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* i2c: imx: disable clock when it's possible to save power.Richard Zhao2009-11-031-6/+6
| | | | | | | Enable clock before START, disable it after STOP. Signed-off-by: Richard Zhao <linuxzsc@gmail.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c: imx: only imx1 needs disable delayRichard Zhao2009-11-031-5/+7
| | | | | | | check cpu_is_mx1() when disable delay. Signed-off-by: Richard Zhao <linuxzsc@gmail.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c: imx: check busy bit when START/STOPRichard Zhao2009-11-031-18/+44
| | | | | | | | | | The controller can't do anything else before it actually generates START/STOP. So we check busy bit to make sure START/STOP is successfully finished. If we don't check busy bit, START/STOP may fail on some fast CPUs. Signed-off-by: Richard Zhao <linuxzsc@gmail.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c: Hide probe errors caused by ACPI resource conflictsJean Delvare2009-10-047-8/+12
| | | | | | | | | | | | When an ACPI resource conflict is detected, error messages are already printed by ACPI. There's no point in causing the driver core to print more error messages, so return one of the error codes for which no message is printed. This fixes bug #14293: http://bugzilla.kernel.org/show_bug.cgi?id=14293 Signed-off-by: Jean Delvare <khali@linux-fr.org>
* ACPI: i2c-scmi: don't use acpi_device_uid()Bjorn Helgaas2009-09-261-3/+2
| | | | | | | | We recently removed the acpi_device_uid() interface because nobody used it. I don't think it's essential here either. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Len Brown <len.brown@intel.com>
* Merge branch 'origin' into for-linusRussell King2009-09-2418-735/+661
|\ | | | | | | | | Conflicts: MAINTAINERS
| * Merge branch 'i2c-for-linus' of ↵Linus Torvalds2009-09-2315-729/+621
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: Clearly mark ACPI drivers as such i2c: Add driver for SMBus Control Method Interface i2c-pnx: Correct use of request_region/request_mem_region MAINTAINERS: Add maintainer for AT24 and PCA9564/PCA9665 i2c-piix4: Add AMD SB900 SMBus device ID i2c/chips: Remove deprecated pcf8574 driver i2c/chips: Remove deprecated pca9539 driver i2c/chips: Remove deprecated pcf8575 driver gpio/pcf857x: Copy i2c_device_id from old pcf8574 driver i2c/scx200_acb: Provide more information on bus errors i2c: Provide compatibility links for i2c adapters i2c: Convert i2c adapters to bus devices i2c: Convert i2c clients to a device type i2c/tsl2550: Use combined SMBus transactions i2c-taos-evm: Switch echo off to improve performance i2c: Drop unused i2c_driver.id field
| | * i2c: Clearly mark ACPI drivers as suchJean Delvare2009-09-182-12/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have ACPI-based SMBus controller drivers, and we will start telling users to use them instead of native drivers when I/O resources conflict, I think it would be good to clearly mark ACPI drivers as such in Kconfig. This is exactly the same as we just did for hwmon drivers. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Crane Cai <crane.cai@amd.com>
| | * i2c: Add driver for SMBus Control Method InterfaceCrane Cai2009-09-183-0/+444
| | | | | | | | | | | | | | | | | | | | | | | | | | | This driver supports the SMBus Control Method Interface. It needs BIOS declare ACPI control methods which described in SMBus Control Method Interface Spec. http://smbus.org/specs/smbus_cmi10.pdf Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c-pnx: Correct use of request_region/request_mem_regionJulia Lawall2009-09-181-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | request_mem_region should be used when ioremap is used subsequently. release_region is then correspondingly replaced by release_mem_region. The semantic patch that fixes this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ expression start,E; @@ - request_region + request_mem_region (start,...) ... when != request_mem_region(start,...) when != start = E ioremap(start,...) @@ expression r.start; @@ - release_region + release_mem_region (start,...) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c-piix4: Add AMD SB900 SMBus device IDCrane Cai2009-09-182-4/+8
