| /* |
| * KMX61 - Kionix 6-axis Accelerometer/Magnetometer |
| * |
| * Copyright (c) 2014, Intel Corporation. |
| * |
| * This file is subject to the terms and conditions of version 2 of |
| * the GNU General Public License. See the file COPYING in the main |
| * directory of this archive for more details. |
| * |
| * IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F). |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/i2c.h> |
| #include <linux/acpi.h> |
| #include <linux/gpio/consumer.h> |
| #include <linux/interrupt.h> |
| #include <linux/pm.h> |
| #include <linux/pm_runtime.h> |
| #include <linux/iio/iio.h> |
| #include <linux/iio/sysfs.h> |
| #include <linux/iio/events.h> |
| #include <linux/iio/trigger.h> |
| #include <linux/iio/buffer.h> |
| #include <linux/iio/triggered_buffer.h> |
| #include <linux/iio/trigger_consumer.h> |
| |
| #define KMX61_DRV_NAME "kmx61" |
| #define KMX61_GPIO_NAME "kmx61_int" |
| #define KMX61_IRQ_NAME "kmx61_event" |
| |
| #define KMX61_REG_WHO_AM_I 0x00 |
| #define KMX61_REG_INS1 0x01 |
| #define KMX61_REG_INS2 0x02 |
| |
| /* |
| * three 16-bit accelerometer output registers for X/Y/Z axis |
| * we use only XOUT_L as a base register, all other addresses |
| * can be obtained by applying an offset and are provided here |
| * only for clarity. |
| */ |
| #define KMX61_ACC_XOUT_L 0x0A |
| #define KMX61_ACC_XOUT_H 0x0B |
| #define KMX61_ACC_YOUT_L 0x0C |
| #define KMX61_ACC_YOUT_H 0x0D |
| #define KMX61_ACC_ZOUT_L 0x0E |
| #define KMX61_ACC_ZOUT_H 0x0F |
| |
| /* |
| * one 16-bit temperature output register |
| */ |
| #define KMX61_TEMP_L 0x10 |
| #define KMX61_TEMP_H 0x11 |
| |
| /* |
| * three 16-bit magnetometer output registers for X/Y/Z axis |
| */ |
| #define KMX61_MAG_XOUT_L 0x12 |
| #define KMX61_MAG_XOUT_H 0x13 |
| #define KMX61_MAG_YOUT_L 0x14 |
| #define KMX61_MAG_YOUT_H 0x15 |
| #define KMX61_MAG_ZOUT_L 0x16 |
| #define KMX61_MAG_ZOUT_H 0x17 |
| |
| #define KMX61_REG_INL 0x28 |
| #define KMX61_REG_STBY 0x29 |
| #define KMX61_REG_CTRL1 0x2A |
| #define KMX61_REG_CTRL2 0x2B |
| #define KMX61_REG_ODCNTL 0x2C |
| #define KMX61_REG_INC1 0x2D |
| |
| #define KMX61_REG_WUF_THRESH 0x3D |
| #define KMX61_REG_WUF_TIMER 0x3E |
| |
| #define KMX61_ACC_STBY_BIT BIT(0) |
| #define KMX61_MAG_STBY_BIT BIT(1) |
| #define KMX61_ACT_STBY_BIT BIT(7) |
| |
| #define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT) |
| |
| #define KMX61_REG_INS1_BIT_WUFS BIT(1) |
| |
| #define KMX61_REG_INS2_BIT_ZP BIT(0) |
| #define KMX61_REG_INS2_BIT_ZN BIT(1) |
| #define KMX61_REG_INS2_BIT_YP BIT(2) |
| #define KMX61_REG_INS2_BIT_YN BIT(3) |
| #define KMX61_REG_INS2_BIT_XP BIT(4) |
| #define KMX61_REG_INS2_BIT_XN BIT(5) |
| |
| #define KMX61_REG_CTRL1_GSEL_MASK 0x03 |
| |
| #define KMX61_REG_CTRL1_BIT_RES BIT(4) |
| #define KMX61_REG_CTRL1_BIT_DRDYE BIT(5) |
| #define KMX61_REG_CTRL1_BIT_WUFE BIT(6) |
| #define KMX61_REG_CTRL1_BIT_BTSE BIT(7) |
| |
| #define KMX61_REG_INC1_BIT_WUFS BIT(0) |
| #define KMX61_REG_INC1_BIT_DRDYM BIT(1) |
| #define KMX61_REG_INC1_BIT_DRDYA BIT(2) |
| #define KMX61_REG_INC1_BIT_IEN BIT(5) |
| |
| #define KMX61_ACC_ODR_SHIFT 0 |
| #define KMX61_MAG_ODR_SHIFT 4 |
| #define KMX61_ACC_ODR_MASK 0x0F |
| #define KMX61_MAG_ODR_MASK 0xF0 |
| |
| #define KMX61_OWUF_MASK 0x7 |
| |
| #define KMX61_DEFAULT_WAKE_THRESH 1 |
| #define KMX61_DEFAULT_WAKE_DURATION 1 |
| |
| #define KMX61_SLEEP_DELAY_MS 2000 |
| |
| #define KMX61_CHIP_ID 0x12 |
| |
| /* KMX61 devices */ |
| #define KMX61_ACC 0x01 |
| #define KMX61_MAG 0x02 |
| |
| struct kmx61_data { |
| struct i2c_client *client; |
| |
| /* serialize access to non-atomic ops, e.g set_mode */ |
| struct mutex lock; |
| |
| /* standby state */ |
| bool acc_stby; |
| bool mag_stby; |
| |
| /* power state */ |
| bool acc_ps; |
| bool mag_ps; |
| |
| /* config bits */ |
| u8 range; |
| u8 odr_bits; |
| u8 wake_thresh; |
| u8 wake_duration; |
| |
| /* accelerometer specific data */ |
| struct iio_dev *acc_indio_dev; |
| struct iio_trigger *acc_dready_trig; |
| struct iio_trigger *motion_trig; |
| bool acc_dready_trig_on; |
| bool motion_trig_on; |
| bool ev_enable_state; |
| |
| /* magnetometer specific data */ |
| struct iio_dev *mag_indio_dev; |
| struct iio_trigger *mag_dready_trig; |
| bool mag_dready_trig_on; |
| }; |
| |
| enum kmx61_range { |
| KMX61_RANGE_2G, |
| KMX61_RANGE_4G, |
| KMX61_RANGE_8G, |
| }; |
| |
| enum kmx61_axis { |
| KMX61_AXIS_X, |
| KMX61_AXIS_Y, |
| KMX61_AXIS_Z, |
| }; |
| |
| static const u16 kmx61_uscale_table[] = {9582, 19163, 38326}; |
| |
| static const struct { |
| int val; |
| int val2; |
| } kmx61_samp_freq_table[] = { {12, 500000}, |
| {25, 0}, |
| {50, 0}, |
| {100, 0}, |
| {200, 0}, |
| {400, 0}, |
| {800, 0}, |
| {1600, 0}, |
| {0, 781000}, |
| {1, 563000}, |
| {3, 125000}, |
| {6, 250000} }; |
| |
| static const struct { |
| int val; |
| int val2; |
| int odr_bits; |
