1d2912cb1SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2f1443404SH. Nikolaus Schaller /* 3f1443404SH. Nikolaus Schaller * drivers/input/touchscreen/tsc2007.c 4f1443404SH. Nikolaus Schaller * 5f1443404SH. Nikolaus Schaller * Copyright (c) 2008 MtekVision Co., Ltd. 6f1443404SH. Nikolaus Schaller * Kwangwoo Lee <kwlee@mtekvision.com> 7f1443404SH. Nikolaus Schaller * 8f1443404SH. Nikolaus Schaller * Using code from: 9f1443404SH. Nikolaus Schaller * - ads7846.c 10f1443404SH. Nikolaus Schaller * Copyright (c) 2005 David Brownell 11f1443404SH. Nikolaus Schaller * Copyright (c) 2006 Nokia Corporation 12f1443404SH. Nikolaus Schaller * - corgi_ts.c 13f1443404SH. Nikolaus Schaller * Copyright (C) 2004-2005 Richard Purdie 14f1443404SH. Nikolaus Schaller * - omap_ts.[hc], ads7846.h, ts_osk.c 15f1443404SH. Nikolaus Schaller * Copyright (C) 2002 MontaVista Software 16f1443404SH. Nikolaus Schaller * Copyright (C) 2004 Texas Instruments 17f1443404SH. Nikolaus Schaller * Copyright (C) 2005 Dirk Behme 18f1443404SH. Nikolaus Schaller */ 19f1443404SH. Nikolaus Schaller 20f1443404SH. Nikolaus Schaller #include <linux/module.h> 21f1443404SH. Nikolaus Schaller #include <linux/slab.h> 22cee451c9SAndy Shevchenko #include <linux/gpio/consumer.h> 23f1443404SH. Nikolaus Schaller #include <linux/input.h> 24f1443404SH. Nikolaus Schaller #include <linux/interrupt.h> 25f1443404SH. Nikolaus Schaller #include <linux/i2c.h> 26e512a9e9SAndy Shevchenko #include <linux/mod_devicetable.h> 27e512a9e9SAndy Shevchenko #include <linux/property.h> 288fd70815SWolfram Sang #include <linux/platform_data/tsc2007.h> 29f1443404SH. Nikolaus Schaller #include "tsc2007.h" 30f1443404SH. Nikolaus Schaller 31f1443404SH. Nikolaus Schaller int tsc2007_xfer(struct tsc2007 *tsc, u8 cmd) 32f1443404SH. Nikolaus Schaller { 33f1443404SH. Nikolaus Schaller s32 data; 34f1443404SH. Nikolaus Schaller u16 val; 35f1443404SH. Nikolaus Schaller 36f1443404SH. Nikolaus Schaller data = i2c_smbus_read_word_data(tsc->client, cmd); 37f1443404SH. Nikolaus Schaller if (data < 0) { 38f1443404SH. Nikolaus Schaller dev_err(&tsc->client->dev, "i2c io error: %d\n", data); 39f1443404SH. Nikolaus Schaller return data; 40f1443404SH. Nikolaus Schaller } 41f1443404SH. Nikolaus Schaller 42f1443404SH. Nikolaus Schaller /* The protocol and raw data format from i2c interface: 43f1443404SH. Nikolaus Schaller * S Addr Wr [A] Comm [A] S Addr Rd [A] [DataLow] A [DataHigh] NA P 44f1443404SH. Nikolaus Schaller * Where DataLow has [D11-D4], DataHigh has [D3-D0 << 4 | Dummy 4bit]. 