@@ -17,10 +17,11 @@ static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'v' },
{ "active-low", no_argument, NULL, 'l' },
+ { "bias", required_argument, NULL, 'B' },
{ GETOPT_NULL_LONGOPT },
};
-static const char *const shortopts = "+hvl";
+static const char *const shortopts = "+hvlB:";
static void print_help(void)
{
@@ -32,6 +33,25 @@ static void print_help(void)
printf(" -h, --help:\t\tdisplay this message and exit\n");
printf(" -v, --version:\tdisplay the version and exit\n");
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("\n");
+ printf("Biases:\n");
+ printf(" as-is:\tleave bias unchanged\n");
+ printf(" disable:\tdisable bias\n");
+ printf(" pull-up:\tenable pull-up\n");
+ printf(" pull-down:\tenable pull-down\n");
+}
+
+static int bias_flags(const char *option)
+{
+ if (strcmp(option, "pull-down") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_PULL_DOWN;
+ if (strcmp(option, "pull-up") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_PULL_UP;
+ if (strcmp(option, "disable") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_DISABLE;
+ return 0;
}
int main(int argc, char **argv)
@@ -39,6 +59,7 @@ int main(int argc, char **argv)
unsigned int *offsets, i, num_lines;
int *values, optc, opti, rv;
bool active_low = false;
+ int flags = 0;
char *device, *end;
for (;;) {
@@ -56,6 +77,9 @@ int main(int argc, char **argv)
case 'l':
active_low = true;
break;
+ case 'B':
+ flags = bias_flags(optarg);
+ break;
case '?':
die("try %s --help", get_progname());
default:
@@ -86,9 +110,9 @@ int main(int argc, char **argv)
die("invalid GPIO offset: %s", argv[i + 1]);
}
- rv = gpiod_ctxless_get_value_multiple(device, offsets, values,
- num_lines, active_low,
- "gpioget");
+ rv = gpiod_ctxless_get_value_multiple_ext(device, offsets, values,
+ num_lines, active_low,
+ "gpioget", flags);
if (rv < 0)
die_perror("error reading GPIO values");
@@ -22,6 +22,7 @@ static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'v' },
{ "active-low", no_argument, NULL, 'l' },
+ { "bias", required_argument, NULL, 'B' },
{ "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 = "+hvln:srfbF:";
+static const char *const shortopts = "+hvlB:n:srfbF:";
static void print_help(void)
{
@@ -43,6 +44,8 @@ static void print_help(void)
printf(" -h, --help:\t\tdisplay this message and exit\n");
printf(" -v, --version:\tdisplay the version and exit\n");
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(" -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");
@@ -50,6 +53,12 @@ static void print_help(void)
printf(" -b, --line-buffered:\tset standard output as line buffered\n");
printf(" -F, --format=FMT\tspecify custom output format\n");
printf("\n");
+ printf("Biases:\n");
+ printf(" as-is:\tleave bias unchanged\n");
+ printf(" disable:\tdisable bias\n");
+ printf(" pull-up:\tenable pull-up\n");
+ printf(" pull-down:\tenable pull-down\n");
+ printf("\n");
printf("Format specifiers:\n");
printf(" %%o: GPIO line offset\n");
printf(" %%e: event type (0 - falling edge, 1 rising edge)\n");
@@ -240,10 +249,22 @@ static int make_signalfd(void)
return sigfd;
}
+static int bias_flags(const char *option)
+{
+ if (strcmp(option, "pull-down") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_PULL_DOWN;
+ if (strcmp(option, "pull-up") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_PULL_UP;
+ if (strcmp(option, "disable") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_DISABLE;
+ return 0;
+}
+
int main(int argc, char **argv)
{
unsigned int offsets[GPIOD_LINE_BULK_MAX_LINES], num_lines = 0, offset;
bool active_low = false, watch_rising = false, watch_falling = false;
+ int flags = 0;
struct timespec timeout = { 10, 0 };
int optc, opti, rv, i, event_type;
struct mon_ctx ctx;
@@ -266,6 +287,9 @@ int main(int argc, char **argv)
case 'l':
active_low = true;
break;
+ case 'B':
+ flags = bias_flags(optarg);
+ break;
case 'n':
ctx.events_wanted = strtoul(optarg, &end, 10);
if (*end != '\0')
@@ -320,11 +344,11 @@ int main(int argc, char **argv)
ctx.sigfd = make_signalfd();
- rv = gpiod_ctxless_event_monitor_multiple(argv[0], event_type,
- offsets, num_lines,
- active_low, "gpiomon",
- &timeout, poll_callback,
