----- Original Message ----- > Hi Tim, > > On Tue, 5 Jul 2011 12:06:13 -0500 (CDT), Tim Nelson wrote: > > I've done that: > > > > root@aaa:~# lsmod | grep i2c > > i2c_dev 3382 0 > > i2c_core 12703 1 i2c_dev > > > > But, nothing of interest in dmesg other than: > > > > [108414.944722] i2c /dev entries driver > > > > and running i2cdetect still turns up nothing: > > > > root@aaa:~# i2cdetect -l > > > > Any thoughts? Does this specific Winbond chip require a device > > specific kernel module to operate such as those found in > > /lib/modules/2.6.32-5-486/kernel/drivers/i2c/busses ? > > As I understand it, the W83L604G is a GPIO expander on I2C/SMBus, so > what it needs is a driver in drivers/gpio. We don't seem to have > support > for it yet, unless it is 100% compatible with another device we > already > support. > > On top of that, you need a driver for the I2C/SMBus controller on your > mainboard, to which the W83L604G is connected. Without it, you won't > even be able to talk to the W83L604G. You did not tell us anything > about your system so we can't tell you which driver that would be - if > we have a driver at all. Does lspci say anything about SMBus? If not, > what is your system based on? > Greetings Jean- The board is running an AMD Geode LX CPU with the CS5536 companion chip. Here is the output of lspci: root@aaa:~# lspci 00:01.0 Host bridge: Advanced Micro Devices [AMD] CS5536 [Geode companion] Host Bridge (rev 33) 00:01.1 VGA compatible controller: Advanced Micro Devices [AMD] Geode LX Video 00:01.2 Entertainment encryption device: Advanced Micro Devices [AMD] Geode LX AES Security Block 00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6105M [Rhine-III] (rev 96) 00:0f.0 Ethernet controller: VIA Technologies, Inc. VT6105M [Rhine-III] (rev 96) 00:12.0 Communication controller: Tiger Jet Network Inc. Tiger3XX Modem/ISDN interface 00:13.0 ISA bridge: Advanced Micro Devices [AMD] CS5536 [Geode companion] ISA (rev 03) 00:13.2 IDE interface: Advanced Micro Devices [AMD] CS5536 [Geode companion] IDE (rev 01) 00:13.4 USB Controller: Advanced Micro Devices [AMD] CS5536 [Geode companion] OHC (rev 02) 00:13.5 USB Controller: Advanced Micro Devices [AMD] CS5536 [Geode companion] EHC (rev 02) There are no SMBus controllers listed. However, The datasheet[1] for the CS5536 notes there is an SMB controller within this chip. Details from the datasheet: "System Management Bus (SMB) Controller: — Compatible with Intel System Management Bus, Industry Standard Two-wire interface, and ACCESS.bus — Bus master and slave operation" --Tim [1] http://support.amd.com/us/Embedded_TechDocs/33238G_cs5536_db.pdf (Logical block layout on p.13, details on p.14) -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
