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1c23af90dc
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Haavard Skinnemoen 1c23af90dc i2c: Bitbanging I2C bus driver using the GPIO API 
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>
2007-05-01 23:26:34 +02:00
..
acorn
acpi power management: implement pm_ops.valid for everybody 2007-04-30 16:40:40 -07:00
amba uevent: use add_uevent_var() instead of open coding it 2007-04-27 10:57:29 -07:00
ata libata: honour host controllers that want just one host 2007-04-30 17:43:48 -07:00
atm [ATM]: Use mutex instead of binary semaphore in FORE Systems 200E-series driver 2007-04-26 01:41:49 -07:00
auxdisplay
base drivers/base/attribute_container.c: use mutex instead of binary semaphore 2007-04-27 10:57:34 -07:00
block ub: Bind to first endpoint, not to last 2007-04-27 13:28:34 -07:00
bluetooth [SK_BUFF]: Introduce skb_copy_from_linear_data{_offset} 2007-04-25 22:28:23 -07:00
cdrom
char Merge branch 'for-2.6.22' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2007-04-30 08:10:12 -07:00
clocksource ACPI: correct pathname in comment 2007-04-25 14:27:06 -04:00
connector [NETLINK]: Switch cb_lock spinlock to mutex and allow to override it 2007-04-25 22:29:03 -07:00
cpufreq [PATCH] Fix maxcpus=1 trigerring BUG() in cpufreq 2007-03-27 08:55:56 -07:00
crypto
dio
dma
edac
eisa [PATCH] drivers/eisa/pci_eisa.c:pci_eisa_init() should be init 2007-03-27 09:05:15 -07:00
fc4
firmware
hid Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-04-30 08:58:21 -07:00
hwmon Merge branch 'linux-2.6' into for-2.6.22 2007-04-30 12:38:01 +10:00
i2c i2c: Bitbanging I2C bus driver using the GPIO API 2007-05-01 23:26:34 +02:00
ide IDE: remove rwsem use from ide-proc core 2007-04-27 10:57:30 -07:00
ieee1394 ieee1394: remove garbage from Kconfig 2007-04-30 00:00:33 +02:00
infiniband Merge branch 'linux-2.6' into for-2.6.22 2007-04-30 12:38:01 +10:00
input Input: gameport - do not touch bus's rwsem 2007-04-27 10:57:30 -07:00
isdn [SK_BUFF]: Introduce skb_copy_to_linear_data{_offset} 2007-04-25 22:28:29 -07:00
kvm KVM: Fix off-by-one when writing to a nonpae guest pde 2007-04-19 18:39:26 +03:00
leds
macintosh i2c: Make i2c_del_driver a void function 2007-05-01 23:26:32 +02:00
mca
md [BLOCK] Don't pin lots of memory in mempools 2007-04-30 09:08:17 +02:00
media i2c: Cleanup the includes of <linux/i2c.h> 2007-05-01 23:26:29 +02:00
message [SK_BUFF]: Introduce skb_copy_from_linear_data{_offset} 2007-04-25 22:28:23 -07:00
mfd [PATCH] drivers/mfd/sm501.c: fix an off-by-one 2007-04-02 10:06:08 -07:00
misc Pull thinkpad into release branch 2007-04-28 23:11:19 -04:00
mmc uevent: use add_uevent_var() instead of open coding it 2007-04-27 10:57:29 -07:00
mtd [MTD] [MAPS] drivers/mtd/maps/ck804xrom.c: convert pci_module_init() 2007-04-27 23:34:21 +01:00
net Merge master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 2007-04-30 08:14:42 -07:00
nubus
oprofile [PATCH] oprofile: fix potential deadlock on oprofilefs_lock 2007-03-28 13:58:02 -07:00
parisc [NET]: Remove NETIF_F_INTERNAL_STATS, default to internal stats. 2007-04-28 21:04:03 -07:00
parport [PARPORT] SUNBPP: Fix OOPS when debugging is enabled. 2007-04-23 23:33:17 -07:00
pci Merge branch 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev 2007-04-29 10:48:21 -07:00
pcmcia [PATCH] omap_cf: oops-on-suspend fix 2007-04-08 19:47:55 -07:00
pnp PNP: stop using the subsystem rwsem 2007-04-27 10:57:30 -07:00
ps3 [POWERPC] Remove dev_dbg redefinition in drivers/ps3/vuart.c 2007-04-30 13:03:39 +10:00
rapidio
rtc [PATCH] rtc-cmos lockdep fix, irq updates 2007-04-02 10:06:09 -07:00
s390 s390: cio: Delay uevents for subchannels 2007-04-27 10:57:32 -07:00
sbus [OPENPROM]: Use pci_device_to_OF_node(). 2007-04-26 01:54:59 -07:00
scsi Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block 2007-04-30 08:12:39 -07:00
serial Merge branch 'linux-2.6' into for-2.6.22 2007-04-30 12:38:01 +10:00
sh
sn
spi spi: fix use of set_cs in spi_s3c24xx driver 2007-04-17 16:36:27 -07:00
tc [PATCH] Fix build error on zs serial driver 2007-04-04 21:12:47 -07:00
telephony
usb Merge branch 'for-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jikos/hid 2007-04-30 08:58:21 -07:00
video i2c: Shrink struct i2c_client 2007-05-01 23:26:28 +02:00
w1
zorro
Kconfig
Makefile i2c: Add i2c_board_info and i2c_new_device() 2007-05-01 23:26:31 +02:00