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1536 lines
36 KiB
1536 lines
36 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* KMX61 - Kionix 6-axis Accelerometer/Magnetometer |
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* |
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* Copyright (c) 2014, Intel Corporation. |
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* |
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* IIO driver for KMX61 (7-bit I2C slave address 0x0E or 0x0F). |
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*/ |
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#include <linux/module.h> |
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#include <linux/i2c.h> |
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#include <linux/acpi.h> |
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#include <linux/interrupt.h> |
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#include <linux/pm.h> |
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#include <linux/pm_runtime.h> |
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#include <linux/iio/iio.h> |
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#include <linux/iio/sysfs.h> |
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#include <linux/iio/events.h> |
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#include <linux/iio/trigger.h> |
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#include <linux/iio/buffer.h> |
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#include <linux/iio/triggered_buffer.h> |
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#include <linux/iio/trigger_consumer.h> |
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#define KMX61_DRV_NAME "kmx61" |
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#define KMX61_IRQ_NAME "kmx61_event" |
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#define KMX61_REG_WHO_AM_I 0x00 |
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#define KMX61_REG_INS1 0x01 |
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#define KMX61_REG_INS2 0x02 |
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/* |
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* three 16-bit accelerometer output registers for X/Y/Z axis |
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* we use only XOUT_L as a base register, all other addresses |
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* can be obtained by applying an offset and are provided here |
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* only for clarity. |
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*/ |
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#define KMX61_ACC_XOUT_L 0x0A |
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#define KMX61_ACC_XOUT_H 0x0B |
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#define KMX61_ACC_YOUT_L 0x0C |
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#define KMX61_ACC_YOUT_H 0x0D |
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#define KMX61_ACC_ZOUT_L 0x0E |
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#define KMX61_ACC_ZOUT_H 0x0F |
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|
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/* |
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* one 16-bit temperature output register |
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*/ |
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#define KMX61_TEMP_L 0x10 |
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#define KMX61_TEMP_H 0x11 |
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/* |
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* three 16-bit magnetometer output registers for X/Y/Z axis |
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*/ |
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#define KMX61_MAG_XOUT_L 0x12 |
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#define KMX61_MAG_XOUT_H 0x13 |
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#define KMX61_MAG_YOUT_L 0x14 |
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#define KMX61_MAG_YOUT_H 0x15 |
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#define KMX61_MAG_ZOUT_L 0x16 |
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#define KMX61_MAG_ZOUT_H 0x17 |
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#define KMX61_REG_INL 0x28 |
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#define KMX61_REG_STBY 0x29 |
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#define KMX61_REG_CTRL1 0x2A |
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#define KMX61_REG_CTRL2 0x2B |
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#define KMX61_REG_ODCNTL 0x2C |
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#define KMX61_REG_INC1 0x2D |
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#define KMX61_REG_WUF_THRESH 0x3D |
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#define KMX61_REG_WUF_TIMER 0x3E |
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#define KMX61_ACC_STBY_BIT BIT(0) |
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#define KMX61_MAG_STBY_BIT BIT(1) |
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#define KMX61_ACT_STBY_BIT BIT(7) |
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#define KMX61_ALL_STBY (KMX61_ACC_STBY_BIT | KMX61_MAG_STBY_BIT) |
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#define KMX61_REG_INS1_BIT_WUFS BIT(1) |
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#define KMX61_REG_INS2_BIT_ZP BIT(0) |
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#define KMX61_REG_INS2_BIT_ZN BIT(1) |
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#define KMX61_REG_INS2_BIT_YP BIT(2) |
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#define KMX61_REG_INS2_BIT_YN BIT(3) |
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#define KMX61_REG_INS2_BIT_XP BIT(4) |
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#define KMX61_REG_INS2_BIT_XN BIT(5) |
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#define KMX61_REG_CTRL1_GSEL_MASK 0x03 |
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#define KMX61_REG_CTRL1_BIT_RES BIT(4) |
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#define KMX61_REG_CTRL1_BIT_DRDYE BIT(5) |
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#define KMX61_REG_CTRL1_BIT_WUFE BIT(6) |
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#define KMX61_REG_CTRL1_BIT_BTSE BIT(7) |
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#define KMX61_REG_INC1_BIT_WUFS BIT(0) |
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#define KMX61_REG_INC1_BIT_DRDYM BIT(1) |
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#define KMX61_REG_INC1_BIT_DRDYA BIT(2) |
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#define KMX61_REG_INC1_BIT_IEN BIT(5) |
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#define KMX61_ACC_ODR_SHIFT 0 |
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#define KMX61_MAG_ODR_SHIFT 4 |
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#define KMX61_ACC_ODR_MASK 0x0F |
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#define KMX61_MAG_ODR_MASK 0xF0 |
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#define KMX61_OWUF_MASK 0x7 |
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#define KMX61_DEFAULT_WAKE_THRESH 1 |
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#define KMX61_DEFAULT_WAKE_DURATION 1 |
