Hello,
On 15-05-28 18:57:07, victorascroft@xxxxxxxxx wrote:
> Hello Carlo,
>
> On 15-05-26 16:26:45, Carlo Caione wrote:
> > On Mon, May 25, 2015 at 11:02 AM, <victorascroft@xxxxxxxxx> wrote:
> > > Hello,
> > >
> > > I have a query related to device tree. If I have three nodes as below
> > >
> > > node1: node1@addr1 {
> > > compatible ="name1", "syscon";
> > > }
> > >
> > > node2: node1@addr2 {
> > > compatible ="name2", "syscon";
> > > }
> > >
> > > node3: node1@addr3 {
> > > compatible ="name3", "syscon";
> > > }
> > >
> > >
> > > At the top soc node, I define phandles as follows
> > >
> > > node-phandle1 = <&node1 0x10>
> > > node-phandle2 = <&node2 0x20>
> > > node-phandle3 = <&node3 0x30>
> > >
> > > How can I read the values of 0x10, 0x20 and 0x30 while using the node-phandlex
> > > property? Is it possible using one of the of_* functions?
> > >
> > > The driver binds to one of the syscon nodes above lets say node3.
> >
> > http://lxr.free-electrons.com/source/drivers/of/base.c#L1597
>
> Thanks. This worked out. Is it also possible to read a clock reference for
> enabling a clock?
>
> node1 : node@addr1 {
> compatible = "name1";
> node2-phandle = <&node2>;
> }
>
> node2 : node@addr2 {
> compatible = "name2";
> clocks = <&clks DEVICE_CLK_PER>;
> }
>
> In the driver of node 1 I can get node2 and map it. Would it be possible
> to get the clock reference for enabling the clock. Basically node2 does
> not have the driver and node 1 would require access to node 2 peripheral.
I guess of_clk_get does it.
- Victor
_______________________________________________
Kernelnewbies mailing list
Kernelnewbies@xxxxxxxxxxxxxxxxx
http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
