Add initial support for the AT42QT1050 (QT1050) device. The device
supports up to five input keys, dependent on the mode. Since it adds only
the initial support the "1 to 4 keys plus Guard Channel" mode isn't
support.
Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx>
---
.../bindings/input/microchip,qt1050.txt | 54 ++
drivers/input/keyboard/Kconfig | 11 +
drivers/input/keyboard/Makefile | 1 +
drivers/input/keyboard/qt1050.c | 589 ++++++++++++++++++
4 files changed, 655 insertions(+)
create mode 100644 Documentation/devicetree/bindings/input/microchip,qt1050.txt
create mode 100644 drivers/input/keyboard/qt1050.c
diff --git a/Documentation/devicetree/bindings/input/microchip,qt1050.txt b/Documentation/devicetree/bindings/input/microchip,qt1050.txt
new file mode 100644
index 000000000000..d63e286f6526
--- /dev/null
+++ b/Documentation/devicetree/bindings/input/microchip,qt1050.txt
@@ -0,0 +1,54 @@
+Microchip AT42QT1050 Five-channel Touch Sensor IC
+
+The AT42QT1050 (QT1050) is a QTouchADC sensor driver. The device can sense from
+one to five keys, dependent on mode. The QT1050 includes all signal processing
+functions necessary to provide stable sensing under a wide variety of changing
+conditions, and the outputs are fully debounced.
+
+The touchkey device node should be placed inside an I2C bus node.
+
+Required properties:
+- compatible: Must be "microchip,qt1050"
+- reg: The I2C address of the touchkeys
+- interrupts: The sink for the touchpad's IRQ output,
+ see ../interrupt-controller/interrupts.txt
+- linux,keycodes: Specifies an array of numeric keycode values to be used for
+ reporting button presses. The array can contain up to 5 entries. Array index
+ 0 correspond to key 0 and so on. If the keys aren't continuous the
+ KEY_RESERVED must be used. Keys marked as KEY_RESERVED or not specified will
+ be disabled.
+
+Optional properties:
+- pre-charge-time: Specifies an array of precharge times in ns for each touch
+ pad. The value for each pad depend on the hardware layouts. If not specified
+ or invalid values are specified the default value is taken.
+ Valid value range [ns]: 0 - 637500; values must be a multiple of 2500;
+ default is 0.
+- touchscreen-average-samples: Please see ../input/touchscreen/touchscreen.txt
+ for more information. Unlike the general binding, this is an array to specify
+ the samples for each pad. If not specified or invalid values are specified
+ the default value is taken.
+ Valid values: 1, 4, 16, 64, 256, 1024, 4096, 16384; default is 1.
+- touchscreen-pre-scaling: Please see ../input/touchscreen/touchscreen.txt for
+ more information. Unlike the general binding, this is an array to specify the
+ scaling factor for each pad. If not specified or invalid values are specified
+ the default value is taken.
+ Valid values: 1, 2, 4, 8, 16, 32, 64, 128; default is 1.
+- touchscreen-fuzz-pressure: Please see ../input/touchscreen/touchscreen.txt for
+ more information. Unlike the general binding, this is an array to specify the
+ noise (threshold) value for each pad. If not specified or invalid values are
+ specified the default value is taken.
+ Valid value range: 0 - 255; default is 20.
+
+Example:
+QT1050 with 3 non continuous key, key3 and key5 are disabled.
+
+touchkeys@41 {
+ compatible = "microchip,qt1050";
+ reg = <0x41>;
+ interrupt-parent = <&gpio0>;
+ interrupts = <17 IRQ_TYPE_EDGE_FALLING>;
+ linux,keycodes = <KEY_UP>, <KEY_RIGHT>, <KEY_RESERVED>, <KEY_DOWN>;
+ touchscreen-average-samples = <64>, <64>, <64>, <256>;
+ touchscreen-pre-scaling = <16>, <8>, <16>, <16>;
+};
diff --git a/drivers/input/keyboard/Kconfig b/drivers/input/keyboard/Kconfig
index 4713957b0cbb..08aba5e7cd93 100644
--- a/drivers/input/keyboard/Kconfig
+++ b/drivers/input/keyboard/Kconfig
@@ -137,6 +137,17 @@ config KEYBOARD_ATKBD_RDI_KEYCODES
right-hand column will be interpreted as the key shown in the
left-hand column.
