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| author | Vignesh R <vigneshr@ti.com> | 2016-07-06 09:58:55 +0530 |
|---|---|---|
| committer | Jagan Teki <jteki@openedev.com> | 2016-07-09 20:16:08 +0530 |
| commit | 7c616862553e37c89ea5db399961018a7367ca33 (patch) | |
| tree | 9a1a71c35a2e8abc20d882fd0b6358140f32bb2a | |
| parent | c8864d720926c6b136aa9aa97fd1d4410250d271 (diff) | |
| download | u-boot-imx-7c616862553e37c89ea5db399961018a7367ca33.zip u-boot-imx-7c616862553e37c89ea5db399961018a7367ca33.tar.gz u-boot-imx-7c616862553e37c89ea5db399961018a7367ca33.tar.bz2 | |
dm: core: implement dev_map_physmem()
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>
Reviewed-by: Jagan Teki <jteki@openedev.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Jagan Teki <jteki@openedev.com>
| -rw-r--r-- | drivers/core/device.c | 11 | ||||
| -rw-r--r-- | include/dm/device.h | 13 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/core/device.c b/drivers/core/device.c index eb75b17..f7fb0cc 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> @@ -697,6 +698,16 @@ 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) +{ + fdt_addr_t addr = dev_get_addr(dev); + + if (addr == FDT_ADDR_T_NONE) + return NULL; + + return map_physmem(addr, 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 f03bcd3..1bfcf3b 100644 --- a/include/dm/device.h +++ b/include/dm/device.h @@ -467,6 +467,19 @@ fdt_addr_t dev_get_addr(struct udevice *dev); void *dev_get_addr_ptr(struct udevice *dev); /** + * dev_map_physmem() - Read device address from reg property of the + * device node and map the address into CPU address + * space. + * + * @dev: Pointer to device + * @size: size of the memory to map + * + * @return mapped address, or NULL if the device does not have reg + * property. + */ +void *dev_map_physmem(struct udevice *dev, unsigned long size); + +/** * dev_get_addr_index() - Get the indexed reg property of a device * * @dev: Pointer to a device |