ARM: mvebu: Add support for NOR flash device on Openblocks AX3 board

The Plat'home Openblocks AX3 has a 128 MiB NOR flash device connected
to the Device Bus. This commit adds the device tree node to support this device.

The SoC supports a flexible and dynamic decoding window allocation scheme;
but since this feature is still not implemented we need to specify the window
base address in the device tree node itself.
This base address has been selected in a completely arbitrary fashion.

Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>

diff --git a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
index 3818a82..b5c5f4d 100644 (file)
--- a/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
+++ b/arch/arm/boot/dts/armada-xp-openblocks-ax3-4.dts
@@ -139,5 +139,34 @@
                usb@d0051000 {
                        status = "okay";
                };
+
+               devbus-bootcs@d0010400 {
+                       status = "okay";
+                       ranges = <0 0xf0000000 0x8000000>; /* @addr 0xf000000, size 0x8000000 */
+
+                       /* Device Bus parameters are required */
+
+                       /* Read parameters */
+                       devbus,bus-width    = <8>;
+                       devbus,turn-off-ps  = <60000>;
+                       devbus,badr-skew-ps = <0>;
+                       devbus,acc-first-ps = <124000>;
+                       devbus,acc-next-ps  = <248000>;
+                       devbus,rd-setup-ps  = <0>;
+                       devbus,rd-hold-ps   = <0>;
+
+                       /* Write parameters */
+                       devbus,sync-enable = <0>;
+                       devbus,wr-high-ps  = <60000>;
+                       devbus,wr-low-ps   = <60000>;
+                       devbus,ale-wr-ps   = <60000>;
+
+                       /* NOR 128 MiB */
+                       nor@0 {
+                               compatible = "cfi-flash";
+                               reg = <0 0x8000000>;
+                               bank-width = <2>;
+                       };
+               };
        };
 };