+config KEYBOARD_QT1050
+ tristate "Microchip AT42QT1050 Touch Sensor Chip"
+ depends on I2C
+ select REGMAP_I2C
+ help
+ Say Y here if you want to use Microchip AT42QT1050 QTouch
+ Sensor chip as input device.
+
+ To compile this driver as a module, choose M here:
+ the module will be called qt1050
+
config KEYBOARD_QT1070
tristate "Atmel AT42QT1070 Touch Sensor Chip"
depends on I2C
diff --git a/drivers/input/keyboard/Makefile b/drivers/input/keyboard/Makefile
index 182e92985dbf..f0291ca39f62 100644
--- a/drivers/input/keyboard/Makefile
+++ b/drivers/input/keyboard/Makefile
@@ -50,6 +50,7 @@ obj-$(CONFIG_KEYBOARD_OPENCORES) += opencores-kbd.o
obj-$(CONFIG_KEYBOARD_PMIC8XXX) += pmic8xxx-keypad.o
obj-$(CONFIG_KEYBOARD_PXA27x) += pxa27x_keypad.o
obj-$(CONFIG_KEYBOARD_PXA930_ROTARY) += pxa930_rotary.o
+obj-$(CONFIG_KEYBOARD_QT1050) += qt1050.o
obj-$(CONFIG_KEYBOARD_QT1070) += qt1070.o
obj-$(CONFIG_KEYBOARD_QT2160) += qt2160.o
obj-$(CONFIG_KEYBOARD_SAMSUNG) += samsung-keypad.o
diff --git a/drivers/input/keyboard/qt1050.c b/drivers/input/keyboard/qt1050.c
new file mode 100644
index 000000000000..80415586955d
--- /dev/null
+++ b/drivers/input/keyboard/qt1050.c
@@ -0,0 +1,589 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Microchip AT42QT1050 QTouch Sensor Controller
+ *
+ * Authors: Marco Felsch <kernel@xxxxxxxxxxxxxx>
+ *
+ * Base on AT42QT1070 driver by:
+ * Bo Shen <voice.shen@xxxxxxxxx>
+ * Copyright (C) 2011 Atmel
+ */
+
+#include <linux/delay.h>
+#include <linux/i2c.h>
+#include <linux/input.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/log2.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+
+/* Chip ID */
+#define QT1050_CHIP_ID 0x00
+#define QT1050_CHIP_ID_VER 0x46
+
+/* Firmware version */
+#define QT1050_FW_VERSION 0x01
+
+/* Detection status */
+#define QT1050_DET_STATUS 0x02
+
+/* Key status */
+#define QT1050_KEY_STATUS 0x03
+
+/* Key Signals */
+#define QT1050_KEY_SIGNAL_0_MSB 0x06
+#define QT1050_KEY_SIGNAL_0_LSB 0x07
+#define QT1050_KEY_SIGNAL_1_MSB 0x08
+#define QT1050_KEY_SIGNAL_1_LSB 0x09
+#define QT1050_KEY_SIGNAL_2_MSB 0x0c
+#define QT1050_KEY_SIGNAL_2_LSB 0x0d
+#define QT1050_KEY_SIGNAL_3_MSB 0x0e
+#define QT1050_KEY_SIGNAL_3_LSB 0x0f
+#define QT1050_KEY_SIGNAL_4_MSB 0x10
+#define QT1050_KEY_SIGNAL_4_LSB 0x11
+
+/* Reference data */
+#define QT1050_REF_DATA_0_MSB 0x14
+#define QT1050_REF_DATA_0_LSB 0x15
+#define QT1050_REF_DATA_1_MSB 0x16
+#define QT1050_REF_DATA_1_LSB 0x17
+#define QT1050_REF_DATA_2_MSB 0x1a
+#define QT1050_REF_DATA_2_LSB 0x1b
+#define QT1050_REF_DATA_3_MSB 0x1c
+#define QT1050_REF_DATA_3_LSB 0x1d
+#define QT1050_REF_DATA_4_MSB 0x1e
+#define QT1050_REF_DATA_4_LSB 0x1f
