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 { 621393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 631393c3edSNicolas Pitre input_report_abs(idev, ABS_X, x); 641393c3edSNicolas Pitre input_report_abs(idev, ABS_Y, y); 651393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, pressure); 661393c3edSNicolas Pitre input_sync(idev); 67acb45439SRussell King } 68acb45439SRussell King 69acb45439SRussell King static inline void ucb1x00_ts_event_release(struct ucb1x00_ts *ts) 70acb45439SRussell King { 711393c3edSNicolas Pitre struct input_dev *idev = ts->idev; 721393c3edSNicolas Pitre input_report_abs(idev, ABS_PRESSURE, 0); 731393c3edSNicolas Pitre input_sync(idev); 74acb45439SRussell King } 75acb45439SRussell King 76acb45439SRussell King /* 77acb45439SRussell King * Switch to interrupt mode. 78acb45439SRussell King */ 79acb45439SRussell King static inline void ucb1x00_ts_mode_int(struct ucb1x00_ts *ts) 80acb45439SRussell King { 81acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 82acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 83acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 84acb45439SRussell King UCB_TS_CR_MODE_INT); 85acb45439SRussell King } 86acb45439SRussell King 87acb45439SRussell King /* 88acb45439SRussell King * Switch to pressure mode, and read pressure. We don't need to wait 89acb45439SRussell King * here, since both plates are being driven. 90acb45439SRussell King */ 91acb45439SRussell King static inline unsigned int ucb1x00_ts_read_pressure(struct ucb1x00_ts *ts) 92acb45439SRussell King { 9317532989SPavel Machek if (machine_is_collie()) { 9417532989SPavel Machek ucb1x00_io_write(ts->ucb, COLLIE_TC35143_GPIO_TBL_CHK, 0); 9517532989SPavel Machek ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 9617532989SPavel Machek UCB_TS_CR_TSPX_POW | UCB_TS_CR_TSMX_POW | 9717532989SPavel Machek UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 9817532989SPavel Machek 9917532989SPavel Machek udelay(55); 10017532989SPavel Machek 10117532989SPavel Machek return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_AD2, ts->adcsync); 10217532989SPavel Machek } else { 103acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 104acb45439SRussell King UCB_TS_CR_TSMX_POW | UCB_TS_CR_TSPX_POW | 105acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_GND | 106acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 107acb45439SRussell King 108acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 109acb45439SRussell King } 11017532989SPavel Machek } 111acb45439SRussell King 112acb45439SRussell King /* 113acb45439SRussell King * Switch to X position mode and measure Y plate. We switch the plate 114acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 115acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 116acb45439SRussell King * for things to stabilise. 117acb45439SRussell King */ 118acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xpos(struct ucb1x00_ts *ts) 119acb45439SRussell King { 12017532989SPavel Machek if (machine_is_collie()) 12117532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 12217532989SPavel Machek else { 123acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 124acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 125acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 126acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 127acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 128acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 12917532989SPavel Machek } 130acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 131acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 132acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 133acb45439SRussell King 134acb45439SRussell King udelay(55); 135acb45439SRussell King 136acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPY, ts->adcsync); 137acb45439SRussell King } 138acb45439SRussell King 139acb45439SRussell King /* 140acb45439SRussell King * Switch to Y position mode and measure X plate. We switch the plate 141acb45439SRussell King * configuration in pressure mode, then switch to position mode. This 142acb45439SRussell King * gives a faster response time. Even so, we need to wait about 55us 143acb45439SRussell King * for things to stabilise. 144acb45439SRussell King */ 145acb45439SRussell King static inline unsigned int ucb1x00_ts_read_ypos(struct ucb1x00_ts *ts) 146acb45439SRussell King { 14717532989SPavel Machek if (machine_is_collie()) 14817532989SPavel Machek ucb1x00_io_write(ts->ucb, 0, COLLIE_TC35143_GPIO_TBL_CHK); 14917532989SPavel Machek else { 150acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 151acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 152acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 153acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 154acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 155acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 15617532989SPavel Machek } 15717532989SPavel Machek 158acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 159acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 160acb45439SRussell King UCB_TS_CR_MODE_POS | UCB_TS_CR_BIAS_ENA); 161acb45439SRussell King 162acb45439SRussell King udelay(55); 163acb45439SRussell King 164acb45439SRussell King return ucb1x00_adc_read(ts->ucb, UCB_ADC_INP_TSPX, ts->adcsync); 165acb45439SRussell King } 166acb45439SRussell King 167acb45439SRussell King /* 168acb45439SRussell King * Switch to X plate resistance mode. Set MX to ground, PX to 169acb45439SRussell King * supply. Measure current. 170acb45439SRussell King */ 171acb45439SRussell King static inline unsigned int ucb1x00_ts_read_xres(struct ucb1x00_ts *ts) 172acb45439SRussell King { 173acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 174acb45439SRussell King UCB_TS_CR_TSMX_GND | UCB_TS_CR_TSPX_POW | 175acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 176acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 177acb45439SRussell King } 178acb45439SRussell King 179acb45439SRussell King /* 180acb45439SRussell King * Switch to Y plate resistance mode. Set MY to ground, PY to 181acb45439SRussell King * supply. Measure current. 182acb45439SRussell King */ 183acb45439SRussell King static inline unsigned int ucb1x00_ts_read_yres(struct ucb1x00_ts *ts) 184acb45439SRussell King { 185acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 186acb45439SRussell King UCB_TS_CR_TSMY_GND | UCB_TS_CR_TSPY_POW | 187acb45439SRussell King UCB_TS_CR_MODE_PRES | UCB_TS_CR_BIAS_ENA); 188acb45439SRussell King return ucb1x00_adc_read(ts->ucb, 0, ts->adcsync); 189acb45439SRussell King } 190acb45439SRussell King 19117532989SPavel Machek static inline int ucb1x00_ts_pen_down(struct ucb1x00_ts *ts) 19217532989SPavel Machek { 19317532989SPavel Machek unsigned int val = ucb1x00_reg_read(ts->ucb, UCB_TS_CR); 19417532989SPavel Machek if (machine_is_collie()) 19517532989SPavel Machek return (!