2014-11-06 23:07:00 +00:00
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/*
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* KXCJK-1013 3-axis accelerometer driver
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* Copyright (c) 2014, Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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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/interrupt.h>
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#include <linux/delay.h>
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#include <linux/bitops.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/acpi.h>
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#include <linux/gpio/consumer.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/buffer.h>
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#include <linux/iio/trigger.h>
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#include <linux/iio/trigger_consumer.h>
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#include <linux/iio/triggered_buffer.h>
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#include <linux/iio/accel/kxcjk_1013.h>
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#define KXCJK1013_DRV_NAME "kxcjk1013"
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#define KXCJK1013_IRQ_NAME "kxcjk1013_event"
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#define KXCJK1013_REG_XOUT_L 0x06
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/*
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* From low byte X axis register, all the other addresses of Y and Z can be
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* obtained by just applying axis offset. The following axis defines are just
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* provide clarity, but not used.
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*/
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#define KXCJK1013_REG_XOUT_H 0x07
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#define KXCJK1013_REG_YOUT_L 0x08
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#define KXCJK1013_REG_YOUT_H 0x09
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#define KXCJK1013_REG_ZOUT_L 0x0A
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#define KXCJK1013_REG_ZOUT_H 0x0B
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#define KXCJK1013_REG_DCST_RESP 0x0C
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#define KXCJK1013_REG_WHO_AM_I 0x0F
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#define KXCJK1013_REG_INT_SRC1 0x16
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#define KXCJK1013_REG_INT_SRC2 0x17
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#define KXCJK1013_REG_STATUS_REG 0x18
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#define KXCJK1013_REG_INT_REL 0x1A
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#define KXCJK1013_REG_CTRL1 0x1B
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#define KXCJK1013_REG_CTRL2 0x1D
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#define KXCJK1013_REG_INT_CTRL1 0x1E
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#define KXCJK1013_REG_INT_CTRL2 0x1F
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#define KXCJK1013_REG_DATA_CTRL 0x21
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#define KXCJK1013_REG_WAKE_TIMER 0x29
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#define KXCJK1013_REG_SELF_TEST 0x3A
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#define KXCJK1013_REG_WAKE_THRES 0x6A
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#define KXCJK1013_REG_CTRL1_BIT_PC1 BIT(7)
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#define KXCJK1013_REG_CTRL1_BIT_RES BIT(6)
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#define KXCJK1013_REG_CTRL1_BIT_DRDY BIT(5)
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#define KXCJK1013_REG_CTRL1_BIT_GSEL1 BIT(4)
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#define KXCJK1013_REG_CTRL1_BIT_GSEL0 BIT(3)
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#define KXCJK1013_REG_CTRL1_BIT_WUFE BIT(1)
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#define KXCJK1013_REG_INT_REG1_BIT_IEA BIT(4)
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#define KXCJK1013_REG_INT_REG1_BIT_IEN BIT(5)
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#define KXCJK1013_DATA_MASK_12_BIT 0x0FFF
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#define KXCJK1013_MAX_STARTUP_TIME_US 100000
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struct kxcjk1013_data {
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struct i2c_client *client;
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struct iio_trigger *trig;
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bool trig_mode;
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struct mutex mutex;
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s16 buffer[8];
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int power_state;
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u8 odr_bits;
