Commit graph

2724 commits

Author SHA1 Message Date
Tom Rini
8308a28af8 Merge tag 'ti-v2021.04-rc2' of https://gitlab.denx.de/u-boot/custodians/u-boot-ti
- Sync DTS from Linux kernel for all K3 platforms
- Add MMC higher speed nodes for AM65x, J721e, J7200
- Convert Nokia RX-51 to use CONFIG_DM_MMC
- Minor fixes for LEGO MINDSTORMS
2021-02-05 09:39:31 -05:00
Tom Rini
55ffabec7f Pull request for UEFI sub-system for efi-2021-04-rc2
Bug fixes:
 
 * do not allow creating of files with filenames on FAT file system
 * install UEFI System Partition GUID on ESP handle
 * in dtbdump.efi test tool use GUID to find ESP handle
 
 Documentation:
 
 * man-page for load command
 * describe end of life of plat_auto
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Merge tag 'efi-2021-04-rc2' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for UEFI sub-system for efi-2021-04-rc2

Bug fixes:

* do not allow creating of files with filenames on FAT file system
* install UEFI System Partition GUID on ESP handle
* in dtbdump.efi test tool use GUID to find ESP handle

Documentation:

* man-page for load command
* describe end of life of plat_auto
2021-02-04 17:35:50 -05:00
Heinrich Schuchardt
5489448cd7 doc: dm: describe end of life of plat_auto
Describe when plat_auto is freed.

Fix a typo.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-04 20:36:07 +01:00
Heinrich Schuchardt
4038c6e848 doc: return value exception command
If the exception cannot be raised, the command returns.
Currently the return values are not all the same.

Remove the sub-chapter 'Return value'

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-02-04 20:36:06 +01:00
Heinrich Schuchardt
f074209ce9 doc: describe load command
Man-page for load command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-02-04 20:36:06 +01:00
Suman Anna
468ec2f3ef remoteproc: k3_r5: Sync to upstreamed kernel DT property names
The K3 R5F remoteproc driver in U-Boot was upstreamed prior to the
equivalent remoteproc driver in the Linux kernel. Some of the DT
properties used in U-Boot got upstreamed using different names
in Linux kernel.

The modified property names include the R5F cluster mode configuration
property "lockstep-mode"; and three different individual R5F core config
properties - "atcm-enable", "btcm-enable" and "loczrama". The property
names were updated as follows:
  lockstep-mode => ti,cluster-mode
  atcm-enable   => ti,atcm-enable
  btcm-enable   => ti,btcm-enable
  loczrama      => ti,loczrama

Update the K3 R5F remoteproc driver, the corresponding binding, and
all the existing usage in AM65x, J721E and J7200 dts files all at
once to use the new properties and to not break any bisectability.

Signed-off-by: Suman Anna <s-anna@ti.com>
2021-02-04 20:37:56 +05:30
Simon Glass
7a3c628c43 dm: core: Add documentation about device removal
Make mention of this feature in the core documentation so people can
discover it without looking at a header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
2021-02-03 03:38:41 -07:00
Tom Rini
b4804cdd57 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-usb
- Assorted gadget changes including:
  - dfu: Fix handling of UBI partitions in MTD backend
  - gadget: f_thor: fix wrong file size cast
  - Extend cmd: bcb
  - Fixes for fastboot and rockchip gadgets
  - dfu: Add SCRIPT and SKIP entities
  - dfu/thor: Add `dfu_alt_info` reinitialization from flashed script
  - u-boot: Reduce size of u-boot as usbd_device_* arrays are not exported
2021-01-31 14:24:35 -05:00
Marek Szyprowski
c533f94c10 dfu: add 'SCRIPT' entity
Define a new 'SCRIPT' type for DFU entities. The downloaded data are
treated as simple u-boot's scripts and executed with run_command_list()
function.

Flashing the 'SCRIPT' entity might result in changing the 'dfu_alt_info'
environment variable from the flashed script, so add a global variable
for tracking the potential need to reinitialize the dfu_alt_info related
structures.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2021-01-31 14:08:56 +01:00
Jaehoon Chung
b5f3405b9d dfu: add 'SKIP' entity
Define a new 'SKIP' type for the DFU entities. The flashed data for that
entity is simply ignored without returning any error values.

