[Feature]add MT2731_MP2_MR2_SVN388 baseline version
Change-Id: Ief04314834b31e27effab435d3ca8ba33b499059
diff --git a/src/kernel/linux/v4.14/drivers/input/mouse/cyapa.c b/src/kernel/linux/v4.14/drivers/input/mouse/cyapa.c
new file mode 100644
index 0000000..fd8865c
--- /dev/null
+++ b/src/kernel/linux/v4.14/drivers/input/mouse/cyapa.c
@@ -0,0 +1,1517 @@
+/*
+ * Cypress APA trackpad with I2C interface
+ *
+ * Author: Dudley Du <dudl@cypress.com>
+ * Further cleanup and restructuring by:
+ * Daniel Kurtz <djkurtz@chromium.org>
+ * Benson Leung <bleung@chromium.org>
+ *
+ * Copyright (C) 2011-2015 Cypress Semiconductor, Inc.
+ * Copyright (C) 2011-2012 Google, Inc.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file COPYING in the main directory of this archive for
+ * more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/input/mt.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/pm_runtime.h>
+#include <linux/acpi.h>
+#include <linux/of.h>
+#include "cyapa.h"
+
+
+#define CYAPA_ADAPTER_FUNC_NONE 0
+#define CYAPA_ADAPTER_FUNC_I2C 1
+#define CYAPA_ADAPTER_FUNC_SMBUS 2
+#define CYAPA_ADAPTER_FUNC_BOTH 3
+
+#define CYAPA_FW_NAME "cyapa.bin"
+
+const char product_id[] = "CYTRA";
+
+static int cyapa_reinitialize(struct cyapa *cyapa);
+
+bool cyapa_is_pip_bl_mode(struct cyapa *cyapa)
+{
+ if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_BL)
+ return true;
+
+ if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_BL)
+ return true;
+
+ return false;
+}
+
+bool cyapa_is_pip_app_mode(struct cyapa *cyapa)
+{
+ if (cyapa->gen == CYAPA_GEN6 && cyapa->state == CYAPA_STATE_GEN6_APP)
+ return true;
+
+ if (cyapa->gen == CYAPA_GEN5 && cyapa->state == CYAPA_STATE_GEN5_APP)
+ return true;
+
+ return false;
+}
+
+static bool cyapa_is_bootloader_mode(struct cyapa *cyapa)
+{
+ if (cyapa_is_pip_bl_mode(cyapa))
+ return true;
+
+ if (cyapa->gen == CYAPA_GEN3 &&
+ cyapa->state >= CYAPA_STATE_BL_BUSY &&
+ cyapa->state <= CYAPA_STATE_BL_ACTIVE)
+ return true;
+
+ return false;
+}
+
+static inline bool cyapa_is_operational_mode(struct cyapa *cyapa)
+{
+ if (cyapa_is_pip_app_mode(cyapa))
+ return true;
+
+ if (cyapa->gen == CYAPA_GEN3 && cyapa->state == CYAPA_STATE_OP)
+ return true;
+
+ return false;
+}
+
+/* Returns 0 on success, else negative errno on failure. */
+static ssize_t cyapa_i2c_read(struct cyapa *cyapa, u8 reg, size_t len,
+ u8 *values)
+{
+ struct i2c_client *client = cyapa->client;
+ struct i2c_msg msgs[] = {
+ {
+ .addr = client->addr,
+ .flags = 0,
+ .len = 1,
+ .buf = ®,
+ },
+ {
+ .addr = client->addr,
+ .flags = I2C_M_RD,
+ .len = len,
+ .buf = values,
+ },
+ };
+ int ret;
+
+ ret = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
+
+ if (ret != ARRAY_SIZE(msgs))
+ return ret < 0 ? ret : -EIO;
+
+ return 0;
+}
+
+/**
+ * cyapa_i2c_write - Execute i2c block data write operation
+ * @cyapa: Handle to this driver
+ * @ret: Offset of the data to written in the register map
+ * @len: number of bytes to write
+ * @values: Data to be written
+ *
+ * Return negative errno code on error; return zero when success.
+ */
+static int cyapa_i2c_write(struct cyapa *cyapa, u8 reg,
+ size_t len, const void *values)
+{
+ struct i2c_client *client = cyapa->client;
+ char buf[32];
+ int ret;
+
+ if (len > sizeof(buf) - 1)
+ return -ENOMEM;
+
+ buf[0] = reg;
+ memcpy(&buf[1], values, len);
+
+ ret = i2c_master_send(client, buf, len + 1);
+ if (ret != len + 1)
+ return ret < 0 ? ret : -EIO;
+
+ return 0;
+}
+
+static u8 cyapa_check_adapter_functionality(struct i2c_client *client)
+{
+ u8 ret = CYAPA_ADAPTER_FUNC_NONE;
+
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_I2C))
+ ret |= CYAPA_ADAPTER_FUNC_I2C;
+ if (i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_BLOCK_DATA |
+ I2C_FUNC_SMBUS_I2C_BLOCK))
+ ret |= CYAPA_ADAPTER_FUNC_SMBUS;
+ return ret;
+}
+
+/*
+ * Query device for its current operating state.
+ */
+static int cyapa_get_state(struct cyapa *cyapa)
+{
+ u8 status[BL_STATUS_SIZE];
+ u8 cmd[32];
+ /* The i2c address of gen4 and gen5 trackpad device must be even. */
+ bool even_addr = ((cyapa->client->addr & 0x0001) == 0);
+ bool smbus = false;
+ int retries = 2;
+ int error;
+
+ cyapa->state = CYAPA_STATE_NO_DEVICE;
+
+ /*
+ * Get trackpad status by reading 3 registers starting from 0.
+ * If the device is in the bootloader, this will be BL_HEAD.
+ * If the device is in operation mode, this will be the DATA regs.
+ *
+ */
+ error = cyapa_i2c_reg_read_block(cyapa, BL_HEAD_OFFSET, BL_STATUS_SIZE,
+ status);
+
+ /*
+ * On smbus systems in OP mode, the i2c_reg_read will fail with
+ * -ETIMEDOUT. In this case, try again using the smbus equivalent
+ * command. This should return a BL_HEAD indicating CYAPA_STATE_OP.