| | | | | | | | | | | | | | | | | | | | | Add new SMBus device ID for AMD SB900. Signed-off-by: Crane Cai <crane.cai@amd.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c/chips: Remove deprecated pcf8574 driverWolfram Sang2009-09-183-233/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pcf8574 driver in drivers/i2c/chips which just exports its register to sysfs is superseded by drivers/gpio/pcf857x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Aurelien Jarno <aurelien@aurel32.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c/chips: Remove deprecated pca9539 driverWolfram Sang2009-09-183-166/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pca9539 driver in drivers/i2c/chips which just exports its registers to sysfs is superseded by drivers/gpio/pca953x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Ben Gardner <gardner.ben@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c/chips: Remove deprecated pcf8575 driverWolfram Sang2009-09-183-217/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The pcf8575 driver in drivers/i2c/chips which just exports its register to sysfs is superseded by drivers/gpio/pcf857x.c which properly uses the gpiolib. As this driver has been deprecated for more than a year, finally remove it. Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Cc: Bart Van Assche <bart.vanassche@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c/scx200_acb: Provide more information on bus errorsWilly Tarreau2009-09-181-2/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | Upon a bus error, it's rather hard to guess what happened. Dumping the address, length and status provides a lot of value for troubleshooting issues. Signed-off-by: Willy Tarreau <wtarreau@exceliance.fr> Signed-off-by: Jean Delvare <khali@linux-fr.org>
| | * i2c: Provide compatibility links for i2c adaptersJean Delvare2009-09-182-1/+40
| | | | | | | | | | | | | | | | | | | | | | | | | | | Some user-space applications may be relying on i2c adapters showing up as class devices in sysfs. Provide compatibility links for them for the time being. We will remove them after a long transition period. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org>
| | * i2c: Convert i2c adapters to bus devicesJean Delvare2009-09-181-35/+40
| | | | | | | | | | | | | | | | | | | | | | | | Kay says i2c adapters shouldn't be class devices but bus devices. Convert them that way, using a device type. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org>
| | * i2c: Convert i2c clients to a device typeJean Delvare2009-09-181-20/+47
| | | | | | | | | | | | | | | | | | | | | This is required for upcoming changes. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Kay Sievers <kay.sievers@vrfy.org>
| | * i2c/tsl2550: Use combined SMBus transactionsJean Delvare2009-09-181-32/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the I/O faster, mainly by using combined SMBus transactions when possible. While the TSL2550 datasheet doesn't say the device supports them, they seem to work just fine in practice, and a combined transaction is faster than two simple transactions in many cases and always more reliable. A side effect is to suppress the delays between SMBus writes and reads. The datasheet doesn't say they are needed and things work just fine for me without them. I also couldn't see any reason for the delay between reading the two channels. Nor for the loop to get a reading in the first place. The 400 ms delay between samples only matters at chip power-up, after that the chip always hold the previously sampled value so we never get to wait. All these changes make reading the lux value much faster and cheaper. Signed-off-by: Jean Delvare <khali@linux-fr.org> Tested-by: Michele De Candia <michele.decandia@valueteam.com> Cc: Rodolfo Giometti <giometti@linux.it>
| | * i2c-taos-evm: Switch echo off to improve performanceJean Delvare2009-09-181-21/+24
| | | | | | | | | | | | | | | | | | | | | | | | When echo is on, we waste time reading back our orders. Switching echo off makes performance much better: SMBus byte data transactions are 47% faster and byte transactions are 24% faster. Signed-off-by: Jean Delvare <khali@linux-fr.org>
| * | [PATCH] i2c-imx: make bus available earlyWolfram Sang2009-09-201-2/+1
| | | | | | | | | | | | | | | | | | | | | | | | As I2C is used by PMICs also, make the busses available early via subsys_initcall(). Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * | i2c-mv64xxx: correct mv64xxx_i2c_intr() return typeMikael Pettersson2009-09-201-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mv64xxx_i2c_intr() irq handler in drivers/i2c/busses/i2c-mv64xxx.c is declared as returning 'int', resulting in this compile-time warning: drivers/i2c/busses/i2c-mv64xxx.c: In function 'mv64xxx_i2c_probe': drivers/i2c/busses/i2c-mv64xxx.c:540: warning: passing argument 2 of 'request_irq' from incompatible pointer type Fix: correct the return type to 'irqreturn_t'. Signed-off-by: Mikael Pettersson <mikpe@it.uu.se> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * | i2c: Runtime PM for SuperH Mobile I2CMagnus Damm2009-08-231-2/+37
