Hello,
I'm Alan Tull, interested in dynamic features of device trees.
The following patch adds a char driver to add or remove device tree
nodes dynamically. Its ioctl passes a struct with:
- size of the blob
- pointer to the blob
The path to add the nodes under is coded in the blob with dummy nodes.
For example the following can be compiled into a blob and sent to this
driver adding a single node under /soc/apb_periphs:
/dts-v1/;
/ {
soc {
apb_periphs {
i2c1: i2c@ffc05000 {
compatible = "snps,designware-i2c";
reg = <0xffc05000 0x1000>;
interrupts = <0 159 4>;
emptyfifo_hold_master = <1>;
};
};
};
};
I wanted to get feeback early before I went too far down this particular
path. As such, this code doesn't do any notification for drivers yet.
Also it won't properly add nested nodes yet. It can add/remove a single
node and see it show up properly under /proc/device-tree.
Alan Tull
Altera
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