summaryrefslogtreecommitdiffstats
path: root/drivers/i2c
AgeCommit message (Collapse)AuthorFilesLines
2011-02-23i2c-omap: fixup commit cb527ede1bf6ff2008a025606f25344b8ed7b4ac whitespaceBen Dooks1-2/+2
Fixup the whitespace error noticed in cb527ede1bf6ff2008a025606f25344b8ed7b4ac Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23i2c-omap: Double clear of ARDY status in IRQ handlerRichard woodruff1-1/+5
This errata occurs when the ARDY interrupt generation is enabled. At the begining of every new transaction the ARDY interrupt is cleared. On continuous i2c transactions where after clearing the ARDY bit from I2C_STAT register (clearing the interrupt), the IRQ line is reasserted and the I2C_STAT[ARDY] bit set again on 1. In fact, the ARDY status bit is not cleared at the write access to I2C_STAT[ARDY] and only the IRQ line is deasserted and then reasserted. This is not captured in the usual errata documents. The workaround is to have a double clear of ARDY status in irq handler. Signed-off-by: Richard woodruff <r-woodruff2@ti.com> Signed-off-by: Keerthy <j-keerthy@ti.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-23i2c-omap: fix build for !CONFIG_SUSPENDBalaji T K1-2/+3
fix the build break when !CONFIG_SUSPEND drivers/i2c/busses/i2c-omap.c:1173: error: lvalue required as unary '&' operand make[3]: *** [drivers/i2c/busses/i2c-omap.o] Error 1 make[2]: *** [drivers/i2c/busses] Error 2 make[1]: *** [drivers/i2c] Error 2 make: *** [drivers] Error 2 Signed-off-by: Balaji T K <balajitk@ti.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-22i2c-omap: fix static suspend vs. runtime suspendKevin Hilman1-0/+28
When runtime PM is enabled, each OMAP i2c device is suspended after each i2c xfer. However, there are two cases when the static suspend methods must be used to ensure the devices are suspended: 1) runtime PM is disabled, either at compile time or dynamically via /sys/devices/.../power/control. 2) an i2c client driver uses i2c during it's suspend callback, thus leaving the i2c driver active (NOTE: runtime suspend transitions are disabled during system suspend, so i2c activity during system suspend will runtime resume the device, but not runtime (re)suspend it.) Since the actual work to suspend the device is handled by the subsytem, call the bus methods to take care of it. NOTE: This takes care of a known suspend problem on OMAP3 where the TWL RTC driver does i2c xfers during its suspend path leaving the i2c driver in an active state (since runtime suspend transistions are disabled.) Signed-off-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-02-22i2c-stu300: make sure adapter-name is terminatedWolfram Sang1-1/+1
Use strlcpy instead of strncpy. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Linus Walleij <linus.walleij@stericsson.com> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-14i2c: Encourage move to dev_pm_ops by warning on use of legacy methodsMark Brown1-0/+8
Since the PM core wishes to transition away from the legacy suspend and resume methods and since removing them makes using PM core features like runtime PM much easier start warning when a driver is registered using the legacy methods. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-14i2c: Factor out runtime suspend checks from PM operationsMark Brown1-48/+20
When devices use dev_pm_ops the I2C API is implementing standard functionality for integration with runtime PM and for checking for the presence of a per device op. The PM core provides pm_generic_ functions implementing this behaviour - use them to reduce coupling with future PM updates. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-14i2c: Unregister dummy devices last on adapter removalJean Delvare1-1/+13
Remove real devices first and dummy devices last. This gives device driver which instantiated dummy devices themselves a chance to clean them up before we do. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Hans Verkuil <hverkuil@xs4all.nl> Cc: stable@kernel.org
2011-01-14i2c: Convert SCx200 driver from using raw PCI to platform deviceAndres Salomon1-120/+80
The SCx200 ACB driver supports ISA hardware as well as PCI. The PCI hardware is CS5535/CS5536 based, and the device that it grabs is handled by the cs5535-mfd driver. This converts the SCx200 driver to use a platform_driver rather than the previous PCI hackery. The driver used to manually track the iface list (via linked list); now it only does this for ISA devices. PCI ifaces are handled through standard driver model lists. It's unclear what happens in case of errors in the old ISA code; rather than pretending the code actually cares, I've dropped the (implicit) ignorance of return values and marked it with a comment. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-01-13Merge branch 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linuxLinus Torvalds10-61/+1086
