Add support for ILITEK Lego series of touch devices.
Lego series includes ILITEK 213X/23XX/25XX.
Tested and passed with evaluation board with ILI2520 IC.
Signed-off-by: Joe Hung <joe_hung@xxxxxxxxxx>
---
Changes in v4:
- Remove unused inlcude header file
- Remove parenthesis for scalar values
- Place to use standard macro DIV_ROUND_UP
- Remove unused/unrequired member of struct
- Remove retries when I2C transfer
- Remove irq_disable/enable wrapper
- Remove key handler
- Adjust to use get_unaligned_le16/be16
- Modify ilitek_reset() to leave reset gpio in-active finally
- Remove null check for input argument that should not happen
- Modify return value for read_tp_info()
- Modify to use common touchscreen_* api
- Add error handling for input_mt_init_slots
- Modify input flag for irq request, and parse it from ACPI/DTS
- Return stored value instead of querying via I2C in *_show api
- Modify to use devm_* APIs and get rid of remove api
- Add PM (suspend/resume) handling
Changes in v3:
- None
Changes in v2:
- Remove irq-gpio and related flow
drivers/input/touchscreen/Kconfig | 12 +
drivers/input/touchscreen/Makefile | 1 +
drivers/input/touchscreen/ilitek_ts_i2c.c | 761 ++++++++++++++++++++++
3 files changed, 774 insertions(+)
create mode 100644 drivers/input/touchscreen/ilitek_ts_i2c.c
diff --git a/drivers/input/touchscreen/Kconfig b/drivers/input/touchscreen/Kconfig
index f012fe746df0..03a16852d4bc 100644
--- a/drivers/input/touchscreen/Kconfig
+++ b/drivers/input/touchscreen/Kconfig
@@ -1334,4 +1334,16 @@ config TOUCHSCREEN_ZINITIX
To compile this driver as a module, choose M here: the
module will be called zinitix.
+config TOUCHSCREEN_ILITEK
+ tristate "Ilitek I2C 213X/23XX/25XX/Lego Series Touch ICs"
+ depends on I2C
+ help
+ Say Y here if you have touchscreen with ILITEK touch IC,
+ it supports 213X/23XX/25XX and other Lego series.
+
+ If unsure, say N.
+
+ To compile this driver as a module, choose M here: the
+ module will be called ilitek_ts_i2c.
+
endif
diff --git a/drivers/input/touchscreen/Makefile b/drivers/input/touchscreen/Makefile
index 6233541e9173..6749bdc42f41 100644
--- a/drivers/input/touchscreen/Makefile
+++ b/drivers/input/touchscreen/Makefile
@@ -112,3 +112,4 @@ obj-$(CONFIG_TOUCHSCREEN_ROHM_BU21023) += rohm_bu21023.o
obj-$(CONFIG_TOUCHSCREEN_RASPBERRYPI_FW) += raspberrypi-ts.o
obj-$(CONFIG_TOUCHSCREEN_IQS5XX) += iqs5xx.o
obj-$(CONFIG_TOUCHSCREEN_ZINITIX) += zinitix.o
+obj-$(CONFIG_TOUCHSCREEN_ILITEK) += ilitek_ts_i2c.o
diff --git a/drivers/input/touchscreen/ilitek_ts_i2c.c b/drivers/input/touchscreen/ilitek_ts_i2c.c
new file mode 100644
index 000000000000..54c95a090b62
--- /dev/null
+++ b/drivers/input/touchscreen/ilitek_ts_i2c.c
@@ -0,0 +1,761 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ILITEK Touch IC driver for 23XX, 25XX and Lego series
+ *
+ * Copyright (C) 2011 ILI Technology Corporation.