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bool active_high_intr;
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};
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enum kxcjk1013_axis {
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AXIS_X,
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AXIS_Y,
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AXIS_Z,
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};
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enum kxcjk1013_mode {
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STANDBY,
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OPERATION,
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};
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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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} samp_freq_table[] = { {0, 781000, 0x08}, {1, 563000, 0x09},
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{3, 125000, 0x0A}, {6, 25000, 0x0B}, {12, 5000, 0},
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{25, 0, 0x01}, {50, 0, 0x02}, {100, 0, 0x03},
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{200, 0, 0x04}, {400, 0, 0x05}, {800, 0, 0x06},
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{1600, 0, 0x07} };
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/* Refer to section 4 of the specification */
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static const struct {
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int odr_bits;
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int usec;
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} odr_start_up_times[] = { {0x08, 100000}, {0x09, 100000}, {0x0A, 100000},
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{0x0B, 100000}, { 0, 80000}, {0x01, 41000},
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{0x02, 21000}, {0x03, 11000}, {0x04, 6400},
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{0x05, 3900}, {0x06, 2700}, {0x07, 2100} };
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static int kxcjk1013_set_mode(struct kxcjk1013_data *data,
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enum kxcjk1013_mode mode)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_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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if (mode == STANDBY)
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ret &= ~KXCJK1013_REG_CTRL1_BIT_PC1;
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else
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ret |= KXCJK1013_REG_CTRL1_BIT_PC1;
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ret = i2c_smbus_write_byte_data(data->client,
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KXCJK1013_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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return 0;
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}
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static int kxcjk1013_chip_ack_intr(struct kxcjk1013_data *data)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_REL);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_rel\n");
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return ret;
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}
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return ret;
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}
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static int kxcjk1013_chip_init(struct kxcjk1013_data *data)
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{
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int ret;
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_WHO_AM_I);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading who_am_i\n");
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return ret;
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}
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dev_dbg(&data->client->dev, "KXCJK1013 Chip Id %x\n", ret);
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ret = kxcjk1013_set_mode(data, STANDBY);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_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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/* Setting range to 4G */
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ret |= KXCJK1013_REG_CTRL1_BIT_GSEL0;
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ret &= ~KXCJK1013_REG_CTRL1_BIT_GSEL1;
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/* Set 12 bit mode */
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ret |= KXCJK1013_REG_CTRL1_BIT_RES;
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ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_CTRL1,
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ret);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_ctrl\n");
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return ret;
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}
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_DATA_CTRL);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_data_ctrl\n");