| } kmx61_wake_up_odr_table[] = { {0, 781000, 0x00}, |
| {1, 563000, 0x01}, |
| {3, 125000, 0x02}, |
| {6, 250000, 0x03}, |
| {12, 500000, 0x04}, |
| {25, 0, 0x05}, |
| {50, 0, 0x06}, |
| {100, 0, 0x06}, |
| {200, 0, 0x06}, |
| {400, 0, 0x06}, |
| {800, 0, 0x06}, |
| {1600, 0, 0x06} }; |
| |
| static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326"); |
| static IIO_CONST_ATTR(magn_scale_available, "0.001465"); |
| static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( |
| "0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800"); |
| |
| static struct attribute *kmx61_acc_attributes[] = { |
| &iio_const_attr_accel_scale_available.dev_attr.attr, |
| &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute *kmx61_mag_attributes[] = { |
| &iio_const_attr_magn_scale_available.dev_attr.attr, |
| &iio_const_attr_sampling_frequency_available.dev_attr.attr, |
| NULL, |
| }; |
| |
| static const struct attribute_group kmx61_acc_attribute_group = { |
| .attrs = kmx61_acc_attributes, |
| }; |
| |
| static const struct attribute_group kmx61_mag_attribute_group = { |
| .attrs = kmx61_mag_attributes, |
| }; |
| |
| static const struct iio_event_spec kmx61_event = { |
| .type = IIO_EV_TYPE_THRESH, |
| .dir = IIO_EV_DIR_EITHER, |
| .mask_separate = BIT(IIO_EV_INFO_VALUE) | |
| BIT(IIO_EV_INFO_ENABLE) | |
| BIT(IIO_EV_INFO_PERIOD), |
| }; |
| |
| #define KMX61_ACC_CHAN(_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), \ |
| .address = KMX61_ACC, \ |
| .scan_index = KMX61_AXIS_ ## _axis, \ |
| .scan_type = { \ |
| .sign = 's', \ |
| .realbits = 12, \ |
| .storagebits = 16, \ |
| .shift = 4, \ |
| .endianness = IIO_LE, \ |
| }, \ |
| .event_spec = &kmx61_event, \ |
| .num_event_specs = 1 \ |
| } |
| |
| #define KMX61_MAG_CHAN(_axis) { \ |
| .type = IIO_MAGN, \ |
| .modified = 1, \ |
| .channel2 = IIO_MOD_ ## _axis, \ |
| .address = KMX61_MAG, \ |
| .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 = KMX61_AXIS_ ## _axis, \ |
| .scan_type = { \ |
| .sign = 's', \ |
| .realbits = 14, \ |
| .storagebits = 16, \ |
| .shift = 2, \ |
| .endianness = IIO_LE, \ |
| }, \ |
| } |
| |
| static const struct iio_chan_spec kmx61_acc_channels[] = { |
| KMX61_ACC_CHAN(X), |
| KMX61_ACC_CHAN(Y), |
| KMX61_ACC_CHAN(Z), |
| }; |
| |
| static const struct iio_chan_spec kmx61_mag_channels[] = { |
| KMX61_MAG_CHAN(X), |
| KMX61_MAG_CHAN(Y), |
| KMX61_MAG_CHAN(Z), |
| }; |
| |
| static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data) |
| { |
| struct kmx61_data **priv = iio_priv(indio_dev); |
| |
| *priv = data; |
| } |
| |
| static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev) |
| { |
| return *(struct kmx61_data **)iio_priv(indio_dev); |
| } |
| |
| static int kmx61_convert_freq_to_bit(int val, int val2) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) |
| if (val == kmx61_samp_freq_table[i].val && |
| val2 == kmx61_samp_freq_table[i].val2) |
| return i; |
| return -EINVAL; |
| } |
| |
| static int kmx61_convert_wake_up_odr_to_bit(int val, int val2) |
| { |
| int i; |
| |
| for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i) |
| if (kmx61_wake_up_odr_table[i].val == val && |
| kmx61_wake_up_odr_table[i].val2 == val2) |
| return kmx61_wake_up_odr_table[i].odr_bits; |
| return -EINVAL; |
| } |
| |
| /** |
| * kmx61_set_mode() - set KMX61 device operating mode |
| * @data - kmx61 device private data pointer |
| * @mode - bitmask, indicating operating mode for @device |
| * @device - bitmask, indicating device for which @mode needs to be set |
| * @update - update stby bits stored in device's private @data |
| * |
| * For each sensor (accelerometer/magnetometer) there are two operating modes |
| * STANDBY and OPERATION. Neither accel nor magn can be disabled independently |
| * if they are both enabled. Internal sensors state is saved in acc_stby and |
| * mag_stby members of driver's private @data. |
| */ |
| static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device, |
| bool update) |
| { |
| int ret; |
| int acc_stby = -1, mag_stby = -1; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_stby\n"); |
| return ret; |
| } |
| if (device & KMX61_ACC) { |
| if (mode & KMX61_ACC_STBY_BIT) { |
| ret |= KMX61_ACC_STBY_BIT; |
| acc_stby = 1; |
| } else { |
| ret &= ~KMX61_ACC_STBY_BIT; |
| acc_stby = 0; |
| } |
| } |
| |
| if (device & KMX61_MAG) { |
| if (mode & KMX61_MAG_STBY_BIT) { |
| ret |= KMX61_MAG_STBY_BIT; |
| mag_stby = 1; |
| } else { |
| ret &= ~KMX61_MAG_STBY_BIT; |
| mag_stby = 0; |
| } |
| } |
| |
| if (mode & KMX61_ACT_STBY_BIT) |
| ret |= KMX61_ACT_STBY_BIT; |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error writing reg_stby\n"); |
| return ret; |
| } |
| |
| if (acc_stby != -1 && update) |
| data->acc_stby = acc_stby; |
| if (mag_stby != -1 && update) |
| data->mag_stby = mag_stby; |
| |
| return 0; |
| } |
| |
| static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device) |
