mmc: mvsdio: implement a Device Tree binding

This patch adds a simple Device Tree binding for the mvsdio driver, as
well as the necessary documentation for it. Compatibility with non-DT
platforms is preserved, by keeping the platform_data based
initialization.

We introduce a small difference between non-DT and DT platforms: DT
platforms are required to provide a clocks = <...> property, which the
driver uses to get the frequency of the clock that goes to the SDIO
IP. The behaviour on non-DT platforms is kept unchanged: a clock
reference is not mandatory, but the clock frequency must be passed in
the "clock" field of the mvsdio_platform_data structure.

Signed-off-by: Thomas Petazzoni <[email protected]>
Signed-off-by: Andrew Lunn <[email protected]>
Tested-by: Stefan Peter <[email protected]>
Tested-by: Florian Fainelli <[email protected]>
Signed-off-by: Jason Cooper <[email protected]>
Signed-off-by: Chris Ball <[email protected]>

0 files changed, 0 insertions, 0 deletions