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

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The Armada XP Development Board (DB-78460-BP) 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>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Jason Cooper <jason@lakedaemon.net>
This commit is contained in:
Ezequiel Garcia 2013-05-17 08:09:58 -03:00 committed by Jason Cooper
parent ee514b381e
commit b484ff42df
1 changed files with 32 additions and 0 deletions
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32
arch/arm/boot/dts/armada-xp-db.dts
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@ -30,6 +30,9 @@
};
soc {
ranges = <0 0 0xd0000000 0x100000 /* Internal registers 1MiB */
0xf0000000 0 0xf0000000 0x1000000>; /* Device Bus, NOR 16MiB */
internal-regs {
serial@12000 {
clock-frequency = <250000000>;
@ -156,6 +159,35 @@
status = "okay";
};
};
devbus-bootcs@10400 {
status = "okay";
ranges = <0 0xf0000000 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>;
};
};
};
};
};