diff options
| author | Simon Glass <sjg@chromium.org> | 2017-06-12 06:21:29 -0600 |
|---|---|---|
| committer | Simon Glass <sjg@chromium.org> | 2017-07-11 10:08:20 -0600 |
| commit | a44810123f9ef069587beacdce7d6f488cf42973 (patch) | |
| tree | 1eb3689993eba842e0663321193653d75dfa01d3 /drivers | |
| parent | 8c293d6ac9c9f698a2b5db8def9d1cef725b5011 (diff) | |
dm: core: Add dev_read_resource() to read device resources
Add a function which reads resources from a device, such as the device
hardware address. This uses the "reg" property in the device.
Unlike other functions there is little sense in inlining this when
livetree is not being used because it has some logic in it and this would
just bloat the code size.
Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/core/Makefile | 2 | ||||
| -rw-r--r-- | drivers/core/read_extra.c | 37 |
2 files changed, 38 insertions, 1 deletions
diff --git a/drivers/core/Makefile b/drivers/core/Makefile index 435cf98ae1..fd2d4de0c8 100644 --- a/drivers/core/Makefile +++ b/drivers/core/Makefile @@ -15,4 +15,4 @@ obj-$(CONFIG_OF_LIVE) += of_access.o of_addr.o ifndef CONFIG_DM_DEV_READ_INLINE obj-$(CONFIG_OF_CONTROL) += read.o endif -obj-$(CONFIG_OF_CONTROL) += of_extra.o ofnode.o +obj-$(CONFIG_OF_CONTROL) += of_extra.o ofnode.o read_extra.o diff --git a/drivers/core/read_extra.c b/drivers/core/read_extra.c new file mode 100644 index 0000000000..a6d2f342d9 --- /dev/null +++ b/drivers/core/read_extra.c @@ -0,0 +1,37 @@ +/* + * Copyright (c) 2017 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#include <common.h> +#include <dm.h> +#include <dm/of_addr.h> +#include <dm/read.h> +#include <linux/ioport.h> + +int dev_read_resource(struct udevice *dev, uint index, struct resource *res) +{ + ofnode node = dev_ofnode(dev); + +#ifdef CONFIG_OF_LIVE + if (ofnode_is_np(node)) { + return of_address_to_resource(ofnode_to_np(node), index, res); + } else +#endif + { + struct fdt_resource fres; + int ret; + + ret = fdt_get_resource(gd->fdt_blob, ofnode_to_offset(node), + "reg", index, &fres); + if (ret < 0) + return -EINVAL; + memset(res, '\0', sizeof(*res)); + res->start = fres.start; + res->end = fres.end; + + return 0; + } +} |