1acb45439SRussell King /* 25437775eSPavel Machek * Touchscreen driver for UCB1x00-based touchscreens 3acb45439SRussell King * 4acb45439SRussell King * Copyright (C) 2001 Russell King, All Rights Reserved. 55437775eSPavel Machek * Copyright (C) 2005 Pavel Machek 6acb45439SRussell King * 7acb45439SRussell King * This program is free software; you can redistribute it and/or modify 8acb45439SRussell King * it under the terms of the GNU General Public License version 2 as 9acb45439SRussell King * published by the Free Software Foundation. 10acb45439SRussell King * 11acb45439SRussell King * 21-Jan-2002 <jco@ict.es> : 12acb45439SRussell King * 13acb45439SRussell King * Added support for synchronous A/D mode. This mode is useful to 14acb45439SRussell King * avoid noise induced in the touchpanel by the LCD, provided that 15acb45439SRussell King * the UCB1x00 has a valid LCD sync signal routed to its ADCSYNC pin. 16acb45439SRussell King * It is important to note that the signal connected to the ADCSYNC 17acb45439SRussell King * pin should provide pulses even when the LCD is blanked, otherwise 18acb45439SRussell King * a pen touch needed to unblank the LCD will never be read. 19acb45439SRussell King */ 20acb45439SRussell King #include <linux/config.h> 21acb45439SRussell King #include <linux/module.h> 22acb45439SRussell King #include <linux/moduleparam.h> 23acb45439SRussell King #include <linux/init.h> 24acb45439SRussell King #include <linux/smp.h> 25acb45439SRussell King #include <linux/smp_lock.h> 26acb45439SRussell King #include <linux/sched.h> 27acb45439SRussell King #include <linux/completion.h> 28acb45439SRussell King #include <linux/delay.h> 29acb45439SRussell King #include <linux/string.h> 30acb45439SRussell King #include <linux/input.h> 31acb45439SRussell King #include <linux/device.h> 32acb45439SRussell King #include <linux/suspend.h> 33acb45439SRussell King #include <linux/slab.h> 345437775eSPavel Machek #include <linux/kthread.h> 3517532989SPavel Machek #include <linux/delay.h> 36acb45439SRussell King 37acb45439SRussell King #include <asm/dma.h> 38acb45439SRussell King #include <asm/semaphore.h> 3917532989SPavel Machek #include <asm/arch/collie.h> 4017532989SPavel Machek #include <asm/mach-types.h> 41acb45439SRussell King 42acb45439SRussell King #include "ucb1x00.h" 43acb45439SRussell King 44acb45439SRussell King 45acb45439SRussell King struct ucb1x00_ts { 46bd622663SDmitry Torokhov struct input_dev *idev; 47acb45439SRussell King struct ucb1x00 *ucb; 48acb45439SRussell King 49acb45439SRussell King wait_queue_head_t irq_wait; 50acb45439SRussell King struct task_struct *rtask; 51acb45439SRussell King u16 x_res; 52acb45439SRussell King u16 y_res; 53acb45439SRussell King 546b9ea421SRussell King unsigned int restart:1; 556b9ea421SRussell King unsigned int adcsync:1; 56acb45439SRussell King }; 57acb45439SRussell King 58acb45439SRussell King static int adcsync; 59acb45439SRussell King 60acb45439SRussell King static inline void ucb1x00_ts_evt_add(struct ucb1x00_ts *ts, u16 pressure, u16 x, u16 y) 61acb45439SRussell King { 62bd622663SDmitry Torokhov input_report_abs(ts->idev, ABS_X, x); 63bd622663SDmitry Torokhov input_report_abs(ts->idev, ABS_Y, y); 64bd622663SDmitry Torokhov input_report_abs(ts->idev, ABS_PRESSURE, pressure); 65bd622663SDmitry Torokhov input_sync(ts->idev); 66acb45439SRussell King } 67acb45439SRussell King 68acb45439SRussell King static inline void ucb1x00_ts_event_release(struct ucb1x00_ts *ts) 69acb45439SRussell King { 70bd622663SDmitry Torokhov input_report_abs(ts->idev, ABS_PRESSURE, 0); 71bd622663SDmitry Torokhov input_sync(ts->idev); 72acb45439SRussell King } 73acb45439SRussell King 74acb45439SRussell King /* 75acb45439SRussell King * Switch to interrupt mode. 76acb45439SRussell King */ 77acb45439SRussell King static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts) 78acb45439SRussell King { 79acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 80acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 81acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 82acb45439SRussell King UCB_TS_CR_MODE_INT); 83acb45439SRussell King } 84acb45439SRussell King 85acb45439SRussell King /* 86acb45439SRussell King * Switch to pressure mode, and read pressure. We don't need to wait 87acb45439SRussell King * here, since both plates are being driven. 