1ca96ea86SBastien Nocera /* 2ca96ea86SBastien Nocera * Driver for Goodix Touchscreens 3ca96ea86SBastien Nocera * 4ca96ea86SBastien Nocera * Copyright (c) 2014 Red Hat Inc. 5ca96ea86SBastien Nocera * 6ca96ea86SBastien Nocera * This code is based on gt9xx.c authored by andrew@goodix.com: 7ca96ea86SBastien Nocera * 8ca96ea86SBastien Nocera * 2010 - 2012 Goodix Technology. 9ca96ea86SBastien Nocera */ 10ca96ea86SBastien Nocera 11ca96ea86SBastien Nocera /* 12ca96ea86SBastien Nocera * This program is free software; you can redistribute it and/or modify it 13ca96ea86SBastien Nocera * under the terms of the GNU General Public License as published by the Free 14ca96ea86SBastien Nocera * Software Foundation; version 2 of the License. 15ca96ea86SBastien Nocera */ 16ca96ea86SBastien Nocera 17ca96ea86SBastien Nocera #include <linux/kernel.h> 188b5a359cSBastien Nocera #include <linux/dmi.h> 1968caf858SIrina Tirdea #include <linux/firmware.h> 20ec6e1b40SIrina Tirdea #include <linux/gpio/consumer.h> 21ca96ea86SBastien Nocera #include <linux/i2c.h> 22ca96ea86SBastien Nocera #include <linux/input.h> 23ca96ea86SBastien Nocera #include <linux/input/mt.h> 24ca96ea86SBastien Nocera #include <linux/module.h> 25ca96ea86SBastien Nocera #include <linux/delay.h> 26ca96ea86SBastien Nocera #include <linux/irq.h> 27ca96ea86SBastien Nocera #include <linux/interrupt.h> 28ca96ea86SBastien Nocera #include <linux/slab.h> 29771d8f1bSAleksei Mamlin #include <linux/acpi.h> 30771d8f1bSAleksei Mamlin #include <linux/of.h> 31ca96ea86SBastien Nocera #include <asm/unaligned.h> 32ca96ea86SBastien Nocera 33ca96ea86SBastien Nocera struct goodix_ts_data { 34ca96ea86SBastien Nocera struct i2c_client *client; 35ca96ea86SBastien Nocera struct input_dev *input_dev; 36ca96ea86SBastien Nocera int abs_x_max; 37ca96ea86SBastien Nocera int abs_y_max; 38ca96ea86SBastien Nocera unsigned int max_touch_num; 39ca96ea86SBastien Nocera unsigned int int_trigger_type; 408b5a359cSBastien Nocera bool rotated_screen; 41a779fbc6SIrina Tirdea int cfg_len; 42ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_int; 43ec6e1b40SIrina Tirdea struct gpio_desc *gpiod_rst; 4468caf858SIrina Tirdea u16 id; 4568caf858SIrina Tirdea u16 version; 4668caf858SIrina Tirdea const char *cfg_name; 4768caf858SIrina Tirdea struct completion firmware_loading_complete; 48ca96ea86SBastien Nocera }; 49ca96ea86SBastien Nocera 50ec6e1b40SIrina Tirdea #define GOODIX_GPIO_INT_NAME "irq" 51ec6e1b40SIrina Tirdea #define GOODIX_GPIO_RST_NAME "reset" 52ec6e1b40SIrina Tirdea 53ca96ea86SBastien Nocera #define GOODIX_MAX_HEIGHT 4096 54ca96ea86SBastien Nocera #define GOODIX_MAX_WIDTH 4096 55ca96ea86SBastien Nocera #define GOODIX_INT_TRIGGER 1 56ca96ea86SBastien Nocera #define GOODIX_CONTACT_SIZE 8 57ca96ea86SBastien Nocera #define GOODIX_MAX_CONTACTS 10 58ca96ea86SBastien Nocera 59ca96ea86SBastien Nocera #define GOODIX_CONFIG_MAX_LENGTH 240 60a779fbc6SIrina Tirdea #define GOODIX_CONFIG_911_LENGTH 186 61a779fbc6SIrina Tirdea #define GOODIX_CONFIG_967_LENGTH 228 62ca96ea86SBastien Nocera 63ca96ea86SBastien Nocera /* Register defines */ 64ca96ea86SBastien Nocera #define GOODIX_READ_COOR_ADDR 0x814E 65ca96ea86SBastien Nocera #define GOODIX_REG_CONFIG_DATA 0x8047 66e70b0307SIrina Tirdea #define GOODIX_REG_ID 0x8140 67ca96ea86SBastien Nocera 68ca96ea86SBastien Nocera #define RESOLUTION_LOC 1 69a7ac7c95SAleksei Mamlin #define MAX_CONTACTS_LOC 5 70ca96ea86SBastien Nocera #define TRIGGER_LOC 6 71ca96ea86SBastien Nocera 72ca96ea86SBastien Nocera static const unsigned long goodix_irq_flags[] = { 73ca96ea86SBastien Nocera IRQ_TYPE_EDGE_RISING, 74ca96ea86SBastien Nocera IRQ_TYPE_EDGE_FALLING, 75ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_LOW, 76ca96ea86SBastien Nocera IRQ_TYPE_LEVEL_HIGH, 77ca96ea86SBastien Nocera }; 78ca96ea86SBastien Nocera 798b5a359cSBastien Nocera /* 808b5a359cSBastien Nocera * Those tablets have their coordinates origin at the bottom right 818b5a359cSBastien Nocera * of the tablet, as if rotated 180 degrees 828b5a359cSBastien Nocera */ 838b5a359cSBastien Nocera static const struct dmi_system_id rotated_screen[] = { 848b5a359cSBastien Nocera #if defined(CONFIG_DMI) && defined(CONFIG_X86) 858b5a359cSBastien Nocera { 868b5a359cSBastien Nocera .ident = "WinBook TW100", 878b5a359cSBastien Nocera .matches = { 888b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 898b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW100") 908b5a359cSBastien Nocera } 918b5a359cSBastien Nocera }, 928b5a359cSBastien Nocera { 938b5a359cSBastien Nocera .ident = "WinBook TW700", 948b5a359cSBastien Nocera .matches = { 958b5a359cSBastien Nocera DMI_MATCH(DMI_SYS_VENDOR, "WinBook"), 968b5a359cSBastien Nocera DMI_MATCH(DMI_PRODUCT_NAME, "TW700") 978b5a359cSBastien Nocera }, 988b5a359cSBastien Nocera }, 998b5a359cSBastien Nocera #endif 1008b5a359cSBastien Nocera {} 1018b5a359cSBastien Nocera }; 1028b5a359cSBastien Nocera 103ca96ea86SBastien Nocera /** 104ca96ea86SBastien Nocera * goodix_i2c_read - read data from a register of the i2c slave device. 