* [PATCH v2] iio: accel: kxcjk1013 3-axis accelerometer driver
2014-06-05 19:31 [PATCH v2] iio: accel: kxcjk1013 3-axis accelerometer driver Srinivas Pandruvada
@ 2014-06-05 19:31 ` Srinivas Pandruvada
0 siblings, 0 replies; 2+ messages in thread
From: Srinivas Pandruvada @ 2014-06-05 19:31 UTC (permalink / raw)
To: jic23; +Cc: linux-iio, Srinivas Pandruvada
This patch adds IIO driver for KXCJK 1013 triaxis accelerometer sensor.
The specifications for this driver is downloaded from:
http://www.kionix.com/sites/default/files/KXCJK-1013%20Specifications%20Rev%202.pdf
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
---
drivers/iio/accel/Kconfig | 12 +
drivers/iio/accel/Makefile | 1 +
drivers/iio/accel/kxcjk-1013.c | 729 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 742 insertions(+)
create mode 100644 drivers/iio/accel/kxcjk-1013.c
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig
index 1e120fa..12addf2 100644
--- a/drivers/iio/accel/Kconfig
+++ b/drivers/iio/accel/Kconfig
@@ -77,4 +77,16 @@ config MMA8452
To compile this driver as a module, choose M here: the module
will be called mma8452.
+config KXCJK1013
+ tristate "Kionix 3-Axis Accelerometer Driver"
+ depends on I2C
+ select IIO_BUFFER
+ select IIO_TRIGGERED_BUFFER
+ help
+ Say Y here if you want to build a driver for the Kionix KXCJK-1013
+ triaxial acceleration sensor.
+
+ To compile this driver as a module, choose M here: the module will
+ be called kxcjk-1013.
+
endmenu
diff --git a/drivers/iio/accel/Makefile b/drivers/iio/accel/Makefile
index dc0e379..6578ca1 100644
--- a/drivers/iio/accel/Makefile
+++ b/drivers/iio/accel/Makefile
@@ -5,6 +5,7 @@
# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_BMA180) += bma180.o
obj-$(CONFIG_HID_SENSOR_ACCEL_3D) += hid-sensor-accel-3d.o
+obj-$(CONFIG_KXCJK1013) += kxcjk-1013.o
obj-$(CONFIG_KXSD9) += kxsd9.o
obj-$(CONFIG_MMA8452) += mma8452.o
diff --git a/drivers/iio/accel/kxcjk-1013.c b/drivers/iio/accel/kxcjk-1013.c
new file mode 100644
index 0000000..6c28e50
--- /dev/null
+++ b/drivers/iio/accel/kxcjk-1013.c
@@ -0,0 +1,729 @@
+/*
+ * KXCJK-1013 3-axis accelerometer driver
+ * Copyright (c) 2014, Intel Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ */
+
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/bitops.h>
+#include <linux/slab.h>
+#include <linux/string.h>
+#include <linux/acpi.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/iio/buffer.h>
+#include <linux/iio/trigger.h>
+#include <linux/iio/trigger_consumer.h>
+#include <linux/iio/triggered_buffer.h>
+
+#define KXCJK1013_DRV_NAME "kxcjk1013"
+#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
+
+#define KXCJK1013_REG_XOUT_L 0x06
+/*
+ * From low byte X axis register, all the other addresses of Y and Z can be
+ * obtained by just applying axis offset. The following axis defines are just
+ * provide clarity, but not used.