| |/ | | | | | | | | | | | | | | | | | | | | This patch modifies the SuperH Mobile I2C driver to support Runtime PM. These changes is all that is needed for proper Runtime PM support in this driver. Driver callbacks for Runtime PM are empty because the device registers are always re-initialized after pm_runtime_get_sync(). Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
* | Merge branch 'devel' of ↵Russell King2009-09-211-2/+2
|\ \ | |/ |/| | | git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel
| * [ARM] pxa: update dependancy of pxa i2c moduleHaojian Zhuang2009-09-101-2/+2
| | | | | | | | | | | | | | | | PXA I2C module is also used in Marvell PXA168 and PXA910 series. Update the module dependancy of PXA I2C. Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
* | Merge branch 'master' into for-linusRafael J. Wysocki2009-08-232-67/+104
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| * i2c-stu300: I2C STU300 stability updatesLinus Walleij2009-08-201-65/+92
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - blk clk is enabled when an irq arrives. The clk should be enabled, but just to make sure. - All error bits are handled no matter state machine state - All irq's will run complete() except for irq's that wasn't an event. - No more looking into status registers just in case an interrupt has happend and the irq handle wasn't executed. - irq_disable/enable are now separete functions. - clk settings calculation changed to round upwards instead of downwards. - Number of address send attempts before giving up is increased to 12 from 10 since it most times take 8 tries before getting through. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-omap: Enable workaround for Errata 1.153 based onMoiz Sonasath2009-08-201-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | Silicon Errata 1.153 has been fixed on OMAP 3630|4430 with the use of a later version of I2C IP block. The errata impacts OMAP 2420|2430|3430, enable the workaround for these based on I2C IP block revision number instead of OMAP CPU type Signed-off-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Vikram Pandita <vikram.pandita@ti.com Reviewed-by: Paul Walmsley <paul@pwsan.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-omap: ACK pending [R/X]DR and [R/X]RDY interruptsMoiz Sonasath2009-08-201-0/+3
| | | | | | | | | | | | | | | | | | | | ACK any pending read/write interrupts before exiting the ISR either after completing the operation [ARDY interrupt] or in case of an error [NACK|AL interrupt] Signed-off-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Vikram Pandita <vikram.pandita@ti.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-omap: Fix I2C status ACKNishanth Menon2009-08-201-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | I2C status ack for [RX]RDR and [RX]RDY could cause race conditions of clearing the event twice and a violation of the programing sequence as defined in TRM This patch fixes the same. Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* | Merge branch 'master' into for-linusRafael J. Wysocki2009-07-303-14/+35
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| * i2c-omap: OMAP3430 Silicon Errata 1.153Sonasath, Moiz2009-07-301-1/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When an XRDY/XDR is hit, wait for XUDF before writing data to DATA_REG. Otherwise some data bytes can be lost while transferring them from the memory to the I2C interface. Do a Busy-wait for XUDF, before writing data to DATA_REG. While waiting if there is NACK | AL, set the appropriate error flags, ack the pending interrupts and return from the ISR. Signed-off-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Vikram pandita <vikram.pandita@ti.com> [ben-linux@fluff.org: fixed mail format and added i2c-omap to subject] Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-omap: In case of a NACK|ARDY|AL return from the ISRSonasath, Moiz2009-07-301-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of a NACK or ARDY or AL interrupt, complete the request. There is no need to service the RRDY/RDR or XRDY/XDR interrupts. Refer TRM SWPU114: Figure 18-31.I2C Master Transmitter Mode, Interrupt Method, in F/S and HS Modes http://focus.ti.com/pdfs/wtbu/SWPU114T_PrelimFinalEPDF_06_25_2009.pdf Signed-off-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Vikram pandita <vikram.pandita@ti.com> [ben-linux@fluff.org: fixed mail