Some I2C chipsets are architecture-specific

Some of the i2c chipsets look architecture specific, so don't trouble other architectures with these questions. It's quite possible I'm mistaken, so please double-check.

Index: ./drivers/i2c/chips/Kconfig
=================================RCS file: /var/cvs/linux-2.6/drivers/i2c/chips/Kconfig,v retrieving revision 1.17

diff -u -p -r1.17 Kconfig
@@ -53,7 +53,7 @@ config SENSORS_ADM1031
 
 config SENSORS_ASB100
 	tristate "Asus ASB100 Bach"
-	depends on I2C && EXPERIMENTAL
+	depends on I2C && X86 && EXPERIMENTAL
 	select I2C_SENSOR
 	help
 	  If you say yes here you get support for the ASB100 Bach sensor

@@ -266,7 +266,7 @@ config SENSORS_SMSC47M1
 
 config SENSORS_VIA686A
 	tristate "VIA686A"
-	depends on I2C && PCI && EXPERIMENTAL
+	depends on I2C && X86 && PCI && EXPERIMENTAL
 	select I2C_SENSOR
 	select I2C_ISA
 	help

"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain

Hi Matthew,

Yes, I think this makes sense. This is an integrated sensor in an x86 southbridge.

On a more generic approach, SMBus/I2C clients shouldn't be limited to x86. OTOH, some ISA hardware monitoring chips (which all have "select I2C_ISA") are more likely to be x86-specific. In fact these chips fall into three categories:
1* I2C/SMBus chip with an additional ISA access (not tagged "select I2C_ISA")
2* Super-I/O chips with integrated sensors.
3* Southbridges with integrated sensors.

For category 1 we obviously cannot limit to x86 (same as I2C-only chips, can be found on any architecture, at least in theory).

For category 2 I'm not sure, I know these Super-I/O chips are normaly found only on PCs, but I remember of some embedded devices made by Soekris (net4801) which were using Super-I/O chips as well. I think these net4801 are 586-based so x86, but maybe other similar devices use non-x86 arch?

For category 3 I guess it's safe to limit to x86. The via686a driver falls into this category. The recently added sis5595 driver does as well, and so will the vt1211 and vt8231 drivers once they are ported to Linux 2.6.

I am open to discussion about this, as I only have vague ideas on what can or cannot be found on other architectures. I admit I had never considered limiting hardware monitoring device drivers according to achitecture, but that sounds like a good idea to me (providing we know what we are doing, of course).

Thanks,
--
Jean Delvare