u-boot.git/drivers/core/read.c, branch v2017.09

ofnode: add {ofnode, dev}_read_resource_byname()

2017-08-29T14:56:17+00:00

Linux supports platform_get_resource_byname() to look up a resource
by name.

We want a similar helper.  It is useful when a device node has named
register regions.

Signed-off-by: Masahiro Yamada 
Reviewed-by: Simon Glass

dm: core: Add ofnode_read_resource()

2017-07-28T18:02:47+00:00

We sometimes need to read a resource from an arbitrary node. In any case
for consistency we should not put the live-tree switching code in
a dev_read_...() function. Update this to suit.

Signed-off-by: Simon Glass 
Tested-by: Marcel Ziswiler 
Tested-on: Beaver, Jetson-TK1
Tested-by: Stephen Warren

dm: ofnode: change return type of dev_read_prop() to opaque pointer

2017-07-28T18:02:47+00:00

DT property values can be strings as well as integers.  This is why
of_get_property/fdt_getprop returns an opaque pointer.

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass

dm: ofnode: rename ofnode_read_prop() to ofnode_get_property()

2017-07-11T16:08:20+00:00

This function returns the pointer to the value of a node property.
The current name ofnode_read_prop() is confusing.  Follow the naming
of_get_property() from Linux.

The return type (const u32 *) is wrong.  DT property values can be
strings as well as integers.  This is why of_get_property/fdt_getprop
returns an opaque pointer.

Signed-off-by: Masahiro Yamada 
Acked-by: Simon Glass

dm: core: Add functions to obtain node's address/size cells

2017-07-11T16:08:20+00:00

The of_n_addr_cells() and of_n_size_cells() functions are useful for
getting the size of addresses in a node, but in a few places U-Boot needs
to obtain the actual property value for a node without walking up the
stack. Add functions for this and just the existing code to use it.

Add a comment to the existing ofnode functions which do not do the right
thing with a flat tree.

This fixes a problem reading PCI addresses.

Signed-off-by: Simon Glass 
Tested-by: Marcel Ziswiler 
Tested-on: Beaver, Jetson-TK1

dm: core: Add dev_read_enabled() to check if a device is enabled

2017-07-11T16:08:20+00:00

This function allows a device's status to be read. This indicates whether
the device should be enabled or disabled.

Note: In normal operation disabled devices will not be present in the
driver-model tree.

Signed-off-by: Simon Glass 
Tested-by: Marcel Ziswiler 
Tested-on: Beaver, Jetson-TK1

dm: core: Implement live tree 'read' functions

2017-06-01T13:03:08+00:00

When the live tree is supported some functions need to change a little.
Add an implementation which is used when not inlining these functions.

Signed-off-by: Simon Glass