45f1443404SH. Nikolaus Schaller */ 46f1443404SH. Nikolaus Schaller val = swab16(data) >> 4; 47f1443404SH. Nikolaus Schaller 48f1443404SH. Nikolaus Schaller dev_dbg(&tsc->client->dev, "data: 0x%x, val: 0x%x\n", data, val); 49f1443404SH. Nikolaus Schaller 50f1443404SH. Nikolaus Schaller return val; 51f1443404SH. Nikolaus Schaller } 52f1443404SH. Nikolaus Schaller 53f1443404SH. Nikolaus Schaller static void tsc2007_read_values(struct tsc2007 *tsc, struct ts_event *tc) 54f1443404SH. Nikolaus Schaller { 55f1443404SH. Nikolaus Schaller /* y- still on; turn on only y+ (and ADC) */ 56f1443404SH. Nikolaus Schaller tc->y = tsc2007_xfer(tsc, READ_Y); 57f1443404SH. Nikolaus Schaller 58f1443404SH. Nikolaus Schaller /* turn y- off, x+ on, then leave in lowpower */ 59f1443404SH. Nikolaus Schaller tc->x = tsc2007_xfer(tsc, READ_X); 60f1443404SH. Nikolaus Schaller 61f1443404SH. Nikolaus Schaller /* turn y+ off, x- on; we'll use formula #1 */ 62f1443404SH. Nikolaus Schaller tc->z1 = tsc2007_xfer(tsc, READ_Z1); 63f1443404SH. Nikolaus Schaller tc->z2 = tsc2007_xfer(tsc, READ_Z2); 64f1443404SH. Nikolaus Schaller 65f1443404SH. Nikolaus Schaller /* Prepare for next touch reading - power down ADC, enable PENIRQ */ 66f1443404SH. Nikolaus Schaller tsc2007_xfer(tsc, PWRDOWN); 67f1443404SH. Nikolaus Schaller } 68f1443404SH. Nikolaus Schaller 69deec586dSH. Nikolaus Schaller u32 tsc2007_calculate_resistance(struct tsc2007 *tsc, struct ts_event *tc) 70f1443404SH. Nikolaus Schaller { 71f1443404SH. Nikolaus Schaller u32 rt = 0; 72f1443404SH. Nikolaus Schaller 73f1443404SH. Nikolaus Schaller /* range filtering */ 74f1443404SH. Nikolaus Schaller if (tc->x == MAX_12BIT) 75f1443404SH. Nikolaus Schaller tc->x = 0; 76f1443404SH. Nikolaus Schaller 77f1443404SH. Nikolaus Schaller if (likely(tc->x && tc->z1)) { 78deec586dSH. Nikolaus Schaller /* compute touch resistance using equation #1 */ 79f1443404SH. Nikolaus Schaller rt = tc->z2 - tc->z1; 80f1443404SH. Nikolaus Schaller rt *= tc->x; 81f1443404SH. Nikolaus Schaller rt *= tsc->x_plate_ohms; 82f1443404SH. Nikolaus Schaller rt /= tc->z1; 83f1443404SH. Nikolaus Schaller rt = (rt + 2047) >> 12; 84f1443404SH. Nikolaus Schaller } 85f1443404SH. Nikolaus Schaller 86f1443404SH. Nikolaus Schaller return rt; 87f1443404SH. Nikolaus Schaller } 88f1443404SH. Nikolaus Schaller 89f1443404SH. Nikolaus Schaller bool tsc2007_is_pen_down(struct tsc2007 *ts) 90f1443404SH. Nikolaus Schaller { 91f1443404SH. Nikolaus Schaller /* 92f1443404SH. Nikolaus Schaller * NOTE: We can't rely on the pressure to determine the pen down 93f1443404SH. Nikolaus Schaller * state, even though this controller has a pressure sensor. 94f1443404SH. Nikolaus Schaller * The pressure value can fluctuate for quite a while after 95f1443404SH. Nikolaus Schaller * lifting the pen and in some cases may not even settle at the 96f1443404SH. Nikolaus Schaller * expected value. 97f1443404SH. Nikolaus Schaller * 98f1443404SH. Nikolaus Schaller * The only safe way to check for the pen up condition is in the 99f1443404SH. Nikolaus Schaller * work function by reading the pen signal state (it's a GPIO 100f1443404SH. Nikolaus Schaller * and IRQ). Unfortunately such callback is not always available, 101f1443404SH. Nikolaus Schaller * in that case we assume that the pen is down and expect caller 102f1443404SH. Nikolaus Schaller * to fall back on the pressure reading. 