I'm hitting an issue where I want to register my GPMC connected NAND on CS0 at address 0x0.
Here's the relevant error from the boot messages:-
[ 0.293834] omap-gpmc gpmc.3: GPMC revision 6.0
[ 0.294175] omap-gpmc gpmc.3: failed to reserve memory
[ 0.294267] omap-gpmc: probe of gpmc.3 failed with error -16
The chip select and base address have already been setup under U-Boot and it appears to work fine
(i.e. U-Boot can see the device).
Am I not allowed to place the NAND at address 0x0 ? If not, why not ?
The GPMC section of my .dts file is shown below.
Cheers
Mark J.
---
gpmc: gpmc@50000000 {
compatible = "ti,am3352-gpmc", "simple-bus";
ti,hwmods = "gpmc";
status = "okay";
#address-cells = <2>;
#size-cells = <1>;
ranges = <0 0 0x01000000 0x10000000>; /* CS0: NAND 256M */
nand@0,0 {
reg = <0 0 0x10000000>; /* CS0, offset 0 */
nand-bus-width = <8>;
ti,nand-ecc-opt = "bch8";
gpmc,sync-clk = <0>;
gpmc,cs-on = <0>;
gpmc,cs-rd-off = <44>;
gpmc,cs-wr-off = <44>;
gpmc,adv-on = <6>;
gpmc,adv-rd-off = <34>;
gpmc,adv-wr-off = <44>;
gpmc,we-off = <40>;
gpmc,oe-off = <54>;
gpmc,access = <64>;
gpmc,rd-cycle = <82>;
gpmc,wr-cycle = <82>;
gpmc,wr-access = <40>;
gpmc,wr-data-mux-bus = <0>;
#address-cells = <1>;
#size-cells = <1>;
elm_id = <&elm>;
/* MTD partition table */
partition@1 {
label = "boot";
reg = <0x00000000 0x00100000>; /* 1MB */
};
partition@2 {
label = "rootfs";
reg = <0x00100000 0x04000000>; /* 64MB */
};
partition@3 {
label = "data";
reg = <0x04100000 0x0bf00000>; /* 191MB */
};
};
};
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