+ */
+ if (cyapa->smbus && (error == -ETIMEDOUT || error == -ENXIO)) {
+ if (!even_addr)
+ error = cyapa_read_block(cyapa,
+ CYAPA_CMD_BL_STATUS, status);
+ smbus = true;
+ }
+
+ if (error != BL_STATUS_SIZE)
+ goto error;
+
+ /*
+ * Detect trackpad protocol based on characteristic registers and bits.
+ */
+ do {
+ cyapa->status[REG_OP_STATUS] = status[REG_OP_STATUS];
+ cyapa->status[REG_BL_STATUS] = status[REG_BL_STATUS];
+ cyapa->status[REG_BL_ERROR] = status[REG_BL_ERROR];
+
+ if (cyapa->gen == CYAPA_GEN_UNKNOWN ||
+ cyapa->gen == CYAPA_GEN3) {
+ error = cyapa_gen3_ops.state_parse(cyapa,
+ status, BL_STATUS_SIZE);
+ if (!error)
+ goto out_detected;
+ }
+ if (cyapa->gen == CYAPA_GEN_UNKNOWN ||
+ cyapa->gen == CYAPA_GEN6 ||
+ cyapa->gen == CYAPA_GEN5) {
+ error = cyapa_pip_state_parse(cyapa,
+ status, BL_STATUS_SIZE);
+ if (!error)
+ goto out_detected;
+ }
+ /* For old Gen5 trackpads detecting. */
+ if ((cyapa->gen == CYAPA_GEN_UNKNOWN ||
+ cyapa->gen == CYAPA_GEN5) &&
+ !smbus && even_addr) {
+ error = cyapa_gen5_ops.state_parse(cyapa,
+ status, BL_STATUS_SIZE);
+ if (!error)
+ goto out_detected;
+ }
+
+ /*
+ * Write 0x00 0x00 to trackpad device to force update its
+ * status, then redo the detection again.
+ */
+ if (!smbus) {
+ cmd[0] = 0x00;
+ cmd[1] = 0x00;
+ error = cyapa_i2c_write(cyapa, 0, 2, cmd);
+ if (error)
+ goto error;
+
+ msleep(50);
+
+ error = cyapa_i2c_read(cyapa, BL_HEAD_OFFSET,
+ BL_STATUS_SIZE, status);
+ if (error)
+ goto error;
+ }
+ } while (--retries > 0 && !smbus);
+
+ goto error;
+
+out_detected:
+ if (cyapa->state <= CYAPA_STATE_BL_BUSY)
+ return -EAGAIN;
+ return 0;
+
+error:
+ return (error < 0) ? error : -EAGAIN;
+}
+
+/*
+ * Poll device for its status in a loop, waiting up to timeout for a response.
+ *
+ * When the device switches state, it usually takes ~300 ms.
+ * However, when running a new firmware image, the device must calibrate its
+ * sensors, which can take as long as 2 seconds.
+ *
+ * Note: The timeout has granularity of the polling rate, which is 100 ms.
+ *
+ * Returns:
+ * 0 when the device eventually responds with a valid non-busy state.
+ * -ETIMEDOUT if device never responds (too many -EAGAIN)
+ * -EAGAIN if bootload is busy, or unknown state.
+ * < 0 other errors
+ */
+int cyapa_poll_state(struct cyapa *cyapa, unsigned int timeout)
+{
+ int error;
+ int tries = timeout / 100;
+
+ do {
+ error = cyapa_get_state(cyapa);
+ if (!error && cyapa->state > CYAPA_STATE_BL_BUSY)
+ return 0;
+
+ msleep(100);
+ } while (tries--);
+
+ return (error == -EAGAIN || error == -ETIMEDOUT) ? -ETIMEDOUT : error;
+}
+
+/*
+ * Check if device is operational.
+ *
+ * An operational device is responding, has exited bootloader, and has
+ * firmware supported by this driver.
+ *
+ * Returns:
+ * -ENODEV no device
+ * -EBUSY no device or in bootloader
+ * -EIO failure while reading from device
+ * -ETIMEDOUT timeout failure for bus idle or bus no response
+ * -EAGAIN device is still in bootloader
+ * if ->state = CYAPA_STATE_BL_IDLE, device has invalid firmware
+ * -EINVAL device is in operational mode, but not supported by this driver
+ * 0 device is supported
+ */
+static int cyapa_check_is_operational(struct cyapa *cyapa)
+{
+ int error;
+
+ error = cyapa_poll_state(cyapa, 4000);
+ if (error)
+ return error;
+
+ switch (cyapa->gen) {
+ case CYAPA_GEN6:
+ cyapa->ops = &cyapa_gen6_ops;
+ break;
+ case CYAPA_GEN5:
+ cyapa->ops = &cyapa_gen5_ops;
+ break;
+ case CYAPA_GEN3:
+ cyapa->ops = &cyapa_gen3_ops;
+ break;
+ default:
+ return -ENODEV;
+ }
+
+ error = cyapa->ops->operational_check(cyapa);
+ if (!error && cyapa_is_operational_mode(cyapa))
+ cyapa->operational = true;
+ else
+ cyapa->operational = false;
+
+ return error;
+}
+
+
+/*
+ * Returns 0 on device detected, negative errno on no device detected.
+ * And when the device is detected and operational, it will be reset to
+ * full power active mode automatically.
+ */
+static int cyapa_detect(struct cyapa *cyapa)
+{
+ struct device *dev = &cyapa->client->dev;
+ int error;
+
+ error = cyapa_check_is_operational(cyapa);
+ if (error) {
+ if (error != -ETIMEDOUT && error != -ENODEV &&
+ cyapa_is_bootloader_mode(cyapa)) {
+ dev_warn(dev, "device detected but not operational\n");
+ return 0;
+ }
+
+ dev_err(dev, "no device detected: %d\n", error);
+ return error;
+ }
+
+ return 0;
+}
+
+static int cyapa_open(struct input_dev *input)
+{
+ struct cyapa *cyapa = input_get_drvdata(input);
+ struct i2c_client *client = cyapa->client;
+ struct device *dev = &client->dev;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ if (cyapa->operational) {
+ /*
+ * though failed to set active power mode,
+ * but still may be able to work in lower scan rate
+ * when in operational mode.