105ca96ea86SBastien Nocera * 106ca96ea86SBastien Nocera * @client: i2c device. 107ca96ea86SBastien Nocera * @reg: the register to read from. 108ca96ea86SBastien Nocera * @buf: raw write data buffer. 109ca96ea86SBastien Nocera * @len: length of the buffer to write 110ca96ea86SBastien Nocera */ 111ca96ea86SBastien Nocera static int goodix_i2c_read(struct i2c_client *client, 112ca96ea86SBastien Nocera u16 reg, u8 *buf, int len) 113ca96ea86SBastien Nocera { 114ca96ea86SBastien Nocera struct i2c_msg msgs[2]; 115ca96ea86SBastien Nocera u16 wbuf = cpu_to_be16(reg); 116ca96ea86SBastien Nocera int ret; 117ca96ea86SBastien Nocera 118ca96ea86SBastien Nocera msgs[0].flags = 0; 119ca96ea86SBastien Nocera msgs[0].addr = client->addr; 120ca96ea86SBastien Nocera msgs[0].len = 2; 121ca96ea86SBastien Nocera msgs[0].buf = (u8 *)&wbuf; 122ca96ea86SBastien Nocera 123ca96ea86SBastien Nocera msgs[1].flags = I2C_M_RD; 124ca96ea86SBastien Nocera msgs[1].addr = client->addr; 125ca96ea86SBastien Nocera msgs[1].len = len; 126ca96ea86SBastien Nocera msgs[1].buf = buf; 127ca96ea86SBastien Nocera 128ca96ea86SBastien Nocera ret = i2c_transfer(client->adapter, msgs, 2); 129ca96ea86SBastien Nocera return ret < 0 ? ret : (ret != ARRAY_SIZE(msgs) ? -EIO : 0); 130ca96ea86SBastien Nocera } 131ca96ea86SBastien Nocera 13268caf858SIrina Tirdea /** 13368caf858SIrina Tirdea * goodix_i2c_write - write data to a register of the i2c slave device. 13468caf858SIrina Tirdea * 13568caf858SIrina Tirdea * @client: i2c device. 13668caf858SIrina Tirdea * @reg: the register to write to. 13768caf858SIrina Tirdea * @buf: raw data buffer to write. 13868caf858SIrina Tirdea * @len: length of the buffer to write 13968caf858SIrina Tirdea */ 14068caf858SIrina Tirdea static int goodix_i2c_write(struct i2c_client *client, u16 reg, const u8 *buf, 14168caf858SIrina Tirdea unsigned len) 14268caf858SIrina Tirdea { 14368caf858SIrina Tirdea u8 *addr_buf; 14468caf858SIrina Tirdea struct i2c_msg msg; 14568caf858SIrina Tirdea int ret; 14668caf858SIrina Tirdea 14768caf858SIrina Tirdea addr_buf = kmalloc(len + 2, GFP_KERNEL); 14868caf858SIrina Tirdea if (!addr_buf) 14968caf858SIrina Tirdea return -ENOMEM; 15068caf858SIrina Tirdea 15168caf858SIrina Tirdea addr_buf[0] = reg >> 8; 15268caf858SIrina Tirdea addr_buf[1] = reg & 0xFF; 15368caf858SIrina Tirdea memcpy(&addr_buf[2], buf, len); 15468caf858SIrina Tirdea 15568caf858SIrina Tirdea msg.flags = 0; 15668caf858SIrina Tirdea msg.addr = client->addr; 15768caf858SIrina Tirdea msg.buf = addr_buf; 15868caf858SIrina Tirdea msg.len = len + 2; 15968caf858SIrina Tirdea 16068caf858SIrina Tirdea ret = i2c_transfer(client->adapter, &msg, 1); 16168caf858SIrina Tirdea kfree(addr_buf); 16268caf858SIrina Tirdea return ret < 0 ? ret : (ret != 1 ? -EIO : 0); 16368caf858SIrina Tirdea } 16468caf858SIrina Tirdea 165a779fbc6SIrina Tirdea static int goodix_get_cfg_len(u16 id) 166a779fbc6SIrina Tirdea { 167a779fbc6SIrina Tirdea switch (id) { 168a779fbc6SIrina Tirdea case 911: 169a779fbc6SIrina Tirdea case 9271: 170a779fbc6SIrina Tirdea case 9110: 171a779fbc6SIrina Tirdea case 927: 172a779fbc6SIrina Tirdea case 928: 173a779fbc6SIrina Tirdea return GOODIX_CONFIG_911_LENGTH; 174a779fbc6SIrina Tirdea 175a779fbc6SIrina Tirdea case 912: 176a779fbc6SIrina Tirdea case 967: 177a779fbc6SIrina Tirdea return GOODIX_CONFIG_967_LENGTH; 178a779fbc6SIrina Tirdea 179a779fbc6SIrina Tirdea default: 180a779fbc6SIrina Tirdea return GOODIX_CONFIG_MAX_LENGTH; 181a779fbc6SIrina Tirdea } 182a779fbc6SIrina Tirdea } 183a779fbc6SIrina Tirdea 184ca96ea86SBastien Nocera static int goodix_ts_read_input_report(struct goodix_ts_data *ts, u8 *data) 185ca96ea86SBastien Nocera { 186ca96ea86SBastien Nocera int touch_num; 187ca96ea86SBastien Nocera int error; 188ca96ea86SBastien Nocera 189ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_READ_COOR_ADDR, data, 190ca96ea86SBastien Nocera GOODIX_CONTACT_SIZE + 1); 191ca96ea86SBastien Nocera if (error) { 192ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C transfer error: %d\n", error); 193ca96ea86SBastien Nocera return error; 194ca96ea86SBastien Nocera } 195ca96ea86SBastien Nocera 1965f6f117cSPaul Cercueil if (!