On 2015-07-13 08:51, Nikolay Dimitrov wrote:
Hi Gary,
On 07/13/2015 05:37 PM, Gary Thomas wrote:
A bit off topic, but perhaps someone here knows the answer :-)
If my device tree has a device/element that is enabled, why would
that device be disabled when I boot? I have this on my (LS1021) board:
quadspi@1550000 {
compatible = "fsl,ls1-qspi";
#address-cells = <0x00000001>;
#size-cells = <0x00000000>;
reg = <0x00000000 0x01550000 0x00000000 0x00010000
0x00000000 0x40000000 0x00000000 0x04000000>;
reg-names = "QuadSPI", "QuadSPI-memory";
interrupts = <0x00000000 0x00000083 0x00000004>;
clock-names = "qspi_en", "qspi";
clocks = <0x00000003 0x00000001 0x00000003 0x00000001>;
big-endian;
amba-base = <0x40000000>;
num-cs = <0x00000002>;
status = "okay";
s70fl01gs@0 {
#address-cells = <0x00000001>;
#size-cells = <0x00000001>;
compatible = "spansion,s70fl01gs";
spi-max-frequency = <0x02faf080>;
reg = <0x00000000>;
partition@0 {
label = "s70fl01gs-0";
reg = <0x00000000 0x04000000>;
};
};
};
However when I boot the system, this device is disabled.
# cat /proc/device-tree/soc/quadspi@1550000/status
disabled
I know this must happen very early on as the device driver
for this device is never even probed.
Any ideas where/why this becomes disabled and how I keep that
from happening?
Is it possible to have an invalid device node parameter, which can
cause the node to become disabled? Have you seen related warn/err
messages in the bootlog? Also, is the ls1-qspi driver enabled in the
defconfig (stupid question, but sometimes we do such things :D).
No warnings/errors and the driver is enabled in the config.
What puzzles me is that the device tree says it should be enabled
but at run time it is not :-(
--
------------------------------------------------------------
Gary Thomas | Consulting for the
MLB Associates | Embedded world
------------------------------------------------------------
--
_______________________________________________
meta-freescale mailing list
[email protected]
https://lists.yoctoproject.org/listinfo/meta-freescale
