Re: [PATCH][Trvial 2.5.59] rtc.c is requesting more ioports then it really uses

From: Randy.Dunlap (rddunlap@osdl.org)
Date: Fri Feb 07 2003 - 18:18:25 EST

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In reply to: Rusty Lynch: "[PATCH][Trvial 2.5.59] rtc.c is requesting more ioports then it really uses"
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On 7 Feb 2003, Rusty Lynch wrote:

| I need to enable a device that talks to port 0x79h, but for some
| reason the rtc is requesting move bytes then it really uses. Here
| is a patch that makes the rtc only request what it uses.
|
| --rustyl
|
| --- drivers/char/rtc.c.orig 2003-02-07 14:35:31.000000000 -0800
| +++ drivers/char/rtc.c 2003-02-07 13:25:45.000000000 -0800
| @@ -47,7 +47,7 @@
|
| #define RTC_VERSION "1.11"
|
| -#define RTC_IO_EXTENT 0x10 /* Only really two ports, but... */
| +#define RTC_IO_EXTENT 0x2
|
| /*
| * Note that *all* calls to CMOS_READ and CMOS_WRITE are done with
| -

Some Intel chipset specs list RTC as using 0x70 - 0x77, probably with
some aliasing in there, so it looks to me like an EXTENT of 8 would be
safer and still allow you access to 0x79.

I'm looking at 82801BA-ICH2, 82801-ICH3, and 82801AA-ICH0 specs.

-- ~Randy

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