diff options
Diffstat (limited to 'drivers/base/Kconfig')
| -rw-r--r-- | drivers/base/Kconfig | 66 |
1 files changed, 36 insertions, 30 deletions
diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig index d57e8d0fb82..21cf46f4524 100644 --- a/drivers/base/Kconfig +++ b/drivers/base/Kconfig @@ -16,6 +16,11 @@ config UEVENT_HELPER_PATH that it creates a high system load, or on smaller systems it is known to create out-of-memory situations during bootup. + To disable user space helper program execution at early boot + time specify an empty string here. This setting can be altered + via /proc/sys/kernel/hotplug or via /sys/kernel/uevent_helper + later at runtime. + config DEVTMPFS bool "Maintain a devtmpfs filesystem to mount at /dev" depends on HOTPLUG @@ -65,17 +70,17 @@ config PREVENT_FIRMWARE_BUILD default y help Say yes to avoid building firmware. Firmware is usually shipped - with the driver, and only when updating the firmware a rebuild - should be made. - If unsure say Y here. + with the driver and only when updating the firmware should a + rebuild be made. + If unsure, say Y here. config FW_LOADER tristate "Userspace firmware loading support" if EXPERT default y ---help--- - This option is provided for the case where no in-kernel-tree modules - require userspace firmware loading support, but a module built outside - the kernel tree does. + This option is provided for the case where none of the in-tree modules + require userspace firmware loading support, but a module built + out-of-tree does. config FIRMWARE_IN_KERNEL bool "Include in-kernel firmware blobs in kernel binary" @@ -83,22 +88,22 @@ config FIRMWARE_IN_KERNEL default y help The kernel source tree includes a number of firmware 'blobs' - which are used by various drivers. The recommended way to - use these is to run "make firmware_install" and to copy the - resulting binary files created in usr/lib/firmware directory - of the kernel tree to the /lib/firmware on your system so + that are used by various drivers. The recommended way to + use these is to run "make firmware_install", which, after + converting ihex files to binary, copies all of the needed + binary files in firmware/ to /lib/firmware/ on your system so that they can be loaded by userspace helpers on request. Enabling this option will build each required firmware blob into the kernel directly, where request_firmware() will find them without having to call out to userspace. This may be - useful if your root file system requires a device which uses - such firmware, and do not wish to use an initrd. + useful if your root file system requires a device that uses + such firmware and do not wish to use an initrd. This single option controls the inclusion of firmware for - every driver which uses request_firmware() and ships its - firmware in the kernel source tree, to avoid a proliferation - of 'Include firmware for xxx device' options. + every driver that uses request_firmware() and ships its + firmware in the kernel source tree, which avoids a + proliferation of 'Include firmware for xxx device' options. Say 'N' and let firmware be loaded from userspace. @@ -106,27 +111,27 @@ config EXTRA_FIRMWARE string "External firmware blobs to build into the kernel binary" depends on FW_LOADER help - This option allows firmware to be built into the kernel, for the - cases where the user either cannot or doesn't want to provide it from + This option allows firmware to be built into the kernel for the case + where the user either cannot or doesn't want to provide it from userspace at runtime (for example, when the firmware in question is required for accessing the boot device, and the user doesn't want to use an initrd). - This option is a string, and takes the (space-separated) names of the - firmware files -- the same names which appear in MODULE_FIRMWARE() + This option is a string and takes the (space-separated) names of the + firmware files -- the same names that appear in MODULE_FIRMWARE() and request_firmware() in the source. These files should exist under the directory specified by the EXTRA_FIRMWARE_DIR option, which is - by default the firmware/ subdirectory of the kernel source tree. + by default the firmware subdirectory of the kernel source tree. - So, for example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin", - copy the usb8388.bin file into the firmware/ directory, and build the - kernel. Then any request_firmware("usb8388.bin") will be - satisfied internally without needing to call out to userspace. + For example, you might set CONFIG_EXTRA_FIRMWARE="usb8388.bin", copy + the usb8388.bin file into the firmware directory, and build the kernel. + Then any request_firmware("usb8388.bin") will be satisfied internally + without needing to call out to userspace. WARNING: If you include additional firmware files into your binary - kernel image which are not available under the terms of the GPL, + kernel image that are not available under the terms of the GPL, then it may be a violation of the GPL to distribute the resulting - image -- since it combines both GPL and non-GPL work. You should + image since it combines both GPL and non-GPL work. You should consult a lawyer of your own before distributing such an image. config EXTRA_FIRMWARE_DIR @@ -136,10 +141,9 @@ config EXTRA_FIRMWARE_DIR help This option controls the directory in which the kernel build system looks for the firmware files listed in the EXTRA_FIRMWARE option. - The default is the firmware/ directory in the kernel source tree, - but by changing this option you can point it elsewhere, such as - the /lib/firmware/ directory or another separate directory - containing firmware files. + The default is firmware/ in the kernel source tree, but by changing + this option you can point it elsewhere, such as /lib/firmware/ or + some other directory containing the firmware files. config DEBUG_DRIVER bool "Driver Core verbose debug messages" @@ -168,4 +172,6 @@ config SYS_HYPERVISOR bool default n +source "drivers/base/regmap/Kconfig" + endmenu |