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#define KMX61_SLEEP_DELAY_MS 2000 |
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#define KMX61_CHIP_ID 0x12 |
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/* KMX61 devices */ |
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#define KMX61_ACC 0x01 |
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#define KMX61_MAG 0x02 |
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struct kmx61_data { |
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struct i2c_client *client; |
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/* serialize access to non-atomic ops, e.g set_mode */ |
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struct mutex lock; |
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/* standby state */ |
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bool acc_stby; |
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bool mag_stby; |
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/* power state */ |
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bool acc_ps; |
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bool mag_ps; |
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/* config bits */ |
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u8 range; |
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u8 odr_bits; |
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u8 wake_thresh; |
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u8 wake_duration; |
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/* accelerometer specific data */ |
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struct iio_dev *acc_indio_dev; |
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struct iio_trigger *acc_dready_trig; |
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struct iio_trigger *motion_trig; |
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bool acc_dready_trig_on; |
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bool motion_trig_on; |
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bool ev_enable_state; |
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/* magnetometer specific data */ |
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struct iio_dev *mag_indio_dev; |
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struct iio_trigger *mag_dready_trig; |
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bool mag_dready_trig_on; |
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}; |
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enum kmx61_range { |
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KMX61_RANGE_2G, |
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KMX61_RANGE_4G, |
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KMX61_RANGE_8G, |
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}; |
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enum kmx61_axis { |
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KMX61_AXIS_X, |
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KMX61_AXIS_Y, |
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KMX61_AXIS_Z, |
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}; |
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static const u16 kmx61_uscale_table[] = {9582, 19163, 38326}; |
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static const struct { |
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int val; |
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int val2; |
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} kmx61_samp_freq_table[] = { {12, 500000}, |
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{25, 0}, |
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{50, 0}, |
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{100, 0}, |
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{200, 0}, |
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{400, 0}, |
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{800, 0}, |
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{1600, 0}, |
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{0, 781000}, |
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{1, 563000}, |
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{3, 125000}, |
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{6, 250000} }; |
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static const struct { |
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int val; |
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int val2; |
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int odr_bits; |
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} kmx61_wake_up_odr_table[] = { {0, 781000, 0x00}, |
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{1, 563000, 0x01}, |
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{3, 125000, 0x02}, |
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{6, 250000, 0x03}, |
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{12, 500000, 0x04}, |
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{25, 0, 0x05}, |
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{50, 0, 0x06}, |
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{100, 0, 0x06}, |
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{200, 0, 0x06}, |
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{400, 0, 0x06}, |
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{800, 0, 0x06}, |
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{1600, 0, 0x06} }; |
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static IIO_CONST_ATTR(accel_scale_available, "0.009582 0.019163 0.038326"); |
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static IIO_CONST_ATTR(magn_scale_available, "0.001465"); |
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static IIO_CONST_ATTR_SAMP_FREQ_AVAIL( |
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"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800"); |
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static struct attribute *kmx61_acc_attributes[] = { |
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&iio_const_attr_accel_scale_available.dev_attr.attr, |
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&iio_const_attr_sampling_frequency_available.dev_attr.attr, |
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NULL, |
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}; |
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static struct attribute *kmx61_mag_attributes[] = { |
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&iio_const_attr_magn_scale_available.dev_attr.attr, |
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&iio_const_attr_sampling_frequency_available.dev_attr.attr, |
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NULL, |
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}; |
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static const struct attribute_group kmx61_acc_attribute_group = { |
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.attrs = kmx61_acc_attributes, |
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}; |
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static const struct attribute_group kmx61_mag_attribute_group = { |
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.attrs = kmx61_mag_attributes, |
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}; |
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static const struct iio_event_spec kmx61_event = { |