+
+/* Negative threshold level */
+#define QT1050_NTHR_0 0x21
+#define QT1050_NTHR_1 0x22
+#define QT1050_NTHR_2 0x24
+#define QT1050_NTHR_3 0x25
+#define QT1050_NTHR_4 0x26
+
+/* Pulse / Scale */
+#define QT1050_PULSE_SCALE_0 0x28
+#define QT1050_PULSE_SCALE_1 0x29
+#define QT1050_PULSE_SCALE_2 0x2b
+#define QT1050_PULSE_SCALE_3 0x2c
+#define QT1050_PULSE_SCALE_4 0x2d
+
+/* Detection integrator counter / AKS */
+#define QT1050_DI_AKS_0 0x2f
+#define QT1050_DI_AKS_1 0x30
+#define QT1050_DI_AKS_2 0x32
+#define QT1050_DI_AKS_3 0x33
+#define QT1050_DI_AKS_4 0x34
+
+/* Charge Share Delay */
+#define QT1050_CSD_0 0x36
+#define QT1050_CSD_1 0x37
+#define QT1050_CSD_2 0x39
+#define QT1050_CSD_3 0x3a
+#define QT1050_CSD_4 0x3b
+
+/* Low Power Mode */
+#define QT1050_LPMODE 0x3d
+
+/* Calibration and Reset */
+#define QT1050_RES_CAL 0x3f
+#define QT1050_RES_CAL_RESET BIT(7)
+#define QT1050_RES_CAL_CALIBRATE BIT(1)
+
+#define QT1050_MAX_KEYS 5
+#define QT1050_RESET_TIME 255
+
+struct qt1050_key {
+ u32 charge_delay;
+ u32 thr_cnt;
+ u32 samples;
+ u32 scale;
+ u16 keycode;
+};
+
+struct qt1050_priv {
+ struct i2c_client *client;
+ struct input_dev *input;
+ struct regmap *regmap;
+ struct qt1050_key keys[QT1050_MAX_KEYS];
+ unsigned short keycodes[QT1050_MAX_KEYS];
+ u8 last_keys;
+};
+
+static bool qt1050_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case QT1050_DET_STATUS:
+ case QT1050_KEY_STATUS:
+ case QT1050_KEY_SIGNAL_0_MSB:
+ case QT1050_KEY_SIGNAL_0_LSB:
+ case QT1050_KEY_SIGNAL_1_MSB:
+ case QT1050_KEY_SIGNAL_1_LSB:
+ case QT1050_KEY_SIGNAL_2_MSB:
+ case QT1050_KEY_SIGNAL_2_LSB:
+ case QT1050_KEY_SIGNAL_3_MSB:
+ case QT1050_KEY_SIGNAL_3_LSB:
+ case QT1050_KEY_SIGNAL_4_MSB:
+ case QT1050_KEY_SIGNAL_4_LSB:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_range qt1050_readable_ranges[] = {
+ regmap_reg_range(QT1050_CHIP_ID, QT1050_KEY_STATUS),
+ regmap_reg_range(QT1050_KEY_SIGNAL_0_MSB, QT1050_KEY_SIGNAL_1_LSB),
+ regmap_reg_range(QT1050_KEY_SIGNAL_2_MSB, QT1050_KEY_SIGNAL_4_LSB),
+ regmap_reg_range(QT1050_REF_DATA_0_MSB, QT1050_REF_DATA_1_LSB),
+ regmap_reg_range(QT1050_REF_DATA_2_MSB, QT1050_REF_DATA_4_LSB),
+ regmap_reg_range(QT1050_NTHR_0, QT1050_NTHR_1),
+ regmap_reg_range(QT1050_NTHR_2, QT1050_NTHR_4),
+ regmap_reg_range(QT1050_PULSE_SCALE_0, QT1050_PULSE_SCALE_1),
+ regmap_reg_range(QT1050_PULSE_SCALE_2, QT1050_PULSE_SCALE_4),
+ regmap_reg_range(QT1050_DI_AKS_0, QT1050_DI_AKS_1),
+ regmap_reg_range(QT1050_DI_AKS_2, QT1050_DI_AKS_4),
+ regmap_reg_range(QT1050_CSD_0, QT1050_CSD_1),
+ regmap_reg_range(QT1050_CSD_2, QT1050_RES_CAL),
+};
+
+static const struct regmap_access_table qt1050_readable_table = {
