13 Apr, 2009
1 commit
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While it isn't the way the standard device binding model works, it is
OK for new-style drivers to implement attach_adapter. It may help
convert the renaming legacy drivers to new style drivers faster.Signed-off-by: Jean Delvare
Cc: David Brownell
29 Mar, 2009
3 commits
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Some lines over 80.
The printk(KERN_ERR ... ) should be dev_err.
And some blankspace should be deleted.Signed-off-by: Zhenwen Xu
Signed-off-by: Jean Delvare -
Setting a default timeout value on a per-algo basis doesn't make any
sense. Move the default value setting to i2c-core. Individual adapter
drivers can specify a different (non-zero) value if they wish.Also express the timeout value in a way which results in the same
duration regarless of the value of HZ.Signed-off-by: Jean Delvare
Acked-by: Wolfram Sang -
The automatic removal of i2c clients only affects the clients which
were created automatically in the first place. Add a comment saying
that to avoid any confusion.Signed-off-by: Jean Delvare
25 Mar, 2009
1 commit
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This patch implements uevent suppress in kobject and removes it
from struct device, based on the following ideas:1,Uevent sending should be one attribute of kobject, so suppressing it
in kobject layer is more natural than in device layer. By this way,
we can do it for other objects embedded with kobject.2,It may save several bytes for each instance of struct device.(On my
omap3(32bit ARM) based box, can save 8bytes per device object)This patch also introduces dev_set|get_uevent_suppress() helpers to
set and query uevent_suppress attribute in case to help kobject
as private part of struct device in future.[This version is against the latest driver-core patch set of Greg,please
ignore the last version.]Signed-off-by: Ming Lei
Signed-off-by: Greg Kroah-Hartman
25 Feb, 2009
1 commit
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Fix misplaced parentheses.
Signed-off-by: Roel Kluin
Signed-off-by: Jean Delvare
07 Jan, 2009
1 commit
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This patch is part of a larger patch series which will remove
the "char bus_id[20]" name string from struct device. The device
name is managed in the kobject anyway, and without any size
limitation, and just needlessly copied into "struct device".To set and read the device name dev_name(dev) and dev_set_name(dev)
must be used. If your code uses static kobjects, which it shouldn't
do, "const char *init_name" can be used to statically provide the
name the registered device should have. At registration time, the
init_name field is cleared, to enforce the use of dev_name(dev) to
access the device name at a later time.We need to get rid of all occurrences of bus_id in the entire tree
to be able to enable the new interface. Please apply this patch,
and possibly convert any remaining remaining occurrences of bus_id.We want to submit a patch to -next, which will remove bus_id from
"struct device", to find the remaining pieces to convert, and finally
switch over to the new api, which will remove the 20 bytes array
and does no longer have a size limitation.Acked-by: Greg Kroah-Hartman
Signed-off-by: Kay Sievers
Signed-off-by: Jean Delvare
28 Nov, 2008
1 commit
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i2c clients should be removed in reverse order compared to the probe
(actually: bind) order. This matters when several clients depend on
each other.Signed-off-by: Jean Delvare
Tested-by: Guennadi Liakhovetski
23 Oct, 2008
1 commit
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If present the info->archdata is copied into the dev->archdata.
Some (OpenFirmware) platforms need it.Signed-off-by: Anton Vorontsov
Signed-off-by: Jean Delvare
14 Oct, 2008
3 commits
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Restore the i2c_smbus_process_call() as one driver (for the
Micronas MAP5401) will need it soon.[JD: Update documentation accordingly.]
Signed-off-by: Prakash Mortha
Signed-off-by: Jean Delvare -
Move I2C driver model init earlier in the boot sequence.
This avoids oopsing in statically linked systems when some
subsystems register I2C drivers in subsys_initcall() code,
but those subsystems are linked (and initialized) before I2C.Signed-off-by: David Brownell
Signed-off-by: Jean Delvare -
Guard I2C against oopsing because of init sequence problems, by
verifying that i2c_init() has been called before calling any
routines that rely on that initialization. This specific test
just requires that bus_register(&i2c_bus_type) was called.Examples of this kind of oopsing come from subystems and drivers
which register I2C drivers in their subsys_initcall code but
which are statically linked before I2C by drivers/Makefile.Signed-off-by: David Brownell
Signed-off-by: Jean Delvare
28 Aug, 2008
2 commits
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Some DVB adapters do not support the special I2C transaction that we
use for probing purposes. There's no point in logging this event, as
there's nothing the user can do and in general there is no actual
problem. So, degrade one of these messages to a debug message, and
move the other one around so that it is only printed on bogus drivers.Signed-off-by: Jean Delvare
Acked-by: Uwe Bugla -
device_init_wakeup must be called after device_register.
