@@ -8,38 +8,9 @@
#ifndef _ADXL345_H_
#define _ADXL345_H_
-#define ADXL345_REG_DEVID 0x00
-#define ADXL345_REG_OFSX 0x1E
-#define ADXL345_REG_OFSY 0x1F
-#define ADXL345_REG_OFSZ 0x20
-#define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index))
-#define ADXL345_REG_BW_RATE 0x2C
-#define ADXL345_REG_POWER_CTL 0x2D
-#define ADXL345_REG_DATA_FORMAT 0x31
-#define ADXL345_REG_DATAX0 0x32
-#define ADXL345_REG_DATAY0 0x34
-#define ADXL345_REG_DATAZ0 0x36
-#define ADXL345_REG_DATA_AXIS(index) \
- (ADXL345_REG_DATAX0 + (index) * sizeof(__le16))
-
-#define ADXL345_BW_RATE GENMASK(3, 0)
-#define ADXL345_BASE_RATE_NANO_HZ 97656250LL
-
-#define ADXL345_POWER_CTL_MEASURE BIT(3)
-#define ADXL345_POWER_CTL_STANDBY 0x00
-
-#define ADXL345_DATA_FORMAT_RANGE GENMASK(1, 0) /* Set the g range */
-#define ADXL345_DATA_FORMAT_JUSTIFY BIT(2) /* Left-justified (MSB) mode */
-#define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */
+/* Regs and bits needed to be declared globally */
+#define ADXL345_REG_DATA_FORMAT 0x31 /* r/w Data format control */
#define ADXL345_DATA_FORMAT_SPI_3WIRE BIT(6) /* 3-wire SPI mode */
-#define ADXL345_DATA_FORMAT_SELF_TEST BIT(7) /* Enable a self test */
-
-#define ADXL345_DATA_FORMAT_2G 0
-#define ADXL345_DATA_FORMAT_4G 1
-#define ADXL345_DATA_FORMAT_8G 2
-#define ADXL345_DATA_FORMAT_16G 3
-
-#define ADXL345_DEVID 0xE5
/*
* In full-resolution mode, scale factor is maintained at ~4 mg/LSB
@@ -18,6 +18,114 @@
#include "adxl345.h"
+/* ADXL345 register map */
+#define ADXL345_REG_DEVID 0x00 /* r Device ID */
+#define ADXL345_REG_THRESH_TAP 0x1D /* r/w Tap Threshold */
+#define ADXL345_REG_OFSX 0x1E /* r/w X-axis offset */
+#define ADXL345_REG_OFSY 0x1F /* r/w Y-axis offset */
+#define ADXL345_REG_OFSZ 0x20 /* r/w Z-axis offset */
+#define ADXL345_REG_DUR 0x21 /* r/w Tap duration */
+#define ADXL345_REG_LATENT 0x22 /* r/w Tap latency */
+#define ADXL345_REG_WINDOW 0x23 /* r/w Tap window */
+#define ADXL345_REG_THRESH_ACT 0x24 /* r/w Activity threshold */
+#define ADXL345_REG_THRESH_INACT 0x25 /* r/w Inactivity threshold */
+#define ADXL345_REG_TIME_INACT 0x26 /* r/w Inactivity time */
+#define ADXL345_REG_ACT_INACT_CTRL 0x27 /* r/w Axis enable control for */
+ /* activity and inactivity */
+ /* detection */
+#define ADXL345_REG_THRESH_FF 0x28 /* r/w Free-fall threshold */
+#define ADXL345_REG_TIME_FF 0x29 /* r/w Free-fall time */
+#define ADXL345_REG_TAP_AXIS 0x2A /* r/w Axis control for */
+ /* single tap or double tap */
+#define ADXL345_REG_ACT_TAP_STATUS 0x2B /* r Source of single tap or */
+ /* double tap */
+#define ADXL345_REG_BW_RATE 0x2C /* r/w Data rate and power */
+ /* mode control */
+#define ADXL345_REG_POWER_CTL 0x2D /* r/w Power-saving features */
+#define ADXL345_REG_INT_ENABLE 0x2E /* r/w Interrupt enable control */
+#define ADXL345_REG_INT_MAP 0x2F /* r/w Interrupt mapping */
+ /* control */
+#define ADXL345_REG_INT_SOURCE 0x30 /* r Source of interrupts */
+/* NB: ADXL345_REG_DATA_FORMAT 0x31 r/w Data format control,
+ * (defined in header)
+ */
+
+#define ADXL345_REG_XYZ_BASE 0x32 /* r Base address to read out */
+ /* X-, Y- and Z-axis data 0 */