88acb45439SRussell King */ 89acb45439SRussell King static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts) 90acb45439SRussell King { 9117532989SPavel Machek if (machine_is_collie()) { 9217532989SPavel Machek ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); 9317532989SPavel Machek ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 9417532989SPavel Machek UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW | 9517532989SPavel Machek UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 9617532989SPavel Machek 9717532989SPavel Machek udelay(55); 9817532989SPavel Machek 9917532989SPavel Machek return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync); 10017532989SPavel Machek } else { 101acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 102acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 103acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 104acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 105acb45439SRussell King 106acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 107acb45439SRussell King } 10817532989SPavel Machek } 109acb45439SRussell King 110acb45439SRussell King /* 111acb45439SRussell King * Switch to X position mode and measure Y plate. We switch the plate 112acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 113acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 114acb45439SRussell King * for things to stabilise. 115acb45439SRussell King */ 116acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts) 117acb45439SRussell King { 11817532989SPavel Machek if (machine_is_collie()) 11917532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 12017532989SPavel Machek else { 121acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 122acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 123acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 124acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 125acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 126acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 12717532989SPavel Machek } 128acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 129acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 130acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 131acb45439SRussell King 132acb45439SRussell King udelay(55); 133acb45439SRussell King 134acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 135acb45439SRussell King } 136acb45439SRussell King 137acb45439SRussell King /* 138acb45439SRussell King * Switch to Y position mode and measure X plate. We switch the plate 139acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 140acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 141acb45439SRussell King * for things to stabilise. 142acb45439SRussell King */ 143acb45439SRussell King static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts) 144acb45439SRussell King { 14517532989SPavel Machek if (machine_is_collie()) 14617532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 14717532989SPavel Machek else { 148acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 149acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 150acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 151acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 152acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 153acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 15417532989SPavel Machek } 15517532989SPavel Machek 156acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 157acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 158acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 159acb45439SRussell King 160acb45439SRussell King udelay(55); 161acb45439SRussell King 162acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync); 163acb45439SRussell King } 164acb45439SRussell King 165acb45439SRussell King /* 166acb45439SRussell King * Switch to X plate resistance mode. Set MX to ground, PX to 167acb45439SRussell King * supply. Measure current. 