(data[0] & 0x80)) 1975f6f117cSPaul Cercueil return -EAGAIN; 1985f6f117cSPaul Cercueil 199ca96ea86SBastien Nocera touch_num = data[0] & 0x0f; 200a7ac7c95SAleksei Mamlin if (touch_num > ts->max_touch_num) 201ca96ea86SBastien Nocera return -EPROTO; 202ca96ea86SBastien Nocera 203ca96ea86SBastien Nocera if (touch_num > 1) { 204ca96ea86SBastien Nocera data += 1 + GOODIX_CONTACT_SIZE; 205ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, 206ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR + 207ca96ea86SBastien Nocera 1 + GOODIX_CONTACT_SIZE, 208ca96ea86SBastien Nocera data, 209ca96ea86SBastien Nocera GOODIX_CONTACT_SIZE * (touch_num - 1)); 210ca96ea86SBastien Nocera if (error) 211ca96ea86SBastien Nocera return error; 212ca96ea86SBastien Nocera } 213ca96ea86SBastien Nocera 214ca96ea86SBastien Nocera return touch_num; 215ca96ea86SBastien Nocera } 216ca96ea86SBastien Nocera 217ca96ea86SBastien Nocera static void goodix_ts_report_touch(struct goodix_ts_data *ts, u8 *coor_data) 218ca96ea86SBastien Nocera { 219ca96ea86SBastien Nocera int id = coor_data[0] & 0x0F; 220ca96ea86SBastien Nocera int input_x = get_unaligned_le16(&coor_data[1]); 221ca96ea86SBastien Nocera int input_y = get_unaligned_le16(&coor_data[3]); 222ca96ea86SBastien Nocera int input_w = get_unaligned_le16(&coor_data[5]); 223ca96ea86SBastien Nocera 2248b5a359cSBastien Nocera if (ts->rotated_screen) { 2258b5a359cSBastien Nocera input_x = ts->abs_x_max - input_x; 2268b5a359cSBastien Nocera input_y = ts->abs_y_max - input_y; 2278b5a359cSBastien Nocera } 2288b5a359cSBastien Nocera 229ca96ea86SBastien Nocera input_mt_slot(ts->input_dev, id); 230ca96ea86SBastien Nocera input_mt_report_slot_state(ts->input_dev, MT_TOOL_FINGER, true); 231ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_X, input_x); 232ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_POSITION_Y, input_y); 233ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_TOUCH_MAJOR, input_w); 234ca96ea86SBastien Nocera input_report_abs(ts->input_dev, ABS_MT_WIDTH_MAJOR, input_w); 235ca96ea86SBastien Nocera } 236ca96ea86SBastien Nocera 237ca96ea86SBastien Nocera /** 238ca96ea86SBastien Nocera * goodix_process_events - Process incoming events 239ca96ea86SBastien Nocera * 240ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 241ca96ea86SBastien Nocera * 242ca96ea86SBastien Nocera * Called when the IRQ is triggered. Read the current device state, and push 243ca96ea86SBastien Nocera * the input events to the user space. 244ca96ea86SBastien Nocera */ 245ca96ea86SBastien Nocera static void goodix_process_events(struct goodix_ts_data *ts) 246ca96ea86SBastien Nocera { 2470e0432f0SIrina Tirdea u8 point_data[1 + GOODIX_CONTACT_SIZE * GOODIX_MAX_CONTACTS]; 248ca96ea86SBastien Nocera int touch_num; 249ca96ea86SBastien Nocera int i; 250ca96ea86SBastien Nocera 251ca96ea86SBastien Nocera touch_num = goodix_ts_read_input_report(ts, point_data); 252ca96ea86SBastien Nocera if (touch_num < 0) 253ca96ea86SBastien Nocera return; 254ca96ea86SBastien Nocera 255ca96ea86SBastien Nocera for (i = 0; i < touch_num; i++) 256ca96ea86SBastien Nocera goodix_ts_report_touch(ts, 257ca96ea86SBastien Nocera &point_data[1 + GOODIX_CONTACT_SIZE * i]); 258ca96ea86SBastien Nocera 259ca96ea86SBastien Nocera input_mt_sync_frame(ts->input_dev); 260ca96ea86SBastien Nocera input_sync(ts->input_dev); 261ca96ea86SBastien Nocera } 262ca96ea86SBastien Nocera 263ca96ea86SBastien Nocera /** 264ca96ea86SBastien Nocera * goodix_ts_irq_handler - The IRQ handler 265ca96ea86SBastien Nocera * 266ca96ea86SBastien Nocera * @irq: interrupt number. 267ca96ea86SBastien Nocera * @dev_id: private data pointer. 268ca96ea86SBastien Nocera */ 269ca96ea86SBastien Nocera static irqreturn_t goodix_ts_irq_handler(int irq, void *dev_id) 270ca96ea86SBastien Nocera { 271ca96ea86SBastien Nocera static const u8 end_cmd[] = { 272ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR >> 8, 273ca96ea86SBastien Nocera GOODIX_READ_COOR_ADDR & 0xff, 274ca96ea86SBastien Nocera 0 275ca96ea86SBastien Nocera }; 276ca96ea86SBastien Nocera struct goodix_ts_data *ts = dev_id; 277ca96ea86SBastien Nocera 278ca96ea86SBastien Nocera goodix_process_events(ts); 279ca96ea86SBastien Nocera 280ca96ea86SBastien Nocera if (i2c_master_send(ts->client, end_cmd, sizeof(end_cmd)) < 0) 281ca96ea86SBastien Nocera dev_err(&ts->client->dev, "I2C write end_cmd error\n"); 282ca96ea86SBastien Nocera 283ca96ea86SBastien Nocera return IRQ_HANDLED; 284ca96ea86SBastien Nocera } 285ca96ea86SBastien Nocera 28668caf858SIrina Tirdea /** 28768caf858SIrina Tirdea * goodix_check_cfg - Checks if config fw is valid 28868caf858SIrina Tirdea * 28968caf858SIrina Tirdea * @ts: goodix_ts_data pointer 29068caf858SIrina Tirdea * @cfg: firmware config data 29168caf858SIrina Tirdea */ 29268caf858SIrina Tirdea static int goodix_check_cfg(struct goodix_ts_data *ts, 29368caf858SIrina Tirdea const struct firmware *cfg) 29468caf858SIrina Tirdea { 29568caf858SIrina Tirdea int i, raw_cfg_len; 29668caf858SIrina Tirdea u8 check_sum = 0; 29768caf858SIrina Tirdea 29868caf858SIrina Tirdea if (cfg->size > GOODIX_CONFIG_MAX_LENGTH) { 29968caf858SIrina Tirdea dev_err(&ts->client->dev, 30068caf858SIrina Tirdea "The length of the config fw is not correct"); 30168caf858SIrina Tirdea return -EINVAL; 30268caf858SIrina Tirdea } 30368caf858SIrina Tirdea 30468caf858SIrina Tirdea raw_cfg_len = cfg->size - 2; 30568caf858SIrina Tirdea for (i = 0; i < raw_cfg_len; i++) 30668caf858SIrina Tirdea check_sum += cfg->data[i]; 30768caf858SIrina Tirdea check_sum = (~check_sum) + 1; 30868caf858SIrina Tirdea if (check_sum != cfg->data[raw_cfg_len]) { 30968caf858SIrina Tirdea dev_err(&ts->client->dev, 31068caf858SIrina Tirdea "The checksum of the config fw is not correct"); 31168caf858SIrina Tirdea return -EINVAL; 31268caf858SIrina Tirdea } 31368caf858SIrina Tirdea 31468caf858SIrina Tirdea if (cfg->data[raw_cfg_len + 1] != 1) { 31568caf858SIrina Tirdea dev_err(&ts->client->dev, 31668caf858SIrina Tirdea "Config fw must have Config_Fresh register set"); 31768caf858SIrina Tirdea return -EINVAL; 31868caf858SIrina Tirdea } 31968caf858SIrina Tirdea 32068caf858SIrina Tirdea return 0; 32168caf858SIrina Tirdea } 32268caf858SIrina Tirdea 32368caf858SIrina Tirdea /** 32468caf858SIrina Tirdea * goodix_send_cfg - Write fw config to device 32568caf858SIrina Tirdea * 32668caf858SIrina Tirdea * @ts: goodix_ts_data pointer 32768caf858SIrina Tirdea * @cfg: config firmware to write to device 32868caf858SIrina Tirdea */ 32968caf858SIrina Tirdea static int goodix_send_cfg(struct goodix_ts_data *ts, 33068caf858SIrina Tirdea const struct firmware *cfg) 33168caf858SIrina Tirdea { 33268caf858SIrina Tirdea int error; 33368caf858SIrina Tirdea 33468caf858SIrina Tirdea error = goodix_check_cfg(ts, cfg); 33568caf858SIrina Tirdea if (error) 33668caf858SIrina Tirdea return error; 33768caf858SIrina Tirdea 33868caf858SIrina Tirdea error = goodix_i2c_write(ts->client, GOODIX_REG_CONFIG_DATA, cfg->data, 33968caf858SIrina Tirdea cfg->size); 34068caf858SIrina Tirdea if (error) { 34168caf858SIrina Tirdea dev_err(&ts->client->dev, "Failed to write config data: %d", 34268caf858SIrina Tirdea error); 34368caf858SIrina Tirdea return error; 34468caf858SIrina Tirdea } 34568caf858SIrina Tirdea dev_dbg(&ts->client->dev, "Config sent successfully."); 34668caf858SIrina Tirdea 34768caf858SIrina Tirdea /* Let the firmware reconfigure itself, so sleep for 10ms */ 34868caf858SIrina Tirdea usleep_range(10000, 11000); 34968caf858SIrina Tirdea 35068caf858SIrina Tirdea return 0; 35168caf858SIrina Tirdea } 35268caf858SIrina Tirdea 353ec6e1b40SIrina Tirdea static int goodix_int_sync(struct goodix_ts_data *ts) 354ec6e1b40SIrina Tirdea { 355ec6e1b40SIrina Tirdea int error; 356ec6e1b40SIrina Tirdea 357ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, 0); 358ec6e1b40SIrina Tirdea if (error) 359ec6e1b40SIrina Tirdea return error; 360ec6e1b40SIrina Tirdea 361ec6e1b40SIrina Tirdea msleep(50); /* T5: 50ms */ 362ec6e1b40SIrina Tirdea 363ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_int); 364ec6e1b40SIrina Tirdea if (error) 365ec6e1b40SIrina Tirdea return error; 366ec6e1b40SIrina Tirdea 367ec6e1b40SIrina Tirdea return 0; 368ec6e1b40SIrina Tirdea } 369ec6e1b40SIrina Tirdea 370ec6e1b40SIrina Tirdea /** 371ec6e1b40SIrina Tirdea * goodix_reset - Reset device during power on 372ec6e1b40SIrina Tirdea * 373ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 374ec6e1b40SIrina Tirdea */ 375ec6e1b40SIrina Tirdea static int goodix_reset(struct goodix_ts_data *ts) 376ec6e1b40SIrina Tirdea { 377ec6e1b40SIrina Tirdea int error; 378ec6e1b40SIrina Tirdea 379ec6e1b40SIrina Tirdea /* begin select I2C slave addr */ 380ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 0); 381ec6e1b40SIrina Tirdea if (error) 382ec6e1b40SIrina Tirdea return error; 383ec6e1b40SIrina Tirdea 384ec6e1b40SIrina Tirdea msleep(20); /* T2: > 10ms */ 385ec6e1b40SIrina Tirdea 386ec6e1b40SIrina Tirdea /* HIGH: 0x28/0x29, LOW: 0xBA/0xBB */ 387ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_int, ts->client->addr == 0x14); 388ec6e1b40SIrina Tirdea if (error) 389ec6e1b40SIrina Tirdea return error; 390ec6e1b40SIrina Tirdea 391ec6e1b40SIrina Tirdea usleep_range(100, 2000); /* T3: > 100us */ 392ec6e1b40SIrina Tirdea 393ec6e1b40SIrina Tirdea error = gpiod_direction_output(ts->gpiod_rst, 1); 394ec6e1b40SIrina Tirdea if (error) 395ec6e1b40SIrina Tirdea return error; 396ec6e1b40SIrina Tirdea 397ec6e1b40SIrina Tirdea usleep_range(6000, 10000); /* T4: > 5ms */ 398ec6e1b40SIrina Tirdea 