// SPDX-License-Identifier: GPL-2.0+
/*
* ADXL380 3-Axis Digital Accelerometer core driver
*
* Copyright 2024 Analog Devices Inc.
*/
#include <linux/bitfield.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/regmap.h>
#include <linux/units.h>
#include <linux/unaligned.h>
#include <linux/iio/buffer.h>
#include <linux/iio/events.h>
#include <linux/iio/iio.h>
#include <linux/iio/kfifo_buf.h>
#include <linux/iio/sysfs.h>
#include <linux/regulator/consumer.h>
#include "adxl380.h"
#define ADXL380_ID_VAL 380
#define ADXL382_ID_VAL 382
#define ADXL380_DEVID_AD_REG 0x00
#define ADLX380_PART_ID_REG 0x02
#define ADXL380_X_DATA_H_REG 0x15
#define ADXL380_Y_DATA_H_REG 0x17
#define ADXL380_Z_DATA_H_REG 0x19
#define ADXL380_T_DATA_H_REG 0x1B
#define ADXL380_MISC_0_REG 0x20
#define ADXL380_XL382_MSK BIT(7)
#define ADXL380_MISC_1_REG 0x21
#define ADXL380_X_DSM_OFFSET_REG 0x4D
#define ADXL380_ACT_INACT_CTL_REG 0x37
#define ADXL380_INACT_EN_MSK BIT(2)
#define ADXL380_ACT_EN_MSK BIT(0)
#define ADXL380_SNSR_AXIS_EN_REG 0x38
#define ADXL380_ACT_INACT_AXIS_EN_MSK GENMASK(2, 0)
#define ADXL380_THRESH_ACT_H_REG 0x39
#define ADXL380_TIME_ACT_H_REG 0x3B
#define ADXL380_THRESH_INACT_H_REG 0x3E
#define ADXL380_TIME_INACT_H_REG 0x40
#define ADXL380_THRESH_MAX GENMASK(12, 0)
#define ADXL380_TIME_MAX GENMASK(24, 0)
#define ADXL380_FIFO_CONFIG_0_REG 0x30
#define ADXL380_FIFO_SAMPLES_8_MSK BIT(0)
#define ADXL380_FIFO_MODE_MSK GENMASK(5, 4)
#define ADXL380_FIFO_DISABLED 0
#define ADXL380_FIFO_NORMAL 1
#define ADXL380_FIFO_STREAMED 2
#define ADXL380_FIFO_TRIGGERED 3
#define ADXL380_FIFO_CONFIG_1_REG 0x31
#define ADXL380_FIFO_STATUS_0_REG 0x1E
#define ADXL380_TAP_THRESH_REG 0x43
#define ADXL380_TAP_DUR_REG 0x44
#define ADXL380_TAP_LATENT_REG 0x45
#define ADXL380_TAP_WINDOW_REG 0x46
#define ADXL380_TAP_TIME_MAX GENMASK(7, 0)
#define ADXL380_TAP_CFG_REG 0x47
#define ADXL380_TAP_AXIS_MSK GENMASK(1, 0)
#define ADXL380_TRIG_CFG_REG 0x49
#define ADXL380_TRIG_CFG_DEC_2X_MSK BIT(7)
#define ADXL380_TRIG_CFG_SINC_RATE_MSK BIT(6)
#define ADXL380_FILTER_REG 0x50
#define ADXL380_FILTER_EQ_FILT_MSK BIT(6)
#define ADXL380_FILTER_LPF_MODE_MSK GENMASK(5, 4)
#define ADXL380_FILTER_HPF_PATH_MSK BIT(3)
#define ADXL380_FILTER_HPF_CORNER_MSK GENMASK(2, 0)
#define ADXL380_OP_MODE_REG 0x26
#define ADXL380_OP_MODE_RANGE_MSK GENMASK(7, 6)
#define ADXL380_OP_MODE_MSK GENMASK(3, 0)
#define ADXL380_OP_MODE_STANDBY 0
#define ADXL380_OP_MODE_HEART_SOUND 1
#define ADXL380_OP_MODE_ULP 2
#define ADXL380_OP_MODE_VLP 3
#define ADXL380_OP_MODE_LP 4
#define ADXL380_OP_MODE_LP_ULP 6
#define ADXL380_OP_MODE_LP_VLP 7
#define ADXL380_OP_MODE_RBW 8
#define ADXL380_OP_MODE_RBW_ULP 10
#define ADXL380_OP_MODE_RBW_VLP 11
#define ADXL380_OP_MODE_HP 12
#define ADXL380_OP_MODE_HP_ULP 14
#define ADXL380_OP_MODE_HP_VLP 15
#define ADXL380_OP_MODE_4G_RANGE 0
#define ADXL382_OP_MODE_15G_RANGE 0
#define ADXL380_OP_MODE_8G_RANGE 1
#define ADXL382_OP_MODE_30G_RANGE 1
#define ADXL380_OP_MODE_16G_RANGE 2
#define ADXL382_OP_MODE_60G_RANGE 2
#define ADXL380_DIG_EN_REG 0x27
#define ADXL380_CHAN_EN_MSK(chan) BIT(4 + (chan))
#define ADXL380_FIFO_EN_MSK BIT(3)
#define ADXL380_INT0_MAP0_REG 0x2B
#define ADXL380_INT1_MAP0_REG 0x2D
#define ADXL380_INT_MAP0_INACT_INT0_MSK BIT(6)
#define ADXL380_INT_MAP0_ACT_INT0_MSK BIT(5)
#define ADXL380_INT_MAP0_FIFO_WM_INT0_MSK BIT(3)
#define ADXL380_INT0_MAP1_REG 0x2C
#define ADXL380_INT1_MAP1_REG 0x2E
#define ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK BIT(1)
#define ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK BIT(0)
#define ADXL380_INT0_REG 0x5D
#define ADXL380_INT0_POL_MSK BIT(7)
#define ADXL380_RESET_REG 0x2A
#define ADXL380_FIFO_DATA 0x1D
#define ADXL380_DEVID_AD_VAL 0xAD
#define ADXL380_RESET_CODE 0x52
#define ADXL380_STATUS_0_REG 0x11
#define ADXL380_STATUS_0_FIFO_FULL_MSK BIT(1)
#define ADXL380_STATUS_0_FIFO_WM_MSK BIT(3)
#define ADXL380_STATUS_1_INACT_MSK BIT(6)
#define ADXL380_STATUS_1_ACT_MSK BIT(5)
#define ADXL380_STATUS_1_DOUBLE_TAP_MSK BIT(1)
#define ADXL380_STATUS_1_SINGLE_TAP_MSK BIT(0)
#define ADXL380_FIFO_SAMPLES 315UL
enum adxl380_channels {
ADXL380_ACCEL_X,
ADXL380_ACCEL_Y,
ADXL380_ACCEL_Z,
ADXL380_TEMP,
ADXL380_CH_NUM
};
enum adxl380_axis {
ADXL380_X_AXIS,
ADXL380_Y_AXIS,
ADXL380_Z_AXIS,
};
enum adxl380_activity_type {
ADXL380_ACTIVITY,
ADXL380_INACTIVITY,
};
enum adxl380_tap_type {
ADXL380_SINGLE_TAP,
ADXL380_DOUBLE_TAP,
};
enum adxl380_tap_time_type {
ADXL380_TAP_TIME_LATENT,
ADXL380_TAP_TIME_WINDOW,
};
static const int adxl380_range_scale_factor_tbl[] = { 1, 2, 4 };
const struct adxl380_chip_info adxl380_chip_info = {
.name = "adxl380",
.chip_id = ADXL380_ID_VAL,
.scale_tbl = {
[ADXL380_OP_MODE_4G_RANGE] = { 0, 1307226 },
[ADXL380_OP_MODE_8G_RANGE] = { 0, 2615434 },
[ADXL380_OP_MODE_16G_RANGE] = { 0, 5229886 },
},
.samp_freq_tbl = { 8000, 16000, 32000 },
/*
* The datasheet defines an intercept of 470 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 470,
};
EXPORT_SYMBOL_NS_GPL(adxl380_chip_info, IIO_ADXL380);
const struct adxl380_chip_info adxl382_chip_info = {
.name = "adxl382",
.chip_id = ADXL382_ID_VAL,
.scale_tbl = {
[ADXL382_OP_MODE_15G_RANGE] = { 0, 4903325 },
[ADXL382_OP_MODE_30G_RANGE] = { 0, 9806650 },
[ADXL382_OP_MODE_60G_RANGE] = { 0, 19613300 },
},
.samp_freq_tbl = { 16000, 32000, 64000 },
/*
* The datasheet defines an intercept of 570 LSB at 25 degC
* and a sensitivity of 10.2 LSB/C.
