diff options
Diffstat (limited to 'drivers/counter/interrupt-cnt.c')
| -rw-r--r-- | drivers/counter/interrupt-cnt.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/counter/interrupt-cnt.c b/drivers/counter/interrupt-cnt.c index 3b13f56bbb11..229473855c5b 100644 --- a/drivers/counter/interrupt-cnt.c +++ b/drivers/counter/interrupt-cnt.c @@ -139,12 +139,23 @@ static int interrupt_cnt_signal_read(struct counter_device *counter, return 0; } +static int interrupt_cnt_watch_validate(struct counter_device *counter, + const struct counter_watch *watch) +{ + if (watch->channel != 0 || + watch->event != COUNTER_EVENT_CHANGE_OF_STATE) + return -EINVAL; + + return 0; +} + static const struct counter_ops interrupt_cnt_ops = { .action_read = interrupt_cnt_action_read, .count_read = interrupt_cnt_read, .count_write = interrupt_cnt_write, .function_read = interrupt_cnt_function_read, .signal_read = interrupt_cnt_signal_read, + .watch_validate = interrupt_cnt_watch_validate, }; static int interrupt_cnt_probe(struct platform_device *pdev) @@ -242,3 +253,4 @@ MODULE_ALIAS("platform:interrupt-counter"); MODULE_AUTHOR("Oleksij Rempel <o.rempel@pengutronix.de>"); MODULE_DESCRIPTION("Interrupt counter driver"); MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS(COUNTER); |