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authorMichael Tandy <lkml@mjt.me.uk>2011-09-20 22:42:51 -0700
committerDmitry Torokhov <dmitry.torokhov@gmail.com>2011-09-20 22:46:32 -0700
commit5eb9f900e5b524682ace6771529826c4ce26b6ea (patch)
tree5de1c416327d6a767b3013276608866b58c64bb9 /include/linux/input
parentcca84699a079a91b0a0cb4f2da8548e56859376a (diff)
Input: adxl34x - documentation cleanup
This patch clarifies a few bits of documentation in the header file for the adxl34x driver. Signed-off-by: Michael Tandy <lkml@mkt.me.uk> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
Diffstat (limited to 'include/linux/input')
-rw-r--r--include/linux/input/adxl34x.h21
1 files changed, 14 insertions, 7 deletions
diff --git a/include/linux/input/adxl34x.h b/include/linux/input/adxl34x.h
index df00d998a44..57e01a7cb00 100644
--- a/include/linux/input/adxl34x.h
+++ b/include/linux/input/adxl34x.h
@@ -30,8 +30,9 @@ struct adxl34x_platform_data {
* Y, or Z participation in Tap detection. A '0' excludes the
* selected axis from participation in Tap detection.
* Setting the SUPPRESS bit suppresses Double Tap detection if
- * acceleration greater than tap_threshold is present between
- * taps.
+ * acceleration greater than tap_threshold is present during the
+ * tap_latency period, i.e. after the first tap but before the
+ * opening of the second tap window.
*/
#define ADXL_SUPPRESS (1 << 3)
@@ -226,13 +227,13 @@ struct adxl34x_platform_data {
* detection will begin and prevent the detection of activity. This
* bit serially links the activity and inactivity functions. When '0'
* the inactivity and activity functions are concurrent. Additional
- * information can be found in the Application section under Link
- * Mode.
+ * information can be found in the ADXL34x datasheet's Application
+ * section under Link Mode.
* AUTO_SLEEP: A '1' sets the ADXL34x to switch to Sleep Mode
* when inactivity (acceleration has been below inactivity_threshold
* for at least inactivity_time) is detected and the LINK bit is set.
- * A '0' disables automatic switching to Sleep Mode. See SLEEP
- * for further description.
+ * A '0' disables automatic switching to Sleep Mode. See the
+ * Sleep Bit section of the ADXL34x datasheet for more information.
*/
#define ADXL_LINK (1 << 5)
@@ -266,6 +267,12 @@ struct adxl34x_platform_data {
u8 watermark;
+ /*
+ * When acceleration measurements are received from the ADXL34x
+ * events are sent to the event subsystem. The following settings
+ * select the event type and event code for new x, y and z axis data
+ * respectively.
+ */
u32 ev_type; /* EV_ABS or EV_REL */
u32 ev_code_x; /* ABS_X,Y,Z or REL_X,Y,Z */
@@ -289,7 +296,7 @@ struct adxl34x_platform_data {
u32 ev_code_act_inactivity; /* EV_KEY */
/*
- * Use ADXL34x INT2 instead of INT1
+ * Use ADXL34x INT2 pin instead of INT1 pin for interrupt output
*/
u8 use_int2;