+++ /dev/null
-/*
- * LISL02DQ.h -- support STMicroelectronics LISD02DQ
- * 3d 2g Linear Accelerometers via SPI
- *
- * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org>
- *
- * Loosely based upon tle62x0.c
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-#ifndef SPI_LIS3L02DQ_H_
-#define SPI_LIS3L02DQ_H_
-#define LIS3L02DQ_READ_REG(a) ((a) | 0x80)
-#define LIS3L02DQ_WRITE_REG(a) a
-
-/* Calibration parameters */
-#define LIS3L02DQ_REG_OFFSET_X_ADDR 0x16
-#define LIS3L02DQ_REG_OFFSET_Y_ADDR 0x17
-#define LIS3L02DQ_REG_OFFSET_Z_ADDR 0x18
-
-#define LIS3L02DQ_REG_GAIN_X_ADDR 0x19
-#define LIS3L02DQ_REG_GAIN_Y_ADDR 0x1A
-#define LIS3L02DQ_REG_GAIN_Z_ADDR 0x1B
-
-/* Control Register (1 of 2) */
-#define LIS3L02DQ_REG_CTRL_1_ADDR 0x20
-/* Power ctrl - either bit set corresponds to on*/
-#define LIS3L02DQ_REG_CTRL_1_PD_ON 0xC0
-
-/* Decimation Factor */
-#define LIS3L02DQ_DEC_MASK 0x30
-#define LIS3L02DQ_REG_CTRL_1_DF_128 0x00
-#define LIS3L02DQ_REG_CTRL_1_DF_64 0x10
-#define LIS3L02DQ_REG_CTRL_1_DF_32 0x20
-#define LIS3L02DQ_REG_CTRL_1_DF_8 (0x10 | 0x20)
-
-/* Self Test Enable */
-#define LIS3L02DQ_REG_CTRL_1_SELF_TEST_ON 0x08
-
-/* Axes enable ctrls */
-#define LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE 0x04
-#define LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE 0x02
-#define LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE 0x01
-
-/* Control Register (2 of 2) */
-#define LIS3L02DQ_REG_CTRL_2_ADDR 0x21
-
-/* Block Data Update only after MSB and LSB read */
-#define LIS3L02DQ_REG_CTRL_2_BLOCK_UPDATE 0x40
-
-/* Set to big endian output */
-#define LIS3L02DQ_REG_CTRL_2_BIG_ENDIAN 0x20
-
-/* Reboot memory content */
-#define LIS3L02DQ_REG_CTRL_2_REBOOT_MEMORY 0x10
-
-/* Interrupt Enable - applies data ready to the RDY pad */
-#define LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT 0x08
-
-/* Enable Data Ready Generation - relationship with previous unclear in docs */
-#define LIS3L02DQ_REG_CTRL_2_ENABLE_DATA_READY_GENERATION 0x04
-
-/* SPI 3 wire mode */
-#define LIS3L02DQ_REG_CTRL_2_THREE_WIRE_SPI_MODE 0x02
-
-/* Data alignment, default is 12 bit right justified
- * - option for 16 bit left justified
- */
-#define LIS3L02DQ_REG_CTRL_2_DATA_ALIGNMENT_16_BIT_LEFT_JUSTIFIED 0x01
-
-/* Interrupt related stuff */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_ADDR 0x23
-
-/* Switch from or combination of conditions to and */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_BOOLEAN_AND 0x80
-
-/* Latch interrupt request,
- * if on ack must be given by reading the ack register
- */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_LATCH_SRC 0x40
-
-/* Z Interrupt on High (above threshold) */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_INTERRUPT_Z_HIGH 0x20
-/* Z Interrupt on Low */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_INTERRUPT_Z_LOW 0x10
-/* Y Interrupt on High */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_INTERRUPT_Y_HIGH 0x08
-/* Y Interrupt on Low */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_INTERRUPT_Y_LOW 0x04
-/* X Interrupt on High */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_INTERRUPT_X_HIGH 0x02
-/* X Interrupt on Low */
-#define LIS3L02DQ_REG_WAKE_UP_CFG_INTERRUPT_X_LOW 0x01
-
-/* Register that gives description of what caused interrupt
- * - latched if set in CFG_ADDRES
- */
-#define LIS3L02DQ_REG_WAKE_UP_SRC_ADDR 0x24
-/* top bit ignored */
-/* Interrupt Active */
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_ACTIVATED 0x40
-/* Interupts that have been triggered */
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_HIGH 0x20
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_LOW 0x10
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_HIGH 0x08
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_LOW 0x04
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_HIGH 0x02
-#define LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_LOW 0x01
-
-#define LIS3L02DQ_REG_WAKE_UP_ACK_ADDR 0x25
-
-/* Status register */
-#define LIS3L02DQ_REG_STATUS_ADDR 0x27
-/* XYZ axis data overrun - first is all overrun? */
-#define LIS3L02DQ_REG_STATUS_XYZ_OVERRUN 0x80
-#define LIS3L02DQ_REG_STATUS_Z_OVERRUN 0x40
-#define LIS3L02DQ_REG_STATUS_Y_OVERRUN 0x20
-#define LIS3L02DQ_REG_STATUS_X_OVERRUN 0x10
-/* XYZ new data available - first is all 3 available? */
-#define LIS3L02DQ_REG_STATUS_XYZ_NEW_DATA 0x08
-#define LIS3L02DQ_REG_STATUS_Z_NEW_DATA 0x04
-#define LIS3L02DQ_REG_STATUS_Y_NEW_DATA 0x02
-#define LIS3L02DQ_REG_STATUS_X_NEW_DATA 0x01
-
-/* The accelerometer readings - low and high bytes.