+ */
+ error = cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
+ if (error) {
+ dev_warn(dev, "set active power failed: %d\n", error);
+ goto out;
+ }
+ } else {
+ error = cyapa_reinitialize(cyapa);
+ if (error || !cyapa->operational) {
+ error = error ? error : -EAGAIN;
+ goto out;
+ }
+ }
+
+ enable_irq(client->irq);
+ if (!pm_runtime_enabled(dev)) {
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+ }
+
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
+out:
+ mutex_unlock(&cyapa->state_sync_lock);
+ return error;
+}
+
+static void cyapa_close(struct input_dev *input)
+{
+ struct cyapa *cyapa = input_get_drvdata(input);
+ struct i2c_client *client = cyapa->client;
+ struct device *dev = &cyapa->client->dev;
+
+ mutex_lock(&cyapa->state_sync_lock);
+
+ disable_irq(client->irq);
+ if (pm_runtime_enabled(dev))
+ pm_runtime_disable(dev);
+ pm_runtime_set_suspended(dev);
+
+ if (cyapa->operational)
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE);
+
+ mutex_unlock(&cyapa->state_sync_lock);
+}
+
+static int cyapa_create_input_dev(struct cyapa *cyapa)
+{
+ struct device *dev = &cyapa->client->dev;
+ struct input_dev *input;
+ int error;
+
+ if (!cyapa->physical_size_x || !cyapa->physical_size_y)
+ return -EINVAL;
+
+ input = devm_input_allocate_device(dev);
+ if (!input) {
+ dev_err(dev, "failed to allocate memory for input device.\n");
+ return -ENOMEM;
+ }
+
+ input->name = CYAPA_NAME;
+ input->phys = cyapa->phys;
+ input->id.bustype = BUS_I2C;
+ input->id.version = 1;
+ input->id.product = 0; /* Means any product in eventcomm. */
+ input->dev.parent = &cyapa->client->dev;
+
+ input->open = cyapa_open;
+ input->close = cyapa_close;
+
+ input_set_drvdata(input, cyapa);
+
+ __set_bit(EV_ABS, input->evbit);
+
+ /* Finger position */
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, cyapa->max_abs_x, 0,
+ 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, cyapa->max_abs_y, 0,
+ 0);
+ input_set_abs_params(input, ABS_MT_PRESSURE, 0, cyapa->max_z, 0, 0);
+ if (cyapa->gen > CYAPA_GEN3) {
+ input_set_abs_params(input, ABS_MT_TOUCH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(input, ABS_MT_TOUCH_MINOR, 0, 255, 0, 0);
+ /*
+ * Orientation is the angle between the vertical axis and
+ * the major axis of the contact ellipse.
+ * The range is -127 to 127.
+ * the positive direction is clockwise form the vertical axis.
+ * If the ellipse of contact degenerates into a circle,
+ * orientation is reported as 0.
+ *
+ * Also, for Gen5 trackpad the accurate of this orientation
+ * value is value + (-30 ~ 30).
+ */
+ input_set_abs_params(input, ABS_MT_ORIENTATION,
+ -127, 127, 0, 0);
+ }
+ if (cyapa->gen >= CYAPA_GEN5) {
+ input_set_abs_params(input, ABS_MT_WIDTH_MAJOR, 0, 255, 0, 0);
+ input_set_abs_params(input, ABS_MT_WIDTH_MINOR, 0, 255, 0, 0);
+ input_set_abs_params(input, ABS_DISTANCE, 0, 1, 0, 0);
+ }
+
+ input_abs_set_res(input, ABS_MT_POSITION_X,
+ cyapa->max_abs_x / cyapa->physical_size_x);
+ input_abs_set_res(input, ABS_MT_POSITION_Y,
+ cyapa->max_abs_y / cyapa->physical_size_y);
+
+ if (cyapa->btn_capability & CAPABILITY_LEFT_BTN_MASK)
+ __set_bit(BTN_LEFT, input->keybit);
+ if (cyapa->btn_capability & CAPABILITY_MIDDLE_BTN_MASK)
+ __set_bit(BTN_MIDDLE, input->keybit);
+ if (cyapa->btn_capability & CAPABILITY_RIGHT_BTN_MASK)
+ __set_bit(BTN_RIGHT, input->keybit);
+
+ if (cyapa->btn_capability == CAPABILITY_LEFT_BTN_MASK)
+ __set_bit(INPUT_PROP_BUTTONPAD, input->propbit);
+
+ /* Handle pointer emulation and unused slots in core */
+ error = input_mt_init_slots(input, CYAPA_MAX_MT_SLOTS,
+ INPUT_MT_POINTER | INPUT_MT_DROP_UNUSED);
+ if (error) {
+ dev_err(dev, "failed to initialize MT slots: %d\n", error);
+ return error;
+ }
+
+ /* Register the device in input subsystem */
+ error = input_register_device(input);
+ if (error) {
+ dev_err(dev, "failed to register input device: %d\n", error);
+ return error;
+ }
+
+ cyapa->input = input;
+ return 0;
+}
+
+static void cyapa_enable_irq_for_cmd(struct cyapa *cyapa)
+{
+ struct input_dev *input = cyapa->input;
+
+ if (!input || !input->users) {
+ /*
+ * When input is NULL, TP must be in deep sleep mode.
+ * In this mode, later non-power I2C command will always failed
+ * if not bring it out of deep sleep mode firstly,
+ * so must command TP to active mode here.