*/
.temp_offset = 25 * 102 / 10 - 570,
};
EXPORT_SYMBOL_NS_GPL(adxl382_chip_info, IIO_ADXL380);
static const unsigned int adxl380_th_reg_high_addr[2] = {
[ADXL380_ACTIVITY] = ADXL380_THRESH_ACT_H_REG,
[ADXL380_INACTIVITY] = ADXL380_THRESH_INACT_H_REG,
};
static const unsigned int adxl380_time_reg_high_addr[2] = {
[ADXL380_ACTIVITY] = ADXL380_TIME_ACT_H_REG,
[ADXL380_INACTIVITY] = ADXL380_TIME_INACT_H_REG,
};
static const unsigned int adxl380_tap_time_reg[2] = {
[ADXL380_TAP_TIME_LATENT] = ADXL380_TAP_LATENT_REG,
[ADXL380_TAP_TIME_WINDOW] = ADXL380_TAP_WINDOW_REG,
};
struct adxl380_state {
struct regmap *regmap;
struct device *dev;
const struct adxl380_chip_info *chip_info;
/*
* Synchronize access to members of driver state, and ensure atomicity
* of consecutive regmap operations.
*/
struct mutex lock;
enum adxl380_axis tap_axis_en;
u8 range;
u8 odr;
u8 fifo_set_size;
u8 transf_buf[3];
u16 watermark;
u32 act_time_ms;
u32 act_threshold;
u32 inact_time_ms;
u32 inact_threshold;
u32 tap_latent_us;
u32 tap_window_us;
u32 tap_duration_us;
u32 tap_threshold;
int irq;
int int_map[2];
int lpf_tbl[4];
int hpf_tbl[7][2];
__be16 fifo_buf[ADXL380_FIFO_SAMPLES] __aligned(IIO_DMA_MINALIGN);
};
bool adxl380_readable_noinc_reg(struct device *dev, unsigned int reg)
{
return reg == ADXL380_FIFO_DATA;
}
EXPORT_SYMBOL_NS_GPL(adxl380_readable_noinc_reg, IIO_ADXL380);
static int adxl380_set_measure_en(struct adxl380_state *st, bool en)
{
int ret;
unsigned int act_inact_ctl;
u8 op_mode = ADXL380_OP_MODE_STANDBY;
if (en) {
ret = regmap_read(st->regmap, ADXL380_ACT_INACT_CTL_REG, &act_inact_ctl);
if (ret)
return ret;
/* Activity/ Inactivity detection available only in VLP/ULP mode */
if (FIELD_GET(ADXL380_ACT_EN_MSK, act_inact_ctl) ||
FIELD_GET(ADXL380_INACT_EN_MSK, act_inact_ctl))
op_mode = ADXL380_OP_MODE_VLP;
else
op_mode = ADXL380_OP_MODE_HP;
}
return regmap_update_bits(st->regmap, ADXL380_OP_MODE_REG,
ADXL380_OP_MODE_MSK,
FIELD_PREP(ADXL380_OP_MODE_MSK, op_mode));
}
static void adxl380_scale_act_inact_thresholds(struct adxl380_state *st,
u8 old_range,
u8 new_range)
{
st->act_threshold = mult_frac(st->act_threshold,
adxl380_range_scale_factor_tbl[old_range],
adxl380_range_scale_factor_tbl[new_range]);
st->inact_threshold = mult_frac(st->inact_threshold,
adxl380_range_scale_factor_tbl[old_range],
adxl380_range_scale_factor_tbl[new_range]);
}
static int adxl380_write_act_inact_threshold(struct adxl380_state *st,
enum adxl380_activity_type act,
unsigned int th)
{
int ret;
u8 reg = adxl380_th_reg_high_addr[act];
if (th > ADXL380_THRESH_MAX)
return -EINVAL;
ret = regmap_write(st->regmap, reg + 1, th & GENMASK(7, 0));
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, reg, GENMASK(2, 0), th >> 8);
if (ret)
return ret;
if (act == ADXL380_ACTIVITY)
st->act_threshold = th;
else
st->inact_threshold = th;
return 0;
}
static int adxl380_set_act_inact_threshold(struct iio_dev *indio_dev,
enum adxl380_activity_type act,
u16 th)
{
struct adxl380_state *st = iio_priv(indio_dev);
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = adxl380_write_act_inact_threshold(st, act, th);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_set_tap_threshold_value(struct iio_dev *indio_dev, u8 th)
{
int ret;
struct adxl380_state *st = iio_priv(indio_dev);
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_write(st->regmap, ADXL380_TAP_THRESH_REG, th);
if (ret)
return ret;
st->tap_threshold = th;
return adxl380_set_measure_en(st, true);
}
static int _adxl380_write_tap_time_us(struct adxl380_state *st,
enum adxl380_tap_time_type tap_time_type,
u32 us)
{
u8 reg = adxl380_tap_time_reg[tap_time_type];
unsigned int reg_val;
int ret;
/* scale factor for tap window is 1250us / LSB */
reg_val = DIV_ROUND_CLOSEST(us, 1250);
if (reg_val > ADXL380_TAP_TIME_MAX)
reg_val = ADXL380_TAP_TIME_MAX;
ret = regmap_write(st->regmap, reg, reg_val);
if (ret)
return ret;
if (tap_time_type == ADXL380_TAP_TIME_WINDOW)
st->tap_window_us = us;
else
st->tap_latent_us = us;
return 0;
}
static int adxl380_write_tap_time_us(struct adxl380_state *st,
enum adxl380_tap_time_type tap_time_type, u32 us)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = _adxl380_write_tap_time_us(st, tap_time_type, us);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_write_tap_dur_us(struct iio_dev *indio_dev, u32 us)
{
int ret;
unsigned int reg_val;
struct adxl380_state *st = iio_priv(indio_dev);
/* 625us per code is the scale factor of TAP_DUR register */
reg_val = DIV_ROUND_CLOSEST(us, 625);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_write(st->regmap, ADXL380_TAP_DUR_REG, reg_val);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_read_chn(struct adxl380_state *st, u8 addr)
{
int ret;
guard(mutex)(&st->lock);
ret = regmap_bulk_read(st->regmap, addr, &st->transf_buf, 2);
if (ret)
return ret;
return get_unaligned_be16(st->transf_buf);
}
static int adxl380_get_odr(struct adxl380_state *st, int *odr)
{
int ret;
unsigned int trig_cfg, odr_idx;
ret = regmap_read(st->regmap, ADXL380_TRIG_CFG_REG, &trig_cfg);
if (ret)
return ret;
odr_idx = (FIELD_GET(ADXL380_TRIG_CFG_SINC_RATE_MSK, trig_cfg) << 1) |
(FIELD_GET(ADXL380_TRIG_CFG_DEC_2X_MSK, trig_cfg) & 1);
