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| author | Aleksander Morgado <aleksander@aleksander.es> | 2018-08-21 17:18:25 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2018-08-22 09:36:58 +0200 |
| commit | 0657fdc4cdc847c3f3bdc567405c1d115fc54ba2 (patch) | |
| tree | 4bb2239ff0e2bfacb526d1a512a851035ee6da94 | |
| parent | f0624a701513e5444340e7f071ac875d34b39336 (diff) | |
| download | barebox-0657fdc4cdc847c3f3bdc567405c1d115fc54ba2.tar.gz barebox-0657fdc4cdc847c3f3bdc567405c1d115fc54ba2.tar.xz | |
i2c_write: document master send mode
When no explicit start register is given, the i2c message is emitted
in master send mode.
Signed-off-by: Aleksander Morgado <aleksander@aleksander.es>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
| -rw-r--r-- | commands/i2c.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/commands/i2c.c b/commands/i2c.c index f0d16af0cb..57dc092c2f 100644 --- a/commands/i2c.c +++ b/commands/i2c.c @@ -145,8 +145,12 @@ static int do_i2c_write(int argc, char *argv[]) ret = 0; if (verbose) { - printf("wrote %i bytes starting at reg 0x%04x to i2cdev 0x%02x on bus %i\n", - count, reg, addr, adapter->nr); + if (reg >= 0) + printf("wrote %i bytes starting at reg 0x%04x to i2cdev 0x%02x on bus %i\n", + count, reg, addr, adapter->nr); + else + printf("sent %i bytes in master send mode to i2cdev 0x%02x on bus %i\n", + count, addr, adapter->nr); for (i = 0; i < count; i++) printf("0x%02x ", *(buf + i)); printf("\n"); @@ -161,7 +165,7 @@ BAREBOX_CMD_HELP_START(i2c_write) BAREBOX_CMD_HELP_TEXT("Options:") BAREBOX_CMD_HELP_OPT ("-b BUS\t", "i2c bus number (default 0)") BAREBOX_CMD_HELP_OPT ("-a ADDR\t", "i2c device address") -BAREBOX_CMD_HELP_OPT ("-r START", "start register") +BAREBOX_CMD_HELP_OPT ("-r START", "start register (optional, master send mode if none given)") BAREBOX_CMD_HELP_OPT ("-w\t", "use word (16 bit) wide access") BAREBOX_CMD_HELP_OPT ("-v\t", "verbose") BAREBOX_CMD_HELP_END |