- * Form of high byte dependent on justification set in ctrl reg
- */
-#define LIS3L02DQ_REG_OUT_X_L_ADDR 0x28
-#define LIS3L02DQ_REG_OUT_X_H_ADDR 0x29
-#define LIS3L02DQ_REG_OUT_Y_L_ADDR 0x2A
-#define LIS3L02DQ_REG_OUT_Y_H_ADDR 0x2B
-#define LIS3L02DQ_REG_OUT_Z_L_ADDR 0x2C
-#define LIS3L02DQ_REG_OUT_Z_H_ADDR 0x2D
-
-/* Threshold values for all axes and both above and below thresholds
- * - i.e. there is only one value
- */
-#define LIS3L02DQ_REG_THS_L_ADDR 0x2E
-#define LIS3L02DQ_REG_THS_H_ADDR 0x2F
-
-#define LIS3L02DQ_DEFAULT_CTRL1 (LIS3L02DQ_REG_CTRL_1_PD_ON \
- | LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE \
- | LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE \
- | LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE \
- | LIS3L02DQ_REG_CTRL_1_DF_128)
-
-#define LIS3L02DQ_DEFAULT_CTRL2 0
-
-#define LIS3L02DQ_MAX_TX 12
-#define LIS3L02DQ_MAX_RX 12
-/**
- * struct lis3l02dq_state - device instance specific data
- * @us: actual spi_device
- * @trig: data ready trigger registered with iio
- * @buf_lock: mutex to protect tx and rx
- * @tx: transmit buffer
- * @rx: receive buffer
- **/
-struct lis3l02dq_state {
- struct spi_device *us;
- struct iio_trigger *trig;
- struct mutex buf_lock;
- int gpio;
- bool trigger_on;
-
- u8 tx[LIS3L02DQ_MAX_RX] ____cacheline_aligned;
- u8 rx[LIS3L02DQ_MAX_RX] ____cacheline_aligned;
-};
-
-int lis3l02dq_spi_read_reg_8(struct iio_dev *indio_dev,
- u8 reg_address,
- u8 *val);
-
-int lis3l02dq_spi_write_reg_8(struct iio_dev *indio_dev,
- u8 reg_address,
- u8 val);
-
-int lis3l02dq_disable_all_events(struct iio_dev *indio_dev);
-
-#ifdef CONFIG_IIO_BUFFER
-/* At the moment triggers are only used for buffer
- * filling. This may change!
- */
-void lis3l02dq_remove_trigger(struct iio_dev *indio_dev);
-int lis3l02dq_probe_trigger(struct iio_dev *indio_dev);
-
-int lis3l02dq_configure_buffer(struct iio_dev *indio_dev);
-void lis3l02dq_unconfigure_buffer(struct iio_dev *indio_dev);
-
-irqreturn_t lis3l02dq_data_rdy_trig_poll(int irq, void *private);
-#define lis3l02dq_th lis3l02dq_data_rdy_trig_poll
-
-#else /* CONFIG_IIO_BUFFER */
-#define lis3l02dq_th lis3l02dq_nobuffer
-
-static inline void lis3l02dq_remove_trigger(struct iio_dev *indio_dev)
-{
-}
-
-static inline int lis3l02dq_probe_trigger(struct iio_dev *indio_dev)
-{
- return 0;
-}
-
-static int lis3l02dq_configure_buffer(struct iio_dev *indio_dev)
-{
- return 0;
-}
-
-static inline void lis3l02dq_unconfigure_buffer(struct iio_dev *indio_dev)
-{
-}
-#endif /* CONFIG_IIO_BUFFER */
-#endif /* SPI_LIS3L02DQ_H_ */
+++ /dev/null
-/*
- * lis3l02dq.c support STMicroelectronics LISD02DQ
- * 3d 2g Linear Accelerometers via SPI
- *
- * Copyright (c) 2007 Jonathan Cameron <jic23@kernel.org>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * Settings:
- * 16 bit left justified mode used.
- */
-
-#include <linux/interrupt.h>
-#include <linux/irq.h>
-#include <linux/gpio.h>
-#include <linux/of_gpio.h>
-#include <linux/mutex.h>
-#include <linux/device.h>
-#include <linux/kernel.h>
-#include <linux/spi/spi.h>
-#include <linux/slab.h>
-#include <linux/sysfs.h>
-#include <linux/module.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/sysfs.h>
-#include <linux/iio/events.h>
-#include <linux/iio/buffer.h>
-
-#include "lis3l02dq.h"
-
-/* At the moment the spi framework doesn't allow global setting of cs_change.
- * It's in the likely to be added comment at the top of spi.h.
- * This means that use cannot be made of spi_write etc.
