Content-Disposition: inline; filename=i2c-Kconfig-suggest-N-for-rare-devices.patch 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 at linux-fr.org> --- drivers/i2c/busses/Kconfig | 6 ++++++ drivers/i2c/chips/Kconfig | 8 ++++++++ 2 files changed, 14 insertions(+) --- linux-2.6.17-rc5.orig/drivers/i2c/busses/Kconfig 2006-06-04 09:50:19.000000000 +0200 +++ linux-2.6.17-rc5/drivers/i2c/busses/Kconfig 2006-06-04 09:54:00.000000000 +0200 @@ -503,6 +503,7 @@ 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 @@ 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 --- linux-2.6.17-rc5.orig/drivers/i2c/chips/Kconfig 2006-06-04 09:50:19.000000000 +0200 +++ linux-2.6.17-rc5/drivers/i2c/chips/Kconfig 2006-06-04 09:51:38.000000000 +0200 @@ -39,6 +39,7 @@ 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 @@ 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_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 -- Jean Delvare