This allows to have one flashing procedure and images for the different
board types or variants, where each board uses only the images relevant
to it and skips the rest. This is especially usefull for the THOR
protocol, which usually transfers more than one file in a single session.

Signed-off-by: Jaehoon Chung <jh80.chung@samsung.com>
Reviewed-by: Minkyu Kang <mk7.kang@samsung.com>
[mszyprow: rephrased commit message and docs for easier reading, changed
	   subject to "dfu: add 'SKIP' entity"]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
2021-01-31 14:08:56 +01:00
Heinrich Schuchardt
43db07507a sandbox: keep time offset when resetting
The UEFI Self Certification Test (SCT) checks the SetTime() service with
the following steps:

* set date
* reset
* check date matches

To be compliant the sandbox should keep the offset to the host RTC during
resets. The implementation uses the environment variable
UBOOT_SB_TIME_OFFSET to persist the offset.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:42 -07:00
Heinrich Schuchardt
3096ee866e doc/sandbox: improve formatting of command line options
Show the command line options in bold.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-30 14:25:41 -07:00
Ying-Chun Liu (PaulLiu)
e89ef172f8 doc: device-tree-bindings: rtc: Abracon AB x80x i2c rtc
Document the bindings for abracon,abx80x and related compatibles.

Signed-off-by: Ying-Chun Liu (PaulLiu) <paul.liu@linaro.org>
2021-01-27 17:07:48 -05:00
Tom Rini
8b195f4b71 Merge https://gitlab.denx.de/u-boot/custodians/u-boot-marvell
- Espressobin: Disable slot when emmc is not present (Pali)
- DS414; config header cleanup (Phil)
- PCI: auto-config enhancement (Phil)
- pci_mvebu: Also map IO region (Phil)
- serial: a3720: Implement pending method for output direction (Pali)
- turris_mox: Enable a few commands (Marek)
- helios4 & ClearFog changes (Dennis)
- Plus some minor misc changes
2021-01-27 11:39:31 -05:00
Tom Rini
290e40b2aa Pull request for documentation tag doc-2021-04-rc1-3
Update the build system for the HTML documentation to allow using
 Sphinx 3.
 
 Man-page for exception command.
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Merge tag 'doc-2021-04-rc1-3' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for documentation tag doc-2021-04-rc1-3

Update the build system for the HTML documentation to allow using
Sphinx 3.

Man-page for exception command.
2021-01-27 11:32:23 -05:00
Neil Armstrong
69076dff22 cmd: pxe: add support for FDT overlays
This adds support for specifying FDT overlays in an extlinux/pxelinux
configuration file.

Without this, there is no simple way to apply overlays when the kernel
and fdt is loaded by the pxe command.

This change adds the 'fdtoverlays' keyword for a label, supporting multiple
overlay files to be applied on top of the fdt specified in the 'fdt' or
'devicetree' keyword.

Example:
  label linux
    kernel /Image
    fdt /soc-board.dtb
    fdtoverlays /soc-board-function.dtbo
    append console=ttyS0,115200 root=/dev/mmcblk0p2 rootwait

This code makes usage of a new variable called fdtoverlay_addr_r used to load
the overlay files without overwritting anything important.

Cc: Tom Rini <trini@konsulko.com>
Cc: Andre Heider <a.heider@gmail.com>
Cc: Jernej Škrabec <jernej.skrabec@siol.net>
Cc: Jonas Karlman <jonas@kwiboo.se>
Tested-by: Jernej Škrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Škrabec <jernej.skrabec@siol.net>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
2021-01-27 10:47:54 -05:00
Heinrich Schuchardt
25be4d336f doc: exception command
Create man-page for exception command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-27 12:52:57 +01:00
Heinrich Schuchardt
98f01cf7a2 doc: update Kernel documentation build system
Update the documentation build system according to Linux v5.11-rc1.

Deactive the automarkup.py extension module which on Gitlab CI is
incompatible with Unicode.

With this patch we can build the HTML documentation using either of
Sphinx 2 and Sphinx 3.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-27 12:52:57 +01:00
Heinrich Schuchardt
a6aaeb2a91 doc: fix doc/develop/logging.rst
Sphinx 3 builds fail due to doc/develop/logging.rst producing duplicate
labels.