+ */
+ if (!input || cyapa->operational)
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
+ /* Gen3 always using polling mode for command. */
+ if (cyapa->gen >= CYAPA_GEN5)
+ enable_irq(cyapa->client->irq);
+ }
+}
+
+static void cyapa_disable_irq_for_cmd(struct cyapa *cyapa)
+{
+ struct input_dev *input = cyapa->input;
+
+ if (!input || !input->users) {
+ if (cyapa->gen >= CYAPA_GEN5)
+ disable_irq(cyapa->client->irq);
+ if (!input || cyapa->operational)
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE);
+ }
+}
+
+/*
+ * cyapa_sleep_time_to_pwr_cmd and cyapa_pwr_cmd_to_sleep_time
+ *
+ * These are helper functions that convert to and from integer idle
+ * times and register settings to write to the PowerMode register.
+ * The trackpad supports between 20ms to 1000ms scan intervals.
+ * The time will be increased in increments of 10ms from 20ms to 100ms.
+ * From 100ms to 1000ms, time will be increased in increments of 20ms.
+ *
+ * When Idle_Time < 100, the format to convert Idle_Time to Idle_Command is:
+ * Idle_Command = Idle Time / 10;
+ * When Idle_Time >= 100, the format to convert Idle_Time to Idle_Command is:
+ * Idle_Command = Idle Time / 20 + 5;
+ */
+u8 cyapa_sleep_time_to_pwr_cmd(u16 sleep_time)
+{
+ u16 encoded_time;
+
+ sleep_time = clamp_val(sleep_time, 20, 1000);
+ encoded_time = sleep_time < 100 ? sleep_time / 10 : sleep_time / 20 + 5;
+ return (encoded_time << 2) & PWR_MODE_MASK;
+}
+
+u16 cyapa_pwr_cmd_to_sleep_time(u8 pwr_mode)
+{
+ u8 encoded_time = pwr_mode >> 2;
+
+ return (encoded_time < 10) ? encoded_time * 10
+ : (encoded_time - 5) * 20;
+}
+
+/* 0 on driver initialize and detected successfully, negative on failure. */
+static int cyapa_initialize(struct cyapa *cyapa)
+{
+ int error = 0;
+
+ cyapa->state = CYAPA_STATE_NO_DEVICE;
+ cyapa->gen = CYAPA_GEN_UNKNOWN;
+ mutex_init(&cyapa->state_sync_lock);
+
+ /*
+ * Set to hard code default, they will be updated with trackpad set
+ * default values after probe and initialized.
+ */
+ cyapa->suspend_power_mode = PWR_MODE_SLEEP;
+ cyapa->suspend_sleep_time =
+ cyapa_pwr_cmd_to_sleep_time(cyapa->suspend_power_mode);
+
+ /* ops.initialize() is aimed to prepare for module communications. */
+ error = cyapa_gen3_ops.initialize(cyapa);
+ if (!error)
+ error = cyapa_gen5_ops.initialize(cyapa);
+ if (!error)
+ error = cyapa_gen6_ops.initialize(cyapa);
+ if (error)
+ return error;
+
+ error = cyapa_detect(cyapa);
+ if (error)
+ return error;
+
+ /* Power down the device until we need it. */
+ if (cyapa->operational)
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_OFF, 0, CYAPA_PM_ACTIVE);
+
+ return 0;
+}
+
+static int cyapa_reinitialize(struct cyapa *cyapa)
+{
+ struct device *dev = &cyapa->client->dev;
+ struct input_dev *input = cyapa->input;
+ int error;
+
+ if (pm_runtime_enabled(dev))
+ pm_runtime_disable(dev);
+
+ /* Avoid command failures when TP was in OFF state. */
+ if (cyapa->operational)
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_ACTIVE);
+
+ error = cyapa_detect(cyapa);
+ if (error)
+ goto out;
+
+ if (!input && cyapa->operational) {
+ error = cyapa_create_input_dev(cyapa);
+ if (error) {
+ dev_err(dev, "create input_dev instance failed: %d\n",
+ error);
+ goto out;
+ }
+ }
+
+out:
+ if (!input || !input->users) {
+ /* Reset to power OFF state to save power when no user open. */
+ if (cyapa->operational)
+ cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_OFF, 0, CYAPA_PM_DEACTIVE);
+ } else if (!error && cyapa->operational) {
+ /*
+ * Make sure only enable runtime PM when device is
+ * in operational mode and input->users > 0.
+ */
+ pm_runtime_set_active(dev);
+ pm_runtime_enable(dev);
+
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
+ }
+
+ return error;
+}
+
+static irqreturn_t cyapa_irq(int irq, void *dev_id)
+{
+ struct cyapa *cyapa = dev_id;
+ struct device *dev = &cyapa->client->dev;
+ int error;
+
+ if (device_may_wakeup(dev))
+ pm_wakeup_event(dev, 0);
+
+ /* Interrupt event can be caused by host command to trackpad device. */
+ if (cyapa->ops->irq_cmd_handler(cyapa)) {
+ /*
+ * Interrupt event maybe from trackpad device input reporting.
+ */
+ if (!cyapa->input) {
+ /*
+ * Still in probing or in firmware image
+ * updating or reading.
+ */
+ cyapa->ops->sort_empty_output_data(cyapa,
+ NULL, NULL, NULL);
+ goto out;
+ }
+
+ if (cyapa->operational) {
+ error = cyapa->ops->irq_handler(cyapa);
+
+ /*
+ * Apply runtime power management to touch report event
+ * except the events caused by the command responses.
+ * Note:
+ * It will introduce about 20~40 ms additional delay
+ * time in receiving for first valid touch report data.
+ * The time is used to execute device runtime resume
+ * process.