103f1443404SH. Nikolaus Schaller */ 104f1443404SH. Nikolaus Schaller 105f1443404SH. Nikolaus Schaller if (!ts->get_pendown_state) 106f1443404SH. Nikolaus Schaller return true; 107f1443404SH. Nikolaus Schaller 108f1443404SH. Nikolaus Schaller return ts->get_pendown_state(&ts->client->dev); 109f1443404SH. Nikolaus Schaller } 110f1443404SH. Nikolaus Schaller 111f1443404SH. Nikolaus Schaller static irqreturn_t tsc2007_soft_irq(int irq, void *handle) 112f1443404SH. Nikolaus Schaller { 113f1443404SH. Nikolaus Schaller struct tsc2007 *ts = handle; 114f1443404SH. Nikolaus Schaller struct input_dev *input = ts->input; 115f1443404SH. Nikolaus Schaller struct ts_event tc; 116f1443404SH. Nikolaus Schaller u32 rt; 117f1443404SH. Nikolaus Schaller 118f1443404SH. Nikolaus Schaller while (!ts->stopped && tsc2007_is_pen_down(ts)) { 119f1443404SH. Nikolaus Schaller 120f1443404SH. Nikolaus Schaller /* pen is down, continue with the measurement */ 121f1443404SH. Nikolaus Schaller 122f1443404SH. Nikolaus Schaller mutex_lock(&ts->mlock); 123f1443404SH. Nikolaus Schaller tsc2007_read_values(ts, &tc); 124f1443404SH. Nikolaus Schaller mutex_unlock(&ts->mlock); 125f1443404SH. Nikolaus Schaller 126deec586dSH. Nikolaus Schaller rt = tsc2007_calculate_resistance(ts, &tc); 127f1443404SH. Nikolaus Schaller 128f1443404SH. Nikolaus Schaller if (!rt && !ts->get_pendown_state) { 129f1443404SH. Nikolaus Schaller /* 130f1443404SH. Nikolaus Schaller * If pressure reported is 0 and we don't have 131f1443404SH. Nikolaus Schaller * callback to check pendown state, we have to 132f1443404SH. Nikolaus Schaller * assume that pen was lifted up. 133f1443404SH. Nikolaus Schaller */ 134f1443404SH. Nikolaus Schaller break; 135f1443404SH. Nikolaus Schaller } 136f1443404SH. Nikolaus Schaller 137f1443404SH. Nikolaus Schaller if (rt <= ts->max_rt) { 138f1443404SH. Nikolaus Schaller dev_dbg(&ts->client->dev, 139deec586dSH. Nikolaus Schaller "DOWN point(%4d,%4d), resistance (%4u)\n", 140f1443404SH. Nikolaus Schaller tc.x, tc.y, rt); 141f1443404SH. Nikolaus Schaller 142db4572ffSH. Nikolaus Schaller rt = ts->max_rt - rt; 143db4572ffSH. Nikolaus Schaller 144f1443404SH. Nikolaus Schaller input_report_key(input, BTN_TOUCH, 1); 145f1443404SH. Nikolaus Schaller input_report_abs(input, ABS_X, tc.x); 146f1443404SH. Nikolaus Schaller input_report_abs(input, ABS_Y, tc.y); 147f1443404SH. Nikolaus Schaller input_report_abs(input, ABS_PRESSURE, rt); 148f1443404SH. Nikolaus Schaller 149f1443404SH. Nikolaus Schaller input_sync(input); 150f1443404SH. Nikolaus Schaller 151f1443404SH. Nikolaus Schaller } else { 152f1443404SH. Nikolaus Schaller /* 153f1443404SH. Nikolaus Schaller * Sample found inconsistent by debouncing or pressure is 154f1443404SH. Nikolaus Schaller * beyond the maximum. Don't report it to user space, 155f1443404SH. Nikolaus Schaller * repeat at least once more the measurement. 