- */
-/* direct copy of the irq_default_primary_handler */
-#ifndef CONFIG_IIO_BUFFER
-static irqreturn_t lis3l02dq_nobuffer(int irq, void *private)
-{
- return IRQ_WAKE_THREAD;
-}
-#endif
-
-/**
- * lis3l02dq_spi_read_reg_8() - read single byte from a single register
- * @indio_dev: iio_dev for this actual device
- * @reg_address: the address of the register to be read
- * @val: pass back the resulting value
- **/
-int lis3l02dq_spi_read_reg_8(struct iio_dev *indio_dev,
- u8 reg_address, u8 *val)
-{
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- int ret;
- struct spi_transfer xfer = {
- .tx_buf = st->tx,
- .rx_buf = st->rx,
- .bits_per_word = 8,
- .len = 2,
- };
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = LIS3L02DQ_READ_REG(reg_address);
- st->tx[1] = 0;
-
- ret = spi_sync_transfer(st->us, &xfer, 1);
- *val = st->rx[1];
- mutex_unlock(&st->buf_lock);
-
- return ret;
-}
-
-/**
- * lis3l02dq_spi_write_reg_8() - write single byte to a register
- * @indio_dev: iio_dev for this device
- * @reg_address: the address of the register to be written
- * @val: the value to write
- **/
-int lis3l02dq_spi_write_reg_8(struct iio_dev *indio_dev,
- u8 reg_address,
- u8 val)
-{
- int ret;
- struct lis3l02dq_state *st = iio_priv(indio_dev);
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = LIS3L02DQ_WRITE_REG(reg_address);
- st->tx[1] = val;
- ret = spi_write(st->us, st->tx, 2);
- mutex_unlock(&st->buf_lock);
-
- return ret;
-}
-
-/**
- * lisl302dq_spi_write_reg_s16() - write 2 bytes to a pair of registers
- * @indio_dev: iio_dev for this device
- * @lower_reg_address: the address of the lower of the two registers.
- * Second register is assumed to have address one greater.
- * @value: value to be written
- **/
-static int lis3l02dq_spi_write_reg_s16(struct iio_dev *indio_dev,
- u8 lower_reg_address,
- s16 value)
-{
- int ret;
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- struct spi_transfer xfers[] = { {
- .tx_buf = st->tx,
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- }, {
- .tx_buf = st->tx + 2,
- .bits_per_word = 8,
- .len = 2,
- },
- };
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = LIS3L02DQ_WRITE_REG(lower_reg_address);
- st->tx[1] = value & 0xFF;
- st->tx[2] = LIS3L02DQ_WRITE_REG(lower_reg_address + 1);
- st->tx[3] = (value >> 8) & 0xFF;
-
- ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
- mutex_unlock(&st->buf_lock);
-
- return ret;
-}
-
-static int lis3l02dq_read_reg_s16(struct iio_dev *indio_dev,
- u8 lower_reg_address,
- int *val)
-{
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- int ret;
- s16 tempval;
- struct spi_transfer xfers[] = { {
- .tx_buf = st->tx,
- .rx_buf = st->rx,
- .bits_per_word = 8,
- .len = 2,
- .cs_change = 1,
- }, {
- .tx_buf = st->tx + 2,
- .rx_buf = st->rx + 2,
- .bits_per_word = 8,
- .len = 2,
- },
- };
-
- mutex_lock(&st->buf_lock);
- st->tx[0] = LIS3L02DQ_READ_REG(lower_reg_address);
- st->tx[1] = 0;
- st->tx[2] = LIS3L02DQ_READ_REG(lower_reg_address + 1);
- st->tx[3] = 0;
-
- ret = spi_sync_transfer(st->us, xfers, ARRAY_SIZE(xfers));
- if (ret) {
- dev_err(&st->us->dev, "problem when reading 16 bit register");
- goto error_ret;
- }
- tempval = (s16)(st->rx[1]) | ((s16)(st->rx[3]) << 8);
-
- *val = tempval;
-error_ret:
- mutex_unlock(&st->buf_lock);
- return ret;
-}
-
-enum lis3l02dq_rm_ind {
- LIS3L02DQ_ACCEL,
- LIS3L02DQ_GAIN,
- LIS3L02DQ_BIAS,
-};
-
-static u8 lis3l02dq_axis_map[3][3] = {
- [LIS3L02DQ_ACCEL] = { LIS3L02DQ_REG_OUT_X_L_ADDR,
- LIS3L02DQ_REG_OUT_Y_L_ADDR,
- LIS3L02DQ_REG_OUT_Z_L_ADDR },
- [LIS3L02DQ_GAIN] = { LIS3L02DQ_REG_GAIN_X_ADDR,
- LIS3L02DQ_REG_GAIN_Y_ADDR,
- LIS3L02DQ_REG_GAIN_Z_ADDR },
- [LIS3L02DQ_BIAS] = { LIS3L02DQ_REG_OFFSET_X_ADDR,
- LIS3L02DQ_REG_OFFSET_Y_ADDR,
- LIS3L02DQ_REG_OFFSET_Z_ADDR }
-};
-
-static int lis3l02dq_read_thresh(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)
-{
- int ret;
-
- ret = lis3l02dq_read_reg_s16(indio_dev, LIS3L02DQ_REG_THS_L_ADDR, val);
- if (ret)
- return ret;
- return IIO_VAL_INT;
-}
-
-static int lis3l02dq_write_thresh(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)
-{
- u16 value = val;
-
- return lis3l02dq_spi_write_reg_s16(indio_dev,
- LIS3L02DQ_REG_THS_L_ADDR,
- value);
-}
-
-static int lis3l02dq_write_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int val,
- int val2,
- long mask)
-{
- int ret = -EINVAL, reg;
- u8 uval;
- s8 sval;
-
- switch (mask) {
- case IIO_CHAN_INFO_CALIBBIAS:
- if (val > 255 || val < -256)
- return -EINVAL;
- sval = val;
- reg = lis3l02dq_axis_map[LIS3L02DQ_BIAS][chan->address];
- ret = lis3l02dq_spi_write_reg_8(indio_dev, reg, sval);
- break;