+ .yes_ranges = qt1050_readable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(qt1050_readable_ranges),
+};
+
+static const struct regmap_range qt1050_writeable_ranges[] = {
+ regmap_reg_range(QT1050_NTHR_0, QT1050_NTHR_1),
+ regmap_reg_range(QT1050_NTHR_2, QT1050_NTHR_4),
+ regmap_reg_range(QT1050_PULSE_SCALE_0, QT1050_PULSE_SCALE_1),
+ regmap_reg_range(QT1050_PULSE_SCALE_2, QT1050_PULSE_SCALE_4),
+ regmap_reg_range(QT1050_DI_AKS_0, QT1050_DI_AKS_1),
+ regmap_reg_range(QT1050_DI_AKS_2, QT1050_DI_AKS_4),
+ regmap_reg_range(QT1050_CSD_0, QT1050_CSD_1),
+ regmap_reg_range(QT1050_CSD_2, QT1050_RES_CAL),
+};
+
+static const struct regmap_access_table qt1050_writeable_table = {
+ .yes_ranges = qt1050_writeable_ranges,
+ .n_yes_ranges = ARRAY_SIZE(qt1050_writeable_ranges),
+};
+
+static struct regmap_config qt1050_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .max_register = QT1050_RES_CAL,
+
+ .cache_type = REGCACHE_RBTREE,
+
+ .wr_table = &qt1050_writeable_table,
+ .rd_table = &qt1050_readable_table,
+ .volatile_reg = qt1050_volatile_reg,
+};
+
+static bool qt1050_identify(struct qt1050_priv *ts)
+{
+ unsigned int val;
+
+ /* Read Chip ID */
+ regmap_read(ts->regmap, QT1050_CHIP_ID, &val);
+ if (val != QT1050_CHIP_ID_VER) {
+ dev_err(&ts->client->dev, "ID %d not supported\n", val);
+ return false;
+ }
+
+ /* Read firmware version */
+ regmap_read(ts->regmap, QT1050_FW_VERSION, &val);
+ if (val < 0) {
+ dev_err(&ts->client->dev, "could not read the firmware version\n");
+ return false;
+ }
+
+ dev_info(&ts->client->dev, "AT42QT1050 firmware version %1d.%1d\n",
+ val >> 4, val & 0xf);
+
+ return true;
+}
+
+static irqreturn_t qt1050_irq_threaded(int irq, void *dev_id)
+{
+ struct qt1050_priv *ts = dev_id;
+ struct input_dev *input = ts->input;
+ unsigned long new_keys, changed;
+ unsigned int val;
+ int i, err;
+
+ /* Read the detected status register, thus clearing interrupt */
+ err = regmap_read(ts->regmap, QT1050_DET_STATUS, &val);
+ if (err) {
+ dev_err(&ts->client->dev, "Fail to read detection status: %d\n",
+ err);
+ return IRQ_NONE;
+ }
+
+ /* Read which key changed, keys are not continuous */
+ err = regmap_read(ts->regmap, QT1050_KEY_STATUS, &val);
+ if (err) {
+ dev_err(&ts->client->dev,
+ "Fail to determine the key status: %d\n", err);
+ return IRQ_NONE;
+ }
+ new_keys = (val & 0x70) >> 2 | (val & 0x6) >> 1;
+ changed = ts->last_keys ^ new_keys;
+
+ for_each_set_bit(i, &changed, 8) {
+ input_report_key(input, ts->keycodes[i],
+ test_bit(i, &new_keys));
+ }
+
+ ts->last_keys = new_keys;
+ input_sync(input);
+
+ return IRQ_HANDLED;
+}
+
+static int qt1050_disable_key(struct regmap *map, int number)