+ */
+#define KXCJK1013_REG_XOUT_H 0x07
+#define KXCJK1013_REG_YOUT_L 0x08
+#define KXCJK1013_REG_YOUT_H 0x09
+#define KXCJK1013_REG_ZOUT_L 0x0A
+#define KXCJK1013_REG_ZOUT_H 0x0B
+
+#define KXCJK1013_REG_DCST_RESP 0x0C
+#define KXCJK1013_REG_WHO_AM_I 0x0F
+#define KXCJK1013_REG_INT_SRC1 0x16
+#define KXCJK1013_REG_INT_SRC2 0x17
+#define KXCJK1013_REG_STATUS_REG 0x18
+#define KXCJK1013_REG_INT_REL 0x1A
+#define KXCJK1013_REG_CTRL1 0x1B
+#define KXCJK1013_REG_CTRL2 0x1D
+#define KXCJK1013_REG_INT_CTRL1 0x1E
+#define KXCJK1013_REG_INT_CTRL2 0x1F
+#define KXCJK1013_REG_DATA_CTRL 0x21
+#define KXCJK1013_REG_WAKE_TIMER 0x29
+#define KXCJK1013_REG_SELF_TEST 0x3A
+#define KXCJK1013_REG_WAKE_THRES 0x6A
+
+#define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
+#define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
+#define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
+#define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
+#define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
+#define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4)
+#define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5)
+
+#define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
+#define KXCJK1013_MAX_STARTUP_TIME_US 100000
+
+struct kxcjk1013_data {
+ struct i2c_client *client;
+ struct iio_trigger *trig;
+ bool trig_mode;
+ struct mutex mutex;
+ s16 buffer[3];
+ atomic_t power_state;
+ int gpio_irq;
+ u8 odr_bits;
+};
+
+enum kxcjk1013_axis {
+ AXIS_X,
+ AXIS_Y,
+ AXIS_Z,
+};
+
+enum kxcjk1013_mode {
+ STANDBY,
+ OPERATION,
+};
+
+static const struct {
+ int val;
+ int val2;
+ int odr_bits;
+} samp_freq_table[] = { {0, 781, 0x08}, {1, 563, 0x09},
+ {3, 125, 0x0A}, {6, 25, 0x0B}, {12, 5, 0},
+ {25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
+ {200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
+ {1600, 0, 0x07} };
+
+/* Refer to section 4 of the specification */
+static const struct {
+ int odr_bits;
+ int usec;
+} odr_start_up_times[] = { {0x08, 100000}, {0x09, 100000},
+ {0x0A, 100000}, {0x0B, 100000}, { 0, 80000},
+ {0x01, 41000}, {0x02, 21000}, {0x03, 11000},
+ {0x04, 6400}, {0x05, 3900}, {0x06, 2700},
+ {0x07, 2100} };
+
+static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
+ enum kxcjk1013_mode mode)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (mode == STANDBY)
+ ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
+ else
+ ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int kxcjk1013_chip_setup_polarity(struct kxcjk1013_data *data,
+ bool active_high)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+ return ret;
+ }
+
+ if (active_high)
+ ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
+ else
+ ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int kxcjk1013_chip_ack_intr(struct kxcjk1013_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_rel\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
+{
+ int ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading who_am_i\n");
+ return ret;
+ }
+
+ dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
+
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ /* Setting range to 4G */
+ ret |= KXCJK1013_REG_CTRL1_BIT_GSEL0;
+ ret &= ~KXCJK1013_REG_CTRL1_BIT_GSEL1;
+
+ /* Set 12 bit mode */
+ ret |= KXCJK1013_REG_CTRL1_BIT_RES;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
+ return ret;
+ }
+
+ data->odr_bits = ret;
+
+ /* Active high interrupt */
+ return kxcjk1013_chip_setup_polarity(data, true);
+}
+
+static int kxcjk1013_chip_setup_interrupt(struct kxcjk1013_data *data,