+ * Copyright (C) 2020 Luca Hsu <luca_hsu@xxxxxxxxxx>
+ * Copyright (C) 2021 Joe Hung <joe_hung@xxxxxxxxxx>
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+#include <linux/interrupt.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/errno.h>
+#include <linux/acpi.h>
+#include <linux/input/touchscreen.h>
+#include <asm/unaligned.h>
+
+
+#define ILITEK_TS_NAME "ilitek_ts"
+#define BL_V1_8 0x108
+#define BL_V1_7 0x107
+#define BL_V1_6 0x106
+
+#define ILITEK_TP_CMD_GET_TP_RES 0x20
+#define ILITEK_TP_CMD_GET_SCRN_RES 0x21
+#define ILITEK_TP_CMD_SET_IC_SLEEP 0x30
+#define ILITEK_TP_CMD_SET_IC_WAKE 0x31
+#define ILITEK_TP_CMD_GET_FW_VER 0x40
+#define ILITEK_TP_CMD_GET_PRL_VER 0x42
+#define ILITEK_TP_CMD_GET_MCU_VER 0x61
+#define ILITEK_TP_CMD_GET_IC_MODE 0xC0
+
+#define REPORT_ADDRESS_COUNT 61
+#define ILITEK_SUPPORT_MAX_POINT 40
+
+#define PTL_V3 0x03
+#define PTL_V6 0x06
+
+#define MOD_AP 0x5A
+#define MOD_BL 0x55
+
+
+struct ilitek_protocol_info {
+ u16 ver;
+ u8 ver_major;
+ u8 flag;
+};
+
+struct ilitek_touch_info {
+ u16 id;
+ u16 x;
+ u16 y;
+ u16 p;
+ u16 w;
+ u16 h;
+ u16 status;
+};
+
+struct ilitek_ts_data {
+ struct i2c_client *client;
+ struct gpio_desc *reset_gpio;
+ struct input_dev *input_dev;
+ struct touchscreen_properties prop;
+
+ int (*process_and_report)(struct ilitek_ts_data *ilitek_data);
+
+ struct PROTOCOL_MAP *ptl_cb_func;
+ struct ilitek_protocol_info ptl;
+
+ struct ilitek_touch_info tpinfo[ILITEK_SUPPORT_MAX_POINT];
+
+ char product_id[30];
+ u16 mcu_ver;
+ u8 ic_mode;
+ u8 firmware_ver[8];
+
+ s32 reset_time;
+ s32 screen_max_x;
+ s32 screen_max_y;
+ s32 screen_min_x;
+ s32 screen_min_y;
+ s32 max_tp;
+};
+
+enum ilitek_cmds {
+ /* common cmds */
+ GET_PTL_VER = 0,
+ GET_FW_VER,
+ GET_SCRN_RES,
+ GET_TP_RES,
+ GET_IC_MODE,
+ GET_MCU_VER,
+ SET_IC_SLEEP,
+ SET_IC_WAKE,
+
+ /* ALWAYS keep at the end */
+ MAX_CMD_CNT
+};
+
+typedef int protocol_func(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf);
+
+struct PROTOCOL_MAP {
+ u16 cmd;
+ const char *name;
+ protocol_func *func;
+ u8 flag;
+};
+
+/* ILITEK I2C R/W APIs */
+static int ilitek_i2c_write_and_read(struct ilitek_ts_data *ilitek_data,
+ u8 *cmd, int write_len, int delay,
+ u8 *data, int read_len)
+{
+ int ret = 0;
+ struct i2c_client *client = ilitek_data->client;
+ struct i2c_msg msgs[2] = {
+ {.addr = client->addr, .flags = 0,
+ .len = write_len, .buf = cmd,},
+ {.addr = client->addr, .flags = I2C_M_RD,
+ .len = read_len, .buf = data,}
+ };
+
+ if (delay == 0 && write_len > 0 && read_len > 0) {
+ ret = i2c_transfer(client->adapter, msgs, 2);
+ if (ret < 0)
+ return ret;
+ } else {
+ if (write_len > 0) {
+ ret = i2c_transfer(client->adapter, msgs, 1);
+ if (ret < 0)
+ return ret;
+ }
+ if (delay > 0)
+ mdelay(delay);
+ if (read_len > 0) {
+ ret = i2c_transfer(client->adapter, msgs + 1, 1);
+ if (ret < 0)
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
+/* ILITEK ISR APIs */
+static void ilitek_touch_down(struct ilitek_ts_data *ilitek_data,
+ int id, int x, int y, int p, int h, int w)
+{