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.type = IIO_EV_TYPE_THRESH, |
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.dir = IIO_EV_DIR_EITHER, |
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.mask_separate = BIT(IIO_EV_INFO_VALUE) | |
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BIT(IIO_EV_INFO_ENABLE) | |
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BIT(IIO_EV_INFO_PERIOD), |
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}; |
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#define KMX61_ACC_CHAN(_axis) { \ |
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.type = IIO_ACCEL, \ |
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.modified = 1, \ |
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.channel2 = IIO_MOD_ ## _axis, \ |
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ |
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BIT(IIO_CHAN_INFO_SAMP_FREQ), \ |
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.address = KMX61_ACC, \ |
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.scan_index = KMX61_AXIS_ ## _axis, \ |
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.scan_type = { \ |
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.sign = 's', \ |
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.realbits = 12, \ |
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.storagebits = 16, \ |
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.shift = 4, \ |
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.endianness = IIO_LE, \ |
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}, \ |
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.event_spec = &kmx61_event, \ |
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.num_event_specs = 1 \ |
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} |
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#define KMX61_MAG_CHAN(_axis) { \ |
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.type = IIO_MAGN, \ |
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.modified = 1, \ |
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.channel2 = IIO_MOD_ ## _axis, \ |
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.address = KMX61_MAG, \ |
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.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ |
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.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \ |
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BIT(IIO_CHAN_INFO_SAMP_FREQ), \ |
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.scan_index = KMX61_AXIS_ ## _axis, \ |
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.scan_type = { \ |
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.sign = 's', \ |
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.realbits = 14, \ |
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.storagebits = 16, \ |
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.shift = 2, \ |
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.endianness = IIO_LE, \ |
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}, \ |
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} |
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static const struct iio_chan_spec kmx61_acc_channels[] = { |
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KMX61_ACC_CHAN(X), |
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KMX61_ACC_CHAN(Y), |
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KMX61_ACC_CHAN(Z), |
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}; |
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static const struct iio_chan_spec kmx61_mag_channels[] = { |
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KMX61_MAG_CHAN(X), |
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KMX61_MAG_CHAN(Y), |
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KMX61_MAG_CHAN(Z), |
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}; |
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static void kmx61_set_data(struct iio_dev *indio_dev, struct kmx61_data *data) |
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{ |
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struct kmx61_data **priv = iio_priv(indio_dev); |
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*priv = data; |
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} |
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static struct kmx61_data *kmx61_get_data(struct iio_dev *indio_dev) |
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{ |
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return *(struct kmx61_data **)iio_priv(indio_dev); |
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} |
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static int kmx61_convert_freq_to_bit(int val, int val2) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(kmx61_samp_freq_table); i++) |
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if (val == kmx61_samp_freq_table[i].val && |
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val2 == kmx61_samp_freq_table[i].val2) |
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return i; |
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return -EINVAL; |
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} |
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static int kmx61_convert_wake_up_odr_to_bit(int val, int val2) |
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{ |
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int i; |
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for (i = 0; i < ARRAY_SIZE(kmx61_wake_up_odr_table); ++i) |
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if (kmx61_wake_up_odr_table[i].val == val && |
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kmx61_wake_up_odr_table[i].val2 == val2) |
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return kmx61_wake_up_odr_table[i].odr_bits; |
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return -EINVAL; |
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} |
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/** |
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* kmx61_set_mode() - set KMX61 device operating mode |
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* @data: kmx61 device private data pointer |
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* @mode: bitmask, indicating operating mode for @device |
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* @device: bitmask, indicating device for which @mode needs to be set |
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* @update: update stby bits stored in device's private @data |
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* |
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* For each sensor (accelerometer/magnetometer) there are two operating modes |
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* STANDBY and OPERATION. Neither accel nor magn can be disabled independently |
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* if they are both enabled. Internal sensors state is saved in acc_stby and |
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* mag_stby members of driver's private @data. |
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*/ |
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static int kmx61_set_mode(struct kmx61_data *data, u8 mode, u8 device, |