+ bool status)
+{
+ int ret;
+
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
+ else
+ ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
+ ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
+ return ret;
+ }
+
+ ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_CTRL1);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error reading reg_ctrl1\n");
+ return ret;
+ }
+
+ if (status)
+ ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
+ else
+ ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
+
+ ret = i2c_smbus_write_byte_data(data->client,
+ KXCJK1013_REG_CTRL1, ret);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing reg_ctrl1\n");
+ return ret;
+ }
+
+ return ret;
+}
+
+static int kxcjk1013_convert_freq_to_bit(int val, int val2)
+{
+ int i;
+
+ for (i = 0; ARRAY_SIZE(samp_freq_table); ++i) {
+ if (samp_freq_table[i].val == val &&
+ samp_freq_table[i].val2 == val2) {
+ return samp_freq_table[i].odr_bits;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
+{
+ int ret;
+ int odr_bits;
+
+ odr_bits = kxcjk1013_convert_freq_to_bit(val, val2 / 1000);
+ if (odr_bits < 0)
+ return odr_bits;
+
+ ret = kxcjk1013_set_mode(data, STANDBY);
+ if (ret < 0)
+ return ret;
+
+ ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
+ odr_bits);
+ if (ret < 0) {
+ dev_err(&data->client->dev, "Error writing data_ctrl\n");
+ return ret;
+ }
+
+ data->odr_bits = odr_bits;
+
+ return 0;
+}
+
+static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
+ if (samp_freq_table[i].odr_bits == data->odr_bits) {
+ *val = samp_freq_table[i].val;
+ *val2 = samp_freq_table[i].val2 * 1000;
+ return IIO_VAL_INT_PLUS_MICRO;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
+{
+ u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
+ int ret;
+
+ ret = i2c_smbus_read_word_data(data->client, reg);
+ if (ret < 0) {
+ dev_err(&data->client->dev,
+ "failed to read accel_%c registers\n", 'x' + axis);
+ return ret;
+ }
+
+ return ret;
+}
+
+static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(odr_start_up_times); ++i) {
+ if (odr_start_up_times[i].odr_bits == data->odr_bits)
+ return odr_start_up_times[i].usec;
+
+ }
+
+ return KXCJK1013_MAX_STARTUP_TIME_US;
+}
+
+static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int *val, int *val2,
+ long mask)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW:
+ mutex_lock(&data->mutex);
+ if (iio_buffer_enabled(indio_dev))
+ ret = -EBUSY;
+ else {
+ int sleep_val;
+
+ ret = kxcjk1013_set_mode(data, OPERATION);
+ if (ret < 0)
+ return ret;
+ atomic_inc(&data->power_state);
+ sleep_val = kxcjk1013_get_startup_times(data);
+ if (sleep_val < 20000)
+ usleep_range(sleep_val, 20000);
+ else
+ msleep_interruptible(sleep_val/1000);
+ ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
+ if (atomic_dec_and_test(&data->power_state))
+ kxcjk1013_set_mode(data, STANDBY);
+ }
+ mutex_unlock(&data->mutex);
+
+ if (ret < 0)
+ return ret;
+
+ *val = sign_extend32(ret >> 4, 11);
+ return IIO_VAL_INT;
+
+ case IIO_CHAN_INFO_SCALE:
+ *val = 0;
+ *val2 = 19163; /* range +-4g (4/2047*9.806650) */
+ return IIO_VAL_INT_PLUS_MICRO;
+
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_get_odr(data, val, val2);
+ mutex_unlock(&data->mutex);
+ return ret;
+
+ default:
+ return -EINVAL;
+ }
+}
+
+static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan, int val, int val2, long mask)
+{
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_SAMP_FREQ:
+ mutex_lock(&data->mutex);
+ ret = kxcjk1013_set_odr(data, val, val2);
+ mutex_unlock(&data->mutex);
