^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Driver for EETI eGalax Multiple Touch Controller
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * Copyright (C) 2011 Freescale Semiconductor, Inc.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * based on max11801_ts.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) /* EETI eGalax serial touch screen controller is a I2C based multiple
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * touch screen controller, it supports 5 point multiple touch. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) /* TODO:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) - auto idle mode support
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <linux/input.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <linux/irq.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <linux/gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) #include <linux/bitops.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #include <linux/input/mt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #include <linux/of_gpio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) * Mouse Mode: some panel may configure the controller to mouse mode,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * which can only report one point at a given time.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * This driver will ignore events in this mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #define REPORT_MODE_MOUSE 0x1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * Vendor Mode: this mode is used to transfer some vendor specific
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) * messages.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * This driver will ignore events in this mode.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) #define REPORT_MODE_VENDOR 0x3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) /* Multiple Touch Mode */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #define REPORT_MODE_MTTOUCH 0x4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define MAX_SUPPORT_POINTS 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define EVENT_VALID_OFFSET 7
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define EVENT_VALID_MASK (0x1 << EVENT_VALID_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) #define EVENT_ID_OFFSET 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) #define EVENT_ID_MASK (0xf << EVENT_ID_OFFSET)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) #define EVENT_IN_RANGE (0x1 << 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) #define EVENT_DOWN_UP (0X1 << 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) #define MAX_I2C_DATA_LEN 10
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) #define EGALAX_MAX_X 32760
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) #define EGALAX_MAX_Y 32760
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) #define EGALAX_MAX_TRIES 100
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) struct egalax_ts {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) struct i2c_client *client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) struct egalax_ts *ts = dev_id;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct input_dev *input_dev = ts->input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) struct i2c_client *client = ts->client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) u8 buf[MAX_I2C_DATA_LEN];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) int id, ret, x, y, z;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) int tries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) bool down, valid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) u8 state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) ret = i2c_master_recv(client, buf, MAX_I2C_DATA_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) } while (ret == -EAGAIN && tries++ < EGALAX_MAX_TRIES);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (buf[0] != REPORT_MODE_MTTOUCH) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) /* ignore mouse events and vendor events */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) state = buf[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) x = (buf[3] << 8) | buf[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) y = (buf[5] << 8) | buf[4];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) z = (buf[7] << 8) | buf[6];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) valid = state & EVENT_VALID_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) id = (state & EVENT_ID_MASK) >> EVENT_ID_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) down = state & EVENT_DOWN_UP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) if (!valid || id > MAX_SUPPORT_POINTS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) dev_dbg(&client->dev, "point invalid\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) input_mt_slot(input_dev, id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) input_mt_report_slot_state(input_dev, MT_TOOL_FINGER, down);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) dev_dbg(&client->dev, "%s id:%d x:%d y:%d z:%d",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) down ? "down" : "up", id, x, y, z);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) if (down) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) input_report_abs(input_dev, ABS_MT_POSITION_X, x);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) input_report_abs(input_dev, ABS_MT_POSITION_Y, y);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) input_report_abs(input_dev, ABS_MT_PRESSURE, z);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) input_mt_report_pointer_emulation(input_dev, true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) input_sync(input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) /* wake up controller by an falling edge of interrupt gpio. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static int egalax_wake_up_device(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) struct device_node *np = client->dev.of_node;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) int gpio;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) if (!np)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) gpio = of_get_named_gpio(np, "wakeup-gpios", 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) if (!gpio_is_valid(gpio))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) ret = gpio_request(gpio, "egalax_irq");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) dev_err(&client->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) "request gpio failed, cannot wake up controller: %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) ret);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) /* wake up controller via an falling edge on IRQ gpio. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) gpio_direction_output(gpio, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) gpio_set_value(gpio, 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) /* controller should be waken up, return irq. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) gpio_direction_input(gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) gpio_free(gpio);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static int egalax_firmware_version(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) static const u8 cmd[MAX_I2C_DATA_LEN] = { 0x03, 0x03, 0xa, 0x01, 0x41 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ret = i2c_master_send(client, cmd, MAX_I2C_DATA_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) static int egalax_ts_probe(struct i2c_client *client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) struct egalax_ts *ts;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) struct input_dev *input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) int error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) ts = devm_kzalloc(&client->dev, sizeof(struct egalax_ts), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) if (!ts) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) dev_err(&client->dev, "Failed to allocate memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) input_dev = devm_input_allocate_device(&client->dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) if (!input_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) dev_err(&client->dev, "Failed to allocate memory\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) ts->client = client;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ts->input_dev = input_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) /* controller may be in sleep, wake it up. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) error = egalax_wake_up_device(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) if (error) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) dev_err(&client->dev, "Failed to wake up the controller\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) error = egalax_firmware_version(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) dev_err(&client->dev, "Failed to read firmware version\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) input_dev->name = "EETI eGalax Touch Screen";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) input_dev->id.bustype = BUS_I2C;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) __set_bit(EV_ABS, input_dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) __set_bit(EV_KEY, input_dev->evbit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) __set_bit(BTN_TOUCH, input_dev->keybit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) input_set_abs_params(input_dev, ABS_X, 0, EGALAX_MAX_X, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) input_set_abs_params(input_dev, ABS_Y, 0, EGALAX_MAX_Y, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) input_set_abs_params(input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) ABS_MT_POSITION_X, 0, EGALAX_MAX_X, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) input_set_abs_params(input_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) ABS_MT_POSITION_Y, 0, EGALAX_MAX_Y, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) input_mt_init_slots(input_dev, MAX_SUPPORT_POINTS, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) error = devm_request_threaded_irq(&client->dev, client->irq, NULL,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) egalax_ts_interrupt,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) IRQF_TRIGGER_LOW | IRQF_ONESHOT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) "egalax_ts", ts);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) if (error < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) dev_err(&client->dev, "Failed to register interrupt\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) error = input_register_device(ts->input_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if (error)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) return error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) static const struct i2c_device_id egalax_ts_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) { "egalax_ts", 0 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) MODULE_DEVICE_TABLE(i2c, egalax_ts_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) static int __maybe_unused egalax_ts_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static const u8 suspend_cmd[MAX_I2C_DATA_LEN] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 0x3, 0x6, 0xa, 0x3, 0x36, 0x3f, 0x2, 0, 0, 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) return enable_irq_wake(client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) ret = i2c_master_send(client, suspend_cmd, MAX_I2C_DATA_LEN);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) return ret > 0 ? 0 : ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) static int __maybe_unused egalax_ts_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) struct i2c_client *client = to_i2c_client(dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (device_may_wakeup(dev))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) return disable_irq_wake(client->irq);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) return egalax_wake_up_device(client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) static SIMPLE_DEV_PM_OPS(egalax_ts_pm_ops, egalax_ts_suspend, egalax_ts_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) static const struct of_device_id egalax_ts_dt_ids[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) { .compatible = "eeti,egalax_ts" },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) { /* sentinel */ }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) MODULE_DEVICE_TABLE(of, egalax_ts_dt_ids);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) static struct i2c_driver egalax_ts_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) .name = "egalax_ts",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) .pm = &egalax_ts_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) .of_match_table = egalax_ts_dt_ids,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) .id_table = egalax_ts_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) .probe = egalax_ts_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) module_i2c_driver(egalax_ts_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) MODULE_AUTHOR("Freescale Semiconductor, Inc.");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) MODULE_DESCRIPTION("Touchscreen driver for EETI eGalax touch controller");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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