ARM: amba: provide common initializers for static amba devices

Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

diff --git a/include/linux/amba/bus.h b/include/linux/amba/bus.h
index e1929620e5a85e3fc479c9098dc84e99db5f7748..a9fab831caf8fd8c3432c4805fd34ea9156daaa8 100644 (file)
--- a/include/linux/amba/bus.h
+++ b/include/linux/amba/bus.h
@@ -92,4 +92,37 @@ void amba_release_regions(struct amba_device *);
 #define amba_manf(d)   AMBA_MANF_BITS((d)->periphid)
 #define amba_part(d)   AMBA_PART_BITS((d)->periphid)
 
+#define __AMBA_DEV(busid, data, mask)                          \
+       {                                                       \
+               .coherent_dma_mask = mask,                      \
+               .init_name = busid,                             \
+               .platform_data = data,                          \
+       }
+
+/*
+ * APB devices do not themselves have the ability to address memory,
+ * so DMA masks should be zero (much like USB peripheral devices.)
+ * The DMA controller DMA masks should be used instead (much like
+ * USB host controllers in conventional PCs.)
+ */
+#define AMBA_APB_DEVICE(name, busid, id, base, irqs, data)     \
+struct amba_device name##_device = {                           \
+       .dev = __AMBA_DEV(busid, data, 0),                      \
+       .res = DEFINE_RES_MEM(base, SZ_4K),                     \
+       .irq = irqs,                                            \
+       .periphid = id,                                         \
+}
+
+/*
+ * AHB devices are DMA capable, so set their DMA masks
+ */
+#define AMBA_AHB_DEVICE(name, busid, id, base, irqs, data)     \
+struct amba_device name##_device = {                           \
+       .dev = __AMBA_DEV(busid, data, ~0ULL),                  \
+       .res = DEFINE_RES_MEM(base, SZ_4K),                     \
+       .dma_mask = ~0ULL,                                      \
+       .irq = irqs,                                            \
+       .periphid = id,                                         \
+}
+
 #endif