summaryrefslogtreecommitdiff
AgeCommit message (Collapse)AuthorFilesLines
2007-05-05SONIC: small fix and cleanupFinn Thain3-12/+16
Fix a potential problem in the timeout handling: don't free the DMA buffers before resetting the chip. Also a trivial cleanup. Bring macsonic and jazzsonic into sync. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: macmace fixesFinn Thain3-235/+364
Fix a race condition in the transmit code, where the dma interrupt could update the free tx buffer count concurrently and wedge the tx queue. Fix the misuse of the rx frame status and rx frame length registers: no more "fifo overrun" errors caused by the OFLOW bit being tested in the frame length register (instead of the status register), and no more missed packets due to incorrect length taken from status register (instead of the frame length register). Fix a panic (skb_over_panic BUG) caused by allocating and then copying an incoming packet while the packet length register was changing. Cut-and-paste the reset code from the powermac mace driver (mace.c), so the NIC functions when MacOS does not initialise it (important for anyone wanting to use the Emile boot loader). Cut-and-paste the error counting and timeout recovery code from mace.c. Fix over allocation of rx buffer memory (it's page order, not page count). Converted to driver model. Converted to DMA API. Since I've run out of ways to make it fail, and since it performs well now, promote the driver from EXPERIMENTAL status. Tested on both quadra 840av and 660av. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05CUDA ADB fixesFinn Thain1-26/+32
Fix the flakiness in the CUDA ADB driver on m68k macs (keypresses getting wedged down or ADB just going AWOL altogether). The only IRQ used by this driver is the VIA shift register IRQ. The PowerMac conditional code disables the other VIA IRQ sources, so don't mess with the other IRQ flags in the common code -- m68k macs need them. When polling, don't disable local interrupts when we only need to disable the CUDA interrupt. Unless polling, don't clear the shift register IRQ flag. On m68k macs this creates a race that often breaks CUDA ADB. Tested on Quadra 840av and LC630 (both m68k); also Beige G3 (powerpc). Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac II ADB fixesFinn Thain2-341/+251
Fix a crash caused by requests placed in the queue with the completed flag already set. This lead to some ADB_SYNC requests returning early and their request structs being popped off the stack while still queued. Stack corruption ensued or an invalid request callback pointer was invoked or both. Eliminate macii_retransmit() and its buggy implementation of macii_write(). Have macii_queue_poll() fully initialise the request queues. Fix a bug in macii_queue_poll() where the last_req pointer was not being set. This caused some requests to leave the queue before being completed (and would also corrupt the stack under certain conditions). Fix a race in macii_start that could set the state machine to "reading" while current_req was null. No longer send poll commands with the ADBREQ_REPLY flag -- doing that caused the replies to be stored in the request buffer where they were forgotten about. Don't autopoll by continuously sending new Talk commands. Get the controller to do that for us. This reduces the ADB interrupt rate on an idle bus to about 5 per second. Only autopoll the devices that were probed. Explicitly clear the interrupt flag when polling. Use disable_irq rather than local_irq_save when polling. Remove excess local_irq_save/restore pairs. Improve bus timeout and service request detection. Remove unused code (last_reply, adb_dir etc) and unneeded code (prefix_len, first_byte etc). Change TIP and TACK to their correct names on this ADB controller (ST_EVEN and ST_ODD). Add some commentry. Add a generous quantity of sanity checks (BUG_ONs). Let m68k macs use the adb_sync boot param too. Tested on Mac II, Mac IIci, Quadra 650, Quadra 700 etc. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac IRQ cleanupFinn Thain4-29/+7
There are no slow IRQs on Macs since Roman Zippel's IRQ reorganisation that went into 2.6.16 and removed mac_irq_list[] and the do_mac_irq_list() dispatcher. (They were implemented in do_mac_irq_list() by lowering the IPL.) Hence there's no more use for mutual exclusion in the Mac interrupt dispatchers. Remove it. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac nubus IRQ fixes (plan E)Finn Thain1-61/+80