| { |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_stby\n"); |
| return ret; |
| } |
| *mode = 0; |
| |
| if (device & KMX61_ACC) { |
| if (ret & KMX61_ACC_STBY_BIT) |
| *mode |= KMX61_ACC_STBY_BIT; |
| else |
| *mode &= ~KMX61_ACC_STBY_BIT; |
| } |
| |
| if (device & KMX61_MAG) { |
| if (ret & KMX61_MAG_STBY_BIT) |
| *mode |= KMX61_MAG_STBY_BIT; |
| else |
| *mode &= ~KMX61_MAG_STBY_BIT; |
| } |
| |
| return 0; |
| } |
| |
| static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2) |
| { |
| int ret, odr_bits; |
| |
| odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2); |
| if (odr_bits < 0) |
| return odr_bits; |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2, |
| odr_bits); |
| if (ret < 0) |
| dev_err(&data->client->dev, "Error writing reg_ctrl2\n"); |
| return ret; |
| } |
| |
| static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device) |
| { |
| int ret; |
| u8 mode; |
| int lodr_bits, odr_bits; |
| |
| ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); |
| if (ret < 0) |
| return ret; |
| |
| lodr_bits = kmx61_convert_freq_to_bit(val, val2); |
| if (lodr_bits < 0) |
| return lodr_bits; |
| |
| /* To change ODR, accel and magn must be in STDBY */ |
| ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, |
| true); |
| if (ret < 0) |
| return ret; |
| |
| odr_bits = 0; |
| if (device & KMX61_ACC) |
| odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT; |
| if (device & KMX61_MAG) |
| odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT; |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL, |
| odr_bits); |
| if (ret < 0) |
| return ret; |
| |
| data->odr_bits = odr_bits; |
| |
| if (device & KMX61_ACC) { |
| ret = kmx61_set_wake_up_odr(data, val, val2); |
| if (ret) |
| return ret; |
| } |
| |
| return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
| } |
| |
| static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2, |
| u8 device) |
| { |
| u8 lodr_bits; |
| |
| if (device & KMX61_ACC) |
| lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) & |
| KMX61_ACC_ODR_MASK; |
| else if (device & KMX61_MAG) |
| lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) & |
| KMX61_MAG_ODR_MASK; |
| else |
| return -EINVAL; |
| |
| if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table)) |
| return -EINVAL; |
| |
| *val = kmx61_samp_freq_table[lodr_bits].val; |
| *val2 = kmx61_samp_freq_table[lodr_bits].val2; |
| |
| return 0; |
| } |
| |
| static int kmx61_set_range(struct kmx61_data *data, u8 range) |
| { |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); |
| return ret; |
| } |
| |
| ret &= ~KMX61_REG_CTRL1_GSEL_MASK; |
| ret |= range & KMX61_REG_CTRL1_GSEL_MASK; |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); |
| return ret; |
| } |
| |
| data->range = range; |
| |
| return 0; |
| } |
| |
| static int kmx61_set_scale(struct kmx61_data *data, u16 uscale) |
| { |
| int ret, i; |
| u8 mode; |
| |
| for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) { |
| if (kmx61_uscale_table[i] == uscale) { |
| ret = kmx61_get_mode(data, &mode, |
| KMX61_ACC | KMX61_MAG); |
| if (ret < 0) |
| return ret; |
| |
| ret = kmx61_set_mode(data, KMX61_ALL_STBY, |
| KMX61_ACC | KMX61_MAG, true); |
| if (ret < 0) |
| return ret; |
| |
| ret = kmx61_set_range(data, i); |
| if (ret < 0) |
| return ret; |
| |
| return kmx61_set_mode(data, mode, |
| KMX61_ACC | KMX61_MAG, true); |
| } |
| } |
| return -EINVAL; |
| } |
| |
| static int kmx61_chip_init(struct kmx61_data *data) |
| { |
| int ret, val, val2; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_WHO_AM_I); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading who_am_i\n"); |
| return ret; |
| } |
| |
| if (ret != KMX61_CHIP_ID) { |
| dev_err(&data->client->dev, |
| "Wrong chip id, got %x expected %x\n", |
| ret, KMX61_CHIP_ID); |
| return -EINVAL; |
| } |
| |
| /* set accel 12bit, 4g range */ |
| ret = kmx61_set_range(data, KMX61_RANGE_4G); |
| if (ret < 0) |
| return ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_ODCNTL); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_odcntl\n"); |
| return ret; |
| } |
| data->odr_bits = ret; |
| |
| /* |
| * set output data rate for wake up (motion detection) function |
| * to match data rate for accelerometer sampling |
| */ |
| ret = kmx61_get_odr(data, &val, &val2, KMX61_ACC); |
| if (ret < 0) |
| return ret; |
| |
| ret = kmx61_set_wake_up_odr(data, val, val2); |
| if (ret < 0) |
| return ret; |
| |
| /* set acc/magn to OPERATION mode */ |
| ret = kmx61_set_mode(data, 0, KMX61_ACC | KMX61_MAG, true); |
| if (ret < 0) |
| return ret; |
| |
| data->wake_thresh = KMX61_DEFAULT_WAKE_THRESH; |
| data->wake_duration = KMX61_DEFAULT_WAKE_DURATION; |
| |
| return 0; |
| } |
| |
| static int kmx61_setup_new_data_interrupt(struct kmx61_data *data, |
| bool status, u8 device) |
| { |
| u8 mode; |
| int ret; |