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return ret;
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}
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data->odr_bits = ret;
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/* Set up INT polarity */
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
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return ret;
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}
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if (data->active_high_intr)
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ret |= KXCJK1013_REG_INT_REG1_BIT_IEA;
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else
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ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEA;
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ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
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ret);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
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return ret;
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}
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return 0;
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}
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static int kxcjk1013_chip_setup_interrupt(struct kxcjk1013_data *data,
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bool status)
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{
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int ret;
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/* This is requirement by spec to change state to STANDBY */
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ret = kxcjk1013_set_mode(data, STANDBY);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_REG_INT_CTRL1);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error reading reg_int_ctrl1\n");
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return ret;
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}
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if (status)
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ret |= KXCJK1013_REG_INT_REG1_BIT_IEN;
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else
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ret &= ~KXCJK1013_REG_INT_REG1_BIT_IEN;
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ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_INT_CTRL1,
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ret);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing reg_int_ctrl1\n");
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return ret;
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}
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ret = i2c_smbus_read_byte_data(data->client, KXCJK1013_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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if (status)
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ret |= KXCJK1013_REG_CTRL1_BIT_DRDY;
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else
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ret &= ~KXCJK1013_REG_CTRL1_BIT_DRDY;
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ret = i2c_smbus_write_byte_data(data->client,
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KXCJK1013_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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return ret;
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}
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static int kxcjk1013_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(samp_freq_table); ++i) {
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if (samp_freq_table[i].val == val &&
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samp_freq_table[i].val2 == val2) {
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return samp_freq_table[i].odr_bits;
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}
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}
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return -EINVAL;
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}
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static int kxcjk1013_set_odr(struct kxcjk1013_data *data, int val, int val2)
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{
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int ret;
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int odr_bits;
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odr_bits = kxcjk1013_convert_freq_to_bit(val, val2);
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if (odr_bits < 0)
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return odr_bits;
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/* To change ODR, the chip must be set to STANDBY as per spec */
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ret = kxcjk1013_set_mode(data, STANDBY);
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if (ret < 0)
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return ret;