+ struct input_dev *input = ilitek_data->input_dev;
+
+ input_report_key(input, BTN_TOUCH, 1);
+
+ input_mt_slot(input, id);
+ input_mt_report_slot_state(input, MT_TOOL_FINGER, true);
+
+ touchscreen_report_pos(input, &ilitek_data->prop, x, y, true);
+
+ input_event(input, EV_ABS, ABS_MT_TOUCH_MAJOR, h);
+ input_event(input, EV_ABS, ABS_MT_WIDTH_MAJOR, w);
+
+ ilitek_data->tpinfo[id].status = 1;
+ ilitek_data->tpinfo[id].id = id;
+ ilitek_data->tpinfo[id].x = x;
+ ilitek_data->tpinfo[id].y = y;
+ ilitek_data->tpinfo[id].p = p;
+ ilitek_data->tpinfo[id].h = h;
+ ilitek_data->tpinfo[id].w = w;
+}
+
+static void ilitek_touch_release(struct ilitek_ts_data *ilitek_data, int id)
+{
+ struct input_dev *input = ilitek_data->input_dev;
+
+ if (ilitek_data->tpinfo[id].status == 1) {
+ input_mt_slot(input, id);
+ input_mt_report_slot_state(input, MT_TOOL_FINGER, false);
+ ilitek_data->tpinfo[id].status = 0;
+ }
+}
+
+static void ilitek_touch_release_all(struct ilitek_ts_data *ilitek_data)
+{
+ struct input_dev *input = ilitek_data->input_dev;
+ int i = 0;
+
+ for (i = 0; i < ilitek_data->max_tp; i++)
+ ilitek_touch_release(ilitek_data, i);
+ input_report_key(input, BTN_TOUCH, 0);
+ input_sync(input);
+}
+
+static int ilitek_process_and_report_v6(struct ilitek_ts_data *ilitek_data)
+{
+ int ret = 0;
+ u8 buf[512] = {0};
+ int packet_len = 5;
+ int packet_max_point = 10;
+ int report_max_point = 6;
+ int release_point = 0;
+ int i = 0, count = 0;
+ struct input_dev *input = ilitek_data->input_dev;
+ struct device *dev = &ilitek_data->client->dev;
+ u16 x, y, p = 10, w = 10, h = 10, status, id;
+
+ ret = ilitek_i2c_write_and_read(ilitek_data, NULL, 0, 0, buf, 64);
+ if (ret < 0) {
+ dev_err(dev, "get touch info failed, err:%d\n", ret);
+ goto err_release_touch_and_key;
+ }
+
+ report_max_point = buf[REPORT_ADDRESS_COUNT];
+ if (report_max_point > ilitek_data->max_tp) {
+ dev_err(dev, "FW report max point:%d > panel info. max:%d\n",
+ report_max_point, ilitek_data->max_tp);
+ ret = -EINVAL;
+ goto err_release_touch_and_key;
+ }
+
+ count = DIV_ROUND_UP(report_max_point, packet_max_point);
+ for (i = 1; i < count; i++) {
+ ret = ilitek_i2c_write_and_read(ilitek_data, NULL, 0, 0,
+ buf + i * 64, 64);
+ if (ret < 0) {
+ dev_err(dev, "get touch info. err, count=%d\n", count);
+ goto err_release_touch_and_key;
+ }
+ }
+
+ for (i = 0; i < report_max_point; i++) {
+ status = buf[i * packet_len + 1] & 0x40;
+ id = buf[i * packet_len + 1] & 0x3F;
+
+ if (!status) {
+ release_point++;
+ ilitek_touch_release(ilitek_data, id);
+ continue;
+ }
+
+ x = get_unaligned_le16(buf + i * packet_len + 2);
+ y = get_unaligned_le16(buf + i * packet_len + 4);
+
+ if (x > ilitek_data->screen_max_x ||
+ y > ilitek_data->screen_max_y ||
+ x < ilitek_data->screen_min_x ||
+ y < ilitek_data->screen_min_y)
+ continue;
+
+ ilitek_touch_down(ilitek_data, id, x, y, p, h, w);
+ }
+
+ if (release_point == report_max_point)
+ ilitek_touch_release_all(ilitek_data);
+
+ input_sync(input);
+ return 0;
+
+err_release_touch_and_key:
+ ilitek_touch_release_all(ilitek_data);
+ input_sync(input);