+{
+ unsigned int reg;
+
+ switch (number) {
+ case 0:
+ reg = QT1050_DI_AKS_0;
+ break;
+ case 1:
+ reg = QT1050_DI_AKS_1;
+ break;
+ case 2:
+ reg = QT1050_DI_AKS_2;
+ break;
+ case 3:
+ reg = QT1050_DI_AKS_3;
+ break;
+ case 4:
+ reg = QT1050_DI_AKS_4;
+ break;
+ }
+
+ return regmap_update_bits(map, reg, 0xfc, 0x00);
+}
+
+#ifdef CONFIG_OF
+static int qt1050_set_dt_data(struct qt1050_priv *ts)
+{
+ struct regmap *map = ts->regmap;
+ struct qt1050_key *k;
+ int i, err;
+ unsigned int pulsc_reg, csd_reg, nthr_reg;
+
+ for (i = 0; i < QT1050_MAX_KEYS; i++) {
+ k = &ts->keys[i];
+ /* disable all keys which are marked as KEY_RESERVED */
+ if (k->keycode == KEY_RESERVED) {
+ err = qt1050_disable_key(map, i);
+ if (err)
+ return err;
+ continue;
+ }
+
+ switch (i) {
+ case 0:
+ pulsc_reg = QT1050_PULSE_SCALE_0;
+ csd_reg = QT1050_CSD_0;
+ nthr_reg = QT1050_NTHR_0;
+ break;
+ case 1:
+ pulsc_reg = QT1050_PULSE_SCALE_1;
+ csd_reg = QT1050_CSD_1;
+ nthr_reg = QT1050_NTHR_1;
+ break;
+ case 2:
+ pulsc_reg = QT1050_PULSE_SCALE_1;
+ csd_reg = QT1050_CSD_2;
+ nthr_reg = QT1050_NTHR_2;
+ break;
+ case 3:
+ pulsc_reg = QT1050_PULSE_SCALE_3;
+ csd_reg = QT1050_CSD_3;
+ nthr_reg = QT1050_NTHR_3;
+ break;
+ case 4:
+ pulsc_reg = QT1050_PULSE_SCALE_4;
+ csd_reg = QT1050_CSD_4;
+ nthr_reg = QT1050_NTHR_4;
+ break;
+ }
+
+ err = regmap_write(map, pulsc_reg,
+ (k->samples << 4) | (k->scale));
+ if (err)
+ return err;
+ err = regmap_write(map, csd_reg, k->charge_delay);
+ if (err)
+ return err;
+ err = regmap_write(map, nthr_reg, k->thr_cnt);
+ if (err)
+ return err;
+ }
+
+ return 0;
+}
+
+static int qt1050_parse_dt(struct qt1050_priv *ts)
+{
+ struct device *dev = &ts->client->dev;
+ struct device_node *node = dev->of_node;
+ int ret, i, n_keys;
+ u32 tmp[QT1050_MAX_KEYS];
+
+ ret = of_property_read_variable_u32_array(node, "linux,keycodes",
+ &tmp[0], 1,
+ QT1050_MAX_KEYS);
+
+ /*
+ * remaining keys are mapped to KEY_RESERVED in case of
+ * n_keys < QT1050_MAX_KEYS
+ */
+ n_keys = ret;
+ for (i = 0; i < n_keys; i++) {
+ if (tmp[i] >= KEY_MAX) {
+ dev_err(dev, "wrong keycode 0x%x\n", tmp[i]);
+ return -EINVAL;
+ }
+ ts->keys[i].keycode = (u16)tmp[i];
+ }
+
+ ret = of_property_read_variable_u32_array(node, "pre-charge-time",
+ &tmp[0], 1, QT1050_MAX_KEYS);
+ if (!IS_ERR_VALUE(ret)) {
+ for (i = 0; i < QT1050_MAX_KEYS; i++) {
+ if (i < n_keys && (tmp[i] % 2500 == 0))
+ ts->keys[i].charge_delay = tmp[i] / 2500;
+ else
+ ts->keys[i].charge_delay = 0;
+ }
+ }
+
+ ret = of_property_read_variable_u32_array(node,
+ "touchscreen-average-samples",
+ &tmp[0], 1, QT1050_MAX_KEYS);
+ if (!IS_ERR_VALUE(ret)) {
