memory: davinci: add support for da8xx DDR2/mDDR controller

Create a new driver for the da8xx DDR2/mDDR controller and implement
support for writing to the Peripheral Bus Burst Priority Register.

Reviewed-by: Kevin Hilman <khilman@baylibre.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
[nsekhar@ti.com: subject line adjustment]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/Documentation/devicetree/bindings/memory-controllers/ti-da8xx-ddrctl.txt b/Documentation/devicetree/bindings/memory-controllers/ti-da8xx-ddrctl.txt
new file mode 100644
index 000000000000..ec1dd408d573
--- /dev/null
+++ b/Documentation/devicetree/bindings/memory-controllers/ti-da8xx-ddrctl.txt
@@ -0,0 +1,20 @@
+* Device tree bindings for Texas Instruments da8xx DDR2/mDDR memory controller
+
+The DDR2/mDDR memory controller present on Texas Instruments da8xx SoCs features
+a set of registers which allow to tweak the controller's behavior.
+
+Documentation:
+OMAP-L138 (DA850) - http://www.ti.com/lit/ug/spruh82c/spruh82c.pdf
+
+Required properties:
+
+- compatible:		"ti,da850-ddr-controller" - for da850 SoC based boards
+- reg:			a tuple containing the base address of the memory
+			controller and the size of the memory area to map
+
+Example for da850 shown below.
+
+ddrctl {
+	compatible = "ti,da850-ddr-controller";
+	reg = <0xb0000000 0xe8>;
+};