* 'for-linus/i2c-2638' of git://git.fluff.org/bjdooks/linux: i2c-bfin-twi: move setup to the earlier subsys initcall i2c-bfin-twi: handle faulty slave devices better i2c-mv64xxx: send repeated START between messages in xfer i2c-nomadik: fix regression on adapter name i2c-omap: Set latency requirements only once for several messages i2c-eg20t: add driver for Intel EG20T i2c-ocores: add some device tree documentation i2c-ocores: Use devres for resource allocation i2c-ocores: Adapt for device tree i2c-iop3xx: add iomem annotation
2011-01-13Merge branch 'for-next' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits) Documentation/trace/events.txt: Remove obsolete sched_signal_send. writeback: fix global_dirty_limits comment runtime -> real-time ppc: fix comment typo singal -> signal drivers: fix comment typo diable -> disable. m68k: fix comment typo diable -> disable. wireless: comment typo fix diable -> disable. media: comment typo fix diable -> disable. remove doc for obsolete dynamic-printk kernel-parameter remove extraneous 'is' from Documentation/iostats.txt Fix spelling milisec -> ms in snd_ps3 module parameter description Fix spelling mistakes in comments Revert conflicting V4L changes i7core_edac: fix typos in comments mm/rmap.c: fix comment sound, ca0106: Fix assignment to 'channel'. hrtimer: fix a typo in comment init/Kconfig: fix typo anon_inodes: fix wrong function name in comment fix comment typos concerning "consistent" poll: fix a typo in comment ... Fix up trivial conflicts in: - drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c) - fs/ext4/ext4.h Also fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.
2011-01-12Merge branch 'for-2638/i2c/bfin2' into for-linus/i2c-2638Ben Dooks1-1/+23
2011-01-12Merge branch 'for-2638/i2c/nomadik' into for-linus/i2c-2638Ben Dooks1-2/+4
2011-01-12Merge branch 'for-2638/i2c/intel' into for-linus/i2c-2638Ben Dooks3-0/+909
2011-01-12Merge branch 'for-2638/i2c/ocores' into for-linus/i2c-2638Ben Dooks1-43/+102
2011-01-12Merge branch 'for-2638/i2c/iop' into for-linus/i2c-2638Ben Dooks2-4/+4
2011-01-12Merge branch 'for-2638/i2c/omap' into for-linus/i2c-2638Ben Dooks1-4/+6
2011-01-12Merge branch 'for-2638/i2c/mv64xx' into for-linus/i2c-2638Ben Dooks1-7/+38
2011-01-12i2c-bfin-twi: move setup to the earlier subsys initcallMichael Hennerich1-1/+1
Some systems using this bus sometimes have very basic devices such as regulators on the bus, so the I2C bus master needs to be loaded early. This also matches the behavior of many other I2C bus master drivers. Therefore initialize via subsys_initcall(). Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-12i2c-bfin-twi: handle faulty slave devices betterMichael Hennerich1-0/+22
Faulty slave devices might drive SDA low after a transfer finishes. So, when this scenario is detected, have the master generate up to 9 extra clocks until the SDA is properly released. Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-10i2c: Constify i2c_client where possibleJean Delvare1-13/+16
Helper functions for I2C and SMBus transactions don't modify the i2c_client that is passed to them, so it can be marked const. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10i2c-algo-bit: Complain about masters which can't read SCLJean Delvare1-2/+12
The I2C specification explicitly describes both SDA and SCL as bidirectional lines. An I2C master with a read-only SCL is thus not compliant. If a slow slave stretches the clock, errors will happen, so the bus can't be considered as reliable. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10i2c-algo-bit: Refactor adapter registrationJean Delvare1-16/+5
Use a function pointer to decide whether to call i2c_add_adapter or i2c_add_numbered_adapter. This makes the code more compact than the current strategy of having the common code in a separate function. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10i2c: Add generic I2C multiplexer using GPIO APIPeter Korsgaard3-0/+197
Add an i2c mux driver providing access to i2c bus segments using a hardware MUX sitting on a master bus and controlled through gpio pins. E.G. something like: ---------- ---------- Bus segment 1 - - - - - | | SCL/SDA | |-------------- | | | |------------| | | | | | Bus segment 2 | | | Linux | GPIO 1..N | MUX |--------------- Devices | |------------| | | | | | | | Bus segment M | | | |---------------| | ---------- ---------- - - - - - SCL/SDA of the master I2C bus is multiplexed to bus segment 1..M according to the settings of the GPIO pins 1..N. Signed-off-by: Peter Korsgaard <peter.korsgaard@barco.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10i2c-nforce2: Remove unnecessary cast of pci_get_drvdataJoe Perches1-1/+1