*odr = st->chip_info->samp_freq_tbl[odr_idx];
return 0;
}
static const int adxl380_lpf_div[] = {
1, 4, 8, 16,
};
static int adxl380_fill_lpf_tbl(struct adxl380_state *st)
{
int ret, i;
int odr;
ret = adxl380_get_odr(st, &odr);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(st->lpf_tbl); i++)
st->lpf_tbl[i] = DIV_ROUND_CLOSEST(odr, adxl380_lpf_div[i]);
return 0;
}
static const int adxl380_hpf_mul[] = {
0, 247000, 62084, 15545, 3862, 954, 238,
};
static int adxl380_fill_hpf_tbl(struct adxl380_state *st)
{
int i, ret, odr_hz;
u32 multiplier;
u64 div, rem, odr;
ret = adxl380_get_odr(st, &odr_hz);
if (ret)
return ret;
for (i = 0; i < ARRAY_SIZE(adxl380_hpf_mul); i++) {
odr = mul_u64_u32_shr(odr_hz, MEGA, 0);
multiplier = adxl380_hpf_mul[i];
div = div64_u64_rem(mul_u64_u32_shr(odr, multiplier, 0),
TERA * 100, &rem);
st->hpf_tbl[i][0] = div;
st->hpf_tbl[i][1] = div_u64(rem, MEGA * 100);
}
return 0;
}
static int adxl380_set_odr(struct adxl380_state *st, u8 odr)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, ADXL380_TRIG_CFG_REG,
ADXL380_TRIG_CFG_DEC_2X_MSK,
FIELD_PREP(ADXL380_TRIG_CFG_DEC_2X_MSK, odr & 1));
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, ADXL380_TRIG_CFG_REG,
ADXL380_TRIG_CFG_SINC_RATE_MSK,
FIELD_PREP(ADXL380_TRIG_CFG_SINC_RATE_MSK, odr >> 1));
if (ret)
return ret;
ret = adxl380_set_measure_en(st, true);
if (ret)
return ret;
ret = adxl380_fill_lpf_tbl(st);
if (ret)
return ret;
return adxl380_fill_hpf_tbl(st);
}
static int adxl380_find_match_1d_tbl(const int *array, unsigned int size,
int val)
{
int i;
for (i = 0; i < size; i++) {
if (val == array[i])
return i;
}
return size - 1;
}
static int adxl380_find_match_2d_tbl(const int (*freq_tbl)[2], int n, int val, int val2)
{
int i;
for (i = 0; i < n; i++) {
if (freq_tbl[i][0] == val && freq_tbl[i][1] == val2)
return i;
}
return -EINVAL;
}
static int adxl380_get_lpf(struct adxl380_state *st, int *lpf)
{
int ret;
unsigned int trig_cfg, lpf_idx;
guard(mutex)(&st->lock);
ret = regmap_read(st->regmap, ADXL380_FILTER_REG, &trig_cfg);
if (ret)
return ret;
lpf_idx = FIELD_GET(ADXL380_FILTER_LPF_MODE_MSK, trig_cfg);
*lpf = st->lpf_tbl[lpf_idx];
return 0;
}
static int adxl380_set_lpf(struct adxl380_state *st, u8 lpf)
{
int ret;
u8 eq_bypass = 0;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
if (lpf)
eq_bypass = 1;
ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
ADXL380_FILTER_EQ_FILT_MSK,
FIELD_PREP(ADXL380_FILTER_EQ_FILT_MSK, eq_bypass));
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
ADXL380_FILTER_LPF_MODE_MSK,
FIELD_PREP(ADXL380_FILTER_LPF_MODE_MSK, lpf));
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_get_hpf(struct adxl380_state *st, int *hpf_int, int *hpf_frac)
{
int ret;
unsigned int trig_cfg, hpf_idx;
guard(mutex)(&st->lock);
ret = regmap_read(st->regmap, ADXL380_FILTER_REG, &trig_cfg);
if (ret)
return ret;
hpf_idx = FIELD_GET(ADXL380_FILTER_HPF_CORNER_MSK, trig_cfg);
*hpf_int = st->hpf_tbl[hpf_idx][0];
*hpf_frac = st->hpf_tbl[hpf_idx][1];
return 0;
}
static int adxl380_set_hpf(struct adxl380_state *st, u8 hpf)
{
int ret;
u8 hpf_path = 0;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
if (hpf)
hpf_path = 1;
ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
ADXL380_FILTER_HPF_PATH_MSK,
FIELD_PREP(ADXL380_FILTER_HPF_PATH_MSK, hpf_path));
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, ADXL380_FILTER_REG,
ADXL380_FILTER_HPF_CORNER_MSK,
FIELD_PREP(ADXL380_FILTER_HPF_CORNER_MSK, hpf));
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int _adxl380_set_act_inact_time_ms(struct adxl380_state *st,
enum adxl380_activity_type act,
u32 ms)
{
u8 reg = adxl380_time_reg_high_addr[act];
unsigned int reg_val;
int ret;
/* 500us per code is the scale factor of TIME_ACT / TIME_INACT registers */
reg_val = min(DIV_ROUND_CLOSEST(ms * 1000, 500), ADXL380_TIME_MAX);
put_unaligned_be24(reg_val, &st->transf_buf[0]);
ret = regmap_bulk_write(st->regmap, reg, st->transf_buf, sizeof(st->transf_buf));
if (ret)
return ret;
if (act == ADXL380_ACTIVITY)
st->act_time_ms = ms;
else
st->inact_time_ms = ms;
return 0;
}
static int adxl380_set_act_inact_time_ms(struct adxl380_state *st,
enum adxl380_activity_type act,
u32 ms)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = _adxl380_set_act_inact_time_ms(st, act, ms);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_set_range(struct adxl380_state *st, u8 range)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, ADXL380_OP_MODE_REG,
ADXL380_OP_MODE_RANGE_MSK,
FIELD_PREP(ADXL380_OP_MODE_RANGE_MSK, range));
if (ret)
return ret;
adxl380_scale_act_inact_thresholds(st, st->range, range);
/* Activity thresholds depend on range */
ret = adxl380_write_act_inact_threshold(st, ADXL380_ACTIVITY,
st->act_threshold);
if (ret)
return ret;
ret = adxl380_write_act_inact_threshold(st, ADXL380_INACTIVITY,
st->inact_threshold);
if (ret)
return ret;
st->range = range;
return adxl380_set_measure_en(st, true);
}
static int adxl380_write_act_inact_en(struct adxl380_state *st,
enum adxl380_activity_type type,
bool en)
{
if (type == ADXL380_ACTIVITY)
return regmap_update_bits(st->regmap, ADXL380_ACT_INACT_CTL_REG,
ADXL380_ACT_EN_MSK,
FIELD_PREP(ADXL380_ACT_EN_MSK, en));