(val & (UCB_TS_CR_TSPX_LOW))); 19617532989SPavel Machek else 19717532989SPavel Machek return (val & (UCB_TS_CR_TSPX_LOW | UCB_TS_CR_TSMX_LOW)); 19817532989SPavel Machek } 19917532989SPavel Machek 200acb45439SRussell King /* 201acb45439SRussell King * This is a RT kernel thread that handles the ADC accesses 202acb45439SRussell King * (mainly so we can use semaphores in the UCB1200 core code 203acb45439SRussell King * to serialise accesses to the ADC). 204acb45439SRussell King */ 205acb45439SRussell King static int ucb1x00_thread(void *_ts) 206acb45439SRussell King { 207acb45439SRussell King struct ucb1x00_ts *ts = _ts; 208acb45439SRussell King struct task_struct *tsk = current; 209acb45439SRussell King DECLARE_WAITQUEUE(wait, tsk); 210acb45439SRussell King int valid; 211acb45439SRussell King 212acb45439SRussell King /* 213acb45439SRussell King * We could run as a real-time thread. However, thus far 214acb45439SRussell King * this doesn't seem to be necessary. 215acb45439SRussell King */ 216acb45439SRussell King // tsk->policy = SCHED_FIFO; 217acb45439SRussell King // tsk->rt_priority = 1; 218acb45439SRussell King 219acb45439SRussell King valid = 0; 220acb45439SRussell King 221acb45439SRussell King add_wait_queue(&ts->irq_wait, &wait); 2225437775eSPavel Machek while (!kthread_should_stop()) { 22317532989SPavel Machek unsigned int x, y, p; 224acb45439SRussell King signed long timeout; 225acb45439SRussell King 226acb45439SRussell King ts->restart = 0; 227acb45439SRussell King 228acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 229acb45439SRussell King 230acb45439SRussell King x = ucb1x00_ts_read_xpos(ts); 231acb45439SRussell King y = ucb1x00_ts_read_ypos(ts); 232acb45439SRussell King p = ucb1x00_ts_read_pressure(ts); 233acb45439SRussell King 234acb45439SRussell King /* 235acb45439SRussell King * Switch back to interrupt mode. 236acb45439SRussell King */ 237acb45439SRussell King ucb1x00_ts_mode_int(ts); 238acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 239acb45439SRussell King 2405437775eSPavel Machek msleep(10); 241acb45439SRussell King 242acb45439SRussell King ucb1x00_enable(ts->ucb); 243acb45439SRussell King 24417532989SPavel Machek 24517532989SPavel Machek if (ucb1x00_ts_pen_down(ts)) { 246acb45439SRussell King set_task_state(tsk, TASK_INTERRUPTIBLE); 247acb45439SRussell King 24817532989SPavel Machek ucb1x00_enable_irq(ts->ucb, UCB_IRQ_TSPX, machine_is_collie() ? UCB_RISING : UCB_FALLING); 249acb45439SRussell King ucb1x00_disable(ts->ucb); 250acb45439SRussell King 251acb45439SRussell King /* 252acb45439SRussell King * If we spat out a valid sample set last time, 253acb45439SRussell King * spit out a "pen off" sample here. 254acb45439SRussell King */ 255acb45439SRussell King if (valid) { 256acb45439SRussell King ucb1x00_ts_event_release(ts); 257acb45439SRussell King valid = 0; 258acb45439SRussell King } 259acb45439SRussell King 260acb45439SRussell King timeout = MAX_SCHEDULE_TIMEOUT; 261acb45439SRussell King } else { 262acb45439SRussell King ucb1x00_disable(ts->ucb); 263acb45439SRussell King 264acb45439SRussell King /* 265acb45439SRussell King * Filtering is policy. Policy belongs in user 266acb45439SRussell King * space. We therefore leave it to user space 267acb45439SRussell King * to do any filtering they please. 