drivers/base: add bus for System-on-Chip devices

[pandora-kernel.git] / drivers / base / Kconfig

diff --git a/drivers/base/Kconfig b/drivers/base/Kconfig
index 21cf46f..305e831 100644 (file)
--- a/drivers/base/Kconfig
+++ b/drivers/base/Kconfig
@@ -172,6 +172,98 @@ config SYS_HYPERVISOR
        bool
        default n
 
+config SOC_BUS
+       bool
+
 source "drivers/base/regmap/Kconfig"
 
+config CMA
+       bool "Contiguous Memory Allocator (EXPERIMENTAL)"
+       depends on HAVE_DMA_CONTIGUOUS && HAVE_MEMBLOCK && EXPERIMENTAL
+       select MIGRATION
+       help
+         This enables the Contiguous Memory Allocator which allows drivers
+         to allocate big physically-contiguous blocks of memory for use with
+         hardware components that do not support I/O map nor scatter-gather.
+
+         For more information see <include/linux/dma-contiguous.h>.
+         If unsure, say "n".
+
+if CMA
+
+config CMA_DEBUG
+       bool "CMA debug messages (DEVELOPMENT)"
+       depends on DEBUG_KERNEL
+       help
+         Turns on debug messages in CMA.  This produces KERN_DEBUG
+         messages for every CMA call as well as various messages while
+         processing calls such as dma_alloc_from_contiguous().
+         This option does not affect warning and error messages.
+
+comment "Default contiguous memory area size:"
+
+config CMA_SIZE_MBYTES
+       int "Size in Mega Bytes"
+       depends on !CMA_SIZE_SEL_PERCENTAGE
+       default 16
+       help
+         Defines the size (in MiB) of the default memory area for Contiguous
+         Memory Allocator.
+
+config CMA_SIZE_PERCENTAGE
+       int "Percentage of total memory"
+       depends on !CMA_SIZE_SEL_MBYTES
+       default 10
+       help
+         Defines the size of the default memory area for Contiguous Memory
+         Allocator as a percentage of the total memory in the system.
+
+choice
+       prompt "Selected region size"
+       default CMA_SIZE_SEL_ABSOLUTE
+
+config CMA_SIZE_SEL_MBYTES
+       bool "Use mega bytes value only"
+
+config CMA_SIZE_SEL_PERCENTAGE
+       bool "Use percentage value only"
+
+config CMA_SIZE_SEL_MIN
+       bool "Use lower value (minimum)"
+
+config CMA_SIZE_SEL_MAX
+       bool "Use higher value (maximum)"
+
+endchoice
+
+config CMA_ALIGNMENT
+       int "Maximum PAGE_SIZE order of alignment for contiguous buffers"
+       range 4 9
+       default 8
+       help
+         DMA mapping framework by default aligns all buffers to the smallest
+         PAGE_SIZE order which is greater than or equal to the requested buffer
+         size. This works well for buffers up to a few hundreds kilobytes, but
+         for larger buffers it just a memory waste. With this parameter you can
+         specify the maximum PAGE_SIZE order for contiguous buffers. Larger
+         buffers will be aligned only to this specified order. The order is
+         expressed as a power of two multiplied by the PAGE_SIZE.
+
+         For example, if your system defaults to 4KiB pages, the order value
+         of 8 means that the buffers will be aligned up to 1MiB only.
+
+         If unsure, leave the default value "8".
+
+config CMA_AREAS
+       int "Maximum count of the CMA device-private areas"
+       default 7
+       help
+         CMA allows to create CMA areas for particular devices. This parameter
+         sets the maximum number of such device private CMA areas in the
+         system.
+
+         If unsure, leave the default value "7".
+
+endif
+
 endmenu