format and added i2c-omap to subject] Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-omap: Bug in reading the RXSTAT/TXSTAT values from the I2C_BUFFSTAT registerSonasath, Moiz2009-07-301-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix bug in reading the I2C_BUFFSTAT register for getting byte count on RX/TX interrupt. On Interrupt: I2C_STAT[RDR], read 'RXSTAT' from I2C_BUFFSTAT[8-13] On Interrupt: I2C_STAT[XDR] read 'TXSTAT' from I2C_BUFFSTAT[0-5] Signed-off-by: Jagadeesh Pakaravoor <j-pakaravoor@ti.com> Signed-off-by: Moiz Sonasath <m-sonasath@ti.com> Signed-off-by: Vikram pandita <vikram.pandita@ti.com> [ben-linux@fluff.org: fixed mail format and added i2c-omap to subject] Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-sh_mobile: change module_init() to subsys_initcall()Magnus Damm2009-07-301-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert the i2c-sh_mobile i2c bus driver to use subsys_initcall() instead of module_init(). This change makes the driver register a bit earlier which together with earlier platform data moves the time for probe(). The earlier probe() makes it possible to use i2c_get_adapter() and i2c_transfer() from device_initcall(). The same strategy is used by other i2c bus drivers such as i2c-pxa.c and i2c-s3c2410.c. Signed-off-by: Magnus Damm <damm@igel.co.jp> [ben-linux@fluff.org: minor subject updaye] Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c: strncpy does not null terminate stringRoel Kluin2009-07-301-1/+1
| | | | | | | | | | | | | | strlcpy() will always null terminate the string. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
| * i2c-s3c2410: s3c24xx_i2c_init: don't clobber IICLC valuePeter Korsgaard2009-07-301-5/+0
| | | | | | | | | | | | | | | | | | s3c24xx_i2c_init() was overwriting the IICLC value set just above in s3c24xx_i2c_clockrate() with zero, effectively disabling the platform line control setting. Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* | Merge branch 'master' into for-linusRafael J. Wysocki2009-07-291-7/+10
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| * i2c/tsl2550: Fix lux value in dark environmentMichele Jr De Candia2009-07-281-7/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | I've tested TSL2550 driver and I've found a bug: when light is off, returned value from tsl2550_calculate_lux function is -1 when it should be 0 (sensor correctly read that light was off). I think the bug is that a zero c0 value (approximated value of ch0) is misinterpreted as an error. Signed-off-by: Michele Jr De Candia <michele.decandia@valueteam.com> Acked-by: Rodolfo Giometti <giometti@linux.it> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* | I2C: Rework i2c-s3c2410 suspend_late()/resume() V2Magnus Damm2009-07-221-9/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | This is V2 of the i2c-s3c2410 dev_pm_ops patch. The callbacks are converted for CONFIG_SUSPEND like this: suspend_late() -> suspend_noirq() resume() -> resume() Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* | I2C: Rework i2c-pxa suspend_late()/resume_early()Magnus Damm2009-07-221-8/+17
|/ | | | | | | | | | | | | | This patch reworks platform driver power management code for i2c-pxa from legacy late/early callbacks to dev_pm_ops. The callbacks are converted for CONFIG_SUSPEND like this: suspend_late() -> suspend_noirq() resume_early() -> resume_noirq() Signed-off-by: Magnus Damm <damm@igel.co.jp> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Acked-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
* i2c: Use resource_sizeJulia Lawall2009-07-154-8/+8
| | | | | | | | | | | | | | | | | | | | Use the function resource_size, which reduces the chance of introducing off-by-one errors in calculating the resource size. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ struct resource *res; @@ - (res->end - res->start) + 1 + resource_size(res) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c-davinci: behave with i2cdetectDavid Brownell2009-07-151-4/+14
| | | | | | | | | | Make i2c-davinci cope properly with "i2cdetect": don't spew syslog spam on perfectly normal behaviors, or respond to any address other than the one reserved for the SMBus host. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c-davinci: convert clock usage after clkdev conversionKevin Hilman2009-07-151-1/+1
| | | | | | | | | DaVinci core code has converted to the new clkdev API so clock name strings are not needed. Instead, just the a 'struct device' pointer is needed. Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* Remove multiple KERN_ prefixes from printk formatsJoe Perches2009-07-081-4/+5
| | | | | | | | | | | | | | Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up handling of log-levels and newlines") changed printk semantics. printk lines with multiple KERN_<level> prefixes are no longer emitted as before the patch. <level> is now included in the output on each additional use. Remove all uses of multiple KERN_<level>s in formats. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i2c: fix build bug in i2c-designware.cIngo Molnar2009-06-251-0/+1
| | | | | | | | | | | | | | | | | | | This build error triggers on x86: drivers/built-in.o: In function `i2c_dw_init': i2c-designware.c:(.text+0x4e37ca): undefined reference to `clk_get_rate' drivers/built-in.o: In function `dw_i2c_probe': i2c-designware.c:(.devinit.text+0x51f5e): undefined reference to `clk_get' i2c-designware.c:(.devinit.text+0x51f76): undefined reference to `clk_enable' i2c-designware.c:(.devinit.text+0x520ff): undefined reference to `clk_disable' i2c-designware.c:(.devinit.text+0x52108): undefined reference to `clk_put' Because this new driver uses the clk_*() facilities which is an ARM-only thing currently. Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i2c: driver for the Synopsys DesignWare I2C controllerBaruch Siach2009-06-243-0/+634
| | | | | | | | | The i2c Linux driver for the DesignWare i2c block of Synopsys, which is meant for AMBA Peripheral Bus. This i2c block is used on SoC chips like the ARM9 based PVG610. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c: Fix stuck transaction on cpm-i2c driverMichael Trimarchi2009-06-221-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When a process tries to read/write a disconnected i2c device, it receives a signal (e.g. ctrl-c) and the kernel gets stuck. BUG: soft lockup - CPU#0 stuck for 61s! [I2CEEpromTest:392] NIP: c01628f8 LR: c01628f0 CTR: c00177cc REGS: c39abd70 TRAP: 0901 Not tainted (2.6.25.7-alcore) MSR: 00009032 <EE,ME,IR,DR> CR: 42042048 XER: 20000000 TASK = c3889bd0[392] 'I2CEEpromTest' THREAD: c39aa000 GPR00: 00009000 c39abe20 c3889bd0 c39075c8 c39abe28 00000001 00000000 00000001 GPR08: c3889bd0 c39075c8 00009032 c39abe34 00002437 NIP [c01628f8] cpm_i2c_xfer+0x5fc/0x6d0 LR [c01628f0] cpm_i2c_xfer+0x5f4/0x6d0 Call Trace: [c39abe20] [c0162924] cpm_i2c_xfer+0x628/0x6d0 (unreliable) [c39abe90] [c015f6a0] i2c_transfer+0x88/0xb4 [c39abeb0] [c0160164] i2c_master_recv+0x48/0x6c [c39abed0] [c01618dc] i2cdev_read+0x50/0xe4 [c39abef0] [c0068b24] vfs_read+0xc4/0x108 [c39abf10] [c0068f4c] sys_read+0x4c/0x90 [c39abf40] [c000d348] ret_from_syscall+0x0/0x38 Instruction dump: 3bc00064 92610010 3bf201c8 92810014 3b61 This happen because though the wait_event_interruptible_timeout takes the signals into account, the driver does not handle them. We propose to change the wait_event_interruptible_timeout with wait_event_timeout, leaving the signals to be handled in other points on the upper layers. Signed-off-by: Bruno Morelli <bruno@evidence.eu.com> Signed-off-by: Michael Trimarchi <michael@evidence.eu.com> Acked-by: Jochen Friedrich <jochen@scram.de> [ben-linux@fluff.org: fix title for patch] Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* i2c-omap: Fix build breaking typo cpu_is_omap_2430Tony Lindgren2009-06-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Hi Ben, Can you please queue this fix? Thanks, Tony >From ffe2b2cdf6283770b70a197e3748c6b40a1006be Mon Sep 17 00:00:00 2001 From: Tony Lindgren <tony@atomide.com> Date: Wed, 17 Jun 2009 13:14:23 +0300 Subject: [PATCH] i2c-omap: Fix build breaking typo in cpu_is_omap_2430 Commit 84bf2c86 introduced a typo, it should be cpu_is_omap2430 instead. The typo was probably caused by a mismerge. Without this patch all omaps fail to build with: error: implicit declaration of function 'cpu_is_omap_2430' Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* Merge branch 'i2c-for-linus' of ↵Linus Torvalds2009-06-203-363/+205
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging * 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: i2c: New macro to initialize i2c address lists on the fly i2c: Don't advertise i2c functions when not available i2c: Use rwsem instead of mutex for board info i2c: Add a sysfs interface to instantiate devices i2c: Limit core locking to the necessary sections i2c: Kill the redundant client list i2c: Kill is_newstyle_driver i2c: Merge i2c_attach_client into i2c_new_device i2c: Drop i2c_probe function i2c: Get rid of the legacy binding model i2c: Kill client_register and client_unregister methods
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