+ break;
+ default:
+ ret = -EINVAL;
+ }
+
+ return ret;
+}
+
+static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
+ "0.781 1.563 3.125 6.25 12.5 25 50 100 200 400 800 1600");
+
+static struct attribute *kxcjk1013_attributes[] = {
+ &iio_const_attr_sampling_frequency_available.dev_attr.attr,
+ NULL,
+};
+
+static const struct attribute_group kxcjk1013_attrs_group = {
+ .attrs = kxcjk1013_attributes,
+};
+
+#define KXCJK1013_CHANNEL(_axis) { \
+ .type = IIO_ACCEL, \
+ .modified = 1, \
+ .channel2 = IIO_MOD_##_axis, \
+ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
+ BIT(IIO_CHAN_INFO_SAMP_FREQ), \
+ .scan_index = AXIS_##_axis, \
+ .scan_type = { \
+ .sign = 's', \
+ .realbits = 12, \
+ .storagebits = 16, \
+ .shift = 4, \
+ .endianness = IIO_LE, \
+ }, \
+}
+
+static const struct iio_chan_spec kxcjk1013_channels[] = {
+ KXCJK1013_CHANNEL(X),
+ KXCJK1013_CHANNEL(Y),
+ KXCJK1013_CHANNEL(Z),
+ IIO_CHAN_SOFT_TIMESTAMP(3),
+};
+
+static const struct iio_info kxcjk1013_info = {
+ .attrs = &kxcjk1013_attrs_group,
+ .read_raw = kxcjk1013_read_raw,
+ .write_raw = kxcjk1013_write_raw,
+ .driver_module = THIS_MODULE,
+};
+
+static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
+{
+ struct iio_poll_func *pf = p;
+ struct iio_dev *indio_dev = pf->indio_dev;
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+ int64_t time_ns = iio_get_time_ns();
+ int bit, ret, i = 0;
+
+ mutex_lock(&data->mutex);
+
+ for_each_set_bit(bit, indio_dev->buffer->scan_mask,
+ indio_dev->masklength) {
+ ret = kxcjk1013_get_acc_reg(data, bit);
+ if (ret < 0) {
+ kxcjk1013_chip_ack_intr(data);
+ mutex_unlock(&data->mutex);
+ goto err;
+ }
+ data->buffer[i++] = ret;
+ }
+
+ kxcjk1013_chip_ack_intr(data);
+
+ mutex_unlock(&data->mutex);
+
+ iio_push_to_buffers_with_timestamp(indio_dev, data->buffer, time_ns);
+err:
+ iio_trigger_notify_done(indio_dev->trig);
+
+ return IRQ_HANDLED;
+}
+
+static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
+ bool state)
+{
+ struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ if (state) {
+ kxcjk1013_chip_setup_interrupt(data, true);
+ kxcjk1013_set_mode(data, OPERATION);
+ atomic_inc(&data->power_state);
+ } else {
+ if (!atomic_dec_and_test(&data->power_state))
+ return 0;
+ kxcjk1013_chip_setup_interrupt(data, false);
+ kxcjk1013_set_mode(data, STANDBY);
+ }
+
+ return 0;
+}
+
+static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
+ .set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
+ .owner = THIS_MODULE,
+};
+
+static int kxcjk1013_acpi_gpio_probe(struct i2c_client *client,
+ struct kxcjk1013_data *data)
+{
+ const struct acpi_device_id *id;
+ struct device *dev;
+ struct gpio_desc *gpio;
+ int ret;
+
+ if (!client)
+ return -EINVAL;
+
+ dev = &client->dev;
+ if (!ACPI_HANDLE(dev))
+ return -ENODEV;
+
+ id = acpi_match_device(dev->driver->acpi_match_table, dev);
+ if (!id)
+ return -ENODEV;
+
+ /* data ready gpio interrupt pin */
+ gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);
+ if (IS_ERR(gpio)) {
+ dev_err(dev, "acpi gpio get index failed\n");
+ return PTR_ERR(gpio);
+ }
+
+ ret = gpiod_direction_input(gpio);
+ if (ret)
+ return ret;
+
+ ret = gpiod_to_irq(gpio);
+ if (ret < 0)
+ return ret;
+
+ data->gpio_irq = ret;
+
+ /* Update client irq if it is invalid */
+ if (client->irq < 0)
+ client->irq = data->gpio_irq;
+
+ dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio),
+ data->gpio_irq);
+
+ return 0;
+}
+
+static int kxcjk1013_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct kxcjk1013_data *data;