156f1443404SH. Nikolaus Schaller */ 157f1443404SH. Nikolaus Schaller dev_dbg(&ts->client->dev, "ignored pressure %d\n", rt); 158f1443404SH. Nikolaus Schaller } 159f1443404SH. Nikolaus Schaller 160f1443404SH. Nikolaus Schaller wait_event_timeout(ts->wait, ts->stopped, ts->poll_period); 161f1443404SH. Nikolaus Schaller } 162f1443404SH. Nikolaus Schaller 163f1443404SH. Nikolaus Schaller dev_dbg(&ts->client->dev, "UP\n"); 164f1443404SH. Nikolaus Schaller 165f1443404SH. Nikolaus Schaller input_report_key(input, BTN_TOUCH, 0); 166f1443404SH. Nikolaus Schaller input_report_abs(input, ABS_PRESSURE, 0); 167f1443404SH. Nikolaus Schaller input_sync(input); 168f1443404SH. Nikolaus Schaller 169f1443404SH. Nikolaus Schaller if (ts->clear_penirq) 170f1443404SH. Nikolaus Schaller ts->clear_penirq(); 171f1443404SH. Nikolaus Schaller 172f1443404SH. Nikolaus Schaller return IRQ_HANDLED; 173f1443404SH. Nikolaus Schaller } 174f1443404SH. Nikolaus Schaller 175f1443404SH. Nikolaus Schaller static void tsc2007_stop(struct tsc2007 *ts) 176f1443404SH. Nikolaus Schaller { 177f1443404SH. Nikolaus Schaller ts->stopped = true; 178f1443404SH. Nikolaus Schaller mb(); 179f1443404SH. Nikolaus Schaller wake_up(&ts->wait); 180f1443404SH. Nikolaus Schaller 181f1443404SH. Nikolaus Schaller disable_irq(ts->irq); 182f1443404SH. Nikolaus Schaller } 183f1443404SH. Nikolaus Schaller 184f1443404SH. Nikolaus Schaller static int tsc2007_open(struct input_dev *input_dev) 185f1443404SH. Nikolaus Schaller { 186f1443404SH. Nikolaus Schaller struct tsc2007 *ts = input_get_drvdata(input_dev); 187f1443404SH. Nikolaus Schaller int err; 188f1443404SH. Nikolaus Schaller 189f1443404SH. Nikolaus Schaller ts->stopped = false; 190f1443404SH. Nikolaus Schaller mb(); 191f1443404SH. Nikolaus Schaller 192f1443404SH. Nikolaus Schaller enable_irq(ts->irq); 193f1443404SH. Nikolaus Schaller 194f1443404SH. Nikolaus Schaller /* Prepare for touch readings - power down ADC and enable PENIRQ */ 195f1443404SH. Nikolaus Schaller err = tsc2007_xfer(ts, PWRDOWN); 196f1443404SH. Nikolaus Schaller if (err < 0) { 197f1443404SH. Nikolaus Schaller tsc2007_stop(ts); 198f1443404SH. Nikolaus Schaller return err; 199f1443404SH. Nikolaus Schaller } 200f1443404SH. Nikolaus Schaller 201f1443404SH. Nikolaus Schaller return 0; 202f1443404SH. Nikolaus Schaller } 203f1443404SH. Nikolaus Schaller 204f1443404SH. Nikolaus Schaller static void tsc2007_close(struct input_dev *input_dev) 205f1443404SH. Nikolaus Schaller { 206f1443404SH. Nikolaus Schaller struct tsc2007 *ts = input_get_drvdata(input_dev); 207f1443404SH. Nikolaus Schaller 208f1443404SH. Nikolaus Schaller tsc2007_stop(ts); 209f1443404SH. Nikolaus Schaller } 210f1443404SH. Nikolaus Schaller 211f1443404SH. Nikolaus Schaller static int tsc2007_get_pendown_state_gpio(struct device *dev) 212f1443404SH. Nikolaus Schaller { 213f1443404SH. Nikolaus Schaller struct i2c_client *client = to_i2c_client(dev); 214f1443404SH. Nikolaus Schaller struct tsc2007 *ts = i2c_get_clientdata(client); 