i2c mux support

git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1809 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/drivers/i2c/lm63/lm63.c

@@ -0,0 +1,46 @@
+#include <console/console.h>
+#include <device/device.h>
+#include <device/smbus.h>
+#include <device/pci.h>
+#include <device/pci_ids.h>
+#include <device/pci_ops.h>
+#include <cpu/x86/msr.h>
+#include "chip.h"
+
+
+static void lm63_init(device_t dev)
+{
+	int result;
+	if (dev->enabled && dev->path.type == DEVICE_PATH_I2C)
+	{
+		if(ops_smbus_bus(get_pbus_smbus(dev))) {
+			if( dev->bus->dev->path.type == DEVICE_PATH_I2C) smbus_set_link(dev); // it is under mux 
+			result = smbus_read_byte(dev, 0x03);
+//			result &= ~0x04;
+			result |= 0x04;
+			smbus_write_byte(dev, 0x03, result & 0xff); // config lm63
+		}
+		
+	}
+
+}
+static void lm63_noop(device_t dummy)
+{
+}
+
+static struct device_operations lm63_operations = {
+        .read_resources   = lm63_noop,
+        .set_resources    = lm63_noop,
+        .enable_resources = lm63_noop,
+        .init             = lm63_init,
+};
+
+static void enable_dev(struct device *dev)
+{
+	dev->ops = &lm63_operations;
+}
+
+struct chip_operations drivers_i2c_lm63_ops = {
+	CHIP_NAME("lm63")
+	.enable_dev = enable_dev, 
+};