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-10i2c-i801: Include <linux/slab.h>Ben Hutchings1-0/+1
Commit 5a0e3ad6af8660be21ca98a971cd00f331318c05 added direct inclusion of <linux/slab.h> to those source files that appeared to need it, but somehow missed this. On most architectures <linux/slab.h> is still indirectly included, but there are exceptions such as alpha. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2011-01-04i2c-mv64xxx: send repeated START between messages in xferRodolfo Giometti1-7/+38
As stated into file include/linux/i2c.h we must send a repeated START between messages in the same xfer groupset: * Except when I2C "protocol mangling" is used, all I2C adapters implement * the standard rules for I2C transactions. Each transaction begins with a * START. That is followed by the slave address, and a bit encoding read * versus write. Then follow all the data bytes, possibly including a byte * with SMBus PEC. The transfer terminates with a NAK, or when all those * bytes have been transferred and ACKed. If this is the last message in a * group, it is followed by a STOP. Otherwise it is followed by the next * @i2c_msg transaction segment, beginning with a (repeated) START. Signed-off-by: Rodolfo Giometti <giometti@linux.it> Signed-off-by: Mauro Barella <mbarella@vds-it.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-nomadik: fix regression on adapter nameLinus Walleij1-2/+4
The Nomadik I2C adapter does not provide a name for the struct passed into i2c_add_numbered_adapter() causing a regression on 2.6.37-rc3 due to commit 2236baa75f704851d3cd3310569058151acb1f06 adding sanity checks for adapters. Fix this by providing a name proper. Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-omap: Set latency requirements only once for several messagesSamu Onkalo1-4/+6
Ordinary I2C read consist of two messages. First a write operation to tell register address and then read operation to get data. CPU wake up latency is set and removed twice in read case. Set latency requirement before the message processing loop and remove the requirement after the loop to remove latency adjustment operations between the messages. Signed-off-by: Samu Onkalo <samu.p.onkalo@nokia.com> Acked-by: Kevin Hilman <khilman@deeprootsystems.com> Acked-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-eg20t: add driver for Intel EG20TTomoya MORINAGA3-0/+909
I2C driver for Intel EG20T PCH Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Reviewed-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Qi Wang <qi.wang@intel.com> [ben-linux@fluff.org: reworded commit message] Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-ocores: add some device tree documentationJonas Bonn1-0/+35
This puts some documentation for the device tree configuration at the head of the driver file. Hopefully this can get moved to a common area for this type of documentation at a later date; unfortunately, there isn't really such a place in the kernel tree at this time. Furthermore, the regstep and clock-frequency parameters are really bus parameters and should probably be passed to the driver in a better way. Consider that a TODO. Signed-off-by: Jonas Bonn <jonas@southpole.se> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-ocores: Use devres for resource allocationJonas Bonn1-35/+11
This patch converts the i2c-cores driver to use devres routines for resource allocation. Signed-off-by: Jonas Bonn <jonas@southpole.se> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-ocores: Adapt for device treeJonas Bonn1-8/+56
This patch adapts the i2c-ocores driver for being defined and configured via a device tree description. The device tree bits need to be protected by CONFIG_OF guards as this is still an optional feature. Signed-off-by: Jonas Bonn <jonas@southpole.se> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2011-01-04i2c-iop3xx: add iomem annotationAaro Koskinen2-4/+4
Eliminate unnecessary casts and the following sparse warnings: drivers/i2c/busses/i2c-iop3xx.c:65:9: warning: incorrect type in argument 1 (different base types) drivers/i2c/busses/i2c-iop3xx.c:65:9: expected void const volatile [noderef] <asn:2>*<noident> drivers/i2c/busses/i2c-iop3xx.c:65:9: got unsigned int [ the previous warning is repeated 18 times ] drivers/i2c/busses/i2c-iop3xx.c:456:33: warning: cast removes address space of expression Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
2010-12-22Merge branch 'master' into for-nextJiri Kosina7-161/+205
Conflicts: MAINTAINERS arch/arm/mach-omap2/pm24xx.c drivers/scsi/bfa/bfa_fcpim.c Needed to update to apply fixes for which the old branch was too outdated.