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ret = i2c_smbus_write_byte_data(data->client, KXCJK1013_REG_DATA_CTRL,
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odr_bits);
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if (ret < 0) {
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dev_err(&data->client->dev, "Error writing data_ctrl\n");
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return ret;
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}
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data->odr_bits = odr_bits;
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/* Check, if the ODR is changed after data enable */
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if (data->power_state) {
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/* Set the state back to operation */
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ret = kxcjk1013_set_mode(data, OPERATION);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static int kxcjk1013_get_odr(struct kxcjk1013_data *data, int *val, int *val2)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(samp_freq_table); ++i) {
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if (samp_freq_table[i].odr_bits == data->odr_bits) {
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*val = samp_freq_table[i].val;
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*val2 = samp_freq_table[i].val2;
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return IIO_VAL_INT_PLUS_MICRO;
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}
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}
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return -EINVAL;
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}
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static int kxcjk1013_get_acc_reg(struct kxcjk1013_data *data, int axis)
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{
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u8 reg = KXCJK1013_REG_XOUT_L + axis * 2;
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int ret;
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ret = i2c_smbus_read_word_data(data->client, reg);
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if (ret < 0) {
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dev_err(&data->client->dev,
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"failed to read accel_%c registers\n", 'x' + axis);
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return ret;
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}
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return ret;
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}
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static int kxcjk1013_get_startup_times(struct kxcjk1013_data *data)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(odr_start_up_times); ++i) {
|
|
|
|
if (odr_start_up_times[i].odr_bits == data->odr_bits)
|
|
|
|
return odr_start_up_times[i].usec;
|
|
|
|
}
|
|
|
|
|
|
|
|
return KXCJK1013_MAX_STARTUP_TIME_US;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_read_raw(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan, int *val,
|
|
|
|
int *val2, long mask)
|
|
|
|
{
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
switch (mask) {
|
|
|
|
case IIO_CHAN_INFO_RAW:
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
if (iio_buffer_enabled(indio_dev))
|
|
|
|
ret = -EBUSY;
|
|
|
|
else {
|
|
|
|
int sleep_val;
|
|
|
|
|
|
|
|
ret = kxcjk1013_set_mode(data, OPERATION);
|
2014-06-16 19:00:00 +00:00
|
|
|
if (ret < 0) {
|
|
|
|
mutex_unlock(&data->mutex);
|
2014-11-06 23:07:00 +00:00
|
|
|
return ret;
|
2014-06-16 19:00:00 +00:00
|
|
|
}
|
2014-11-06 23:07:00 +00:00
|
|
|
++data->power_state;
|
|
|
|
sleep_val = kxcjk1013_get_startup_times(data);
|
|
|
|
if (sleep_val < 20000)
|
|
|
|
usleep_range(sleep_val, 20000);
|
|
|
|
else
|
|
|
|
msleep_interruptible(sleep_val/1000);
|
|
|
|
ret = kxcjk1013_get_acc_reg(data, chan->scan_index);
|
|
|
|
if (--data->power_state == 0)
|
|
|
|
kxcjk1013_set_mode(data, STANDBY);
|
|
|
|
}
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
*val = sign_extend32(ret >> 4, 11);
|
|
|
|
return IIO_VAL_INT;
|
|
|
|
|
|
|
|
case IIO_CHAN_INFO_SCALE:
|
|
|
|
*val = 0;
|
|
|
|
*val2 = 19163; /* range +-4g (4/2047*9.806650) */
|
|
|
|
return IIO_VAL_INT_PLUS_MICRO;
|
|
|
|
|
|
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
ret = kxcjk1013_get_odr(data, val, val2);
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
default:
|
|
|
|
return -EINVAL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_write_raw(struct iio_dev *indio_dev,
|
|
|
|
struct iio_chan_spec const *chan, int val,
|
|
|
|
int val2, long mask)
|
|
|
|
{
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
switch (mask) {
|
|
|
|
case IIO_CHAN_INFO_SAMP_FREQ:
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
ret = kxcjk1013_set_odr(data, val, val2);
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
ret = -EINVAL;
|
|
|
|
}
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_validate_trigger(struct iio_dev *indio_dev,
