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707 lines
17 KiB
707 lines
17 KiB
// SPDX-License-Identifier: GPL-2.0-or-later |
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/* |
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* ADXRS290 SPI Gyroscope Driver |
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* |
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* Copyright (C) 2020 Nishant Malpani <[email protected]> |
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* Copyright (C) 2020 Analog Devices, Inc. |
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*/ |
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#include <linux/bitfield.h> |
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#include <linux/delay.h> |
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#include <linux/device.h> |
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#include <linux/kernel.h> |
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#include <linux/module.h> |
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#include <linux/spi/spi.h> |
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#include <linux/iio/buffer.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/trigger.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 ADXRS290_ADI_ID 0xAD |
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#define ADXRS290_MEMS_ID 0x1D |
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#define ADXRS290_DEV_ID 0x92 |
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#define ADXRS290_REG_ADI_ID 0x00 |
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#define ADXRS290_REG_MEMS_ID 0x01 |
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#define ADXRS290_REG_DEV_ID 0x02 |
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#define ADXRS290_REG_REV_ID 0x03 |
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#define ADXRS290_REG_SN0 0x04 /* Serial Number Registers, 4 bytes */ |
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#define ADXRS290_REG_DATAX0 0x08 /* Roll Rate o/p Data Regs, 2 bytes */ |
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#define ADXRS290_REG_DATAY0 0x0A /* Pitch Rate o/p Data Regs, 2 bytes */ |
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#define ADXRS290_REG_TEMP0 0x0C |
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#define ADXRS290_REG_POWER_CTL 0x10 |
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#define ADXRS290_REG_FILTER 0x11 |
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#define ADXRS290_REG_DATA_RDY 0x12 |
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#define ADXRS290_READ BIT(7) |
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#define ADXRS290_TSM BIT(0) |
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#define ADXRS290_MEASUREMENT BIT(1) |
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#define ADXRS290_DATA_RDY_OUT BIT(0) |
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#define ADXRS290_SYNC_MASK GENMASK(1, 0) |
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#define ADXRS290_SYNC(x) FIELD_PREP(ADXRS290_SYNC_MASK, x) |
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#define ADXRS290_LPF_MASK GENMASK(2, 0) |
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#define ADXRS290_LPF(x) FIELD_PREP(ADXRS290_LPF_MASK, x) |
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#define ADXRS290_HPF_MASK GENMASK(7, 4) |
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#define ADXRS290_HPF(x) FIELD_PREP(ADXRS290_HPF_MASK, x) |
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#define ADXRS290_READ_REG(reg) (ADXRS290_READ | (reg)) |
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#define ADXRS290_MAX_TRANSITION_TIME_MS 100 |
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enum adxrs290_mode { |
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ADXRS290_MODE_STANDBY, |
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ADXRS290_MODE_MEASUREMENT, |
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}; |
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enum adxrs290_scan_index { |
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ADXRS290_IDX_X, |
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ADXRS290_IDX_Y, |
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ADXRS290_IDX_TEMP, |
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ADXRS290_IDX_TS, |
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}; |
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struct adxrs290_state { |
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struct spi_device *spi; |
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/* Serialize reads and their subsequent processing */ |
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struct mutex lock; |
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enum adxrs290_mode mode; |
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unsigned int lpf_3db_freq_idx; |
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unsigned int hpf_3db_freq_idx; |
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struct iio_trigger *dready_trig; |
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/* Ensure correct alignment of timestamp when present */ |
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struct { |
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s16 channels[3]; |
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s64 ts __aligned(8); |
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} buffer; |
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}; |
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/* |
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* Available cut-off frequencies of the low pass filter in Hz. |
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* The integer part and fractional part are represented separately. |
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*/ |
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static const int adxrs290_lpf_3db_freq_hz_table[][2] = { |
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[0] = {480, 0}, |
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[1] = {320, 0}, |
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[2] = {160, 0}, |
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[3] = {80, 0}, |
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[4] = {56, 600000}, |
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[5] = {40, 0}, |
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[6] = {28, 300000}, |
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[7] = {20, 0}, |
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}; |