168acb45439SRussell King */ 169acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts) 170acb45439SRussell King { 171acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 172acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 173acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 174acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 175acb45439SRussell King } 176acb45439SRussell King 177acb45439SRussell King /* 178acb45439SRussell King * Switch to Y plate resistance mode. Set MY to ground, PY to 179acb45439SRussell King * supply. Measure current. 180acb45439SRussell King */ 181acb45439SRussell King static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts) 182acb45439SRussell King { 183acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 184acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 185acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 186acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 187acb45439SRussell King } 188acb45439SRussell King 18917532989SPavel Machek static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts) 19017532989SPavel Machek { 19117532989SPavel Machek unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR); 19217532989SPavel Machek if (machine_is_collie()) 19317532989SPavel Machek return (!(val & (UCB_TS_CR_TSPX_LOW))); 19417532989SPavel Machek else 19517532989SPavel Machek return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)); 19617532989SPavel Machek } 19717532989SPavel Machek 198acb45439SRussell King /* 199acb45439SRussell King * This is a RT kernel thread that handles the ADC accesses 200acb45439SRussell King * (mainly so we can use semaphores in the UCB1200 core code 201acb45439SRussell King * to serialise accesses to the ADC). 202acb45439SRussell King */ 203acb45439SRussell King static int ucb1x00_thread(void *_ts) 204acb45439SRussell King { 205acb45439SRussell King struct ucb1x00_ts *ts = _ts; 206acb45439SRussell King struct task_struct *tsk = current; 207acb45439SRussell King DECLARE_WAITQUEUE(wait, tsk); 208acb45439SRussell King int valid; 209acb45439SRussell King 210acb45439SRussell King /* 211acb45439SRussell King * We could run as a real-time thread. However, thus far 212acb45439SRussell King * this doesn't seem to be necessary. 213acb45439SRussell King */ 214acb45439SRussell King // tsk->policy = SCHED_FIFO; 215acb45439SRussell King // tsk->rt_priority = 1; 216acb45439SRussell King 217acb45439SRussell King valid = 0; 218acb45439SRussell King 219acb45439SRussell King add_wait_queue(&ts->irq_wait, &wait); 2205437775eSPavel Machek while (!kthread_should_stop()) { 22117532989SPavel Machek unsigned int x, y, p; 222acb45439SRussell King signed long timeout; 223acb45439SRussell King 224acb45439SRussell King ts->restart = 0; 225acb45439SRussell King 226acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 227acb45439SRussell King 228acb45439SRussell King x = ucb1x00_ts_read_xpos(ts); 229acb45439SRussell King y = ucb1x00_ts_read_ypos(ts); 230acb45439SRussell King p = ucb1x00_ts_read_pressure(ts); 231acb45439SRussell King 232acb45439SRussell King /* 233acb45439SRussell King * Switch back to interrupt mode. 234acb45439SRussell King */ 235acb45439SRussell King ucb1x00_ts_mode_int(ts); 236acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 237acb45439SRussell King 2385437775eSPavel Machek msleep(10); 239acb45439SRussell King 240acb45439SRussell King ucb1x00_enable(ts->ucb); 241acb45439SRussell King 24217532989SPavel Machek 24317532989SPavel Machek if (ucb1x00_ts_pen_down(ts)) { 244acb45439SRussell King set_task_state(tsk, TASK_INTERRUPTIBLE); 245acb45439SRussell King 24617532989SPavel Machek ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING); 247acb45439SRussell King ucb1x00_disable(ts->ucb); 248acb45439SRussell King 249acb45439SRussell King /* 250acb45439SRussell King * If we spat out a valid sample set last time, 251acb45439SRussell King * spit out a "pen off" sample here. 252acb45439SRussell King */ 253acb45439SRussell King if (valid) { 254acb45439SRussell King ucb1x00_ts_event_release(ts); 255acb45439SRussell King valid = 0; 256acb45439SRussell King } 257acb45439SRussell King 258acb45439SRussell King timeout = MAX_SCHEDULE_TIMEOUT; 259acb45439SRussell King } else { 260acb45439SRussell King ucb1x00_disable(ts->ucb); 261acb45439SRussell King 262acb45439SRussell King /* 263acb45439SRussell King * Filtering is policy. Policy belongs in user 264acb45439SRussell King * space. We therefore leave it to user space 265acb45439SRussell King * to do any filtering they please. 