268acb45439SRussell King */ 269acb45439SRussell King if (!ts->restart) { 270acb45439SRussell King ucb1x00_ts_evt_add(ts, p, x, y); 271acb45439SRussell King valid = 1; 272acb45439SRussell King } 273acb45439SRussell King 274acb45439SRussell King set_task_state(tsk, TASK_INTERRUPTIBLE); 275acb45439SRussell King timeout = HZ / 100; 276acb45439SRussell King } 277acb45439SRussell King 278acb45439SRussell King try_to_freeze(); 279acb45439SRussell King 280acb45439SRussell King schedule_timeout(timeout); 281acb45439SRussell King } 282acb45439SRussell King 283acb45439SRussell King remove_wait_queue(&ts->irq_wait, &wait); 284acb45439SRussell King 285acb45439SRussell King ts->rtask = NULL; 2865437775eSPavel Machek return 0; 287acb45439SRussell King } 288acb45439SRussell King 289acb45439SRussell King /* 290acb45439SRussell King * We only detect touch screen _touches_ with this interrupt 291acb45439SRussell King * handler, and even then we just schedule our task. 292acb45439SRussell King */ 293acb45439SRussell King static void ucb1x00_ts_irq(int idx, void *id) 294acb45439SRussell King { 295acb45439SRussell King struct ucb1x00_ts *ts = id; 296acb45439SRussell King ucb1x00_disable_irq(ts->ucb, UCB_IRQ_TSPX, UCB_FALLING); 297acb45439SRussell King wake_up(&ts->irq_wait); 298acb45439SRussell King } 299acb45439SRussell King 300acb45439SRussell King static int ucb1x00_ts_open(struct input_dev *idev) 301acb45439SRussell King { 3021393c3edSNicolas Pitre struct ucb1x00_ts *ts = idev->private; 303acb45439SRussell King int ret = 0; 304acb45439SRussell King 3055437775eSPavel Machek BUG_ON(ts->rtask); 306acb45439SRussell King 307acb45439SRussell King init_waitqueue_head(&ts->irq_wait); 308acb45439SRussell King ret = ucb1x00_hook_irq(ts->ucb, UCB_IRQ_TSPX, ucb1x00_ts_irq, ts); 309acb45439SRussell King if (ret < 0) 310acb45439SRussell King goto out; 311acb45439SRussell King 312acb45439SRussell King /* 313acb45439SRussell King * If we do this at all, we should allow the user to 314acb45439SRussell King * measure and read the X and Y resistance at any time. 315acb45439SRussell King */ 316acb45439SRussell King ucb1x00_adc_enable(ts->ucb); 317acb45439SRussell King ts->x_res = ucb1x00_ts_read_xres(ts); 318acb45439SRussell King ts->y_res = ucb1x00_ts_read_yres(ts); 319acb45439SRussell King ucb1x00_adc_disable(ts->ucb); 320acb45439SRussell King 3215437775eSPavel Machek ts->rtask = kthread_run(ucb1x00_thread, ts, "ktsd"); 3225437775eSPavel Machek if (!IS_ERR(ts->rtask)) { 323acb45439SRussell King ret = 0; 324acb45439SRussell King } else { 325acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 3265437775eSPavel Machek ts->rtask = NULL; 3275437775eSPavel Machek ret = -EFAULT; 328acb45439SRussell King } 329acb45439SRussell King 330acb45439SRussell King out: 331acb45439SRussell King return ret; 332acb45439SRussell King } 333acb45439SRussell King 334acb45439SRussell King /* 335acb45439SRussell King * Release touchscreen resources. Disable IRQs. 336acb45439SRussell King */ 337acb45439SRussell King static void ucb1x00_ts_close(struct input_dev *idev) 338acb45439SRussell King { 3391393c3edSNicolas Pitre struct ucb1x00_ts *ts = idev->private; 340acb45439SRussell King 3415437775eSPavel Machek if (ts->rtask) 3425437775eSPavel Machek kthread_stop(ts->rtask); 343acb45439SRussell King 344acb45439SRussell King ucb1x00_enable(ts->ucb); 345acb45439SRussell King ucb1x00_free_irq(ts->ucb, UCB_IRQ_TSPX, ts); 346acb45439SRussell King ucb1x00_reg_write(ts->ucb, UCB_TS_CR, 0); 347acb45439SRussell King ucb1x00_disable(ts->ucb); 348acb45439SRussell King } 349acb45439SRussell King 350acb45439SRussell King #ifdef CONFIG_PM 351acb45439SRussell King static int ucb1x00_ts_resume(struct ucb1x00_dev *dev) 352acb45439SRussell King { 353acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 354acb45439SRussell King 355acb45439SRussell King if (ts->rtask != NULL) { 356acb45439SRussell King /* 357acb45439SRussell King * Restart the TS thread to ensure the 358acb45439SRussell King * TS interrupt mode is set up again 359acb45439SRussell King * after sleep. 