| |
| ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); |
| if (ret < 0) |
| return ret; |
| |
| ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); |
| if (ret < 0) |
| return ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); |
| return ret; |
| } |
| |
| if (status) { |
| ret |= KMX61_REG_INC1_BIT_IEN; |
| if (device & KMX61_ACC) |
| ret |= KMX61_REG_INC1_BIT_DRDYA; |
| if (device & KMX61_MAG) |
| ret |= KMX61_REG_INC1_BIT_DRDYM; |
| } else { |
| ret &= ~KMX61_REG_INC1_BIT_IEN; |
| if (device & KMX61_ACC) |
| ret &= ~KMX61_REG_INC1_BIT_DRDYA; |
| if (device & KMX61_MAG) |
| ret &= ~KMX61_REG_INC1_BIT_DRDYM; |
| } |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, 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, KMX61_REG_CTRL1); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); |
| return ret; |
| } |
| |
| if (status) |
| ret |= KMX61_REG_CTRL1_BIT_DRDYE; |
| else |
| ret &= ~KMX61_REG_CTRL1_BIT_DRDYE; |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); |
| return ret; |
| } |
| |
| return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
| } |
| |
| static int kmx61_chip_update_thresholds(struct kmx61_data *data) |
| { |
| int ret; |
| |
| ret = i2c_smbus_write_byte_data(data->client, |
| KMX61_REG_WUF_TIMER, |
| data->wake_duration); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Errow writing reg_wuf_timer\n"); |
| return ret; |
| } |
| |
| ret = i2c_smbus_write_byte_data(data->client, |
| KMX61_REG_WUF_THRESH, |
| data->wake_thresh); |
| if (ret < 0) |
| dev_err(&data->client->dev, "Error writing reg_wuf_thresh\n"); |
| |
| return ret; |
| } |
| |
| static int kmx61_setup_any_motion_interrupt(struct kmx61_data *data, |
| bool status) |
| { |
| u8 mode; |
| int ret; |
| |
| ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); |
| if (ret < 0) |
| return ret; |
| |
| ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); |
| if (ret < 0) |
| return ret; |
| |
| ret = kmx61_chip_update_thresholds(data); |
| if (ret < 0) |
| return ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INC1); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_inc1\n"); |
| return ret; |
| } |
| if (status) |
| ret |= (KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); |
| else |
| ret &= ~(KMX61_REG_INC1_BIT_IEN | KMX61_REG_INC1_BIT_WUFS); |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_INC1, ret); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error writing reg_inc1\n"); |
| return ret; |
| } |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); |
| return ret; |
| } |
| |
| if (status) |
| ret |= KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE; |
| else |
| ret &= ~(KMX61_REG_CTRL1_BIT_WUFE | KMX61_REG_CTRL1_BIT_BTSE); |
| |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); |
| return ret; |
| } |
| mode |= KMX61_ACT_STBY_BIT; |
| return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
| } |
| |
| /** |
| * kmx61_set_power_state() - set power state for kmx61 @device |
| * @data - kmx61 device private pointer |
| * @on - power state to be set for @device |
| * @device - bitmask indicating device for which @on state needs to be set |
| * |
| * Notice that when ACC power state needs to be set to ON and MAG is in |
| * OPERATION then we know that kmx61_runtime_resume was already called |
| * so we must set ACC OPERATION mode here. The same happens when MAG power |
| * state needs to be set to ON and ACC is in OPERATION. |
| */ |
| static int kmx61_set_power_state(struct kmx61_data *data, bool on, u8 device) |
| { |
| #ifdef CONFIG_PM |
| int ret; |
| |
| if (device & KMX61_ACC) { |
| if (on && !data->acc_ps && !data->mag_stby) { |
| ret = kmx61_set_mode(data, 0, KMX61_ACC, true); |
| if (ret < 0) |
| return ret; |
| } |
| data->acc_ps = on; |
| } |
| if (device & KMX61_MAG) { |
| if (on && !data->mag_ps && !data->acc_stby) { |
| ret = kmx61_set_mode(data, 0, KMX61_MAG, true); |
| if (ret < 0) |
| return ret; |
| } |
| data->mag_ps = on; |
| } |
| |
| if (on) { |
| ret = pm_runtime_get_sync(&data->client->dev); |
| } else { |
| pm_runtime_mark_last_busy(&data->client->dev); |
| ret = pm_runtime_put_autosuspend(&data->client->dev); |
| } |
| if (ret < 0) { |
| dev_err(&data->client->dev, |
| "Failed: kmx61_set_power_state for %d, ret %d\n", |
| on, ret); |
| if (on) |
| pm_runtime_put_noidle(&data->client->dev); |
| |
| return ret; |
| } |
| #endif |
| return 0; |
| } |
| |
| static int kmx61_read_measurement(struct kmx61_data *data, u8 base, u8 offset) |
| { |
| int ret; |
| u8 reg = base + offset * 2; |
| |
| ret = i2c_smbus_read_word_data(data->client, reg); |
| if (ret < 0) |
| dev_err(&data->client->dev, "failed to read reg at %x\n", reg); |
| |
| return ret; |
| } |
| |
| static int kmx61_read_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, int *val, |
| int *val2, long mask) |
| { |
| int ret; |