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/* |
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* Available cut-off frequencies of the high pass filter in Hz. |
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* The integer part and fractional part are represented separately. |
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*/ |
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static const int adxrs290_hpf_3db_freq_hz_table[][2] = { |
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[0] = {0, 0}, |
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[1] = {0, 11000}, |
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[2] = {0, 22000}, |
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[3] = {0, 44000}, |
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[4] = {0, 87000}, |
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[5] = {0, 175000}, |
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[6] = {0, 350000}, |
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[7] = {0, 700000}, |
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[8] = {1, 400000}, |
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[9] = {2, 800000}, |
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[10] = {11, 300000}, |
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}; |
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static int adxrs290_get_rate_data(struct iio_dev *indio_dev, const u8 cmd, int *val) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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int ret = 0; |
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int temp; |
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mutex_lock(&st->lock); |
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temp = spi_w8r16(st->spi, cmd); |
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if (temp < 0) { |
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ret = temp; |
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goto err_unlock; |
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} |
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*val = temp; |
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err_unlock: |
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mutex_unlock(&st->lock); |
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return ret; |
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} |
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static int adxrs290_get_temp_data(struct iio_dev *indio_dev, int *val) |
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{ |
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const u8 cmd = ADXRS290_READ_REG(ADXRS290_REG_TEMP0); |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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int ret = 0; |
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int temp; |
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mutex_lock(&st->lock); |
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temp = spi_w8r16(st->spi, cmd); |
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if (temp < 0) { |
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ret = temp; |
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goto err_unlock; |
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} |
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/* extract lower 12 bits temperature reading */ |
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*val = temp & 0x0FFF; |
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err_unlock: |
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mutex_unlock(&st->lock); |
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return ret; |
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} |
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static int adxrs290_get_3db_freq(struct iio_dev *indio_dev, u8 *val, u8 *val2) |
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{ |
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const u8 cmd = ADXRS290_READ_REG(ADXRS290_REG_FILTER); |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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int ret = 0; |
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short temp; |
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mutex_lock(&st->lock); |
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temp = spi_w8r8(st->spi, cmd); |
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if (temp < 0) { |
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ret = temp; |
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goto err_unlock; |
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} |
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*val = FIELD_GET(ADXRS290_LPF_MASK, temp); |
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*val2 = FIELD_GET(ADXRS290_HPF_MASK, temp); |
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err_unlock: |
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mutex_unlock(&st->lock); |
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return ret; |
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} |
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static int adxrs290_spi_write_reg(struct spi_device *spi, const u8 reg, |
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const u8 val) |
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{ |
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u8 buf[2]; |
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buf[0] = reg; |
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buf[1] = val; |
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return spi_write_then_read(spi, buf, ARRAY_SIZE(buf), NULL, 0); |
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} |
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static int adxrs290_find_match(const int (*freq_tbl)[2], const int n, |
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const int val, const int val2) |
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{ |
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int i; |
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for (i = 0; i < n; i++) { |
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if (freq_tbl[i][0] == val && freq_tbl[i][1] == val2) |
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return i; |
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} |
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return -EINVAL; |
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} |
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static int adxrs290_set_filter_freq(struct iio_dev *indio_dev, |
