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 --- cmd/Kconfig | 6 ++++ cmd/Makefile | 1 + cmd/temperature.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 93 insertions(+) create mode 100644 cmd/temperature.c
diff --git a/cmd/Kconfig b/cmd/Kconfig index 3625ff2a50..9bd639c740 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1435,6 +1435,12 @@ config DEFAULT_SPI_MODE depends on CMD_SPI default 0
+config CMD_TEMPERATURE + bool "temperature" + depends on DM_THERMAL + help + Provides a way to get the temperature reading from thermal sensors. + config CMD_TSI148 bool "tsi148 - Command to access tsi148 device" help diff --git a/cmd/Makefile b/cmd/Makefile index 5e43a1e022..8874462f1a 100644 --- a/cmd/Makefile +++ b/cmd/Makefile @@ -152,6 +152,7 @@ obj-$(CONFIG_CMD_STRINGS) += strings.o obj-$(CONFIG_CMD_SMC) += smccc.o obj-$(CONFIG_CMD_SYSBOOT) += sysboot.o obj-$(CONFIG_CMD_STACKPROTECTOR_TEST) += stackprot_test.o +obj-$(CONFIG_CMD_TEMPERATURE) += temperature.o obj-$(CONFIG_CMD_TERMINAL) += terminal.o obj-$(CONFIG_CMD_TIME) += time.o obj-$(CONFIG_CMD_TIMER) += timer.o diff --git a/cmd/temperature.c b/cmd/temperature.c new file mode 100644 index 0000000000..ccf839058e --- /dev/null +++ b/cmd/temperature.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0-or-later + +/* + * Copyright (c) 2022 Sartura Ltd. + * Written by Robert Marko robert.marko@sartura.hr + */ + +#include <common.h> +#include <command.h> +#include <dm.h> +#include <dm/uclass-internal.h> +#include <thermal.h> + +#define LIMIT_DEVNAME 30 + +static int do_get(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct udevice *dev; + int ret, temp; + + if (argc < 2) { + printf("thermal device not selected\n"); + return CMD_RET_FAILURE; + } + + ret = uclass_find_device_by_name(UCLASS_THERMAL, argv[1], &dev); + if (ret) { + printf("thermal device not found\n"); + return CMD_RET_FAILURE; + } + + ret = thermal_get_temp(dev, &temp); + if (ret) + return CMD_RET_FAILURE; + + printf("%s: %d°C\n", dev->name, temp); + + 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_THERMAL, 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 temperature_subcmd[] = { + U_BOOT_CMD_MKENT(list, 1, 1, do_list, "", ""), + U_BOOT_CMD_MKENT(get, 2, 1, do_get, "", ""), +}; + +static int do_temperature(struct cmd_tbl *cmdtp, int flag, int argc, + char *const argv[]) +{ + struct cmd_tbl *cmd; + + argc--; + argv++; + + cmd = find_cmd_tbl(argv[0], temperature_subcmd, ARRAY_SIZE(temperature_subcmd)); + if (!cmd || argc > cmd->maxargs) + return CMD_RET_USAGE; + + return cmd->cmd(cmdtp, flag, argc, argv); +} + +U_BOOT_CMD(temperature, CONFIG_SYS_MAXARGS, 1, do_temperature, + "thermal sensor temperature", + "list\t\tshow list of temperature sensors\n" + "get [thermal device name]\tprint temperature" +);