1*9bcc00b9SEric Miao /* 2*9bcc00b9SEric Miao * Touchscreen driver for Dialog Semiconductor DA9034 3*9bcc00b9SEric Miao * 4*9bcc00b9SEric Miao * Copyright (C) 2006-2008 Marvell International Ltd. 5*9bcc00b9SEric Miao * Fengwei Yin <fengwei.yin@marvell.com> 6*9bcc00b9SEric Miao * Eric Miao <eric.miao@marvell.com> 7*9bcc00b9SEric Miao * 8*9bcc00b9SEric Miao * This program is free software; you can redistribute it and/or modify 9*9bcc00b9SEric Miao * it under the terms of the GNU General Public License version 2 as 10*9bcc00b9SEric Miao * published by the Free Software Foundation. 11*9bcc00b9SEric Miao */ 12*9bcc00b9SEric Miao 13*9bcc00b9SEric Miao #include <linux/module.h> 14*9bcc00b9SEric Miao #include <linux/kernel.h> 15*9bcc00b9SEric Miao #include <linux/init.h> 16*9bcc00b9SEric Miao #include <linux/delay.h> 17*9bcc00b9SEric Miao #include <linux/platform_device.h> 18*9bcc00b9SEric Miao #include <linux/input.h> 19*9bcc00b9SEric Miao #include <linux/mfd/da903x.h> 20*9bcc00b9SEric Miao 21*9bcc00b9SEric Miao #define DA9034_MANUAL_CTRL 0x50 22*9bcc00b9SEric Miao #define DA9034_LDO_ADC_EN (1 << 4) 23*9bcc00b9SEric Miao 24*9bcc00b9SEric Miao #define DA9034_AUTO_CTRL1 0x51 25*9bcc00b9SEric Miao 26*9bcc00b9SEric Miao #define DA9034_AUTO_CTRL2 0x52 27*9bcc00b9SEric Miao #define DA9034_AUTO_TSI_EN (1 << 3) 28*9bcc00b9SEric Miao #define DA9034_PEN_DETECT (1 << 4) 29*9bcc00b9SEric Miao 30*9bcc00b9SEric Miao #define DA9034_TSI_CTRL1 0x53 31*9bcc00b9SEric Miao #define DA9034_TSI_CTRL2 0x54 32*9bcc00b9SEric Miao #define DA9034_TSI_X_MSB 0x6c 33*9bcc00b9SEric Miao #define DA9034_TSI_Y_MSB 0x6d 34*9bcc00b9SEric Miao #define DA9034_TSI_XY_LSB 0x6e 35*9bcc00b9SEric Miao 36*9bcc00b9SEric Miao enum { 37*9bcc00b9SEric Miao STATE_IDLE, /* wait for pendown */ 38*9bcc00b9SEric Miao STATE_BUSY, /* TSI busy sampling */ 39*9bcc00b9SEric Miao STATE_STOP, /* sample available */ 40*9bcc00b9SEric Miao STATE_WAIT, /* Wait to start next sample */ 41*9bcc00b9SEric Miao }; 42*9bcc00b9SEric Miao 43*9bcc00b9SEric Miao enum { 44*9bcc00b9SEric Miao EVENT_PEN_DOWN, 45*9bcc00b9SEric Miao EVENT_PEN_UP, 46*9bcc00b9SEric Miao EVENT_TSI_READY, 47*9bcc00b9SEric Miao EVENT_TIMEDOUT, 48*9bcc00b9SEric Miao }; 49*9bcc00b9SEric Miao 50*9bcc00b9SEric Miao struct da9034_touch { 51*9bcc00b9SEric Miao struct device *da9034_dev; 52*9bcc00b9SEric Miao struct input_dev *input_dev; 53*9bcc00b9SEric Miao 54*9bcc00b9SEric Miao struct delayed_work tsi_work; 55*9bcc00b9SEric Miao struct notifier_block notifier; 56*9bcc00b9SEric Miao 57*9bcc00b9SEric Miao int state; 58*9bcc00b9SEric Miao 59*9bcc00b9SEric Miao int interval_ms; 60*9bcc00b9SEric Miao int x_inverted; 61*9bcc00b9SEric Miao int y_inverted; 62*9bcc00b9SEric Miao 63*9bcc00b9SEric Miao int last_x; 64*9bcc00b9SEric Miao int last_y; 65*9bcc00b9SEric Miao }; 66*9bcc00b9SEric Miao 67*9bcc00b9SEric Miao static inline