return regmap_update_bits(st->regmap, ADXL380_ACT_INACT_CTL_REG,
ADXL380_INACT_EN_MSK,
FIELD_PREP(ADXL380_INACT_EN_MSK, en));
}
static int adxl380_read_act_inact_int(struct adxl380_state *st,
enum adxl380_activity_type type,
bool *en)
{
int ret;
unsigned int reg_val;
guard(mutex)(&st->lock);
ret = regmap_read(st->regmap, st->int_map[0], ®_val);
if (ret)
return ret;
if (type == ADXL380_ACTIVITY)
*en = FIELD_GET(ADXL380_INT_MAP0_ACT_INT0_MSK, reg_val);
else
*en = FIELD_GET(ADXL380_INT_MAP0_INACT_INT0_MSK, reg_val);
return 0;
}
static int adxl380_write_act_inact_int(struct adxl380_state *st,
enum adxl380_activity_type act,
bool en)
{
if (act == ADXL380_ACTIVITY)
return regmap_update_bits(st->regmap, st->int_map[0],
ADXL380_INT_MAP0_ACT_INT0_MSK,
FIELD_PREP(ADXL380_INT_MAP0_ACT_INT0_MSK, en));
return regmap_update_bits(st->regmap, st->int_map[0],
ADXL380_INT_MAP0_INACT_INT0_MSK,
FIELD_PREP(ADXL380_INT_MAP0_INACT_INT0_MSK, en));
}
static int adxl380_act_inact_config(struct adxl380_state *st,
enum adxl380_activity_type type,
bool en)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = adxl380_write_act_inact_en(st, type, en);
if (ret)
return ret;
ret = adxl380_write_act_inact_int(st, type, en);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_write_tap_axis(struct adxl380_state *st,
enum adxl380_axis axis)
{
int ret;
ret = regmap_update_bits(st->regmap, ADXL380_TAP_CFG_REG,
ADXL380_TAP_AXIS_MSK,
FIELD_PREP(ADXL380_TAP_AXIS_MSK, axis));
if (ret)
return ret;
st->tap_axis_en = axis;
return 0;
}
static int adxl380_read_tap_int(struct adxl380_state *st, enum adxl380_tap_type type, bool *en)
{
int ret;
unsigned int reg_val;
ret = regmap_read(st->regmap, st->int_map[1], ®_val);
if (ret)
return ret;
if (type == ADXL380_SINGLE_TAP)
*en = FIELD_GET(ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK, reg_val);
else
*en = FIELD_GET(ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK, reg_val);
return 0;
}
static int adxl380_write_tap_int(struct adxl380_state *st, enum adxl380_tap_type type, bool en)
{
if (type == ADXL380_SINGLE_TAP)
return regmap_update_bits(st->regmap, st->int_map[1],
ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK,
FIELD_PREP(ADXL380_INT_MAP1_SINGLE_TAP_INT0_MSK, en));
return regmap_update_bits(st->regmap, st->int_map[1],
ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK,
FIELD_PREP(ADXL380_INT_MAP1_DOUBLE_TAP_INT0_MSK, en));
}
static int adxl380_tap_config(struct adxl380_state *st,
enum adxl380_axis axis,
enum adxl380_tap_type type,
bool en)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = adxl380_write_tap_axis(st, axis);
if (ret)
return ret;
ret = adxl380_write_tap_int(st, type, en);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_set_fifo_samples(struct adxl380_state *st)
{
int ret;
u16 fifo_samples = st->watermark * st->fifo_set_size;
ret = regmap_update_bits(st->regmap, ADXL380_FIFO_CONFIG_0_REG,
ADXL380_FIFO_SAMPLES_8_MSK,
FIELD_PREP(ADXL380_FIFO_SAMPLES_8_MSK,
(fifo_samples & BIT(8))));
if (ret)
return ret;
return regmap_write(st->regmap, ADXL380_FIFO_CONFIG_1_REG,
fifo_samples & 0xFF);
}
static int adxl380_get_status(struct adxl380_state *st, u8 *status0, u8 *status1)
{
int ret;
/* STATUS0, STATUS1 are adjacent regs */
ret = regmap_bulk_read(st->regmap, ADXL380_STATUS_0_REG,
&st->transf_buf, 2);
if (ret)
return ret;
*status0 = st->transf_buf[0];
*status1 = st->transf_buf[1];
return 0;
}
static int adxl380_get_fifo_entries(struct adxl380_state *st, u16 *fifo_entries)
{
int ret;
ret = regmap_bulk_read(st->regmap, ADXL380_FIFO_STATUS_0_REG,
&st->transf_buf, 2);
if (ret)
return ret;
*fifo_entries = st->transf_buf[0] | ((BIT(0) & st->transf_buf[1]) << 8);
return 0;
}
static void adxl380_push_event(struct iio_dev *indio_dev, s64 timestamp,
u8 status1)
{
if (FIELD_GET(ADXL380_STATUS_1_ACT_MSK, status1))
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
IIO_EV_TYPE_THRESH, IIO_EV_DIR_RISING),
timestamp);
if (FIELD_GET(ADXL380_STATUS_1_INACT_MSK, status1))
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
IIO_EV_TYPE_THRESH, IIO_EV_DIR_FALLING),
timestamp);
if (FIELD_GET(ADXL380_STATUS_1_SINGLE_TAP_MSK, status1))
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
IIO_EV_TYPE_GESTURE, IIO_EV_DIR_SINGLETAP),
timestamp);
if (FIELD_GET(ADXL380_STATUS_1_DOUBLE_TAP_MSK, status1))
iio_push_event(indio_dev,
IIO_MOD_EVENT_CODE(IIO_ACCEL, 0, IIO_MOD_X_OR_Y_OR_Z,
IIO_EV_TYPE_GESTURE, IIO_EV_DIR_DOUBLETAP),
timestamp);
}
static irqreturn_t adxl380_irq_handler(int irq, void *p)
{
struct iio_dev *indio_dev = p;
struct adxl380_state *st = iio_priv(indio_dev);
u8 status0, status1;
u16 fifo_entries;
int i;
int ret;
guard(mutex)(&st->lock);
ret = adxl380_get_status(st, &status0, &status1);
if (ret)
return IRQ_HANDLED;
adxl380_push_event(indio_dev, iio_get_time_ns(indio_dev), status1);
if (!FIELD_GET(ADXL380_STATUS_0_FIFO_WM_MSK, status0))
return IRQ_HANDLED;
ret = adxl380_get_fifo_entries(st, &fifo_entries);
if (ret)
return IRQ_HANDLED;
for (i = 0; i < fifo_entries; i += st->fifo_set_size) {
ret = regmap_noinc_read(st->regmap, ADXL380_FIFO_DATA,
&st->fifo_buf[i],
2 * st->fifo_set_size);
if (ret)
return IRQ_HANDLED;