+ return ret;
+}
+
+
+/* APIs of cmds for ILITEK Touch IC */
+static int api_protocol_set_cmd(struct ilitek_ts_data *ilitek_data,
+ u16 idx, u8 *inbuf, u8 *outbuf)
+{
+ u16 cmd;
+ int ret = 0;
+
+ if (idx >= MAX_CMD_CNT)
+ return -EINVAL;
+
+ /* check if cmd is supported by its protocol version */
+ if (!(ilitek_data->ptl.flag & ilitek_data->ptl_cb_func[idx].flag))
+ return -EINVAL;
+
+ cmd = ilitek_data->ptl_cb_func[idx].cmd;
+ ret = ilitek_data->ptl_cb_func[idx].func(ilitek_data, cmd,
+ inbuf, outbuf);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int api_protocol_get_ptl_ver(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ int ret = 0;
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ ret = ilitek_i2c_write_and_read(ilitek_data, buf, 1, 5, outbuf, 3);
+ if (ret < 0)
+ return ret;
+
+ ilitek_data->ptl.ver = get_unaligned_be16(outbuf);
+ ilitek_data->ptl.ver_major = outbuf[0];
+
+ return ret;
+}
+
+static int api_protocol_get_mcu_ver(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ int ret = 0;
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ ret = ilitek_i2c_write_and_read(ilitek_data, buf, 1, 5, outbuf, 32);
+ if (ret < 0)
+ return ret;
+
+ ilitek_data->mcu_ver = get_unaligned_le16(outbuf);
+ memset(ilitek_data->product_id, 0, sizeof(ilitek_data->product_id));
+ memcpy(ilitek_data->product_id, outbuf+6, 26);
+
+ return ret;
+}
+
+static int api_protocol_get_fw_ver(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ int ret = 0;
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ ret = ilitek_i2c_write_and_read(ilitek_data, buf, 1, 5, outbuf, 8);
+ if (ret < 0)
+ return ret;
+
+ memcpy(ilitek_data->firmware_ver, outbuf, 8);
+
+ return ret;
+}
+
+static int api_protocol_get_scrn_res(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ int ret = 0;
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ ret = ilitek_i2c_write_and_read(ilitek_data, buf, 1, 5, outbuf, 8);
+ if (ret < 0)
+ return ret;
+
+ ilitek_data->screen_min_x = get_unaligned_le16(outbuf);
+ ilitek_data->screen_min_y = get_unaligned_le16(outbuf + 2);
+ ilitek_data->screen_max_x = get_unaligned_le16(outbuf + 4);
+ ilitek_data->screen_max_y = get_unaligned_le16(outbuf + 6);
+
+ return ret;
+}
+
+static int api_protocol_get_tp_res(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ int ret = 0;
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ ret = ilitek_i2c_write_and_read(ilitek_data, buf, 1, 5, outbuf, 15);
+ if (ret < 0)
+ return ret;
+
+ ilitek_data->max_tp = outbuf[8];
+
+ if (ilitek_data->max_tp > ILITEK_SUPPORT_MAX_POINT) {
+ dev_err(&ilitek_data->client->dev, "Invalid MAX_TP:%d from FW\n",
+ ilitek_data->max_tp);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int api_protocol_get_ic_mode(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ int ret = 0;
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ ret = ilitek_i2c_write_and_read(ilitek_data, buf, 1, 5, outbuf, 2);
+ if (ret < 0)
+ return ret;
+
+ ilitek_data->ic_mode = outbuf[0];
+ return ret;
+}
+