360acb45439SRussell King */ 361acb45439SRussell King ts->restart = 1; 362acb45439SRussell King wake_up(&ts->irq_wait); 363acb45439SRussell King } 364acb45439SRussell King return 0; 365acb45439SRussell King } 366acb45439SRussell King #else 367acb45439SRussell King #define ucb1x00_ts_resume NULL 368acb45439SRussell King #endif 369acb45439SRussell King 370acb45439SRussell King 371acb45439SRussell King /* 372acb45439SRussell King * Initialisation. 373acb45439SRussell King */ 374acb45439SRussell King static int ucb1x00_ts_add(struct ucb1x00_dev *dev) 375acb45439SRussell King { 376acb45439SRussell King struct ucb1x00_ts *ts; 377acb45439SRussell King 378bd622663SDmitry Torokhov ts = kzalloc(sizeof(struct ucb1x00_ts), GFP_KERNEL); 379acb45439SRussell King if (!ts) 380acb45439SRussell King return -ENOMEM; 381acb45439SRussell King 382bd622663SDmitry Torokhov ts->idev = input_allocate_device(); 383bd622663SDmitry Torokhov if (!ts->idev) { 384bd622663SDmitry Torokhov kfree(ts); 385bd622663SDmitry Torokhov return -ENOMEM; 386bd622663SDmitry Torokhov } 387acb45439SRussell King 388acb45439SRussell King ts->ucb = dev->ucb; 389acb45439SRussell King ts->adcsync = adcsync ? UCB_SYNC : UCB_NOSYNC; 390acb45439SRussell King 3911393c3edSNicolas Pitre ts->idev->private = ts; 392bd622663SDmitry Torokhov ts->idev->name = "Touchscreen panel"; 393bd622663SDmitry Torokhov ts->idev->id.product = ts->ucb->id; 394bd622663SDmitry Torokhov ts->idev->open = ucb1x00_ts_open; 395bd622663SDmitry Torokhov ts->idev->close = ucb1x00_ts_close; 396acb45439SRussell King 397bd622663SDmitry Torokhov __set_bit(EV_ABS, ts->idev->evbit); 398bd622663SDmitry Torokhov __set_bit(ABS_X, ts->idev->absbit); 399bd622663SDmitry Torokhov __set_bit(ABS_Y, ts->idev->absbit); 400bd622663SDmitry Torokhov __set_bit(ABS_PRESSURE, ts->idev->absbit); 401acb45439SRussell King 402bd622663SDmitry Torokhov input_register_device(ts->idev); 403acb45439SRussell King 404acb45439SRussell King dev->priv = ts; 405acb45439SRussell King 406acb45439SRussell King return 0; 407acb45439SRussell King } 408acb45439SRussell King 409acb45439SRussell King static void ucb1x00_ts_remove(struct ucb1x00_dev *dev) 410acb45439SRussell King { 411acb45439SRussell King struct ucb1x00_ts *ts = dev->priv; 412bd622663SDmitry Torokhov 413bd622663SDmitry Torokhov input_unregister_device(ts->idev); 414acb45439SRussell King kfree(ts); 415acb45439SRussell King } 416acb45439SRussell King 417acb45439SRussell King static struct ucb1x00_driver ucb1x00_ts_driver = { 418acb45439SRussell King .add = ucb1x00_ts_add, 419acb45439SRussell King .remove = ucb1x00_ts_remove, 420acb45439SRussell King .resume = ucb1x00_ts_resume, 421acb45439SRussell King }; 422acb45439SRussell King 423acb45439SRussell King static int __init ucb1x00_ts_init(void) 424acb45439SRussell King { 425acb45439SRussell King return ucb1x00_register_driver(&ucb1x00_ts_driver); 426acb45439SRussell King } 427acb45439SRussell King 428acb45439SRussell King static void __exit ucb1x00_ts_exit(void) 429acb45439SRussell King { 430acb45439SRussell King ucb1x00_unregister_driver(&ucb1x00_ts_driver); 431acb45439SRussell King } 432acb45439SRussell King 433acb45439SRussell King module_param(adcsync, int, 0444); 434acb45439SRussell King module_init(ucb1x00_ts_init); 435acb45439SRussell King module_exit(ucb1x00_ts_exit); 436acb45439SRussell King 437acb45439SRussell King MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); 438acb45439SRussell King MODULE_DESCRIPTION("UCB1x00 touchscreen driver"); 439acb45439SRussell King MODULE_LICENSE("GPL"); 440