With the v2 API it's now possible to enable debouncing of an input.
Add an option to enable debouncing with a specific period.

Signed-off-by: Ben Hutchings <redacted>
---
 tools/gpiomon.c | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/tools/gpiomon.c b/tools/gpiomon.c
index df86a46..074af6d 100644
--- a/tools/gpiomon.c
+++ b/tools/gpiomon.c

@@ -22,6 +22,7 @@ static const struct option longopts[] = {
        { "version",            no_argument,            NULL,   'v' },
        { "active-low",         no_argument,            NULL,   'l' },
        { "bias",               required_argument,      NULL,   'B' },
+       { "debounce",           required_argument,      NULL,   'd' },
        { "num-events",         required_argument,      NULL,   'n' },
        { "silent",             no_argument,            NULL,   's' },
        { "rising-edge",        no_argument,            NULL,   'r' },

@@ -31,7 +32,7 @@ static const struct option longopts[] = {
        { GETOPT_NULL_LONGOPT },
 };

-static const char *const shortopts = "+hvlB:n:srfbF:";
+static const char *const shortopts = "+hvlB:d:n:srfbF:";

 static void print_help(void)
 {

@@ -46,6 +47,7 @@ static void print_help(void)
        printf("  -l, --active-low:\tset the line active state to low\n");
        printf("  -B, --bias=[as-is|disable|pull-down|pull-up] (defaults to 'as-is'):\n");
        printf("                set the line bias\n");
+       printf("  -d, --debounce=PERIOD: enable debouncing with period in microseconds\n");
        printf("  -n, --num-events=NUM:\texit after processing NUM events\n");
        printf("  -s, --silent:\t\tdon't print event info\n");
        printf("  -r, --rising-edge:\tonly process rising edge events\n");

@@ -157,6 +159,7 @@ int main(int argc, char **argv)
        unsigned int offsets[64], num_lines = 0, offset, events_wanted = 0,
                     events_done = 0;
        bool watch_rising = false, watch_falling = false, active_low = false;
+       unsigned long debounce_period = 0;
        struct gpiod_edge_event_buffer *event_buffer;
        int optc, opti, ret, i, edge, bias = 0;
        uint64_t timeout = 10 * 1000000000LLU;

@@ -195,6 +198,11 @@ int main(int argc, char **argv)
                case 'B':
                        bias = parse_bias(optarg);
                        break;
+               case 'd':
+                       debounce_period = strtoul(optarg, &end, 10);
+                       if (*end != '\0')
+                               die("invalid number: %s", optarg);
+                       break;
                case 'n':
                        events_wanted = strtoul(optarg, &end, 10);
                        if (*end != '\0')

@@ -263,6 +271,8 @@ int main(int argc, char **argv)
        if (active_low)
                gpiod_line_config_set_active_low(line_cfg);
        gpiod_line_config_set_edge_detection(line_cfg, edge);
+       if (debounce_period)
+               gpiod_line_config_set_debounce_period(line_cfg, debounce_period);

        req_cfg = gpiod_request_config_new();
        if (!req_cfg)
--

2.20.1