[PATCH] I2C: Add support for multiple I2C busses for RTC & DTT
This patch switches to the desired I2C bus when the date/dtt
commands are called. This can be configured using the
CFG_RTC_BUS_NUM and/or CFG_DTT_BUS_NUM defines.
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/common/cmd_date.c b/common/cmd_date.c
index 84932f7..33d2e56 100644
--- a/common/cmd_date.c
+++ b/common/cmd_date.c
@@ -27,6 +27,7 @@
#include <common.h>
#include <command.h>
#include <rtc.h>
+#include <i2c.h>
DECLARE_GLOBAL_DATA_PTR;
@@ -44,6 +45,11 @@
{
struct rtc_time tm;
int rcode = 0;
+ int old_bus;
+
+ /* switch to correct I2C bus */
+ old_bus = I2C_GET_BUS();
+ I2C_SET_BUS(CFG_RTC_BUS_NUM);
switch (argc) {
case 2: /* set date & time */
@@ -56,7 +62,7 @@
/* insert new date & time */
if (mk_date (argv[1], &tm) != 0) {
puts ("## Bad date format\n");
- return 1;
+ break;
}
/* and write to RTC */
rtc_set (&tm);
@@ -71,11 +77,15 @@
"unknown " : RELOC(weekdays[tm.tm_wday]),
tm.tm_hour, tm.tm_min, tm.tm_sec);
- return 0;
+ break;
default:
printf ("Usage:\n%s\n", cmdtp->usage);
rcode = 1;
}
+
+ /* switch back to original I2C bus */
+ I2C_SET_BUS(old_bus);
+
return rcode;
}
diff --git a/common/cmd_dtt.c b/common/cmd_dtt.c
index 9db64e9..4f7b049 100644
--- a/common/cmd_dtt.c
+++ b/common/cmd_dtt.c
@@ -28,19 +28,27 @@
#if (CONFIG_COMMANDS & CFG_CMD_DTT)
#include <dtt.h>
+#include <i2c.h>
int do_dtt (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
{
int i;
unsigned char sensors[] = CONFIG_DTT_SENSORS;
+ int old_bus;
+
+ /* switch to correct I2C bus */
+ old_bus = I2C_GET_BUS();
+ I2C_SET_BUS(CFG_DTT_BUS_NUM);
/*
* Loop through sensors, read
* temperature, and output it.
*/
- for (i = 0; i < sizeof (sensors); i++) {
+ 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 */
+ I2C_SET_BUS(old_bus);
return 0;
} /* do_dtt() */