int is_pen_down(struct da9034_touch *touch) 68*9bcc00b9SEric Miao { 69*9bcc00b9SEric Miao return da903x_query_status(touch->da9034_dev, DA9034_STATUS_PEN_DOWN); 70*9bcc00b9SEric Miao } 71*9bcc00b9SEric Miao 72*9bcc00b9SEric Miao static inline int detect_pen_down(struct da9034_touch *touch, int on) 73*9bcc00b9SEric Miao { 74*9bcc00b9SEric Miao if (on) 75*9bcc00b9SEric Miao return da903x_set_bits(touch->da9034_dev, 76*9bcc00b9SEric Miao DA9034_AUTO_CTRL2, DA9034_PEN_DETECT); 77*9bcc00b9SEric Miao else 78*9bcc00b9SEric Miao return da903x_clr_bits(touch->da9034_dev, 79*9bcc00b9SEric Miao DA9034_AUTO_CTRL2, DA9034_PEN_DETECT); 80*9bcc00b9SEric Miao } 81*9bcc00b9SEric Miao 82*9bcc00b9SEric Miao static int read_tsi(struct da9034_touch *touch) 83*9bcc00b9SEric Miao { 84*9bcc00b9SEric Miao uint8_t _x, _y, _v; 85*9bcc00b9SEric Miao int ret; 86*9bcc00b9SEric Miao 87*9bcc00b9SEric Miao ret = da903x_read(touch->da9034_dev, DA9034_TSI_X_MSB, &_x); 88*9bcc00b9SEric Miao if (ret) 89*9bcc00b9SEric Miao return ret; 90*9bcc00b9SEric Miao 91*9bcc00b9SEric Miao ret = da903x_read(touch->da9034_dev, DA9034_TSI_Y_MSB, &_y); 92*9bcc00b9SEric Miao if (ret) 93*9bcc00b9SEric Miao return ret; 94*9bcc00b9SEric Miao 95*9bcc00b9SEric Miao ret = da903x_read(touch->da9034_dev, DA9034_TSI_XY_LSB, &_v); 96*9bcc00b9SEric Miao if (ret) 97*9bcc00b9SEric Miao return ret; 98*9bcc00b9SEric Miao 99*9bcc00b9SEric Miao touch->last_x = ((_x << 2) & 0x3fc) | (_v & 0x3); 100*9bcc00b9SEric Miao touch->last_y = ((_y << 2) & 0x3fc) | ((_v & 0xc) >> 2); 101*9bcc00b9SEric Miao 102*9bcc00b9SEric Miao return 0; 103*9bcc00b9SEric Miao } 104*9bcc00b9SEric Miao 105*9bcc00b9SEric Miao static inline int start_tsi(struct da9034_touch *touch) 106*9bcc00b9SEric Miao { 107*9bcc00b9SEric Miao return da903x_set_bits(touch->da9034_dev, 108*9bcc00b9SEric Miao DA9034_AUTO_CTRL2, DA9034_AUTO_TSI_EN); 109*9bcc00b9SEric Miao } 110*9bcc00b9SEric Miao 111*9bcc00b9SEric Miao static inline int stop_tsi(struct da9034_touch *touch) 112*9bcc00b9SEric Miao { 113*9bcc00b9SEric Miao return da903x_clr_bits(touch->da9034_dev, 114*9bcc00b9SEric Miao DA9034_AUTO_CTRL2, DA9034_AUTO_TSI_EN); 115*9bcc00b9SEric Miao } 116*9bcc00b9SEric Miao 117*9bcc00b9SEric Miao static inline void report_pen_down(struct da9034_touch *touch) 118*9bcc00b9SEric Miao { 119*9bcc00b9SEric Miao int x = touch->last_x; 120*9bcc00b9SEric Miao int y = touch->last_y; 121*9bcc00b9SEric Miao 122*9bcc00b9SEric Miao x &= 0xfff; 123*9bcc00b9SEric Miao if (touch->x_inverted) 124*9bcc00b9SEric Miao x = 1024 - x; 125*9bcc00b9SEric Miao y &= 0xfff; 126*9bcc00b9SEric Miao if (touch->y_inverted) 127*9bcc00b9SEric Miao y = 1024 - y; 128*9bcc00b9SEric Miao 129*9bcc00b9SEric Miao input_report_abs(touch->input_dev, ABS_X, x); 130*9bcc00b9SEric Miao input_report_abs(touch->input_dev, ABS_Y, y); 131*9bcc00b9SEric Miao