7f673bb8f5
Currently, there is no way for users to check the readings from thermal sensors from U-boot console, only some boards print it during boot. So, lets add a simple "temperature" command that allows listing thermal uclass devices and getting their value. Note that the thermal devices are intenionally probed if list is used as almost always they will not get probed otherwise and there is no way for users to manually call probe on a certain device from console. Assumption is made that temperature is returned in degrees C and not milidegrees like in Linux as this is what most drivers seem to return. Signed-off-by: Robert Marko <robert.marko@sartura.hr> Reviewed-by: Simon Glass <sjg@chromium.org>
86 lines
1.9 KiB
C
86 lines
1.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2022 Sartura Ltd.
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* Written by Robert Marko <robert.marko@sartura.hr>
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*/
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#include <common.h>
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#include <command.h>
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#include <dm.h>
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#include <thermal.h>
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#define LIMIT_DEVNAME 30
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static int do_get(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct udevice *dev;
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int ret, temp;
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if (argc < 2) {
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printf("thermal device not selected\n");
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return CMD_RET_FAILURE;
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}
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ret = uclass_get_device_by_name(UCLASS_THERMAL, argv[1], &dev);
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if (ret) {
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printf("thermal device not found\n");
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return CMD_RET_FAILURE;
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}
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ret = thermal_get_temp(dev, &temp);
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if (ret)
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return CMD_RET_FAILURE;
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printf("%s: %d C\n", dev->name, temp);
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return CMD_RET_SUCCESS;
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}
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static int do_list(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct udevice *dev;
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printf("| %-*.*s| %-*.*s| %s\n",
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LIMIT_DEVNAME, LIMIT_DEVNAME, "Device",
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LIMIT_DEVNAME, LIMIT_DEVNAME, "Driver",
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"Parent");
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uclass_foreach_dev_probe(UCLASS_THERMAL, dev) {
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printf("| %-*.*s| %-*.*s| %s\n",
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LIMIT_DEVNAME, LIMIT_DEVNAME, dev->name,
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LIMIT_DEVNAME, LIMIT_DEVNAME, dev->driver->name,
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dev->parent->name);
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}
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return CMD_RET_SUCCESS;
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}
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static struct cmd_tbl temperature_subcmd[] = {
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U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""),
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U_BOOT_CMD_MKENT(get, 2, 1, do_get, "", ""),
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};
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static int do_temperature(struct cmd_tbl *cmdtp, int flag, int argc,
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char *const argv[])
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{
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struct cmd_tbl *cmd;
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argc--;
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argv++;
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cmd = find_cmd_tbl(argv[0], temperature_subcmd, ARRAY_SIZE(temperature_subcmd));
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if (!cmd || argc > cmd->maxargs)
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return CMD_RET_USAGE;
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return cmd->cmd(cmdtp, flag, argc, argv);
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}
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U_BOOT_CMD(temperature, CONFIG_SYS_MAXARGS, 1, do_temperature,
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"thermal sensor temperature",
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"list\t\tshow list of temperature sensors\n"
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"get [thermal device name]\tprint temperature in degrees C"
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);
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