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| author | Kent Gibson <warthog618@gmail.com> | 2020-09-28 08:28:07 +0800 |
|---|---|---|
| committer | Bartosz Golaszewski <bgolaszewski@baylibre.com> | 2020-09-30 10:57:30 +0200 |
| commit | cf048e05b68789e9fa35f246f8ecbe95d79f4173 (patch) | |
| tree | 05cad20d35499986c1f9b6be8d4146842108f327 /tools/gpio | |
| parent | 62757c32d5db33fa3abb7b7b88201f9b4ecbc85b (diff) | |
| download | linux-cf048e05b68789e9fa35f246f8ecbe95d79f4173.tar.gz linux-cf048e05b68789e9fa35f246f8ecbe95d79f4173.tar.bz2 linux-cf048e05b68789e9fa35f246f8ecbe95d79f4173.zip | |
tools: gpio: add debounce support to gpio-event-mon
Add support for debouncing monitored lines to gpio-event-mon.
Signed-off-by: Kent Gibson <warthog618@gmail.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Diffstat (limited to 'tools/gpio')
| -rw-r--r-- | tools/gpio/gpio-event-mon.c | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/tools/gpio/gpio-event-mon.c b/tools/gpio/gpio-event-mon.c index 0c34f18f511c..90c3155f05b1 100644 --- a/tools/gpio/gpio-event-mon.c +++ b/tools/gpio/gpio-event-mon.c @@ -148,11 +148,12 @@ void print_usage(void) " -s Set line as open source\n" " -r Listen for rising edges\n" " -f Listen for falling edges\n" + " -b <n> Debounce the line with period n microseconds\n" " [-c <n>] Do <n> loops (optional, infinite loop if not stated)\n" " -? This helptext\n" "\n" "Example:\n" - "gpio-event-mon -n gpiochip0 -o 4 -r -f\n" + "gpio-event-mon -n gpiochip0 -o 4 -r -f -b 10000\n" ); } @@ -167,11 +168,12 @@ int main(int argc, char **argv) unsigned int num_lines = 0; unsigned int loops = 0; struct gpio_v2_line_config config; - int c; + int c, attr, i; + unsigned long debounce_period_us = 0; memset(&config, 0, sizeof(config)); config.flags = GPIO_V2_LINE_FLAG_INPUT; - while ((c = getopt(argc, argv, "c:n:o:dsrf?")) != -1) { + while ((c = getopt(argc, argv, "c:n:o:b:dsrf?")) != -1) { switch (c) { case 'c': loops = strtoul(optarg, NULL, 10); @@ -187,6 +189,9 @@ int main(int argc, char **argv) lines[num_lines] = strtoul(optarg, NULL, 10); num_lines++; break; + case 'b': + debounce_period_us = strtoul(optarg, NULL, 10); + break; case 'd': config.flags |= GPIO_V2_LINE_FLAG_OPEN_DRAIN; break; @@ -205,6 +210,15 @@ int main(int argc, char **argv) } } + if (debounce_period_us) { + attr = config.num_attrs; + config.num_attrs++; + for (i = 0; i < num_lines; i++) + gpiotools_set_bit(&config.attrs[attr].mask, i); + config.attrs[attr].attr.id = GPIO_V2_LINE_ATTR_ID_DEBOUNCE; + config.attrs[attr].attr.debounce_period_us = debounce_period_us; + } + if (!device_name || num_lines == 0) { print_usage(); return -1; |