399ec6e1b40SIrina Tirdea /* end select I2C slave addr */ 400ec6e1b40SIrina Tirdea error = gpiod_direction_input(ts->gpiod_rst); 401ec6e1b40SIrina Tirdea if (error) 402ec6e1b40SIrina Tirdea return error; 403ec6e1b40SIrina Tirdea 404ec6e1b40SIrina Tirdea error = goodix_int_sync(ts); 405ec6e1b40SIrina Tirdea if (error) 406ec6e1b40SIrina Tirdea return error; 407ec6e1b40SIrina Tirdea 408ec6e1b40SIrina Tirdea return 0; 409ec6e1b40SIrina Tirdea } 410ec6e1b40SIrina Tirdea 411ec6e1b40SIrina Tirdea /** 412ec6e1b40SIrina Tirdea * goodix_get_gpio_config - Get GPIO config from ACPI/DT 413ec6e1b40SIrina Tirdea * 414ec6e1b40SIrina Tirdea * @ts: goodix_ts_data pointer 415ec6e1b40SIrina Tirdea */ 416ec6e1b40SIrina Tirdea static int goodix_get_gpio_config(struct goodix_ts_data *ts) 417ec6e1b40SIrina Tirdea { 418ec6e1b40SIrina Tirdea int error; 419ec6e1b40SIrina Tirdea struct device *dev; 420ec6e1b40SIrina Tirdea struct gpio_desc *gpiod; 421ec6e1b40SIrina Tirdea 422ec6e1b40SIrina Tirdea if (!ts->client) 423ec6e1b40SIrina Tirdea return -EINVAL; 424ec6e1b40SIrina Tirdea dev = &ts->client->dev; 425ec6e1b40SIrina Tirdea 426ec6e1b40SIrina Tirdea /* Get the interrupt GPIO pin number */ 427ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_INT_NAME, GPIOD_IN); 428ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 429ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 430ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 431ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 432ec6e1b40SIrina Tirdea GOODIX_GPIO_INT_NAME, error); 433ec6e1b40SIrina Tirdea return error; 434ec6e1b40SIrina Tirdea } 435ec6e1b40SIrina Tirdea 436ec6e1b40SIrina Tirdea ts->gpiod_int = gpiod; 437ec6e1b40SIrina Tirdea 438ec6e1b40SIrina Tirdea /* Get the reset line GPIO pin number */ 439ec6e1b40SIrina Tirdea gpiod = devm_gpiod_get_optional(dev, GOODIX_GPIO_RST_NAME, GPIOD_IN); 440ec6e1b40SIrina Tirdea if (IS_ERR(gpiod)) { 441ec6e1b40SIrina Tirdea error = PTR_ERR(gpiod); 442ec6e1b40SIrina Tirdea if (error != -EPROBE_DEFER) 443ec6e1b40SIrina Tirdea dev_dbg(dev, "Failed to get %s GPIO: %d\n", 444ec6e1b40SIrina Tirdea GOODIX_GPIO_RST_NAME, error); 445ec6e1b40SIrina Tirdea return error; 446ec6e1b40SIrina Tirdea } 447ec6e1b40SIrina Tirdea 448ec6e1b40SIrina Tirdea ts->gpiod_rst = gpiod; 449ec6e1b40SIrina Tirdea 450ec6e1b40SIrina Tirdea return 0; 451ec6e1b40SIrina Tirdea } 452ec6e1b40SIrina Tirdea 453ca96ea86SBastien Nocera /** 454ca96ea86SBastien Nocera * goodix_read_config - Read the embedded configuration of the panel 455ca96ea86SBastien Nocera * 456ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 457ca96ea86SBastien Nocera * 458ca96ea86SBastien Nocera * Must be called during probe 459ca96ea86SBastien Nocera */ 460ca96ea86SBastien Nocera static void goodix_read_config(struct goodix_ts_data *ts) 461ca96ea86SBastien Nocera { 462ca96ea86SBastien Nocera u8 config[GOODIX_CONFIG_MAX_LENGTH]; 463ca96ea86SBastien Nocera int error; 464ca96ea86SBastien Nocera 465ca96ea86SBastien Nocera error = goodix_i2c_read(ts->client, GOODIX_REG_CONFIG_DATA, 466a779fbc6SIrina Tirdea config, ts->cfg_len); 467ca96ea86SBastien Nocera if (error) { 468ca96ea86SBastien Nocera dev_warn(&ts->client->dev, 469ca96ea86SBastien Nocera "Error reading config (%d), using defaults\n", 470ca96ea86SBastien Nocera error); 471ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 472ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 473ca96ea86SBastien Nocera ts->int_trigger_type = GOODIX_INT_TRIGGER; 474a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 475ca96ea86SBastien Nocera return; 476ca96ea86SBastien Nocera } 477ca96ea86SBastien Nocera 478ca96ea86SBastien Nocera ts->abs_x_max = get_unaligned_le16(&config[RESOLUTION_LOC]); 479ca96ea86SBastien Nocera ts->abs_y_max = get_unaligned_le16(&config[RESOLUTION_LOC + 2]); 480a7ac7c95SAleksei Mamlin ts->int_trigger_type = config[TRIGGER_LOC] & 0x03; 481a7ac7c95SAleksei Mamlin ts->max_touch_num = config[MAX_CONTACTS_LOC] & 0x0f; 482a7ac7c95SAleksei Mamlin if (!ts->abs_x_max || !ts->abs_y_max || !ts->max_touch_num) { 483ca96ea86SBastien Nocera dev_err(&ts->client->dev, 484ca96ea86SBastien Nocera "Invalid config, using defaults\n"); 485ca96ea86SBastien Nocera ts->abs_x_max = GOODIX_MAX_WIDTH; 486ca96ea86SBastien Nocera ts->abs_y_max = GOODIX_MAX_HEIGHT; 487a7ac7c95SAleksei Mamlin ts->max_touch_num = GOODIX_MAX_CONTACTS; 488ca96ea86SBastien Nocera } 4898b5a359cSBastien Nocera 4908b5a359cSBastien Nocera ts->rotated_screen = dmi_check_system(rotated_screen); 4918b5a359cSBastien Nocera if (ts->rotated_screen) 4928b5a359cSBastien Nocera dev_dbg(&ts->client->dev, 4938b5a359cSBastien Nocera "Applying '180 degrees rotated screen' quirk\n"); 