- case IIO_CHAN_INFO_CALIBSCALE:
- if (val & ~0xFF)
- return -EINVAL;
- uval = val;
- reg = lis3l02dq_axis_map[LIS3L02DQ_GAIN][chan->address];
- ret = lis3l02dq_spi_write_reg_8(indio_dev, reg, uval);
- break;
- }
- return ret;
-}
-
-static int lis3l02dq_read_raw(struct iio_dev *indio_dev,
- struct iio_chan_spec const *chan,
- int *val,
- int *val2,
- long mask)
-{
- u8 utemp;
- s8 stemp;
- ssize_t ret = 0;
- u8 reg;
-
- switch (mask) {
- case IIO_CHAN_INFO_RAW:
- /* Take the iio_dev status lock */
- mutex_lock(&indio_dev->mlock);
- if (indio_dev->currentmode == INDIO_BUFFER_TRIGGERED) {
- ret = -EBUSY;
- } else {
- reg = lis3l02dq_axis_map
- [LIS3L02DQ_ACCEL][chan->address];
- ret = lis3l02dq_read_reg_s16(indio_dev, reg, val);
- }
- mutex_unlock(&indio_dev->mlock);
- if (ret < 0)
- goto error_ret;
- return IIO_VAL_INT;
- case IIO_CHAN_INFO_SCALE:
- *val = 0;
- *val2 = 9580;
- return IIO_VAL_INT_PLUS_MICRO;
- case IIO_CHAN_INFO_CALIBSCALE:
- reg = lis3l02dq_axis_map[LIS3L02DQ_GAIN][chan->address];
- ret = lis3l02dq_spi_read_reg_8(indio_dev, reg, &utemp);
- if (ret)
- goto error_ret;
- /* to match with what previous code does */
- *val = utemp;
- return IIO_VAL_INT;
-
- case IIO_CHAN_INFO_CALIBBIAS:
- reg = lis3l02dq_axis_map[LIS3L02DQ_BIAS][chan->address];
- ret = lis3l02dq_spi_read_reg_8(indio_dev, reg, (u8 *)&stemp);
- /* to match with what previous code does */
- *val = stemp;
- return IIO_VAL_INT;
- }
-error_ret:
- return ret;
-}
-
-static ssize_t lis3l02dq_read_frequency(struct device *dev,
- struct device_attribute *attr,
- char *buf)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- int ret, len = 0;
- s8 t;
-
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- (u8 *)&t);
- if (ret)
- return ret;
- t &= LIS3L02DQ_DEC_MASK;
- switch (t) {
- case LIS3L02DQ_REG_CTRL_1_DF_128:
- len = sprintf(buf, "280\n");
- break;
- case LIS3L02DQ_REG_CTRL_1_DF_64:
- len = sprintf(buf, "560\n");
- break;
- case LIS3L02DQ_REG_CTRL_1_DF_32:
- len = sprintf(buf, "1120\n");
- break;
- case LIS3L02DQ_REG_CTRL_1_DF_8:
- len = sprintf(buf, "4480\n");
- break;
- }
- return len;
-}
-
-static ssize_t lis3l02dq_write_frequency(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
-{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
- unsigned long val;
- int ret;
- u8 t;
-
- ret = kstrtoul(buf, 10, &val);
- if (ret)
- return ret;
-
- mutex_lock(&indio_dev->mlock);
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- &t);
- if (ret)
- goto error_ret_mutex;
- /* Wipe the bits clean */
- t &= ~LIS3L02DQ_DEC_MASK;
- switch (val) {
- case 280:
- t |= LIS3L02DQ_REG_CTRL_1_DF_128;
- break;
- case 560:
- t |= LIS3L02DQ_REG_CTRL_1_DF_64;
- break;
- case 1120:
- t |= LIS3L02DQ_REG_CTRL_1_DF_32;
- break;
- case 4480:
- t |= LIS3L02DQ_REG_CTRL_1_DF_8;
- break;
- default:
- ret = -EINVAL;
- goto error_ret_mutex;
- }
-
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- t);
-
-error_ret_mutex:
- mutex_unlock(&indio_dev->mlock);
-
- return ret ? ret : len;
-}
-
-static int lis3l02dq_initial_setup(struct iio_dev *indio_dev)
-{
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- int ret;
- u8 val, valtest;
-
- st->us->mode = SPI_MODE_3;
-
- spi_setup(st->us);
-
- val = LIS3L02DQ_DEFAULT_CTRL1;
- /* Write suitable defaults to ctrl1 */
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- val);
- if (ret) {
- dev_err(&st->us->dev, "problem with setup control register 1");
- goto err_ret;
- }
- /* Repeat as sometimes doesn't work first time? */
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- val);
- if (ret) {
- dev_err(&st->us->dev, "problem with setup control register 1");
- goto err_ret;
- }
-
- /*
- * Read back to check this has worked acts as loose test of correct
- * chip
- */
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- &valtest);
- if (ret || (valtest != val)) {
- dev_err(&indio_dev->dev,
- "device not playing ball %d %d\n", valtest, val);
- ret = -EINVAL;
- goto err_ret;
- }
-
- val = LIS3L02DQ_DEFAULT_CTRL2;
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- val);
- if (ret) {
- dev_err(&st->us->dev, "problem with setup control register 2");
- goto err_ret;
- }
-
- val = LIS3L02DQ_REG_WAKE_UP_CFG_LATCH_SRC;
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_CFG_ADDR,
- val);
- if (ret)
- dev_err(&st->us->dev, "problem with interrupt cfg register");
-err_ret:
-
- return ret;
-}
-
-static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
- lis3l02dq_read_frequency,
- lis3l02dq_write_frequency);
-
-static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("280 560 1120 4480");
-
