On Wed, Sep 05, 2012 at 05:06:04PM +0530, Sourav Poddar wrote:

+static struct regmap_config smsc_regmap_config = {
+		.reg_bits = 8,
+		.val_bits = 8,
+		.max_register = SMSC_MAX_REGISTER - 1;

That max_register setup looks very odd...

+		.cache_type = REGCACHE_COMPRESSED,
+};

Are you sure the compressed type is sensible?  It would normally only
make sense with a large number of closely packed registers but this
device has 8 bit register values.

+#ifdef CONFIG_OF
+	of_property_read_u32(node, "clock", &smsc->clk);
+#endif

+	ret = regmap_write(smsc->regmap, SMSC_CLK_CTRL, smsc->clk);
+	if (ret)
+		goto err;

What happens on non-DT systems?

+static int smsc_i2c_remove(struct i2c_client *i2c)
+{
+	return 0;
+}

Remove empty functions, though it's rather surprising that there's
nothing at all to do here..  Normally an MFD would at least remove its
children.