Commit Graph

594 Commits

Author SHA1 Message Date
Jean Delvare
7b501b1f53 hwmon: Discard useless I2C driver IDs
Many I2C hwmon drivers define a driver ID but no other code references
these, meaning that they are useless. Discard them, along with a few
IDs which are defined but never used at all.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
2008-02-07 20:39:44 -05:00
eric miao
b72540c30c deprecate obsolete pca9539 driver
Use drivers/gpio/pca9539.c instead.

Signed-off-by: eric miao <eric.miao@marvell.com>
Acked-by: Ben Gardner <bgardner@wabtec.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Cc: Sam Ravnborg <sam@ravnborg.org>
Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-02-05 09:44:13 -08:00
Benjamin Herrenschmidt
0948391641 PCI: Remove users of pci_enable_device_bars()
This patch converts users of pci_enable_device_bars() to the new
pci_enable_device_{io,mem} interface.

The new API fits nicely, except maybe for the QLA case where a bit of
code re-organization might be a good idea but I prefer sticking to the
simple patch as I don't have hardware to test on.

I'll also need some feedback on the cs5520 change.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-02-01 15:04:27 -08:00
Russell King
c00d4ffdba Merge branch 'orion' into devel
* orion: (26 commits)
  [ARM] Orion: implement power-off method for QNAP TS-109/209
  [ARM] Orion: add support for QNAP TS-109/TS-209
  [ARM] Orion: I2C support
  [I2C] i2c-mv64xxx: Don't set i2c_adapter.retries
  [I2C] Split mv643xx I2C platform support
  [ARM] Orion: enable CONFIG_RTC_DRV_M41T80 for D-Link DNS-323
  [ARM] Orion defconfig
  [ARM] Orion: add support for Orion/MV88F5181 based D-Link DNS-323
  [ARM] Orion: MV88F5181 support bits
  [ARM] Orion: Buffalo/Revogear Kurobox Pro support
  [ARM] OrionNAS RD board support
  [ARM] Orion: support for Marvell Orion-2 (88F5281) Development Board
  [ARM] Orion: common platform setup for Gigabit Ethernet port
  [ARM] Orion: platform device registration for UART, USB and NAND
  [ARM] Orion: system timer support
  [ARM] Orion edge GPIO IRQ support
  [ARM] Orion: IRQ support
  [ARM] Orion: provide GPIO method for enabling hardware assisted blinking
  [ARM] Orion: GPIO support
  [ARM] Orion: programable address map support
  ...

Conflicts:

	arch/arm/Kconfig
	arch/arm/Makefile

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2008-01-28 13:21:30 +00:00
Kalle Pokki
991dee591a i2c-bfin-twi: Register adapter with a specific bus number
All the users of this driver explicitly specify the I2C bus numbers
to be used in their platform data. Make the driver respect that.

Signed-off-by: Kalle Pokki <kalle.pokki@eke.fi>
Cc: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:52 +01:00
Manuel Lauss
8b798c4d16 i2c-au1550: Convert to platform driver
Convert the i2c-au1550 bus driver to platform driver, and
register a platform device for the Alchemy Db/Pb series of
boards.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:52 +01:00
Manuel Lauss
91f27958d6 i2c-au1550: properly terminate zero-byte transfers
Zero-bytes transfers would leave the bus transaction unfinished
(no i2c stop is sent), with the following transfer actually
sending the slave address to the previously addressed device,
resulting in weird device failures (e.g. reset minute register
values in my RTC).
This patch instructs the controller to send an I2C STOP right after
the slave address in case of a zero-byte transfer.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:52 +01:00
Jon Smirl
4bd28ebda2 mpc-i2c: Propagate error values properly
Propagate the error values returned by i2c_wait() instead of overriding
them with a meaningless -1.