Signed-off-by: Marc Pignat
Acked-by: David Brownell
Signed-off-by: Jean Delvare
11 Aug, 2008
2 commits
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We check for address business in i2c_probe_address(),
i2c_detect_address() and i2c_new_probed_device(), but this isn't
sufficient. Drivers can call i2c_attach_client() and
i2c_new_device() on any address, so we must check the address there
as well.This fixes bug #11239:
http://bugzilla.kernel.org/show_bug.cgi?id=11239Signed-off-by: Jean Delvare
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Fix a NULL pointer dereference that happened when calling
i2c_new_probed_device on one of the addresses for which we use byte
reads instead of quick write for detection purpose (that is: 0x30-0x37
and 0x50-0x5f).Signed-off-by: Hans Verkuil
Signed-off-by: Jean Delvare
22 Jul, 2008
1 commit
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This mirrors the functionality that driver_for_each_device has as well.
We add a start variable, and all callers of the function are fixed up at
the same time.The block layer will be using this new functionality in a follow-on
patch.Cc: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
17 Jul, 2008
1 commit
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Clear i2c_adapter.dev on adapter removal. This makes it possible to
re-add the adapter at a later point, which some drivers
(i2c-amd756-s4882, i2c-nforce2-s4985) actually do.This fixes a bug reported by John Stultz here:
http://lkml.org/lkml/2008/7/15/720
and by Ingo Molar there:
http://lkml.org/lkml/2008/7/16/78Signed-off-by: Jean Delvare
Cc: John Stultz
Cc: Ingo Molnar
15 Jul, 2008
12 commits
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Add a mechanism to let new-style i2c drivers optionally autodetect
devices they would support on selected buses and ask i2c-core to
instantiate them. This is a replacement for legacy i2c drivers, much
cleaner.Where drivers had to implement both a legacy i2c_driver and a
new-style i2c_driver so far, this mechanism makes it possible to get
rid of the legacy i2c_driver and implement both enumerated and
detected device support with just one (new-style) i2c_driver.Here is a quick conversion guide for these drivers, step by step:
* Delete the legacy driver definition, registration and removal.
Delete the attach_adapter and detach_client methods of the legacy
driver.* Change the prototype of the legacy detect function from
static int foo_detect(struct i2c_adapter *adapter, int address, int kind);
to
static int foo_detect(struct i2c_client *client, int kind,
struct i2c_board_info *info);* Set the new-style driver detect callback to this new function, and
set its address_data to &addr_data (addr_data is generally provided
by I2C_CLIENT_INSMOD.)* Add the appropriate class to the new-style driver. This is
typically the class the legacy attach_adapter method was checking
for. Class checking is now mandatory (done by i2c-core.) See
for the list of available classes.* Remove the i2c_client allocation and freeing from the detect
function. A pre-allocated client is now handed to you by i2c-core,
and is freed automatically.* Make the detect function fill the type field of the i2c_board_info
structure it was passed as a parameter, and return 0, on success. If
the detection fails, return -ENODEV.Signed-off-by: Jean Delvare
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We call adapter->client_register for both legacy and new-style i2c
devices, however we only call adapter->client_unregister for legacy
drivers. This doesn't make much sense. Usually, drivers will undo
in client_unregister what they did in client_register, so we should
call neither or both for every given i2c device.In order to ease the transition from legacy to new-style devices, it
seems preferable to actually call both.Signed-off-by: Jean Delvare
Cc: David Brownell -
Export the root of the i2c bus so that PowerPC device tree code can
iterate over devices on the i2c bus.Signed-off-by: Jon Smirl
Signed-off-by: Jean Delvare -
i2c_driver.id_table is mandatory now, so we can simplify
i2c_device_probe() a bit.Signed-off-by: Jean Delvare
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i2c_del_driver() can be simplified a bit.