494ca96ea86SBastien Nocera } 495ca96ea86SBastien Nocera 496ca96ea86SBastien Nocera /** 497ca96ea86SBastien Nocera * goodix_read_version - Read goodix touchscreen version 498ca96ea86SBastien Nocera * 49968caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 500ca96ea86SBastien Nocera */ 50168caf858SIrina Tirdea static int goodix_read_version(struct goodix_ts_data *ts) 502ca96ea86SBastien Nocera { 503ca96ea86SBastien Nocera int error; 504ca96ea86SBastien Nocera u8 buf[6]; 505e70b0307SIrina Tirdea char id_str[5]; 506ca96ea86SBastien Nocera 50768caf858SIrina Tirdea error = goodix_i2c_read(ts->client, GOODIX_REG_ID, buf, sizeof(buf)); 508ca96ea86SBastien Nocera if (error) { 50968caf858SIrina Tirdea dev_err(&ts->client->dev, "read version failed: %d\n", error); 510ca96ea86SBastien Nocera return error; 511ca96ea86SBastien Nocera } 512ca96ea86SBastien Nocera 513e70b0307SIrina Tirdea memcpy(id_str, buf, 4); 514e70b0307SIrina Tirdea id_str[4] = 0; 51568caf858SIrina Tirdea if (kstrtou16(id_str, 10, &ts->id)) 51668caf858SIrina Tirdea ts->id = 0x1001; 517e70b0307SIrina Tirdea 51868caf858SIrina Tirdea ts->version = get_unaligned_le16(&buf[4]); 519ca96ea86SBastien Nocera 52068caf858SIrina Tirdea dev_info(&ts->client->dev, "ID %d, version: %04x\n", ts->id, 52168caf858SIrina Tirdea ts->version); 522ca96ea86SBastien Nocera 523ca96ea86SBastien Nocera return 0; 524ca96ea86SBastien Nocera } 525ca96ea86SBastien Nocera 526ca96ea86SBastien Nocera /** 527ca96ea86SBastien Nocera * goodix_i2c_test - I2C test function to check if the device answers. 528ca96ea86SBastien Nocera * 529ca96ea86SBastien Nocera * @client: the i2c client 530ca96ea86SBastien Nocera */ 531ca96ea86SBastien Nocera static int goodix_i2c_test(struct i2c_client *client) 532ca96ea86SBastien Nocera { 533ca96ea86SBastien Nocera int retry = 0; 534ca96ea86SBastien Nocera int error; 535ca96ea86SBastien Nocera u8 test; 536ca96ea86SBastien Nocera 537ca96ea86SBastien Nocera while (retry++ < 2) { 538ca96ea86SBastien Nocera error = goodix_i2c_read(client, GOODIX_REG_CONFIG_DATA, 539ca96ea86SBastien Nocera &test, 1); 540ca96ea86SBastien Nocera if (!error) 541ca96ea86SBastien Nocera return 0; 542ca96ea86SBastien Nocera 543ca96ea86SBastien Nocera dev_err(&client->dev, "i2c test failed attempt %d: %d\n", 544ca96ea86SBastien Nocera retry, error); 545ca96ea86SBastien Nocera msleep(20); 546ca96ea86SBastien Nocera } 547ca96ea86SBastien Nocera 548ca96ea86SBastien Nocera return error; 549ca96ea86SBastien Nocera } 550ca96ea86SBastien Nocera 551ca96ea86SBastien Nocera /** 552ca96ea86SBastien Nocera * goodix_request_input_dev - Allocate, populate and register the input device 553ca96ea86SBastien Nocera * 554ca96ea86SBastien Nocera * @ts: our goodix_ts_data pointer 555ca96ea86SBastien Nocera * 556ca96ea86SBastien Nocera * Must be called during probe 557ca96ea86SBastien Nocera */ 55868caf858SIrina Tirdea static int goodix_request_input_dev(struct goodix_ts_data *ts) 559ca96ea86SBastien Nocera { 560ca96ea86SBastien Nocera int error; 561ca96ea86SBastien Nocera 562ca96ea86SBastien Nocera ts->input_dev = devm_input_allocate_device(&ts->client->dev); 563ca96ea86SBastien Nocera if (!ts->input_dev) { 564ca96ea86SBastien Nocera dev_err(&ts->client->dev, "Failed to allocate input device."); 565ca96ea86SBastien Nocera return -ENOMEM; 566ca96ea86SBastien Nocera } 567ca96ea86SBastien Nocera 5680dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_X, 5690dfb35bdSIrina Tirdea 0, ts->abs_x_max, 0, 0); 5700dfb35bdSIrina Tirdea input_set_abs_params(ts->input_dev, ABS_MT_POSITION_Y, 5710dfb35bdSIrina Tirdea 0, ts->abs_y_max, 0, 0); 572ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0); 573ca96ea86SBastien Nocera input_set_abs_params(ts->input_dev, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0); 574ca96ea86SBastien Nocera 575a7ac7c95SAleksei Mamlin input_mt_init_slots(ts->input_dev, ts->max_touch_num, 576ca96ea86SBastien Nocera INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED); 577ca96ea86SBastien Nocera 578ca96ea86SBastien Nocera ts->input_dev->name = "Goodix Capacitive TouchScreen"; 579ca96ea86SBastien Nocera ts->input_dev->phys = "input/ts"; 580ca96ea86SBastien Nocera ts->input_dev->id.bustype = BUS_I2C; 581ca96ea86SBastien Nocera ts->input_dev->id.vendor = 0x0416; 58268caf858SIrina Tirdea ts->input_dev->id.product = ts->id; 58368caf858SIrina Tirdea ts->input_dev->id.version = ts->version; 584ca96ea86SBastien Nocera 585ca96ea86SBastien Nocera error = input_register_device(ts->input_dev); 586ca96ea86SBastien Nocera if (error) { 587ca96ea86SBastien Nocera dev_err(&ts->client->dev, 588ca96ea86SBastien Nocera "Failed to register input device: %d", error); 589ca96ea86SBastien Nocera return error; 590ca96ea86SBastien Nocera } 591ca96ea86SBastien Nocera 592ca96ea86SBastien Nocera return 0; 593ca96ea86SBastien Nocera } 594ca96ea86SBastien Nocera 59568caf858SIrina Tirdea /** 59668caf858SIrina Tirdea * goodix_configure_dev - Finish device initialization 59768caf858SIrina Tirdea * 59868caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 59968caf858SIrina Tirdea * 60068caf858SIrina Tirdea * Must be called from probe to finish initialization of the device. 