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const unsigned int lpf_idx, |
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const unsigned int hpf_idx) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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u8 val; |
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val = ADXRS290_HPF(hpf_idx) | ADXRS290_LPF(lpf_idx); |
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return adxrs290_spi_write_reg(st->spi, ADXRS290_REG_FILTER, val); |
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} |
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static int adxrs290_set_mode(struct iio_dev *indio_dev, enum adxrs290_mode mode) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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int val, ret; |
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if (st->mode == mode) |
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return 0; |
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mutex_lock(&st->lock); |
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ret = spi_w8r8(st->spi, ADXRS290_READ_REG(ADXRS290_REG_POWER_CTL)); |
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if (ret < 0) |
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goto out_unlock; |
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val = ret; |
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switch (mode) { |
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case ADXRS290_MODE_STANDBY: |
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val &= ~ADXRS290_MEASUREMENT; |
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break; |
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case ADXRS290_MODE_MEASUREMENT: |
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val |= ADXRS290_MEASUREMENT; |
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break; |
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default: |
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ret = -EINVAL; |
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goto out_unlock; |
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} |
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ret = adxrs290_spi_write_reg(st->spi, ADXRS290_REG_POWER_CTL, val); |
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if (ret < 0) { |
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dev_err(&st->spi->dev, "unable to set mode: %d\n", ret); |
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goto out_unlock; |
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} |
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/* update cached mode */ |
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st->mode = mode; |
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out_unlock: |
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mutex_unlock(&st->lock); |
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return ret; |
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} |
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static void adxrs290_chip_off_action(void *data) |
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{ |
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struct iio_dev *indio_dev = data; |
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adxrs290_set_mode(indio_dev, ADXRS290_MODE_STANDBY); |
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} |
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static int adxrs290_initial_setup(struct iio_dev *indio_dev) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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struct spi_device *spi = st->spi; |
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int ret; |
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ret = adxrs290_spi_write_reg(spi, ADXRS290_REG_POWER_CTL, |
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ADXRS290_MEASUREMENT | ADXRS290_TSM); |
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if (ret < 0) |
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return ret; |
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st->mode = ADXRS290_MODE_MEASUREMENT; |
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return devm_add_action_or_reset(&spi->dev, adxrs290_chip_off_action, |
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indio_dev); |
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} |
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static int adxrs290_read_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int *val, |
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int *val2, |
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long mask) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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unsigned int t; |
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int ret; |
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switch (mask) { |
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case IIO_CHAN_INFO_RAW: |
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ret = iio_device_claim_direct_mode(indio_dev); |
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if (ret) |
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return ret; |
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switch (chan->type) { |
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case IIO_ANGL_VEL: |
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ret = adxrs290_get_rate_data(indio_dev, |
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ADXRS290_READ_REG(chan->address), |
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val); |
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if (ret < 0) |
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break; |
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ret = IIO_VAL_INT; |
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break; |
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case IIO_TEMP: |
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ret = adxrs290_get_temp_data(indio_dev, val); |
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if (ret < 0) |
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break; |
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ret = IIO_VAL_INT; |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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iio_device_release_direct_mode(indio_dev); |
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return ret; |
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case IIO_CHAN_INFO_SCALE: |
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switch (chan->type) { |
