X60: enable Cx power saving modes

Change-Id: Ib03d9aa77050edde2538b80b32158cb3f0610be6
Signed-off-by: Sven Schnelle <svens@stackframe.org>
Reviewed-on: http://review.coreboot.org/331
Tested-by: build bot (Jenkins)

src/mainboard/lenovo/x60/Kconfig

@@ -11,6 +11,7 @@ config BOARD_SPECIFIC_OPTIONS # dummy
 	select SUPERIO_NSC_PC87392
 	select EC_LENOVO_PMH7
 	select EC_LENOVO_H8
+	select DRIVERS_ICS_954309
 	select BOARD_HAS_FADT
 	select HAVE_OPTION_TABLE
 	select HAVE_PIRQ_TABLE

src/mainboard/lenovo/x60/devicetree.cb

@@ -60,6 +60,8 @@ chip northbridge/intel/i945
 
 			register "gpe0_en" = "0x11000006"
 			register "alt_gp_smi_en" = "0x1000"
+
+			register "c4onc3_enable" = "1"
 			device pci 1b.0 on # Audio Cnotroller
 				subsystemid 0x17aa 0x2010
 			end
@@ -174,6 +176,22 @@ chip northbridge/intel/i945
 			end
 			device pci 1f.3 on # SMBUS
 				subsystemid 0x17aa 0x200f
+				chip drivers/ics/954309
+					register "reg0" = "0x2e"
+					register "reg1" = "0xf7"
+					register "reg2" = "0x3c"
+					register "reg3" = "0x20"
+					register "reg4" = "0x01"
+					register "reg5" = "0x00"
+					register "reg6" = "0x1b"
+					register "reg7" = "0x01"
+					register "reg8" = "0x54"
+					register "reg9" = "0xff"
+					register "reg10" = "0xff"
+					register "reg11" = "0x07"
+					device i2c 69 on end
+				end
+
 			end
 		end
 		chip southbridge/ricoh/rl5c476

src/mainboard/lenovo/x60/mainboard.c

@@ -36,6 +36,19 @@
 #include <northbridge/intel/i945/i945.h>
 #include <pc80/mc146818rtc.h>
 #include "dock.h"
+#include <arch/x86/include/arch/acpigen.h>
+
+static struct cst_entry cst_entries[] = {
+	{ 0x7f, 1, 2, 0, 1, 1, 1, 1000 },
+	{ 0x01, 8, 0, 0, DEFAULT_PMBASE + LV2, 2, 1, 500 },
+	{ 0x01, 8, 0, 0, DEFAULT_PMBASE + LV3, 2, 17, 250 },
+};
+
+int get_cst_entries(struct cst_entry **entries)
+{
+	*entries = cst_entries;
+	return ARRAY_SIZE(cst_entries);
+}
 
 static void mainboard_enable(device_t dev)
 {