iio_push_to_buffers(indio_dev, &st->fifo_buf[i]);
}
return IRQ_HANDLED;
}
static int adxl380_write_calibbias_value(struct adxl380_state *st,
unsigned long chan_addr,
s8 calibbias)
{
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_write(st->regmap, ADXL380_X_DSM_OFFSET_REG + chan_addr, calibbias);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_read_calibbias_value(struct adxl380_state *st,
unsigned long chan_addr,
int *calibbias)
{
int ret;
unsigned int reg_val;
guard(mutex)(&st->lock);
ret = regmap_read(st->regmap, ADXL380_X_DSM_OFFSET_REG + chan_addr, ®_val);
if (ret)
return ret;
*calibbias = sign_extend32(reg_val, 7);
return 0;
}
static ssize_t hwfifo_watermark_min_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "1\n");
}
static ssize_t hwfifo_watermark_max_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
return sysfs_emit(buf, "%lu\n", ADXL380_FIFO_SAMPLES);
}
static ssize_t adxl380_get_fifo_watermark(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct adxl380_state *st = iio_priv(indio_dev);
return sysfs_emit(buf, "%d\n", st->watermark);
}
static ssize_t adxl380_get_fifo_enabled(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct adxl380_state *st = iio_priv(indio_dev);
int ret;
unsigned int reg_val;
ret = regmap_read(st->regmap, ADXL380_DIG_EN_REG, ®_val);
if (ret)
return ret;
return sysfs_emit(buf, "%lu\n",
FIELD_GET(ADXL380_FIFO_EN_MSK, reg_val));
}
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_min, 0);
static IIO_DEVICE_ATTR_RO(hwfifo_watermark_max, 0);
static IIO_DEVICE_ATTR(hwfifo_watermark, 0444,
adxl380_get_fifo_watermark, NULL, 0);
static IIO_DEVICE_ATTR(hwfifo_enabled, 0444,
adxl380_get_fifo_enabled, NULL, 0);
static const struct iio_dev_attr *adxl380_fifo_attributes[] = {
&iio_dev_attr_hwfifo_watermark_min,
&iio_dev_attr_hwfifo_watermark_max,
&iio_dev_attr_hwfifo_watermark,
&iio_dev_attr_hwfifo_enabled,
NULL
};
static int adxl380_buffer_postenable(struct iio_dev *indio_dev)
{
struct adxl380_state *st = iio_priv(indio_dev);
int i;
int ret;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_update_bits(st->regmap,
st->int_map[0],
ADXL380_INT_MAP0_FIFO_WM_INT0_MSK,
FIELD_PREP(ADXL380_INT_MAP0_FIFO_WM_INT0_MSK, 1));
if (ret)
return ret;
for_each_clear_bit(i, indio_dev->active_scan_mask, ADXL380_CH_NUM) {
ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG,
ADXL380_CHAN_EN_MSK(i),
0 << (4 + i));
if (ret)
return ret;
}
st->fifo_set_size = bitmap_weight(indio_dev->active_scan_mask,
iio_get_masklength(indio_dev));
if ((st->watermark * st->fifo_set_size) > ADXL380_FIFO_SAMPLES)
st->watermark = (ADXL380_FIFO_SAMPLES / st->fifo_set_size);
ret = adxl380_set_fifo_samples(st);
if (ret)
return ret;
ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG, ADXL380_FIFO_EN_MSK,
FIELD_PREP(ADXL380_FIFO_EN_MSK, 1));
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static int adxl380_buffer_predisable(struct iio_dev *indio_dev)
{
struct adxl380_state *st = iio_priv(indio_dev);
int ret, i;
guard(mutex)(&st->lock);
ret = adxl380_set_measure_en(st, false);
if (ret)
return ret;
ret = regmap_update_bits(st->regmap,
st->int_map[0],
ADXL380_INT_MAP0_FIFO_WM_INT0_MSK,
FIELD_PREP(ADXL380_INT_MAP0_FIFO_WM_INT0_MSK, 0));
if (ret)
return ret;
for (i = 0; i < indio_dev->num_channels; i++) {
ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG,
ADXL380_CHAN_EN_MSK(i),
1 << (4 + i));
if (ret)
return ret;
}
ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG, ADXL380_FIFO_EN_MSK,
FIELD_PREP(ADXL380_FIFO_EN_MSK, 0));
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
static const struct iio_buffer_setup_ops adxl380_buffer_ops = {
.postenable = adxl380_buffer_postenable,
.predisable = adxl380_buffer_predisable,
};
static int adxl380_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val, int *val2, long info)
{
struct adxl380_state *st = iio_priv(indio_dev);
int ret;
switch (info) {
case IIO_CHAN_INFO_RAW:
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
ret = adxl380_read_chn(st, chan->address);
iio_device_release_direct_mode(indio_dev);
if (ret)
return ret;
*val = sign_extend32(ret >> chan->scan_type.shift,
chan->scan_type.realbits - 1);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
switch (chan->type) {
case IIO_ACCEL:
scoped_guard(mutex, &st->lock) {
*val = st->chip_info->scale_tbl[st->range][0];
*val2 = st->chip_info->scale_tbl[st->range][1];
}
return IIO_VAL_INT_PLUS_NANO;
case IIO_TEMP:
/* 10.2 LSB / Degree Celsius */
*val = 10000;
*val2 = 102;
return IIO_VAL_FRACTIONAL;
default:
return -EINVAL;
}
case IIO_CHAN_INFO_OFFSET:
switch (chan->type) {
case IIO_TEMP:
*val = st->chip_info->temp_offset;
return IIO_VAL_INT;
default:
return -EINVAL;
}
case IIO_CHAN_INFO_CALIBBIAS:
switch (chan->type) {
case IIO_ACCEL:
ret = adxl380_read_calibbias_value(st, chan->scan_index, val);
if (ret)
return ret;
return IIO_VAL_INT;
default:
return -EINVAL;
}
case IIO_CHAN_INFO_SAMP_FREQ:
ret = adxl380_get_odr(st, val);
if (ret)
return ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
ret = adxl380_get_lpf(st, val);
if (ret)
return ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
ret = adxl380_get_hpf(st, val, val2);
if (ret)
return ret;