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case IIO_ANGL_VEL: |
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/* 1 LSB = 0.005 degrees/sec */ |
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*val = 0; |
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*val2 = 87266; |
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return IIO_VAL_INT_PLUS_NANO; |
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case IIO_TEMP: |
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/* 1 LSB = 0.1 degrees Celsius */ |
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*val = 100; |
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return IIO_VAL_INT; |
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default: |
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return -EINVAL; |
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} |
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case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: |
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switch (chan->type) { |
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case IIO_ANGL_VEL: |
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t = st->lpf_3db_freq_idx; |
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*val = adxrs290_lpf_3db_freq_hz_table[t][0]; |
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*val2 = adxrs290_lpf_3db_freq_hz_table[t][1]; |
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return IIO_VAL_INT_PLUS_MICRO; |
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default: |
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return -EINVAL; |
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} |
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case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: |
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switch (chan->type) { |
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case IIO_ANGL_VEL: |
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t = st->hpf_3db_freq_idx; |
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*val = adxrs290_hpf_3db_freq_hz_table[t][0]; |
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*val2 = adxrs290_hpf_3db_freq_hz_table[t][1]; |
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return IIO_VAL_INT_PLUS_MICRO; |
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default: |
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return -EINVAL; |
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} |
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} |
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return -EINVAL; |
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} |
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static int adxrs290_write_raw(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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int val, |
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int val2, |
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long mask) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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int ret, lpf_idx, hpf_idx; |
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ret = iio_device_claim_direct_mode(indio_dev); |
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if (ret) |
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return ret; |
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switch (mask) { |
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case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: |
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lpf_idx = adxrs290_find_match(adxrs290_lpf_3db_freq_hz_table, |
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ARRAY_SIZE(adxrs290_lpf_3db_freq_hz_table), |
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val, val2); |
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if (lpf_idx < 0) { |
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ret = -EINVAL; |
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break; |
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} |
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/* caching the updated state of the low-pass filter */ |
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st->lpf_3db_freq_idx = lpf_idx; |
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/* retrieving the current state of the high-pass filter */ |
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hpf_idx = st->hpf_3db_freq_idx; |
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ret = adxrs290_set_filter_freq(indio_dev, lpf_idx, hpf_idx); |
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break; |
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case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: |
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hpf_idx = adxrs290_find_match(adxrs290_hpf_3db_freq_hz_table, |
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ARRAY_SIZE(adxrs290_hpf_3db_freq_hz_table), |
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val, val2); |
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if (hpf_idx < 0) { |
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ret = -EINVAL; |
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break; |
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} |
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/* caching the updated state of the high-pass filter */ |
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st->hpf_3db_freq_idx = hpf_idx; |
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/* retrieving the current state of the low-pass filter */ |
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lpf_idx = st->lpf_3db_freq_idx; |
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ret = adxrs290_set_filter_freq(indio_dev, lpf_idx, hpf_idx); |
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break; |
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default: |
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ret = -EINVAL; |
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break; |
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} |
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iio_device_release_direct_mode(indio_dev); |
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return ret; |
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} |
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static int adxrs290_read_avail(struct iio_dev *indio_dev, |
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struct iio_chan_spec const *chan, |
