diff options
| -rw-r--r-- | common/cmd_i2c.c | 20 |
1 files changed, 16 insertions, 4 deletions
diff --git a/common/cmd_i2c.c b/common/cmd_i2c.c index b59470e7f6..82e63e1322 100644 --- a/common/cmd_i2c.c +++ b/common/cmd_i2c.c @@ -605,18 +605,28 @@ mod_i2c_mem(cmd_tbl_t *cmdtp, int incrflag, int flag, int argc, char * const arg /* * Syntax: - * i2c probe {addr}{.0, .1, .2} + * i2c probe {addr} + * + * Returns zero (success) if one or more I2C devices was found */ static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) { int j; + int addr = -1; + int found = 0; #if defined(CONFIG_SYS_I2C_NOPROBES) int k, skip; uchar bus = GET_BUS_NUM; #endif /* NOPROBES */ + if (argc == 2) + addr = simple_strtol(argv[1], 0, 16); + puts ("Valid chip addresses:"); for (j = 0; j < 128; j++) { + if ((0 <= addr) && (j != addr)) + continue; + #if defined(CONFIG_SYS_I2C_NOPROBES) skip = 0; for (k=0; k < NUM_ELEMENTS_NOPROBE; k++) { @@ -628,8 +638,10 @@ static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv if (skip) continue; #endif - if (i2c_probe(j) == 0) + if (i2c_probe(j) == 0) { printf(" %02X", j); + found++; + } } putc ('\n'); @@ -642,7 +654,7 @@ static int do_i2c_probe (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv putc ('\n'); #endif - return 0; + return (0 == found); } /* @@ -1380,7 +1392,7 @@ U_BOOT_CMD( "i2c mm chip address[.0, .1, .2] - write to I2C device (auto-incrementing)\n" "i2c mw chip address[.0, .1, .2] value [count] - write to I2C device (fill)\n" "i2c nm chip address[.0, .1, .2] - write to I2C device (constant address)\n" - "i2c probe - show devices on the I2C bus\n" + "i2c probe [address] - test for and show device(s) on the I2C bus\n" "i2c read chip address[.0, .1, .2] length memaddress - read to memory \n" "i2c write memaddress chip address[.0, .1, .2] length - write memory to i2c\n" "i2c reset - re-init the I2C Controller\n" |