- 14 9月, 2012 1 次提交
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由 Joakim Tjernlund 提交于
mpc_i2c_stop() only initiates STOP but does not wait for it to hit the I2C bus. This is a problem when using I2C devices which uses fairly long clock stretching just before STOP if you also have an i2c-mux which may switch to another bus before STOP has been processed. Signed-off-by: NJoakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
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- 11 9月, 2012 2 次提交
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由 Arnd Bergmann 提交于
Since of_device_id.data is declared as a pointer to const data a few more consts can be added in this driver. [ukl: split Arnd's patch by driver] Signed-off-by: NArnd Bergmann <arnd@arndb.de> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
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由 Uwe Kleine-König 提交于
This prepares *of_device_id.data becoming const. Without this change the following warning would occur: drivers/i2c/busses/i2c-mpc.c: In function 'fsl_i2c_probe': drivers/i2c/busses/i2c-mpc.c:650:31: warning: initialization discards 'const' qualifier from pointer target type [enabled by default] Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
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- 12 5月, 2012 1 次提交
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由 Zhao Chenhui 提交于
When entering deep sleep, the value in the registers I2CFDR and I2CDFSRR are lost. This causes I2C access to fail after resuming. Add suspend/resume routines to save/restore the registers I2CFDR and I2CDFSRR. Signed-off-by: NZhao Chenhui <chenhui.zhao@freescale.com> Signed-off-by: NLi Yang <leoli@freescale.com> Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
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- 25 2月, 2012 1 次提交
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由 Tang Yuantian 提交于
Add support for SMBUS_READ_BLOCK_DATA to the i2c-mpc bus driver. Signed-off-by: NTang Yuantian <Yuantian.Tang@freescale.com> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: NWolfram Sang <w.sang@pengutronix.de>
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- 13 1月, 2012 1 次提交
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由 Axel Lin 提交于
Convert the drivers in drivers/i2c/busses/* to use the module_platform_driver() macro which makes the code smaller and a bit simpler. Cc: Ben Dooks <ben-linux@fluff.org> Acked-by: NJochen Friedrich <jochen@scram.de> Acked-by: NPeter Korsgaard <jacmet@sunsite.dk> Acked-by: NWolfram Sang <w.sang@pengutronix.de> Cc: Manuel Lauss <manuel.lauss@googlemail.com> Cc: Barry Song <21cnbao@gmail.com> Cc: Linus Walleij <linus.walleij@linaro.org> Cc: Yong Zhang <yong.zhang0@gmail.com> Cc: Lucas De Marchi <lucas.demarchi@profusion.mobi> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: NAxel Lin <axel.lin@gmail.com> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 19 5月, 2011 1 次提交
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由 Grant Likely 提交于
Commit b826291c, "drivercore/dt: add a match table pointer to struct device" added an of_match pointer to struct device to cache the of_match_table entry discovered at driver match time. This was unsafe because matching is not an atomic operation with probing a driver. If two or more drivers are attempted to be matched to a driver at the same time, then the cached matching entry pointer could get overwritten. This patch reverts the of_match cache pointer and reworks all users to call of_match_device() directly instead. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 01 3月, 2011 1 次提交
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由 Grant Likely 提交于
Final step to eliminate of_platform_bus_type. They're all just platform drivers now. v2: fix type in pasemi_nand.c (thanks to Stephen Rothwell) Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 30 9月, 2010 1 次提交
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由 Grant Likely 提交于
Commit 959e85f7, "i2c: add OF-style registration and binding" caused a module dependency loop where of_i2c.c calls functions in i2c-core, and i2c-core calls of_i2c_register_devices() in of_i2c. This means that when i2c support is built as a module when CONFIG_OF is set, then neither i2c_core nor of_i2c are able to be loaded. This patch fixes the problem by moving the of_i2c_register_devices() calls back into the device drivers. Device drivers already specifically request the core code to parse the device tree for devices anyway by setting the of_node pointer, so it isn't a big deal to also call the registration function. The drivers just become slightly more verbose. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 06 8月, 2010 1 次提交
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由 Grant Likely 提交于
of_device is just an alias for platform_device, so remove it entirely. Also replace to_of_device() with to_platform_device() and update comment blocks. This patch was initially generated from the following semantic patch, and then edited by hand to pick up the bits that coccinelle didn't catch. @@ @@ -struct of_device +struct platform_device Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Reviewed-by: NDavid S. Miller <davem@davemloft.net>