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const int **vals, int *type, int *length, |
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long mask) |
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{ |
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switch (mask) { |
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case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY: |
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*vals = (const int *)adxrs290_lpf_3db_freq_hz_table; |
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*type = IIO_VAL_INT_PLUS_MICRO; |
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/* Values are stored in a 2D matrix */ |
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*length = ARRAY_SIZE(adxrs290_lpf_3db_freq_hz_table) * 2; |
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return IIO_AVAIL_LIST; |
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case IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY: |
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*vals = (const int *)adxrs290_hpf_3db_freq_hz_table; |
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*type = IIO_VAL_INT_PLUS_MICRO; |
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/* Values are stored in a 2D matrix */ |
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*length = ARRAY_SIZE(adxrs290_hpf_3db_freq_hz_table) * 2; |
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return IIO_AVAIL_LIST; |
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default: |
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return -EINVAL; |
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} |
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} |
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static int adxrs290_reg_access_rw(struct spi_device *spi, unsigned int reg, |
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unsigned int *readval) |
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{ |
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int ret; |
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ret = spi_w8r8(spi, ADXRS290_READ_REG(reg)); |
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if (ret < 0) |
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return ret; |
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*readval = ret; |
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return 0; |
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} |
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static int adxrs290_reg_access(struct iio_dev *indio_dev, unsigned int reg, |
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unsigned int writeval, unsigned int *readval) |
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{ |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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if (readval) |
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return adxrs290_reg_access_rw(st->spi, reg, readval); |
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else |
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return adxrs290_spi_write_reg(st->spi, reg, writeval); |
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} |
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static int adxrs290_data_rdy_trigger_set_state(struct iio_trigger *trig, |
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bool state) |
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{ |
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struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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int ret; |
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u8 val; |
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val = state ? ADXRS290_SYNC(ADXRS290_DATA_RDY_OUT) : 0; |
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ret = adxrs290_spi_write_reg(st->spi, ADXRS290_REG_DATA_RDY, val); |
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if (ret < 0) |
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dev_err(&st->spi->dev, "failed to start data rdy interrupt\n"); |
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return ret; |
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} |
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static void adxrs290_reset_trig(struct iio_trigger *trig) |
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{ |
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struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig); |
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int val; |
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|
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/* |
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* Data ready interrupt is reset after a read of the data registers. |
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* Here, we only read the 16b DATAY registers as that marks the end of |
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* a read of the data registers and initiates a reset for the interrupt |
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* line. |
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*/ |
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adxrs290_get_rate_data(indio_dev, |
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ADXRS290_READ_REG(ADXRS290_REG_DATAY0), &val); |
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} |
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static const struct iio_trigger_ops adxrs290_trigger_ops = { |
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.set_trigger_state = &adxrs290_data_rdy_trigger_set_state, |
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.validate_device = &iio_trigger_validate_own_device, |
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.reenable = &adxrs290_reset_trig, |
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}; |
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static irqreturn_t adxrs290_trigger_handler(int irq, void *p) |
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{ |
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struct iio_poll_func *pf = p; |
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struct iio_dev *indio_dev = pf->indio_dev; |
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struct adxrs290_state *st = iio_priv(indio_dev); |
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u8 tx = ADXRS290_READ_REG(ADXRS290_REG_DATAX0); |
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int ret; |
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mutex_lock(&st->lock); |