Include logging.h only once in the API section and use cross-references for
the enums log_level_t and log_category_t.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-27 12:52:57 +01:00
Heinrich Schuchardt
c7d2b2ccd3 doc: board: fix Microchip MPFS Icicle Kit doc
Two sibling headings (here eMMC) cannot have the same title.

Warning, treated as error:
doc/board/microchip/mpfs_icicle.rst:423:duplicate label
board/microchip/mpfs_icicle:emmc, other instance in
doc/board/microchip/mpfs_icicle.rst
make[1]: *** [doc/Makefile:69: htmldocs] Error 2

* Correct the heading levels.
* Add missing empty lines after headings.

Fixes: 9e550e1830 ("doc: board: Add Microchip MPFS Icicle Kit doc")
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-27 12:52:57 +01:00
Dennis Gilmore
74f8977ee9 ARM: Distro boot: document the need for fdtfile variable to be set
When testing builds provided in https://github.com/openwrt/openwrt/pull/3360
I discovered that fdtfile was not set and as a result the firmware was not
functional. So I am documenting what is needed.

Signed-off-by: Dennis Gilmore <dennis@ausil.us>

Cc: Atish Patra <atish.patra@wdc.com>
Cc: Lukas Auer <lukas.auer@aisec.fraunhofer.de>
Cc: Tom Rini <trini@konsulko.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Vagrant Cascadian <vagrant@debian.org>
Cc: Stephen Warren <swarren@nvidia.com>
Cc: Karsten Merker <merker@debian.org>
2021-01-27 07:25:39 +01:00
Tom Rini
7f10b8eed4 Pull request for documentation tag doc-2021-04-rc1 (2)
* Man-pages for sbi, exit, for, echo, loady, true, false, conitrace
 * Adjust suppression of newline in echo command.
 * Provide unit test for echo command.
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Merge tag 'doc-2021-04-rc1-2' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for documentation tag doc-2021-04-rc1 (2)

* Man-pages for sbi, exit, for, echo, loady, true, false, conitrace
* Adjust suppression of newline in echo command.
* Provide unit test for echo command.
2021-01-25 09:02:06 -05:00
Tom Rini
aee5bcce35 Second set of u-boot-atmel features for 2021.04 cycle
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Merge tag 'u-boot-atmel-2021.04-b' of https://gitlab.denx.de/u-boot/custodians/u-boot-atmel

Second set of u-boot-atmel features for 2021.04 cycle

This feature set includes macb updates for all interfaces and new
sama7g5 variant support; micrel ksz9031 DLL support; a new board from
Giant based on Adafruit feather form factor which contains a SAMA5D27
SoC; several fixes regarding the NAND flash PMECC block; and pincontrol
drive strength support for pio4 controller.
2021-01-25 09:01:28 -05:00
Heinrich Schuchardt
5b6dac01e6 doc: describe command conitrace
Provide a man-page for the conitrace command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:34 +01:00
Heinrich Schuchardt
bce86e075f doc: describe the false command
Provide a man-page for the false command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:34 +01:00
Heinrich Schuchardt
9d4445bc6d doc: document true command
Create a man-page for the true command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:34 +01:00
Heinrich Schuchardt
a3ad3079c0 doc: describe loady command
Create a man-page for the loady command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:34 +01:00
Heinrich Schuchardt
750ff62da7 doc: document echo command
Provide a man-page for the echo command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-25 01:15:33 +01:00
Heinrich Schuchardt
de702493c4 doc: document for statement
Create a man-page for the for statement.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:33 +01:00
Heinrich Schuchardt
627b57bde0 doc: describe exit command
Man-page for exit shell command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:33 +01:00
Heinrich Schuchardt
9c6d050966 doc: document sbi command
Add a man-page for the sbi command.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-25 01:15:33 +01:00
Tom Rini
e716c90229 Revert "doc: update Kernel documentation build system"
Unfortunately we now see a number of now-fatal warnings about duplicate
labels.  It is often unclear how best to re-write the document in
question to not duplicate these otherwise logical headings.

This reverts commit 10a1df3cd4.