input_report_key(touch->input_dev, BTN_TOUCH, 1); 132*9bcc00b9SEric Miao 133*9bcc00b9SEric Miao input_sync(touch->input_dev); 134*9bcc00b9SEric Miao } 135*9bcc00b9SEric Miao 136*9bcc00b9SEric Miao static inline void report_pen_up(struct da9034_touch *touch) 137*9bcc00b9SEric Miao { 138*9bcc00b9SEric Miao input_report_key(touch->input_dev, BTN_TOUCH, 0); 139*9bcc00b9SEric Miao input_sync(touch->input_dev); 140*9bcc00b9SEric Miao } 141*9bcc00b9SEric Miao 142*9bcc00b9SEric Miao static void da9034_event_handler(struct da9034_touch *touch, int event) 143*9bcc00b9SEric Miao { 144*9bcc00b9SEric Miao int err; 145*9bcc00b9SEric Miao 146*9bcc00b9SEric Miao switch (touch->state) { 147*9bcc00b9SEric Miao case STATE_IDLE: 148*9bcc00b9SEric Miao if (event != EVENT_PEN_DOWN) 149*9bcc00b9SEric Miao break; 150*9bcc00b9SEric Miao 151*9bcc00b9SEric Miao /* Enable auto measurement of the TSI, this will 152*9bcc00b9SEric Miao * automatically disable pen down detection 153*9bcc00b9SEric Miao */ 154*9bcc00b9SEric Miao err = start_tsi(touch); 155*9bcc00b9SEric Miao if (err) 156*9bcc00b9SEric Miao goto err_reset; 157*9bcc00b9SEric Miao 158*9bcc00b9SEric Miao touch->state = STATE_BUSY; 159*9bcc00b9SEric Miao break; 160*9bcc00b9SEric Miao 161*9bcc00b9SEric Miao case STATE_BUSY: 162*9bcc00b9SEric Miao if (event != EVENT_TSI_READY) 163*9bcc00b9SEric Miao break; 164*9bcc00b9SEric Miao 165*9bcc00b9SEric Miao err = read_tsi(touch); 166*9bcc00b9SEric Miao if (err) 167*9bcc00b9SEric Miao goto err_reset; 168*9bcc00b9SEric Miao 169*9bcc00b9SEric Miao /* Disable auto measurement of the TSI, so that 170*9bcc00b9SEric Miao * pen down status will be available 171*9bcc00b9SEric Miao */ 172*9bcc00b9SEric Miao err = stop_tsi(touch); 173*9bcc00b9SEric Miao if (err) 174*9bcc00b9SEric Miao goto err_reset; 175*9bcc00b9SEric Miao 176*9bcc00b9SEric Miao touch->state = STATE_STOP; 177*9bcc00b9SEric Miao break; 178*9bcc00b9SEric Miao 179*9bcc00b9SEric Miao case STATE_STOP: 180*9bcc00b9SEric Miao if (event == EVENT_PEN_DOWN) { 181*9bcc00b9SEric Miao report_pen_down(touch); 182*9bcc00b9SEric Miao schedule_delayed_work(&touch->tsi_work, 183*9bcc00b9SEric Miao msecs_to_jiffies(touch->interval_ms)); 184*9bcc00b9SEric Miao touch->state = STATE_WAIT; 185*9bcc00b9SEric Miao } 186*9bcc00b9SEric Miao 187*9bcc00b9SEric Miao if (event == EVENT_PEN_UP) { 188*9bcc00b9SEric Miao report_pen_up(touch); 189*9bcc00b9SEric Miao touch->state = STATE_IDLE; 190*9bcc00b9SEric Miao } 191*9bcc00b9SEric Miao 192*9bcc00b9SEric Miao input_sync(touch->input_dev); 193*9bcc00b9SEric Miao break; 194*9bcc00b9SEric Miao 195*9bcc00b9SEric Miao case STATE_WAIT: 196*9bcc00b9SEric Miao if (event != EVENT_TIMEDOUT) 197*9bcc00b9SEric Miao break; 198*9bcc00b9SEric Miao 199*9bcc00b9SEric Miao if (is_pen_down(touch)) { 200*9bcc00b9SEric Miao start_tsi(touch); 201*9bcc00b9SEric Miao touch->state = STATE_BUSY; 