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authorJean Delvare <khali@linux-fr.org>2006-06-04 19:59:57 +0200
committerGreg Kroah-Hartman <gregkh@suse.de>2006-06-22 11:10:33 -0700
commitaee62305345863430a937af289b9bd080a100dac (patch)
tree7e145ccf7052fd298ed94b75e7f9e85a64999a53 /drivers/i2c
parent177d165d7c2ec424007d6241a93d0cb83d953c51 (diff)
downloadop-kernel-dev-aee62305345863430a937af289b9bd080a100dac.zip
op-kernel-dev-aee62305345863430a937af289b9bd080a100dac.tar.gz
[PATCH] i2c: Suggest N for rare devices in Kconfig
Improve the Kconfig help text of the follwing i2c drivers: * busses/i2c-pca-isa.c * chips/pcf8574.c * chips/pcf8591.c These are hard to detect and building them into the kernel results in long delays at boot. March 2006, thread "I2C_PCA_ISA causes boot delays" http://marc.theaimsgroup.com/?l=linux-kernel&m=114360399415744&w=2 April 2006, thread "i2c-related 1-minute hang during bootup" http://marc.theaimsgroup.com/?l=linux-kernel&m=114640992330721&w=2 Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/i2c')
-rw-r--r--drivers/i2c/busses/Kconfig6
-rw-r--r--drivers/i2c/chips/Kconfig8
2 files changed, 14 insertions, 0 deletions
diff --git a/drivers/i2c/busses/Kconfig b/drivers/i2c/busses/Kconfig
index e3450d1..d25a8cb 100644
--- a/drivers/i2c/busses/Kconfig
+++ b/drivers/i2c/busses/Kconfig
@@ -503,6 +503,7 @@ config I2C_PCA_ISA
tristate "PCA9564 on an ISA bus"
depends on I2C
select I2C_ALGOPCA
+ default n
help
This driver supports ISA boards using the Philips PCA 9564
Parallel bus to I2C bus controller
@@ -510,6 +511,11 @@ config I2C_PCA_ISA
This driver can also be built as a module. If so, the module
will be called i2c-pca-isa.
+ This device is almost undetectable and using this driver on a
+ system which doesn't have this device will result in long
+ delays when I2C/SMBus chip drivers are loaded (e.g. at boot
+ time). If unsure, say N.
+
config I2C_MV64XXX
tristate "Marvell mv64xxx I2C Controller"
depends on I2C && MV64X60 && EXPERIMENTAL
diff --git a/drivers/i2c/chips/Kconfig b/drivers/i2c/chips/Kconfig
index 7aa5c38..87ee3ce 100644
--- a/drivers/i2c/chips/Kconfig
+++ b/drivers/i2c/chips/Kconfig
@@ -39,6 +39,7 @@ config SENSORS_EEPROM
config SENSORS_PCF8574
tristate "Philips PCF8574 and PCF8574A"
depends on I2C && EXPERIMENTAL
+ default n
help
If you say yes here you get support for Philips PCF8574 and
PCF8574A chips.
@@ -46,6 +47,9 @@ config SENSORS_PCF8574
This driver can also be built as a module. If so, the module
will be called pcf8574.
+ These devices are hard to detect and rarely found on mainstream
+ hardware. If unsure, say N.
+
config SENSORS_PCA9539
tristate "Philips PCA9539 16-bit I/O port"
depends on I2C && EXPERIMENTAL
@@ -59,12 +63,16 @@ config SENSORS_PCA9539
config SENSORS_PCF8591
tristate "Philips PCF8591"
depends on I2C && EXPERIMENTAL
+ default n
help
If you say yes here you get support for Philips PCF8591 chips.
This driver can also be built as a module. If so, the module
will be called pcf8591.
+ These devices are hard to detect and rarely found on mainstream
+ hardware. If unsure, say N.
+
config ISP1301_OMAP
tristate "Philips ISP1301 with OMAP OTG"
depends on I2C && ARCH_OMAP_OTG
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