- event_callback, &ctx);
+ rv = gpiod_ctxless_event_monitor_multiple_ext(
+ argv[0], event_type, offsets,
+ num_lines, active_low, "gpiomon",
+ &timeout, poll_callback,
+ event_callback, &ctx, flags);
if (rv)
die_perror("error waiting for events");
@@ -23,6 +23,8 @@ static const struct option longopts[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'v' },
{ "active-low", no_argument, NULL, 'l' },
+ { "bias", required_argument, NULL, 'B' },
+ { "drive", required_argument, NULL, 'D' },
{ "mode", required_argument, NULL, 'm' },
{ "sec", required_argument, NULL, 's' },
{ "usec", required_argument, NULL, 'u' },
@@ -30,7 +32,7 @@ static const struct option longopts[] = {
{ GETOPT_NULL_LONGOPT },
};
-static const char *const shortopts = "+hvlm:s:u:b";
+static const char *const shortopts = "+hvlB:D:m:s:u:b";
static void print_help(void)
{
@@ -42,12 +44,27 @@ static void print_help(void)
printf(" -h, --help:\t\tdisplay this message and exit\n");
printf(" -v, --version:\tdisplay the version and exit\n");
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, --drive=[push-pull|open-drain|open-source] (defaults to 'push-pull'):\n");
+ printf(" set the line drive mode\n");
printf(" -m, --mode=[exit|wait|time|signal] (defaults to 'exit'):\n");
printf(" tell the program what to do after setting values\n");
printf(" -s, --sec=SEC:\tspecify the number of seconds to wait (only valid for --mode=time)\n");
printf(" -u, --usec=USEC:\tspecify the number of microseconds to wait (only valid for --mode=time)\n");
printf(" -b, --background:\tafter setting values: detach from the controlling terminal\n");
printf("\n");
+ printf("Biases:\n");
+ printf(" as-is:\tleave bias unchanged\n");
+ printf(" disable:\tdisable bias\n");
+ printf(" pull-up:\tenable pull-up\n");
+ printf(" pull-down:\tenable pull-down\n");
+ printf("\n");
+ printf("Drives:\n");
+ printf(" push-pull:\tdrive the line both high and low\n");
+ printf(" open-drain:\tdrive the line low or go high impedance\n");
+ printf(" open-source:\tdrive the line high or go high impedance\n");
+ printf("\n");
printf("Modes:\n");
printf(" exit:\t\tset values and exit immediately\n");
printf(" wait:\t\tset values and wait for user to press ENTER\n");
@@ -178,11 +195,31 @@ static const struct mode_mapping *parse_mode(const char *mode)
return NULL;
}
+static int bias_flags(const char *option)
+{
+ if (strcmp(option, "pull-down") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_PULL_DOWN;
+ if (strcmp(option, "pull-up") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_PULL_UP;
+ if (strcmp(option, "disable") == 0)
+ return GPIOD_CTXLESS_FLAG_BIAS_DISABLE;
+ return 0;
+}
+
+static int drive_flags(const char *option)
+{
+ if (strcmp(option, "open-drain") == 0)
+ return GPIOD_CTXLESS_FLAG_OPEN_DRAIN;
+ if (strcmp(option, "open-source") == 0)
+ return GPIOD_CTXLESS_FLAG_OPEN_SOURCE;
+ return 0;
+}
+
int main(int argc, char **argv)
{
const struct mode_mapping *mode = &modes[MODE_EXIT];
unsigned int *offsets, num_lines, i;
- int *values, rv, optc, opti;
+ int *values, rv, optc, opti, flags = 0;
struct callback_data cbdata;
bool active_low = false;
char *device, *end;
@@ -204,6 +241,12 @@ int main(int argc, char **argv)
case 'l':
active_low = true;
break;
+ case 'B':
+ flags |= bias_flags(optarg);
+ break;
+ case 'D':
+ flags |= drive_flags(optarg);
+ break;
case 'm':
mode = parse_mode(optarg);
if (!mode)
@@ -268,9 +311,10 @@ int main(int argc, char **argv)
die("invalid offset: %s", argv[i + 1]);
}
- rv = gpiod_ctxless_set_value_multiple(device, offsets, values,
- num_lines, active_low, "gpioset",
- mode->callback, &cbdata);
+ rv = gpiod_ctxless_set_value_multiple_ext(
+ device, offsets, values,
+ num_lines, active_low, "gpioset",
+ mode->callback, &cbdata, flags);
if (rv < 0)
die_perror("error setting the GPIO line values");
Add support for bias flags to applicable tools - gpioget, gpioset, and gpiomon. Signed-off-by: Kent Gibson <warthog618@gmail.com> --- tools/gpioget.c | 32 +++++++++++++++++++++++++---- tools/gpiomon.c | 36 +++++++++++++++++++++++++++------ tools/gpioset.c | 54 ++++++++++++++++++++++++++++++++++++++++++++----- 3 files changed, 107 insertions(+), 15 deletions(-)