202*9bcc00b9SEric Miao } else 203*9bcc00b9SEric Miao touch->state = STATE_IDLE; 204*9bcc00b9SEric Miao break; 205*9bcc00b9SEric Miao } 206*9bcc00b9SEric Miao return; 207*9bcc00b9SEric Miao 208*9bcc00b9SEric Miao err_reset: 209*9bcc00b9SEric Miao touch->state = STATE_IDLE; 210*9bcc00b9SEric Miao stop_tsi(touch); 211*9bcc00b9SEric Miao detect_pen_down(touch, 1); 212*9bcc00b9SEric Miao } 213*9bcc00b9SEric Miao 214*9bcc00b9SEric Miao static void da9034_tsi_work(struct work_struct *work) 215*9bcc00b9SEric Miao { 216*9bcc00b9SEric Miao struct da9034_touch *touch = 217*9bcc00b9SEric Miao container_of(work, struct da9034_touch, tsi_work.work); 218*9bcc00b9SEric Miao 219*9bcc00b9SEric Miao da9034_event_handler(touch, EVENT_TIMEDOUT); 220*9bcc00b9SEric Miao } 221*9bcc00b9SEric Miao 222*9bcc00b9SEric Miao static int da9034_touch_notifier(struct notifier_block *nb, 223*9bcc00b9SEric Miao unsigned long event, void *data) 224*9bcc00b9SEric Miao { 225*9bcc00b9SEric Miao struct da9034_touch *touch = 226*9bcc00b9SEric Miao container_of(nb, struct da9034_touch, notifier); 227*9bcc00b9SEric Miao 228*9bcc00b9SEric Miao if (event & DA9034_EVENT_PEN_DOWN) { 229*9bcc00b9SEric Miao if (is_pen_down(touch)) 230*9bcc00b9SEric Miao da9034_event_handler(touch, EVENT_PEN_DOWN); 231*9bcc00b9SEric Miao else 232*9bcc00b9SEric Miao da9034_event_handler(touch, EVENT_PEN_UP); 233*9bcc00b9SEric Miao } 234*9bcc00b9SEric Miao 235*9bcc00b9SEric Miao if (event & DA9034_EVENT_TSI_READY) 236*9bcc00b9SEric Miao da9034_event_handler(touch, EVENT_TSI_READY); 237*9bcc00b9SEric Miao 238*9bcc00b9SEric Miao return 0; 239*9bcc00b9SEric Miao } 240*9bcc00b9SEric Miao 241*9bcc00b9SEric Miao static int da9034_touch_open(struct input_dev *dev) 242*9bcc00b9SEric Miao { 243*9bcc00b9SEric Miao struct da9034_touch *touch = input_get_drvdata(dev); 244*9bcc00b9SEric Miao int ret; 245*9bcc00b9SEric Miao 246*9bcc00b9SEric Miao ret = da903x_register_notifier(touch->da9034_dev, &touch->notifier, 247*9bcc00b9SEric Miao DA9034_EVENT_PEN_DOWN | DA9034_EVENT_TSI_READY); 248*9bcc00b9SEric Miao if (ret) 249*9bcc00b9SEric Miao return -EBUSY; 250*9bcc00b9SEric Miao 251*9bcc00b9SEric Miao /* Enable ADC LDO */ 252*9bcc00b9SEric Miao ret = da903x_set_bits(touch->da9034_dev, 253*9bcc00b9SEric Miao DA9034_MANUAL_CTRL, DA9034_LDO_ADC_EN); 254*9bcc00b9SEric Miao if (ret) 255*9bcc00b9SEric Miao return ret; 256*9bcc00b9SEric Miao 257*9bcc00b9SEric Miao /* TSI_DELAY: 3 slots, TSI_SKIP: 3 slots */ 258*9bcc00b9SEric Miao ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL1, 0x1b); 259*9bcc00b9SEric Miao if (ret) 260*9bcc00b9SEric Miao return ret; 261*9bcc00b9SEric Miao 262*9bcc00b9SEric Miao ret = da903x_write(touch->da9034_dev, DA9034_TSI_CTRL2, 0x00); 263*9bcc00b9SEric Miao if (ret) 264*9bcc00b9SEric Miao return ret; 265*9bcc00b9SEric Miao 266*9bcc00b9SEric Miao touch->state = STATE_IDLE; 