* Hiroshi Doyu wrote: > diff --git a/drivers/of/of_dma.c b/drivers/of/of_dma.c > new file mode 100644 > index 0000000..1db1ccd > --- /dev/null > +++ b/drivers/of/of_dma.c > @@ -0,0 +1,35 @@ > +/* > + * Stealed from:
"Stolen from" > + * "arch/microblaze/kernel/prom_parse.c" > + * "arch/powerpc/kernel/prom_parse.c" > + */ > + > +#include <linux/of_address.h> > + > +void of_parse_dma_window(struct device_node *dn, const void *dma_window_prop, > + unsigned long *busno, unsigned long *phys, unsigned long *size) > +{ > + const u32 *dma_window; Should be __be32. > + u32 cells; > + const unsigned char *prop; > + > + dma_window = dma_window_prop; > + > + /* busno is always one cell */ > + if (busno) > + *busno = *(dma_window++); This needs endianness conversion: *busno = be32_to_cpup(dma_window++); > + > + prop = of_get_property(dn, "#dma-address-cells", NULL); > + if (!prop) > + prop = of_get_property(dn, "#address-cells", NULL); > + > + cells = prop ? *(u32 *)prop : of_n_addr_cells(dn); Same here. > + *phys = of_read_number(dma_window, cells); > + > + dma_window += cells; > + > + prop = of_get_property(dn, "#dma-size-cells", NULL); > + cells = prop ? *(u32 *)prop : of_n_size_cells(dn); And here. Thierry
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