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path: root/drivers/i2c/busses
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2007-03-04[ARM] Acorn: move the i2c bus driver into drivers/i2cRussell King
Move the Acorn IOC/IOMD I2C bus driver from drivers/i2c, strip out the reminants of the platform specific parts of the old PCF8583 RTC code, and remove the old obsolete PCF8583 driver. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivialLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/bunk/trivial: (25 commits) Documentation/kernel-docs.txt update. arch/cris: typo in KERN_INFO Storage class should be before const qualifier kernel/printk.c: comment fix update I/O sched Kconfig help texts - CFQ is now default, not AS. Remove duplicate listing of Cris arch from README kbuild: more doc. cleanups doc: make doc. for maxcpus= more visible drivers/net/eexpress.c: remove duplicate comment add a help text for BLK_DEV_GENERIC correct a dead URL in the IP_MULTICAST help text fix the BAYCOM_SER_HDX help text fix SCSI_SCAN_ASYNC help text trivial documentation patch for platform.txt Fix typos concerning hierarchy Fix comment typo "spin_lock_irqrestore". Fix misspellings of "agressive". drivers/scsi/a100u2w.c: trivial typo patch Correct trivial typo in log2.h. Remove useless FIND_FIRST_BIT() macro from cardbus.c. ...
2007-02-19Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (117 commits) [ARM] 4058/2: iop32x: set ->broken_parity_status on n2100 onboard r8169 ports [ARM] 4140/1: AACI stability add ac97 timeout and retries [ARM] 4139/1: AACI record support [ARM] 4138/1: AACI: multiple channel support for IRQ handling [ARM] 4211/1: Provide a defconfig for ns9xxx [ARM] 4210/1: base for new machine type "NetSilicon NS9360" [ARM] 4222/1: S3C2443: Remove reference to missing S3C2443_PM [ARM] 4221/1: S3C2443: DMA support [ARM] 4220/1: S3C24XX: DMA system initialised from sysdev [ARM] 4219/1: S3C2443: DMA source definitions [ARM] 4218/1: S3C2412: fix CONFIG_CPU_S3C2412_ONLY wrt to S3C2443 [ARM] 4217/1: S3C24XX: remove the dma channel show at startup [ARM] 4090/2: avoid clash between PXA and SA1111 defines [ARM] 4216/1: add .gitignore entries for ARM specific files [ARM] 4214/2: S3C2410: Add Armzone QT2410 [ARM] 4215/1: s3c2410 usb device: per-platform vbus_draw [ARM] 4213/1: S3C2410 - Update definition of ADCTSC_XY_PST [ARM] 4098/1: ARM: rtc_lock only used with rtc_cmos [ARM] 4137/1: Add kexec support [ARM] 4201/1: SMP barriers pair needed for the secondary boot process ... Fix up conflict due to typedef removal in sound/arm/aaci.h
2007-02-18Merge the easy part of the IOP branchRussell King
2007-02-17Replace remaining references to "driverfs" with "sysfs".Robert P. J. Day
Globally, s/driverfs/sysfs/g. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2007-02-14[PATCH] remove many unneeded #includes of sched.hTim Schmielau
After Al Viro (finally) succeeded in removing the sched.h #include in module.h recently, it makes sense again to remove other superfluous sched.h includes. There are quite a lot of files which include it but don't actually need anything defined in there. Presumably these includes were once needed for macros that used to live in sched.h, but moved to other header files in the course of cleaning it up. To ease the pain, this time I did not fiddle with any header files and only removed #includes from .c-files, which tend to cause less trouble. Compile tested against 2.6.20-rc2 and 2.6.20-rc2-mm2 (with offsets) on alpha, arm, i386, ia64, mips, powerpc, and x86_64 with allnoconfig, defconfig, allmodconfig, and allyesconfig as well as a few randconfigs on x86_64 and all configs in arch/arm/configs on arm. I also checked that no new warnings were introduced by the patch (actually, some warnings are removed that were emitted by unnecessarily included header files). Signed-off-by: Tim Schmielau <tim@physik3.uni-rostock.de> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-02-14[ARM] 4184/1: iop: cp6 access handler (undef_hook)Dan Williams