-static irqreturn_t lis3l02dq_event_handler(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- u8 t;
-
- s64 timestamp = iio_get_time_ns(indio_dev);
-
- lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_SRC_ADDR,
- &t);
-
- if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_HIGH)
- iio_push_event(indio_dev,
- IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_Z,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_RISING),
- timestamp);
-
- if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Z_LOW)
- iio_push_event(indio_dev,
- IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_Z,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_FALLING),
- timestamp);
-
- if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_HIGH)
- iio_push_event(indio_dev,
- IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_Y,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_RISING),
- timestamp);
-
- if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_Y_LOW)
- iio_push_event(indio_dev,
- IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_Y,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_FALLING),
- timestamp);
-
- if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_HIGH)
- iio_push_event(indio_dev,
- IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_X,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_RISING),
- timestamp);
-
- if (t & LIS3L02DQ_REG_WAKE_UP_SRC_INTERRUPT_X_LOW)
- iio_push_event(indio_dev,
- IIO_MOD_EVENT_CODE(IIO_ACCEL,
- 0,
- IIO_MOD_X,
- IIO_EV_TYPE_THRESH,
- IIO_EV_DIR_FALLING),
- timestamp);
-
- /* Ack and allow for new interrupts */
- lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_ACK_ADDR,
- &t);
-
- return IRQ_HANDLED;
-}
-
-static const struct iio_event_spec lis3l02dq_event[] = {
- {
- .type = IIO_EV_TYPE_THRESH,
- .dir = IIO_EV_DIR_RISING,
- .mask_separate = BIT(IIO_EV_INFO_ENABLE),
- .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE),
- }, {
- .type = IIO_EV_TYPE_THRESH,
- .dir = IIO_EV_DIR_FALLING,
- .mask_separate = BIT(IIO_EV_INFO_ENABLE),
- .mask_shared_by_type = BIT(IIO_EV_INFO_VALUE),
- }
-};
-
-#define LIS3L02DQ_CHAN(index, mod) \
- { \
- .type = IIO_ACCEL, \
- .modified = 1, \
- .channel2 = mod, \
- .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
- BIT(IIO_CHAN_INFO_CALIBSCALE) | \
- BIT(IIO_CHAN_INFO_CALIBBIAS), \
- .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
- .address = index, \
- .scan_index = index, \
- .scan_type = { \
- .sign = 's', \
- .realbits = 12, \
- .storagebits = 16, \
- }, \
- .event_spec = lis3l02dq_event, \
- .num_event_specs = ARRAY_SIZE(lis3l02dq_event), \
- }
-
-static const struct iio_chan_spec lis3l02dq_channels[] = {
- LIS3L02DQ_CHAN(0, IIO_MOD_X),
- LIS3L02DQ_CHAN(1, IIO_MOD_Y),
- LIS3L02DQ_CHAN(2, IIO_MOD_Z),
- IIO_CHAN_SOFT_TIMESTAMP(3)
-};
-
-static int lis3l02dq_read_event_config(struct iio_dev *indio_dev,
- const struct iio_chan_spec *chan,
- enum iio_event_type type,
- enum iio_event_direction dir)
-{
- u8 val;
- int ret;
- u8 mask = 1 << (chan->channel2 * 2 + (dir == IIO_EV_DIR_RISING));
-
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_CFG_ADDR,
- &val);
- if (ret < 0)
- return ret;
-
- return !!(val & mask);
-}
-
-int lis3l02dq_disable_all_events(struct iio_dev *indio_dev)
-{
- int ret;
- u8 control, val;
-
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- &control);
-
- control &= ~LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT;
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- control);
- if (ret)
- goto error_ret;
- /* Also for consistency clear the mask */
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_CFG_ADDR,
- &val);
- if (ret)
- goto error_ret;
- val &= ~0x3f;
-
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_CFG_ADDR,
- val);
- if (ret)
- goto error_ret;
-
- ret = control;
-error_ret:
- return ret;
-}
-
-static int lis3l02dq_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)
-{
- int ret = 0;
- u8 val, control;
- u8 currentlyset;
- bool changed = false;
- u8 mask = 1 << (chan->channel2 * 2 + (dir == IIO_EV_DIR_RISING));
-
- mutex_lock(&indio_dev->mlock);
- /* read current control */
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- &control);
- if (ret)
- goto error_ret;
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_CFG_ADDR,
- &val);
- if (ret < 0)
- goto error_ret;
- currentlyset = val & mask;
-
- if (!currentlyset && state) {
- changed = true;
- val |= mask;
- } else if (currentlyset && !state) {
- changed = true;
- val &= ~mask;
- }
-
- if (changed) {
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_CFG_ADDR,
- val);
- if (ret)
- goto error_ret;
- control = val & 0x3f ?
