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Commit aee62305 authored by Jean Delvare's avatar Jean Delvare Committed by Greg Kroah-Hartman
Browse files

[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: default avatarJean Delvare <khali@linux-fr.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 177d165d

drivers/i2c/busses/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -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

drivers/i2c/chips/Kconfig

+8 −0
Original line number Diff line number Diff line
@@ -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