2010-12-20I2C: i2c-omap: Change device name: i2c_omap -> omap_i2cBenoit Cousson1-2/+2
The convention for omap device naming is omap_XXX. Rename the device and driver name in order to stick to this naming convention. Change device name in clock nodes as well. Signed-off-by: Benoit Cousson <b-cousson@ti.com> Cc: Kevin Hilman <khilman@deeprootsystems.com> Cc: Rajendra Nayak <rnayak@ti.com> Cc: Ben Dooks <ben-i2c@fluff.org> Acked-by: Paul Walmsley <paul@pwsan.com> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2010-12-17Merge branch 'devel-board' into omap-for-linusTony Lindgren1-1/+1
2010-12-14i2c_intel_mid: Fix slash in sysfs nameAlan Cox1-1/+1
This gets caught by the new sanity check code. Instead of the slash use a different symbol. This was originally found by Major Lee who proposed a rather more complex patch which changed the name according to the chip type. On the basis that we are in a late -rc and making Linus grumpy isn't always a good idea (however fun) this is a simple alternative. Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-10Merge branch 'devel-omap-irq' into omap-for-linusTony Lindgren2-15/+2
2010-11-30Merge branch 'pm-hwmod-i2c' of ↵Tony Lindgren1-46/+23
ssh://master.kernel.org/pub/scm/linux/kernel/git/khilman/linux-omap-pm into omap-for-linus
2010-11-22i2c/algos: convert Kconfig to use the menu's `visible' keywordArnaud Lacombe1-1/+1
Signed-off-by: Arnaud Lacombe <lacombar@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-11-22Revert "i2c: Fix Kconfig dependencies"Arnaud Lacombe2-14/+1
This reverts commit 0a57274ea026c2b7670683947b6cc08b195148cf. Signed-off-by: Arnaud Lacombe <lacombar@gmail.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-11-15i2c: Sanity checks on adapter registrationJean Delvare1-0/+12
Make sure I2C adapters being registered have the required struct fields set. If they don't, problems will happen later. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-11-15i2c: Mark i2c_adapter.id as deprecatedJean Delvare1-1/+0
It's about time to make it clear that i2c_adapter.id is deprecated. Hopefully this will remind the last user to move over to a different strategy. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jarod Wilson <jarod@redhat.com> Acked-by: Mauro Carvalho Chehab <mchehab@redhat.com> Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
2010-11-09OMAP: I2C: Convert i2c driver to use PM runtime api'sRajendra Nayak1-46/+23
This patch converts the i2c driver to use PM runtime apis Signed-off-by: Rajendra Nayak <rnayak@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Jean Delvare <khali@linux-fr.org> Acked-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
2010-11-01tree-wide: fix comment/printk typosUwe Kleine-König1-2/+2
"gadget", "through", "command", "maintain", "maintain", "controller", "address", "between", "initiali[zs]e", "instead", "function", "select", "already", "equal", "access", "management", "hierarchy", "registration", "interest", "relative", "memory", "offset", "already", Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2010-10-31i2c-i801: Add PCI idents for Patsburg 'IDF' SMBus controllersDavid Woodhouse1-0/+12
These are the extra 'Integrated Device Function' SMBus controllers found on the Patsburg chipset. Mention the absence of slave mode support. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31i2c-i801: Handle multiple instances instead of keeping global stateDavid Woodhouse1-144/+175
It's poor form to keep driver state in global variables rather than per-instance. It never really mattered in practice when there was only one controller on the chipset, but the latest chipsets do have more than one controller, so now we care. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-31i2c-i801: Add Intel Patsburg device IDSeth Heasley2-0/+3
Add support for the Intel Patsburg PCH SMBus Controller. Signed-off-by: Seth Heasley <seth.heasley@intel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2010-10-29Merge branch 'for-2637/i2c-all' of git://git.fluff.org/bjdooks/linuxLinus Torvalds5-16/+1176
* 'for-2637/i2c-all' of git://git.fluff.org/bjdooks/linux: i2c-intel-mid: Driver depends on PCI i2c-intel-mid: support for Moorestown and Medfield platform i2c-nomadik: fixup bus delays i2c-nomadik: support smbus emulation i2c-nomadik: dynamic clocking i2c-nomadik: documentation fixes i2c-s3c2410: Enable i2c clock only when doing some transfert
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-07 15:42:27 +0000