Re: [PATCH v4] i2c: Add device tree support to i2c-pnx.c

From: Roland Stigge
Date: Thu Apr 19 2012 - 12:32:13 EST


On 04/19/2012 06:07 PM, Wolfram Sang wrote:
>> + - clock-frequency: desired I2C bus clock frequency in Hz,
>> Default: 100000 Hz + - pnx,timeout: I2C bus timeout in
>> milliseconds, Default: 10 ms
> I'd like to repeat my question to the devicetree folks here: Can we
> have timeout generic? It doesn't make sense to me to have that per
> vendor again and again.

Sounds completely reasonable.

To help make the devicetree conversion into 3.5, I would prefer to
integrate the "vendor,timeout" as-is if a longish standardization
process would block this, considering that we luckily only have 2-3 of
such timeout definitions currently.

I'd volunteer to clean up later by preparing a patch when there is a
standard timeout defined.

If we have a solution soon, I will prepare a new version of the patch,
of course, in the next days.

>> + i2c2: i2c@400a8000 { + compatible = "nxp,pnx-i2c"; + reg =
>> <0x400a8000 0x100>; + interrupt-parent = <&mic>; + interrupts =
>> <50 0>; + #address-cells = <1>; + #size-cells = <0>; +
>> clock-frequency = <0x186a0>; + pnx,timeout = <0x64>;
> Did you change this, too? Timeouts are better readable in dec :)

Right. But even when removing the "0x" in the timeout line above, it's
still hex, see Documentation/devicetree/booting-without-of.txt

Or did I get sth. wrong?


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