+static int api_protocol_set_ic_sleep(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ return ilitek_i2c_write_and_read(ilitek_data, buf, 1, 0, NULL, 0);
+}
+
+static int api_protocol_set_ic_wake(struct ilitek_ts_data *ilitek_data,
+ u16 cmd, u8 *inbuf, u8 *outbuf)
+{
+ u8 buf[64] = {0};
+
+ buf[0] = cmd;
+ return ilitek_i2c_write_and_read(ilitek_data, buf, 1, 0, NULL, 0);
+}
+
+struct PROTOCOL_MAP ptl_func_map[] = {
+ /* common cmds */
+ [GET_PTL_VER] = {ILITEK_TP_CMD_GET_PRL_VER, "GET_PTL_VER",
+ api_protocol_get_ptl_ver, PTL_V3 | PTL_V6},
+ [GET_FW_VER] = {ILITEK_TP_CMD_GET_FW_VER, "GET_FW_VER",
+ api_protocol_get_fw_ver, PTL_V3 | PTL_V6},
+ [GET_SCRN_RES] = {ILITEK_TP_CMD_GET_SCRN_RES, "GET_SCRN_RES",
+ api_protocol_get_scrn_res, PTL_V3 | PTL_V6},
+ [GET_TP_RES] = {ILITEK_TP_CMD_GET_TP_RES, "GET_TP_RES",
+ api_protocol_get_tp_res, PTL_V3 | PTL_V6},
+ [GET_IC_MODE] = {ILITEK_TP_CMD_GET_IC_MODE, "GET_IC_MODE",
+ api_protocol_get_ic_mode, PTL_V3 | PTL_V6},
+ [GET_MCU_VER] = {ILITEK_TP_CMD_GET_MCU_VER, "GET_MOD_VER",
+ api_protocol_get_mcu_ver, PTL_V3 | PTL_V6},
+ [SET_IC_SLEEP] = {ILITEK_TP_CMD_SET_IC_SLEEP, "SET_IC_SLEEP",
+ api_protocol_set_ic_sleep, PTL_V3 | PTL_V6},
+ [SET_IC_WAKE] = {ILITEK_TP_CMD_SET_IC_WAKE, "SET_IC_WAKE",
+ api_protocol_set_ic_wake, PTL_V3 | PTL_V6},
+};
+
+/* Probe APIs */
+static void ilitek_reset(struct ilitek_ts_data *ilitek_data,
+ int delay, bool boot)
+{
+ if (!boot)
+ disable_irq_nosync(ilitek_data->client->irq);
+
+ if (ilitek_data->reset_gpio) {
+ gpiod_set_value(ilitek_data->reset_gpio, 1);
+ mdelay(10);
+
+ gpiod_set_value(ilitek_data->reset_gpio, 0);
+ mdelay(delay);
+ }
+
+ if (!boot)
+ enable_irq(ilitek_data->client->irq);
+}
+
+static int ilitek_protocol_init(struct ilitek_ts_data *ilitek_data)
+{
+ int ret = 0;
+ u8 outbuf[64] = {0};
+
+ ilitek_data->ptl.flag = PTL_V6;
+ ilitek_data->ptl_cb_func = ptl_func_map;
+ ilitek_data->process_and_report = ilitek_process_and_report_v6;
+ ilitek_data->reset_time = 600;
+
+ ret = api_protocol_set_cmd(ilitek_data, GET_PTL_VER, NULL, outbuf);
+ if (ret < 0)
+ return ret;
+
+ /* Protocol v3 is not support currently */
+ if (ilitek_data->ptl.ver_major == 0x3 ||
+ ilitek_data->ptl.ver == BL_V1_6 ||
+ ilitek_data->ptl.ver == BL_V1_7)
+ return -EINVAL;
+
+ return 0;
+}
+
+static int ilitek_read_tp_info(struct ilitek_ts_data *ilitek_data, bool boot)
+{
+ u8 outbuf[256] = {0};
+ int error = 0;
+
+ error = api_protocol_set_cmd(ilitek_data, GET_PTL_VER, NULL, outbuf);
+ if (error < 0)
+ return error;
+
+ error = api_protocol_set_cmd(ilitek_data, GET_MCU_VER, NULL, outbuf);
+ if (error < 0)
+ return error;
+
+ error = api_protocol_set_cmd(ilitek_data, GET_FW_VER, NULL, outbuf);
+ if (error < 0)
+ return error;
+
+ if (boot) {
+ error = api_protocol_set_cmd(ilitek_data, GET_SCRN_RES, NULL,
+ outbuf);
+ if (error < 0)
+ return error;
+ }
+
+ error = api_protocol_set_cmd(ilitek_data, GET_TP_RES, NULL, outbuf);
+ if (error < 0)
+ return error;
+
+ error = api_protocol_set_cmd(ilitek_data, GET_IC_MODE, NULL, outbuf);
+ if (error < 0)
+ return error;
+
+ return 0;
+}
+
