X-Git-Url: https://git.sur5r.net/?a=blobdiff_plain;f=common%2Fcmd_dtt.c;h=5bba12d4d02af5ec9f38d22f397616bf3f9aed1c;hb=1e8ff7145c6be51f295d8e235472a6455aee1ac3;hp=c5b1d4d8fd297f70a9942e5a37432524d288cc8f;hpb=6d0f6bcf337c5261c08fabe12982178c2c489d76;p=u-boot

diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index c5b1d4d8fd..5bba12d4d0 100644
--- a/common/cmd_dtt.c
+++ b/common/cmd_dtt.c
@@ -28,12 +28,16 @@
 #include <dtt.h>
 #include <i2c.h>
 
-int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+static unsigned long sensor_initialized;
+
+int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
 	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 */
 	old_bus = I2C_GET_BUS();
 	I2C_SET_BUS(CONFIG_SYS_DTT_BUS_NUM);
@@ -42,8 +46,16 @@ int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 	 * 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]));
+	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);
+		}
+		printf("DTT%d: %i C\n", i + 1, dtt_get_temp(sensors[i]));
+	}
 
 	/* switch back to original I2C bus */
 	I2C_SET_BUS(old_bus);
@@ -55,6 +67,6 @@ int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
 
 U_BOOT_CMD(
 	  dtt,	1,	1,	do_dtt,
-	  "dtt     - Digital Thermometer and Thermostat\n",
-	  "        - Read temperature from digital thermometer and thermostat.\n"
+	  "Read temperature from Digital Thermometer and Thermostat",
+	  ""
 );