i2c: Constify i2c_algorithm declarations, part 1
Make struct i2c_algorithm declarations const in all i2c algorithm
drivers.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-viapro: Add support for the VT8237A and VT8251
Documentation update included. Compile tested.
Signed-off-by: Rudolf Marek <r.marek@sh.cvut.cz>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c: Warn on i2c client creation failure
Warn when an i2c client creation fails. If we don't, the user will
never know something wrong happened, as i2c client creation is
typically called through an attach_adapter callback, those return value
we currently ignore for technical reasons.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-core: Drop useless bitmaskings
The code generated is exactly the same.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-algo-pcf: Discard the mdelay data struct member
Just as i2c-algo-bit, i2c-algo-pcf has an unused mdelay struct member,
which we can get rid of to spare some code and memory.
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-algo-bit: Cleanups
* Uninline long functions (saves around 1 kB or 15%)
* Refactor code in sclhi()
* Drop redundant udelay on repeated start
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c: __must_check fixes (chip drivers)
Check for error on sysfs file creation.
Delete sysfs files on device removal.
The approach taken for the most complex case (pcf8591) is similar to
what Mark M. Hoffman proposed for hardware monitoring chip drivers.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Ben Gardner <bgardner@wabtec.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-dev: attach/detach_adapter cleanups
* Only print that an adapter was attached when it succeeds.
* i2c_dev == NULL on detach simply means that the attach failed
before, this isn't an error per se.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-stub: Chip address as a module parameter
Add a mandatory chip_addr parameter to i2c-stub. This parameter
defines to which chip address the driver will respond, instead of
reponding to all addresses as before. The idea is to prevent the
users from loading i2c-stub at random and being then confused by
the results of sensors-detect or other user-space tools.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c: New bus driver for TI OMAP boards
This patch adds I2C bus driver for various Texas
Instruments (TI) OMAP1/2 (http://www.ti.com/omap) series
based boards like OMAP1510/1610/1710/242x.
Signed-off-by: Komal Shah <komal_shah802003@yahoo.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-algo-bit: Discard the mdelay data struct member
The i2c_algo_bit_data structure has an mdelay member, which is not
used by the algorithm code (the code has always been ifdef'd out.)
Let's discard it to save some code and memory.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Mauro Carvalho Chehab <mchehab@brturbo.com.br>
Cc: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c: Fix copy-n-paste in subsystem Kconfig
We have:
drivers/i2c/Kconfig:2:# Character device configuration
Which is obviously not true..
Signed-off-by: Arthur Othieno <apgo@patchbomb.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-au1550: Add SMBus functionality flag
Add SMBus functionality flag, so we can use eeprom and similar
drivers.
Signed-off-by: Domen Puncer <domen.puncer@ultra.si>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-au1550: Fix timeout problem
Fix from Jordan Crouse:
If the transmit and recieve FIFOS are not empty, forceably flush them
rather then waiting for them to drain on their own.
This solves at least a problem reported by Clem Taylor:
http://www.linux-mips.org/archives/linux-mips/2006-05/msg00240.html
(1% of I2C transactions would timeout)
Signed-off-by: Domen Puncer <domen.puncer@ultra.si>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-sibyte: Kip Walker is gone
Kip Walker no longer works at Broadcom, and his e-mail address there
bounces back, so let's drop it.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-algo-sibyte: Merge into i2c-sibyte
Merge i2c-algo-sibyte into i2c-sibyte, as this is a complete,
hardware-dependent SMBus implementation and not a reusable algorithm.
Perform some basic coding style cleanups while we're here (mainly
space-based indentation replaced by tabulations.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c: __must_check fixes (i2c-dev)
Check for error on sysfs file creation.
Check for error on device creation.
Delete sysfs file on device destruction.
I couldn't test this one beyond compilation, as it applies on top of
another patch in Greg's tree [1] which breaks all my systems when I
apply it (my udev isn't recent enough.) Anyone with bleeding edge udev
is welcome to test and report.
[1] http://www.kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/patches/i2c/i2c-dev-device.patch
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c: __must_check fixes (core drivers)
Check for error on sysfs file creation.
Check for error on device registration.
Check for error on class device registration.
Greg, I am not familiar with completion, can you please tell me if I
need to take care of it in the error paths (as I did in this patch,
see /* Needed? */ comments), or if it isn't needed?
These patches were tested, including forced errors, so they should work
fine. But of course more testing can't hurt.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-dev: Drop the client template
Drop the i2c-dev client template. This saves about 360 bytes of
memory. I got the idea from a similar cleanup Hans-Frieder Vogt
made to i2c-nforce2 recently.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-dev: Use a list for data storage
Use a list instead of a static array for storing the i2c-dev data.
Given that most systems have less than 10 i2c busses, most of the
space was wasted, so this saves around 1 kB of memory (2 kB on 64-bit
archs.)
The drawback is that lookup was in O(1) and is now in O(N), but given
that the values of N are always small, I don't think this is a problem.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-dev: Cleanups
* We no more need to include platform_device.h.
* Delete the to_i2c_dev macro, which is no more used (and no more valid
either.)
* Drop i2c_dev.minor. Now that the minor number always matches the i2c
adapter number, this field is redundant with i2c_dev.adap->nr.
* Delete i2c_dev_get_by_adapter() which is now redundant with
i2c_dev_get_by_minor() for the same reason.
* Drop the local variable dev in i2cdev_attach_adapter(), we can
easily do without it.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The tps65010.c driver in the main tree never got updated with
build fixes since the last batch of I2C driver changes; and the
genirq trigger flags were updated wierdly too.
