summaryrefslogtreecommitdiff
path: root/cmd/pinmux.c
blob: f17cf4110d9fdf1f0191164e193dd0eee9ea26ef (plain)
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
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
// SPDX-License-Identifier: GPL-2.0+
/*
 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
 */

#include <common.h>
#include <command.h>
#include <dm.h>
#include <errno.h>
#include <dm/pinctrl.h>
#include <dm/uclass-internal.h>

#define LIMIT_DEVNAME	30

static struct udevice *currdev;

static int do_dev(struct cmd_tbl *cmdtp, int flag, int argc,
		  char *const argv[])
{
	const char *name;
	int ret;

	switch (argc) {
	case 2:
		name = argv[1];
		ret = uclass_get_device_by_name(UCLASS_PINCTRL, name, &currdev);
		if (ret) {
			printf("Can't get the pin-controller: %s!\n", name);
			return CMD_RET_FAILURE;
		}
		/* fall through */
	case 1:
		if (!currdev) {
			printf("Pin-controller device is not set!\n");
			return CMD_RET_USAGE;
		}

		printf("dev: %s\n", currdev->name);
	}

	return CMD_RET_SUCCESS;
}

/**
 * Print the muxing information for one or all pins of one pinctrl device
 *
 * @param dev		pinctrl device
 * @param name		NULL to display all the pins
 *			or name of the pin to display
 * Return: 0 on success, non-0 on error
 */
static int show_pinmux(struct udevice *dev, char *name)
{
	char pin_name[PINNAME_SIZE];
	char pin_mux[PINMUX_SIZE];
	int pins_count;
	int i;
	int ret;
	bool found = false;

	pins_count = pinctrl_get_pins_count(dev);

	if (pins_count == -ENOSYS) {
		printf("Ops get_pins_count not supported by %s\n", dev->name);
		return pins_count;
	}

	for (i = 0; i < pins_count; i++) {
		ret = pinctrl_get_pin_name(dev, i, pin_name, PINNAME_SIZE);
		if (ret) {
			printf("Ops get_pin_name error (%d) by %s\n", ret, dev->name);
			return ret;
		}
		if (name && strcmp(name, pin_name))
			continue;
		found = true;
		ret = pinctrl_get_pin_muxing(dev, i, pin_mux, PINMUX_SIZE);
		if (ret) {
			printf("Ops get_pin_muxing error (%d) by %s in %s\n",
			       ret, pin_name, dev->name);
			return ret;
		}

		printf("%-*s: %-*s\n", PINNAME_SIZE, pin_name,
		       PINMUX_SIZE, pin_mux);
	}

	if (!found)
		return -ENOENT;

	return 0;
}

static int do_status(struct cmd_tbl *cmdtp, int flag, int argc,
		     char *const argv[])
{
	struct udevice *dev;
	char *name;
	int ret;

	if (argc < 2) {
		if (!currdev) {
			printf("pin-controller device not selected\n");
			return CMD_RET_FAILURE;
		}
		show_pinmux(currdev, NULL);
		return CMD_RET_SUCCESS;
	}

	if (strcmp(argv[1], "-a"))
		name = argv[1];
	else
		name = NULL;

	uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
		if (!name) {
			/* insert a separator between each pin-controller display */
			printf("--------------------------\n");
			printf("%s:\n", dev->name);
		}
		ret = show_pinmux(dev, name);
		/* stop when the status of requested pin is displayed */
		if (name && !ret)
			return CMD_RET_SUCCESS;
	}

	if (name) {
		printf("%s not found\n", name);
		return CMD_RET_FAILURE;
	}

	return CMD_RET_SUCCESS;
}

static int do_list(struct cmd_tbl *cmdtp, int flag, int argc,
		   char *const argv[])
{
	struct udevice *dev;

	printf("| %-*.*s| %-*.*s| %s\n",
	       LIMIT_DEVNAME, LIMIT_DEVNAME, "Device",
	       LIMIT_DEVNAME, LIMIT_DEVNAME, "Driver",
	       "Parent");

	uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
		printf("| %-*.*s| %-*.*s| %s\n",
		       LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name,
		       LIMIT_DEVNAME, LIMIT_DEVNAME, dev->driver->name,
		       dev->parent->name);
	}

	return CMD_RET_SUCCESS;
}

static struct cmd_tbl pinmux_subcmd[] = {
	U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
	U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
	U_BOOT_CMD_MKENT(status, 2, 1, do_status, "", ""),
};

static int do_pinmux(struct cmd_tbl *cmdtp, int flag, int argc,
		     char *const argv[])
{
	struct cmd_tbl *cmd;

	argc--;
	argv++;

	cmd = find_cmd_tbl(argv[0], pinmux_subcmd, ARRAY_SIZE(pinmux_subcmd));
	if (!cmd || argc > cmd->maxargs)
		return CMD_RET_USAGE;

	return cmd->cmd(cmdtp, flag, argc, argv);
}

U_BOOT_CMD(pinmux, CONFIG_SYS_MAXARGS, 1, do_pinmux,
	   "show pin-controller muxing",
	   "list                     - list UCLASS_PINCTRL devices\n"
	   "pinmux dev [pincontroller-name] - select pin-controller device\n"
	   "pinmux status [-a | pin-name]   - print pin-controller muxing [for all | for pin-name]\n"
)