Signed-off-by: Tom Rini <trini@konsulko.com>
2021-01-23 12:51:37 -05:00
Heinrich Schuchardt
12316967ad doc: move README.menu to HTML documentation
Convert README.menu to reStructured text and add it to the HTML
documentation.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-23 09:53:46 -05:00
Heinrich Schuchardt
0157619d5c doc: move test/py/README.md to HTML documentation
Convert test/py/README.md to restructured text and add it to the generated
HTML documentation.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-23 09:53:46 -05:00
Heinrich Schuchardt
ca6583d4e0 doc: move test/README to HTML documentation
Move test/README to the 'Develop U-Boot' chapter of the HTML documentation.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-23 09:53:46 -05:00
Heinrich Schuchardt
948991f764 doc: structure doc/develop/index.rst
Provide sub-chapters for 'Develop U-Boot'

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-23 09:53:46 -05:00
Patrick Delaunay
9153924bc1 doc: update help message
Update the help message used for 'make help':

  Documentation targets:
    Linux kernel internal documentation in different formats from ReST:
=>
    U-Boot documentation in different formats from ReST:

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
2021-01-23 09:53:46 -05:00
Heinrich Schuchardt
10a1df3cd4 doc: update Kernel documentation build system
Update the docomentation build system according to Linux v5.11-rc1.

With this patch we can build the HTML documentation using either of
Sphinx 2 and Sphinx 3.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
[Fix warning in b4860qds.rst about "Switch Settings"]
Signed-off-by: Tom Rini <trini@konsulko.com>
2021-01-23 09:53:17 -05:00
Alexandru Gagniuc
4afc4f37c7 doc: FIT image: Clarify format and simplify syntax
** Introduction

There are currently four ways to load an OS image with u-boot
  1. SPL -> u-boot -> bootm
  2. SPL blue falcon mode
  3. "Basic" FIT image (CONFIG_LOAD_FIT)
  4. "Full-featured" FIT image (CONFIG_LOAD_FIT_FULL)

These four code paths were developed independently, and share very
little code. (3) and (4), behave very differently, are littered with
special cases. They even have different DTS syntax and properties.

The cause of this divergence is that the FIT format specification
leaves a number of things open to interpretation. The purpose of this
change is to enable the reduction of code size, duplication, and
complexity by updating and streamlining the FIT format.

We are only marginally concerned with backwards compatibility, because
we don't have inter-compatibility. For example, CONFIG_LOAD_FIT is
able to load images that CONFIG_LOAD_FIT_FULL won't. This is a direct
result of the incompatible syntax between the two implementations.

Ideally, these changes would enable "simple" FIT to be a subset of the
"full" fit implementation, and share most code. These changes should
also eliminate the need for falcon mode (although we are not
advocating for the removal of falcon mode at this time).

** Description of changes

 * The "configurations" node is now mandatory

Guessing how to load components based on their "os" and "type" invites
confusion and superfluous heuristics. Instead, require each FIT image
to be explicit on how components should be loaded.

 * Eliminate "ramdisk", "setup", "standalone", and "fpga" properties

Having too many special purpose properties requires special-casing
FIT loading code. When a special property can be handled by another
property, it is redundant.
 - A "ramdisk" is identical to a loadable. Thus ramdisk images should
   be placed under "loadables".
 - A "setup" node can be achieved by using a "kernel" or "firmware"
   property instead.
 - "standalone" is used for u-boot nodes. The correct property to use
   in this case is "firmware".
 - "fpga" is a loadable

 * Prioritize control between "firmware" and "kernel"

"firmware" and "kernel" are special nodes in that control is passed
to the "entry-point" of the image. Both can be present, for example,
an OP-TEE firmware with a linux kernel. When both are present,
control is passed to the "firmware" image.

** Further generalizations (not included herein)

The "firmware" and "kernel" properties could be generalized as a
"next-boot-stage", or similar name. This "next" stage would be special
in that it is both executable, and is the stage that is passed
control. For example, "next-stage" could be an op-tee image, with
linux as a loadable, or a u-boot image.

Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
2021-01-22 16:17:33 -05:00
Eugen Hristev
63c27c3e66 dt-bindings: pinctrl: at91-pio4: add property for drive strength
Add drive strength property which is equivalent with the one in Linux

Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com>
2021-01-22 15:09:59 +02:00
Andrey Zhizhikin
1396e41c1f doc: board: freescale: advise to use newer atf and firmware
Update branch and version information of ATF and DDR firmware files to
point to latest releases provided by NXP.

This is especially critical for imx8mp evk, as the ATF support for that
SoC is only available in latest releases.