60168caf858SIrina Tirdea * Contains the common initialization code for both devices that 60268caf858SIrina Tirdea * declare gpio pins and devices that do not. It is either called 60368caf858SIrina Tirdea * directly from probe or from request_firmware_wait callback. 60468caf858SIrina Tirdea */ 60568caf858SIrina Tirdea static int goodix_configure_dev(struct goodix_ts_data *ts) 60668caf858SIrina Tirdea { 60768caf858SIrina Tirdea int error; 60868caf858SIrina Tirdea unsigned long irq_flags; 60968caf858SIrina Tirdea 61068caf858SIrina Tirdea goodix_read_config(ts); 61168caf858SIrina Tirdea 61268caf858SIrina Tirdea error = goodix_request_input_dev(ts); 61368caf858SIrina Tirdea if (error) 61468caf858SIrina Tirdea return error; 61568caf858SIrina Tirdea 61668caf858SIrina Tirdea irq_flags = goodix_irq_flags[ts->int_trigger_type] | IRQF_ONESHOT; 61768caf858SIrina Tirdea error = devm_request_threaded_irq(&ts->client->dev, ts->client->irq, 61868caf858SIrina Tirdea NULL, goodix_ts_irq_handler, 61968caf858SIrina Tirdea irq_flags, ts->client->name, ts); 62068caf858SIrina Tirdea if (error) { 62168caf858SIrina Tirdea dev_err(&ts->client->dev, "request IRQ failed: %d\n", error); 62268caf858SIrina Tirdea return error; 62368caf858SIrina Tirdea } 62468caf858SIrina Tirdea 62568caf858SIrina Tirdea return 0; 62668caf858SIrina Tirdea } 62768caf858SIrina Tirdea 62868caf858SIrina Tirdea /** 62968caf858SIrina Tirdea * goodix_config_cb - Callback to finish device init 63068caf858SIrina Tirdea * 63168caf858SIrina Tirdea * @ts: our goodix_ts_data pointer 63268caf858SIrina Tirdea * 63368caf858SIrina Tirdea * request_firmware_wait callback that finishes 63468caf858SIrina Tirdea * initialization of the device. 63568caf858SIrina Tirdea */ 63668caf858SIrina Tirdea static void goodix_config_cb(const struct firmware *cfg, void *ctx) 63768caf858SIrina Tirdea { 63868caf858SIrina Tirdea struct goodix_ts_data *ts = ctx; 63968caf858SIrina Tirdea int error; 64068caf858SIrina Tirdea 64168caf858SIrina Tirdea if (cfg) { 64268caf858SIrina Tirdea /* send device configuration to the firmware */ 64368caf858SIrina Tirdea error = goodix_send_cfg(ts, cfg); 64468caf858SIrina Tirdea if (error) 64568caf858SIrina Tirdea goto err_release_cfg; 64668caf858SIrina Tirdea } 64768caf858SIrina Tirdea 64868caf858SIrina Tirdea goodix_configure_dev(ts); 64968caf858SIrina Tirdea 65068caf858SIrina Tirdea err_release_cfg: 65168caf858SIrina Tirdea release_firmware(cfg); 65268caf858SIrina Tirdea complete_all(&ts->firmware_loading_complete); 65368caf858SIrina Tirdea } 65468caf858SIrina Tirdea 655ca96ea86SBastien Nocera static int goodix_ts_probe(struct i2c_client *client, 656ca96ea86SBastien Nocera const struct i2c_device_id *id) 657ca96ea86SBastien Nocera { 658ca96ea86SBastien Nocera struct goodix_ts_data *ts; 659ca96ea86SBastien Nocera int error; 660ca96ea86SBastien Nocera 661ca96ea86SBastien Nocera dev_dbg(&client->dev, "I2C Address: 0x%02x\n", client->addr); 662ca96ea86SBastien Nocera 663ca96ea86SBastien Nocera if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) { 664ca96ea86SBastien Nocera dev_err(&client->dev, "I2C check functionality failed.\n"); 665ca96ea86SBastien Nocera return -ENXIO; 666ca96ea86SBastien Nocera } 667ca96ea86SBastien Nocera 668ca96ea86SBastien Nocera ts = devm_kzalloc(&client->dev, sizeof(*ts), GFP_KERNEL); 669ca96ea86SBastien Nocera if (!ts) 670ca96ea86SBastien Nocera return -ENOMEM; 671ca96ea86SBastien Nocera 672ca96ea86SBastien Nocera ts->client = client; 673ca96ea86SBastien Nocera i2c_set_clientdata(client, ts); 67468caf858SIrina Tirdea init_completion(&ts->firmware_loading_complete); 675ca96ea86SBastien Nocera 676ec6e1b40SIrina Tirdea error = goodix_get_gpio_config(ts); 677ec6e1b40SIrina Tirdea if (error) 678ec6e1b40SIrina Tirdea return error; 679ec6e1b40SIrina Tirdea 680ec6e1b40SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 681ec6e1b40SIrina Tirdea /* reset the controller */ 682ec6e1b40SIrina Tirdea error = goodix_reset(ts); 683ec6e1b40SIrina Tirdea if (error) { 684ec6e1b40SIrina Tirdea dev_err(&client->dev, "Controller reset failed.