Enable svc access to cp6 via an undefined instruction hook. Do not enable access for usr code. This patch also makes iop13xx select PLAT_IOP, this requires a small change to drivers/i2c/busses/i2c-iop3xx.c. Per Lennert Buytenhek's note, the cp6 trap routine is moved to arch/arm/plat-iop Per Nicolas Pitre's note, the cp_wait is skipped since the latency to return to the faulting function is longer than cp_wait. Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-02-13i2c: Declare more i2c_adapter parent devicesJean Delvare
Declare the parent device of i2c_adapter devices each time we can easily do so. It makes the i2c_adapter appear at the right place in the device tree, rather than as a platform device. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Len Brown <len.brown@intel.com> Cc: Jordan Crouse <jordan.crouse@amd.com> Cc: Jody McIntyre <scjody@modernduck.com> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Cc: v4l-dvb-maintainer@linuxtv.org Cc: Petr Vandrovec <vandrove@vc.cvut.cz>
2007-02-13i2c: PA Semi SMBus driverOlof Johansson
New driver for the PA Semi SMBus interfaces. Signed-off-by: Olof Johansson <olof@lixom.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c-amd8111: Proposed cleanupsJean Delvare
Proposed cleanups to the i2c-amd8111 SMBus driver: * Fold long lines. * Add an explicit mask when writing the low byte of a word. * Use I2C_SMBUS_BLOCK_MAX instead of hardcoding 32. * Discard extra blank lines. * Use boolean not instead of bitwise not for bit tests, it's clearer. * Return -EBUSY rather than -1 on I/O resource conflict. * Fix a race on device registration, initialization should be done before the bus is registered. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c-parport: Add support for One For All remote JP1 interfaceJonathan McDowell
This simple patch adds support to i2c-parport for the One For All remote JP1 parallel port interfaces which can be found detailed at: http://www.hifi-remote.com/jp1/hardware.shtml These allow access to the internal configuration EEPROM on various remote controls and there are a variety of Windows tools that make use of this hardware. I have tested this patch with the "simple" parallel port device and a One For All URC-7562 and confirmed that the data read using the eeprom i2c driver matches that returned by the Windows "IR" JP1 tool. Signed-off-by: Jonathan McDowell <noodles@earth.li> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c-viapro: Add support for the VIA CX700 south bridgeJean Delvare
We do not have any documentation for the CX700, but it was reported to work fine. Thanks to Claas Langbehn for testing. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c: Add IDs to adaptersStephen Hemminger
IDs have been defined but not used by most of the I2C adapters. By having a unique ID, clients can check for correct connection during probe. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c: completion header cleanupsJean Delvare
i2c-core and i2c-isa use completions without including <linux/completion.h>. Fix it. i2c-powermac includes <linux/completion.h> but doesn't use any completion. Fix it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Brownell <david-b@pacbell.net>
2007-02-13i2c-i801: Spelling fixJean Delvare
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c-piix4: Add support for the ATI SB600Jean Delvare
Add support for the ATI SB600 SMBus controller. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-02-13i2c-nforce2: Drop unused reference to pci_devJean Delvare
Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Hans-Frieder Vogt <hfvogt@gmx.net>
2007-02-13i2c-ali1563: Fix device initializationJean Delvare
The i2c-ali1563 initialization looks quite broken to me: * If the I/O space isn't enabled, we forcibly set 3 bits in the PCI configuration space instead of just the one enabling the I/O space. * After that we pretend to check if the write worked, but we don't actually read the new value from the register. * It's probably not a good idea to enable the I/O space if no base address has been set. So I propose the following changes to that part of the driver: * Merge ali1563_enable() into ali1563_setup(). * Check the base address before the I/O space enabled bit. Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Rudolf Marek <r.marek@assembler.cz>
