Date: Tue, 29 Jan 2008 11:17:24 -0800 From: Nate Lawson <nate@root.org> To: =?ISO-8859-2?Q?Artur_Ba=E6?= <artur@ebasoft.com.pl> Cc: freebsd-acpi@freebsd.org Subject: Re: Need info about ACPI - implementing acer_acpi, amilo 1650g Message-ID: <479F7BC4.9000004@root.org> In-Reply-To: <200801291940.05952.artur@ebasoft.com.pl> References: <200801291205.m0TC5gQP052493@sana.init-main.com> <200801291940.05952.artur@ebasoft.com.pl>
next in thread | previous in thread | raw e-mail | index | archive | help
Artur Bać wrote: > Tuesday 29 of January 2008 13:05:42 Takanori Watanabe napisał(a): >> I have another laptop PC with ACPI WMI device, and try to implement >> some namespace detection. But leave untouched so long because >> I could not find how to make them do useful thing. >> >> http://www.init-main.com/a2000/acpi_wmi.c > > One thing that is suspicious in Your code > > if(AcpiEvaluateObject(devh, "_WDG", NULL, &wdg_buf)){ > device_printf(dev, "Cannot Fetch _WDG"); > return ENXIO; > } > > > Evaluate is aimed at calling methods As I understand interface, I didn't find > any other info for now. > > in my DSDT _WDG is a buffer not method... "Evaluate" means to run the method and return the value OR return the contents of the object if it is not a function. In your case, Evaluate will return an ACPI_BUFFER object. You can see code for dealing with that in many drivers, for instance sys/dev/acpica/acpi_perf.c -- Nate
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?479F7BC4.9000004>