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bool update) |
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{ |
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int ret; |
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int acc_stby = -1, mag_stby = -1; |
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ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); |
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if (ret < 0) { |
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dev_err(&data->client->dev, "Error reading reg_stby\n"); |
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return ret; |
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} |
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if (device & KMX61_ACC) { |
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if (mode & KMX61_ACC_STBY_BIT) { |
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ret |= KMX61_ACC_STBY_BIT; |
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acc_stby = 1; |
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} else { |
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ret &= ~KMX61_ACC_STBY_BIT; |
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acc_stby = 0; |
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} |
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} |
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if (device & KMX61_MAG) { |
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if (mode & KMX61_MAG_STBY_BIT) { |
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ret |= KMX61_MAG_STBY_BIT; |
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mag_stby = 1; |
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} else { |
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ret &= ~KMX61_MAG_STBY_BIT; |
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mag_stby = 0; |
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} |
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} |
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if (mode & KMX61_ACT_STBY_BIT) |
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ret |= KMX61_ACT_STBY_BIT; |
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ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_STBY, ret); |
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if (ret < 0) { |
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dev_err(&data->client->dev, "Error writing reg_stby\n"); |
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return ret; |
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} |
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if (acc_stby != -1 && update) |
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data->acc_stby = acc_stby; |
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if (mag_stby != -1 && update) |
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data->mag_stby = mag_stby; |
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return 0; |
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} |
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static int kmx61_get_mode(struct kmx61_data *data, u8 *mode, u8 device) |
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{ |
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int ret; |
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ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_STBY); |
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if (ret < 0) { |
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dev_err(&data->client->dev, "Error reading reg_stby\n"); |
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return ret; |
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} |
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*mode = 0; |
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if (device & KMX61_ACC) { |
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if (ret & KMX61_ACC_STBY_BIT) |
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*mode |= KMX61_ACC_STBY_BIT; |
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else |
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*mode &= ~KMX61_ACC_STBY_BIT; |
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} |
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if (device & KMX61_MAG) { |
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if (ret & KMX61_MAG_STBY_BIT) |
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*mode |= KMX61_MAG_STBY_BIT; |
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else |
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*mode &= ~KMX61_MAG_STBY_BIT; |
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} |
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return 0; |
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} |
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static int kmx61_set_wake_up_odr(struct kmx61_data *data, int val, int val2) |
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{ |
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int ret, odr_bits; |
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odr_bits = kmx61_convert_wake_up_odr_to_bit(val, val2); |
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if (odr_bits < 0) |
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return odr_bits; |
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ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL2, |
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odr_bits); |
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if (ret < 0) |
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dev_err(&data->client->dev, "Error writing reg_ctrl2\n"); |
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return ret; |
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} |
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static int kmx61_set_odr(struct kmx61_data *data, int val, int val2, u8 device) |
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{ |
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int ret; |
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u8 mode; |
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int lodr_bits, odr_bits; |
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ret = kmx61_get_mode(data, &mode, KMX61_ACC | KMX61_MAG); |
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if (ret < 0) |
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return ret; |
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lodr_bits = kmx61_convert_freq_to_bit(val, val2); |
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if (lodr_bits < 0) |
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return lodr_bits; |
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/* To change ODR, accel and magn must be in STDBY */ |
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ret = kmx61_set_mode(data, KMX61_ALL_STBY, KMX61_ACC | KMX61_MAG, |
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true); |
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if (ret < 0) |
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return ret; |
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odr_bits = 0; |
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if (device & KMX61_ACC) |
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odr_bits |= lodr_bits << KMX61_ACC_ODR_SHIFT; |
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if (device & KMX61_MAG) |
