1 files changed, 119 insertions, 0 deletions
diff --git a/cmd/dtt.c b/cmd/dtt.c
new file mode 100644
index 0000000000..f2e750f2f1
--- /dev/null
+++ b/cmd/dtt.c
@@ -0,0 +1,119 @@
+/*
+ * (C) Copyright 2001
+ * Erik Theisen, Wave 7 Optics, etheisen@mindspring.com
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <config.h>
+#include <command.h>
+
+#include <dtt.h>
+#include <i2c.h>
+#include <tmu.h>
+
+#if defined CONFIG_DTT_SENSORS
+static unsigned long sensor_initialized;
+
+static void _initialize_dtt(void)
+{
+	int i;
+	unsigned char sensors[] = CONFIG_DTT_SENSORS;
+
+	for (i = 0; i < sizeof(sensors); i++) {
+		if ((sensor_initialized & (1 << i)) == 0) {
+			if (dtt_init_one(sensors[i]) != 0) {
+				printf("DTT%d: Failed init!\n", i);
+				continue;
+			}
+			sensor_initialized |= (1 << i);
+		}
+	}
+}
+
+void dtt_init(void)
+{
+	int old_bus;
+
+	/* switch to correct I2C bus */
+	old_bus = I2C_GET_BUS();
+	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
+
+	_initialize_dtt();
+
+	/* switch back to original I2C bus */
+	I2C_SET_BUS(old_bus);
+}
+#endif
+
+int dtt_i2c(void)
+{
+#if defined CONFIG_DTT_SENSORS
+	int i;
+	unsigned char sensors[] = CONFIG_DTT_SENSORS;
+	int old_bus;
+
+	/* Force a compilation error, if there are more then 32 sensors */
+	BUILD_BUG_ON(sizeof(sensors) > 32);
+	/* switch to correct I2C bus */
+#ifdef CONFIG_SYS_I2C
+	old_bus = i2c_get_bus_num();
+	i2c_set_bus_num(CONFIG_SYS_DTT_BUS_NUM);
+#else
+	old_bus = I2C_GET_BUS();
+	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
+#endif
+
+	_initialize_dtt();
+
+	/*
+	 * Loop through sensors, read
+	 * temperature, and output it.
+	 */
+	for (i = 0; i < sizeof(sensors); i++)
+		printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
+
+	/* switch back to original I2C bus */
+#ifdef CONFIG_SYS_I2C
+	i2c_set_bus_num(old_bus);
+#else
+	I2C_SET_BUS(old_bus);
+#endif
+#endif
+
+	return 0;
+}
+
+int dtt_tmu(void)
+{
+#if defined CONFIG_TMU_CMD_DTT
+	int cur_temp;
+
+	/* Sense and return latest thermal info */
+	if (tmu_monitor(&cur_temp) == TMU_STATUS_INIT) {
+		puts("TMU is in unknown state, temperature is invalid\n");
+		return -1;
+	}
+	printf("Current temperature: %u degrees Celsius\n", cur_temp);
+#endif
+	return 0;
+}
+
+int do_dtt(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+{
+	int err = 0;
+
+	err |= dtt_i2c();
+	err |= dtt_tmu();
+
+	return err;
+}	/* do_dtt() */
+
+/***************************************************/
+
+U_BOOT_CMD(
+	  dtt,	1,	1,	do_dtt,
+	  "Read temperature from Digital Thermometer and Thermostat",
+	  ""
+);