Some Macs lack a slot interrupt enable register. So the existing code makes disabled and unregistered slot IRQ lines outputs set high. This seems to work on quadras, but does not work on genuine VIAs (perhaps the card still succeeds in pulling the line low, or perhaps because this increases the settle time on the port A input, meaning that the CA1 IRQ could fire before the slot line reads active). Because of this, the nubus_active flags were used to mask IRQs, which is actually worse than the problem it tries to solve. Any interrupt masked by nubus_active will remain asserted and prevent further transitions on CA1. And so the nubus gets wedged regardless of hardware (emulated VIA ASIC, real VIA chip or RBV). The best solution to this hardware limitation of genuine VIAs is to disable the umbrella SLOTS IRQ when disabling a slot on those machines. Unfortunately, this means all slot IRQs get disabled when any slot IRQ is disabled. But it is only a problem when there's more than 1 device using nubus interrupts. Another potential problem for genuine VIAs is an unregistered nubus IRQ. Eventually it will be possible to enable the CA1 interrupt by installing its handler only _after_ all nubus drivers have loaded but _before_ the kernel needs them, at which time this last problem can be fixed. For now it can be worked around: - disable MacOS extensions - don't boot MacOS (use the Emile bootloader instead) - get the bootloaders to disable ROM drivers (Penguin does this for video cards already, don't know about Emile) - physically remove unsupported cards Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac IRQ prepFinn Thain4-69/+111
Make sure that there are no slot IRQs asserted before leaving the nubus handler. If there are and we don't then the nubus gets wedged because this prevents a CA1 transition, which means no more nubus IRQs. Make the interrupt dispatch loops terminate sooner. Explicitly initialise the VIA latches to make the code more easily understood. Also some cleanups. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: reverse Mac IRQ damageFinn Thain4-6/+6
Reverse the last of a monumental brown-paper-bag commit that went into the 2.3 kernel. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac DP8390 updateFinn Thain1-70/+175
Fix the support for C/NET nubus ethernet cards etc. Sync up the DP8390 driver with the latest code in the mac68k repo. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05NuBus header updateFinn Thain2-52/+76
Sync the nubus defines with the latest code in the mac68k repo. Some of these are needed for DP8390 driver update in the next patch. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac interrupt prioritiesFinn Thain1-0/+6
Add some more machines that support A/UX interrupt priorities. There are probably others as well, but I've only tested these ones so far. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: remove unused adb.hFinn Thain1-75/+0
The asm-m68k/adb.h header is unused. Some definitions are wrong and the rest are duplicated in linux/adb.h. Remove it. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Amiga A2065 and Ariadne TX statisticsGeert Uytterhoeven2-3/+2
Add missing code to the Amiga A2065 and Ariadne drivers to update net_device_stats.tx_bytes. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: pmu_queue_request() declaration conflictFinn Thain1-2/+1
Fixes a "static qualifier follows non-static qualifier" error from gcc 4. Signed-off-by: Finn Thain <fthain@telegraphics.com.au> Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Atari SCSI workqueue updatesGeert Uytterhoeven1-2/+2
Workqueue updates for the Atari SCSI driver Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Correct number of interrupts for Sun3Sam Creasey1-1/+1
Only attempt to initialize the amount of interrupts a sun3 actually has... Signed-off-by: Sam Creasey <sammy@sammy.net> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: early parameter supportRoman Zippel8-106/+77
Add early parameter support and convert current users to it. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05hilkbd: Kill compiler warning and fix comment dyslexiaGeert Uytterhoeven1-1/+1
hilkbd: Kill compiler warning and fix comment dyslexia Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: reformat various m68k filesRoman Zippel10-1925/+1865
Reformat various m68k files, so they actually look like Linux sources. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05lockdep: Add missing disable/enable irq variantRoman Zippel1-1/+5
Add missing disable/enable irq variant Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Mac89x0 Ethernet netif updatesMatthias Urlichs2-57/+33
Macintosh CS89x0 Ethernet: Netif updates Addition of netif_stop_queue() before transmission by Michael Schmitz skb_copy_{from,to}_linear_data() conversion by Geert Uytterhoeven Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: CROSS_COMPILE = m68k-linux-gnu-Geert Uytterhoeven1-1/+1
Recent cross-compilers are called m68k-linux-gnu-gcc instead of m68k-linux-gcc Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Atari fb revivalMichael Schmitz9-1316/+2987
Update the atari fb to 2.6 by Michael Schmitz, Reformatting and rewrite of bit plane functions by Roman Zippel, A few more fixes by Geert Uytterhoeven. Signed-off-by: Michael Schmitz <schmitz@debian.org> Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Atari keyboard and mouse support.Michael Schmitz11-0/+1059