+ */
+ pm_runtime_get_sync(dev);
+ pm_runtime_mark_last_busy(dev);
+ pm_runtime_put_sync_autosuspend(dev);
+ }
+
+ if (!cyapa->operational || error) {
+ if (!mutex_trylock(&cyapa->state_sync_lock)) {
+ cyapa->ops->sort_empty_output_data(cyapa,
+ NULL, NULL, NULL);
+ goto out;
+ }
+ cyapa_reinitialize(cyapa);
+ mutex_unlock(&cyapa->state_sync_lock);
+ }
+ }
+
+out:
+ return IRQ_HANDLED;
+}
+
+/*
+ **************************************************************
+ * sysfs interface
+ **************************************************************
+*/
+#ifdef CONFIG_PM_SLEEP
+static ssize_t cyapa_show_suspend_scanrate(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ u8 pwr_cmd = cyapa->suspend_power_mode;
+ u16 sleep_time;
+ int len;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ pwr_cmd = cyapa->suspend_power_mode;
+ sleep_time = cyapa->suspend_sleep_time;
+
+ mutex_unlock(&cyapa->state_sync_lock);
+
+ switch (pwr_cmd) {
+ case PWR_MODE_BTN_ONLY:
+ len = scnprintf(buf, PAGE_SIZE, "%s\n", BTN_ONLY_MODE_NAME);
+ break;
+
+ case PWR_MODE_OFF:
+ len = scnprintf(buf, PAGE_SIZE, "%s\n", OFF_MODE_NAME);
+ break;
+
+ default:
+ len = scnprintf(buf, PAGE_SIZE, "%u\n",
+ cyapa->gen == CYAPA_GEN3 ?
+ cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
+ sleep_time);
+ break;
+ }
+
+ return len;
+}
+
+static ssize_t cyapa_update_suspend_scanrate(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ u16 sleep_time;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ if (sysfs_streq(buf, BTN_ONLY_MODE_NAME)) {
+ cyapa->suspend_power_mode = PWR_MODE_BTN_ONLY;
+ } else if (sysfs_streq(buf, OFF_MODE_NAME)) {
+ cyapa->suspend_power_mode = PWR_MODE_OFF;
+ } else if (!kstrtou16(buf, 10, &sleep_time)) {
+ cyapa->suspend_sleep_time = min_t(u16, sleep_time, 1000);
+ cyapa->suspend_power_mode =
+ cyapa_sleep_time_to_pwr_cmd(cyapa->suspend_sleep_time);
+ } else {
+ count = -EINVAL;
+ }
+
+ mutex_unlock(&cyapa->state_sync_lock);
+
+ return count;
+}
+
+static DEVICE_ATTR(suspend_scanrate_ms, S_IRUGO|S_IWUSR,
+ cyapa_show_suspend_scanrate,
+ cyapa_update_suspend_scanrate);
+
+static struct attribute *cyapa_power_wakeup_entries[] = {
+ &dev_attr_suspend_scanrate_ms.attr,
+ NULL,
+};
+
+static const struct attribute_group cyapa_power_wakeup_group = {
+ .name = power_group_name,
+ .attrs = cyapa_power_wakeup_entries,
+};
+
+static void cyapa_remove_power_wakeup_group(void *data)
+{
+ struct cyapa *cyapa = data;
+
+ sysfs_unmerge_group(&cyapa->client->dev.kobj,
+ &cyapa_power_wakeup_group);
+}
+
+static int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
+{
+ struct i2c_client *client = cyapa->client;
+ struct device *dev = &client->dev;
+ int error;
+
+ if (device_can_wakeup(dev)) {
+ error = sysfs_merge_group(&dev->kobj,
+ &cyapa_power_wakeup_group);
+ if (error) {
+ dev_err(dev, "failed to add power wakeup group: %d\n",
+ error);
+ return error;
+ }
+
+ error = devm_add_action(dev,
+ cyapa_remove_power_wakeup_group, cyapa);
+ if (error) {
+ cyapa_remove_power_wakeup_group(cyapa);
+ dev_err(dev, "failed to add power cleanup action: %d\n",
+ error);
+ return error;
+ }
+ }
+
+ return 0;
+}
+#else
+static inline int cyapa_prepare_wakeup_controls(struct cyapa *cyapa)
+{
+ return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+#ifdef CONFIG_PM
+static ssize_t cyapa_show_rt_suspend_scanrate(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ u8 pwr_cmd;
+ u16 sleep_time;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ pwr_cmd = cyapa->runtime_suspend_power_mode;
+ sleep_time = cyapa->runtime_suspend_sleep_time;
+
+ mutex_unlock(&cyapa->state_sync_lock);
+
+ return scnprintf(buf, PAGE_SIZE, "%u\n",
+ cyapa->gen == CYAPA_GEN3 ?
+ cyapa_pwr_cmd_to_sleep_time(pwr_cmd) :
+ sleep_time);
+}
+
+static ssize_t cyapa_update_rt_suspend_scanrate(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ u16 time;
+ int error;
+
+ if (buf == NULL || count == 0 || kstrtou16(buf, 10, &time)) {
+ dev_err(dev, "invalid runtime suspend scanrate ms parameter\n");
+ return -EINVAL;
+ }
+
+ /*
+ * When the suspend scanrate is changed, pm_runtime_get to resume
+ * a potentially suspended device, update to the new pwr_cmd
+ * and then pm_runtime_put to suspend into the new power mode.