215f1443404SH. Nikolaus Schaller 216*1661f60aSBenjamin Bara return gpiod_get_value_cansleep(ts->gpiod); 217f1443404SH. Nikolaus Schaller } 218f1443404SH. Nikolaus Schaller 219e512a9e9SAndy Shevchenko static int tsc2007_probe_properties(struct device *dev, struct tsc2007 *ts) 220f1443404SH. Nikolaus Schaller { 221f1443404SH. Nikolaus Schaller u32 val32; 222f1443404SH. Nikolaus Schaller u64 val64; 223f1443404SH. Nikolaus Schaller 224e512a9e9SAndy Shevchenko if (!device_property_read_u32(dev, "ti,max-rt", &val32)) 225f1443404SH. Nikolaus Schaller ts->max_rt = val32; 226f1443404SH. Nikolaus Schaller else 227f1443404SH. Nikolaus Schaller ts->max_rt = MAX_12BIT; 228f1443404SH. Nikolaus Schaller 229e512a9e9SAndy Shevchenko if (!device_property_read_u32(dev, "ti,fuzzx", &val32)) 230f1443404SH. Nikolaus Schaller ts->fuzzx = val32; 231f1443404SH. Nikolaus Schaller 232e512a9e9SAndy Shevchenko if (!device_property_read_u32(dev, "ti,fuzzy", &val32)) 233f1443404SH. Nikolaus Schaller ts->fuzzy = val32; 234f1443404SH. Nikolaus Schaller 235e512a9e9SAndy Shevchenko if (!device_property_read_u32(dev, "ti,fuzzz", &val32)) 236f1443404SH. Nikolaus Schaller ts->fuzzz = val32; 237f1443404SH. Nikolaus Schaller 238e512a9e9SAndy Shevchenko if (!device_property_read_u64(dev, "ti,poll-period", &val64)) 239f1443404SH. Nikolaus Schaller ts->poll_period = msecs_to_jiffies(val64); 240f1443404SH. Nikolaus Schaller else 241f1443404SH. Nikolaus Schaller ts->poll_period = msecs_to_jiffies(1); 242f1443404SH. Nikolaus Schaller 243e512a9e9SAndy Shevchenko if (!device_property_read_u32(dev, "ti,x-plate-ohms", &val32)) { 244f1443404SH. Nikolaus Schaller ts->x_plate_ohms = val32; 245f1443404SH. Nikolaus Schaller } else { 246e512a9e9SAndy Shevchenko dev_err(dev, "Missing ti,x-plate-ohms device property\n"); 247f1443404SH. Nikolaus Schaller return -EINVAL; 248f1443404SH. Nikolaus Schaller } 249f1443404SH. Nikolaus Schaller 250e512a9e9SAndy Shevchenko ts->gpiod = devm_gpiod_get_optional(dev, NULL, GPIOD_IN); 251cee451c9SAndy Shevchenko if (IS_ERR(ts->gpiod)) 252cee451c9SAndy Shevchenko return PTR_ERR(ts->gpiod); 253cee451c9SAndy Shevchenko 254cee451c9SAndy Shevchenko if (ts->gpiod) 255f1443404SH. Nikolaus Schaller ts->get_pendown_state = tsc2007_get_pendown_state_gpio; 256f1443404SH. Nikolaus Schaller else 257e512a9e9SAndy Shevchenko dev_warn(dev, "Pen down GPIO is not specified in properties\n"); 258f1443404SH. Nikolaus Schaller 259f1443404SH. Nikolaus Schaller return 0; 260f1443404SH. Nikolaus Schaller } 261f1443404SH. Nikolaus Schaller 262e512a9e9SAndy Shevchenko static int tsc2007_probe_pdev(struct device *dev, struct tsc2007 *ts, 263f1443404SH. Nikolaus Schaller const struct tsc2007_platform_data *pdata, 264f1443404SH. Nikolaus Schaller const struct i2c_device_id *id) 265f1443404SH. Nikolaus Schaller { 266f1443404SH. Nikolaus Schaller ts->model = pdata->model; 267f1443404SH. Nikolaus Schaller ts->x_plate_ohms = pdata->x_plate_ohms; 