Align all SoCs from imx8m family to use identical revisions of ATF and
DDR firmware.

Signed-off-by: Andrey Zhizhikin <andrey.zhizhikin@leica-geosystems.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
2021-01-18 15:23:06 -05:00
Tom Rini
59e4e391df Merge https://gitlab.denx.de/u-boot/custodians/u-boot-riscv
- Update qemu-riscv.rst build instructions.
- Add support for SPI on Kendryte K210.
- Add Microchip PolarFire SoC Icicle Kit support.
- Add support for an early timer.
  - Select TIMER_EARLY to avoid infinite recursion for Trace.
2021-01-18 08:04:28 -05:00
Tom Rini
b5b0237d02 Pull request for documentation tag doc-2021-04-rc1
* document man-page base command
 * move README.fdt-overlays to HTML documentation
 * add synopsis for pstore command
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Merge tag 'doc-2021-04-rc1' of https://gitlab.denx.de/u-boot/custodians/u-boot-efi

Pull request for documentation tag doc-2021-04-rc1

* document man-page base command
* move README.fdt-overlays to HTML documentation
* add synopsis for pstore command
2021-01-18 08:04:05 -05:00
Padmarao Begari
9e550e1830 doc: board: Add Microchip MPFS Icicle Kit doc
This doc describes the procedure to build, flash and
boot Linux using U-boot on Microchip MPFS Icicle Kit.

Signed-off-by: Padmarao Begari <padmarao.begari@microchip.com>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
2021-01-18 11:06:39 +08:00
Sean Anderson
8f78e52794 riscv: Add support for SPI on Kendryte K210
This enables configs necessary for using SPI. The environment is saved to
the very end of SPI flash. This is unlikely to be overwritten unless the
entire flash is reprogrammed.

This also supplies a default bootcommand. It loads an image and device tree
from the first partition of the MMC. This is a minimal/least effort
bootcmd, so suggestions (especially in the form of patches) are welcome. I
didn't set up distro boot because I think it is unlikely that any
general-purpose linux distros will ever be ported to this board.

Signed-off-by: Sean Anderson <seanga2@gmail.com>
Tested-by: Chrstopher Obbard <obbardc@gmail.com>
Reviewed-by: Rick Chen <rick@andestech.com>
2021-01-18 11:06:26 +08:00
Atish Patra
24c5689447 doc: qemu-riscv: Fix opensbi build instructions
Latest opensbi uses generic platform for Qemu. Update the build
instructions.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
Reviewed-by: Bin Meng <bin.meng@windriver.com>
Reviewed-by: Rick Chen <rick@andestech.com>
2021-01-18 11:06:20 +08:00
Rasmus Villemoes
214cc199b4 doc/README.gpt: reflow partition type GUID table
The previous patch made the table look bad. Fix it, and leave some
space for a future element being a bit longer than the current
maximum.

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2021-01-16 14:49:09 -05:00
Rasmus Villemoes
c0364ce1c6 doc/README.gpt: define partition type GUID for U-Boot environment
When setting aside a GPT partition for holding the U-Boot environment,
having a partition type GUID [1] indicating "Linux filesystem" (as
most tools default to) is somewhat misleading - and there's no other
well-known type GUID that is better suited. So to have a canonical
value to put into the type field, define

    3de21764-95bd-54bd-a5c3-4abe786f38a8

to mean a partition holding a U-Boot environment.

This is a v5 namespace-name GUID [2], generated [3] from a namespace
of "25cbcde0-8642-47c6-a298-1a3a57cd256b" and name "U-Boot
environment".

Should future type GUIDs be defined in the context of U-Boot, it's
sensible to use that same namespace GUID.

[1] https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs
[2] https://en.wikipedia.org/wiki/Universally_unique_identifier#Versions_3_and_5_(namespace_name-based)
[3] https://www.uuidtools.com/v5

Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
2021-01-16 14:49:09 -05:00
Heinrich Schuchardt
dd9abfec13 doc: sifive: fu540: fix heading levels
Two sibling headings cannot have the same name.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-16 11:17:20 +01:00
Heinrich Schuchardt
4f792d232d doc: move README.fdt-overlays to HTML documentation
Convert doc/README.fdt-overlays to doc/usage/fdt_overlays.rst.

Edit the text for readability.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
2021-01-16 11:17:20 +01:00