+ */
+ pm_runtime_get_sync(dev);
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ cyapa->runtime_suspend_sleep_time = min_t(u16, time, 1000);
+ cyapa->runtime_suspend_power_mode =
+ cyapa_sleep_time_to_pwr_cmd(cyapa->runtime_suspend_sleep_time);
+
+ mutex_unlock(&cyapa->state_sync_lock);
+
+ pm_runtime_put_sync_autosuspend(dev);
+
+ return count;
+}
+
+static DEVICE_ATTR(runtime_suspend_scanrate_ms, S_IRUGO|S_IWUSR,
+ cyapa_show_rt_suspend_scanrate,
+ cyapa_update_rt_suspend_scanrate);
+
+static struct attribute *cyapa_power_runtime_entries[] = {
+ &dev_attr_runtime_suspend_scanrate_ms.attr,
+ NULL,
+};
+
+static const struct attribute_group cyapa_power_runtime_group = {
+ .name = power_group_name,
+ .attrs = cyapa_power_runtime_entries,
+};
+
+static void cyapa_remove_power_runtime_group(void *data)
+{
+ struct cyapa *cyapa = data;
+
+ sysfs_unmerge_group(&cyapa->client->dev.kobj,
+ &cyapa_power_runtime_group);
+}
+
+static int cyapa_start_runtime(struct cyapa *cyapa)
+{
+ struct device *dev = &cyapa->client->dev;
+ int error;
+
+ cyapa->runtime_suspend_power_mode = PWR_MODE_IDLE;
+ cyapa->runtime_suspend_sleep_time =
+ cyapa_pwr_cmd_to_sleep_time(cyapa->runtime_suspend_power_mode);
+
+ error = sysfs_merge_group(&dev->kobj, &cyapa_power_runtime_group);
+ if (error) {
+ dev_err(dev,
+ "failed to create power runtime group: %d\n", error);
+ return error;
+ }
+
+ error = devm_add_action(dev, cyapa_remove_power_runtime_group, cyapa);
+ if (error) {
+ cyapa_remove_power_runtime_group(cyapa);
+ dev_err(dev,
+ "failed to add power runtime cleanup action: %d\n",
+ error);
+ return error;
+ }
+
+ /* runtime is enabled until device is operational and opened. */
+ pm_runtime_set_suspended(dev);
+ pm_runtime_use_autosuspend(dev);
+ pm_runtime_set_autosuspend_delay(dev, AUTOSUSPEND_DELAY);
+
+ return 0;
+}
+#else
+static inline int cyapa_start_runtime(struct cyapa *cyapa)
+{
+ return 0;
+}
+#endif /* CONFIG_PM */
+
+static ssize_t cyapa_show_fm_ver(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ int error;
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+ error = scnprintf(buf, PAGE_SIZE, "%d.%d\n", cyapa->fw_maj_ver,
+ cyapa->fw_min_ver);
+ mutex_unlock(&cyapa->state_sync_lock);
+ return error;
+}
+
+static ssize_t cyapa_show_product_id(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ int size;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+ size = scnprintf(buf, PAGE_SIZE, "%s\n", cyapa->product_id);
+ mutex_unlock(&cyapa->state_sync_lock);
+ return size;
+}
+
+static int cyapa_firmware(struct cyapa *cyapa, const char *fw_name)
+{
+ struct device *dev = &cyapa->client->dev;
+ const struct firmware *fw;
+ int error;
+
+ error = request_firmware(&fw, fw_name, dev);
+ if (error) {
+ dev_err(dev, "Could not load firmware from %s: %d\n",
+ fw_name, error);
+ return error;
+ }
+
+ error = cyapa->ops->check_fw(cyapa, fw);
+ if (error) {
+ dev_err(dev, "Invalid CYAPA firmware image: %s\n",
+ fw_name);
+ goto done;
+ }
+
+ /*
+ * Resume the potentially suspended device because doing FW
+ * update on a device not in the FULL mode has a chance to
+ * fail.
+ */
+ pm_runtime_get_sync(dev);
+
+ /* Require IRQ support for firmware update commands. */
+ cyapa_enable_irq_for_cmd(cyapa);
+
+ error = cyapa->ops->bl_enter(cyapa);
+ if (error) {
+ dev_err(dev, "bl_enter failed, %d\n", error);
+ goto err_detect;
+ }
+
+ error = cyapa->ops->bl_activate(cyapa);
+ if (error) {
+ dev_err(dev, "bl_activate failed, %d\n", error);
+ goto err_detect;
+ }
+
+ error = cyapa->ops->bl_initiate(cyapa, fw);
+ if (error) {
+ dev_err(dev, "bl_initiate failed, %d\n", error);
+ goto err_detect;
+ }
+
+ error = cyapa->ops->update_fw(cyapa, fw);
+ if (error) {
+ dev_err(dev, "update_fw failed, %d\n", error);
+ goto err_detect;
+ }
+
+err_detect:
+ cyapa_disable_irq_for_cmd(cyapa);
+ pm_runtime_put_noidle(dev);
+
+done:
+ release_firmware(fw);
+ return error;
+}
+
+static ssize_t cyapa_update_fw_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ char fw_name[NAME_MAX];
+ int ret, error;
+
+ if (count >= NAME_MAX) {
+ dev_err(dev, "File name too long\n");
+ return -EINVAL;
+ }
+
+ memcpy(fw_name, buf, count);
+ if (fw_name[count - 1] == '\n')
+ fw_name[count - 1] = '\0';
+ else
+ fw_name[count] = '\0';
+
+ if (cyapa->input) {
+ /*
+ * Force the input device to be registered after the firmware
+ * image is updated, so if the corresponding parameters updated
+ * in the new firmware image can taken effect immediately.
+ */
+ input_unregister_device(cyapa->input);
+ cyapa->input = NULL;
+ }
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error) {
+ /*
+ * Whatever, do reinitialize to try to recover TP state to
+ * previous state just as it entered fw update entrance.
+ */
+ cyapa_reinitialize(cyapa);
+ return error;
+ }
+
+ error = cyapa_firmware(cyapa, fw_name);
+ if (error)
+ dev_err(dev, "firmware update failed: %d\n", error);
+ else
+ dev_dbg(dev, "firmware update successfully done.\n");
+
+ /*
+ * Re-detect trackpad device states because firmware update process
+ * will reset trackpad device into bootloader mode.
