Messages in this thread Patch in this message | | | From | William Breathitt Gray <> | Subject | [PATCH] counter: interrupt-cnt: Implement watch_validate callback | Date | Mon, 15 Aug 2022 18:50:58 -0400 |
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The interrupt-cnt counter driver only pushes one type of event on only one channel: COUNTER_EVENT_CHANGE_OF_STATE on channel 0. The interrupt_cnt_watch_validate() watch_valid callback is implemented to ensure watch configurations are valid for this driver.
Cc: Oleksij Rempel <linux@rempel-privat.de> Cc: Pengutronix Kernel Team <kernel@pengutronix.de> Signed-off-by: William Breathitt Gray <william.gray@linaro.org> --- drivers/counter/interrupt-cnt.c | 11 +++++++++++ 1 file changed, 11 insertions(+)
diff --git a/drivers/counter/interrupt-cnt.c b/drivers/counter/interrupt-cnt.c index 3b13f56bbb11..05a5d3e2d2b0 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) base-commit: 568035b01cfb107af8d2e4bd2fb9aea22cf5b868 -- 2.37.2
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