|
|
|
|
struct iio_trigger *trig)
|
|
|
|
{
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
|
|
|
|
if (data->trig != trig)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
|
|
|
|
"0.781000 1.563000 3.125000 6.250000 12.500000 25 50 100 200 400 800 1600");
|
|
|
|
|
|
|
|
static struct attribute *kxcjk1013_attributes[] = {
|
|
|
|
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
|
|
|
|
NULL,
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct attribute_group kxcjk1013_attrs_group = {
|
|
|
|
.attrs = kxcjk1013_attributes,
|
|
|
|
};
|
|
|
|
|
|
|
|
#define KXCJK1013_CHANNEL(_axis) { \
|
|
|
|
.type = IIO_ACCEL, \
|
|
|
|
.modified = 1, \
|
|
|
|
.channel2 = IIO_MOD_##_axis, \
|
|
|
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \
|
|
|
|
.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | \
|
|
|
|
BIT(IIO_CHAN_INFO_SAMP_FREQ), \
|
|
|
|
.scan_index = AXIS_##_axis, \
|
|
|
|
.scan_type = { \
|
|
|
|
.sign = 's', \
|
|
|
|
.realbits = 12, \
|
|
|
|
.storagebits = 16, \
|
|
|
|
.shift = 4, \
|
|
|
|
.endianness = IIO_LE, \
|
|
|
|
}, \
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iio_chan_spec kxcjk1013_channels[] = {
|
|
|
|
KXCJK1013_CHANNEL(X),
|
|
|
|
KXCJK1013_CHANNEL(Y),
|
|
|
|
KXCJK1013_CHANNEL(Z),
|
|
|
|
IIO_CHAN_SOFT_TIMESTAMP(3),
|
|
|
|
};
|
|
|
|
|
|
|
|
static const struct iio_info kxcjk1013_info = {
|
|
|
|
.attrs = &kxcjk1013_attrs_group,
|
|
|
|
.read_raw = kxcjk1013_read_raw,
|
|
|
|
.write_raw = kxcjk1013_write_raw,
|
|
|
|
.validate_trigger = kxcjk1013_validate_trigger,
|
|
|
|
.driver_module = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
|
|
|
static irqreturn_t kxcjk1013_trigger_handler(int irq, void *p)
|
|
|
|
{
|
|
|
|
struct iio_poll_func *pf = p;
|
|
|
|
struct iio_dev *indio_dev = pf->indio_dev;
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
int bit, ret, i = 0;
|
|
|
|
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
|
|
|
|
for_each_set_bit(bit, indio_dev->buffer->scan_mask,
|
|
|
|
indio_dev->masklength) {
|
|
|
|
ret = kxcjk1013_get_acc_reg(data, bit);
|
|
|
|
if (ret < 0) {
|
|
|
|
kxcjk1013_chip_ack_intr(data);
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
goto err;
|
|
|
|
}
|
|
|
|
data->buffer[i++] = ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
kxcjk1013_chip_ack_intr(data);
|
|
|
|
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
|
|
|
|
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,
|
|
|
|
pf->timestamp);
|
|
|
|
err:
|
|
|
|
iio_trigger_notify_done(indio_dev->trig);
|
|
|
|
|
|
|
|
return IRQ_HANDLED;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_data_rdy_trigger_set_state(struct iio_trigger *trig,
|
|
|
|
bool state)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
if (state) {
|
|
|
|
kxcjk1013_chip_setup_interrupt(data, true);
|
|
|
|
kxcjk1013_set_mode(data, OPERATION);
|
|
|
|
++data->power_state;
|
|
|
|
} else {
|
2014-06-16 19:00:00 +00:00
|
|
|
if (--data->power_state) {
|
|
|
|
mutex_unlock(&data->mutex);
|
2014-11-06 23:07:00 +00:00
|
|
|
return 0;
|
2014-06-16 19:00:00 +00:00
|
|
|
}
|
2014-11-06 23:07:00 +00:00
|
|
|
kxcjk1013_chip_setup_interrupt(data, false);
|
|
|
|
kxcjk1013_set_mode(data, STANDBY);
|
|
|
|
}
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static const struct iio_trigger_ops kxcjk1013_trigger_ops = {
|
|
|
|
.set_trigger_state = kxcjk1013_data_rdy_trigger_set_state,
|
|
|
|
.owner = THIS_MODULE,
|
|
|
|
};
|
|
|
|
|
|
|
|
static int kxcjk1013_acpi_gpio_probe(struct i2c_client *client,
|
|
|
|
struct kxcjk1013_data *data)
|
|
|
|
{
|
|
|
|
const struct acpi_device_id *id;
|
|
|
|
struct device *dev;
|
|
|
|
struct gpio_desc *gpio;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (!client)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
dev = &client->dev;
|
|
|
|
if (!ACPI_HANDLE(dev))
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
id = acpi_match_device(dev->driver->acpi_match_table, dev);
|
|
|
|
if (!id)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
/* data ready gpio interrupt pin */
|
|
|
|
gpio = devm_gpiod_get_index(dev, "kxcjk1013_int", 0);
|
|
|
|
if (IS_ERR(gpio)) {
|
|
|
|
dev_err(dev, "acpi gpio get index failed\n");
|
|
|
|
return PTR_ERR(gpio);
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = gpiod_direction_input(gpio);
|
|
|
|
if (ret)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
ret = gpiod_to_irq(gpio);
|
|
|
|
|
|
|
|
dev_dbg(dev, "GPIO resource, no:%d irq:%d\n", desc_to_gpio(gpio), ret);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_probe(struct i2c_client *client,
|
|
|
|
const struct i2c_device_id *id)
|
|
|
|
{
|
|
|
|
struct kxcjk1013_data *data;
|
|
|
|
struct iio_dev *indio_dev;
|
|
|
|
struct iio_trigger *trig = NULL;
|
|
|
|
struct kxcjk_1013_platform_data *pdata;
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
|
|
|
|
if (!indio_dev)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data = iio_priv(indio_dev);
|
|
|
|
i2c_set_clientdata(client, indio_dev);
|
|
|
|
data->client = client;
|
|
|
|
|
|
|
|
pdata = dev_get_platdata(&client->dev);
|
|
|
|
