Re: [PATCH] assign a default class to MPC adapter

[Wolfram Sang <w.sang-bIcnvbaLZ9MEGnE8C9+IrQ@public.gmane.org>]

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On Thu, Apr 16, 2009 at 03:36:12PM +0200, Michael Lawnick wrote:
> Wolfram Sang said the following:
> >> Could you please elaborate?
> > 
> > Instead of probing you specify the devices on the i2c-bus in the dts. Example
> > for the pcm032 looks like this (from the kernel-tree):
> > 
> > i2c@3d40 {
> > 	#address-cells = <1>;
> > 	#size-cells = <0>;
> > 	compatible = "fsl,mpc5200b-i2c","fsl,mpc5200-i2c","fsl-i2c";
> > 	reg = <0x3d40 0x40>;
> > 	interrupts = <2 16 0>;
> > 	fsl5200-clocking;
> > 
> > 	rtc@51 {
> > 		compatible = "nxp,pcf8563";
> > 		reg = <0x51>;
> > 	};
> > 	eeprom@52 {
> > 		compatible = "at24,24c32";
> > 		reg = <0x52>;
> > 	};
> > };
> > 
> > Boards which relied on probing need to have such child nodes added.
> 
> Ok, that doesn't help :-(
> I hoped you show me a way how to set the class of adapter. My clients
> are loaded with insmod, so dts has no effect (or is this wrong?)

Are you sure you put the correct names into the compatible field?

With my dts-files, I can see the i2c-devices in sysfs. After modprobing
the necessary modules, I can access the devices. Example on my current
board:

root@A:~ hwclock -r
hwclock: can't open '/dev/misc/rtc': No such file or directory
root@A:~ modprobe rtc-ds1307
rtc-ds1307 0-0068: rtc core: registered ds3231 as rtc0
root@A:~ hwclock -r
Sat Jan  1 01:23:06 2000  0.000000 seconds
root@A:~ hwclock -r
Sat Jan  1 01:23:12 2000  0.000000 seconds

Regards,

   Wolfram

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