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- 02 8月, 2010 1 次提交
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由 Albrecht Dreß 提交于
This patch improves the recovery of the MPC's I2C bus from errors like bus hangs resulting in timeouts: 1. make the bus timeout configurable, as it depends on the bus clock and the attached slave chip(s); default is still 1 second; 2. detect any of the cases indicated by the CF, BB and RXAK MSR flags if a timeout occurs, and add a missing (required) MAL reset; 3. use a more reliable method to fixup the bus if a hang has been detected. The sequence is sent 9 times which seems to be necessary if a slave "misses" more than one clock cycle. For 400 kHz bus speed, the fixup is also ~70us (81us vs. 150us) faster. Tested on a custom Lite5200b derived board, with a Dallas RTC, AD sensors and NXP IO expander chips attached to the i2c. Changes vs. v1: - use improved bus fixup sequence for all chips (not only the 5200) - calculate real clock from defaults if no clock is given in the device tree - better description (I hope) of the changes. I didn't split the changes in this file into three parts as recommended by Grant, as they actually belong together (i.e. they address one single problem, just in three places of one single source file). Signed-off-by: NAlbrecht Dreß <albrecht.dress@arcor.de> [grant.likely@secretlab.ca: fixup for ->node to ->dev.of_node transition] Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 06 7月, 2010 2 次提交
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由 Grant Likely 提交于
This patch adds OF hooks to the i2c core so that devices can automatically be registered based on device tree data. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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由 Grant Likely 提交于
This patch cleans up the i2c OF support code to make it selectable by all architectures and allow for automatic registration of i2c devices. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 22 5月, 2010 1 次提交
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由 Grant Likely 提交于
.name, .match_table and .owner are duplicated in both of_platform_driver and device_driver. This patch is a removes the extra copies from struct of_platform_driver and converts all users to the device_driver members. This patch is a pretty mechanical change. The usage model doesn't change and if any drivers have been missed, or if anything has been fixed up incorrectly, then it will fail with a compile time error, and the fixup will be trivial. This patch looks big and scary because it touches so many files, but it should be pretty safe. Signed-off-by: NGrant Likely <grant.likely@secretlab.ca> Acked-by: NSean MacLennan <smaclennan@pikatech.com>
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- 20 5月, 2010 1 次提交
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由 Wolfram Sang 提交于
Drop NO_IRQ as 0 is the preferred way to describe 'no irq' (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is only used on powerpc, where NO_IRQ is 0 anyhow. Signed-off-by: NWolfram Sang <w.sang@pengutronix.de> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Cc: Ben Dooks <ben-linux@fluff.org>
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- 19 5月, 2010 1 次提交
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由 Grant Likely 提交于
The following structure elements duplicate the information in 'struct device.of_node' and so are being eliminated. This patch makes all readers of these elements use device.of_node instead. (struct of_device *)->node (struct dev_archdata *)->prom_node (sparc) (struct dev_archdata *)->of_node (powerpc & microblaze) Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 06 5月, 2010 1 次提交
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由 Wolfram Sang 提交于
Drop NO_IRQ as 0 is the preferred way to describe 'no irq' (http://lkml.org/lkml/2005/11/21/221). This change is safe, as the driver is only used on powerpc, where NO_IRQ is 0 anyhow. Signed-off-by: NWolfram Sang <w.sang@pengutronix.de> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Cc: Ben Dooks <ben-linux@fluff.org> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 30 3月, 2010 1 次提交
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由 Tejun Heo 提交于
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: NTejun Heo <tj@kernel.org> Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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- 08 3月, 2010 3 次提交
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由 Wolfgang Grandegger 提交于
As I2C interrupts must be enabled for the MPC512x by the setup function as well, "fsl,preserve-clocking" is handled in a slighly different way. Also, the old settings are now reported calling dev_dbg(). For the MPC512x the clock setup function of the MPC52xx can be re-used. Furthermore, the Kconfig help has been updated and corrected. Signed-off-by: NWolfgang Grandegger <wg@denx.de> Reviewed-by: NWolfram Sang <w.sang@pengutronix.de> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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由 Wolfgang Grandegger 提交于
