Add an option -h to display the help of the tools. This is a common
practice so users may expect it to work.
Based on a preliminary patch from David Kerns.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Use the standard C getopt() function instead of parsing the options
manually. The benefit of this move is that getopt() supports merged
flags (for example -fy instead of -f -y) and does not require options
to come first on the command line. As this is pretty standard by now,
not supporting such possibilities can confuse and disappoint the user.
Based on a preliminary patch from David Kerns.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This reverts commit 34806fc4e7. It was
developed against an experimental kernel. The regular kernel does not
update the new message length to userspace, so the check is always false
positive. We can't change the kernel behaviour because it would break
the ABI. So revert this commit.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Signed-off-by: Wolfram Sang <wsa@kernel.org>
Emit a warning if the bus master driver in the kernel did not set the
message length correctly with I2C_M_RECV_LEN. This can be determined
from the returned value in the buffer.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
We now have the flag '-a' for all i2c-tools to allow access for all
addresses. This was tied in i2ctransfer to the '-f' flag. Remove it and
keep that feature to '-a' only. This is also more in sync with the other
i2c-tools which use '-f' only to access already busy devices.
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Reviewed-by: Peter Rosin <peda@axentia.se>
If the user is sure that the reserved 0x00 - 0x02 and 0x77 - 0x7f ranges
are not needed by its devices, then the "-a" option can be passed for
allowing all theorical addresses to be used. It is then possible to
access devices in this address range.
Signed-off-by: Romain Porte <romain.porte@nokia.com>
Reviewed-by: Peter Rosin <peda@axentia.se>
[wsa: imonr fixes to commit message]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Probably because of a bad rebase, the old and bogus handling (v1) of "force"
slipped into the latest version of the patch (v3). Apply the better
version from v2 which does the error handling correct and makes the code
a lot easier to understand.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
This tool allows to construct and concat multiple I2C messages into one
single transfer. Its aim is to test I2C master controllers, and so there
is no SMBus fallback.
I've been missing such a tool a number of times now, so I finally got
around to writing it myself. As with all I2C tools, it can be dangerous,
but it can also be very useful when developing.
It has been tested with various Renesas I2C IP cores as well as Tegra,
i.MX and AT91.
Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
[wsa: fixed two more typos and ugly linebreak]
Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
Jean Delvare
Wolfram Sang
Wolfram Sang
Romain Porte