267*9bcc00b9SEric Miao detect_pen_down(touch, 1); 268*9bcc00b9SEric Miao 269*9bcc00b9SEric Miao return 0; 270*9bcc00b9SEric Miao } 271*9bcc00b9SEric Miao 272*9bcc00b9SEric Miao static void da9034_touch_close(struct input_dev *dev) 273*9bcc00b9SEric Miao { 274*9bcc00b9SEric Miao struct da9034_touch *touch = input_get_drvdata(dev); 275*9bcc00b9SEric Miao 276*9bcc00b9SEric Miao da903x_unregister_notifier(touch->da9034_dev, &touch->notifier, 277*9bcc00b9SEric Miao DA9034_EVENT_PEN_DOWN | DA9034_EVENT_TSI_READY); 278*9bcc00b9SEric Miao 279*9bcc00b9SEric Miao cancel_delayed_work_sync(&touch->tsi_work); 280*9bcc00b9SEric Miao 281*9bcc00b9SEric Miao touch->state = STATE_IDLE; 282*9bcc00b9SEric Miao stop_tsi(touch); 283*9bcc00b9SEric Miao detect_pen_down(touch, 0); 284*9bcc00b9SEric Miao 285*9bcc00b9SEric Miao /* Disable ADC LDO */ 286*9bcc00b9SEric Miao da903x_clr_bits(touch->da9034_dev, 287*9bcc00b9SEric Miao DA9034_MANUAL_CTRL, DA9034_LDO_ADC_EN); 288*9bcc00b9SEric Miao } 289*9bcc00b9SEric Miao 290*9bcc00b9SEric Miao 291*9bcc00b9SEric Miao static int __devinit da9034_touch_probe(struct platform_device *pdev) 292*9bcc00b9SEric Miao { 293*9bcc00b9SEric Miao struct da9034_touch_pdata *pdata = pdev->dev.platform_data; 294*9bcc00b9SEric Miao struct da9034_touch *touch; 295*9bcc00b9SEric Miao struct input_dev *input_dev; 296*9bcc00b9SEric Miao int ret; 297*9bcc00b9SEric Miao 298*9bcc00b9SEric Miao touch = kzalloc(sizeof(struct da9034_touch), GFP_KERNEL); 299*9bcc00b9SEric Miao if (touch == NULL) { 300*9bcc00b9SEric Miao dev_err(&pdev->dev, "failed to allocate driver data\n"); 301*9bcc00b9SEric Miao return -ENOMEM; 302*9bcc00b9SEric Miao } 303*9bcc00b9SEric Miao 304*9bcc00b9SEric Miao touch->da9034_dev = pdev->dev.parent; 305*9bcc00b9SEric Miao 306*9bcc00b9SEric Miao if (pdata) { 307*9bcc00b9SEric Miao touch->interval_ms = pdata->interval_ms; 308*9bcc00b9SEric Miao touch->x_inverted = pdata->x_inverted; 309*9bcc00b9SEric Miao touch->y_inverted = pdata->y_inverted; 310*9bcc00b9SEric Miao } else 311*9bcc00b9SEric Miao /* fallback into default */ 312*9bcc00b9SEric Miao touch->interval_ms = 10; 313*9bcc00b9SEric Miao 314*9bcc00b9SEric Miao INIT_DELAYED_WORK(&touch->tsi_work, da9034_tsi_work); 315*9bcc00b9SEric Miao touch->notifier.notifier_call = da9034_touch_notifier; 316*9bcc00b9SEric Miao 317*9bcc00b9SEric Miao input_dev = input_allocate_device(); 318*9bcc00b9SEric Miao if (!input_dev) { 319*9bcc00b9SEric Miao dev_err(&pdev->dev, "failed to allocate input device\n"); 320*9bcc00b9SEric Miao ret = -ENOMEM; 321*9bcc00b9SEric Miao goto err_free_touch; 322*9bcc00b9SEric Miao } 323*9bcc00b9SEric Miao 324*9bcc00b9SEric Miao input_dev->name = pdev->name; 325*9bcc00b9SEric Miao input_dev->open = da9034_touch_open; 326*9bcc00b9SEric Miao input_dev->close = da9034_touch_close; 327*9bcc00b9SEric Miao input_dev->dev.parent = &pdev->dev; 328*9bcc00b9SEric Miao 329*9bcc00b9SEric Miao __set_bit(EV_ABS, input_dev->evbit); 330*9bcc00b9SEric Miao __set_bit(ABS_X, input_dev->absbit); 331*9bcc00b9SEric Miao __set_bit(ABS_Y, input_dev->absbit); 332*9bcc00b9SEric Miao input_set_abs_params(input_dev, ABS_X, 0, 1023, 0, 0); 333*9bcc00b9SEric Miao input_set_abs_params(input_dev, ABS_Y, 0, 1023, 0, 0); 334*9bcc00b9SEric Miao 335*9bcc00b9SEric Miao __set_bit(EV_KEY, input_dev->evbit); 336*9bcc00b9SEric Miao __set_bit(BTN_TOUCH, input_dev->keybit); 337*9bcc00b9SEric Miao 338*9bcc00b9SEric Miao touch->input_dev = input_dev; 339*9bcc00b9SEric Miao input_set_drvdata(input_dev, touch); 340*9bcc00b9SEric Miao 341*9bcc00b9SEric Miao ret = input_register_device(input_dev); 342*9bcc00b9SEric Miao if (ret) 343*9bcc00b9SEric Miao goto err_free_input; 344*9bcc00b9SEric Miao 345*9bcc00b9SEric Miao platform_set_drvdata(pdev, touch); 346*9bcc00b9SEric Miao return 0; 347*9bcc00b9SEric Miao 348*9bcc00b9SEric Miao err_free_input: 349*9bcc00b9SEric Miao input_free_device(input_dev); 350*9bcc00b9SEric Miao err_free_touch: 351*9bcc00b9SEric Miao kfree(touch); 352*9bcc00b9SEric Miao return ret; 353*9bcc00b9SEric Miao } 354*9bcc00b9SEric Miao 355*9bcc00b9SEric Miao static int __devexit da9034_touch_remove(struct platform_device *pdev) 356*9bcc00b9SEric Miao { 357*9bcc00b9SEric Miao struct da9034_touch *touch = platform_get_drvdata(pdev); 358*9bcc00b9SEric Miao 359*9bcc00b9SEric Miao input_unregister_device(touch->input_dev); 360*9bcc00b9SEric Miao kfree(touch); 361*9bcc00b9SEric Miao 362*9bcc00b9SEric Miao return 0; 363*9bcc00b9SEric Miao } 364*9bcc00b9SEric Miao 365*9bcc00b9SEric Miao static struct platform_driver da9034_touch_driver = { 366*9bcc00b9SEric Miao .driver = { 367*9bcc00b9SEric Miao .name = "da9034-touch", 368*9bcc00b9SEric Miao .owner = THIS_MODULE, 369*9bcc00b9SEric Miao }, 370*9bcc00b9SEric Miao .probe = da9034_touch_probe, 371*9bcc00b9SEric Miao .remove = __devexit_p(da9034_touch_remove), 372*9bcc00b9SEric Miao }; 373*9bcc00b9SEric Miao 374*9bcc00b9SEric Miao static int __init da9034_touch_init(void) 375*9bcc00b9SEric Miao { 376*9bcc00b9SEric Miao return platform_driver_register(&da9034_touch_driver); 377*9bcc00b9SEric Miao } 378*9bcc00b9SEric Miao module_init(da9034_touch_init); 379*9bcc00b9SEric Miao 380*9bcc00b9SEric Miao static void __exit da9034_touch_exit(void) 381*9bcc00b9SEric Miao { 382*9bcc00b9SEric Miao platform_driver_unregister(&da9034_touch_driver); 383*9bcc00b9SEric Miao } 384*9bcc00b9SEric Miao module_exit(da9034_touch_exit); 385*9bcc00b9SEric Miao 386*9bcc00b9SEric Miao MODULE_DESCRIPTION("Touchscreen driver for Dialog Semiconductor DA9034"); 387*9bcc00b9SEric Miao MODULE_AUTHOR("Eric Miao <eric.miao@marvell.com>"); 388*9bcc00b9SEric Miao MODULE_LICENSE("GPL"); 389*9bcc00b9SEric Miao MODULE_ALIAS("platform:da9034-touch"); 390