+ */
+ ret = cyapa_reinitialize(cyapa);
+ if (ret) {
+ dev_err(dev, "failed to re-detect after updated: %d\n", ret);
+ error = error ? error : ret;
+ }
+
+ mutex_unlock(&cyapa->state_sync_lock);
+
+ return error ? error : count;
+}
+
+static ssize_t cyapa_calibrate_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ if (cyapa->operational) {
+ cyapa_enable_irq_for_cmd(cyapa);
+ error = cyapa->ops->calibrate_store(dev, attr, buf, count);
+ cyapa_disable_irq_for_cmd(cyapa);
+ } else {
+ error = -EBUSY; /* Still running in bootloader mode. */
+ }
+
+ mutex_unlock(&cyapa->state_sync_lock);
+ return error < 0 ? error : count;
+}
+
+static ssize_t cyapa_show_baseline(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ ssize_t error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ if (cyapa->operational) {
+ cyapa_enable_irq_for_cmd(cyapa);
+ error = cyapa->ops->show_baseline(dev, attr, buf);
+ cyapa_disable_irq_for_cmd(cyapa);
+ } else {
+ error = -EBUSY; /* Still running in bootloader mode. */
+ }
+
+ mutex_unlock(&cyapa->state_sync_lock);
+ return error;
+}
+
+static char *cyapa_state_to_string(struct cyapa *cyapa)
+{
+ switch (cyapa->state) {
+ case CYAPA_STATE_BL_BUSY:
+ return "bootloader busy";
+ case CYAPA_STATE_BL_IDLE:
+ return "bootloader idle";
+ case CYAPA_STATE_BL_ACTIVE:
+ return "bootloader active";
+ case CYAPA_STATE_GEN5_BL:
+ case CYAPA_STATE_GEN6_BL:
+ return "bootloader";
+ case CYAPA_STATE_OP:
+ case CYAPA_STATE_GEN5_APP:
+ case CYAPA_STATE_GEN6_APP:
+ return "operational"; /* Normal valid state. */
+ default:
+ return "invalid mode";
+ }
+}
+
+static ssize_t cyapa_show_mode(struct device *dev,
+ struct device_attribute *attr, char *buf)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ int size;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ size = scnprintf(buf, PAGE_SIZE, "gen%d %s\n",
+ cyapa->gen, cyapa_state_to_string(cyapa));
+
+ mutex_unlock(&cyapa->state_sync_lock);
+ return size;
+}
+
+static DEVICE_ATTR(firmware_version, S_IRUGO, cyapa_show_fm_ver, NULL);
+static DEVICE_ATTR(product_id, S_IRUGO, cyapa_show_product_id, NULL);
+static DEVICE_ATTR(update_fw, S_IWUSR, NULL, cyapa_update_fw_store);
+static DEVICE_ATTR(baseline, S_IRUGO, cyapa_show_baseline, NULL);
+static DEVICE_ATTR(calibrate, S_IWUSR, NULL, cyapa_calibrate_store);
+static DEVICE_ATTR(mode, S_IRUGO, cyapa_show_mode, NULL);
+
+static struct attribute *cyapa_sysfs_entries[] = {
+ &dev_attr_firmware_version.attr,
+ &dev_attr_product_id.attr,
+ &dev_attr_update_fw.attr,
+ &dev_attr_baseline.attr,
+ &dev_attr_calibrate.attr,
+ &dev_attr_mode.attr,
+ NULL,
+};
+
+static const struct attribute_group cyapa_sysfs_group = {
+ .attrs = cyapa_sysfs_entries,
+};
+
+static void cyapa_remove_sysfs_group(void *data)
+{
+ struct cyapa *cyapa = data;
+
+ sysfs_remove_group(&cyapa->client->dev.kobj, &cyapa_sysfs_group);
+}
+
+static void cyapa_disable_regulator(void *data)
+{
+ struct cyapa *cyapa = data;
+
+ regulator_disable(cyapa->vcc);
+}
+
+static int cyapa_probe(struct i2c_client *client,
+ const struct i2c_device_id *dev_id)
+{
+ struct device *dev = &client->dev;
+ struct cyapa *cyapa;
+ u8 adapter_func;
+ union i2c_smbus_data dummy;
+ int error;
+
+ adapter_func = cyapa_check_adapter_functionality(client);
+ if (adapter_func == CYAPA_ADAPTER_FUNC_NONE) {
+ dev_err(dev, "not a supported I2C/SMBus adapter\n");
+ return -EIO;
+ }
+
+ /* Make sure there is something at this address */
+ if (i2c_smbus_xfer(client->adapter, client->addr, 0,
+ I2C_SMBUS_READ, 0, I2C_SMBUS_BYTE, &dummy) < 0)
+ return -ENODEV;
+
+ cyapa = devm_kzalloc(dev, sizeof(struct cyapa), GFP_KERNEL);
+ if (!cyapa)
+ return -ENOMEM;
+
+ /* i2c isn't supported, use smbus */
+ if (adapter_func == CYAPA_ADAPTER_FUNC_SMBUS)
+ cyapa->smbus = true;
+
+ cyapa->client = client;
+ i2c_set_clientdata(client, cyapa);
+ sprintf(cyapa->phys, "i2c-%d-%04x/input0", client->adapter->nr,
+ client->addr);
+
+ cyapa->vcc = devm_regulator_get(dev, "vcc");
+ if (IS_ERR(cyapa->vcc)) {
+ error = PTR_ERR(cyapa->vcc);
+ dev_err(dev, "failed to get vcc regulator: %d\n", error);
+ return error;
+ }
+
+ error = regulator_enable(cyapa->vcc);
+ if (error) {
+ dev_err(dev, "failed to enable regulator: %d\n", error);
+ return error;
+ }
+
+ error = devm_add_action(dev, cyapa_disable_regulator, cyapa);
+ if (error) {
+ cyapa_disable_regulator(cyapa);
+ dev_err(dev, "failed to add disable regulator action: %d\n",
+ error);
+ return error;
+ }
+
+ error = cyapa_initialize(cyapa);
+ if (error) {
+ dev_err(dev, "failed to detect and initialize tp device.\n");
+ return error;
+ }
+
+ error = sysfs_create_group(&dev->kobj, &cyapa_sysfs_group);
+ if (error) {
+ dev_err(dev, "failed to create sysfs entries: %d\n", error);
+ return error;
+ }
+
+ error = devm_add_action(dev, cyapa_remove_sysfs_group, cyapa);
+ if (error) {
+ cyapa_remove_sysfs_group(cyapa);
+ dev_err(dev, "failed to add sysfs cleanup action: %d\n", error);
+ return error;
+ }
+
+ error = cyapa_prepare_wakeup_controls(cyapa);
+ if (error) {
+ dev_err(dev, "failed to prepare wakeup controls: %d\n", error);
+ return error;
+ }
+
+ error = cyapa_start_runtime(cyapa);
+ if (error) {
+ dev_err(dev, "failed to start pm_runtime: %d\n", error);
+ return error;
+ }
+
+ error = devm_request_threaded_irq(dev, client->irq,
+ NULL, cyapa_irq,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ "cyapa", cyapa);
+ if (error) {
+ dev_err(dev, "failed to request threaded irq: %d\n", error);
+ return error;
+ }
+
+ /* Disable IRQ until the device is opened */
+ disable_irq(client->irq);
+
+ /*
+ * Register the device in the input subsystem when it's operational.