2007-02-13i2c-ali1563: Improve the status messagesJean Delvare
Improve the status messages printed by the i2c-ali1563 driver. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Rudolf Marek <r.marek@assembler.cz>
2007-02-08[ARM] 4144/1: Fix for patch #4099/1 with CONFIG_I2C_PXA_SLAVE setGuennadi Liakhovetski
Switch the i2c-pxa driver to actually using the platform device information and let it handle the power i2c bus on pxa27x too. Original version of this patch didn't compile with CONFIG_I2C_PXA_SLAVE set. Signed-off-by: G. Liakhovetski <gl@dsa-ac.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2007-01-05i2c-mv64xxx: Fix random oops at bootMaxime Bizon
I have a Marvell board which has the same i2c hw block than mv64xxx, so I'm trying to use i2c-mv64xxx driver. But I get the following random oops at boot: Unable to handle kernel NULL pointer dereference at virtual address 00000002 Backtrace: [<c0397e4c>] (mv64xxx_i2c_intr+0x0/0x2b8) from [<c02879c4>] (__do_irq+0x4c/0x8c) [<c0287978>] (__do_irq+0x0/0x8c) from [<c0287c0c>] (do_level_IRQ+0x68/0xc0) r8 = C0501E08 r7 = 00000005 r6 = C0501E08 r5 = 00000005 r4 = C048BB78 [<c0287ba4>] (do_level_IRQ+0x0/0xc0) from [<c02885f8>] (asm_do_IRQ+0x50/0x134) r6 = C0449C78 r5 = F1020000 r4 = FFFFFFFF [<c02885a8>] (asm_do_IRQ+0x0/0x134) from [<c02869c4>] (__irq_svc+0x24/0x100) r8 = C1CAC400 r7 = 00000005 r6 = 00000002 r5 = F1020000 r4 = FFFFFFFF [<c0287efc>] (setup_irq+0x0/0x124) from [<c02880d0>] (request_irq+0xb0/0xd0) r7 = C041B2AC r6 = C0397E4C r5 = 00000000 r4 = 00000005 [<c0288020>] (request_irq+0x0/0xd0) from [<c03985f4>] (mv64xxx_i2c_probe+0x148/0x244) [<c03984ac>] (mv64xxx_i2c_probe+0x0/0x244) from [<c038bedc>] (platform_drv_probe+0x20/0x24) The oops is caused by a spurious interrupt that occurs when request_irq is called. mv64xxx_i2c_fsm() tries to read drv_data->msg, which is NULL. I noticed that hardware init is done after requesting irq. Thus any pending irq from previous hardware usage may cause this. The following patch fixes it: Signed-off-by: Maxime Bizon <mbizon@freebox.fr> Acked-by: Mark A. Greer <mgreer@mvista.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-01-04i2c-pnx: Fix interrupt handler, get rid of EARLY config optionVitaly Wool
This fixes two issues raised by David Brownell on the i2c list: << Someone needs to update i2c-pnx.c to handle the IRQ handler doesn't expect pt_regs (gone now for a while), and so it doesn't try to reference "mudule_init()" if I2C isn't initialized "early". For that matter, to get rid of that _option_ to initialize then, and always init that driver with subsystem_init() ... it's common with embedded systems to need I2C access to tweak a GPIO expander or do some other work when bringing up drivers, that's not specific to USB stacks. >> Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-13Merge branch 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6Linus Torvalds
* 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: hwmon: Add MAINTAINERS entry for new ams driver hwmon: New AMS hardware monitoring driver hwmon/w83793: Add documentation and maintainer hwmon: New Winbond W83793 hardware monitoring driver hwmon: Update Rudolf Marek's e-mail address hwmon/f71805f: Fix the device address decoding hwmon/f71805f: Always create all fan inputs hwmon/f71805f: Add support for the Fintek F71872F/FG chip hwmon: New PC87427 hardware monitoring driver hwmon/it87: Remove the SMBus interface support hwmon/hdaps: Update the list of supported devices hwmon/hdaps: Move the DMI detection data to .data hwmon/pc87360: Autodetect the VRM version hwmon/f71805f: Document the fan control features hwmon/f71805f: Add support for "speed mode" fan speed control hwmon/f71805f: Support DC fan speed control mode hwmon/f71805f: Let the user adjust the PWM base frequency hwmon/f71805f: Add manual fan speed control hwmon/f71805f: Store the fan control registers
2006-12-12hwmon: Update Rudolf Marek's e-mail addressJean Delvare
The Silicon Hill club is not what it used to be. Signed-off-by: Rudolf Marek <r.marek@assembler.cz> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: Fix OMAP clock prescaler to match the commentJean Delvare
Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Tony Lindgren <tony@atomide.com>
2006-12-10i2c: Enable PEC on more i2c-i801 devicesJean Delvare
Enable PEC on recent Intel SMBus controllers (ICH6, ICH7, ICH8, ICH9 and ESB2.) Signed-off-by: Jean Delvare <khali@linux-fr.org> Acked-by: Jason Gaston <jason.d.gaston@intel.com>
2006-12-10i2c: Discard the i2c algo del_bus wrappersJean Delvare
They are all only calling i2c_del_adapter, so we may as well do it directly. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: New ARM Versatile/Realview bus driverRussell King
Add support for the I2C bus found on the ARM Versatile and Realview platforms. The I2C bus has a RTC and optionally some EEPROMs attached. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: New Atmel AT91 bus driverAndrew Victor
Add support for the I2C (Two-wire interface) controller integrated in the Atmel AT91RM9200 processor. This driver should also be usable on the Atmel AT91SAM9261 and AT91SAM9260 processors. Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Mark M. Hoffman <mhoffman@lightlink.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: Cleanups to the i2c-nforce2 bus driverHans-Frieder Vogt
Summary of changes: - fixes: o legacy I/O region size is 64 bytes, not 8 bytes - general cleanup: o removed code for the unsupported I2C block data, block data, proc call and block proc call transfer modes o removed detail warnings about unsupported modes that are covered in a general warning (unsupported transaction...) anyway o removed necessity of a definition of struct i2c_adapter o moved definition of struct i2c_algorithm, making forward declarations of nforce2_access and nforce2_func unnecessary - minor changes: o in the description mention the nForce 5xx chipsets o changes my e-mail address in MODULE_AUTHOR Theses cleanups shrink the driver binary size from 4.0 kB to 2.7 kB on i386. Signed-off-by: Hans-Frieder Vogt <hfvogt@gmx.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: Add request/release_mem_region to i2c-ibm_iic bus driverJean-Baptiste Maneyrol
Reserving I/O memory for a driver with request_mem_region is necessary to avoid memory access conflicts. Even if it's never going to happen, it is cleaner and it allows to monitor I/O memory used in /proc/iomem. Signed-off-by: Jean-Baptiste Maneyrol <jean-baptiste.maneyrol@teamlog.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: New Philips PNX bus driverVitaly Wool
New I2C bus driver for Philips ARM boards (Philips IP3204 I2C IP block). This I2C controller can be found on (at least) PNX010x, PNX52xx and PNX4008 Philips boards. Signed-off-by: Vitaly Wool <vitalywool@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2006-12-10i2c: Delete the broken i2c-ite bus driverJean Delvare
The rest of the ITE8172 support was already removed from MIPS tree. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Acked-by: Ralf Baechle <ralf@linux-mips.org>
2006-12-07Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds
* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (76 commits) [ARM] 4002/1: S3C24XX: leave parent IRQs unmasked [ARM] 4001/1: S3C24XX: shorten reboot time [ARM] 3983/2: remove unused argument to __bug() [ARM] 4000/1: Osiris: add third serial port in [ARM] 3999/1: RX3715: suspend to RAM support [ARM] 3998/1: VR1000: LED platform devices [ARM] 3995/1: iop13xx: add iop13xx support [ARM] 3968/1: iop13xx: add iop13xx_defconfig [ARM] Update mach-types [ARM] Allow gcc to optimise arm_add_memory a little more [ARM] 3991/1: i.MX/MX1 high resolution time source [ARM] 3990/1: i.MX/MX1 more precise PLL decode [ARM] 3986/1: H1940: suspend to RAM support [ARM] 3985/1: ixp4xx clocksource cleanup [ARM] 3984/1: ixp4xx/nslu2: Fix disk LED numbering (take 2) [ARM] 3994/1: ixp23xx: fix handling of pci master aborts [ARM] 3981/1: sched_clock for PXA2xx [ARM] 3980/1: extend the ARM Versatile sched_clock implementation from 32 to 63 bit [ARM] 3979/1: extend the SA11x0 sched_clock implementation from 32 to 63 bit period [ARM] 3978/1: macro to provide a 63-bit value from a 32-bit hardware counter ...
