Heiko Schocher wrote:
If I2C Bus is blocked (see doc/I2C_Edge_Conditions), it is not possible to get out of this, until the complete Hardware gets a reset. This new commando
You mean a commando like Chuck Norris? Seriously, you use this word in a lot of these patches and it's not quite appropriate.
calls again i2c_init (and that calls i2c_init_board if defined), which will deblock the I2C Bus.
Signed-off-by: Heiko Schocher hs@denx.de
common/cmd_i2c.c | 9 +++++++++ 1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index ea80e8a..c0afd11 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -1182,6 +1182,12 @@ int do_sdram (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) #endif
#if defined(CONFIG_I2C_CMD_TREE) +int do_i2c_reset(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) +{
- i2c_init (CFG_I2C_SPEED, CFG_I2C_SLAVE);
- return 0;
+}
#if defined(CONFIG_I2C_MULTI_BUS) int do_i2c_bus_num(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) { @@ -1238,6 +1244,8 @@ int do_i2c(cmd_tbl_t * cmdtp, int flag, int argc, char *argv[]) return do_i2c_crc(cmdtp, flag, --argc, ++argv); if (!strncmp(argv[1], "pr", 2)) return do_i2c_probe(cmdtp, flag, --argc, ++argv);
- if (!strncmp(argv[1], "re", 2))
return do_i2c_reset(cmdtp, flag, --argc, ++argv);#if defined(CONFIG_CMD_SDRAM) @@ -1266,6 +1274,7 @@ U_BOOT_CMD( "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n" "i2c crc32 chip address[.0, .1, .2] count - compute CRC32 checksum\n" "i2c probe - show devices on the I2C bus\n"
- "i2c reset - reinit the I2C Controller\n"
re-init or re-initialize would be better.
"i2c loop chip address[.0, .1, .2] [# of objects] - looping read of device\n" #if defined(CONFIG_CMD_SDRAM) "i2c sdram chip - print SDRAM configuration information\n"
regards, Ben