Commit graph

10 commits

Author SHA1 Message Date
Simon Glass
878d68c0c3 dm: core: Add functions to obtain node's address/size cells
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 <sjg@chromium.org>
Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1
2017-07-11 10:08:20 -06:00
Simon Glass
23d6326791 dm: regmap: Add support for livetree
Modify regmap to support livetree.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:09 -06:00
Simon Glass
da409ccc4a dm: core: Replace of_offset with accessor (part 2)
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-06-01 07:03:04 -06:00
Jean-Jacques Hiblot
1804044f30 regmap: use fdt address translation
In the DTS, the addresses are defined relative to the parent bus. We need
to translate them to get the address as seen by the CPU core.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2017-03-22 07:27:19 -06:00
Simon Glass
e160f7d430 dm: core: Replace of_offset with accessor
At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.

Signed-off-by: Simon Glass <sjg@chromium.org>
2017-02-08 06:12:14 -07:00
Paul Burton
3bfb8cb43b dm: regmap: Implement simple regmap_read & regmap_write
The regmap_read & regmap_write functions were previously declared in
regmap.h but not implemented anywhere. The regmap implementation &
commit message of 6f98b7504f ("dm: Add support for register maps
(regmap)") indicate that only memory mapped accesses are supported for
now, so providing simple implementations of regmap_read & regmap_write
is trivial. The access size is presumed to be 4 bytes & endianness is
presumed native, which are the defaults for the regmap code in Linux.

Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
2016-09-21 15:04:32 +02:00
Simon Glass
1e6ca1a6ad dm: core: Add an implementation of regmap_init_mem_platdata()
Add an implementation of this function which mirrors the functions of the
automatic device-tree implementation. This can be used with of-platdata to
create regmaps.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
a951431e82 dm: core: Move regmap allocation into a separate function
We plan to add a new way of creating a regmap for of-platdata. Move the
allocation code into a separate function so that it can be shared.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
3b2a29e097 dm: regmap: Add a dummy implementation for of-platdata
Add a placeholder for now so that this code will compile. It currently does
nothing.

Signed-off-by: Simon Glass <sjg@chromium.org>
2016-07-14 20:40:24 -06:00
Simon Glass
6f98b7504f dm: Add support for register maps (regmap)
Add a simple implementaton of register maps, supporting only direct I/O
for now. This can be enhanced later to support buses which have registers,
such as I2C, SPI and PCI.

It allows drivers which can operate with multiple buses to avoid dealing
with the particulars of register access on that bus.

Signed-off-by: Simon Glass <sjg@chromium.org>
2015-07-21 17:39:23 -06:00