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ARM: dts: ixp4xx: Create a proper expansion bus

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The IXP4xx expansion bus is 24 bits (256 MB) that is memory
mapped between 0x50000000-0x5fffffff usin a set of chip
selects. The size of the windows is 16 or 32MB defined by
the boot loader system configuration at runtime.

Create a rudimentary simple-bus and move the flash memories
to the expansion bus, inside the SoC.

Cc: Zoltan HERPAI <wigyori@uid0.hu>
Cc: Raylynn Knight <rayknight@me.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
This commit is contained in:
Linus Walleij 2021-05-11 09:44:58 +02:00
parent 152b7a5996
commit 3babb604a8
3 changed files with 50 additions and 33 deletions
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36
arch/arm/boot/dts/intel-ixp42x-linksys-nslu2.dts
View File

@ -90,24 +90,26 @@ gpio-poweroff {
timeout-ms = <5000>;
};
/* The first 16MB region on the expansion bus */
flash@50000000 {
compatible = "intel,ixp4xx-flash", "cfi-flash";
bank-width = <2>;
/*
* 8 MB of Flash in 0x20000 byte blocks
* mapped in at 0x50000000
*/
reg = <0x50000000 0x800000>;
partitions {
compatible = "redboot-fis";
/* Eraseblock at 0x7e0000 */
fis-index-block = <0x3f>;
};
};
soc {
bus@50000000 {
/* The first 16MB region at CS0 on the expansion bus */
flash@0 {
compatible = "intel,ixp4xx-flash", "cfi-flash";
bank-width = <2>;
/*
* 8 MB of Flash in 0x20000 byte blocks
* mapped in at CS0.
*/
reg = <0x00000000 0x800000>;
partitions {
compatible = "redboot-fis";
/* Eraseblock at 0x7e0000 */
fis-index-block = <0x3f>;
};
};
};
pci@c0000000 {
status = "ok";

34
arch/arm/boot/dts/intel-ixp43x-gateworks-gw2358.dts
View File

@ -76,23 +76,25 @@ pld1: pld@57 {
};
};
flash@50000000 {
compatible = "intel,ixp4xx-flash", "cfi-flash";
bank-width = <2>;
/*
* 32 MB of Flash in 0x20000 byte blocks
* mapped in at 0x50000000
*/
reg = <0x50000000 0x2000000>;
partitions {
compatible = "redboot-fis";
/* Eraseblock at 0x1fe0000 */
fis-index-block = <0xff>;
};
};
soc {
bus@50000000 {
flash@0 {
compatible = "intel,ixp4xx-flash", "cfi-flash";
bank-width = <2>;
/*
* 32 MB of Flash in 0x20000 byte blocks
* mapped in at CS0.
*/
reg = <0x00000000 0x2000000>;
partitions {
compatible = "redboot-fis";
/* Eraseblock at 0x1fe0000 */
fis-index-block = <0xff>;
};
};
};
pci@c0000000 {
status = "ok";

13
arch/arm/boot/dts/intel-ixp4xx.dtsi
View File

@ -14,6 +14,19 @@ soc {
compatible = "simple-bus";
interrupt-parent = <&intcon>;
/*
* The IXP4xx expansion bus is a set of 16 or 32MB
* windows in the 256MB space from 0x50000000 to
* 0x5fffffff.
*/
bus@50000000 {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x00000000 0x50000000 0x10000000>;
dma-ranges = <0x00000000 0x50000000 0x10000000>;
};
qmgr: queue-manager@60000000 {
compatible = "intel,ixp4xx-ahb-queue-manager";
reg = <0x60000000 0x4000>;