diff options
| author | Albert Herranz <albert_herranz@yahoo.es> | 2009-12-18 02:27:20 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-12-18 02:45:31 +0300 |
| commit | 7657c3a7d4bd42b832af5d6bb0e0e9bdba82d44d (patch) | |
| tree | fed3143974d72415771484f9bdcf544415ab3bcd /drivers/mmc/host/Kconfig | |
| parent | bc1ad567b16031a82b90e4ef86c1e7541957781f (diff) | |
| download | linux-7657c3a7d4bd42b832af5d6bb0e0e9bdba82d44d.tar.xz | |
sdhci-of: reorganize driver to support additional hardware
This patch breaks down sdhci-of into a core portion and a eSDHC portion,
clearing the path to easily support additional hardware using the same OF
driver.
Signed-off-by: Albert Herranz <albert_herranz@yahoo.es>
Cc: <linux-mmc@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/mmc/host/Kconfig')
| -rw-r--r-- | drivers/mmc/host/Kconfig | 26 |
1 files changed, 23 insertions, 3 deletions
diff --git a/drivers/mmc/host/Kconfig b/drivers/mmc/host/Kconfig index 9d405b181781..d9234648199a 100644 --- a/drivers/mmc/host/Kconfig +++ b/drivers/mmc/host/Kconfig @@ -44,6 +44,19 @@ config MMC_SDHCI_IO_ACCESSORS This is silent Kconfig symbol that is selected by the drivers that need to overwrite SDHCI IO memory accessors. +config MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER + bool + select MMC_SDHCI_IO_ACCESSORS + help + This option is selected by drivers running on big endian hosts + and performing I/O to a SDHCI controller through a bus that + implements a hardware byte swapper using a 32-bit datum. + This endian mapping mode is called "data invariance" and + has the effect of scrambling the addresses and formats of data + accessed in sizes other than the datum size. + + This is the case for the Freescale eSDHC. + config MMC_SDHCI_PCI tristate "SDHCI support on PCI bus" depends on MMC_SDHCI && PCI @@ -75,11 +88,18 @@ config MMC_RICOH_MMC config MMC_SDHCI_OF tristate "SDHCI support on OpenFirmware platforms" depends on MMC_SDHCI && PPC_OF - select MMC_SDHCI_IO_ACCESSORS help This selects the OF support for Secure Digital Host Controller - Interfaces. So far, only the Freescale eSDHC controller is known - to exist on OF platforms. + Interfaces. + + If unsure, say N. + +config MMC_SDHCI_OF_ESDHC + bool "SDHCI OF support for the Freescale eSDHC controller" + depends on MMC_SDHCI_OF + select MMC_SDHCI_BIG_ENDIAN_32BIT_BYTE_SWAPPER + help + This selects the Freescale eSDHC controller support. If unsure, say N. |