| u8 base_reg; |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_RAW: |
| switch (chan->type) { |
| case IIO_ACCEL: |
| base_reg = KMX61_ACC_XOUT_L; |
| break; |
| case IIO_MAGN: |
| base_reg = KMX61_MAG_XOUT_L; |
| break; |
| default: |
| return -EINVAL; |
| } |
| mutex_lock(&data->lock); |
| |
| ret = kmx61_set_power_state(data, true, chan->address); |
| if (ret) { |
| mutex_unlock(&data->lock); |
| return ret; |
| } |
| |
| ret = kmx61_read_measurement(data, base_reg, chan->scan_index); |
| if (ret < 0) { |
| kmx61_set_power_state(data, false, chan->address); |
| mutex_unlock(&data->lock); |
| return ret; |
| } |
| *val = sign_extend32(ret >> chan->scan_type.shift, |
| chan->scan_type.realbits - 1); |
| ret = kmx61_set_power_state(data, false, chan->address); |
| |
| mutex_unlock(&data->lock); |
| if (ret) |
| return ret; |
| return IIO_VAL_INT; |
| case IIO_CHAN_INFO_SCALE: |
| switch (chan->type) { |
| case IIO_ACCEL: |
| *val = 0; |
| *val2 = kmx61_uscale_table[data->range]; |
| return IIO_VAL_INT_PLUS_MICRO; |
| case IIO_MAGN: |
| /* 14 bits res, 1465 microGauss per magn count */ |
| *val = 0; |
| *val2 = 1465; |
| return IIO_VAL_INT_PLUS_MICRO; |
| default: |
| return -EINVAL; |
| } |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) |
| return -EINVAL; |
| |
| mutex_lock(&data->lock); |
| ret = kmx61_get_odr(data, val, val2, chan->address); |
| mutex_unlock(&data->lock); |
| if (ret) |
| return -EINVAL; |
| return IIO_VAL_INT_PLUS_MICRO; |
| } |
| return -EINVAL; |
| } |
| |
| static int kmx61_write_raw(struct iio_dev *indio_dev, |
| struct iio_chan_spec const *chan, int val, |
| int val2, long mask) |
| { |
| int ret; |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| switch (mask) { |
| case IIO_CHAN_INFO_SAMP_FREQ: |
| if (chan->type != IIO_ACCEL && chan->type != IIO_MAGN) |
| return -EINVAL; |
| |
| mutex_lock(&data->lock); |
| ret = kmx61_set_odr(data, val, val2, chan->address); |
| mutex_unlock(&data->lock); |
| return ret; |
| case IIO_CHAN_INFO_SCALE: |
| switch (chan->type) { |
| case IIO_ACCEL: |
| if (val != 0) |
| return -EINVAL; |
| mutex_lock(&data->lock); |
| ret = kmx61_set_scale(data, val2); |
| mutex_unlock(&data->lock); |
| return ret; |
| default: |
| return -EINVAL; |
| } |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int kmx61_read_event(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir, |
| enum iio_event_info info, |
| int *val, int *val2) |
| { |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| *val2 = 0; |
| switch (info) { |
| case IIO_EV_INFO_VALUE: |
| *val = data->wake_thresh; |
| return IIO_VAL_INT; |
| case IIO_EV_INFO_PERIOD: |
| *val = data->wake_duration; |
| return IIO_VAL_INT; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int kmx61_write_event(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir, |
| enum iio_event_info info, |
| int val, int val2) |
| { |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| if (data->ev_enable_state) |
| return -EBUSY; |
| |
| switch (info) { |
| case IIO_EV_INFO_VALUE: |
| data->wake_thresh = val; |
| return IIO_VAL_INT; |
| case IIO_EV_INFO_PERIOD: |
| data->wake_duration = val; |
| return IIO_VAL_INT; |
| default: |
| return -EINVAL; |
| } |
| } |
| |
| static int kmx61_read_event_config(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir) |
| { |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| return data->ev_enable_state; |
| } |
| |
| static int kmx61_write_event_config(struct iio_dev *indio_dev, |
| const struct iio_chan_spec *chan, |
| enum iio_event_type type, |
| enum iio_event_direction dir, |
| int state) |
| { |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| int ret = 0; |
| |
| if (state && data->ev_enable_state) |
| return 0; |
| |
| mutex_lock(&data->lock); |
| |
| if (!state && data->motion_trig_on) { |
| data->ev_enable_state = false; |
| goto err_unlock; |
| } |
| |
| ret = kmx61_set_power_state(data, state, KMX61_ACC); |
| if (ret < 0) |
| goto err_unlock; |
| |
| ret = kmx61_setup_any_motion_interrupt(data, state); |
| if (ret < 0) { |
| kmx61_set_power_state(data, false, KMX61_ACC); |
| goto err_unlock; |
| } |
| |
| data->ev_enable_state = state; |
| |
| err_unlock: |
| mutex_unlock(&data->lock); |
| |
| return ret; |
| } |
| |
| static int kmx61_acc_validate_trigger(struct iio_dev *indio_dev, |
| struct iio_trigger *trig) |
| { |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| if (data->acc_dready_trig != trig && data->motion_trig != trig) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static int kmx61_mag_validate_trigger(struct iio_dev *indio_dev, |
| struct iio_trigger *trig) |
| { |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| if (data->mag_dready_trig != trig) |
| return -EINVAL; |
| |
| return 0; |
| } |
| |
| static const struct iio_info kmx61_acc_info = { |
| .driver_module = THIS_MODULE, |
| .read_raw = kmx61_read_raw, |
