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mtd: physmap_of: Loop through all "reg" tuples for mapping

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This patch changes the loop over the "reg" tuples to not exit
directly upon of_address_to_resource() failure but to continue
with the next "reg" tuple instead. This failure could be due to
size = 0, which might be passed via the device-tree.

This is needed for boards, where a "reg" tuple might have size 0
(of_address_to_resource() returns with EINVAL when size = 0).

Example:

Fully equipped board:

	reg = <0 0x00000000 0x00400000
	       0 0x00400000 0x00400000>;

Partially equipped board:

	reg = <0 0x00000000 0x00400000
	       0 0x00400000 0x00000000>;

This could be the case on boards with runtime detection of
multiple NOR flash configurations where the detected flash size
is inserted into the dtb in U-Boot.

Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
Stefan Roese 2010-10-08 14:41:27 +02:00 • committed by David Woodhouse
parent 41bdc602ec
commit 940fe282ae
1 changed files with 5 additions and 3 deletions
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8
drivers/mtd/maps/physmap_of.c
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@ -267,9 +267,11 @@ static int __devinit of_flash_probe(struct platform_device *dev,
for (i = 0; i < count; i++) { for (i = 0; i < count; i++) {
err = -ENXIO; err = -ENXIO;
if (of_address_to_resource(dp, i, &res)) { if (of_address_to_resource(dp, i, &res)) {
dev_err(&dev->dev, "Can't get IO address from device" /*
" tree\n"); * Continue with next register tuple if this
goto err_out; * one is not mappable
*/
continue;
} }
dev_dbg(&dev->dev, "of_flash device: %.8llx-%.8llx\n", dev_dbg(&dev->dev, "of_flash device: %.8llx-%.8llx\n",