Signed-off-by: Marc Reilly <[email protected]>
---
commands/Kconfig | 7 ++++++
commands/pwm.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 63 insertions(+)
diff --git a/commands/Kconfig b/commands/Kconfig
index cc7585bbb2..f2a6d22f69 100644
--- a/commands/Kconfig
+++ b/commands/Kconfig
@@ -1940,6 +1940,13 @@ config CMD_PWM
Controls the pwm values such as period and duty cycle
+
+ pwm_get - get pwm state
+
+ Usage: pwm_get [d]
+
+ Displays the pwm values such as period and duty cycle
+
config CMD_LED
bool
depends on LED
diff --git a/commands/pwm.c b/commands/pwm.c
index 94bbbaf1be..18f65b0a59 100644
--- a/commands/pwm.c
+++ b/commands/pwm.c
@@ -141,3 +141,59 @@ BAREBOX_CMD_START(pwm_set)
BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
BAREBOX_CMD_HELP(cmd_pwm_set_help)
BAREBOX_CMD_END
+
+#define HZ_FROM_NANOSECONDS(x) (1000000000UL/(x))
+
+static int do_pwm_get(int argc, char *argv[])
+{
+ struct pwm_device *pwm = NULL;
+ struct pwm_state state;
+ char *devname = NULL;
+ int opt;
+
+ while ((opt = getopt(argc, argv, "d:")) > 0) {
+ switch (opt) {
+ case 'd':
+ devname = optarg;
+ break;
+ }
+ }
+
+ if (!devname) {
+ printf(" need to specify a device\n");
+ return COMMAND_ERROR_USAGE;
+ }
+
+ pwm = pwm_request(devname);
+ if (!pwm) {
+ printf(" pwm device %s not found\n", devname);
+ return -ENODEV;
+ }
+
+ pwm_get_state(pwm, &state);
+
+ printf(" pwm params for '%s':\n", devname);
+ printf(" period : %u (ns)\n", state.period_ns);
+ printf(" duty : %u (ns)\n", state.duty_ns);
+ printf(" enabled : %d\n", state.p_enable);
+ printf(" polarity : %s\n", state.polarity == 0 ? "Normal" :
"Inverted");
+ printf(" freq : %lu (Hz)\n", HZ_FROM_NANOSECONDS(state.period_ns));
+
+ pwm_free(pwm);
+ return 0;
+}
+
+BAREBOX_CMD_HELP_START(pwm_get)
+BAREBOX_CMD_HELP_TEXT("Gets a pwm device parameters.")
+BAREBOX_CMD_HELP_TEXT(" Specify the device by device name")
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT("-d string", "device name (eg 'pwm0')")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(pwm_get)
+ .cmd = do_pwm_get,
+ BAREBOX_CMD_DESC("get pwm")
+ BAREBOX_CMD_OPTS("[-d]")
+ BAREBOX_CMD_GROUP(CMD_GRP_HWMANIP)
+ BAREBOX_CMD_HELP(cmd_pwm_get_help)
+BAREBOX_CMD_END
--
2.35.3