| .write_raw = kmx61_write_raw, |
| .attrs = &kmx61_acc_attribute_group, |
| .read_event_value = kmx61_read_event, |
| .write_event_value = kmx61_write_event, |
| .read_event_config = kmx61_read_event_config, |
| .write_event_config = kmx61_write_event_config, |
| .validate_trigger = kmx61_acc_validate_trigger, |
| }; |
| |
| static const struct iio_info kmx61_mag_info = { |
| .driver_module = THIS_MODULE, |
| .read_raw = kmx61_read_raw, |
| .write_raw = kmx61_write_raw, |
| .attrs = &kmx61_mag_attribute_group, |
| .validate_trigger = kmx61_mag_validate_trigger, |
| }; |
| |
| |
| static int kmx61_data_rdy_trigger_set_state(struct iio_trigger *trig, |
| bool state) |
| { |
| int ret = 0; |
| u8 device; |
| |
| struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| |
| mutex_lock(&data->lock); |
| |
| if (!state && data->ev_enable_state && data->motion_trig_on) { |
| data->motion_trig_on = false; |
| goto err_unlock; |
| } |
| |
| if (data->acc_dready_trig == trig || data->motion_trig == trig) |
| device = KMX61_ACC; |
| else |
| device = KMX61_MAG; |
| |
| ret = kmx61_set_power_state(data, state, device); |
| if (ret < 0) |
| goto err_unlock; |
| |
| if (data->acc_dready_trig == trig || data->mag_dready_trig == trig) |
| ret = kmx61_setup_new_data_interrupt(data, state, device); |
| else |
| ret = kmx61_setup_any_motion_interrupt(data, state); |
| if (ret < 0) { |
| kmx61_set_power_state(data, false, device); |
| goto err_unlock; |
| } |
| |
| if (data->acc_dready_trig == trig) |
| data->acc_dready_trig_on = state; |
| else if (data->mag_dready_trig == trig) |
| data->mag_dready_trig_on = state; |
| else |
| data->motion_trig_on = state; |
| err_unlock: |
| mutex_unlock(&data->lock); |
| |
| return ret; |
| } |
| |
| static int kmx61_trig_try_reenable(struct iio_trigger *trig) |
| { |
| struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_inl\n"); |
| return ret; |
| } |
| |
| return 0; |
| } |
| |
| static const struct iio_trigger_ops kmx61_trigger_ops = { |
| .set_trigger_state = kmx61_data_rdy_trigger_set_state, |
| .try_reenable = kmx61_trig_try_reenable, |
| .owner = THIS_MODULE, |
| }; |
| |
| static irqreturn_t kmx61_event_handler(int irq, void *private) |
| { |
| struct kmx61_data *data = private; |
| struct iio_dev *indio_dev = data->acc_indio_dev; |
| int ret; |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS1); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_ins1\n"); |
| goto ack_intr; |
| } |
| |
| if (ret & KMX61_REG_INS1_BIT_WUFS) { |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INS2); |
| if (ret < 0) { |
| dev_err(&data->client->dev, "Error reading reg_ins2\n"); |
| goto ack_intr; |
| } |
| |
| if (ret & KMX61_REG_INS2_BIT_XN) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 0, |
| IIO_MOD_X, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_FALLING), |
| 0); |
| |
| if (ret & KMX61_REG_INS2_BIT_XP) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 0, |
| IIO_MOD_X, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_RISING), |
| 0); |
| |
| if (ret & KMX61_REG_INS2_BIT_YN) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 0, |
| IIO_MOD_Y, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_FALLING), |
| 0); |
| |
| if (ret & KMX61_REG_INS2_BIT_YP) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 0, |
| IIO_MOD_Y, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_RISING), |
| 0); |
| |
| if (ret & KMX61_REG_INS2_BIT_ZN) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 0, |
| IIO_MOD_Z, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_FALLING), |
| 0); |
| |
| if (ret & KMX61_REG_INS2_BIT_ZP) |
| iio_push_event(indio_dev, |
| IIO_MOD_EVENT_CODE(IIO_ACCEL, |
| 0, |
| IIO_MOD_Z, |
| IIO_EV_TYPE_THRESH, |
| IIO_EV_DIR_RISING), |
| 0); |
| } |
| |
| ack_intr: |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); |
| if (ret < 0) |
| dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); |
| |
| ret |= KMX61_REG_CTRL1_BIT_RES; |
| ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); |
| if (ret < 0) |
| dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); |
| |
| ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_INL); |
| if (ret < 0) |
| dev_err(&data->client->dev, "Error reading reg_inl\n"); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t kmx61_data_rdy_trig_poll(int irq, void *private) |
| { |
| struct kmx61_data *data = private; |
| |
| if (data->acc_dready_trig_on) |
| iio_trigger_poll(data->acc_dready_trig); |
| if (data->mag_dready_trig_on) |
| iio_trigger_poll(data->mag_dready_trig); |
| |
| if (data->motion_trig_on) |
| iio_trigger_poll(data->motion_trig); |
| |
| if (data->ev_enable_state) |
| return IRQ_WAKE_THREAD; |
| return IRQ_HANDLED; |
| } |
| |
| static irqreturn_t kmx61_trigger_handler(int irq, void *p) |
| { |
| struct iio_poll_func *pf = p; |
| struct iio_dev *indio_dev = pf->indio_dev; |
