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/* SPDX-License-Identifier: 0BSD */
/* SPDX-FileCopyrightText: 2023 Uwe Kleine-König <u.kleine-koenig@pengutronix.de> */
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <pwm.h>
int main(int argc, char *const argv[])
{
struct pwm_chip *chip;
struct pwm *pwm;
struct pwm_state state = {
.period = 50000,
.duty_cycle = 0,
.duty_offset = 0,
};
int ret;
int opt;
unsigned int chipno = 0;
unsigned int pwmno = 0;
while ((opt = getopt(argc, argv, "c:p:P:")) != -1) {
switch (opt) {
case 'c':
chipno = atoi(optarg);
break;
case 'p':
pwmno = atoi(optarg);
break;
case 'P':
state.period = atoll(optarg);
break;
default:
return EXIT_FAILURE;
}
}
chip = pwm_chip_open_by_number(chipno);
if (!chip) {
perror("Failed to open pwmchip0");
return EXIT_FAILURE;
}
pwm = pwm_chip_get_pwm(chip, pwmno);
if (!pwm) {
perror("Failed to get pwm0");
return EXIT_FAILURE;
}
for (state.duty_cycle = 0; state.duty_cycle <= state.period; ++state.duty_cycle) {
ret = pwm_apply_state(pwm, &state);
if (ret < 0) {
perror("Failed to configure PWM");
return EXIT_FAILURE;
}
}
pwm_chip_close(chip);
return EXIT_SUCCESS;
}
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