1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright (C) 2018, STMicroelectronics - All Rights Reserved
4 */
5
6 #include <common.h>
7 #include <command.h>
8 #include <dm.h>
9 #include <errno.h>
10 #include <dm/pinctrl.h>
11 #include <dm/uclass-internal.h>
12
13 #define LIMIT_DEVNAME 30
14
15 static struct udevice *currdev;
16
do_dev(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])17 static int do_dev(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
18 {
19 const char *name;
20 int ret;
21
22 switch (argc) {
23 case 2:
24 name = argv[1];
25 ret = uclass_get_device_by_name(UCLASS_PINCTRL, name, &currdev);
26 if (ret) {
27 printf("Can't get the pin-controller: %s!\n", name);
28 return CMD_RET_FAILURE;
29 }
30 case 1:
31 if (!currdev) {
32 printf("Pin-controller device is not set!\n");
33 return CMD_RET_USAGE;
34 }
35
36 printf("dev: %s\n", currdev->name);
37 }
38
39 return CMD_RET_SUCCESS;
40 }
41
show_pinmux(struct udevice * dev)42 static int show_pinmux(struct udevice *dev)
43 {
44 char pin_name[PINNAME_SIZE];
45 char pin_mux[PINMUX_SIZE];
46 int pins_count;
47 int i;
48 int ret;
49
50 pins_count = pinctrl_get_pins_count(dev);
51
52 if (pins_count == -ENOSYS) {
53 printf("Ops get_pins_count not supported\n");
54 return pins_count;
55 }
56
57 for (i = 0; i < pins_count; i++) {
58 ret = pinctrl_get_pin_name(dev, i, pin_name, PINNAME_SIZE);
59 if (ret == -ENOSYS) {
60 printf("Ops get_pin_name not supported\n");
61 return ret;
62 }
63
64 ret = pinctrl_get_pin_muxing(dev, i, pin_mux, PINMUX_SIZE);
65 if (ret) {
66 printf("Ops get_pin_muxing error (%d)\n", ret);
67 return ret;
68 }
69
70 printf("%-*s: %-*s\n", PINNAME_SIZE, pin_name,
71 PINMUX_SIZE, pin_mux);
72 }
73
74 return 0;
75 }
76
do_status(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])77 static int do_status(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
78 {
79 struct udevice *dev;
80 int ret = CMD_RET_USAGE;
81
82 if (currdev && (argc < 2 || strcmp(argv[1], "-a")))
83 return show_pinmux(currdev);
84
85 if (argc < 2 || strcmp(argv[1], "-a"))
86 return ret;
87
88 uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
89 /* insert a separator between each pin-controller display */
90 printf("--------------------------\n");
91 printf("%s:\n", dev->name);
92 ret = show_pinmux(dev);
93 if (ret < 0)
94 printf("Can't display pin muxing for %s\n",
95 dev->name);
96 }
97
98 return ret;
99 }
100
do_list(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])101 static int do_list(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
102 {
103 struct udevice *dev;
104
105 printf("| %-*.*s| %-*.*s| %s\n",
106 LIMIT_DEVNAME, LIMIT_DEVNAME, "Device",
107 LIMIT_DEVNAME, LIMIT_DEVNAME, "Driver",
108 "Parent");
109
110 uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
111 printf("| %-*.*s| %-*.*s| %s\n",
112 LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name,
113 LIMIT_DEVNAME, LIMIT_DEVNAME, dev->driver->name,
114 dev->parent->name);
115 }
116
117 return CMD_RET_SUCCESS;
118 }
119
120 static cmd_tbl_t pinmux_subcmd[] = {
121 U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
122 U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
123 U_BOOT_CMD_MKENT(status, 2, 1, do_status, "", ""),
124 };
125
do_pinmux(cmd_tbl_t * cmdtp,int flag,int argc,char * const argv[])126 static int do_pinmux(cmd_tbl_t *cmdtp, int flag, int argc,
127 char * const argv[])
128 {
129 cmd_tbl_t *cmd;
130
131 argc--;
132 argv++;
133
134 cmd = find_cmd_tbl(argv[0], pinmux_subcmd, ARRAY_SIZE(pinmux_subcmd));
135 if (!cmd || argc > cmd->maxargs)
136 return CMD_RET_USAGE;
137
138 return cmd->cmd(cmdtp, flag, argc, argv);
139 }
140
141 U_BOOT_CMD(pinmux, CONFIG_SYS_MAXARGS, 1, do_pinmux,
142 "show pin-controller muxing",
143 "list - list UCLASS_PINCTRL devices\n"
144 "pinmux dev [pincontroller-name] - select pin-controller device\n"
145 "pinmux status [-a] - print pin-controller muxing [for all]\n"
146 )
147