268f1443404SH. Nikolaus Schaller ts->max_rt = pdata->max_rt ? : MAX_12BIT; 269f1443404SH. Nikolaus Schaller ts->poll_period = msecs_to_jiffies(pdata->poll_period ? : 1); 270f1443404SH. Nikolaus Schaller ts->get_pendown_state = pdata->get_pendown_state; 271f1443404SH. Nikolaus Schaller ts->clear_penirq = pdata->clear_penirq; 272f1443404SH. Nikolaus Schaller ts->fuzzx = pdata->fuzzx; 273f1443404SH. Nikolaus Schaller ts->fuzzy = pdata->fuzzy; 274f1443404SH. Nikolaus Schaller ts->fuzzz = pdata->fuzzz; 275f1443404SH. Nikolaus Schaller 276f1443404SH. Nikolaus Schaller if (pdata->x_plate_ohms == 0) { 277e512a9e9SAndy Shevchenko dev_err(dev, "x_plate_ohms is not set up in platform data\n"); 278f1443404SH. Nikolaus Schaller return -EINVAL; 279f1443404SH. Nikolaus Schaller } 280f1443404SH. Nikolaus Schaller 281f1443404SH. Nikolaus Schaller return 0; 282f1443404SH. Nikolaus Schaller } 283f1443404SH. Nikolaus Schaller 284f1443404SH. Nikolaus Schaller static void tsc2007_call_exit_platform_hw(void *data) 285f1443404SH. Nikolaus Schaller { 286f1443404SH. Nikolaus Schaller struct device *dev = data; 287f1443404SH. Nikolaus Schaller const struct tsc2007_platform_data *pdata = dev_get_platdata(dev); 288f1443404SH. Nikolaus Schaller 289f1443404SH. Nikolaus Schaller pdata->exit_platform_hw(); 290f1443404SH. Nikolaus Schaller } 291f1443404SH. Nikolaus Schaller 2924e9d70a9SUwe Kleine-König static int tsc2007_probe(struct i2c_client *client) 293f1443404SH. Nikolaus Schaller { 2944e9d70a9SUwe Kleine-König const struct i2c_device_id *id = i2c_client_get_device_id(client); 295f1443404SH. Nikolaus Schaller const struct tsc2007_platform_data *pdata = 296f1443404SH. Nikolaus Schaller dev_get_platdata(&client->dev); 297f1443404SH. Nikolaus Schaller struct tsc2007 *ts; 298f1443404SH. Nikolaus Schaller struct input_dev *input_dev; 299f1443404SH. Nikolaus Schaller int err; 300f1443404SH. Nikolaus Schaller 301f1443404SH. Nikolaus Schaller if (!i2c_check_functionality(client->adapter, 302f1443404SH. Nikolaus Schaller I2C_FUNC_SMBUS_READ_WORD_DATA)) 303f1443404SH. Nikolaus Schaller return -EIO; 304f1443404SH. Nikolaus Schaller 305f1443404SH. Nikolaus Schaller ts = devm_kzalloc(&client->dev, sizeof(struct tsc2007), GFP_KERNEL); 306f1443404SH. Nikolaus Schaller if (!ts) 307f1443404SH. Nikolaus Schaller return -ENOMEM; 308f1443404SH. Nikolaus Schaller 309f1443404SH. Nikolaus Schaller if (pdata) 310e512a9e9SAndy Shevchenko err = tsc2007_probe_pdev(&client->dev, ts, pdata, id); 311f1443404SH. Nikolaus Schaller else 312e512a9e9SAndy Shevchenko err = tsc2007_probe_properties(&client->dev, ts); 313f1443404SH. Nikolaus Schaller if (err) 314f1443404SH. Nikolaus Schaller return err; 315f1443404SH. Nikolaus Schaller 316f1443404SH. Nikolaus Schaller input_dev = devm_input_allocate_device(&client->dev); 317f1443404SH. Nikolaus Schaller if (!input_dev) 318f1443404SH. Nikolaus Schaller return -ENOMEM; 319f1443404SH. Nikolaus Schaller 