| struct kmx61_data *data = kmx61_get_data(indio_dev); |
| int bit, ret, i = 0; |
| u8 base; |
| s16 buffer[8]; |
| |
| if (indio_dev == data->acc_indio_dev) |
| base = KMX61_ACC_XOUT_L; |
| else |
| base = KMX61_MAG_XOUT_L; |
| |
| mutex_lock(&data->lock); |
| for_each_set_bit(bit, indio_dev->active_scan_mask, |
| indio_dev->masklength) { |
| ret = kmx61_read_measurement(data, base, bit); |
| if (ret < 0) { |
| mutex_unlock(&data->lock); |
| goto err; |
| } |
| buffer[i++] = ret; |
| } |
| mutex_unlock(&data->lock); |
| |
| iio_push_to_buffers(indio_dev, buffer); |
| err: |
| iio_trigger_notify_done(indio_dev->trig); |
| |
| return IRQ_HANDLED; |
| } |
| |
| static const char *kmx61_match_acpi_device(struct device *dev) |
| { |
| const struct acpi_device_id *id; |
| |
| id = acpi_match_device(dev->driver->acpi_match_table, dev); |
| if (!id) |
| return NULL; |
| return dev_name(dev); |
| } |
| |
| static int kmx61_gpio_probe(struct i2c_client *client, struct kmx61_data *data) |
| { |
| struct device *dev; |
| struct gpio_desc *gpio; |
| int ret; |
| |
| if (!client) |
| return -EINVAL; |
| |
| dev = &client->dev; |
| |
| /* data ready gpio interrupt pin */ |
| gpio = devm_gpiod_get_index(dev, KMX61_GPIO_NAME, 0, GPIOD_IN); |
| if (IS_ERR(gpio)) { |
| dev_err(dev, "acpi gpio get index failed\n"); |
| return PTR_ERR(gpio); |
| } |
| |
| ret = gpiod_to_irq(gpio); |
| |
| dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret); |
| return ret; |
| } |
| |
| static struct iio_dev *kmx61_indiodev_setup(struct kmx61_data *data, |
| const struct iio_info *info, |
| const struct iio_chan_spec *chan, |
| int num_channels, |
| const char *name) |
| { |
| struct iio_dev *indio_dev; |
| |
| indio_dev = devm_iio_device_alloc(&data->client->dev, sizeof(data)); |
| if (!indio_dev) |
| return ERR_PTR(-ENOMEM); |
| |
| kmx61_set_data(indio_dev, data); |
| |
| indio_dev->dev.parent = &data->client->dev; |
| indio_dev->channels = chan; |
| indio_dev->num_channels = num_channels; |
| indio_dev->name = name; |
| indio_dev->modes = INDIO_DIRECT_MODE; |
| indio_dev->info = info; |
| |
| return indio_dev; |
| } |
| |
| static struct iio_trigger *kmx61_trigger_setup(struct kmx61_data *data, |
| struct iio_dev *indio_dev, |
| const char *tag) |
| { |
| struct iio_trigger *trig; |
| int ret; |
| |
| trig = devm_iio_trigger_alloc(&data->client->dev, |
| "%s-%s-dev%d", |
| indio_dev->name, |
| tag, |
| indio_dev->id); |
| if (!trig) |
| return ERR_PTR(-ENOMEM); |
| |
| trig->dev.parent = &data->client->dev; |
| trig->ops = &kmx61_trigger_ops; |
| iio_trigger_set_drvdata(trig, indio_dev); |
| |
| ret = iio_trigger_register(trig); |
| if (ret) |
| return ERR_PTR(ret); |
| |
| return trig; |
| } |
| |
| static int kmx61_probe(struct i2c_client *client, |
| const struct i2c_device_id *id) |
| { |
| int ret; |
| struct kmx61_data *data; |
| const char *name = NULL; |
| |
| data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL); |
| if (!data) |
| return -ENOMEM; |
| |
| i2c_set_clientdata(client, data); |
| data->client = client; |
| |
| mutex_init(&data->lock); |
| |
| if (id) |
| name = id->name; |
| else if (ACPI_HANDLE(&client->dev)) |
| name = kmx61_match_acpi_device(&client->dev); |
| else |
| return -ENODEV; |
| |
| data->acc_indio_dev = |
| kmx61_indiodev_setup(data, &kmx61_acc_info, |
| kmx61_acc_channels, |
| ARRAY_SIZE(kmx61_acc_channels), |
| name); |
| if (IS_ERR(data->acc_indio_dev)) |
| return PTR_ERR(data->acc_indio_dev); |
| |
| data->mag_indio_dev = |
| kmx61_indiodev_setup(data, &kmx61_mag_info, |
| kmx61_mag_channels, |
| ARRAY_SIZE(kmx61_mag_channels), |
| name); |
| if (IS_ERR(data->mag_indio_dev)) |
| return PTR_ERR(data->mag_indio_dev); |
| |
| ret = kmx61_chip_init(data); |
| if (ret < 0) |
| return ret; |
| |
| if (client->irq < 0) |
| client->irq = kmx61_gpio_probe(client, data); |
| |
| if (client->irq > 0) { |
| ret = devm_request_threaded_irq(&client->dev, client->irq, |
| kmx61_data_rdy_trig_poll, |
| kmx61_event_handler, |
| IRQF_TRIGGER_RISING, |
| KMX61_IRQ_NAME, |
| data); |
| if (ret) |
| goto err_chip_uninit; |
| |
| data->acc_dready_trig = |
| kmx61_trigger_setup(data, data->acc_indio_dev, |
| "dready"); |
| if (IS_ERR(data->acc_dready_trig)) { |
| ret = PTR_ERR(data->acc_dready_trig); |
| goto err_chip_uninit; |
| } |
| |
| data->mag_dready_trig = |
| kmx61_trigger_setup(data, data->mag_indio_dev, |
| "dready"); |
| if (IS_ERR(data->mag_dready_trig)) { |
| ret = PTR_ERR(data->mag_dready_trig); |
| goto err_trigger_unregister_acc_dready; |
| } |
| |
| data->motion_trig = |
| kmx61_trigger_setup(data, data->acc_indio_dev, |
| "any-motion"); |
| if (IS_ERR(data->motion_trig)) { |
| ret = PTR_ERR(data->motion_trig); |
| goto err_trigger_unregister_mag_dready; |
| } |
| |
| ret = iio_triggered_buffer_setup(data->acc_indio_dev, |
| &iio_pollfunc_store_time, |
| kmx61_trigger_handler, |
| NULL); |