- (control | LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT) :
- (control & ~LIS3L02DQ_REG_CTRL_2_ENABLE_INTERRUPT);
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- control);
- if (ret)
- goto error_ret;
- }
-
-error_ret:
- mutex_unlock(&indio_dev->mlock);
- return ret;
-}
-
-static struct attribute *lis3l02dq_attributes[] = {
- &iio_dev_attr_sampling_frequency.dev_attr.attr,
- &iio_const_attr_sampling_frequency_available.dev_attr.attr,
- NULL
-};
-
-static const struct attribute_group lis3l02dq_attribute_group = {
- .attrs = lis3l02dq_attributes,
-};
-
-static const struct iio_info lis3l02dq_info = {
- .read_raw = &lis3l02dq_read_raw,
- .write_raw = &lis3l02dq_write_raw,
- .read_event_value = &lis3l02dq_read_thresh,
- .write_event_value = &lis3l02dq_write_thresh,
- .write_event_config = &lis3l02dq_write_event_config,
- .read_event_config = &lis3l02dq_read_event_config,
- .driver_module = THIS_MODULE,
- .attrs = &lis3l02dq_attribute_group,
-};
-
-static int lis3l02dq_probe(struct spi_device *spi)
-{
- int ret;
- struct lis3l02dq_state *st;
- struct iio_dev *indio_dev;
-
- indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st));
- if (!indio_dev)
- return -ENOMEM;
- st = iio_priv(indio_dev);
- /* this is only used for removal purposes */
- spi_set_drvdata(spi, indio_dev);
-
- st->us = spi;
- st->gpio = of_get_gpio(spi->dev.of_node, 0);
- mutex_init(&st->buf_lock);
- indio_dev->name = spi->dev.driver->name;
- indio_dev->dev.parent = &spi->dev;
- indio_dev->info = &lis3l02dq_info;
- indio_dev->channels = lis3l02dq_channels;
- indio_dev->num_channels = ARRAY_SIZE(lis3l02dq_channels);
-
- indio_dev->modes = INDIO_DIRECT_MODE;
-
- ret = lis3l02dq_configure_buffer(indio_dev);
- if (ret)
- return ret;
-
- if (spi->irq) {
- ret = request_threaded_irq(st->us->irq,
- &lis3l02dq_th,
- &lis3l02dq_event_handler,
- IRQF_TRIGGER_RISING,
- "lis3l02dq",
- indio_dev);
- if (ret)
- goto error_unreg_buffer_funcs;
-
- ret = lis3l02dq_probe_trigger(indio_dev);
- if (ret)
- goto error_free_interrupt;
- }
-
- /* Get the device into a sane initial state */
- ret = lis3l02dq_initial_setup(indio_dev);
- if (ret)
- goto error_remove_trigger;
-
- ret = iio_device_register(indio_dev);
- if (ret)
- goto error_remove_trigger;
-
- return 0;
-
-error_remove_trigger:
- if (spi->irq)
- lis3l02dq_remove_trigger(indio_dev);
-error_free_interrupt:
- if (spi->irq)
- free_irq(st->us->irq, indio_dev);
-error_unreg_buffer_funcs:
- lis3l02dq_unconfigure_buffer(indio_dev);
- return ret;
-}
-
-/* Power down the device */
-static int lis3l02dq_stop_device(struct iio_dev *indio_dev)
-{
- int ret;
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- u8 val = 0;
-
- mutex_lock(&indio_dev->mlock);
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- val);
- if (ret) {
- dev_err(&st->us->dev, "problem with turning device off: ctrl1");
- goto err_ret;
- }
-
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- val);
- if (ret)
- dev_err(&st->us->dev, "problem with turning device off: ctrl2");
-err_ret:
- mutex_unlock(&indio_dev->mlock);
- return ret;
-}
-
-/* fixme, confirm ordering in this function */
-static int lis3l02dq_remove(struct spi_device *spi)
-{
- struct iio_dev *indio_dev = spi_get_drvdata(spi);
- struct lis3l02dq_state *st = iio_priv(indio_dev);
-
- iio_device_unregister(indio_dev);
-
- lis3l02dq_disable_all_events(indio_dev);
- lis3l02dq_stop_device(indio_dev);
-
- if (spi->irq)
- free_irq(st->us->irq, indio_dev);
-
- lis3l02dq_remove_trigger(indio_dev);
- lis3l02dq_unconfigure_buffer(indio_dev);
-
- return 0;
-}
-
-static struct spi_driver lis3l02dq_driver = {
- .driver = {
- .name = "lis3l02dq",
- },
- .probe = lis3l02dq_probe,
- .remove = lis3l02dq_remove,
-};
-module_spi_driver(lis3l02dq_driver);
-
-MODULE_AUTHOR("Jonathan Cameron <jic23@kernel.org>");
-MODULE_DESCRIPTION("ST LIS3L02DQ Accelerometer SPI driver");
-MODULE_LICENSE("GPL v2");
-MODULE_ALIAS("spi:lis3l02dq");
+++ /dev/null
-#include <linux/interrupt.h>
-#include <linux/gpio.h>
-#include <linux/mutex.h>
-#include <linux/kernel.h>
-#include <linux/spi/spi.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-
-#include <linux/iio/iio.h>
-#include <linux/iio/kfifo_buf.h>
-#include <linux/iio/trigger.h>
-#include <linux/iio/trigger_consumer.h>
-#include "lis3l02dq.h"
-
-/**
- * combine_8_to_16() utility function to munge two u8s into u16
- **/
-static inline u16 combine_8_to_16(u8 lower, u8 upper)
-{
- u16 _lower = lower;
- u16 _upper = upper;
-
- return _lower | (_upper << 8);
-}
-
-/**
- * lis3l02dq_data_rdy_trig_poll() the event handler for the data rdy trig
- **/
-irqreturn_t lis3l02dq_data_rdy_trig_poll(int irq, void *private)
-{
- struct iio_dev *indio_dev = private;
- struct lis3l02dq_state *st = iio_priv(indio_dev);
-
- if (st->trigger_on) {
- iio_trigger_poll(st->trig);
- return IRQ_HANDLED;
- }
-
- return IRQ_WAKE_THREAD;
-}
-
-static const u8 read_all_tx_array[] = {
- LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_X_L_ADDR), 0,
- LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_X_H_ADDR), 0,
- LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_Y_L_ADDR), 0,
- LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_Y_H_ADDR), 0,
- LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_Z_L_ADDR), 0,
- LIS3L02DQ_READ_REG(LIS3L02DQ_REG_OUT_Z_H_ADDR), 0,
-};
-
-/**
- * lis3l02dq_read_all() Reads all channels currently selected
- * @indio_dev: IIO device state
- * @rx_array: (dma capable) receive array, must be at least
- * 4*number of channels
- **/
-static int lis3l02dq_read_all(struct iio_dev *indio_dev, u8 *rx_array)
-{
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- struct spi_transfer *xfers;
- struct spi_message msg;
- int ret, i, j = 0;
-
- xfers = kcalloc(bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) * 2,
- sizeof(*xfers), GFP_KERNEL);
- if (!xfers)
- return -ENOMEM;
-
- mutex_lock(&st->buf_lock);
-
- for (i = 0; i < ARRAY_SIZE(read_all_tx_array) / 4; i++)
- if (test_bit(i, indio_dev->active_scan_mask)) {
- /* lower byte */
- xfers[j].tx_buf = st->tx + (2 * j);
- st->tx[2 * j] = read_all_tx_array[i * 4];
- st->tx[2 * j + 1] = 0;
- if (rx_array)
- xfers[j].rx_buf = rx_array + (j * 2);
- xfers[j].bits_per_word = 8;
- xfers[j].len = 2;
- xfers[j].cs_change = 1;
- j++;
-
- /* upper byte */
- xfers[j].tx_buf = st->tx + (2 * j);
- st->tx[2 * j] = read_all_tx_array[i * 4 + 2];
- st->tx[2 * j + 1] = 0;
- if (rx_array)
- xfers[j].rx_buf = rx_array + (j * 2);
- xfers[j].bits_per_word = 8;
- xfers[j].len = 2;
- xfers[j].cs_change = 1;
- j++;
- }
-
- /* After these are transmitted, the rx_buff should have
- * values in alternate bytes
- */
- spi_message_init(&msg);
- for (j = 0; j < bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength) * 2; j++)
- spi_message_add_tail(&xfers[j], &msg);
-
- ret = spi_sync(st->us, &msg);
- mutex_unlock(&st->buf_lock);
- kfree(xfers);
-
- return ret;
-}
-
-static int lis3l02dq_get_buffer_element(struct iio_dev *indio_dev,
- u8 *buf)
-{
- int ret, i;
- u8 *rx_array;
- s16 *data = (s16 *)buf;
- int scan_count = bitmap_weight(indio_dev->active_scan_mask,
- indio_dev->masklength);
-
- rx_array = kcalloc(4, scan_count, GFP_KERNEL);
- if (!rx_array)
- return -ENOMEM;
- ret = lis3l02dq_read_all(indio_dev, rx_array);
- if (ret < 0) {
- kfree(rx_array);
- return ret;
- }
- for (i = 0; i < scan_count; i++)
- data[i] = combine_8_to_16(rx_array[i * 4 + 1],
- rx_array[i * 4 + 3]);
- kfree(rx_array);
-
- return i * sizeof(data[0]);
-}
-
-static irqreturn_t lis3l02dq_trigger_handler(int irq, void *p)
-{
- struct iio_poll_func *pf = p;
- struct iio_dev *indio_dev = pf->indio_dev;
- int len = 0;
- char *data;
-
- data = kmalloc(indio_dev->scan_bytes, GFP_KERNEL);
- if (!data)
- goto done;
-
- if (!bitmap_empty(indio_dev->active_scan_mask, indio_dev->masklength))
- len = lis3l02dq_get_buffer_element(indio_dev, data);
-
- iio_push_to_buffers_with_timestamp(indio_dev, data, pf->timestamp);
-
- kfree(data);
-done:
- iio_trigger_notify_done(indio_dev->trig);
- return IRQ_HANDLED;
-}
-
-/* Caller responsible for locking as necessary. */
-static int
-__lis3l02dq_write_data_ready_config(struct iio_dev *indio_dev, bool state)
-{
- int ret;
- u8 valold;
- bool currentlyset;
- struct lis3l02dq_state *st = iio_priv(indio_dev);
-
- /* Get the current event mask register */
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- &valold);
- if (ret)
- goto error_ret;
- /* Find out if data ready is already on */
- currentlyset
- = valold & LIS3L02DQ_REG_CTRL_2_ENABLE_DATA_READY_GENERATION;
-
- /* Disable requested */
- if (!state && currentlyset) {
- /* Disable the data ready signal */
- valold &= ~LIS3L02DQ_REG_CTRL_2_ENABLE_DATA_READY_GENERATION;
-
- /* The double write is to overcome a hardware bug? */
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- valold);
- if (ret)
- goto error_ret;
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- valold);
- if (ret)
- goto error_ret;
- st->trigger_on = false;
- /* Enable requested */
- } else if (state && !currentlyset) {
- /* If not set, enable requested
- * first disable all events
- */
- ret = lis3l02dq_disable_all_events(indio_dev);
- if (ret < 0)
- goto error_ret;
-
- valold = ret |
- LIS3L02DQ_REG_CTRL_2_ENABLE_DATA_READY_GENERATION;
-
- st->trigger_on = true;
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_2_ADDR,
- valold);
- if (ret)
- goto error_ret;
- }
-
- return 0;
-error_ret:
- return ret;
-}
-
-/**
- * lis3l02dq_data_rdy_trigger_set_state() set datardy interrupt state
- *
- * If disabling the interrupt also does a final read to ensure it is clear.
- * This is only important in some cases where the scan enable elements are
- * switched before the buffer is reenabled.
- **/
-static int lis3l02dq_data_rdy_trigger_set_state(struct iio_trigger *trig,
- bool state)
-{
- struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
- int ret = 0;
- u8 t;
-
- __lis3l02dq_write_data_ready_config(indio_dev, state);
- if (!state) {
- /*
- * A possible quirk with the handler is currently worked around
- * by ensuring outstanding read events are cleared.
