Hello, On 15-05-28 18:57:07, victorascroft@gmail.com wrote:

Hello Carlo,

On 15-05-26 16:26:45, Carlo Caione wrote:

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On Mon, May 25, 2015 at 11:02 AM, <victorascroft@gmail.com> wrote:

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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