Hi,
The p4b_smbus.c module located in lm_sensors-2.7.0/prog/hotplug does not
work for 2.5. kernels. Also, the code can be simplified much if enabling the
SMBus device is done as a "pci quirk" in drivers/pci/quirks.c in the linux
kernel sources. A patch for linux-kernel 2.5.59 is attached below. However,
it _might_ be wise to add a check so that only Asus mainboards are affected.
Dominik
diff -ruN linux-original/drivers/pci/quirks.c linux/drivers/pci/quirks.c
--- linux-original/drivers/pci/quirks.c 2003-02-01 17:33:43.000000000 +0100
+++ linux/drivers/pci/quirks.c 2003-02-02 11:50:12.000000000 +0100
@@ -535,6 +535,21 @@
}
}
+static void __devinit quirk_p4b_smbus(struct pci_dev *dev)
+{
+ u16 val;
+ pci_read_config_word(dev, 0xF2, &val);
+ if (val & 0x8) {
+ pci_write_config_word(dev, 0xF2, val & (~0x8));
+ pci_read_config_word(dev, 0xF2, &val);
+ if(val & 0x8)
+ printk(KERN_INFO "PCI: Fixup to enable i801 SMBus device failed - 0x%x", val);
+ else
+ printk(KERN_INFO "PCI: Fixup to enable i801 SMBus successful! - 0x%x\n", val);
+ }
+ return;
+}
+
/*
* The main table of quirks.
*/
@@ -604,6 +619,12 @@
{ PCI_FIXUP_FINAL, PCI_VENDOR_ID_CYRIX, PCI_DEVICE_ID_CYRIX_PCI_MASTER, quirk_mediagx_master },
+ /*
+ * on Asus P4B boards, the i801SMBus device is disabled.
+ */
+ { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801BA_0, quirk_p4b_smbus },
+ { PCI_FIXUP_HEADER, PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_82801DB_0, quirk_p4b_smbus },
+
{ 0 }
};