This also includes a minor tweak to reduce the frequency used to
poll for unplug-the-AC-power on the TPS chips that don't provide
relevant IRQs. It _would_ be nice to sense whether there's even
a battery, but that'd normally be an HDQ/1-wire interface to a
smart battery, and such APIs aren't standardized.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
While busy-waiting for completion, check the hardware after scheduling;
don't schedule and then immediately check the _timeout_. If the yield()
took a long time (as it does on my OLPC prototype board when it's busy),
we'd report a timeout even though the hardware was now ready.
This fixes it, and also switches the yield() for a cond_resched() because
we don't actually want to be _that_ nice about it. I see nice
tightly-packed SMBus transactions now, rather than waiting for milliseconds
between successive phases.
Actually, we shouldn't be busy-waiting here at all. We should be using
interrupts. That's an exercise for another day though.
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Cc: Christer Weinigel <wingel@nano-system.com>
Cc: <Jordan.Crouse@amd.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Now that get_property() returns a void *, there's no need to cast its
return value. Also, treat the return value as const, so we can
constify get_property later.
powermac platform & macintosh driver changes.
Built for pmac32_defconfig, g5_defconfig
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
The pca9539 driver doesn't honor the force parameter; it always does
detection. This patch will skip detection if forced.
Signed-off-by: Ben Gardner <gardner.ben@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Content-Disposition: inline; filename=i2c-algo-error-handling-fix.patch
It is possible for i2c_add_adapter() to fail. Several I2C algorithm
drivers ignore that fact. This (compile-tested only) patch fixes them.
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Fix the value returned by the i2c-powermac's master_xfer method.
It should return the number of messages processed successfully, but
instead returns the number of data bytes in the first (and only)
processed message.
Also explicitly mention the master_xfer convention so that future
implementations get it right directly.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The scx200_acb i2c bus driver pretends to support SMBus block
transactions, but in fact it implements the more simple I2C block
transactions. Additionally, it lacks sanity checks on the length
of the block transactions, which could lead to a buffer overrun.
This fixes an oops reported by Alexander Atanasov:
http://marc.theaimsgroup.com/?l=linux-kernel&m=114970382125094
Thanks to Ben Gardner for fixing my bugs :)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Fix the scx200_acb state machine:
* Nack was sent one byte too late on reads >= 2 bytes.
* Stop bit was set one byte too late on reads.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Avoid addressing self when sending a slave address. Follows instruction
in Intel 80331/80321 manuals.
Ignoring this worked previously on 80321, but causes a hang on i2cdetect
on 80331.
Signed-off-by: Peter Milne <peter.milne@d-tacq.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
This patch fixes a bug in the handling of 'ignore' module parameters of I2C
client drivers.
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
drivers/i2c/busses/i2c-i801.c: In function 'i801_probe':
drivers/i2c/busses/i2c-i801.c:496: warning: format '%lx' expects type 'long unsigned int', but argument 5 has type 'resource_size_t'
Cc: Greg KH <greg@kroah.com>
Cc: Vivek Goyal <vgoyal@in.ibm.com>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Commit 02dd7ae289 ("[PATCH] i2c-i801:
Merge setup function") has a missing return 0 in the _probe() function.
This means the error path is always executed and pci_disable_device() is
called even when the device just got successfully enabled.
Having the SMBus device disabled makes some systems (eg.
Fujitsu-Siemens Lifebook E8010) hang hard during power-off.
Intead of reverting the whole commit this patch fixes it up:
- don't ever call pci_disable_device(), also not in the _remove() function
to avoid hangs
- fix missing pci_release_region() in error path
Signed-off-by: Daniel Ritz <daniel.ritz@gmx.ch>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
I2C creates some sysfs nodes in the wrong places: not as children of parent
controllers, but as their peers (!). This puts them into the right place
always, instead of just when the adapter is on the platform bus.
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-i801: Merge setup function
Merge i801_setup into i801_probe, as it doesn't make much sense to
have them split. This lets us handle errors better. Christopher
Hellwig had been suggesting this back in March 2003 when the driver
was merged.
Also drop two useless debug messages (revision and base address can be
obtained from lspci, procfs or sysfs.)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-i801: Better pci subsystem integration
Integrate the i2c-i801 driver better with the pci subsystem, by
calling pci_{enable,disable}_device and requesting the I/O region
by BAR rather than direct configuration space access.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-i801: Cleanups
Various cleanups to the i2c-i801 driver:
* Fix documentation file and self file name references.
* i801_setup can be marked __devinit.
* Drop useless error local variable and label in i801_setup.
* Avoid a double PCI configuration register write in some cases.
* Use symbolic names for SMBHSTCFG bits.
* Transmit the error code returned by i801_setup instead of forcing it
to an arbitrary value.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-i801: Remove PCI function check
Remove the PCI function number check when probing devices.
This check is redundant, each function has a separate PCI device
ID, so checking for that ID is sufficient.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-i801: Remove force_addr parameter
Remove the force_addr module parameter. It doesn't appear to ever
have been needed, and PCI resources shouldn't be arbitrarily
changed anyway.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
i2c-i801: Fix block transaction poll loops
Two of the three poll loops have the poll and sleep swapped,
causing an extra sleep to occur after the polled condition is
fulfilled. In practice, this doubles the amount of sleep time for
every block transaction.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
In i2c bus driver scx200_acb, function scx200_acb_probe can be
tagged __init.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
On the CS5535 and CS5536, the I/O resource is allocated through PCI,
so use that instead of using the MSR backdoor.
Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
The attached patch marks i2c_smbus_write_block_data() and
i2c_smbus_write_i2c_block_data() buffers as const.
Signed-off-by: Krzysztof Halasa <khc@pm.waw.pl>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Minor cleanup to the i2c-ocores driver.
Peter Korsgaard will maintain the i2c-ocores driver.
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Jean Delvare