From a7d4f81821f7eec3175f8e23dd6949c71ab2da43 Mon Sep 17 00:00:00 2001 From: Ezequiel Garcia Date: Wed, 10 Apr 2013 16:04:03 -0300 Subject: [PATCH] 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 Acked-by: Arnd Bergmann Signed-off-by: Jason Cooper --- .../boot/dts/armada-xp-openblocks-ax3-4.dts | 29 +++++++++++++++++++ 1 file changed, 29 insertions(+) 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 3818a82176a2..b5c5f4d43688 100644 --- 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>; + }; + }; }; }; -- 2.20.1