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/* exercise a bulk data capture starting from reg DATAX0... */ |
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ret = spi_write_then_read(st->spi, &tx, sizeof(tx), st->buffer.channels, |
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sizeof(st->buffer.channels)); |
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if (ret < 0) |
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goto out_unlock_notify; |
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iio_push_to_buffers_with_timestamp(indio_dev, &st->buffer, |
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pf->timestamp); |
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out_unlock_notify: |
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mutex_unlock(&st->lock); |
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iio_trigger_notify_done(indio_dev->trig); |
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return IRQ_HANDLED; |
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} |
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#define ADXRS290_ANGL_VEL_CHANNEL(reg, axis) { \ |
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.type = IIO_ANGL_VEL, \ |
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.address = reg, \ |
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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_LOW_PASS_FILTER_3DB_FREQUENCY) | \ |
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BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ |
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.info_mask_shared_by_type_available = \ |
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BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY) | \ |
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BIT(IIO_CHAN_INFO_HIGH_PASS_FILTER_3DB_FREQUENCY), \ |
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.scan_index = ADXRS290_IDX_##axis, \ |
|
.scan_type = { \ |
|
.sign = 's', \ |
|
.realbits = 16, \ |
|
.storagebits = 16, \ |
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.endianness = IIO_LE, \ |
|
}, \ |
|
} |
|
|
|
static const struct iio_chan_spec adxrs290_channels[] = { |
|
ADXRS290_ANGL_VEL_CHANNEL(ADXRS290_REG_DATAX0, X), |
|
ADXRS290_ANGL_VEL_CHANNEL(ADXRS290_REG_DATAY0, Y), |
|
{ |
|
.type = IIO_TEMP, |
|
.address = ADXRS290_REG_TEMP0, |
|
.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | |
|
BIT(IIO_CHAN_INFO_SCALE), |
|
.scan_index = ADXRS290_IDX_TEMP, |
|
.scan_type = { |
|
.sign = 's', |
|
.realbits = 12, |
|
.storagebits = 16, |
|
.endianness = IIO_LE, |
|
}, |
|
}, |
|
IIO_CHAN_SOFT_TIMESTAMP(ADXRS290_IDX_TS), |
|
}; |
|
|
|
static const unsigned long adxrs290_avail_scan_masks[] = { |
|
BIT(ADXRS290_IDX_X) | BIT(ADXRS290_IDX_Y) | BIT(ADXRS290_IDX_TEMP), |
|
0 |
|
}; |
|
|
|
static const struct iio_info adxrs290_info = { |
|
.read_raw = &adxrs290_read_raw, |
|
.write_raw = &adxrs290_write_raw, |
|
.read_avail = &adxrs290_read_avail, |
|
.debugfs_reg_access = &adxrs290_reg_access, |
|
}; |
|
|
|
static int adxrs290_probe_trigger(struct iio_dev *indio_dev) |
|
{ |
|
struct adxrs290_state *st = iio_priv(indio_dev); |
|
int ret; |
|
|
|
if (!st->spi->irq) { |
|
dev_info(&st->spi->dev, "no irq, using polling\n"); |
|
return 0; |
|
} |
|
|
|
st->dready_trig = devm_iio_trigger_alloc(&st->spi->dev, "%s-dev%d", |
|
indio_dev->name, |
|
indio_dev->id); |
|
if (!st->dready_trig) |
|
return -ENOMEM; |
|
|
|
st->dready_trig->ops = &adxrs290_trigger_ops; |
|
iio_trigger_set_drvdata(st->dready_trig, indio_dev); |
|
|
|
ret = devm_request_irq(&st->spi->dev, st->spi->irq, |
|
&iio_trigger_generic_data_rdy_poll, |
|
IRQF_ONESHOT, "adxrs290_irq", st->dready_trig); |
|
if (ret < 0) |
|
return dev_err_probe(&st->spi->dev, ret, |
|
"request irq %d failed\n", st->spi->irq); |
|
|
|
ret = devm_iio_trigger_register(&st->spi->dev, st->dready_trig); |
|
if (ret) { |
|
dev_err(&st->spi->dev, "iio trigger register failed\n"); |
|
return ret; |
|
} |
|
|
|
indio_dev->trig = iio_trigger_get(st->dready_trig); |
|
|
|
return 0; |
|
} |
|
|
|
static int adxrs290_probe(struct spi_device *spi) |
|
{ |
|
struct iio_dev *indio_dev; |
|
struct adxrs290_state *st; |
|
u8 val, val2; |
|
int ret; |
|
|
|
indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); |
|
if (!indio_dev) |
|
return -ENOMEM; |
|
|
|
st = iio_priv(indio_dev); |
|
st->spi = spi; |
|
|
|
indio_dev->name = "adxrs290"; |
|
indio_dev->modes = INDIO_DIRECT_MODE; |
|
indio_dev->channels = adxrs290_channels; |
|
indio_dev->num_channels = ARRAY_SIZE(adxrs290_channels); |
|
indio_dev->info = &adxrs290_info; |
|
indio_dev->available_scan_masks = adxrs290_avail_scan_masks; |
|
|
|
mutex_init(&st->lock); |
|
|
|
val = spi_w8r8(spi, ADXRS290_READ_REG(ADXRS290_REG_ADI_ID)); |
|
if (val != ADXRS290_ADI_ID) { |
|
dev_err(&spi->dev, "Wrong ADI ID 0x%02x\n", val); |
|
return -ENODEV; |
|
} |
|
|
|
val = spi_w8r8(spi, ADXRS290_READ_REG(ADXRS290_REG_MEMS_ID)); |
|
if (val != ADXRS290_MEMS_ID) { |
|
dev_err(&spi->dev, "Wrong MEMS ID 0x%02x\n", val); |
|
return -ENODEV; |
|
} |
|
|
|
val = spi_w8r8(spi, ADXRS290_READ_REG(ADXRS290_REG_DEV_ID)); |
|
if (val != ADXRS290_DEV_ID) { |
|
dev_err(&spi->dev, "Wrong DEV ID 0x%02x\n", val); |
|
return -ENODEV; |
|
} |
|
|
|
/* default mode the gyroscope starts in */ |
|
st->mode = ADXRS290_MODE_STANDBY; |
|
|
|
/* switch to measurement mode and switch on the temperature sensor */ |
|
ret = adxrs290_initial_setup(indio_dev); |
|
if (ret < 0) |
|
return ret; |
|
|
|
/* max transition time to measurement mode */ |
|
msleep(ADXRS290_MAX_TRANSITION_TIME_MS); |
|
|
|
ret = adxrs290_get_3db_freq(indio_dev, &val, &val2); |
|
if (ret < 0) |
|
return ret; |
|
|
|
st->lpf_3db_freq_idx = val; |
|
st->hpf_3db_freq_idx = val2; |
|
|
|
ret = devm_iio_triggered_buffer_setup(&spi->dev, indio_dev, |
|
&iio_pollfunc_store_time, |
|
&adxrs290_trigger_handler, NULL); |
|
if (ret < 0) |
|
return dev_err_probe(&spi->dev, ret, |
|
"iio triggered buffer setup failed\n"); |
|
|
|
ret = adxrs290_probe_trigger(indio_dev); |
|
if (ret < 0) |
|
return ret; |
|
|
|
return devm_iio_device_register(&spi->dev, indio_dev); |
|
} |
|
|
|
static const struct of_device_id adxrs290_of_match[] = { |
|
{ .compatible = "adi,adxrs290" }, |
|
{ } |
|
}; |
|
MODULE_DEVICE_TABLE(of, adxrs290_of_match); |
|
|
|
static struct spi_driver adxrs290_driver = { |
|
.driver = { |
|
.name = "adxrs290", |
|
.of_match_table = adxrs290_of_match, |
|
}, |
|
.probe = adxrs290_probe, |
|
}; |
|
module_spi_driver(adxrs290_driver); |
|
|
|
MODULE_AUTHOR("Nishant Malpani <[email protected]>"); |
|
MODULE_DESCRIPTION("Analog Devices ADXRS290 Gyroscope SPI driver"); |
|
MODULE_LICENSE("GPL");
|
|
|