ADXRS290_READ_REG
const u8 cmd = ADXRS290_READ_REG(ADXRS290_REG_TEMP0);
const u8 cmd = ADXRS290_READ_REG(ADXRS290_REG_FILTER);
ret = spi_w8r8(st->spi, ADXRS290_READ_REG(ADXRS290_REG_POWER_CTL));
ADXRS290_READ_REG(chan->address),
ret = spi_w8r8(spi, ADXRS290_READ_REG(reg));
ADXRS290_READ_REG(ADXRS290_REG_DATAY0), &val);
u8 tx = ADXRS290_READ_REG(ADXRS290_REG_DATAX0);
val = spi_w8r8(spi, ADXRS290_READ_REG(ADXRS290_REG_ADI_ID));
val = spi_w8r8(spi, ADXRS290_READ_REG(ADXRS290_REG_MEMS_ID));
val = spi_w8r8(spi, ADXRS290_READ_REG(ADXRS290_REG_DEV_ID));