mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-24 21:54:01 +00:00
9e9a530a61
Add the command "pwm" for controlling the pwm channels. This command provides pwm invert/config/enable/disable functionalities via PWM uclass drivers Signed-off-by: Pragnesh Patel <pragnesh.patel@sifive.com> Reviewed-by: Simon Glass <sjg@chromium.org>
117 lines
2.5 KiB
C
117 lines
2.5 KiB
C
// 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;
|
|
|
|
if (argc > 0) {
|
|
str_pwm = *argv;
|
|
argc--;
|
|
argv++;
|
|
}
|
|
|
|
if (!str_pwm)
|
|
return CMD_RET_USAGE;
|
|
|
|
switch (*str_cmd) {
|
|
case 'i':
|
|
sub_cmd = PWM_SET_INVERT;
|
|
break;
|
|
case 'c':
|
|
sub_cmd = PWM_SET_CONFIG;
|
|
break;
|
|
case 'e':
|
|
sub_cmd = PWM_SET_ENABLE;
|
|
break;
|
|
case 'd':
|
|
sub_cmd = PWM_SET_DISABLE;
|
|
break;
|
|
default:
|
|
return CMD_RET_USAGE;
|
|
}
|
|
|
|
pwm_dev = simple_strtoul(str_pwm, NULL, 10);
|
|
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);
|
|
}
|
|
|
|
if (argc > 0) {
|
|
str_channel = *argv;
|
|
channel = simple_strtoul(str_channel, NULL, 10);
|
|
argc--;
|
|
argv++;
|
|
} else {
|
|
return CMD_RET_USAGE;
|
|
}
|
|
|
|
if (sub_cmd == PWM_SET_INVERT && argc > 0) {
|
|
str_enable = *argv;
|
|
pwm_enable = simple_strtoul(str_enable, NULL, 10);
|
|
ret = pwm_set_invert(dev, channel, pwm_enable);
|
|
} else if (sub_cmd == PWM_SET_CONFIG && argc == 2) {
|
|
str_period = *argv;
|
|
argc--;
|
|
argv++;
|
|
period_ns = simple_strtoul(str_period, NULL, 10);
|
|
|
|
if (argc > 0) {
|
|
str_duty = *argv;
|
|
duty_ns = simple_strtoul(str_duty, NULL, 10);
|
|
}
|
|
|
|
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);
|
|
} else {
|
|
printf("PWM arguments missing\n");
|
|
return CMD_RET_FAILURE;
|
|
}
|
|
|
|
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",
|
|
"pwm <invert> <pwm_dev_num> <channel> <polarity>\n"
|
|
"pwm <config> <pwm_dev_num> <channel> <period_ns> <duty_ns>\n"
|
|
"pwm <enable/disable> <pwm_dev_num> <channel>\n"
|
|
"Note: All input values are in decimal");
|