\n"); 685ec6e1b40SIrina Tirdea return error; 686ec6e1b40SIrina Tirdea } 687ec6e1b40SIrina Tirdea } 688ec6e1b40SIrina Tirdea 689ca96ea86SBastien Nocera error = goodix_i2c_test(client); 690ca96ea86SBastien Nocera if (error) { 691ca96ea86SBastien Nocera dev_err(&client->dev, "I2C communication failure: %d\n", error); 692ca96ea86SBastien Nocera return error; 693ca96ea86SBastien Nocera } 694ca96ea86SBastien Nocera 69568caf858SIrina Tirdea error = goodix_read_version(ts); 696ca96ea86SBastien Nocera if (error) { 697ca96ea86SBastien Nocera dev_err(&client->dev, "Read version failed.\n"); 698ca96ea86SBastien Nocera return error; 699ca96ea86SBastien Nocera } 700ca96ea86SBastien Nocera 70168caf858SIrina Tirdea ts->cfg_len = goodix_get_cfg_len(ts->id); 702a779fbc6SIrina Tirdea 70368caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) { 70468caf858SIrina Tirdea /* update device config */ 70568caf858SIrina Tirdea ts->cfg_name = devm_kasprintf(&client->dev, GFP_KERNEL, 70668caf858SIrina Tirdea "goodix_%d_cfg.bin", ts->id); 70768caf858SIrina Tirdea if (!ts->cfg_name) 70868caf858SIrina Tirdea return -ENOMEM; 709ca96ea86SBastien Nocera 71068caf858SIrina Tirdea error = request_firmware_nowait(THIS_MODULE, true, ts->cfg_name, 71168caf858SIrina Tirdea &client->dev, GFP_KERNEL, ts, 71268caf858SIrina Tirdea goodix_config_cb); 713ca96ea86SBastien Nocera if (error) { 71468caf858SIrina Tirdea dev_err(&client->dev, 71568caf858SIrina Tirdea "Failed to invoke firmware loader: %d\n", 71668caf858SIrina Tirdea error); 717ca96ea86SBastien Nocera return error; 718ca96ea86SBastien Nocera } 719ca96ea86SBastien Nocera 720ca96ea86SBastien Nocera return 0; 72168caf858SIrina Tirdea } else { 72268caf858SIrina Tirdea error = goodix_configure_dev(ts); 72368caf858SIrina Tirdea if (error) 72468caf858SIrina Tirdea return error; 72568caf858SIrina Tirdea } 72668caf858SIrina Tirdea 72768caf858SIrina Tirdea return 0; 72868caf858SIrina Tirdea } 72968caf858SIrina Tirdea 73068caf858SIrina Tirdea static int goodix_ts_remove(struct i2c_client *client) 73168caf858SIrina Tirdea { 73268caf858SIrina Tirdea struct goodix_ts_data *ts = i2c_get_clientdata(client); 73368caf858SIrina Tirdea 73468caf858SIrina Tirdea if (ts->gpiod_int && ts->gpiod_rst) 73568caf858SIrina Tirdea wait_for_completion(&ts->firmware_loading_complete); 73668caf858SIrina Tirdea 73768caf858SIrina Tirdea return 0; 738ca96ea86SBastien Nocera } 739ca96ea86SBastien Nocera 740ca96ea86SBastien Nocera static const struct i2c_device_id goodix_ts_id[] = { 741ca96ea86SBastien Nocera { "GDIX1001:00", 0 }, 742ca96ea86SBastien Nocera { } 743ca96ea86SBastien Nocera }; 7442e9e910eSJavier Martinez Canillas MODULE_DEVICE_TABLE(i2c, goodix_ts_id); 745ca96ea86SBastien Nocera 746771d8f1bSAleksei Mamlin #ifdef CONFIG_ACPI 747ca96ea86SBastien Nocera static const struct acpi_device_id goodix_acpi_match[] = { 748ca96ea86SBastien Nocera { "GDIX1001", 0 }, 749ca96ea86SBastien Nocera { } 750ca96ea86SBastien Nocera }; 751ca96ea86SBastien Nocera MODULE_DEVICE_TABLE(acpi, goodix_acpi_match); 752771d8f1bSAleksei Mamlin #endif 753771d8f1bSAleksei Mamlin 754771d8f1bSAleksei Mamlin #ifdef CONFIG_OF 755771d8f1bSAleksei Mamlin static const struct of_device_id goodix_of_match[] = { 756771d8f1bSAleksei Mamlin { .compatible = "goodix,gt911" }, 757771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9110" }, 758771d8f1bSAleksei Mamlin { .compatible = "goodix,gt912" }, 759771d8f1bSAleksei Mamlin { .compatible = "goodix,gt927" }, 760771d8f1bSAleksei Mamlin { .compatible = "goodix,gt9271" }, 761771d8f1bSAleksei Mamlin { .compatible = "goodix,gt928" }, 762771d8f1bSAleksei Mamlin { .compatible = "goodix,gt967" }, 763771d8f1bSAleksei Mamlin { } 764771d8f1bSAleksei Mamlin }; 765771d8f1bSAleksei Mamlin MODULE_DEVICE_TABLE(of, goodix_of_match); 766771d8f1bSAleksei Mamlin #endif 767ca96ea86SBastien Nocera 768ca96ea86SBastien Nocera static struct i2c_driver goodix_ts_driver = { 769ca96ea86SBastien Nocera .probe = goodix_ts_probe, 77068caf858SIrina Tirdea .remove = goodix_ts_remove, 771ca96ea86SBastien Nocera .id_table = goodix_ts_id, 772ca96ea86SBastien Nocera .driver = { 773ca96ea86SBastien Nocera .name = "Goodix-TS", 774771d8f1bSAleksei Mamlin .acpi_match_table = ACPI_PTR(goodix_acpi_match), 775771d8f1bSAleksei Mamlin .of_match_table = of_match_ptr(goodix_of_match), 776ca96ea86SBastien Nocera }, 777ca96ea86SBastien Nocera }; 778ca96ea86SBastien Nocera module_i2c_driver(goodix_ts_driver); 779ca96ea86SBastien Nocera 780ca96ea86SBastien Nocera MODULE_AUTHOR("Benjamin Tissoires <benjamin.tissoires@gmail.com>"); 781ca96ea86SBastien Nocera MODULE_AUTHOR("Bastien Nocera <hadess@hadess.net>"); 782ca96ea86SBastien Nocera MODULE_DESCRIPTION("Goodix touchscreen driver"); 783ca96ea86SBastien Nocera MODULE_LICENSE("GPL v2"); 784