mfd: Add WM8326 support

The WM8326 is a high performance variant of the WM832x series with
no software visible differences.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/wm831x-core.c

@@ -1541,6 +1541,12 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
 		dev_info(wm831x->dev, "WM8325 revision %c\n", 'A' + rev);
 		break;
 
+	case WM8326:
+		parent = WM8326;
+		wm831x->num_gpio = 12;
+		dev_info(wm831x->dev, "WM8326 revision %c\n", 'A' + rev);
+		break;
+
 	default:
 		dev_err(wm831x->dev, "Unknown WM831x device %04x\n", ret);
 		ret = -EINVAL;
@@ -1612,6 +1618,7 @@ int wm831x_device_init(struct wm831x *wm831x, unsigned long id, int irq)
 	case WM8320:
 	case WM8321:
 	case WM8325:
+	case WM8326:
 		ret = mfd_add_devices(wm831x->dev, -1,
 				      wm8320_devs, ARRAY_SIZE(wm8320_devs),
 				      NULL, wm831x->irq_base);

drivers/mfd/wm831x-i2c.c

@@ -108,6 +108,7 @@ static const struct i2c_device_id wm831x_i2c_id[] = {
 	{ "wm8320", WM8320 },
 	{ "wm8321", WM8321 },
 	{ "wm8325", WM8325 },
+	{ "wm8326", WM8326 },
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, wm831x_i2c_id);

drivers/mfd/wm831x-spi.c

@@ -81,6 +81,8 @@ static int __devinit wm831x_spi_probe(struct spi_device *spi)
 		type = WM8321;
 	else if (strcmp(spi->modalias, "wm8325") == 0)
 		type = WM8325;
+	else if (strcmp(spi->modalias, "wm8326") == 0)
+		type = WM8326;
 	else {
 		dev_err(&spi->dev, "Unknown device type\n");
 		return -EINVAL;
@@ -184,6 +186,17 @@ static struct spi_driver wm8325_spi_driver = {
 	.suspend	= wm831x_spi_suspend,
 };
 
+static struct spi_driver wm8326_spi_driver = {
+	.driver = {
+		.name	= "wm8326",
+		.bus	= &spi_bus_type,
+		.owner	= THIS_MODULE,
+	},
+	.probe		= wm831x_spi_probe,
+	.remove		= __devexit_p(wm831x_spi_remove),
+	.suspend	= wm831x_spi_suspend,
+};
+
 static int __init wm831x_spi_init(void)
 {
 	int ret;
@@ -212,12 +225,17 @@ static int __init wm831x_spi_init(void)
 	if (ret != 0)
 		pr_err("Failed to register WM8325 SPI driver: %d\n", ret);
 
+	ret = spi_register_driver(&wm8326_spi_driver);
+	if (ret != 0)
+		pr_err("Failed to register WM8326 SPI driver: %d\n", ret);
+
 	return 0;
 }
 subsys_initcall(wm831x_spi_init);
 
 static void __exit wm831x_spi_exit(void)
 {
+	spi_unregister_driver(&wm8326_spi_driver);
 	spi_unregister_driver(&wm8325_spi_driver);
 	spi_unregister_driver(&wm8321_spi_driver);
 	spi_unregister_driver(&wm8320_spi_driver);

include/linux/mfd/wm831x/core.h

@@ -245,6 +245,7 @@ enum wm831x_parent {
 	WM8320 = 0x8320,
 	WM8321 = 0x8321,
 	WM8325 = 0x8325,
+	WM8326 = 0x8326,
 };
 
 struct wm831x {