diff options
Diffstat (limited to 'cmd/pinmux.c')
| -rw-r--r-- | cmd/pinmux.c | 180 |
1 files changed, 180 insertions, 0 deletions
diff --git a/cmd/pinmux.c b/cmd/pinmux.c new file mode 100644 index 00000000000..01f3e4af6ce --- /dev/null +++ b/cmd/pinmux.c @@ -0,0 +1,180 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (C) 2018, STMicroelectronics - All Rights Reserved + */ + +#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" +); |