Signed-off-by: Jon Smirl <jonsmirl@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:52 +01:00
David Brownell
e9f1373b64 i2c: Add i2c_new_dummy() utility
This adds a i2c_new_dummy() primitive to help work with devices
that consume multiple addresses, which include many I2C eeproms
and at least one RTC.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:52 +01:00
Jean Delvare
0b987dcd3a i2c: Drop legacy locking in i2c_new_probed_device
It is no longer required to hold adapter->clist_lock to call
i2c_check_addr.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
2008-01-27 18:14:52 +01:00
Jean Delvare
9ddced16bb i2c: Limit locking scope in i2c_detach_client
We only need to hold adapter->clist_lock when we touch the client list.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:51 +01:00
David Brownell
86ec5ec872 i2c-remove-redundant-i2c_client-list.patch
This goes on top of the patch removing most i2c_adapter.clients usage,
updating i2c_attach_client:

 - Don't call device_register() while holding clist_lock.  This
   removes a self-deadlock when on the i2c_driver.probe() path,
   for drivers that need to attach new devices (e.g. dummies).

 - Remove a redundant address check.  The driver model core does
   this as a consequence of guaranteeing unique names.

 - Move the "device registered" diagnostic so that it never lies;
   previously, on error paths it would falsely report success.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:51 +01:00
David Brownell
9b766b814d i2c: Stop using the redundant client list
The i2c_adapter.clients list of i2c_client nodes duplicates driver
model state.  This patch starts removing that list, letting us remove
most existing users of those i2c-core lists.

 * The core I2C code now iterates over the driver model's list instead
   of the i2c-internal one in some places where it's safe:
      - Passing a command/ioctl to each client, a mechanims
        used almost exclusively by DVB adapters;
      - Device address checking, in both i2c-core and i2c-dev.

 * Provide i2c_verify_client() to use with driver model iterators.

 * Flag the relevant i2c_adapter and i2c_client fields as deprecated,
   to help prevent new users from appearing.

For the moment the list needs to stick around, since some issues show
up when deleting devices created by legacy I2C drivers.  (They don't
follow standard driver model rules.  Removing those devices can cause
self-deadlocks.)

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:51 +01:00
Jean Delvare
0d227a7e72 i2c-viapro: Add support for the VT8237S
Add support for another variant of the VT8237. I couldn't test
I2C block support but I assume it is present as well.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:51 +01:00
Jean Delvare
9b7389c0ed i2c-piix4: Drop redundant PCI function number check
Checking the PCI function number doesn't add any value, and it makes
adding dynamic IDs to the driver more difficult. Drop this check.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:51 +01:00
Jean Delvare
0f07a24b4b i2c: Let the user specify PCI driver data through new_id
The i2c-amd756 and i2c-viapro drivers make use of the driver_data
field of the PCI device ID. When adding device IDs dynamically (by
writing to the new_id sysfs file) you cannot set the value of this
field by default. It has to be allowed explicitly. Do that, and
check the value so that the user can't crash the kernel accidentally.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-27 18:14:51 +01:00
Mike Rapoport
b7a3670131 i2c-pxa: Add polling transfer
Add polling I2C transfer implementation for PXA I2C. This is needed
for cases where I2C transactions have to occur at times interrups are
disabled.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Acked-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:50 +01:00
Mike Rapoport
cea443a81c i2c: Support i2c_transfer in atomic contexts
Allow i2c_transfer to be called in contexts where sleeping is not allowed.
It is the reponsability of the caller to ensure that the underlying i2c bus
driver will not sleep either.

Signed-off-by: Mike Rapoport <mike@compulab.co.il>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:50 +01:00
Jean Delvare
5271071b20 i2c-sibyte: Remove the bus scan module parameter
The implementation is unsafe, and anyway one can achieve the same from
userspace using i2c-dev + i2cdetect.

Also tag i2c_sibyte_add_bus __init.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
2008-01-27 18:14:50 +01:00
Jean Delvare
6342064cad i2c-i801: Implement I2C block read support
I2C block read is supported since the ICH5. I couldn't get it to work
using the block buffer, so it's using the old-style byte-by-byte mode
for now.

