ARM: mvebu: Add support for NOR flash device on Armada XP-GP board

The Armada XP Development Board DB-MV784MP-GP has a NOR flash device
connected to the Device Bus. This commit adds the device tree node
to support this device.

This 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>

1 files changed, 29 insertions, 0 deletions

diff --git a/arch/arm/boot/dts/armada-xp-gp.dts b/arch/arm/boot/dts/armada-xp-gp.dts
index 1c8afe2ffebc..e57e9c72eb66 100644
--- a/arch/arm/boot/dts/armada-xp-gp.dts
+++ b/arch/arm/boot/dts/armada-xp-gp.dts
@@ -109,5 +109,34 @@
                                 spi-max-frequency = <108000000>;
                         };
                 };
+
+                devbus-bootcs@d0010400 {
+                        status = "okay";
+                        ranges = <0 0xf0000000 0x1000000>; /* @addr 0xf000000, size 0x1000000 */
+
+                        /* 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 16 MiB */
+                        nor@0 {
+                                compatible = "cfi-flash";
+                                reg = <0 0x1000000>;
+                                bank-width = <2>;
+                        };
+                };
         };
 };