ if (!ts->use_irq) {
+ hrtimer_init(&ts->timer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ ts->timer.function = gt801_ts_timer_func;
+ hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+ }
+#ifdef CONFIG_HAS_EARLYSUSPEND
+ ts->early_suspend.level = EARLY_SUSPEND_LEVEL_BLANK_SCREEN + 1;
+ ts->early_suspend.suspend = gt801_ts_early_suspend;
+ ts->early_suspend.resume = gt801_ts_late_resume;
+ register_early_suspend(&ts->early_suspend);
+#endif
+
+ printk(KERN_INFO "%s: Start touchscreen %s in %s mode\n", __FUNCTION__,ts->input_dev->name, ts->use_irq ? "interrupt" : "polling");
+
+ return 0;
+
+err_input_register_device_failed:
+ input_free_device(ts->input_dev);
+err_resetpin_failed:
+ gpio_free(ts->gpio_reset);
+err_input_dev_alloc_failed:
+ kfree(ts);
+err_alloc_data_failed:
+err_check_functionality_failed:
+
+ return ret;
+}
+
+static int gt801_ts_remove(struct i2c_client *client)
+{
+ struct gt801_ts_data *ts = i2c_get_clientdata(client);
+ unregister_early_suspend(&ts->early_suspend);
+ if (ts->use_irq)
+ free_irq(client->irq, ts);
+ else
+ hrtimer_cancel(&ts->timer);
+ input_unregister_device(ts->input_dev);
+ gpio_free(ts->gpio_pendown);
+ gpio_free(ts->gpio_reset);
+ kfree(ts);
+ return 0;
+}
+
+static int gt801_ts_suspend(struct i2c_client *client, pm_message_t mesg)
+{
+ int ret;
+ struct gt801_ts_data *ts = i2c_get_clientdata(client);
+
+ printk("gt801 TS Suspend\n");
+
+ if (ts->use_irq)
+ disable_irq(client->irq);
+ else
+ hrtimer_cancel(&ts->timer);
+
+ ret = cancel_work_sync(&ts->work);
+ if (ret && ts->use_irq) /* if work was pending disable-count is now 2 */
+ enable_irq(client->irq);
+
+ gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_LOW:GPIO_HIGH);
+
+ return 0;
+}
+
+static int gt801_ts_resume(struct i2c_client *client)
+{
+ struct gt801_ts_data *ts = i2c_get_clientdata(client);
+
+ gt801_init_panel(ts);
+
+ printk("gt801 TS Resume\n");
+
+ gpio_set_value(ts->gpio_reset, ts->gpio_reset_active_low? GPIO_HIGH:GPIO_LOW);
+
+ if (ts->use_irq) {
+ printk("enabling IRQ %d\n", client->irq);
+ enable_irq(client->irq);
+ }
+ else
+ hrtimer_start(&ts->timer, ktime_set(1, 0), HRTIMER_MODE_REL);
+
+ return 0;
+}
+
+#ifdef CONFIG_HAS_EARLYSUSPEND
+static void gt801_ts_early_suspend(struct early_suspend *h)
+{
+ struct gt801_ts_data *ts;
+ ts = container_of(h, struct gt801_ts_data, early_suspend);
+ gt801_ts_suspend(ts->client, PMSG_SUSPEND);
+}
+
+static void gt801_ts_late_resume(struct early_suspend *h)
+{
+ struct gt801_ts_data *ts;
+ ts = container_of(h, struct gt801_ts_data, early_suspend);
+ gt801_ts_resume(ts->client);
+}
+#endif
+
+#define gt801_TS_NAME "gt801_ts"
+
+static const struct i2c_device_id gt801_ts_id[] = {
+ { gt801_TS_NAME, 0 },
+ { }
+};
+
+static struct i2c_driver gt801_ts_driver = {
+ .probe = gt801_ts_probe,
+ .remove = gt801_ts_remove,
+#ifndef CONFIG_HAS_EARLYSUSPEND
+ .suspend = gt801_ts_suspend,
+ .resume = gt801_ts_resume,
+#endif
+ .id_table = gt801_ts_id,
+ .driver = {
+ .name = gt801_TS_NAME,
+ },
+};
+
+static int __devinit gt801_ts_init(void)
+{
+ printk("%s\n",__FUNCTION__);
+ gt801_wq = create_singlethread_workqueue("gt801_wq");
+ if (!gt801_wq)
+ return -ENOMEM;
+ return i2c_add_driver(>801_ts_driver);
+}
+
+static void __exit gt801_ts_exit(void)
+{
+ printk("%s\n",__FUNCTION__);
+ i2c_del_driver(>801_ts_driver);
+ if (gt801_wq)
+ destroy_workqueue(gt801_wq);
+}
+
+module_init(gt801_ts_init);
+module_exit(gt801_ts_exit);
+
+MODULE_DESCRIPTION("gt801 Touchscreen Driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/input/touchscreen/gt801_ts.h b/drivers/input/touchscreen/gt801_ts.h
new file mode 100755
index 000000000000..e41f26ddd32c
--- /dev/null
+++ b/drivers/input/touchscreen/gt801_ts.h
@@ -0,0 +1,45 @@
+/*
+ * drivers/input/touchscreen/gt801_ts.h
+ *
+ * Copyright (C) 2010 ROCKCHIP, Inc.
+ *
+ * This software is licensed under the terms of the GNU General Public
+ * License version 2, as published by the Free Software Foundation, and
+ * may be copied, distributed, and modified under those terms.
+ *
+ * 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.
+ */
+
+#ifndef __DRIVERS_TOUCHSCREEN_GT801_TS_H
+#define __DRIVERS_TOUCHSCREEN_GT801_TS_H
+
+#define IOMUX_NAME_SIZE 48
+
+enum regadd {
+ ptxh = 0, ptxl = 1, ptyh = 2, ptyl = 3, ptpressure = 4,
+};
+enum touchstate {
+ TOUCH_UP = 0, TOUCH_DOWN = 1,
+};
+
+struct gt801_platform_data {
+
+ u16 model; /* 801. */
+ bool swap_xy; /* swap x and y axes */
+ u16 x_min, x_max;
+ u16 y_min, y_max;
+ int gpio_reset;
+ int gpio_reset_active_low;
+ int gpio_pendown; /* the GPIO used to decide the pendown */
+
+ char pendown_iomux_name[IOMUX_NAME_SIZE];
+ char resetpin_iomux_name[IOMUX_NAME_SIZE];
+ int pendown_iomux_mode;
+ int resetpin_iomux_mode;
+
+ int (*get_pendown_state)(void);
+};
+#endif