+static int ilitek_input_dev_init(struct device *dev,
+ struct ilitek_ts_data *ilitek_data)
+{
+ int ret = 0;
+ struct input_dev *input = NULL;
+
+ input = devm_input_allocate_device(dev);
+ if (!input)
+ return -ENOMEM;
+
+ ilitek_data->input_dev = input;
+ input->name = ILITEK_TS_NAME;
+ input->id.bustype = BUS_I2C;
+
+ __set_bit(INPUT_PROP_DIRECT, input->propbit);
+ input->evbit[0] = BIT_MASK(EV_KEY) | BIT_MASK(EV_ABS);
+ input->keybit[BIT_WORD(BTN_TOUCH)] = BIT_MASK(BTN_TOUCH);
+
+ input_set_abs_params(input, ABS_MT_POSITION_X,
+ ilitek_data->screen_min_x,
+ ilitek_data->screen_max_x, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y,
+ ilitek_data->screen_min_y,
+ ilitek_data->screen_max_y, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
+
+ touchscreen_parse_properties(input, true, &ilitek_data->prop);
+
+ ret = input_mt_init_slots(input, ilitek_data->max_tp, INPUT_MT_DIRECT);
+ if (ret) {
+ dev_err(dev, "failed to initialize MT slots, err:%d\n", ret);
+ return ret;
+ }
+
+ ret = input_register_device(input);
+ if (ret) {
+ dev_err(dev, "failed to register input device, err:%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static irqreturn_t ilitek_i2c_isr(int irq, void *dev_id)
+{
+ struct ilitek_ts_data *ilitek_data = dev_id;
+ int ret = 0;
+
+ ret = ilitek_data->process_and_report(ilitek_data);
+
+ if (ret < 0) {
+ dev_err(&ilitek_data->client->dev, "process and report point failed, err:%d\n",
+ ret);
+ return IRQ_NONE;
+ }
+
+ return IRQ_HANDLED;
+}
+
+static ssize_t firmware_version_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct ilitek_ts_data *ilitek_data = i2c_get_clientdata(client);
+
+ return scnprintf(buf, PAGE_SIZE,
+ "ILITEK FW ver: %d.%d.%d.%d.%d.%d.%d.%d\n",
+ ilitek_data->firmware_ver[0],
+ ilitek_data->firmware_ver[1],
+ ilitek_data->firmware_ver[2],
+ ilitek_data->firmware_ver[3],
+ ilitek_data->firmware_ver[4],
+ ilitek_data->firmware_ver[5],
+ ilitek_data->firmware_ver[6],
+ ilitek_data->firmware_ver[7]);
+}
+static DEVICE_ATTR_RO(firmware_version);
+
+static ssize_t product_id_show(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct ilitek_ts_data *ilitek_data = i2c_get_clientdata(client);
+
+ return scnprintf(buf, PAGE_SIZE, "MCU: %s\n", ilitek_data->product_id);
+}
+static DEVICE_ATTR_RO(product_id);
+
+static struct attribute *ilitek_sysfs_attrs[] = {
+ &dev_attr_firmware_version.attr,
+ &dev_attr_product_id.attr,
+ NULL
+};
+
+static struct attribute_group ilitek_attrs_group[] = {
+ {.attrs = ilitek_sysfs_attrs},
+};
+
+static int ilitek_ts_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct ilitek_ts_data *ilitek_data = NULL;
+ struct device *dev = &client->dev;
+ int ret = 0;
+
+ ilitek_data = devm_kzalloc(dev, sizeof(*ilitek_data), GFP_KERNEL);
+ if (!ilitek_data)
+ return -ENOMEM;
+
+ ilitek_data->client = client;
+ i2c_set_clientdata(client, ilitek_data);
+
+ ilitek_data->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(ilitek_data->reset_gpio)) {
+ ret = PTR_ERR(ilitek_data->reset_gpio);
+ dev_err(dev, "request gpiod failed, err:%d", ret);
