mmc: tmio-mmc: define device-tree bindings
authorGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Fri, 15 Feb 2013 15:13:55 +0000 (16:13 +0100)
committerChris Ball <cjb@laptop.org>
Sun, 24 Feb 2013 19:37:21 +0000 (14:37 -0500)
Define device-tree bindings for the tmio-mmc driver to be able to specify
parameters, currently provided in platform data.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Chris Ball <cjb@laptop.org>
Documentation/devicetree/bindings/mmc/tmio_mmc.txt [new file with mode: 0644]

diff --git a/Documentation/devicetree/bindings/mmc/tmio_mmc.txt b/Documentation/devicetree/bindings/mmc/tmio_mmc.txt
new file mode 100644 (file)
index 0000000..df204e1
--- /dev/null
@@ -0,0 +1,20 @@
+* Toshiba Mobile IO SD/MMC controller
+
+The tmio-mmc driver doesn't probe its devices actively, instead its binding to
+devices is managed by either MFD drivers or by the sh_mobile_sdhi platform
+driver. Those drivers supply the tmio-mmc driver with platform data, that either
+describe hardware capabilities, known to them, or are obtained by them from
+their own platform data or from their DT information. In the latter case all
+compulsory and any optional properties, common to all SD/MMC drivers, as
+described in mmc.txt, can be used. Additionally the following tmio_mmc-specific
+optional bindings can be used.
+
+Optional properties:
+- toshiba,mmc-wrprotect-disable: write-protect detection is unavailable
+
+When used with Renesas SDHI hardware, the following compatibility strings
+configure various model-specific properties:
+
+"renesas,sh7372-sdhi": (default) compatible with SH7372
+"renesas,r8a7740-sdhi":        compatible with R8A7740: certain MMC/SD commands have to
+                       wait for the interface to become idle.