This API helps to map physical register addresss pace of device to virtual address space easily. Its just a wrapper around map_physmem() with MAP_NOCACHE flag.
Signed-off-by: Vignesh R vigneshr@ti.com Suggested-by: Simon Glass sjg@chromium.org ---
v3: Explicitly include header file
v2: New patch
drivers/core/device.c | 6 ++++++ include/dm/device.h | 9 +++++++++ 2 files changed, 15 insertions(+)
diff --git a/drivers/core/device.c b/drivers/core/device.c index 1322991d6c7b..6b19b4b8c7a0 100644 --- a/drivers/core/device.c +++ b/drivers/core/device.c @@ -10,6 +10,7 @@ */
#include <common.h> +#include <asm/io.h> #include <fdtdec.h> #include <fdt_support.h> #include <malloc.h> @@ -678,6 +679,11 @@ void *dev_get_addr_ptr(struct udevice *dev) return (void *)(uintptr_t)dev_get_addr_index(dev, 0); }
+void *dev_map_physmem(struct udevice *dev, unsigned long size) +{ + return map_physmem(dev_get_addr(dev), size, MAP_NOCACHE); +} + bool device_has_children(struct udevice *dev) { return !list_empty(&dev->child_head); diff --git a/include/dm/device.h b/include/dm/device.h index 8970fc015c7e..5253b5410d9a 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -463,6 +463,15 @@ fdt_addr_t dev_get_addr(struct udevice *dev); */ void *dev_get_addr_ptr(struct udevice *dev);
+/* * dev_map_physmem() - Map bus memory into CPU space + * + * @dev: Pointer to device + * @size: size of the memory to map + * + * @return addr + */ +void *dev_map_physmem(struct udevice *dev, unsigned long size); + /** * dev_get_addr_index() - Get the indexed reg property of a device *