266acb45439SRussell King */ 267acb45439SRussell King if (!ts->restart) { 268acb45439SRussell King ucb1x00_ts_evt_add(ts, p, x, y); 269acb45439SRussell King valid = 1; 270acb45439SRussell King } 271acb45439SRussell King 272acb45439SRussell King set_task_state(tsk, TASK_INTERRUPTIBLE); 273acb45439SRussell King timeout = HZ / 100; 274acb45439SRussell King } 275acb45439SRussell King 276acb45439SRussell King try_to_freeze(); 277acb45439SRussell King 278acb45439SRussell King schedule_timeout(timeout); 279acb45439SRussell King } 280acb45439SRussell King 281acb45439SRussell King remove_wait_queue(&ts->irq_wait, &wait); 282acb45439SRussell King 283acb45439SRussell King ts->rtask = NULL; 2845437775eSPavel Machek return 0; 285acb45439SRussell King } 286acb45439SRussell King 287acb45439SRussell King /* 288acb45439SRussell King * We only detect touch screen _touches_ with this interrupt 289acb45439SRussell King * handler, and even then we just schedule our task. 290acb45439SRussell King */ 291acb45439SRussell King static void ucb1x00_ts_irq(int idx, void *id) 292acb45439SRussell King { 293acb45439SRussell King struct ucb1x00_ts *ts = id; 294acb45439SRussell King ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); 295acb45439SRussell King wake_up(&ts->irq_wait); 296acb45439SRussell King } 297acb45439SRussell King 298acb45439SRussell King static int ucb1x00_ts_open(struct input_dev *idev) 299acb45439SRussell King { 300acb45439SRussell King struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev; 301acb45439SRussell King int ret = 0; 302acb45439SRussell King 3035437775eSPavel Machek BUG_ON(ts->rtask); 304acb45439SRussell King 305acb45439SRussell King init_waitqueue_head(&ts->irq_wait); 306acb45439SRussell King ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts); 307acb45439SRussell King if (ret < 0) 308acb45439SRussell King goto out; 309acb45439SRussell King 310acb45439SRussell King /* 311acb45439SRussell King * If we do this at all, we should allow the user to 312acb45439SRussell King * measure and read the X and Y resistance at any time. 313acb45439SRussell King */ 314acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 315acb45439SRussell King ts->x_res = ucb1x00_ts_read_xres(ts); 316acb45439SRussell King ts->y_res = ucb1x00_ts_read_yres(ts); 317acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 318acb45439SRussell King 3195437775eSPavel Machek ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd"); 3205437775eSPavel Machek if (!IS_ERR(ts->rtask)) { 321acb45439SRussell King ret = 0; 322acb45439SRussell King } else { 323acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 3245437775eSPavel Machek ts->rtask = NULL; 3255437775eSPavel Machek ret = -EFAULT; 326acb45439SRussell King } 327acb45439SRussell King 328acb45439SRussell King out: 329acb45439SRussell King return ret; 330acb45439SRussell King } 331acb45439SRussell King 332acb45439SRussell King /* 333acb45439SRussell King * Release touchscreen resources. Disable IRQs. 334acb45439SRussell King */ 335acb45439SRussell King static void ucb1x00_ts_close(struct input_dev *idev) 336acb45439SRussell King { 337acb45439SRussell King struct ucb1x00_ts *ts = (struct ucb1x00_ts *)idev; 338acb45439SRussell King 3395437775eSPavel Machek if (ts->rtask) 3405437775eSPavel Machek kthread_stop(ts->rtask); 341acb45439SRussell King 342acb45439SRussell King ucb1x00_enable(ts->ucb); 343acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 344acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0); 345acb45439SRussell King ucb1x00_disable(ts->ucb); 346acb45439SRussell King } 347acb45439SRussell King 348acb45439SRussell King #ifdef CONFIG_PM 349acb45439SRussell King static int ucb1x00_ts_resume(struct ucb1x00_dev *dev) 350acb45439SRussell King { 351acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 352acb45439SRussell King 353acb45439SRussell King if (ts->rtask != NULL) { 354acb45439SRussell King /* 355acb45439SRussell King * Restart the TS thread to ensure the 356acb45439SRussell King * TS interrupt mode is set up again 357acb45439SRussell King * after sleep. 