Atari keyboard and mouse support. (reformating and Kconfig fixes by Roman Zippel) Signed-off-by: Michael Schmitz <schmitz@debian.org> Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Atari SCSI driver compile fixesRoman Zippel3-134/+49
Atari SCSI driver compile fixes Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Reformat the Atari SCSI driverRoman Zippel2-2375/+2373
Reformat the Atari SCSI driver Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05m68k: Atari SCSI revivalMichael Schmitz4-17/+77
SCSI should be working on a TT (but someone should really try!) but causes trouble on a Falcon (as in: it ate a filesystem of mine) at least when used concurrently with IDE. I have the notion it's because locking of the ST-DMA interrupt by IDE is broken in 2.6 (the IDE driver always complains about trying to release an already-released ST-DMA). Needs more work, but that's on the IDE or m68k interrupt side rather than SCSI. Signed-off-by: Michael Schmitz <schmitz@debian.org> Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05Merge branch 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6Linus Torvalds61-870/+2879
* 'i2c-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: (44 commits) i2c-s3c2410: Fix bug in releasing driver i2c-s3c2410: Fix I2C SDA to SCL setup time i2c: New i2c-tiny-usb bus driver i2c: Documentation update i2c: SPIN_LOCK_UNLOCKED cleanup i2c: Obsolete i2c-ixp2000, i2c-ixp4xx and scx200_i2c i2c: New Simtec I2C bus driver i2c: Bitbanging I2C bus driver using the GPIO API Use menuconfig objects - I2C i2c: Restore i2c_smbus_read_block_data i2c-pxa: Clean transaction stop i2c-algo-bit: Improve debugging i2c-algo-bit: Implement a 50/50 SCL duty cycle i2c-omap: Switch to static adapter numbering i2c: Blackfin Two Wire Interface driver i2c-algo-sgi: Comment and whitespace cleanups i2c: Make i2c_del_driver a void function i2c: Move i2c-isa-only exported symbol declarations i2c: Document i2c_new_device() i2c: Add i2c_new_probed_device() ... Fixed trivial conflict in Documentation/feature-removal-schedule.txt manually. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05MAINTAINER change for Connect Tech IncStuart MacDonald2-3/+3
I am no longer with CTI. The Support Department will handle all inquiries regarding the WH. Signed-off-by: Stuart MacDonald <stuartm@connecttech.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-05Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreqLinus Torvalds10-143/+101
* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] Report the number of processors in PowerNow-k8 correctly [CPUFREQ] do not declare undefined functions [CPUFREQ] cleanup kconfig options [CPUFREQ] Longhaul - Revert Longhaul ver. 2 [CPUFREQ] Remove deprecated /proc/acpi/processor/performance write support [CPUFREQ] Fix limited cpufreq when booted on battery Fix preemption warnings in speedstep-centrino.c [CPUFREQ] Longhaul - Correct PCI code [CPUFREQ] p4-clockmod: switch to rdmsr_on_cpu/wrmsr_on_cpu
2007-05-05Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgartLinus Torvalds9-158/+201
* master.kernel.org:/pub/scm/linux/kernel/git/davej/agpgart: [AGPGART] sworks-agp: Switch to PCI ref counting APIs [AGPGART] Nvidia AGP: Use refcount aware PCI interfaces [AGPGART] Fix sparse warning in sgi-agp.c [AGPGART] Intel-agp adjustments [AGPGART] Move [un]map_page_into_agp into asm/agp.h [AGPGART] Add missing calls to global_flush_tlb() to ali-agp [AGPGART] prevent probe collision of sis-agp and amd64_agp
2007-05-04[S390] add hardware capability support (ELF_HWCAP).Martin Schwidefsky3-6/+120
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] tape: New read configuration data.Michael Holzheu4-5/+32
Instead of the deprecated read_conf_data(), implement a new function tape_3590_read_dev_chars(). Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] qeth: New read configuration data.Cornelia Huck3-5/+76
Instead of the deprecated read_conf_data(), implement a new function qeth_read_conf_data(). Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] dasd: New read device characteristics and read configuration data.Cornelia Huck4-4/+126
Instead of the deprecated read_dev_chars() and read_conf_data_lpm(), implement dasd_generic_read_dev_chars() and dasd_eckd_read_conf_lpm(). These should even recover better from error than the original cio functions. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] cio: Deprecate read_dev_chars() and read_conf_data{,_lpm}().Cornelia Huck2-3/+20
These helper functions are a leftover from 2.4 sync I/O and are a notorious source for bugs. They lead to device driver specific code creeping into cio, and some issues can't really be fixed at all. Device drivers can easily implement those functions themselves in a more robust manner, so let's get rid of them. Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] qdio: make qdio statistics SMP-capableUrsula Braun2-118/+174
