While the previous pass through fixed one place where we knew that
fdt_getprop would be given a positive len, in the case of 'fdt set' we
do not, so check that we did no get NULL from fdt_getprop().
Cc: Simon Glass <sjg@chromium.org>
Reported-by: Coverity (CID: 163249)
Fixes 72c98ed1ab ("fdt: Add a check to do_fdt() for coverity")
Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
We know that fdt_getprop() does not return NULL when len is > 0 but
coverity does not. Add an extra check to keep it happy.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Coverity (CID: 163248)
We know that fdt_getprop() does not return NULL when len is > 0 but
coverity does not. Add an extra check to keep it happy.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reported-by: Coverity (CID: 163249)
Fixes: bc80295b (fdt: Add get commands to fdt)
With this commit we can modify single values within an array of a dts
property.
This is useful if we have for example a pwm-backlight where we want to
modifiy the pwm frequency per u-boot script.
The pwm is described in dts like this:
backlight {
pwms = <0x0000002b 0x00000000 0x004c4b40>;
};
For changing the frequency, here the 3rd parameter, we simply type:
fdt set /backlight pwms <? ? 0x1E8480>;
For doing all this we:
- backup the property content into our 'SCRATCHPAD'
- only modify the array-cell if the new content doesn't start with '?'
Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
On a Raspberry Pi 2 disagreements on cell endianness can be observed:
U-Boot> fdt print /soc/gpio@7e200000 phandle
phandle = <0x0000000d>
U-Boot> fdt get value myvar /soc/gpio@7e200000 phandle; printenv myvar
myvar=0x0D000000
Fix this by always treating the pointer as BE and converting it in
fdt_value_setenv(), like its counterpart fdt_parse_prop() already does.
Consistently use fdt32_t, fdt32_to_cpu() and cpu_to_fdt32().
Fixes: bc80295 ("fdt: Add get commands to fdt")
Cc: Joe Hershberger <joe.hershberger@ni.com>
Cc: Gerald Van Baren <gvb@unssw.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Simon Glass <sjg@chromium.org>
There are lots of reason why a FDT application might fail, the
error code might give an indication. Let the error code translate
in a error string so users can try to understand what went wrong.
Signed-off-by: Stefan Agner <stefan.agner@toradex.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Simon Glass <sjg@chromium.org>
The function that is processing the 'fdt' parameters is one big
if-else if. In order to be able to type command faster only the first
few letter are checked to know which block of code to execute. For
systemsetup, the block of code that was executed was always the wrong
one and ended up in a failure.
} else if (argv[1][0] == 's') {
process "fdt set" command
} else if (strncmp(argv[1], "sys", 3) == 0) {
process "fdt systemsetup" command.
}
When typing "fdt systemsetup", the code that was executed was the code
for "fdt set".
This commit fix this issue by moving the "else if" for systemsetup
before the else if for "fdt set". This allow us to keep compatibility
with any script that make use of "fdt s" to set node values.
Signed-off-by: Fabien Parent <fparent@baylibre.com>
Acked-by: Simon Glass <sjg@chromium.org>
Sometimes devicetree nodes and or properties are added out of the u-boot
console, maybe through some script or manual interaction.
The devicetree as loaded or embedded is quite small, so the devicetree
has to be resized to take up those new nodes/properties.
In original the devicetree was only extended by effective
4 * add_mem_rsv.
With this commit we can add an argument to the "fdt resize" command,
which takes the extrasize to be added.
Signed-off-by: Hannes Schmelzer <hannes.schmelzer@br-automation.com>
Signed-off-by: Hannes Schmelzer <oe5hpm@oevsv.at>
Acked-by: Simon Glass <sjg@chromium.org>
The device tree overlays are a good way to deal with user-modifyable
boards or boards with some kind of an expansion mechanism where we can
easily plug new board in (like the BBB or the raspberry pi).
However, so far, the usual mechanism to deal with it was to have in Linux
some driver detecting the expansion boards plugged in and then request
these overlays using the firmware interface.
That works in most cases, but in some cases, you might want to have the
overlays applied before the userspace comes in. Either because the new
board requires some kind of an early initialization, or because your root
filesystem is accessed through that expansion board.
The easiest solution in such a case is to simply have the component before
Linux applying that overlay, removing all these drawbacks.
Reviewed-by: Stefan Agner <stefan@agner.ch>
Acked-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The current code only checks if the fdt subcommand is fdt addr by checking
whether it starts with 'a'.
Since this is a pretty widely used letter, narrow down that check a bit.
Acked-by: Simon Glass <sjg@chromium.org>
Acked-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Now that they are in their own directory, we can remove this prefix.
This makes it easier to find a file since the prefix does not get in the
way.
Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Heiko Schocher <hs@denx.de>
Acked-by: Stefan Roese <sr@denx.de>
Acked-by: Przemyslaw Marczak <p.marczak@samsung.com>
