diff options
| -rw-r--r-- | drivers/core/Makefile | 2 | ||||
| -rw-r--r-- | drivers/core/read_extra.c | 37 | ||||
| -rw-r--r-- | include/dm/read.h | 12 |
3 files changed, 50 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; + } +} diff --git a/include/dm/read.h b/include/dm/read.h index 8c9846eaf2..65d5d1f357 100644 --- a/include/dm/read.h +++ b/include/dm/read.h @@ -14,6 +14,8 @@ #include <dm/ofnode.h> #include <dm/uclass.h> +struct resource; + #if CONFIG_IS_ENABLED(OF_LIVE) static inline const struct device_node *dev_np(struct udevice *dev) { @@ -42,6 +44,16 @@ static inline bool dev_of_valid(struct udevice *dev) return ofnode_valid(dev_ofnode(dev)); } +/** + * dev_read_resource() - obtain an indexed resource from a device. + * + * @dev: devuce to examine + * @index index of the resource to retrieve (0 = first) + * @res returns the resource + * @return 0 if ok, negative on error + */ +int dev_read_resource(struct udevice *dev, uint index, struct resource *res); + #ifndef CONFIG_DM_DEV_READ_INLINE /** * dev_read_u32_default() - read a 32-bit integer from a device's DT property |