cmd/pinmux.c

   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
  17 static int do_dev(struct cmd_tbl *cmdtp, int flag, int argc,
  18                   char *const argv[])
  19 {
  20         const char *name;
  21         int ret;
  22
  23         switch (argc) {
  24         case 2:
  25                 name = argv[1];
  26                 ret = uclass_get_device_by_name(UCLASS_PINCTRL, name, &currdev);
  27                 if (ret) {
  28                         printf("Can't get the pin-controller: %s!\n", name);
  29                         return CMD_RET_FAILURE;
  30                 }
  31                 /* fall through */
  32         case 1:
  33                 if (!currdev) {
  34                         printf("Pin-controller device is not set!\n");
  35                         return CMD_RET_USAGE;
  36                 }
  37
  38                 printf("dev: %s\n", currdev->name);
  39         }
  40
  41         return CMD_RET_SUCCESS;
  42 }
  43
  44 static int show_pinmux(struct udevice *dev)
  45 {
  46         char pin_name[PINNAME_SIZE];
  47         char pin_mux[PINMUX_SIZE];
  48         int pins_count;
  49         int i;
  50         int ret;
  51
  52         pins_count = pinctrl_get_pins_count(dev);
  53
  54         if (pins_count == -ENOSYS) {
  55                 printf("Ops get_pins_count not supported\n");
  56                 return pins_count;
  57         }
  58
  59         for (i = 0; i < pins_count; i++) {
  60                 ret = pinctrl_get_pin_name(dev, i, pin_name, PINNAME_SIZE);
  61                 if (ret == -ENOSYS) {
  62                         printf("Ops get_pin_name not supported\n");
  63                         return ret;
  64                 }
  65
  66                 ret = pinctrl_get_pin_muxing(dev, i, pin_mux, PINMUX_SIZE);
  67                 if (ret) {
  68                         printf("Ops get_pin_muxing error (%d)\n", ret);
  69                         return ret;
  70                 }
  71
  72                 printf("%-*s: %-*s\n", PINNAME_SIZE, pin_name,
  73                        PINMUX_SIZE, pin_mux);
  74         }
  75
  76         return 0;
  77 }
  78
  79 static int do_status(struct cmd_tbl *cmdtp, int flag, int argc,
  80                      char *const argv[])
  81 {
  82         struct udevice *dev;
  83         int ret = CMD_RET_USAGE;
  84
  85         if (currdev && (argc < 2 || strcmp(argv[1], "-a")))
  86                 return show_pinmux(currdev);
  87
  88         if (argc < 2 || strcmp(argv[1], "-a"))
  89                 return ret;
  90
  91         uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
  92                 /* insert a separator between each pin-controller display */
  93                 printf("--------------------------\n");
  94                 printf("%s:\n", dev->name);
  95                 ret = show_pinmux(dev);
  96                 if (ret < 0)
  97                         printf("Can't display pin muxing for %s\n",
  98                                dev->name);
  99         }
 100
 101         return ret;
 102 }
 103
 104 static int do_list(struct cmd_tbl *cmdtp, int flag, int argc,
 105                    char *const argv[])
 106 {
 107         struct udevice *dev;
 108
 109         printf("| %-*.*s| %-*.*s| %s\n",
 110                LIMIT_DEVNAME, LIMIT_DEVNAME, "Device",
 111                LIMIT_DEVNAME, LIMIT_DEVNAME, "Driver",
 112                "Parent");
 113
 114         uclass_foreach_dev_probe(UCLASS_PINCTRL, dev) {
 115                 printf("| %-*.*s| %-*.*s| %s\n",
 116                        LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name,
 117                        LIMIT_DEVNAME, LIMIT_DEVNAME, dev->driver->name,
 118                        dev->parent->name);
 119         }
 120
 121         return CMD_RET_SUCCESS;
 122 }
 123
 124 static struct cmd_tbl pinmux_subcmd[] = {
 125         U_BOOT_CMD_MKENT(dev, 2, 1, do_dev, "", ""),
 126         U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
 127         U_BOOT_CMD_MKENT(status, 2, 1, do_status, "", ""),
 128 };
 129
 130 static int do_pinmux(struct cmd_tbl *cmdtp, int flag, int argc,
 131                      char *const argv[])
 132 {
 133         struct cmd_tbl *cmd;
 134
 135         argc--;
 136         argv++;
 137
 138         cmd = find_cmd_tbl(argv[0], pinmux_subcmd, ARRAY_SIZE(pinmux_subcmd));
 139         if (!cmd || argc > cmd->maxargs)
 140                 return CMD_RET_USAGE;
 141
 142         return cmd->cmd(cmdtp, flag, argc, argv);
 143 }
 144
 145 U_BOOT_CMD(pinmux, CONFIG_SYS_MAXARGS, 1, do_pinmux,
 146            "show pin-controller muxing",
 147            "list                     - list UCLASS_PINCTRL devices\n"
 148            "pinmux dev [pincontroller-name] - select pin-controller device\n"
 149            "pinmux status [-a]              - print pin-controller muxing [for all]\n"
 150 )