+ /* and 1 */
+#define ADXL345_REG_DATA_AXIS(index) \
+ (ADXL345_REG_XYZ_BASE + (index) * sizeof(__le16))
+/* NB: having DATAX0 and DATAX1 makes 2x sizeof(__le16) */
+
+#define ADXL345_REG_FIFO_CTL 0x38 /* r/w FIFO control */
+#define ADXL345_REG_FIFO_STATUS 0x39 /* r FIFO status */
+
+/* DEVID(s) */
+#define ADXL345_DEVID 0xE5
+
+/* FIFO */
+#define ADXL345_FIFO_CTL_SAMLPES(x) (0x1f & (x))
+#define ADXL345_FIFO_CTL_TRIGGER(x) (0x20 & ((x) << 5)) /* set 1: INT2, 0: INT1 */
+#define ADXL345_FIFO_CTL_MODE(x) (0xc0 & ((x) << 6))
+
+/* INT_ENABLE, INT_MAP, INT_SOURCE bits */
+#define ADXL345_INT_DATA_READY BIT(7)
+#define ADXL345_INT_SINGLE_TAP BIT(6)
+#define ADXL345_INT_DOUBLE_TAP BIT(5)
+#define ADXL345_INT_ACTIVITY BIT(4)
+#define ADXL345_INT_INACTIVITY BIT(3)
+#define ADXL345_INT_FREE_FALL BIT(2)
+#define ADXL345_INT_WATERMARK BIT(1)
+#define ADXL345_INT_OVERRUN BIT(0)
+
+#define ADXL34X_S_TAP_MSK ADXL345_INT_SINGLE_TAP
+#define ADXL34X_D_TAP_MSK ADXL345_INT_DOUBLE_TAP
+
+/* INT1 or INT2 */
+#define ADXL345_INT1 0
+#define ADXL345_INT2 1
+
+/* BW_RATE bits - Bandwidth and output data rate. The default value is
+ * 0x0A, which translates to a 100 Hz output data rate
+ */
+#define ADXL345_BW_RATE GENMASK(3, 0)
+#define ADXL345_BW_LOW_POWER BIT(4)
+#define ADXL345_BASE_RATE_NANO_HZ 97656250LL
+
+/* POWER_CTL bits */
+#define ADXL345_POWER_CTL_STANDBY 0x00
+
+/* NB:
+ * BIT(0), BIT(1) for explicit wakeup (not implemented)
+ * BIT(2) for explicit sleep (not implemented)
+ */
+#define ADXL345_POWER_CTL_MEASURE BIT(3)
+#define ADXL345_POWER_CTL_AUTO_SLEEP BIT(4)
+#define ADXL345_POWER_CTL_LINK BIT(5)
+
+/* DATA_FORMAT bits */
+#define ADXL345_DATA_FORMAT_RANGE GENMASK(1, 0) /* Set the g range */
+#define ADXL345_DATA_FORMAT_JUSTIFY BIT(2) /* 1: left-justified (MSB) mode, 0: right-just'd */
+#define ADXL345_DATA_FORMAT_FULL_RES BIT(3) /* Up to 13-bits resolution */
+/* NB: BIT(6): 3-wire SPI mode (defined in header) */
+
+#define ADXL345_DATA_FORMAT_SELF_TEST BIT(7) /* Enable a self test */
+#define ADXL345_DATA_FORMAT_2G 0
+#define ADXL345_DATA_FORMAT_4G 1
+#define ADXL345_DATA_FORMAT_8G 2
+#define ADXL345_DATA_FORMAT_16G 3
+
+#define ADXL345_REG_OFS_AXIS(index) (ADXL345_REG_OFSX + (index))
+
+/* The ADXL345 include a 32 sample FIFO
+ *
+ * FIFO stores a maximum of 32 entries, which equates to a maximum of 33
+ * entries available at any given time because an additional entry is available
+ * at the output filter of the device.
+ * (see datasheet FIFO_STATUS description on "Entries Bits")
+ */
+#define ADXL34x_FIFO_SIZE 33
+
struct adxl34x_state {
int irq;
const struct adxl345_chip_info *info;
For the implementation of features like FIFO-usage, watermark, single tap, double tap, freefall, etc. most of the constants do not need to be exposed in the header file, but are rather of private nature. Reduce namespace pollution by moving them to the core source file. Signed-off-by: Lothar Rubusch <l.rubusch@gmail.com> --- drivers/iio/accel/adxl345.h | 33 +--------- drivers/iio/accel/adxl345_core.c | 108 +++++++++++++++++++++++++++++++ 2 files changed, 110 insertions(+), 31 deletions(-)