+ for (i = 0; i < QT1050_MAX_KEYS; i++) {
+ if (i < n_keys && is_power_of_2(tmp[i]))
+ ts->keys[i].samples = ilog2(tmp[i]);
+ else
+ ts->keys[i].samples = 0;
+ }
+ }
+
+ ret = of_property_read_variable_u32_array(node,
+ "touchscreen-pre-scaling",
+ &tmp[0], 1, QT1050_MAX_KEYS);
+ if (!IS_ERR_VALUE(ret)) {
+ for (i = 0; i < QT1050_MAX_KEYS; i++) {
+ if (i < n_keys && is_power_of_2(tmp[i]))
+ ts->keys[i].scale = ilog2(tmp[i]);
+ else
+ ts->keys[i].scale = 0;
+ }
+ }
+
+ ret = of_property_read_variable_u32_array(node,
+ "touchscreen-fuzz-pressure",
+ &tmp[0], 1, QT1050_MAX_KEYS);
+ if (!IS_ERR_VALUE(ret))
+ for (i = 0; i < QT1050_MAX_KEYS; i++)
+ ts->keys[i].thr_cnt = i < n_keys ? tmp[i] : 20;
+
+ return 0;
+}
+#endif
+
+static int qt1050_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct qt1050_priv *ts;
+ struct input_dev *input;
+ struct device *dev = &client->dev;
+ struct regmap *map;
+ unsigned int status;
+ int i;
+ int err;
+
+ /* Check basic functionality */
+ err = i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE);
+ if (!err) {
+ dev_err(&client->dev, "%s adapter not supported\n",
+ dev_driver_string(&client->adapter->dev));
+ return -ENODEV;
+ }
+
+ if (!client->irq) {
+ dev_err(dev, "assign a irq line to this device\n");
+ return -EINVAL;
+ }
+
+ ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
+ input = devm_input_allocate_device(dev);
+ if (!ts || !input) {
+ dev_err(dev, "insufficient memory\n");
+ return -ENOMEM;
+ }
+
+ map = devm_regmap_init_i2c(client, &qt1050_regmap_config);
+ if (IS_ERR(map))
+ return PTR_ERR(map);
+
+ ts->client = client;
+ ts->input = input;
+ ts->regmap = map;
+
+ i2c_set_clientdata(client, ts);
+
+ /* Identify the qt1050 chip */
+ if (!qt1050_identify(ts))
+ return -ENODEV;
+
+ if (IS_ENABLED(CONFIG_OF)) {
+ err = qt1050_parse_dt(ts);
+ if (err) {
+ dev_err(dev, "Failed to parse dt: %d\n", err);
+ return err;
+ }
+ } else {
+ /* init each key with a valid code */
+ for (i = 0; i < QT1050_MAX_KEYS; i++)
+ ts->keys[i].keycode = KEY_1 + i;
+ }
+
+ input->name = "AT42QT1050 QTouch Sensor";
+ input->dev.parent = &client->dev;
+ input->id.bustype = BUS_I2C;
+
+ /* Add the keycode */
+ input->keycode = ts->keycodes;
+ input->keycodesize = sizeof(ts->keycodes[0]);
+ input->keycodemax = QT1050_MAX_KEYS;
+
+ __set_bit(EV_KEY, input->evbit);
+ for (i = 0; i < QT1050_MAX_KEYS; i++) {
+ ts->keycodes[i] = ts->keys[i].keycode;
+ __set_bit(ts->keycodes[i], input->keybit);
+ }
+
+ /* Trigger re-calibration */
+ err = regmap_update_bits(ts->regmap, QT1050_RES_CAL, 0x7f,
+ QT1050_RES_CAL_CALIBRATE);
+ if (err) {
+ dev_err(dev, "Trigger calibration failed: %d\n", err);
+ return err;
+ }