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odr_bits |= lodr_bits << KMX61_MAG_ODR_SHIFT; |
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ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_ODCNTL, |
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odr_bits); |
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if (ret < 0) |
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return ret; |
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data->odr_bits = odr_bits; |
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if (device & KMX61_ACC) { |
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ret = kmx61_set_wake_up_odr(data, val, val2); |
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if (ret) |
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return ret; |
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} |
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return kmx61_set_mode(data, mode, KMX61_ACC | KMX61_MAG, true); |
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} |
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static int kmx61_get_odr(struct kmx61_data *data, int *val, int *val2, |
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u8 device) |
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{ |
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u8 lodr_bits; |
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if (device & KMX61_ACC) |
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lodr_bits = (data->odr_bits >> KMX61_ACC_ODR_SHIFT) & |
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KMX61_ACC_ODR_MASK; |
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else if (device & KMX61_MAG) |
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lodr_bits = (data->odr_bits >> KMX61_MAG_ODR_SHIFT) & |
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KMX61_MAG_ODR_MASK; |
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else |
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return -EINVAL; |
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if (lodr_bits >= ARRAY_SIZE(kmx61_samp_freq_table)) |
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return -EINVAL; |
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*val = kmx61_samp_freq_table[lodr_bits].val; |
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*val2 = kmx61_samp_freq_table[lodr_bits].val2; |
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return 0; |
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} |
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static int kmx61_set_range(struct kmx61_data *data, u8 range) |
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{ |
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int ret; |
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ret = i2c_smbus_read_byte_data(data->client, KMX61_REG_CTRL1); |
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if (ret < 0) { |
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dev_err(&data->client->dev, "Error reading reg_ctrl1\n"); |
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return ret; |
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} |
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ret &= ~KMX61_REG_CTRL1_GSEL_MASK; |
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ret |= range & KMX61_REG_CTRL1_GSEL_MASK; |
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ret = i2c_smbus_write_byte_data(data->client, KMX61_REG_CTRL1, ret); |
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if (ret < 0) { |
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dev_err(&data->client->dev, "Error writing reg_ctrl1\n"); |
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return ret; |
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} |
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data->range = range; |
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return 0; |
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} |
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static int kmx61_set_scale(struct kmx61_data *data, u16 uscale) |
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{ |
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int ret, i; |
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u8 mode; |
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for (i = 0; i < ARRAY_SIZE(kmx61_uscale_table); i++) { |
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if (kmx61_uscale_table[i] == uscale) { |
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ret = kmx61_get_mode(data, &mode, |
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KMX61_ACC | KMX61_MAG); |
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if (ret < 0) |
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return ret; |
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ret = kmx61_set_mode(data, KMX61_ALL_STBY, |
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KMX61_ACC | KMX61_MAG, true); |
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if (ret < 0) |
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return ret; |
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|
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ret = kmx61_set_range(data, i); |
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if (ret < 0) |
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return ret; |
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|
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return kmx61_set_mode(data, mode, |
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KMX61_ACC | KMX61_MAG, true); |
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} |
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} |
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return -EINVAL; |
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} |
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static int kmx61_chip_init(struct kmx61_data *data) |
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{ |
|
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 = { |
|
.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 = { |
|
.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 void kmx61_trig_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"); |
|
} |
|
|
|
static const struct iio_trigger_ops kmx61_trigger_ops = { |
|
.set_trigger_state = kmx61_data_rdy_trigger_set_state, |
|
.reenable = kmx61_trig_reenable, |
|
}; |
|
|
|
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 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->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) { |
|
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 = pm_runtime_set_active(&client->dev); |
|
if (ret < 0) |
|
goto err_buffer_cleanup_mag; |
|
|
|
pm_runtime_enable(&client->dev); |
|
pm_runtime_set_autosuspend_delay(&client->dev, KMX61_SLEEP_DELAY_MS); |
|
pm_runtime_use_autosuspend(&client->dev); |
|
|
|
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; |
|
} |
|
|
|
return 0; |
|
|
|
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); |
|
|
|
iio_device_unregister(data->acc_indio_dev); |
|
iio_device_unregister(data->mag_indio_dev); |
|
|
|
pm_runtime_disable(&client->dev); |
|
pm_runtime_set_suspended(&client->dev); |
|
pm_runtime_put_noidle(&client->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 <[email protected]>"); |
|
MODULE_DESCRIPTION("KMX61 accelerometer/magnetometer driver"); |
|
MODULE_LICENSE("GPL v2");
|
|
|