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David Brownell 907135aaa0 i2c-dev: "how does it work" comments 
This adds some "how does this work" comments to the i2c-dev driver,
plus separators between the three main components:

  - The parallel list of i2c_adapters ("i2c_dev_list"), each of which
    gets a "struct i2c_dev" and a /dev/i2c-X character special file.

  - An i2cdev_driver gets adapter add/remove notifications, which are
    used to maintain that list of adapters.

  - Special file operations, which let userspace talk either directly to
    the adapter (for i2c_msg operations) or through cached addressing info
    using an anonymous i2c_client (never registered anywhere).

Plus there's the usual module load/unload record keeping.

After making sense of this code, I think that the anonymous i2c_client
is pretty shady.  But since it's never registered, using this code with
a system set up for "new style" I2C drivers is no more complicated than
always using the I2C_SLAVE_FORCE ioctl (instead of I2C_SLAVE).

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
2007-11-15 19:24:01 +01:00
..
acorn/char
acpi ACPI: AC: Update AC state on resume 2007-11-14 18:45:44 -08:00
amba
ata libata: Don't fail device revalidation for bad _GTF methods 2007-11-10 00:31:27 -05:00
atm Eliminate pointless casts from void* in a few driver irq handlers. 2007-10-23 19:53:16 -04:00
auxdisplay
base cleanup asm/scatterlist.h includes 2007-11-02 08:47:06 +01:00
block rd: fix data corruption on memory pressure 2007-11-14 18:45:42 -08:00
bluetooth
cdrom SG: audit of drivers that use blk_rq_map_sg() 2007-10-24 13:21:21 +02:00
char Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-11-14 18:51:48 -08:00
clocksource
connector [CONNECTOR]: Fix a spurious kfree_skb() call 2007-10-30 21:29:47 -07:00
cpufreq
cpuidle cpuidle: remove unused exports 2007-10-29 17:27:50 -04:00
crypto [CRYPTO] geode: Fix not inplace encryption 2007-11-11 19:03:48 +08:00
dca
dio
dma I/OAT: Add support for version 2 of ioatdma device 2007-11-14 18:45:41 -08:00
edac i5000_edac: no need to __stringify() KBUILD_BASENAME 2007-11-14 18:45:41 -08:00
eisa
firewire firewire: fw-sbp2: fix refcounting 2007-11-07 01:59:28 +01:00
firmware
hid HID: Don't access input_dev->private directly 2007-10-31 13:30:35 +01:00
hwmon hwmon: (i5k_amb) Convert macros to C functions 2007-11-08 08:42:47 -05:00
i2c i2c-dev: "how does it work" comments 2007-11-15 19:24:01 +01:00
ide ide: remove stale/incorrect comment from setup-pci.c 2007-11-13 22:09:16 +01:00
ieee1394 ieee1394: iso and async streams: s/g list fix 2007-11-04 14:31:16 +01:00
infiniband RDMA/cxgb3: Set the max_qp_init_rd_atom attribute in query_device 2007-11-13 15:27:00 -08:00
input Use i8253.c lock for PC speaker on MIPS, too. 2007-11-02 19:39:18 -07:00
isdn [ISDN] sc: Really, really fix warning 2007-11-14 15:59:43 -08:00
kvm KVM: SVM: Intercept the 'invd' and 'wbinvd' instructions 2007-11-08 12:05:45 +02:00
leds leds: bugfixes for leds-gpio 2007-11-05 21:54:41 +00:00
lguest lguest_user.c: fix memory leak 2007-11-14 18:45:38 -08:00
macintosh [POWERPC] windfarm: Fix windfarm thread freezer interaction 2007-11-08 14:15:34 +11:00
mca
md raid5: fix unending write sequence 2007-11-14 18:45:39 -08:00
media V4L/DVB (6548): pvrusb2: Fix oops on module removal 2007-11-04 21:41:30 -02:00
message i2o: debug messages corrected 2007-11-05 15:12:31 -08:00
mfd
misc drivers/misc: Move misplaced pci_dev_put's 2007-11-14 18:45:39 -08:00
mmc Add missing "\n" to log message 2007-11-10 11:59:49 +01:00
mtd Eliminate pointless casts from void* in a few driver irq handlers. 2007-10-23 19:53:16 -04:00
net Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband 2007-11-14 18:53:49 -08:00
nubus
of
oprofile oProfile: oops when profile_pc() returns ~0LU 2007-11-14 18:45:37 -08:00
parisc parisc: fix sg_page() fallout 2007-10-23 09:49:31 +02:00
parport [PARPORT] Remove unused 'irq' argument from parport irq functions 2007-10-23 19:53:16 -04:00
pci PCI: Add Kconfig option to disable deprecated pci_find_* API 2007-11-05 13:35:17 -08:00
pcmcia
pnp
power Merge git://git.infradead.org/battery-2.6 2007-10-22 19:20:52 -07:00
ps3
rapidio
rtc rtc-ds1307 exports NVRAM 2007-11-14 18:45:36 -08:00
s390 [S390] Fix priority mistakes in drivers/s390/cio/cmf.c 2007-11-05 11:10:17 +01:00
sbus
scsi aic94xx_sds: rename FLASH_SIZE 2007-11-14 18:45:44 -08:00
serial CRISv10 serial driver rewrite 2007-11-14 18:45:46 -08:00
sh superhyway: Handle device_register() retval properly. 2007-11-07 11:13:55 +09:00
sn
spi tle62x0 driver stops ignoring read errors 2007-11-14 18:45:42 -08:00
ssb ssb: Fix PCMCIA-host lowlevel bus access 2007-11-10 22:01:53 -08:00
tc
telephony telephony: phonedev panics if unregistering device not registered [Bug 9266] 2007-11-05 15:12:33 -08:00
uio
usb keyspan: init termios properly 2007-11-14 18:45:44 -08:00
video gbefb: fix section mismatch warnings 2007-11-14 18:45:42 -08:00
virtio virtio: Force use of power-of-two for descriptor ring sizes 2007-11-12 13:59:40 +11:00
w1 W1: fix memset size error 2007-11-14 18:45:36 -08:00
watchdog Merge git://git.kernel.org/pub/scm/linux/kernel/git/wim/linux-2.6-watchdog 2007-11-02 19:36:26 -07:00
xen
zorro
Kconfig Virtio interface 2007-10-23 15:49:54 +10:00
Makefile Merge master.kernel.org:/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6 2007-10-23 16:37:29 -07:00