+ struct iio_dev *indio_dev;
+ struct iio_trigger *trig = NULL;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ data = iio_priv(indio_dev);
+ i2c_set_clientdata(client, indio_dev);
+ data->client = client;
+
+ ret = kxcjk1013_chip_init(data);
+ if (ret < 0)
+ return ret;
+
+ mutex_init(&data->mutex);
+
+ indio_dev->dev.parent = &client->dev;
+ indio_dev->channels = kxcjk1013_channels;
+ indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
+ indio_dev->name = KXCJK1013_DRV_NAME;
+ indio_dev->modes = INDIO_DIRECT_MODE;
+ indio_dev->info = &kxcjk1013_info;
+
+ kxcjk1013_acpi_gpio_probe(client, data);
+
+ if (client->irq < 0) {
+ kxcjk1013_chip_setup_interrupt(data, false);
+ goto skip_setup_trigger;
+ }
+
+ trig = iio_trigger_alloc("%s-dev%d", indio_dev->name, indio_dev->id);
+ if (!trig)
+ return -ENOMEM;
+
+ data->trig_mode = true;
+
+ ret = devm_request_irq(&client->dev, client->irq,
+ iio_trigger_generic_data_rdy_poll,
+ IRQF_TRIGGER_RISING, KXCJK1013_IRQ_NAME, trig);
+ if (ret) {
+ dev_err(&client->dev, "unable to request IRQ\n");
+ goto err_trigger_free;
+ }
+
+ trig->dev.parent = &client->dev;
+ trig->ops = &kxcjk1013_trigger_ops;
+ iio_trigger_set_drvdata(trig, indio_dev);
+ data->trig = trig;
+ indio_dev->trig = trig;
+
+ ret = iio_trigger_register(trig);
+ if (ret)
+ goto err_trigger_free;
+
+ ret = iio_triggered_buffer_setup(indio_dev, NULL,
+ kxcjk1013_trigger_handler, NULL);
+ if (ret < 0) {
+ dev_err(&client->dev, "iio triggered buffer setup failed\n");
+ goto err_trigger_unregister;
+ }
+
+skip_setup_trigger:
+ ret = devm_iio_device_register(&client->dev, indio_dev);
+ if (ret < 0) {
+ dev_err(&client->dev, "unable to register iio device\n");
+ if (data->trig_mode)
+ goto err_buffer_cleanup;
+ else
+ return ret;
+ }
+
+ return 0;
+
+err_buffer_cleanup:
+ iio_triggered_buffer_cleanup(indio_dev);
+err_trigger_unregister:
+ iio_trigger_unregister(trig);
+err_trigger_free:
+ iio_trigger_free(trig);
+
+ return ret;
+}
+
+static int kxcjk1013_remove(struct i2c_client *client)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(client);
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ if (data->trig_mode) {
+ iio_triggered_buffer_cleanup(indio_dev);
+ iio_trigger_unregister(data->trig);
+ iio_trigger_free(data->trig);
+ }
+
+ mutex_lock(&data->mutex);
+ kxcjk1013_set_mode(data, STANDBY);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int kxcjk1013_suspend(struct device *dev)
+{
+ struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
+ struct kxcjk1013_data *data = iio_priv(indio_dev);
+
+ mutex_lock(&data->mutex);
+ kxcjk1013_set_mode(data, STANDBY);
+ mutex_unlock(&data->mutex);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(kxcjk1013_pm_ops, kxcjk1013_suspend, NULL);
+#define KXCJK1013_PM_OPS (&kxcjk1013_pm_ops)
+#else
+#define KXCJK1013_PM_OPS NULL
+#endif
+
+static const struct acpi_device_id kx_acpi_match[] = {
+ {"KXCJ1013", 0},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
+
+static const struct i2c_device_id kxcjk1013_id[] = {
+ {"kxcjk1013", 0},
+ {}
+};
+
+MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
+
+static struct i2c_driver kxcjk1013_driver = {
+ .driver = {
+ .name = KXCJK1013_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(kx_acpi_match),
+ .pm = KXCJK1013_PM_OPS,
+ },
+ .probe = kxcjk1013_probe,
+ .remove = kxcjk1013_remove,
+ .id_table = kxcjk1013_id,
+};
+module_i2c_driver(kxcjk1013_driver);
+
+MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
--
1.7.11.7
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