320f1443404SH. Nikolaus Schaller i2c_set_clientdata(client, ts); 321f1443404SH. Nikolaus Schaller 322f1443404SH. Nikolaus Schaller ts->client = client; 323f1443404SH. Nikolaus Schaller ts->irq = client->irq; 324f1443404SH. Nikolaus Schaller ts->input = input_dev; 325f1443404SH. Nikolaus Schaller 326f1443404SH. Nikolaus Schaller init_waitqueue_head(&ts->wait); 327f1443404SH. Nikolaus Schaller mutex_init(&ts->mlock); 328f1443404SH. Nikolaus Schaller 329f1443404SH. Nikolaus Schaller snprintf(ts->phys, sizeof(ts->phys), 330f1443404SH. Nikolaus Schaller "%s/input0", dev_name(&client->dev)); 331f1443404SH. Nikolaus Schaller 332f1443404SH. Nikolaus Schaller input_dev->name = "TSC2007 Touchscreen"; 333f1443404SH. Nikolaus Schaller input_dev->phys = ts->phys; 334f1443404SH. Nikolaus Schaller input_dev->id.bustype = BUS_I2C; 335f1443404SH. Nikolaus Schaller 336f1443404SH. Nikolaus Schaller input_dev->open = tsc2007_open; 337f1443404SH. Nikolaus Schaller input_dev->close = tsc2007_close; 338f1443404SH. Nikolaus Schaller 339f1443404SH. Nikolaus Schaller input_set_drvdata(input_dev, ts); 340f1443404SH. Nikolaus Schaller 341c61ebe83SDmitry Torokhov input_set_capability(input_dev, EV_KEY, BTN_TOUCH); 342f1443404SH. Nikolaus Schaller 343f1443404SH. Nikolaus Schaller input_set_abs_params(input_dev, ABS_X, 0, MAX_12BIT, ts->fuzzx, 0); 344f1443404SH. Nikolaus Schaller input_set_abs_params(input_dev, ABS_Y, 0, MAX_12BIT, ts->fuzzy, 0); 345f1443404SH. Nikolaus Schaller input_set_abs_params(input_dev, ABS_PRESSURE, 0, MAX_12BIT, 346f1443404SH. Nikolaus Schaller ts->fuzzz, 0); 347f1443404SH. Nikolaus Schaller 348f1443404SH. Nikolaus Schaller if (pdata) { 349f1443404SH. Nikolaus Schaller if (pdata->exit_platform_hw) { 350f1443404SH. Nikolaus Schaller err = devm_add_action(&client->dev, 351f1443404SH. Nikolaus Schaller tsc2007_call_exit_platform_hw, 352f1443404SH. Nikolaus Schaller &client->dev); 353f1443404SH. Nikolaus Schaller if (err) { 354f1443404SH. Nikolaus Schaller dev_err(&client->dev, 355f1443404SH. Nikolaus Schaller "Failed to register exit_platform_hw action, %d\n", 356f1443404SH. Nikolaus Schaller err); 357f1443404SH. Nikolaus Schaller return err; 358f1443404SH. Nikolaus Schaller } 359f1443404SH. Nikolaus Schaller } 360f1443404SH. Nikolaus Schaller 361f1443404SH. Nikolaus Schaller if (pdata->init_platform_hw) 362f1443404SH. Nikolaus Schaller pdata->init_platform_hw(); 363f1443404SH. Nikolaus Schaller } 364f1443404SH. Nikolaus Schaller 365f1443404SH. Nikolaus Schaller err = devm_request_threaded_irq(&client->dev, ts->irq, 366*1661f60aSBenjamin Bara NULL, tsc2007_soft_irq, 367f1443404SH. Nikolaus Schaller IRQF_ONESHOT, 368f1443404SH. Nikolaus Schaller client->dev.driver->name, ts); 369f1443404SH. Nikolaus Schaller if (err) { 370f1443404SH. Nikolaus Schaller dev_err(&client->dev, "Failed to request irq %d: %d\n", 371f1443404SH. Nikolaus Schaller ts->irq, err); 372f1443404SH. Nikolaus Schaller return err; 