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iio:imu:adis: Add support for 32bit registers

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Some of the newer generation devices from the ADIS16XXX family have 32bit wide
register which spans two 16bit wide registers. This patch adds support for
reading and writing a 32bit wide register.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen
2012-11-20 13:36:00 +00:00
committed by Jonathan Cameron
parent 78026a6fde
commit 57a1228a06
3 changed files with 171 additions and 57 deletions
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81
include/linux/iio/imu/adis.h
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@@ -53,7 +53,7 @@ struct adis {
struct spi_transfer *xfer;
void *buffer;
uint8_t tx[8] ____cacheline_aligned;
uint8_t tx[10] ____cacheline_aligned;
uint8_t rx[4];
};
@@ -61,9 +61,82 @@ int adis_init(struct adis *adis, struct iio_dev *indio_dev,
struct spi_device *spi, const struct adis_data *data);
int adis_reset(struct adis *adis);
int adis_write_reg_8(struct adis *adis, unsigned int reg, uint8_t val);
int adis_write_reg_16(struct adis *adis, unsigned int reg, uint16_t val);
int adis_read_reg_16(struct adis *adis, unsigned int reg, uint16_t *val);
int adis_write_reg(struct adis *adis, unsigned int reg,
unsigned int val, unsigned int size);
int adis_read_reg(struct adis *adis, unsigned int reg,
unsigned int *val, unsigned int size);
/**
* adis_write_reg_8() - Write single byte to a register
* @adis: The adis device
* @reg: The address of the register to be written
* @value: The value to write
*/
static inline int adis_write_reg_8(struct adis *adis, unsigned int reg,
uint8_t val)
{
return adis_write_reg(adis, reg, val, 1);
}
/**
* adis_write_reg_16() - Write 2 bytes to a pair of registers
* @adis: The adis device
* @reg: The address of the lower of the two registers
* @value: Value to be written
*/
static inline int adis_write_reg_16(struct adis *adis, unsigned int reg,
uint16_t val)
{
return adis_write_reg(adis, reg, val, 2);
}
/**
* adis_write_reg_32() - write 4 bytes to four registers
* @adis: The adis device
* @reg: The address of the lower of the four register
* @value: Value to be written
*/
static inline int adis_write_reg_32(struct adis *adis, unsigned int reg,
uint32_t val)
{
return adis_write_reg(adis, reg, val, 4);
}
/**
* adis_read_reg_16() - read 2 bytes from a 16-bit register
* @adis: The adis device
* @reg: The address of the lower of the two registers
* @val: The value read back from the device
*/
static inline int adis_read_reg_16(struct adis *adis, unsigned int reg,
uint16_t *val)
{
unsigned int tmp;
int ret;
ret = adis_read_reg(adis, reg, &tmp, 2);
*val = tmp;
return ret;
}
/**
* adis_read_reg_32() - read 4 bytes from a 32-bit register
* @adis: The adis device
* @reg: The address of the lower of the two registers
* @val: The value read back from the device
*/
static inline int adis_read_reg_32(struct adis *adis, unsigned int reg,
uint32_t *val)
{
unsigned int tmp;
int ret;
ret = adis_read_reg(adis, reg, &tmp, 4);
*val = tmp;
return ret;
}
int adis_enable_irq(struct adis *adis, bool enable);
int adis_check_status(struct adis *adis);