Note: I'm also updating the driver author... The i2c-i801 driver was
really written by Mark Studebaker, even though he based his work on
the i2c-piix4 driver which was written by Philip Edelbrock.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:50 +01:00
Jean Delvare
a0921b6c07 i2c-i801: Clear special mode bits as needed
Clear special mode bits (PEC, block buffer) at driver load time,
you never know in which state the device was left by its last user.

Also make sure that we reset the block buffer mode at the end of every
transaction, not only when PEC was used.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:50 +01:00
Jean Delvare
369f6f4aec i2c-i801: More explicit names for chip features
Use separate flags with explicit names to describe the features of
the ICH chip.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:50 +01:00
Jean Delvare
ae7b0497b8 i2c-i801: Document which chip support what feature
Provide a clearer documentation of which additional features each
ICH chip support, and which of these the driver supports.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:49 +01:00
David Brownell
6d16bfb5e8 i2c/tps65010: move header to <linux/i2c/...>
Move the tps65010 header file from the OMAP arch directory to the
more generic <linux/i2c/...> directory, and remove the spurious
dependency of this driver on OMAP.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:49 +01:00
Jean Delvare
caada32afe i2c: Rename main mutex
Rename the main mutex in i2c-core from core_lists to core_lock. This
makes more sense now that the redundant lists are gone.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:49 +01:00
Jean Delvare
026526f5af i2c: Drop redundant i2c_driver.list
i2c_driver.list is superfluous, this list duplicates the one
maintained by the driver core. Drop it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
2008-01-27 18:14:49 +01:00
Jean Delvare
87c6c22945 i2c: Drop redundant i2c_adapter.list
i2c_adapter.list is superfluous, this list duplicates the one
maintained by the driver core. Drop it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: David Brownell <dbrownell@users.sourceforge.net>
2008-01-27 18:14:48 +01:00
Jean Delvare
e48d33193d i2c: Change prototypes of refcounting functions
Use more standard prototypes for i2c_use_client() and
i2c_release_client(). The former now returns a pointer to the client,
and the latter no longer returns anything. This matches what all other
subsystems do.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
2008-01-27 18:14:48 +01:00
Jean Delvare
bdc511f438 i2c: Use the driver model reference counting
Don't implement our own reference counting mechanism for i2c clients
when the driver model already has one.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
2008-01-27 18:14:48 +01:00
Jean Delvare
0f79b72e45 i2c: Deprecate drivers for I2C buses on video adapters
The framebuffer drivers for these pieces of hardware include support
for the DDC/I2C buses, so there is no need for separate drivers.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:47 +01:00
Jean Delvare
2caeac8104 i2c: Don't uselessly set i2c_adapter.retries
I2C adapter drivers are supposed to handle retries on nack by themselves
if they do, so there's no point in setting .retries if they don't.

As this retry mechanism is going away (at least in its current form),
clean this up now so that we don't get build failures later.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:47 +01:00
Jean Delvare
2cdddeb8d7 i2c: normal_i2c can be made const (remaining drivers)
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:47 +01:00
Mark M. Hoffman
bfb6df24fa i2c: Constify client address data
This patch allows much of the I2C client address data to move from initdata
into text.
    
Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:46 +01:00
Jean Delvare
6408a8338c i2c-algo-pcf: Delete broken 10-bit address support
The 10-bit address support in i2c-algo-pcf is so heavily broken that
it can't have ever been used. Nobody ever complained, so I'll take it
that nobody needs it. Let's just delete it.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:46 +01:00
David Brownell
bf3e2d1d9b i2c-algo-bit: Fix NAK/ARB comments
Update comments and logging on return path for byte writes.  NAK is
an error, to be reported or optionally ignored.  Timeouts are always
errors.  Lost arbitration is not currently handled, so don't even list
it as an option in the error message.

Don't return bogus EFAULT code for inappropriate NAK; EIO is better,
there is no bad userspace address in question.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:46 +01:00
David Brownell
cf978ab284 i2c-algo-bit: Whitespace fixes (+ NAK/ARB comments)
Fix *LOTS* of whitespace goofs and checkpatch.pl warnings, strangely
parenthesized ternary expressions, and other CodingStyle glitches.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:46 +01:00
eric miao
59d70df025 i2c-pxa: Remove hardcoded #ifdef and use cpu_is_pxa27x
remove #ifdef CONFIG_PXA27x .. #endif and use cpu_is_pxaXXXX() macros
so that a single binary can support PXA25x/PXA27x/PXA3xx at run-time.

Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:46 +01:00
Adrian Bunk
7e8b99251b i2c: some overdue driver removal
This patch contains the overdue removal of three I2C drivers.

[JD: In fact only i2c-ixp4xx can be removed at the moment, the other two
platforms don't implement the generic GPIO layer yet.]

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:46 +01:00
Adrian Bunk
eee87d3196 i2c: the scheduled I2C RTC driver removal
This patch contains the scheduled removal of legacy I2C RTC drivers with 
replacement drivers.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:45 +01:00
Jean Delvare
569be443e3 i2c-stub: Use a single array for byte and word operations
This mimics the behavior of actual SMBus chips better.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Mark M. Hoffman <mhoffman@lightlink.com>
2008-01-27 18:14:45 +01:00
Rodolfo Giometti
1b3e5baa88 i2c/tsl2550: Add power management added
Signed-off-by: Rodolfo Giometti <giometti@linux.it>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:45 +01:00
Bart Van Assche
5864ae03ca i2c: Add support for the PCF8575 chip
Signed-off-by: Bart Van Assche <bart.vanassche@gmail.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:45 +01:00
Stefan Roese
217bcec442 i2c-ibm_iic: Whitespace cleanup
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:45 +01:00
Olof Johansson
ccf60d8571 i2c-pasemi: use i2c_add_numbered_adapter()
Use numbered adapter registration to always have the same hardware bus
show up at the same number.

PWRficient 1682M has three buses, they are all on the same PCI device but
different functions. So do the simple thing and register them based on
function number. Future products, if having a different number of busses,
are expected to have similar behaviour w.r.t. device/function layout.

Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-27 18:14:44 +01:00
Jean Delvare
541b6a7a69 i2c-nforce2: The nForce2 can do block transactions
My guess is that all the chips supported by this driver support block
transactions and reset, but for now we play it safe and only list the
ones for which this was actually tested.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Oleg Ryjkov <olegr@olegr.ca>
2008-01-27 18:14:44 +01:00
Jean Delvare
2f0a8df40f [I2C] i2c-mv64xxx: Don't set i2c_adapter.retries
I2C adapter drivers are supposed to handle retries on nack by themselves
if they do, so there's no point in setting .retries if they don't.

As this retry mechanism is going away (at least in its current form),
clean this up now so that we don't get build failures later.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Mark A. Greer <mgreer@mvista.com>
2008-01-26 15:04:01 +00:00
Tzachi Perelstein
a0832798c0 [I2C] Split mv643xx I2C platform support
The motivation for this change is to allow other chips, like the
Marvell Orion ARM SoC family, to use the existing i2c-mv64xxx driver.

Signed-off-by: Tzachi Perelstein <tzachi@marvell.com>
Acked-by: Nicolas Pitre <nico@marvell.com>
Acked-by: Dale Farnsworth <dale@farnsworth.org>
Acked-by: Mark A. Greer <mgreer@mvista.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
2008-01-26 15:03:59 +00:00
Emil Medve
7b8712e563 driver core: Make the dev_*() family of macros in device.h complete
Removed duplicates defined elsewhere

Signed-off-by: Emil Medve <Emilian.Medve@Freescale.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2008-01-24 20:40:08 -08:00
Jean Delvare
5cd6e675f8 i2c-sibyte: Fix an error path
If the registration of the second I2C channel fails, we really want to
unregister the first one before we return with an error.

While we're here, fix the printk right above so that it displays the
real driver name.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Ralf Baechle <ralf@linux-mips.org>
2008-01-14 21:53:31 +01:00
Joe Perches
96acafe05f i2c: Spelling fixes
[JD: One more fix in i2c-dev.]

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-14 21:53:30 +01:00