373f1443404SH. Nikolaus Schaller } 374f1443404SH. Nikolaus Schaller 375f1443404SH. Nikolaus Schaller tsc2007_stop(ts); 376f1443404SH. Nikolaus Schaller 377f1443404SH. Nikolaus Schaller /* power down the chip (TSC2007_SETUP does not ACK on I2C) */ 378f1443404SH. Nikolaus Schaller err = tsc2007_xfer(ts, PWRDOWN); 379f1443404SH. Nikolaus Schaller if (err < 0) { 380f1443404SH. Nikolaus Schaller dev_err(&client->dev, 381f1443404SH. Nikolaus Schaller "Failed to setup chip: %d\n", err); 382f1443404SH. Nikolaus Schaller return err; /* chip does not respond */ 383f1443404SH. Nikolaus Schaller } 384f1443404SH. Nikolaus Schaller 385f1443404SH. Nikolaus Schaller err = input_register_device(input_dev); 386f1443404SH. Nikolaus Schaller if (err) { 387f1443404SH. Nikolaus Schaller dev_err(&client->dev, 388f1443404SH. Nikolaus Schaller "Failed to register input device: %d\n", err); 389f1443404SH. Nikolaus Schaller return err; 390f1443404SH. Nikolaus Schaller } 391f1443404SH. Nikolaus Schaller 392f1443404SH. Nikolaus Schaller err = tsc2007_iio_configure(ts); 393f1443404SH. Nikolaus Schaller if (err) { 394f1443404SH. Nikolaus Schaller dev_err(&client->dev, 395f1443404SH. Nikolaus Schaller "Failed to register with IIO: %d\n", err); 396f1443404SH. Nikolaus Schaller return err; 397f1443404SH. Nikolaus Schaller } 398f1443404SH. Nikolaus Schaller 399f1443404SH. Nikolaus Schaller return 0; 400f1443404SH. Nikolaus Schaller } 401f1443404SH. Nikolaus Schaller 402f1443404SH. Nikolaus Schaller static const struct i2c_device_id tsc2007_idtable[] = { 403f1443404SH. Nikolaus Schaller { "tsc2007", 0 }, 404f1443404SH. Nikolaus Schaller { } 405f1443404SH. Nikolaus Schaller }; 406f1443404SH. Nikolaus Schaller 407f1443404SH. Nikolaus Schaller MODULE_DEVICE_TABLE(i2c, tsc2007_idtable); 408f1443404SH. Nikolaus Schaller 409f1443404SH. Nikolaus Schaller static const struct of_device_id tsc2007_of_match[] = { 410f1443404SH. Nikolaus Schaller { .compatible = "ti,tsc2007" }, 411f1443404SH. Nikolaus Schaller { /* sentinel */ } 412f1443404SH. Nikolaus Schaller }; 413f1443404SH. Nikolaus Schaller MODULE_DEVICE_TABLE(of, tsc2007_of_match); 414f1443404SH. Nikolaus Schaller 415f1443404SH. Nikolaus Schaller static struct i2c_driver tsc2007_driver = { 416f1443404SH. Nikolaus Schaller .driver = { 417f1443404SH. Nikolaus Schaller .name = "tsc2007", 418e512a9e9SAndy Shevchenko .of_match_table = tsc2007_of_match, 419f1443404SH. Nikolaus Schaller }, 420f1443404SH. Nikolaus Schaller .id_table = tsc2007_idtable, 4214e9d70a9SUwe Kleine-König .probe_new = tsc2007_probe, 422f1443404SH. Nikolaus Schaller }; 423f1443404SH. Nikolaus Schaller 424f1443404SH. Nikolaus Schaller module_i2c_driver(tsc2007_driver); 425f1443404SH. Nikolaus Schaller 426f1443404SH. Nikolaus Schaller MODULE_AUTHOR("Kwangwoo Lee <kwlee@mtekvision.com>"); 427f1443404SH. Nikolaus Schaller MODULE_DESCRIPTION("TSC2007 TouchScreen Driver"); 428f1443404SH. Nikolaus Schaller MODULE_LICENSE("GPL"); 429