Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /**
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * BMA220 Digital triaxial acceleration sensor driver
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  * Copyright (c) 2016,2020 Intel Corporation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8) #include <linux/bits.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <linux/mod_devicetable.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <linux/spi/spi.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <linux/iio/buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <linux/iio/iio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <linux/iio/sysfs.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <linux/iio/trigger_consumer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <linux/iio/triggered_buffer.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #define BMA220_REG_ID				0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #define BMA220_REG_ACCEL_X			0x02
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) #define BMA220_REG_ACCEL_Y			0x03
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #define BMA220_REG_ACCEL_Z			0x04
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #define BMA220_REG_RANGE			0x11
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #define BMA220_REG_SUSPEND			0x18
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #define BMA220_CHIP_ID				0xDD
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define BMA220_READ_MASK			BIT(7)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #define BMA220_RANGE_MASK			GENMASK(1, 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) #define BMA220_DATA_SHIFT			2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define BMA220_SUSPEND_SLEEP			0xFF
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) #define BMA220_SUSPEND_WAKE			0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) #define BMA220_DEVICE_NAME			"bma220"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #define BMA220_ACCEL_CHANNEL(index, reg, axis) {			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) 	.type = IIO_ACCEL,						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 	.address = reg,							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) 	.modified = 1,							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) 	.channel2 = IIO_MOD_##axis,					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) 	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW),			\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 	.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),		\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) 	.scan_index = index,						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) 	.scan_type = {							\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) 		.sign = 's',						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) 		.realbits = 6,						\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 		.storagebits = 8,					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 		.shift = BMA220_DATA_SHIFT,				\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) 		.endianness = IIO_CPU,					\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50) 	},								\
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53) enum bma220_axis {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) 	AXIS_X,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 	AXIS_Y,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) 	AXIS_Z,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) static const int bma220_scale_table[][2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 	{0, 623000}, {1, 248000}, {2, 491000}, {4, 983000},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) struct bma220_data {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	struct spi_device *spi_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 		s8 chans[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 		/* Ensure timestamp is naturally aligned. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 		s64 timestamp __aligned(8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	} scan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	u8 tx_buf[2] ____cacheline_aligned;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) static const struct iio_chan_spec bma220_channels[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) 	BMA220_ACCEL_CHANNEL(0, BMA220_REG_ACCEL_X, X),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	BMA220_ACCEL_CHANNEL(1, BMA220_REG_ACCEL_Y, Y),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	BMA220_ACCEL_CHANNEL(2, BMA220_REG_ACCEL_Z, Z),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	IIO_CHAN_SOFT_TIMESTAMP(3),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static inline int bma220_read_reg(struct spi_device *spi, u8 reg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	return spi_w8r8(spi, reg | BMA220_READ_MASK);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) static const unsigned long bma220_accel_scan_masks[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	BIT(AXIS_X) | BIT(AXIS_Y) | BIT(AXIS_Z),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) static irqreturn_t bma220_trigger_handler(int irq, void *p)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	struct iio_poll_func *pf = p;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	struct iio_dev *indio_dev = pf->indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	struct bma220_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) 	struct spi_device *spi = data->spi_device;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) 	mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) 	data->tx_buf[0] = BMA220_REG_ACCEL_X | BMA220_READ_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) 	ret = spi_write_then_read(spi, data->tx_buf, 1, &data->scan.chans,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 				  ARRAY_SIZE(bma220_channels) - 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 		goto err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	iio_push_to_buffers_with_timestamp(indio_dev, &data->scan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 					   pf->timestamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) err:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 	mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	iio_trigger_notify_done(indio_dev->trig);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 	return IRQ_HANDLED;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) static int bma220_read_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 			   struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 			   int *val, int *val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) 	u8 range_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) 	struct bma220_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) 	case IIO_CHAN_INFO_RAW:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) 		ret = bma220_read_reg(data->spi_device, chan->address);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 		*val = sign_extend32(ret >> BMA220_DATA_SHIFT, 5);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) 		return IIO_VAL_INT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		ret = bma220_read_reg(data->spi_device, BMA220_REG_RANGE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 			return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) 		range_idx = ret & BMA220_RANGE_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) 		*val = bma220_scale_table[range_idx][0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 		*val2 = bma220_scale_table[range_idx][1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) 		return IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) static int bma220_write_raw(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 			    struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 			    int val, int val2, long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	int index = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) 	struct bma220_data *data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) 		for (i = 0; i < ARRAY_SIZE(bma220_scale_table); i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 			if (val == bma220_scale_table[i][0] &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) 			    val2 == bma220_scale_table[i][1]) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 				index = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 			}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 		if (index < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 			return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 		mutex_lock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 		data->tx_buf[0] = BMA220_REG_RANGE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 		data->tx_buf[1] = index;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 		ret = spi_write(data->spi_device, data->tx_buf,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 				sizeof(data->tx_buf));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 			dev_err(&data->spi_device->dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 				"failed to set measurement range\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 		mutex_unlock(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 	return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) static int bma220_read_avail(struct iio_dev *indio_dev,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 			     struct iio_chan_spec const *chan,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 			     const int **vals, int *type, int *length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 			     long mask)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	switch (mask) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	case IIO_CHAN_INFO_SCALE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		*vals = (int *)bma220_scale_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		*type = IIO_VAL_INT_PLUS_MICRO;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 		*length = ARRAY_SIZE(bma220_scale_table) * 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 		return IIO_AVAIL_LIST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	default:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 		return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) static const struct iio_info bma220_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	.read_raw		= bma220_read_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	.write_raw		= bma220_write_raw,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	.read_avail		= bma220_read_avail,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) static int bma220_init(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	ret = bma220_read_reg(spi, BMA220_REG_ID);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (ret != BMA220_CHIP_ID)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	/* Make sure the chip is powered on */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 	ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	if (ret == BMA220_SUSPEND_WAKE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 		ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	if (ret == BMA220_SUSPEND_WAKE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) static int bma220_deinit(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	/* Make sure the chip is powered off */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	if (ret == BMA220_SUSPEND_SLEEP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 		ret = bma220_read_reg(spi, BMA220_REG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 	if (ret < 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) 	if (ret == BMA220_SUSPEND_SLEEP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 		return -EBUSY;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) static int bma220_probe(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) 	int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) 	struct iio_dev *indio_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) 	struct bma220_data *data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*data));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	if (!indio_dev) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) 		dev_err(&spi->dev, "iio allocation failed!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 		return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	data = iio_priv(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	data->spi_device = spi;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	spi_set_drvdata(spi, indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	mutex_init(&data->lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	indio_dev->info = &bma220_info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 	indio_dev->name = BMA220_DEVICE_NAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	indio_dev->modes = INDIO_DIRECT_MODE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 	indio_dev->channels = bma220_channels;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 	indio_dev->num_channels = ARRAY_SIZE(bma220_channels);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	indio_dev->available_scan_masks = bma220_accel_scan_masks;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	ret = bma220_init(data->spi_device);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	ret = iio_triggered_buffer_setup(indio_dev, iio_pollfunc_store_time,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 					 bma220_trigger_handler, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 		dev_err(&spi->dev, "iio triggered buffer setup failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 		goto err_suspend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 	ret = iio_device_register(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 	if (ret < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 		dev_err(&spi->dev, "iio_device_register failed\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 		iio_triggered_buffer_cleanup(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 		goto err_suspend;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) err_suspend:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	return bma220_deinit(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) static int bma220_remove(struct spi_device *spi)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	struct iio_dev *indio_dev = spi_get_drvdata(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 	iio_device_unregister(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 	iio_triggered_buffer_cleanup(indio_dev);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 	return bma220_deinit(spi);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) static __maybe_unused int bma220_suspend(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	struct bma220_data *data = iio_priv(dev_get_drvdata(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	/* The chip can be suspended/woken up by a simple register read. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	return bma220_read_reg(data->spi_device, BMA220_REG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static __maybe_unused int bma220_resume(struct device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 	struct bma220_data *data = iio_priv(dev_get_drvdata(dev));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	return bma220_read_reg(data->spi_device, BMA220_REG_SUSPEND);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static SIMPLE_DEV_PM_OPS(bma220_pm_ops, bma220_suspend, bma220_resume);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) static const struct spi_device_id bma220_spi_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	{"bma220", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) static const struct acpi_device_id bma220_acpi_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 	{"BMA0220", 0},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	{}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) MODULE_DEVICE_TABLE(spi, bma220_spi_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) static struct spi_driver bma220_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 	.driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 		.name = "bma220_spi",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 		.pm = &bma220_pm_ops,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		.acpi_match_table = bma220_acpi_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	.probe =            bma220_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 	.remove =           bma220_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	.id_table =         bma220_spi_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) module_spi_driver(bma220_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) MODULE_AUTHOR("Tiberiu Breana <tiberiu.a.breana@intel.com>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) MODULE_DESCRIPTION("BMA220 acceleration sensor driver");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) MODULE_LICENSE("GPL v2");