if (pdata)
|
|
|
|
data->active_high_intr = pdata->active_high_intr;
|
|
|
|
else
|
|
|
|
data->active_high_intr = true; /* default polarity */
|
|
|
|
|
|
|
|
ret = kxcjk1013_chip_init(data);
|
|
|
|
if (ret < 0)
|
|
|
|
return ret;
|
|
|
|
|
|
|
|
mutex_init(&data->mutex);
|
|
|
|
|
|
|
|
indio_dev->dev.parent = &client->dev;
|
|
|
|
indio_dev->channels = kxcjk1013_channels;
|
|
|
|
indio_dev->num_channels = ARRAY_SIZE(kxcjk1013_channels);
|
|
|
|
indio_dev->name = KXCJK1013_DRV_NAME;
|
|
|
|
indio_dev->modes = INDIO_DIRECT_MODE;
|
|
|
|
indio_dev->info = &kxcjk1013_info;
|
|
|
|
|
|
|
|
if (client->irq < 0)
|
|
|
|
client->irq = kxcjk1013_acpi_gpio_probe(client, data);
|
|
|
|
|
|
|
|
if (client->irq >= 0) {
|
|
|
|
trig = iio_trigger_alloc("%s-dev%d", indio_dev->name,
|
|
|
|
indio_dev->id);
|
|
|
|
if (!trig)
|
|
|
|
return -ENOMEM;
|
|
|
|
|
|
|
|
data->trig_mode = true;
|
|
|
|
|
|
|
|
ret = devm_request_irq(&client->dev, client->irq,
|
|
|
|
iio_trigger_generic_data_rdy_poll,
|
|
|
|
IRQF_TRIGGER_RISING,
|
|
|
|
KXCJK1013_IRQ_NAME,
|
|
|
|
trig);
|
|
|
|
if (ret) {
|
|
|
|
dev_err(&client->dev, "unable to request IRQ\n");
|
|
|
|
goto err_trigger_free;
|
|
|
|
}
|
|
|
|
|
|
|
|
trig->dev.parent = &client->dev;
|
|
|
|
trig->ops = &kxcjk1013_trigger_ops;
|
|
|
|
iio_trigger_set_drvdata(trig, indio_dev);
|
|
|
|
data->trig = trig;
|
|
|
|
indio_dev->trig = trig;
|
|
|
|
|
|
|
|
ret = iio_trigger_register(trig);
|
|
|
|
if (ret)
|
|
|
|
goto err_trigger_free;
|
|
|
|
|
|
|
|
ret = iio_triggered_buffer_setup(indio_dev,
|
|
|
|
&iio_pollfunc_store_time,
|
|
|
|
kxcjk1013_trigger_handler,
|
|
|
|
NULL);
|
|
|
|
if (ret < 0) {
|
|
|
|
dev_err(&client->dev,
|
|
|
|
"iio triggered buffer setup failed\n");
|
|
|
|
goto err_trigger_unregister;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
ret = devm_iio_device_register(&client->dev, indio_dev);
|
|
|
|
if (ret < 0) {
|
|
|
|
dev_err(&client->dev, "unable to register iio device\n");
|
|
|
|
goto err_buffer_cleanup;
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
err_buffer_cleanup:
|
|
|
|
if (data->trig_mode)
|
|
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
|
|
err_trigger_unregister:
|
|
|
|
if (data->trig_mode)
|
|
|
|
iio_trigger_unregister(trig);
|
|
|
|
err_trigger_free:
|
|
|
|
if (data->trig_mode)
|
|
|
|
iio_trigger_free(trig);
|
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_remove(struct i2c_client *client)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(client);
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
|
|
|
|
if (data->trig_mode) {
|
|
|
|
iio_triggered_buffer_cleanup(indio_dev);
|
|
|
|
iio_trigger_unregister(data->trig);
|
|
|
|
iio_trigger_free(data->trig);
|
|
|
|
}
|
|
|
|
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
kxcjk1013_set_mode(data, STANDBY);
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
|
|
static int kxcjk1013_suspend(struct device *dev)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
|
|
|
|
|
|
|
|
mutex_lock(&data->mutex);
|
|
|
|
kxcjk1013_set_mode(data, STANDBY);
|
|
|
|
mutex_unlock(&data->mutex);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int kxcjk1013_resume(struct device *dev)
|
|
|
|
{
|
|
|
|
struct iio_dev *indio_dev = i2c_get_clientdata(to_i2c_client(dev));
|
|
|
|
struct kxcjk1013_data *data = iio_priv(indio_dev);
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|
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|
mutex_lock(&data->mutex);
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|
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|
|
|
|
if (data->power_state)
|
|
|
|
kxcjk1013_set_mode(data, OPERATION);
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|
|
|
|
|
|
|
mutex_unlock(&data->mutex);
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|
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|
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return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static SIMPLE_DEV_PM_OPS(kxcjk1013_pm_ops, kxcjk1013_suspend, kxcjk1013_resume);
|
|
|
|
#define KXCJK1013_PM_OPS (&kxcjk1013_pm_ops)
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|
|
|
#else
|
|
|
|
#define KXCJK1013_PM_OPS NULL
|
|
|
|
#endif
|
|
|
|
|
|
|
|
static const struct acpi_device_id kx_acpi_match[] = {
|
|
|
|
{"KXCJ1013", 0},
|
|
|
|
{ },
|
|
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(acpi, kx_acpi_match);
|
|
|
|
|
|
|
|
static const struct i2c_device_id kxcjk1013_id[] = {
|
|
|
|
{"kxcjk1013", 0},
|
|
|
|
{}
|
|
|
|
};
|
|
|
|
|
|
|
|
MODULE_DEVICE_TABLE(i2c, kxcjk1013_id);
|
|
|
|
|
|
|
|
static struct i2c_driver kxcjk1013_driver = {
|
|
|
|
.driver = {
|
|
|
|
.name = KXCJK1013_DRV_NAME,
|
|
|
|
.acpi_match_table = ACPI_PTR(kx_acpi_match),
|
|
|
|
.pm = KXCJK1013_PM_OPS,
|
|
|
|
},
|
|
|
|
.probe = kxcjk1013_probe,
|
|
|
|
.remove = kxcjk1013_remove,
|
|
|
|
.id_table = kxcjk1013_id,
|
|
|
|
};
|
|
|
|
module_i2c_driver(kxcjk1013_driver);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>");
|
|
|
|
MODULE_LICENSE("GPL v2");
|
|
|
|
MODULE_DESCRIPTION("KXCJK1013 accelerometer driver");
|