On 11.01.2017 16:00, Mario Six wrote:
On boards that use DM, it is sometimes convenient and quicker to get a device
via its device tree path, since the devices used in the board initialization
routines are usually known beforehand.
This patch adds such a convenience function.
Signed-off-by: Mario Six <mario....@gdsys.cc>
---
Changes in v2:
New in v2
---
drivers/core/device.c | 7 +++++++
include/dm/device.h | 8 ++++++++
2 files changed, 15 insertions(+)
diff --git a/drivers/core/device.c b/drivers/core/device.c
index ed553d7..39d30b3 100644
--- a/drivers/core/device.c
+++ b/drivers/core/device.c
@@ -627,6 +627,13 @@ const char *dev_get_uclass_name(struct udevice *dev)
return dev->uclass->uc_drv->name;
}
+void dev_get_by_ofname(char *ofname, struct udevice *dev)
+{
+ int offset = fdt_path_offset(gd->fdt_blob, ofname);
+
+ device_get_global_by_of_offset(offset, &dev);
+}
+
fdt_addr_t dev_get_addr_index(struct udevice *dev, int index)
{
#if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
diff --git a/include/dm/device.h b/include/dm/device.h
index 9948bd4..402482c 100644
--- a/include/dm/device.h
+++ b/include/dm/device.h
@@ -340,6 +340,14 @@ enum uclass_id device_get_uclass_id(struct udevice *dev);
const char *dev_get_uclass_name(struct udevice *dev);
/**
+ * dev_get_by_ofname() - find a device via its device tree path
+ *
+ * @ofname: Device tree path to use ("/path1/path2/...")
+ * @dev: The found device or NULL
+ */
+void dev_get_by_ofname(char *ofname, struct udevice *dev);
I'm not 100% sure if the function naming is perfect here. Usually
these dev_get_xxx function work on a "dev" provided by the caller
and return something else (addr, size). The functions returning a
"device" are called device_get_xxx. And perhaps its also better stick
with using "struct udevice **devp" as parameter for
consistency as the other device_ functions do.
Simon, what do you think?
Thanks,
Stefan
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