To prepare support for the MPC512x processors from Freescale the "setclock" initialization functions have been renamed to "setup" because I2C interrupts must be enabled for the MPC512x by this function as well. Signed-off-by: NWolfgang Grandegger <wg@denx.de> Acked-by: NWolfram Sang <w.sang@pengutronix.de> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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由 Wolfgang Grandegger 提交于
"__devinit[data]" has not yet been used for all initialization functions and data. To avoid truncating lines, the struct "mpc_i2c_match_data" has been renamed to "mpc_i2c_data", which is even the better name. Signed-off-by: NWolfgang Grandegger <wg@denx.de> Tested-by: NWolfram Sang <w.sang@pengutronix.de> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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- 03 11月, 2009 1 次提交
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由 Joakim Tjernlund 提交于
The driver always ends a read with a STOP condition which breaks subsequent I2C reads/writes in the same transaction as these expect to do a repeated START(ReSTART). This will also help I2C multimaster as the bus will not be released after the first read, but when the whole transaction ends. Signed-off-by: NJoakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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- 17 6月, 2009 1 次提交
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由 Wolfgang Denk 提交于
So far, MPC512x used mpc512x_find_ips_freq() to get the bus frequency, while MPC52xx used mpc52xx_find_ipb_freq(). Despite the different clock names (IPS vs. IPB) the code was identical. Use common code for both processor families. Signed-off-by: NWolfgang Denk <wd@denx.de> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 12 5月, 2009 1 次提交
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由 Wolfgang Grandegger 提交于
The clock setting did not work for the MPC52xx due to a stupid bug. Furthermore, the dev info output "clock=0" for old device trees was misleading. This patch fixes both issues. Signed-off-by: NWolfgang Grandegger <wg@grandegger.com> Acked-by: NGrant Likely <grant.likely@secretlab.ca> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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- 07 4月, 2009 3 次提交
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由 Wolfgang Grandegger 提交于
This patch makes the I2C bus speed configurable by using the I2C node property "clock-frequency". If the property is not defined, the old fixed clock settings will be used for backward comptibility. The generic I2C clock properties, especially the CPU-specific source clock pre-scaler are defined via the OF match table: static const struct of_device_id mpc_i2c_of_match[] = { ... {.compatible = "fsl,mpc8543-i2c", .data = &(struct fsl_i2c_match_data) { .setclock = mpc_i2c_setclock_8xxx, .prescaler = 2, }, }, The "data" field defines the relevant I2C setclock function and the relevant pre-scaler for the I2C source clock frequency. It uses arch-specific tables and functions to determine resonable Freqency Divider Register (fdr) values for MPC83xx, MPC85xx, MPC86xx, MPC5200 and MPC5200B. The i2c->flags field and the corresponding FSL_I2C_DEV_* definitions have been removed as they are obsolete. Signed-off-by: NWolfgang Grandegger <wg@grandegger.com> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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由 Wolfgang Grandegger 提交于
This patch used the dev_dbg, dev_err, etc. functions for debug and error output instead of printk and pr_debug. Signed-off-by: NWolfgang Grandegger <wg@grandegger.com> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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由 Wolfgang Grandegger 提交于
Fix errors reported by checkpatch (indention, long lines, trailing white space, etc.). Signed-off-by: NWolfgang Grandegger <wg@grandegger.com> Signed-off-by: NBen Dooks <ben-linux@fluff.org>
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- 29 3月, 2009 1 次提交
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由 Jean Delvare 提交于
i2c_adapter.timeout is in jiffies. Fix all drivers which thought otherwise. It didn't really matter as long as the value was only used inside the driver, but soon i2c-core will use it too so it must have the proper unit. Note: for the i2c-mpc driver, this fixes a bug in polling mode. Timeout would trigger after 1 jiffy, which is most probably not what the author wanted. Signed-off-by: NJean Delvare <khali@linux-fr.org> Cc: Clifford Wolf <clifford@clifford.at> Acked-by: NSean MacLennan <smaclennan@pikatech.com> Cc: Stefan Roese <sr@denx.de> Acked-by: NLennert Buytenhek <kernel@wantstofly.org> Cc: Dan Williams <dan.j.williams@intel.com> Cc: Grant Likely <grant.likely@secretlab.ca> Acked-by: NMark A. Greer <mgreer@mvista.com>
