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gpio: uapi: clarify hte references

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The full name of the HTE subsystem is "hardware timestamping engine",
so correct references and highlight that this refers to the HTE
subsystem.

Extend the description of struct gpio_v2_line_event to clarify that
the timestamp_ns is sourced from the HTE if the
GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE is set.

Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
This commit is contained in:
Kent Gibson 2024-01-09 22:02:18 +08:00 committed by Bartosz Golaszewski
parent 7889968e64
commit f75d508eeb
1 changed files with 5 additions and 1 deletions
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6
include/uapi/linux/gpio.h
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@ -67,7 +67,7 @@ struct gpiochip_info {
* @GPIO_V2_LINE_FLAG_BIAS_DISABLED: line has bias disabled
* @GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME: line events contain REALTIME timestamps
* @GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE: line events contain timestamps from
* hardware timestamp engine
* the hardware timestamping engine (HTE) subsystem
*/
enum gpio_v2_line_flag {
GPIO_V2_LINE_FLAG_USED = _BITULL(0),
@ -288,6 +288,10 @@ enum gpio_v2_line_event_id {
*
* If the %GPIO_V2_LINE_FLAG_EVENT_CLOCK_REALTIME flag is set then the
* @timestamp_ns is read from %CLOCK_REALTIME.
*
* If the %GPIO_V2_LINE_FLAG_EVENT_CLOCK_HTE flag is set then the
* @timestamp_ns is provided by the hardware timestamping engine (HTE)
* subsystem.
*/
struct gpio_v2_line_event {
__aligned_u64 timestamp_ns;