| if (ret < 0) { |
| dev_err(&data->client->dev, |
| "Failed to setup acc triggered buffer\n"); |
| goto err_trigger_unregister_motion; |
| } |
| |
| ret = iio_triggered_buffer_setup(data->mag_indio_dev, |
| &iio_pollfunc_store_time, |
| kmx61_trigger_handler, |
| NULL); |
| if (ret < 0) { |
| dev_err(&data->client->dev, |
| "Failed to setup mag triggered buffer\n"); |
| goto err_buffer_cleanup_acc; |
| } |
| } |
| |
| ret = iio_device_register(data->acc_indio_dev); |
| if (ret < 0) { |
| dev_err(&client->dev, "Failed to register acc iio device\n"); |
| goto err_buffer_cleanup_mag; |
| } |
| |
| ret = iio_device_register(data->mag_indio_dev); |
| if (ret < 0) { |
| dev_err(&client->dev, "Failed to register mag iio device\n"); |
| goto err_iio_unregister_acc; |
| } |
| |
| ret = pm_runtime_set_active(&client->dev); |
| if (ret < 0) |
| goto err_iio_unregister_mag; |
| |
| pm_runtime_enable(&client->dev); |
| pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS); |
| pm_runtime_use_autosuspend(&client->dev); |
| |
| return 0; |
| |
| err_iio_unregister_mag: |
| iio_device_unregister(data->mag_indio_dev); |
| err_iio_unregister_acc: |
| iio_device_unregister(data->acc_indio_dev); |
| err_buffer_cleanup_mag: |
| if (client->irq > 0) |
| iio_triggered_buffer_cleanup(data->mag_indio_dev); |
| err_buffer_cleanup_acc: |
| if (client->irq > 0) |
| iio_triggered_buffer_cleanup(data->acc_indio_dev); |
| err_trigger_unregister_motion: |
| iio_trigger_unregister(data->motion_trig); |
| err_trigger_unregister_mag_dready: |
| iio_trigger_unregister(data->mag_dready_trig); |
| err_trigger_unregister_acc_dready: |
| iio_trigger_unregister(data->acc_dready_trig); |
| err_chip_uninit: |
| kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); |
| return ret; |
| } |
| |
| static int kmx61_remove(struct i2c_client *client) |
| { |
| struct kmx61_data *data = i2c_get_clientdata(client); |
| |
| pm_runtime_disable(&client->dev); |
| pm_runtime_set_suspended(&client->dev); |
| pm_runtime_put_noidle(&client->dev); |
| |
| iio_device_unregister(data->acc_indio_dev); |
| iio_device_unregister(data->mag_indio_dev); |
| |
| if (client->irq > 0) { |
| iio_triggered_buffer_cleanup(data->acc_indio_dev); |
| iio_triggered_buffer_cleanup(data->mag_indio_dev); |
| iio_trigger_unregister(data->acc_dready_trig); |
| iio_trigger_unregister(data->mag_dready_trig); |
| iio_trigger_unregister(data->motion_trig); |
| } |
| |
| mutex_lock(&data->lock); |
| kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); |
| mutex_unlock(&data->lock); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_PM_SLEEP |
| static int kmx61_suspend(struct device *dev) |
| { |
| int ret; |
| struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); |
| |
| mutex_lock(&data->lock); |
| ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, |
| false); |
| mutex_unlock(&data->lock); |
| |
| return ret; |
| } |
| |
| static int kmx61_resume(struct device *dev) |
| { |
| u8 stby = 0; |
| struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); |
| |
| if (data->acc_stby) |
| stby |= KMX61_ACC_STBY_BIT; |
| if (data->mag_stby) |
| stby |= KMX61_MAG_STBY_BIT; |
| |
| return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); |
| } |
| #endif |
| |
| #ifdef CONFIG_PM |
| static int kmx61_runtime_suspend(struct device *dev) |
| { |
| struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); |
| int ret; |
| |
| mutex_lock(&data->lock); |
| ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, true); |
| mutex_unlock(&data->lock); |
| |
| return ret; |
| } |
| |
| static int kmx61_runtime_resume(struct device *dev) |
| { |
| struct kmx61_data *data = i2c_get_clientdata(to_i2c_client(dev)); |
| u8 stby = 0; |
| |
| if (!data->acc_ps) |
| stby |= KMX61_ACC_STBY_BIT; |
| if (!data->mag_ps) |
| stby |= KMX61_MAG_STBY_BIT; |
| |
| return kmx61_set_mode(data, stby, KMX61_ACC | KMX61_MAG, true); |
| } |
| #endif |
| |
| static const struct dev_pm_ops kmx61_pm_ops = { |
| SET_SYSTEM_SLEEP_PM_OPS(kmx61_suspend, kmx61_resume) |
| SET_RUNTIME_PM_OPS(kmx61_runtime_suspend, kmx61_runtime_resume, NULL) |
| }; |
| |
| static const struct acpi_device_id kmx61_acpi_match[] = { |
| {"KMX61021", 0}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(acpi, kmx61_acpi_match); |
| |
| static const struct i2c_device_id kmx61_id[] = { |
| {"kmx611021", 0}, |
| {} |
| }; |
| |
| MODULE_DEVICE_TABLE(i2c, kmx61_id); |
| |
| static struct i2c_driver kmx61_driver = { |
| .driver = { |
| .name = KMX61_DRV_NAME, |
| .acpi_match_table = ACPI_PTR(kmx61_acpi_match), |
| .pm = &kmx61_pm_ops, |
| }, |
| .probe = kmx61_probe, |
| .remove = kmx61_remove, |
| .id_table = kmx61_id, |
| }; |
| |
| module_i2c_driver(kmx61_driver); |
| |
| MODULE_AUTHOR("Daniel Baluta <daniel.baluta@intel.com>"); |
| MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver"); |
| MODULE_LICENSE("GPL v2"); |