+ err = regmap_read_poll_timeout(ts->regmap, QT1050_DET_STATUS, status,
+ status >> 7 == 1, 10000, 200000);
+ if (err) {
+ dev_err(dev, "Calibration failed: %d\n", err);
+ return err;
+ }
+
+ /* Soft reset to set defaults */
+ err = regmap_update_bits(ts->regmap, QT1050_RES_CAL,
+ QT1050_RES_CAL_RESET, QT1050_RES_CAL_RESET);
+ if (err) {
+ dev_err(dev, "Trigger soft reset failed: %d\n", err);
+ return err;
+ }
+ msleep(QT1050_RESET_TIME);
+
+ /* Set dt specified data */
+ if (IS_ENABLED(CONFIG_OF)) {
+ err = qt1050_set_dt_data(ts);
+ if (err) {
+ dev_err(dev, "Failed to set dt data: %d\n", err);
+ return err;
+ }
+ }
+
+ err = devm_request_threaded_irq(dev, client->irq, NULL,
+ qt1050_irq_threaded,
+ IRQF_TRIGGER_NONE | IRQF_ONESHOT,
+ "qt1050", ts);
+ if (err) {
+ dev_err(&client->dev, "Failed to request irq: %d\n", err);
+ return err;
+ }
+
+ /* clear #CHANGE line */
+ err = regmap_read(ts->regmap, QT1050_DET_STATUS, &status);
+ if (err) {
+ dev_err(dev, "Failed to clear #CHANGE line level: %d\n", err);
+ return err;
+ }
+
+ /* Register the input device */
+ err = input_register_device(ts->input);
+ if (err) {
+ dev_err(&client->dev, "Failed to register input device: %d\n",
+ err);
+ return err;
+ }
+
+ return 0;
+}
+
+static int __maybe_unused qt1050_suspend(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct qt1050_priv *ts = i2c_get_clientdata(client);
+
+ disable_irq(client->irq);
+
+ if (device_may_wakeup(dev))
+ enable_irq_wake(client->irq);
+
+ return regmap_write(ts->regmap, QT1050_LPMODE, 0x00);
+}
+
+static int __maybe_unused qt1050_resume(struct device *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct qt1050_priv *ts = i2c_get_clientdata(client);
+
+ if (device_may_wakeup(dev))
+ disable_irq_wake(client->irq);
+
+ enable_irq(client->irq);
+
+ return regmap_write(ts->regmap, QT1050_LPMODE, 0x02);
+}
+
+static SIMPLE_DEV_PM_OPS(qt1050_pm_ops, qt1050_suspend, qt1050_resume);
+
+static const struct i2c_device_id qt1050_id[] = {
+ { "qt1050", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(i2c, qt1050_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id qt1050_of_match[] = {
+ { .compatible = "microchip,qt1050", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, qt1050_of_match);
+#endif
+
+static struct i2c_driver qt1050_driver = {
+ .driver = {
+ .name = "qt1050",
+ .of_match_table = of_match_ptr(qt1050_of_match),
+ .pm = &qt1050_pm_ops,
+ },
+ .probe = qt1050_probe,
+ .id_table = qt1050_id,
+};
+
+module_i2c_driver(qt1050_driver);
+
+MODULE_AUTHOR("Marco Felsch <kernel@xxxxxxxxxxxxxx");
+MODULE_DESCRIPTION("Driver for AT42QT1050 QTouch sensor");
+MODULE_LICENSE("GPL");
--
2.19.0
