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// SPDX-License-Identifier: GPL-2.0+
/*
* Control PWM channels
*
* Copyright (c) 2020 SiFive, Inc
* author: Pragnesh Patel <pragnesh.patel@sifive.com>
*/
#include <command.h>
#include <dm.h>
#include <pwm.h>
enum pwm_cmd {
PWM_SET_INVERT,
PWM_SET_CONFIG,
PWM_SET_ENABLE,
PWM_SET_DISABLE,
};
static int do_pwm(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
const char *str_cmd, *str_channel = NULL, *str_enable = NULL;
const char *str_pwm = NULL, *str_period = NULL, *str_duty = NULL;
enum pwm_cmd sub_cmd;
struct udevice *dev;
u32 channel, pwm_enable, pwm_dev, period_ns = 0, duty_ns = 0;
int ret;
if (argc < 4)
return CMD_RET_USAGE;
str_cmd = argv[1];
argc -= 2;
argv += 2;
str_pwm = *argv;
argc--;
argv++;
if (!str_pwm)
return CMD_RET_USAGE;
switch (*str_cmd) {
case 'i':
sub_cmd = PWM_SET_INVERT;
if (argc != 2)
return CMD_RET_USAGE;
break;
case 'c':
sub_cmd = PWM_SET_CONFIG;
if (argc != 3)
return CMD_RET_USAGE;
break;
case 'e':
sub_cmd = PWM_SET_ENABLE;
if (argc != 1)
return CMD_RET_USAGE;
break;
case 'd':
sub_cmd = PWM_SET_DISABLE;
if (argc != 1)
return CMD_RET_USAGE;
break;
default:
return CMD_RET_USAGE;
}
pwm_dev = dectoul(str_pwm, NULL);
ret = uclass_get_device(UCLASS_PWM, pwm_dev, &dev);
if (ret) {
printf("pwm: '%s' not found\n", str_pwm);
return cmd_process_error(cmdtp, ret);
}
str_channel = *argv;
channel = dectoul(str_channel, NULL);
argc--;
argv++;
if (sub_cmd == PWM_SET_INVERT) {
str_enable = *argv;
pwm_enable = dectoul(str_enable, NULL);
ret = pwm_set_invert(dev, channel, pwm_enable);
} else if (sub_cmd == PWM_SET_CONFIG) {
str_period = *argv;
argc--;
argv++;
period_ns = dectoul(str_period, NULL);
str_duty = *argv;
duty_ns = dectoul(str_duty, NULL);
ret = pwm_set_config(dev, channel, period_ns, duty_ns);
} else if (sub_cmd == PWM_SET_ENABLE) {
ret = pwm_set_enable(dev, channel, 1);
} else if (sub_cmd == PWM_SET_DISABLE) {
ret = pwm_set_enable(dev, channel, 0);
}
if (ret) {
printf("error(%d)\n", ret);
return CMD_RET_FAILURE;
}
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(pwm, 6, 0, do_pwm,
"control pwm channels",
"invert <pwm_dev_num> <channel> <polarity> - invert polarity\n"
"pwm config <pwm_dev_num> <channel> <period_ns> <duty_ns> - config PWM\n"
"pwm enable <pwm_dev_num> <channel> - enable PWM output\n"
"pwm disable <pwm_dev_num> <channel> - disable PWM output\n"
"Note: All input values are in decimal");
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