+ * Otherwise, keep in this driver, so it can be be recovered or updated
+ * through the sysfs mode and update_fw interfaces by user or apps.
+ */
+ if (cyapa->operational) {
+ error = cyapa_create_input_dev(cyapa);
+ if (error) {
+ dev_err(dev, "create input_dev instance failed: %d\n",
+ error);
+ return error;
+ }
+ }
+
+ return 0;
+}
+
+static int __maybe_unused cyapa_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct cyapa *cyapa = i2c_get_clientdata(client);
+ u8 power_mode;
+ int error;
+
+ error = mutex_lock_interruptible(&cyapa->state_sync_lock);
+ if (error)
+ return error;
+
+ /*
+ * Runtime PM is enable only when device is in operational mode and
+ * users in use, so need check it before disable it to
+ * avoid unbalance warning.
+ */
+ if (pm_runtime_enabled(dev))
+ pm_runtime_disable(dev);
+ disable_irq(client->irq);
+
+ /*
+ * Set trackpad device to idle mode if wakeup is allowed,
+ * otherwise turn off.
+ */
+ if (cyapa->operational) {
+ power_mode = device_may_wakeup(dev) ? cyapa->suspend_power_mode
+ : PWR_MODE_OFF;
+ error = cyapa->ops->set_power_mode(cyapa, power_mode,
+ cyapa->suspend_sleep_time, CYAPA_PM_SUSPEND);
+ if (error)
+ dev_err(dev, "suspend set power mode failed: %d\n",
+ error);
+ }
+
+ /*
+ * Disable proximity interrupt when system idle, want true touch to
+ * wake the system.
+ */
+ if (cyapa->dev_pwr_mode != PWR_MODE_OFF)
+ cyapa->ops->set_proximity(cyapa, false);
+
+ if (device_may_wakeup(dev))
+ cyapa->irq_wake = (enable_irq_wake(client->irq) == 0);
+
+ mutex_unlock(&cyapa->state_sync_lock);
+ return 0;
+}
+
+static int __maybe_unused cyapa_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct cyapa *cyapa = i2c_get_clientdata(client);
+ int error;
+
+ mutex_lock(&cyapa->state_sync_lock);
+
+ if (device_may_wakeup(dev) && cyapa->irq_wake) {
+ disable_irq_wake(client->irq);
+ cyapa->irq_wake = false;
+ }
+
+ /*
+ * Update device states and runtime PM states.
+ * Re-Enable proximity interrupt after enter operational mode.
+ */
+ error = cyapa_reinitialize(cyapa);
+ if (error)
+ dev_warn(dev, "failed to reinitialize TP device: %d\n", error);
+
+ enable_irq(client->irq);
+
+ mutex_unlock(&cyapa->state_sync_lock);
+ return 0;
+}
+
+static int __maybe_unused cyapa_runtime_suspend(struct device *dev)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ int error;
+
+ error = cyapa->ops->set_power_mode(cyapa,
+ cyapa->runtime_suspend_power_mode,
+ cyapa->runtime_suspend_sleep_time,
+ CYAPA_PM_RUNTIME_SUSPEND);
+ if (error)
+ dev_warn(dev, "runtime suspend failed: %d\n", error);
+
+ return 0;
+}
+
+static int __maybe_unused cyapa_runtime_resume(struct device *dev)
+{
+ struct cyapa *cyapa = dev_get_drvdata(dev);
+ int error;
+
+ error = cyapa->ops->set_power_mode(cyapa,
+ PWR_MODE_FULL_ACTIVE, 0, CYAPA_PM_RUNTIME_RESUME);
+ if (error)
+ dev_warn(dev, "runtime resume failed: %d\n", error);
+
+ return 0;
+}
+
+static const struct dev_pm_ops cyapa_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(cyapa_suspend, cyapa_resume)
+ SET_RUNTIME_PM_OPS(cyapa_runtime_suspend, cyapa_runtime_resume, NULL)
+};
+
+static const struct i2c_device_id cyapa_id_table[] = {
+ { "cyapa", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, cyapa_id_table);
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id cyapa_acpi_id[] = {
+ { "CYAP0000", 0 }, /* Gen3 trackpad with 0x67 I2C address. */
+ { "CYAP0001", 0 }, /* Gen5 trackpad with 0x24 I2C address. */
+ { "CYAP0002", 0 }, /* Gen6 trackpad with 0x24 I2C address. */
+ { }
+};
+MODULE_DEVICE_TABLE(acpi, cyapa_acpi_id);
+#endif
+
+#ifdef CONFIG_OF
+static const struct of_device_id cyapa_of_match[] = {
+ { .compatible = "cypress,cyapa" },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, cyapa_of_match);
+#endif
+
+static struct i2c_driver cyapa_driver = {
+ .driver = {
+ .name = "cyapa",
+ .pm = &cyapa_pm_ops,
+ .acpi_match_table = ACPI_PTR(cyapa_acpi_id),
+ .of_match_table = of_match_ptr(cyapa_of_match),
+ },
+
+ .probe = cyapa_probe,
+ .id_table = cyapa_id_table,
+};
+
+module_i2c_driver(cyapa_driver);
+
+MODULE_DESCRIPTION("Cypress APA I2C Trackpad Driver");
+MODULE_AUTHOR("Dudley Du <dudl@cypress.com>");
+MODULE_LICENSE("GPL");