return IIO_VAL_INT_PLUS_MICRO;
}
return -EINVAL;
}
static int adxl380_read_avail(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
const int **vals, int *type, int *length,
long mask)
{
struct adxl380_state *st = iio_priv(indio_dev);
if (chan->type != IIO_ACCEL)
return -EINVAL;
switch (mask) {
case IIO_CHAN_INFO_SCALE:
*vals = (const int *)st->chip_info->scale_tbl;
*type = IIO_VAL_INT_PLUS_NANO;
*length = ARRAY_SIZE(st->chip_info->scale_tbl) * 2;
return IIO_AVAIL_LIST;
case IIO_CHAN_INFO_SAMP_FREQ:
*vals = (const int *)st->chip_info->samp_freq_tbl;
*type = IIO_VAL_INT;
*length = ARRAY_SIZE(st->chip_info->samp_freq_tbl);
return IIO_AVAIL_LIST;
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
*vals = (const int *)st->lpf_tbl;
*type = IIO_VAL_INT;
*length = ARRAY_SIZE(st->lpf_tbl);
return IIO_AVAIL_LIST;
case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
*vals = (const int *)st->hpf_tbl;
*type = IIO_VAL_INT_PLUS_MICRO;
/* Values are stored in a 2D matrix */
*length = ARRAY_SIZE(st->hpf_tbl) * 2;
return IIO_AVAIL_LIST;
default:
return -EINVAL;
}
}
static int adxl380_write_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int val, int val2, long info)
{
struct adxl380_state *st = iio_priv(indio_dev);
int odr_index, lpf_index, hpf_index, range_index;
switch (info) {
case IIO_CHAN_INFO_SAMP_FREQ:
odr_index = adxl380_find_match_1d_tbl(st->chip_info->samp_freq_tbl,
ARRAY_SIZE(st->chip_info->samp_freq_tbl),
val);
return adxl380_set_odr(st, odr_index);
case IIO_CHAN_INFO_CALIBBIAS:
return adxl380_write_calibbias_value(st, chan->scan_index, val);
case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
lpf_index = adxl380_find_match_1d_tbl(st->lpf_tbl,
ARRAY_SIZE(st->lpf_tbl),
val);
return adxl380_set_lpf(st, lpf_index);
case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY:
hpf_index = adxl380_find_match_2d_tbl(st->hpf_tbl,
ARRAY_SIZE(st->hpf_tbl),
val, val2);
if (hpf_index < 0)
return hpf_index;
return adxl380_set_hpf(st, hpf_index);
case IIO_CHAN_INFO_SCALE:
range_index = adxl380_find_match_2d_tbl(st->chip_info->scale_tbl,
ARRAY_SIZE(st->chip_info->scale_tbl),
val, val2);
if (range_index < 0)
return range_index;
return adxl380_set_range(st, range_index);
default:
return -EINVAL;
}
}
static int adxl380_write_raw_get_fmt(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
long info)
{
switch (info) {
case IIO_CHAN_INFO_SCALE:
if (chan->type != IIO_ACCEL)
return -EINVAL;
return IIO_VAL_INT_PLUS_NANO;
default:
return IIO_VAL_INT_PLUS_MICRO;
}
}
static int adxl380_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 adxl380_state *st = iio_priv(indio_dev);
int ret;
bool int_en;
bool tap_axis_en = false;
switch (chan->channel2) {
case IIO_MOD_X:
tap_axis_en = st->tap_axis_en == ADXL380_X_AXIS;
break;
case IIO_MOD_Y:
tap_axis_en = st->tap_axis_en == ADXL380_Y_AXIS;
break;
case IIO_MOD_Z:
tap_axis_en = st->tap_axis_en == ADXL380_Z_AXIS;
break;
default:
return -EINVAL;
}
switch (dir) {
case IIO_EV_DIR_RISING:
ret = adxl380_read_act_inact_int(st, ADXL380_ACTIVITY, &int_en);
if (ret)
return ret;
return int_en;
case IIO_EV_DIR_FALLING:
ret = adxl380_read_act_inact_int(st, ADXL380_INACTIVITY, &int_en);
if (ret)
return ret;
return int_en;
case IIO_EV_DIR_SINGLETAP:
ret = adxl380_read_tap_int(st, ADXL380_SINGLE_TAP, &int_en);
if (ret)
return ret;
return int_en && tap_axis_en;
case IIO_EV_DIR_DOUBLETAP:
ret = adxl380_read_tap_int(st, ADXL380_DOUBLE_TAP, &int_en);
if (ret)
return ret;
return int_en && tap_axis_en;
default:
return -EINVAL;
}
}
static int adxl380_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 adxl380_state *st = iio_priv(indio_dev);
enum adxl380_axis axis;
switch (chan->channel2) {
case IIO_MOD_X:
axis = ADXL380_X_AXIS;
break;
case IIO_MOD_Y:
axis = ADXL380_Y_AXIS;
break;
case IIO_MOD_Z:
axis = ADXL380_Z_AXIS;
break;
default:
return -EINVAL;
}
switch (dir) {
case IIO_EV_DIR_RISING:
return adxl380_act_inact_config(st, ADXL380_ACTIVITY, state);
case IIO_EV_DIR_FALLING:
return adxl380_act_inact_config(st, ADXL380_INACTIVITY, state);
case IIO_EV_DIR_SINGLETAP:
return adxl380_tap_config(st, axis, ADXL380_SINGLE_TAP, state);
case IIO_EV_DIR_DOUBLETAP:
return adxl380_tap_config(st, axis, ADXL380_DOUBLE_TAP, state);
default:
return -EINVAL;
}
}
static int adxl380_read_event_value(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 adxl380_state *st = iio_priv(indio_dev);
guard(mutex)(&st->lock);
switch (type) {
case IIO_EV_TYPE_THRESH:
switch (info) {
case IIO_EV_INFO_VALUE: {
switch (dir) {
case IIO_EV_DIR_RISING:
*val = st->act_threshold;
return IIO_VAL_INT;
case IIO_EV_DIR_FALLING:
*val = st->inact_threshold;
return IIO_VAL_INT;
default:
return -EINVAL;
}
}
case IIO_EV_INFO_PERIOD:
switch (dir) {
case IIO_EV_DIR_RISING:
*val = st->act_time_ms;
*val2 = 1000;
return IIO_VAL_FRACTIONAL;
case IIO_EV_DIR_FALLING:
*val = st->inact_time_ms;
*val2 = 1000;
return IIO_VAL_FRACTIONAL;
default:
return -EINVAL;
}
default:
return -EINVAL;
}
case IIO_EV_TYPE_GESTURE:
switch (info) {
case IIO_EV_INFO_VALUE:
*val = st->tap_threshold;
return IIO_VAL_INT;
case IIO_EV_INFO_RESET_TIMEOUT:
*val = st->tap_window_us;
*val2 = 1000000;
return IIO_VAL_FRACTIONAL;
case IIO_EV_INFO_TAP2_MIN_DELAY:
*val = st->tap_latent_us;
*val2 = 1000000;
return IIO_VAL_FRACTIONAL;
default:
return -EINVAL;
}
default:
return -EINVAL;
}
}
static int adxl380_write_event_value(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 adxl380_state *st = iio_priv(indio_dev);
u32 val_ms, val_us;
if (chan->type != IIO_ACCEL)
return -EINVAL;
switch (type) {
case IIO_EV_TYPE_THRESH:
switch (info) {
case IIO_EV_INFO_VALUE:
switch (dir) {
case IIO_EV_DIR_RISING:
return adxl380_set_act_inact_threshold(indio_dev,
ADXL380_ACTIVITY, val);
case IIO_EV_DIR_FALLING:
return adxl380_set_act_inact_threshold(indio_dev,
ADXL380_INACTIVITY, val);
default:
return -EINVAL;
}
case IIO_EV_INFO_PERIOD:
val_ms = val * 1000 + DIV_ROUND_UP(val2, 1000);
switch (dir) {
case IIO_EV_DIR_RISING:
return adxl380_set_act_inact_time_ms(st,
ADXL380_ACTIVITY, val_ms);
case IIO_EV_DIR_FALLING:
return adxl380_set_act_inact_time_ms(st,
ADXL380_INACTIVITY, val_ms);
default:
return -EINVAL;
}
default:
return -EINVAL;
}
case IIO_EV_TYPE_GESTURE:
switch (info) {
case IIO_EV_INFO_VALUE:
return adxl380_set_tap_threshold_value(indio_dev, val);
case IIO_EV_INFO_RESET_TIMEOUT:
val_us = val * 1000000 + val2;
return adxl380_write_tap_time_us(st,
ADXL380_TAP_TIME_WINDOW,
val_us);
case IIO_EV_INFO_TAP2_MIN_DELAY:
val_us = val * 1000000 + val2;
return adxl380_write_tap_time_us(st,
ADXL380_TAP_TIME_LATENT,
val_us);
default:
return -EINVAL;
}
default:
return -EINVAL;
}
}
static ssize_t in_accel_gesture_tap_maxtomin_time_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
int vals[2];
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct adxl380_state *st = iio_priv(indio_dev);
guard(mutex)(&st->lock);
vals[0] = st->tap_duration_us;
vals[1] = MICRO;
return iio_format_value(buf, IIO_VAL_FRACTIONAL, 2, vals);
}
static ssize_t in_accel_gesture_tap_maxtomin_time_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t len)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct adxl380_state *st = iio_priv(indio_dev);
int ret, val_int, val_fract_us;
guard(mutex)(&st->lock);
ret = iio_str_to_fixpoint(buf, 100000, &val_int, &val_fract_us);
if (ret)
return ret;
/* maximum value is 255 * 625 us = 0.159375 seconds */
if (val_int || val_fract_us > 159375 || val_fract_us < 0)
return -EINVAL;
ret = adxl380_write_tap_dur_us(indio_dev, val_fract_us);
if (ret)
return ret;
return len;
}
static IIO_DEVICE_ATTR_RW(in_accel_gesture_tap_maxtomin_time, 0);
static struct attribute *adxl380_event_attributes[] = {
&iio_dev_attr_in_accel_gesture_tap_maxtomin_time.dev_attr.attr,
NULL
};
static const struct attribute_group adxl380_event_attribute_group = {
.attrs = adxl380_event_attributes,
};
static int adxl380_reg_access(struct iio_dev *indio_dev,
unsigned int reg,
unsigned int writeval,
unsigned int *readval)
{
struct adxl380_state *st = iio_priv(indio_dev);
if (readval)
return regmap_read(st->regmap, reg, readval);
return regmap_write(st->regmap, reg, writeval);
}
static int adxl380_set_watermark(struct iio_dev *indio_dev, unsigned int val)
{
struct adxl380_state *st = iio_priv(indio_dev);
st->watermark = min(val, ADXL380_FIFO_SAMPLES);
return 0;
}
static const struct iio_info adxl380_info = {
.read_raw = adxl380_read_raw,
.read_avail = &adxl380_read_avail,
.write_raw = adxl380_write_raw,
.write_raw_get_fmt = adxl380_write_raw_get_fmt,
.read_event_config = adxl380_read_event_config,
.write_event_config = adxl380_write_event_config,
.read_event_value = adxl380_read_event_value,
.write_event_value = adxl380_write_event_value,
.event_attrs = &adxl380_event_attribute_group,
.debugfs_reg_access = &adxl380_reg_access,
.hwfifo_set_watermark = adxl380_set_watermark,
};
static const struct iio_event_spec adxl380_events[] = {
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_RISING,
.mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_PERIOD),
},
{
.type = IIO_EV_TYPE_THRESH,
.dir = IIO_EV_DIR_FALLING,
.mask_shared_by_type = BIT(IIO_EV_INFO_ENABLE) |
BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_PERIOD),
},
{
.type = IIO_EV_TYPE_GESTURE,
.dir = IIO_EV_DIR_SINGLETAP,
.mask_separate = BIT(IIO_EV_INFO_ENABLE),
.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_RESET_TIMEOUT),
},
{
.type = IIO_EV_TYPE_GESTURE,
.dir = IIO_EV_DIR_DOUBLETAP,
.mask_separate = BIT(IIO_EV_INFO_ENABLE),
.mask_shared_by_type = BIT(IIO_EV_INFO_VALUE) |
BIT(IIO_EV_INFO_RESET_TIMEOUT) |
BIT(IIO_EV_INFO_TAP2_MIN_DELAY),
},
};
#define ADXL380_ACCEL_CHANNEL(index, reg, axis) { \
.type = IIO_ACCEL, \
.address = reg, \
.modified = 1, \
.channel2 = IIO_MOD_##axis, \
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
BIT(IIO_CHAN_INFO_CALIBBIAS), \
.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ), \
.info_mask_shared_by_all_available = \
BIT(IIO_CHAN_INFO_SAMP_FREQ), \
.info_mask_shared_by_type = \
BIT(IIO_CHAN_INFO_SCALE) | \
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \
.info_mask_shared_by_type_available = \
BIT(IIO_CHAN_INFO_SCALE) | \
BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \
BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \
.scan_index = index, \
.scan_type = { \
.sign = 's', \
.realbits = 16, \
.storagebits = 16, \
.endianness = IIO_BE, \
}, \
