1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
|
// 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 = 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);
}
str_channel = *argv;
channel = simple_strtoul(str_channel, NULL, 10);
argc--;
argv++;
if (sub_cmd == PWM_SET_INVERT) {
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) {
str_period = *argv;
argc--;
argv++;
period_ns = simple_strtoul(str_period, NULL, 10);
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);
}
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");
|