358acb45439SRussell King */ 359acb45439SRussell King ts->restart = 1; 360acb45439SRussell King wake_up(&ts->irq_wait); 361acb45439SRussell King } 362acb45439SRussell King return 0; 363acb45439SRussell King } 364acb45439SRussell King #else 365acb45439SRussell King #define ucb1x00_ts_resume NULL 366acb45439SRussell King #endif 367acb45439SRussell King 368acb45439SRussell King 369acb45439SRussell King /* 370acb45439SRussell King * Initialisation. 371acb45439SRussell King */ 372acb45439SRussell King static int ucb1x00_ts_add(struct ucb1x00_dev *dev) 373acb45439SRussell King { 374acb45439SRussell King struct ucb1x00_ts *ts; 375acb45439SRussell King 376bd622663SDmitry Torokhov ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL); 377acb45439SRussell King if (!ts) 378acb45439SRussell King return -ENOMEM; 379acb45439SRussell King 380bd622663SDmitry Torokhov ts->idev = input_allocate_device(); 381bd622663SDmitry Torokhov if (!ts->idev) { 382bd622663SDmitry Torokhov kfree(ts); 383bd622663SDmitry Torokhov return -ENOMEM; 384bd622663SDmitry Torokhov } 385acb45439SRussell King 386acb45439SRussell King ts->ucb = dev->ucb; 387acb45439SRussell King ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC; 388acb45439SRussell King 389bd622663SDmitry Torokhov ts->idev->name = "Touchscreen panel"; 390bd622663SDmitry Torokhov ts->idev->id.product = ts->ucb->id; 391bd622663SDmitry Torokhov ts->idev->open = ucb1x00_ts_open; 392bd622663SDmitry Torokhov ts->idev->close = ucb1x00_ts_close; 393acb45439SRussell King 394bd622663SDmitry Torokhov __set_bit(EV_ABS, ts->idev->evbit); 395bd622663SDmitry Torokhov __set_bit(ABS_X, ts->idev->absbit); 396bd622663SDmitry Torokhov __set_bit(ABS_Y, ts->idev->absbit); 397bd622663SDmitry Torokhov __set_bit(ABS_PRESSURE, ts->idev->absbit); 398acb45439SRussell King 399bd622663SDmitry Torokhov input_register_device(ts->idev); 400acb45439SRussell King 401acb45439SRussell King dev->priv = ts; 402acb45439SRussell King 403acb45439SRussell King return 0; 404acb45439SRussell King } 405acb45439SRussell King 406acb45439SRussell King static void ucb1x00_ts_remove(struct ucb1x00_dev *dev) 407acb45439SRussell King { 408acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 409bd622663SDmitry Torokhov 410bd622663SDmitry Torokhov input_unregister_device(ts->idev); 411acb45439SRussell King kfree(ts); 412acb45439SRussell King } 413acb45439SRussell King 414acb45439SRussell King static struct ucb1x00_driver ucb1x00_ts_driver = { 415acb45439SRussell King .add = ucb1x00_ts_add, 416acb45439SRussell King .remove = ucb1x00_ts_remove, 417acb45439SRussell King .resume = ucb1x00_ts_resume, 418acb45439SRussell King }; 419acb45439SRussell King 420acb45439SRussell King static int __init ucb1x00_ts_init(void) 421acb45439SRussell King { 422acb45439SRussell King return ucb1x00_register_driver(&ucb1x00_ts_driver); 423acb45439SRussell King } 424acb45439SRussell King 425acb45439SRussell King static void __exit ucb1x00_ts_exit(void) 426acb45439SRussell King { 427acb45439SRussell King ucb1x00_unregister_driver(&ucb1x00_ts_driver); 428acb45439SRussell King } 429acb45439SRussell King 430acb45439SRussell King module_param(adcsync, int, 0444); 431acb45439SRussell King module_init(ucb1x00_ts_init); 432acb45439SRussell King module_exit(ucb1x00_ts_exit); 433acb45439SRussell King 434acb45439SRussell King MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 435acb45439SRussell King MODULE_DESCRIPTION("UCB1x00 touchscreen driver"); 436acb45439SRussell King MODULE_LICENSE("GPL"); 437