[U-Boot] [PATCH 2/3] cmd: thermal: Add command line interface to read out temperatures

[Keerthy]

Add command line interface to read out temperatures from SoC.
Takes two arguments. One is 'temperature' and the other is
instance number. In case instance number is not provided by
default 0th instance temperature is read out.

Signed-off-by: Keerthy <j-keerthy at ti.com>
---
 cmd/Kconfig   |  5 +++++
 cmd/Makefile  |  1 +
 cmd/thermal.c | 59 +++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 65 insertions(+)
 create mode 100644 cmd/thermal.c

diff --git a/cmd/Kconfig b/cmd/Kconfig
index 4bcc5c4557..d252e93d64 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -1044,6 +1044,11 @@ config CMD_SPI
 	help
 	  SPI utility command.
 
+config CMD_THERMAL
+	bool "thermal"
+	help
+	  THERMAL support.
+
 config CMD_TSI148
 	bool "tsi148 - Command to access tsi148 device"
 	help
diff --git a/cmd/Makefile b/cmd/Makefile
index acb85f49fb..2b66f9e36a 100644
--- a/cmd/Makefile
+++ b/cmd/Makefile
@@ -128,6 +128,7 @@ obj-$(CONFIG_CMD_SPI) += spi.o
 obj-$(CONFIG_CMD_STRINGS) += strings.o
 obj-$(CONFIG_CMD_SMC) += smccc.o
 obj-$(CONFIG_CMD_TERMINAL) += terminal.o
+obj-$(CONFIG_CMD_THERMAL) += thermal.o
 obj-$(CONFIG_CMD_TIME) += time.o
 obj-$(CONFIG_CMD_TRACE) += trace.o
 obj-$(CONFIG_HUSH_PARSER) += test.o
diff --git a/cmd/thermal.c b/cmd/thermal.c
new file mode 100644
index 0000000000..a31f992425
--- /dev/null
+++ b/cmd/thermal.c
@@ -0,0 +1,59 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Thermal CMD
+ *
+ * Copyright (C) 2019 Texas Instruments Incorporated - http://www.ti.com/
+ */
+#include <common.h>
+#include <errno.h>
+#include <dm.h>
+#include <dm/uclass-internal.h>
+#include <thermal.h>
+
+#define MAX_TEMP	150
+
+static int do_read_temp(cmd_tbl_t *cmdtp, int flag, int argc,
+			char * const argv[])
+{
+	struct udevice *tdev;
+	int cpu_temp, ret = 0;
+	u8 instance;
+	const char *units;
+
+	if (argc > 2) {
+		printf("Max Number of arguments is 2\n");
+		return -EINVAL;
+	}
+
+	/* In case instance is not given default 0th instnace is reported */
+	if (argc == 2)
+		instance = (u8)simple_strtoul(argv[1], NULL, 10);
+	else
+		instance = 0;
+
+	ret = uclass_get_device(UCLASS_THERMAL, 0, &tdev);
+	if (!ret) {
+		ret = thermal_get_temp(tdev, instance, &cpu_temp);
+		if (!ret) {
+			if (abs(cpu_temp) < MAX_TEMP)
+				units = "C";
+			else
+				units = "mC";
+
+			printf("Instance %d Temperature at %d%s\n", instance,
+			       cpu_temp, units);
+		} else {
+			debug(" - invalid sensor data\n");
+		}
+	} else {
+		printf(" - invalid sensor device\n");
+	}
+
+	return ret;
+}
+
+U_BOOT_CMD(
+	temperature, 2, 0, do_read_temp,
+	"Reads temperature of a given sensor",
+	" [sensor number] - number of the temperature sensor"
+);
-- 
2.17.1