Signed-off-by: Jean Delvare
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Use list_for_each_entry_safe() in i2c_del_adapter() and i2c_del_driver().
Signed-off-by: Matthias Kaehlcke
Signed-off-by: Jean Delvare -
Defend the i2c refcount calls against NULL pointers, as is important
(and conventional) for such calls. Note that none of the current
callers of i2c_use_client() use its return value.[JD: I hate this but apparently all the other subsystems do it so...]
Signed-off-by: David Brownell
Signed-off-by: Jean Delvare -
Provide kerneldoc for most of the I2C and SMBus I/O calls. Add a
comment summarizing some fault reporting issues which affect the
ability to provide clean fault reports through I2C master transfer
calls. (Making it hard to precisely specify their return values...)Signed-off-by: David Brownell
Signed-off-by: Jean Delvare -
Function i2c_smbus_write_quick has no users left, so we can delete it.
Also update the list of these helper functions which are gone but
could be added back if needed.Signed-off-by: Jean Delvare
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More updates to the I2C stack's fault reporting: make the core stop
returning "-1" (usually "-EPERM") for all faults. Instead, pass lower
level fault code up the stack, or return some appropriate errno.This patch happens to touch almost exclusively SMBus calls.
Signed-off-by: David Brownell
Signed-off-by: Jean Delvare -
i2c-core doesn't use seq files, so doesn't need to include
.Signed-off-by: Jean Delvare
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Use class_for_each_device for iteration.
Signed-off-by: Dave Young
Signed-off-by: Jean Delvare
19 May, 2008
1 commit
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Remove the old driver_name/type scheme for i2c driver matching. Only the
standard aliasing model will be used from now on.Signed-off-by: Jean Delvare
12 May, 2008
1 commit
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As the old driver_name/type matching scheme is going away soon, change
the dummy device mechanism to use the new matching scheme.This has the downside that dummy i2c clients can no longer choose
their name, they'll all appear as "dummy" in sysfs and in log
messages. I don't think it is a problem in practice though, as there
is little reason to use these i2c clients to log messages.Signed-off-by: Jean Delvare
30 Apr, 2008
1 commit
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Based on earlier work by Jon Smirl and Jochen Friedrich.
This patch allows new-style i2c chip drivers to have alias names using
the official kernel aliasing system and MODULE_DEVICE_TABLE(). At this
point, the old i2c driver binding scheme (driver_name/type) is still
supported.Signed-off-by: Jean Delvare
Cc: Jochen Friedrich
Cc: Jon Smirl
Cc: Kay Sievers
23 Apr, 2008
1 commit
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__FUNCTION__ is gcc-specific, use __func__.
Signed-off-by: Harvey Harrison
Signed-off-by: Jean Delvare
19 Apr, 2008
1 commit
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Signed-off-by: Matthew Wilcox
24 Mar, 2008
1 commit
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Sometimes kernel-doc and xmlto conspire to create output that is invalid
and causes problems. Until I know a real/better solution, change the
source code that causes this.If anyone has better fixes or can just explain what is happening here,
that would be great.xmlto: input does not validate (status 1)
mmotm-2008-0314-1449/Documentation/DocBook/kernel-api.xml:71468: parser error : Opening and ending tag mismatch: programlisting line 71464 and para
^
mmotm-2008-0314-1449/Documentation/DocBook/kernel-api.xml:71480: parser error : Opening and ending tag mismatch: para line 71473 and programlisting^
make[1]: *** [Documentation/DocBook/kernel-api.html] Error 1Signed-off-by: Randy Dunlap
Signed-off-by: Jean Delvare
12 Mar, 2008
1 commit
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Ensure that client->driver is set to NULL if the probe() returns an
error (this keeps client->driver and client->dev.driver in sync).Signed-off-by: Hans Verkuil
Acked-by: David Brownell
Signed-off-by: Jean Delvare
28 Jan, 2008
3 commits
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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
Signed-off-by: Jean Delvare -
It is no longer required to hold adapter->clist_lock to call
i2c_check_addr.Signed-off-by: Jean Delvare
Cc: David Brownell -
We only need to hold adapter->clist_lock when we touch the client list.
Signed-off-by: Jean Delvare