.event_spec = adxl380_events, \
.num_event_specs = ARRAY_SIZE(adxl380_events) \
}
static const struct iio_chan_spec adxl380_channels[] = {
ADXL380_ACCEL_CHANNEL(0, ADXL380_X_DATA_H_REG, X),
ADXL380_ACCEL_CHANNEL(1, ADXL380_Y_DATA_H_REG, Y),
ADXL380_ACCEL_CHANNEL(2, ADXL380_Z_DATA_H_REG, Z),
{
.type = IIO_TEMP,
.address = ADXL380_T_DATA_H_REG,
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
BIT(IIO_CHAN_INFO_SCALE) |
BIT(IIO_CHAN_INFO_OFFSET),
.scan_index = 3,
.scan_type = {
.sign = 's',
.realbits = 12,
.storagebits = 16,
.shift = 4,
.endianness = IIO_BE,
},
},
};
static int adxl380_config_irq(struct iio_dev *indio_dev)
{
struct adxl380_state *st = iio_priv(indio_dev);
unsigned long irq_flag;
struct irq_data *desc;
u32 irq_type;
u8 polarity;
int ret;
st->irq = fwnode_irq_get_byname(dev_fwnode(st->dev), "INT0");
if (st->irq > 0) {
st->int_map[0] = ADXL380_INT0_MAP0_REG;
st->int_map[1] = ADXL380_INT0_MAP1_REG;
} else {
st->irq = fwnode_irq_get_byname(dev_fwnode(st->dev), "INT1");
if (st->irq > 0)
return dev_err_probe(st->dev, -ENODEV,
"no interrupt name specified");
st->int_map[0] = ADXL380_INT1_MAP0_REG;
st->int_map[1] = ADXL380_INT1_MAP1_REG;
}
desc = irq_get_irq_data(st->irq);
if (!desc)
return dev_err_probe(st->dev, -EINVAL, "Could not find IRQ %d\n", st->irq);
irq_type = irqd_get_trigger_type(desc);
if (irq_type == IRQ_TYPE_LEVEL_HIGH) {
polarity = 0;
irq_flag = IRQF_TRIGGER_HIGH | IRQF_ONESHOT;
} else if (irq_type == IRQ_TYPE_LEVEL_LOW) {
polarity = 1;
irq_flag = IRQF_TRIGGER_LOW | IRQF_ONESHOT;
} else {
return dev_err_probe(st->dev, -EINVAL,
"Invalid interrupt 0x%x. Only level interrupts supported\n",
irq_type);
}
ret = regmap_update_bits(st->regmap, ADXL380_INT0_REG,
ADXL380_INT0_POL_MSK,
FIELD_PREP(ADXL380_INT0_POL_MSK, polarity));
if (ret)
return ret;
return devm_request_threaded_irq(st->dev, st->irq, NULL,
adxl380_irq_handler, irq_flag,
indio_dev->name, indio_dev);
}
static int adxl380_setup(struct iio_dev *indio_dev)
{
unsigned int reg_val;
u16 part_id, chip_id;
int ret, i;
struct adxl380_state *st = iio_priv(indio_dev);
ret = regmap_read(st->regmap, ADXL380_DEVID_AD_REG, ®_val);
if (ret)
return ret;
if (reg_val != ADXL380_DEVID_AD_VAL)
dev_warn(st->dev, "Unknown chip id %x\n", reg_val);
ret = regmap_bulk_read(st->regmap, ADLX380_PART_ID_REG,
&st->transf_buf, 2);
if (ret)
return ret;
part_id = get_unaligned_be16(st->transf_buf);
part_id >>= 4;
if (part_id != ADXL380_ID_VAL)
dev_warn(st->dev, "Unknown part id %x\n", part_id);
ret = regmap_read(st->regmap, ADXL380_MISC_0_REG, ®_val);
if (ret)
return ret;
/* Bit to differentiate between ADXL380/382. */
if (reg_val & ADXL380_XL382_MSK)
chip_id = ADXL382_ID_VAL;
else
chip_id = ADXL380_ID_VAL;
if (chip_id != st->chip_info->chip_id)
dev_warn(st->dev, "Unknown chip id %x\n", chip_id);
ret = regmap_write(st->regmap, ADXL380_RESET_REG, ADXL380_RESET_CODE);
if (ret)
return ret;
/*
* A latency of approximately 0.5 ms is required after soft reset.
* Stated in the register REG_RESET description.
*/
fsleep(500);
for (i = 0; i < indio_dev->num_channels; i++) {
ret = regmap_update_bits(st->regmap, ADXL380_DIG_EN_REG,
ADXL380_CHAN_EN_MSK(i),
1 << (4 + i));
if (ret)
return ret;
}
ret = regmap_update_bits(st->regmap, ADXL380_FIFO_CONFIG_0_REG,
ADXL380_FIFO_MODE_MSK,
FIELD_PREP(ADXL380_FIFO_MODE_MSK, ADXL380_FIFO_STREAMED));
if (ret)
return ret;
/* Select all 3 axis for act/inact detection. */
ret = regmap_update_bits(st->regmap, ADXL380_SNSR_AXIS_EN_REG,
ADXL380_ACT_INACT_AXIS_EN_MSK,
FIELD_PREP(ADXL380_ACT_INACT_AXIS_EN_MSK,
ADXL380_ACT_INACT_AXIS_EN_MSK));
if (ret)
return ret;
ret = adxl380_config_irq(indio_dev);
if (ret)
return ret;
ret = adxl380_fill_lpf_tbl(st);
if (ret)
return ret;
ret = adxl380_fill_hpf_tbl(st);
if (ret)
return ret;
return adxl380_set_measure_en(st, true);
}
int adxl380_probe(struct device *dev, struct regmap *regmap,
const struct adxl380_chip_info *chip_info)
{
struct iio_dev *indio_dev;
struct adxl380_state *st;
int ret;
indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
if (!indio_dev)
return -ENOMEM;
st = iio_priv(indio_dev);
st->dev = dev;
st->regmap = regmap;
st->chip_info = chip_info;
mutex_init(&st->lock);
indio_dev->channels = adxl380_channels;
indio_dev->num_channels = ARRAY_SIZE(adxl380_channels);
indio_dev->name = chip_info->name;
indio_dev->info = &adxl380_info;
indio_dev->modes = INDIO_DIRECT_MODE;
ret = devm_regulator_get_enable(dev, "vddio");
if (ret)
return dev_err_probe(st->dev, ret,
"Failed to get vddio regulator\n");
ret = devm_regulator_get_enable(st->dev, "vsupply");
if (ret)
return dev_err_probe(st->dev, ret,
"Failed to get vsupply regulator\n");
ret = adxl380_setup(indio_dev);
if (ret)
return ret;
ret = devm_iio_kfifo_buffer_setup_ext(st->dev, indio_dev,
&adxl380_buffer_ops,
adxl380_fifo_attributes);
if (ret)
return ret;
return devm_iio_device_register(dev, indio_dev);
}
EXPORT_SYMBOL_NS_GPL(adxl380_probe, IIO_ADXL380);
MODULE_AUTHOR("Ramona Gradinariu <[email protected]>");
MODULE_AUTHOR("Antoniu Miclaus <[email protected]>");
MODULE_DESCRIPTION("Analog Devices ADXL380 3-axis accelerometer driver");
MODULE_LICENSE("GPL");
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