[PATCH] nautilus poweroff

The power management unit on newer 1535D/D+ ALI bridges
(UP1100/UP1500) is quite different to 1543C one on UP1000.
Even though it has the same PCI id and revision number...

This makes poweroff(8) work on UP1100 and UP1500.

Ivan.

arch/alpha/kernel/sys_nautilus.c

@@ -78,6 +78,8 @@ void
 nautilus_kill_arch(int mode)
 {
 	struct pci_bus *bus = pci_isa_hose->bus;
+	u32 pmuport;
+	int off;
 
 	switch (mode) {
 	case LINUX_REBOOT_CMD_RESTART:
@@ -92,14 +94,18 @@ nautilus_kill_arch(int mode)
 		break;
 
 	case LINUX_REBOOT_CMD_POWER_OFF:
-		{
-			u32 pmuport;
-			pci_bus_read_config_dword(bus, 0x88, 0x10, &pmuport);
-			pmuport &= 0xfffe;
-			outl(0xffff, pmuport); /* clear pending events */
-			outw(0x2000, pmuport+4); /* power off */
-			/* NOTREACHED */
+		/* Assume M1543C */
+		off = 0x2000;		/* SLP_TYPE = 0, SLP_EN = 1 */
+		pci_bus_read_config_dword(bus, 0x88, 0x10, &pmuport);
+		if (!pmuport) {
+			/* M1535D/D+ */
+			off = 0x3400;	/* SLP_TYPE = 5, SLP_EN = 1 */
+			pci_bus_read_config_dword(bus, 0x88, 0xe0, &pmuport);
 		}
+		pmuport &= 0xfffe;
+		outw(0xffff, pmuport);	/* Clear pending events. */
+		outw(off, pmuport + 4);
+		/* NOTREACHED */
 		break;
 	}
 }