+ return ret;
+ }
+
+ ilitek_reset(ilitek_data, 1000, true);
+ ret = ilitek_protocol_init(ilitek_data);
+ if (ret < 0) {
+ dev_err(dev, "protocol init failed, err:%d", ret);
+ return ret;
+ }
+
+ ret = ilitek_read_tp_info(ilitek_data, true);
+ if (ret < 0) {
+ dev_err(dev, "read tp info failed, err:%d", ret);
+ return ret;
+ }
+
+ ret = ilitek_input_dev_init(dev, ilitek_data);
+ if (ret < 0) {
+ dev_err(dev, "input dev init failed, err:%d", ret);
+ return ret;
+ }
+
+ ret = devm_request_threaded_irq(dev, ilitek_data->client->irq, NULL,
+ ilitek_i2c_isr, IRQF_ONESHOT,
+ "ilitek_touch_irq", ilitek_data);
+ if (ret) {
+ dev_err(dev, "request threaded irq failed, err:%d\n", ret);
+ return ret;
+ }
+
+ ret = devm_device_add_group(dev, ilitek_attrs_group);
+ if (ret) {
+ dev_err(dev, "sysfs create group failed, err:%d\n", ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused ilitek_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct ilitek_ts_data *ilitek_data = i2c_get_clientdata(client);
+ int error = 0;
+
+ disable_irq(client->irq);
+
+ if (device_may_wakeup(dev)) {
+ enable_irq_wake(client->irq);
+ } else {
+ error = api_protocol_set_cmd(ilitek_data, SET_IC_SLEEP,
+ NULL, NULL);
+ if (error < 0)
+ return error;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused ilitek_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct ilitek_ts_data *ilitek_data = i2c_get_clientdata(client);
+ int error = 0;
+
+ if (device_may_wakeup(dev)) {
+ disable_irq_wake(client->irq);
+ } else {
+ error = api_protocol_set_cmd(ilitek_data, SET_IC_WAKE,
+ NULL, NULL);
+ if (error < 0)
+ return error;
+ }
+
+ ilitek_reset(ilitek_data, ilitek_data->reset_time, false);
+ enable_irq(client->irq);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(ilitek_pm_ops, ilitek_suspend, ilitek_resume);
+
+static const struct i2c_device_id ilitek_ts_i2c_id[] = {
+ {ILITEK_TS_NAME, 0},
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, ilitek_ts_i2c_id);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id ilitekts_acpi_id[] = {
+ { "ILTK0001", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, ilitekts_acpi_id);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id ilitek_ts_i2c_match[] = {
+ {.compatible = "ilitek,ili2130",},
+ {.compatible = "ilitek,ili2131",},
+ {.compatible = "ilitek,ili2132",},
+ {.compatible = "ilitek,ili2316",},
+ {.compatible = "ilitek,ili2322",},
+ {.compatible = "ilitek,ili2323",},
+ {.compatible = "ilitek,ili2326",},
+ {.compatible = "ilitek,ili2520",},
+ {.compatible = "ilitek,ili2521",},
+ { },
+};
+MODULE_DEVICE_TABLE(of, ilitek_ts_i2c_match);
+#endif
+
+static struct i2c_driver ilitek_ts_i2c_driver = {
+ .driver = {
+ .name = ILITEK_TS_NAME,
+ .pm = &ilitek_pm_ops,
+ .of_match_table = of_match_ptr(ilitek_ts_i2c_match),
+ .acpi_match_table = ACPI_PTR(ilitekts_acpi_id),
+ },
+ .probe = ilitek_ts_i2c_probe,
+ .id_table = ilitek_ts_i2c_id,
+};
+
+module_i2c_driver(ilitek_ts_i2c_driver);
+
+MODULE_AUTHOR("ILITEK");
+MODULE_DESCRIPTION("ILITEK I2C Touchscreen Driver");
+MODULE_LICENSE("GPL");
--
2.25.1