2006-12-07[ARM] Merge individual ARM sub-treesRussell King
Merge: Atmel AT91RM9200 and AT91SAM9260 changes General ARM developments Disconfiguous memory cleanups 64-bit/32-bit division and sched_clock extension patches EP93xx support changes IOP support changes Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-07[ARM] 3995/1: iop13xx: add iop13xx supportDan Williams
The iop348 processor integrates an Xscale (XSC3 512KB L2 Cache) core with a Serial Attached SCSI (SAS) controller, multi-ported DDR2 memory controller, 3 Application Direct Memory Access (DMA) controllers, a 133Mhz PCI-X interface, a x8 PCI-Express interface, and other peripherals to form a system-on-a-chip RAID subsystem engine. The iop342 processor replaces the SAS controller with a second Xscale core for dual core embedded applications. The iop341 processor is the single core version of iop342. This patch supports the two Intel customer reference platforms iq81340mc for external storage and iq81340sc for direct attach (HBA) development. The developer's manual is available here: ftp://download.intel.com/design/iio/docs/31503701.pdf Changelog: * removed virtual addresses from resource definitions * cleaned up some unnecessary #include's Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-12-01i2c-i801: SMBus patch for Intel ICH9Jason Gaston
This updated patch adds the Intel ICH9 LPC and SMBus Controller DID's. Thi= s patch relies on the irq ICH9 patch to pci_ids.h. Signed-off-by: Jason Gaston <jason.d.gaston@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-11-30[ARM] Remove EEPROM slave emulation from i2c-pxa driver.Russell King
The i2c-pxa driver should not contain EEPROM slave-mode emulation; this is something the platform should provide where required. Remove it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-11-23[PATCH] Fix i2c-ixp4xx compile (missing brace)Jean Delvare
Fix recent i2c-ixp4xx compilation breakage. Sorry for overlooking it. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-20[PATCH] scx200_acb: handle PCI errorsJeff Garzik
Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-20[PATCH] i2c-ixp4xx: fix ") != 0))" typoAlexey Dobriyan
i2c_bit_add_bus() returns -E; -E != 0 => err = 1 probe fails with positive error code Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Cc: Deepak Saxena <dsaxena@mvista.com> Acked-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-10-28[ARM] Fix i2c-pxa slave mode supportRussell King
i2c-pxa times out when trying to enable slave mode due to an incorrect test. Also, check that i2c->slave is non-NULL before dereferencing it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2006-10-18hwmon: Let w83781d and lm78 load againJean Delvare
Let the w83781d and lm78 hardware monitoring drivers load even when no chip was detected at the ISA address. There can still be supported chips connected to an I2C bus or SMBus. This fixes bug #7293. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2006-10-10[POWERPC] Fix i2c-powermac platform device usageBenjamin Herrenschmidt
i2c-powermac was written & merged right after Russell King's changes adding platform_driver... which I missed. Thus it still used struct device, causing crashes when hitting sleep/wakeup callbacks (it happened to work by luck so far, until early/late callbacks got added). This causes crashes on sleep/wakeup on PowerBooks with 2.6.19. The patch fixes it by using a proper platform_driver. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-04Remove all inclusions of <linux/config.h>Dave Jones
kbuild explicitly includes this at build time. Signed-off-by: Dave Jones <davej@redhat.com>
2006-10-03fix file specification in commentsUwe Zeisberger
Many files include the filename at the beginning, serveral used a wrong one. Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com> Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-03Fix several typos in drivers/Matt LaPlante
Signed-off-by: Adrian Bunk <bunk@stusta.de>
2006-10-01[PATCH] proper flags type of spin_lock_irqsave()Alexey Dobriyan
Convert various spin_lock_irqsave() callers to correctly use `unsigned long'. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Acked-by: Kyle McMartin <kyle@mcmartin.ca> Cc: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-29[PATCH] i2c-sibyte: Fix modular build breakageYoichi Yuasa
Fix undefined reference in i2c_sibyte_exit(). drivers/built-in.o: In function `i2c_sibyte_exit': i2c-sibyte.c:(.exit.text+0x368): undefined reference to `i2c_del_bus' i2c-sibyte.c:(.exit.text+0x368): relocation truncated to fit: R_MIPS_26 against `i2c_del_bus' i2c-sibyte.c:(.exit.text+0x38c): undefined reference to `i2c_del_bus' i2c-sibyte.c:(.exit.text+0x38c): relocation truncated to fit: R_MIPS_26 against `i2c_del_bus' Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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