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| author | Alexander Shiyan <shc_work@mail.ru> | 2020-11-04 06:59:28 +0300 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2020-11-09 08:50:35 +0100 |
| commit | 9c26bdabd8dd4dc3aa52513c02dce2a8741d45b0 (patch) | |
| tree | 38260a5d7b149ec824fa9f52efb8da9260abb003 /commands | |
| parent | b7c83c6bf2c5a6e4d9289a3c458843b90ba2b32a (diff) | |
| download | barebox-9c26bdabd8dd4dc3aa52513c02dce2a8741d45b0.tar.gz barebox-9c26bdabd8dd4dc3aa52513c02dce2a8741d45b0.tar.xz | |
i2c_probe: Use "read_byte" command for probing
Some I2C adapters do not allow zero length data transfers, such as the AM335X.
To use the i2c_probe command, let's use byte reading for this purpose.
Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands')
| -rw-r--r-- | commands/i2c.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/commands/i2c.c b/commands/i2c.c index 53f36dfaab..997d49a949 100644 --- a/commands/i2c.c +++ b/commands/i2c.c @@ -16,10 +16,12 @@ static void i2c_probe_range(struct i2c_adapter *adapter, int startaddr, int stop printf("probing i2c%d range 0x%02x-0x%02x: ", adapter->nr, startaddr, stopaddr); for (addr = startaddr; addr <= stopaddr && !ctrlc(); addr++) { + u8 buf[1]; struct i2c_msg msg = { .addr = addr, - .buf = NULL, - .len = 0, + .buf = buf, + .len = sizeof(buf), + .flags = I2C_M_RD, }; int ret = i2c_transfer(adapter, &msg, 1); if (ret == 1) |