diff options
Diffstat (limited to 'drivers/iio')
-rw-r--r-- | drivers/iio/accel/Kconfig | 1 | ||||
-rw-r--r-- | drivers/iio/accel/kxsd9-spi.c | 79 | ||||
-rw-r--r-- | drivers/iio/accel/kxsd9.c | 40 | ||||
-rw-r--r-- | drivers/iio/accel/kxsd9.h | 22 |
4 files changed, 43 insertions, 99 deletions
diff --git a/drivers/iio/accel/Kconfig b/drivers/iio/accel/Kconfig index 89bc5c5d6fd0..eebc20d6c827 100644 --- a/drivers/iio/accel/Kconfig +++ b/drivers/iio/accel/Kconfig @@ -131,6 +131,7 @@ config KXSD9_SPI depends on KXSD9 depends on SPI default KXSD9 + select REGMAP_SPI help Say yes here to enable the Kionix KXSD9 accelerometer SPI transport channel. diff --git a/drivers/iio/accel/kxsd9-spi.c b/drivers/iio/accel/kxsd9-spi.c index a49c10cd7634..c5af51b7dd7e 100644 --- a/drivers/iio/accel/kxsd9-spi.c +++ b/drivers/iio/accel/kxsd9-spi.c @@ -3,75 +3,30 @@ #include <linux/spi/spi.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/regmap.h> #include "kxsd9.h" -#define KXSD9_READ(a) (0x80 | (a)) -#define KXSD9_WRITE(a) (a) - -static int kxsd9_spi_readreg(struct kxsd9_transport *tr, u8 address) -{ - struct spi_device *spi = tr->trdev; - - return spi_w8r8(spi, KXSD9_READ(address)); -} - -static int kxsd9_spi_writereg(struct kxsd9_transport *tr, u8 address, u8 val) -{ - struct spi_device *spi = tr->trdev; - - tr->tx[0] = KXSD9_WRITE(address), - tr->tx[1] = val; - return spi_write(spi, tr->tx, 2); -} - -static int kxsd9_spi_readval(struct kxsd9_transport *tr, u8 address) -{ - struct spi_device *spi = tr->trdev; - struct spi_transfer xfers[] = { - { - .bits_per_word = 8, - .len = 1, - .delay_usecs = 200, - .tx_buf = tr->tx, - }, { - .bits_per_word = 8, - .len = 2, - .rx_buf = tr->rx, - }, - }; - int ret; - - tr->tx[0] = KXSD9_READ(address); - ret = spi_sync_transfer(spi, xfers, ARRAY_SIZE(xfers)); - if (!ret) - ret = (((u16)(tr->rx[0])) << 8) | (tr->rx[1]); - return ret; -} - static int kxsd9_spi_probe(struct spi_device *spi) { - struct kxsd9_transport *transport; - int ret; - - transport = devm_kzalloc(&spi->dev, sizeof(*transport), GFP_KERNEL); - if (!transport) - return -ENOMEM; + static const struct regmap_config config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x0e, + }; + struct regmap *regmap; - transport->trdev = spi; - transport->readreg = kxsd9_spi_readreg; - transport->writereg = kxsd9_spi_writereg; - transport->readval = kxsd9_spi_readval; spi->mode = SPI_MODE_0; - spi_setup(spi); - - ret = kxsd9_common_probe(&spi->dev, - transport, - spi_get_device_id(spi)->name); - if (ret) - return ret; - - return 0; + regmap = devm_regmap_init_spi(spi, &config); + if (IS_ERR(regmap)) { + dev_err(&spi->dev, "%s: regmap allocation failed: %ld\n", + __func__, PTR_ERR(regmap)); + return PTR_ERR(regmap); + } + + return kxsd9_common_probe(&spi->dev, + regmap, + spi_get_device_id(spi)->name); } static int kxsd9_spi_remove(struct spi_device *spi) diff --git a/drivers/iio/accel/kxsd9.c b/drivers/iio/accel/kxsd9.c index a787ec236608..c065c6e09fa4 100644 --- a/drivers/iio/accel/kxsd9.c +++ b/drivers/iio/accel/kxsd9.c @@ -21,7 +21,7 @@ #include <linux/sysfs.h> #include <linux/slab.h> #include <linux/module.h> - +#include <linux/regmap.h> #include <linux/iio/iio.h> #include <linux/iio/sysfs.h> @@ -46,7 +46,7 @@ * @us: spi device **/ struct kxsd9_state { - struct kxsd9_transport *transport; + struct regmap *map; struct mutex buf_lock; }; @@ -63,6 +63,7 @@ static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro) int ret, i; struct kxsd9_state *st = iio_priv(indio_dev); bool foundit = false; + unsigned int val; for (i = 0; i < 4; i++) if (micro == kxsd9_micro_scales[i]) { @@ -73,13 +74,14 @@ static int kxsd9_write_scale(struct iio_dev *indio_dev, int micro) return -EINVAL; mutex_lock(&st->buf_lock); - ret = st->transport->readreg(st->transport, - KXSD9_REG_CTRL_C); + ret = regmap_read(st->map, + KXSD9_REG_CTRL_C, + &val); if (ret < 0) goto error_ret; - ret = st->transport->writereg(st->transport, - KXSD9_REG_CTRL_C, - (ret & ~KXSD9_FS_MASK) | i); + ret = regmap_write(st->map, + KXSD9_REG_CTRL_C, + (val & ~KXSD9_FS_MASK) | i); error_ret: mutex_unlock(&st->buf_lock); return ret; @@ -89,11 +91,15 @@ static int kxsd9_read(struct iio_dev *indio_dev, u8 address) { int ret; struct kxsd9_state *st = iio_priv(indio_dev); + __be16 raw_val; mutex_lock(&st->buf_lock); - ret = st->transport->readval(st->transport, address); + ret = regmap_bulk_read(st->map, address, &raw_val, sizeof(raw_val)); + if (ret) + goto out_fail_read; /* Only 12 bits are valid */ - ret &= 0xfff0; + ret = be16_to_cpu(raw_val) & 0xfff0; +out_fail_read: mutex_unlock(&st->buf_lock); return ret; } @@ -133,6 +139,7 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev, { int ret = -EINVAL; struct kxsd9_state *st = iio_priv(indio_dev); + unsigned int regval; switch (mask) { case IIO_CHAN_INFO_RAW: @@ -143,12 +150,13 @@ static int kxsd9_read_raw(struct iio_dev *indio_dev, ret = IIO_VAL_INT; break; case IIO_CHAN_INFO_SCALE: - ret = st->transport->readreg(st->transport, - KXSD9_REG_CTRL_C); + ret = regmap_read(st->map, + KXSD9_REG_CTRL_C, + ®val); if (ret < 0) goto error_ret; *val = 0; - *val2 = kxsd9_micro_scales[ret & KXSD9_FS_MASK]; + *val2 = kxsd9_micro_scales[regval & KXSD9_FS_MASK]; ret = IIO_VAL_INT_PLUS_MICRO; break; } @@ -184,10 +192,10 @@ static int kxsd9_power_up(struct kxsd9_state *st) { int ret; - ret = st->transport->writereg(st->transport, KXSD9_REG_CTRL_B, 0x40); + ret = regmap_write(st->map, KXSD9_REG_CTRL_B, 0x40); if (ret) return ret; - return st->transport->writereg(st->transport, KXSD9_REG_CTRL_C, 0x9b); + return regmap_write(st->map, KXSD9_REG_CTRL_C, 0x9b); }; static const struct iio_info kxsd9_info = { @@ -198,7 +206,7 @@ static const struct iio_info kxsd9_info = { }; int kxsd9_common_probe(struct device *parent, - struct kxsd9_transport *transport, + struct regmap *map, const char *name) { struct iio_dev *indio_dev; @@ -210,7 +218,7 @@ int kxsd9_common_probe(struct device *parent, return -ENOMEM; st = iio_priv(indio_dev); - st->transport = transport; + st->map = map; mutex_init(&st->buf_lock); indio_dev->channels = kxsd9_channels; diff --git a/drivers/iio/accel/kxsd9.h b/drivers/iio/accel/kxsd9.h index b6328e88b56f..19131a7a692c 100644 --- a/drivers/iio/accel/kxsd9.h +++ b/drivers/iio/accel/kxsd9.h @@ -4,27 +4,7 @@ #define KXSD9_STATE_RX_SIZE 2 #define KXSD9_STATE_TX_SIZE 2 -struct kxsd9_transport; - -/** - * struct kxsd9_transport - transport adapter for SPI or I2C - * @trdev: transport device such as SPI or I2C - * @readreg(): function to read a byte from an address in the device - * @writereg(): function to write a byte to an address in the device - * @readval(): function to read a 16bit value from the device - * @rx: cache aligned read buffer - * @tx: cache aligned write buffer - */ -struct kxsd9_transport { - void *trdev; - int (*readreg) (struct kxsd9_transport *tr, u8 address); - int (*writereg) (struct kxsd9_transport *tr, u8 address, u8 val); - int (*readval) (struct kxsd9_transport *tr, u8 address); - u8 rx[KXSD9_STATE_RX_SIZE] ____cacheline_aligned; - u8 tx[KXSD9_STATE_TX_SIZE]; -}; - int kxsd9_common_probe(struct device *parent, - struct kxsd9_transport *transport, + struct regmap *map, const char *name); int kxsd9_common_remove(struct device *parent); |