- */
- ret = lis3l02dq_read_all(indio_dev, NULL);
- }
- lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_WAKE_UP_SRC_ADDR,
- &t);
- return ret;
-}
-
-/**
- * lis3l02dq_trig_try_reen() try reenabling irq for data rdy trigger
- * @trig: the datardy trigger
- */
-static int lis3l02dq_trig_try_reen(struct iio_trigger *trig)
-{
- struct iio_dev *indio_dev = iio_trigger_get_drvdata(trig);
- struct lis3l02dq_state *st = iio_priv(indio_dev);
- int i;
-
- /* If gpio still high (or high again)
- * In theory possible we will need to do this several times
- */
- for (i = 0; i < 5; i++)
- if (gpio_get_value(st->gpio))
- lis3l02dq_read_all(indio_dev, NULL);
- else
- break;
- if (i == 5)
- pr_info("Failed to clear the interrupt for lis3l02dq\n");
-
- /* irq reenabled so success! */
- return 0;
-}
-
-static const struct iio_trigger_ops lis3l02dq_trigger_ops = {
- .owner = THIS_MODULE,
- .set_trigger_state = &lis3l02dq_data_rdy_trigger_set_state,
- .try_reenable = &lis3l02dq_trig_try_reen,
-};
-
-int lis3l02dq_probe_trigger(struct iio_dev *indio_dev)
-{
- int ret;
- struct lis3l02dq_state *st = iio_priv(indio_dev);
-
- st->trig = iio_trigger_alloc("lis3l02dq-dev%d", indio_dev->id);
- if (!st->trig) {
- ret = -ENOMEM;
- goto error_ret;
- }
-
- st->trig->dev.parent = &st->us->dev;
- st->trig->ops = &lis3l02dq_trigger_ops;
- iio_trigger_set_drvdata(st->trig, indio_dev);
- ret = iio_trigger_register(st->trig);
- if (ret)
- goto error_free_trig;
-
- return 0;
-
-error_free_trig:
- iio_trigger_free(st->trig);
-error_ret:
- return ret;
-}
-
-void lis3l02dq_remove_trigger(struct iio_dev *indio_dev)
-{
- struct lis3l02dq_state *st = iio_priv(indio_dev);
-
- iio_trigger_unregister(st->trig);
- iio_trigger_free(st->trig);
-}
-
-void lis3l02dq_unconfigure_buffer(struct iio_dev *indio_dev)
-{
- iio_dealloc_pollfunc(indio_dev->pollfunc);
- iio_kfifo_free(indio_dev->buffer);
-}
-
-static int lis3l02dq_buffer_postenable(struct iio_dev *indio_dev)
-{
- /* Disable unwanted channels otherwise the interrupt will not clear */
- u8 t;
- int ret;
- bool oneenabled = false;
-
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- &t);
- if (ret)
- goto error_ret;
-
- if (test_bit(0, indio_dev->active_scan_mask)) {
- t |= LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE;
- oneenabled = true;
- } else {
- t &= ~LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE;
- }
- if (test_bit(1, indio_dev->active_scan_mask)) {
- t |= LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE;
- oneenabled = true;
- } else {
- t &= ~LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE;
- }
- if (test_bit(2, indio_dev->active_scan_mask)) {
- t |= LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE;
- oneenabled = true;
- } else {
- t &= ~LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE;
- }
- if (!oneenabled) /* what happens in this case is unknown */
- return -EINVAL;
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- t);
- if (ret)
- goto error_ret;
-
- return iio_triggered_buffer_postenable(indio_dev);
-error_ret:
- return ret;
-}
-
-/* Turn all channels on again */
-static int lis3l02dq_buffer_predisable(struct iio_dev *indio_dev)
-{
- u8 t;
- int ret;
-
- ret = iio_triggered_buffer_predisable(indio_dev);
- if (ret)
- goto error_ret;
-
- ret = lis3l02dq_spi_read_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- &t);
- if (ret)
- goto error_ret;
- t |= LIS3L02DQ_REG_CTRL_1_AXES_X_ENABLE |
- LIS3L02DQ_REG_CTRL_1_AXES_Y_ENABLE |
- LIS3L02DQ_REG_CTRL_1_AXES_Z_ENABLE;
-
- ret = lis3l02dq_spi_write_reg_8(indio_dev,
- LIS3L02DQ_REG_CTRL_1_ADDR,
- t);
-
-error_ret:
- return ret;
-}
-
-static const struct iio_buffer_setup_ops lis3l02dq_buffer_setup_ops = {
- .postenable = &lis3l02dq_buffer_postenable,
- .predisable = &lis3l02dq_buffer_predisable,
-};
-
-int lis3l02dq_configure_buffer(struct iio_dev *indio_dev)
-{
- int ret;
- struct iio_buffer *buffer;
-
- buffer = iio_kfifo_allocate();
- if (!buffer)
- return -ENOMEM;
-
- iio_device_attach_buffer(indio_dev, buffer);
-
- buffer->scan_timestamp = true;
- indio_dev->setup_ops = &lis3l02dq_buffer_setup_ops;
-
- /* Functions are NULL as we set handler below */
- indio_dev->pollfunc = iio_alloc_pollfunc(&iio_pollfunc_store_time,
- &lis3l02dq_trigger_handler,
- 0,
- indio_dev,
- "lis3l02dq_consumer%d",
- indio_dev->id);
-
- if (!indio_dev->pollfunc) {
- ret = -ENOMEM;
- goto error_iio_sw_rb_free;
- }
-
- indio_dev->modes |= INDIO_BUFFER_TRIGGERED;
- return 0;
-
-error_iio_sw_rb_free:
- iio_kfifo_free(indio_dev->buffer);
- return ret;
-}
projects / deliverable / linux.git / commitdiff
