[PATCH 1/1] dt: Add general DMA window parser

* Stephen Warren wrote:

On 04/18/2012 04:19 AM, Hiroshi Doyu wrote:

quoted

Subject: [PATCH 1/1] dt: Add general DMA window parser

This code was stolen from:
	"arch/microblaze/kernel/prom_parse.c"
	"arch/powerpc/kernel/prom_parse.c"

Once "ibm," prefix is removed from dts file. This generic one could
replace the originals.

quoted

+extern void of_parse_dma_window(struct device_node *dn,
+		       const void *dma_window_prop, unsigned long *busno,
+			       unsigned long *phys, unsigned long *size);

At least some other of_*() parsing functions take the property name
rather than the property pointer, and also take an index into the
property in order to support multiple entries in it. See for example
of_parse_phandle and of_get_named_gpio_flags. Should this new API be
similar? E.g.:

extern void of_parse_dma_window(struct device_node *np,
			const char *propname, int index,
			unsigned long *busno,
			unsigned long *phys, unsigned long *size);

In that case the function should return int for proper error handling.

Thierry
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