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- 09 3月, 2009 1 次提交
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由 Timur Tabi 提交于
The i2c_wait() function is using wait_event_interruptible_timeout() to wait for the I2C controller to signal that it has completed an I2C bus operation. If the process that causes the I2C operation terminated abruptly, the wait will be interrupted, returning an error. It is better to let the I2C operation finished before the process exits. It is safe to use wait_event_timeout() instead, because the timeout will allow the process to exit if the I2C bus hangs. It's also better to allow the I2C operation to finish, because unacknowledged I2C operations can cause the I2C bus to hang. Signed-off-by: NTimur Tabi <timur@freescale.com> Acked-by: NBen Dooks <ben-linux@fluff.org> Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
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- 27 1月, 2009 1 次提交
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由 Jean Delvare 提交于
Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 09 10月, 2008 1 次提交
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由 Wolfgang Grandegger 提交于
This patch suppresses I2C device probing by clearing the class field of the "struct i2c_adapter" for the MPC I2C bus adapters. Some board configurations which rely on probing must be fixed up by adding a proper I2C device node to the DTS file, like the TQM85xx modules. Signed-off-by: NWolfgang Grandegger <wg@grandegger.com> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 15 7月, 2008 1 次提交
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由 Jean Delvare 提交于
Let general purpose I2C/SMBus bus drivers add SPD to their class. Once this is done, we will be able to tell the eeprom driver to only probe for SPD EEPROMs and similar on these buses. Note that I took a conservative approach here, adding I2C_CLASS_SPD to many drivers that have no idea whether they can host SPD EEPROMs or not. This is to make sure that the eeprom driver doesn't stop probing buses where SPD EEPROMs or equivalent live. So, bus driver maintainers and users should feel free to remove the SPD class from drivers those buses never have SPD EEPROMs or they don't want the eeprom driver to bind to them. Likewise, feel free to add the SPD class to any bus driver I might have missed. Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 13 7月, 2008 1 次提交
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由 Jon Smirl 提交于
Convert i2c-mpc to an of_platform driver. Utilize the code in drivers/of-i2c.c to make i2c modules dynamically loadable by the device tree. Signed-off-by: NJon Smirl <jonsmirl@gmail.com> Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
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- 12 5月, 2008 1 次提交
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由 Jon Smirl 提交于
Alter the mpc i2c driver to use the NO_IRQ symbol instead of the constant zero when checking for valid interrupts. NO_IRQ=-1 on ppc and NO_IRQ=0 on powerpc so the checks against zero are not correct. Signed-off-by: NJon Smirl <jonsmirl@gmail.com> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 23 4月, 2008 1 次提交
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由 Kay Sievers 提交于
Since 43cc71ee, the platform modalias is prefixed with "platform:". Add MODULE_ALIAS() to the hotpluggable I2C platform drivers, to allow module auto loading. [ db: add some more drivers ] Signed-off-by: NKay Sievers <kay.sievers@vrfy.org> Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 28 1月, 2008 2 次提交
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由 Jon Smirl 提交于
Propagate the error values returned by i2c_wait() instead of overriding them with a meaningless -1. Signed-off-by: NJon Smirl <jonsmirl@gmail.com> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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由 Jean Delvare 提交于
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: NJean Delvare <khali@linux-fr.org>
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- 15 8月, 2007 2 次提交
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由 Domen Puncer 提交于
Disabling module on stop doesn't work on some CPUs (ie. mpc8241, as reported by Guennadi Liakhovetski), so remove that. Disable I2C module on errors/interrupts to prevent it from locking up on mpc5200b. Signed-off-by: NDomen Puncer <domen.puncer@telargo.com> Acked-by: NGuennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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由 Scott Wood 提交于
Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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- 12 7月, 2007 1 次提交
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由 Domen Puncer 提交于
Work around a problem reported on: http://ozlabs.org/pipermail/linuxppc-embedded/2005-July/019038.html Without this patch I2C on mpc5200 becomes unusable after a while. Tested on mpc5200 boards by Matthias Fechner and me. Signed-off-by: NDomen Puncer <domen.puncer@telargo.com> Signed-off-by: NJean Delvare <khali@linux-fr.org>
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