Use atomic_t/atomic64_t to make qdio performance statistics smp safe. Remove temporarily calculation of "total time of inbound actions". Signed-off-by: Ursula Braun <braunu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] Export uaccess as non-gpl symbol.Martin Schwidefsky1-1/+1
Commit c1821c2e9711adc3cd298a16b7237c92a2cee78d introduced the uaccess structure that is used to select the correct set of user copy functions for the different execution modes (standard vs. noexec vs. z9 optimized user copy). The uaccess symbol is exported with EXPORT_SYMBOL_GPL. This breaks all non-gpl modules that use user copy. To make them work again change the export to EXPORT_SYMBOL. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] aes-s390 key length.Jan Glauber1-4/+11
Register aes-s390 algorithms with the actual supported max keylen size Signed-off-by: Jan Glauber <jan.glauber@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-04[S390] get rid of kprobes notifier call chain.Christoph Hellwig4-44/+33
And here's a port of the powerpc patch to get rid of the notifier chain completely to s390. It's ontop of Martins patch as that one is in mainline already. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2007-05-02i2c-s3c2410: Fix bug in releasing driverBen Dooks1-36/+34
When compiled as a module, the i2c-s3c2410 driver does not free either the IRQ or the i2c adapter it attached to the system. As part of this fix, move to the usual kernel style of freeing items as part of the probe error path making the remove process easier. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c-s3c2410: Fix I2C SDA to SCL setup timeBen Dooks1-6/+20
Fix the setup time for SDA to SCL due to the way the S3C24XX I2C controller works. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c: New i2c-tiny-usb bus driverTill Harbaum4-0/+296
Add a driver for the i2c-tiny-usb interface. This is a simple do-it-yourself USB to I2C interface targeted at experimental and home use. See the i2c-tiny-usb homepage for hardware details: http://www.harbaum.org/till/i2c_tiny_usb Signed-off-by: Till Harbaum <till@harbaum.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c: Documentation updateJean Delvare2-271/+39
Make the documentation on how to write and port i2c drivers more in line with the current state of things: * i2c-isa is deprecated and soon gone, so stop advertising it. * Drop many sensors-specific references. Most of them were outdated anyway. * Update the example code to reflect the recent and not-so-recent API and coding style preference changes. * Simplify the example init and cleanup functions. This should make things less complex to understand for newcomers. Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c: SPIN_LOCK_UNLOCKED cleanupMilind Arun Choudhary2-2/+2
SPIN_LOCK_UNLOCKED cleanup, use __SPIN_LOCK_UNLOCKED instead. Signed-off-by: Milind Arun Choudhary <milindchoudhary@gmail.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c: Obsolete i2c-ixp2000, i2c-ixp4xx and scx200_i2cJean Delvare2-3/+20
The new generic i2c-gpio driver should be used instead. The obsolete drivers will be removed in September 2007. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Deepak Saxena <dsaxena@plexity.net> Cc: Jordan Crouse <jordan.crouse@amd.com>
2007-05-02i2c: New Simtec I2C bus driverBen Dooks3-0/+199
Platform driver for the Simtec CPLD based simple I2C logic. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c: Bitbanging I2C bus driver using the GPIO APIHaavard Skinnemoen5-0/+267
This is a very simple bitbanging I2C bus driver utilizing the new arch-neutral GPIO API. Useful for chips that don't have a built-in I2C controller, additional I2C busses, or testing purposes. To use, include something similar to the following in the board-specific setup code: #include <linux/i2c-gpio.h> static struct i2c_gpio_platform_data i2c_gpio_data = { .sda_pin = GPIO_PIN_FOO, .scl_pin = GPIO_PIN_BAR, }; static struct platform_device i2c_gpio_device = { .name = "i2c-gpio", .id = 0, .dev = { .platform_data = &i2c_gpio_data, }, }; Register this platform_device, set up the I2C pins as GPIO if required and you're ready to go. This will use default values for udelay and timeout, and will work with GPIO hardware that does not support open drain mode, but allows sensing of the SDA and SCL lines even when they are being driven. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02Use menuconfig objects - I2CJan Engelhardt4-75/+60
Allow the whole I2C menu to be disabled at once without diving into the submenus for deselecting all options (should the user desire so). Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-05-02i2c: Restore i2c_smbus_read_block_dataJean Delvare2-0/+19
Add back the i2c_smbus_read_block_data helper function, it is needed by the upcoming lm93 hardware monitoring driver and possibly others. Signed-off-by: Jean Delvare <khali@linux-fr.org>
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-08 21:59:29 +0300