ENGR00060848 Add imx37 audio playback support

imx37 driver based on ASoC + Wolfson WM8350 AudioPlus support
http://opensource.wolfsonmicro.com/node/8

2 files changed, 170 insertions, 2 deletions

diff --git a/drivers/pmic/Makefile b/drivers/pmic/Makefile
index 9b556e115b45..cab9157a938a 100644
--- a/drivers/pmic/Makefile
+++ b/drivers/pmic/Makefile
@@ -3,11 +3,12 @@
 #
 
 ifeq ($(CONFIG_PMIC_DEBUG),y)
-	EXTRA_CFLAGS		+= -DDEBUG
+ EXTRA_CFLAGS  += -DDEBUG
 endif
 
 obj-$(CONFIG_PMIC) += pmic.o
 
 obj-$(CONFIG_PMIC_WM8350) += \
-	pmic-wm8350.o pmic-wm8350-bus.o
+ pmic-wm8350.o pmic-wm8350-bus.o pmic-wm8350-i2c.o
+
 
diff --git a/drivers/pmic/pmic-wm8350-i2c.c b/drivers/pmic/pmic-wm8350-i2c.c
new file mode 100644
index 000000000000..9851c159a38f
--- /dev/null
+++ b/drivers/pmic/pmic-wm8350-i2c.c
@@ -0,0 +1,167 @@
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/bitops.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+#include <linux/err.h>
+#include <linux/interrupt.h>
+#include <linux/irq.h>
+#include <linux/leds.h>
+#include <linux/fb.h>
+#include <linux/pmic.h>
+#include <linux/pmic/wm8350.h>
+
+#define WM8350_I2C_ADDR         (0x34 >> 1)
+
+extern void wm8350_free(struct wm8350 *wm8350);
+extern int wm8350_init(struct wm8350* wm8350);
+
+
+static int wm8350_i2c_detach(struct i2c_client *client);
+
+void wm8350_irq_work(struct work_struct *work)
+{
+	wm8350_irq_worker(work);
+}
+
+irqreturn_t wm8350_irq_handler(int irq, void *data)
+{
+	struct wm8350 *wm8350 = (struct wm8350*)data;
+	schedule_work(&wm8350->work);
+	return IRQ_HANDLED;
+}
+
+/*
+ * WM8350 2 wire address
+ */
+static unsigned short normal_i2c[] = { WM8350_I2C_ADDR, I2C_CLIENT_END };
+
+/* Magic definition of all other variables and things */
+I2C_CLIENT_INSMOD;
+
+static int wm8350_pmic_i2c_detect(struct i2c_adapter *adap, int addr, int kind)
+{
+	struct wm8350* wm8350;
+	struct i2c_client *i2c;
+	int ret = 0;
+
+	if (addr != WM8350_I2C_ADDR)
+		return -ENODEV;
+
+	i2c = kzalloc(sizeof(struct i2c_client), GFP_KERNEL);
+	if (i2c == NULL)
+		return -ENOMEM;
+
+	wm8350 = kzalloc(sizeof(struct wm8350), GFP_KERNEL);
+	if (wm8350 == NULL) {
+		kfree(i2c);
+		return -ENOMEM;
+	}
+
+	i2c->addr = addr;
+	i2c->adapter = adap;
+
+	mutex_init(&wm8350->work_mutex);
+	i2c_set_clientdata(i2c, wm8350);
+	wm8350->i2c_client = i2c;
+	wm8350_set_io(wm8350, WM8350_IO_I2C, NULL, NULL);
+
+	ret = i2c_attach_client(i2c);
+	if (ret < 0) {
+		printk(KERN_ERR "wm8350: failed to attach device at addr 0x%x\n", addr);
+		goto err;
+	}
+
+	ret = wm8350_create_cache(wm8350);
+	if (ret < 0) {
+		printk(KERN_ERR "wm8350: failed to create register cache\n");
+		goto err;
+	}
+
+	if (wm8350_reg_read(wm8350, 0) == 0x0)
+		printk("wm8350: found Rev C device\n");
+	else if (wm8350_reg_read(wm8350, 0) == 0x6143)
+		printk("wm8350: found Rev E device\n");
+	else {
+		printk(KERN_ERR "wm8350: device is not a WM8350\n");
+		ret = -ENODEV;
+		goto err;
+	}
+
+	ret = wm8350_init(wm8350);
+	if (ret == 0)
+		return ret;
+
+err:
+	wm8350_i2c_detach(i2c);
+	return ret;
+}
+
+static int wm8350_i2c_attach(struct i2c_adapter *adap)
+{
+	return i2c_probe(adap, &addr_data, wm8350_pmic_i2c_detect);
+}
+
+static int wm8350_i2c_detach(struct i2c_client *client)
+{
+	struct wm8350 *wm8350 = i2c_get_clientdata(client);
+
+	wm8350_free(wm8350);
+	i2c_detach_client(client);
+	kfree(client);
+	if (wm8350->reg_cache)
+		kfree(wm8350->reg_cache);
+	kfree(wm8350);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int wm8350_i2c_suspend(struct i2c_client *client, pm_message_t state)
+{
+	int ret = 0;
+	return ret;
+}
+
+static int wm8350_i2c_resume(struct i2c_client *client)
+{
+	int ret = 0;
+	return ret;
+}
+
+#else
+#define wm8350_i2c_suspend	NULL
+#define wm8350_i2c_resume	NULL
+#endif
+
+static struct i2c_driver wm8350_i2c_driver = {
+	.driver = {
+		.name = "WM8350",
+	},
+	.attach_adapter = wm8350_i2c_attach,
+	.detach_client =  wm8350_i2c_detach,
+	.suspend	= wm8350_i2c_suspend,
+	.resume		= wm8350_i2c_resume,
+	.command =        NULL,
+};
+
+
+static int __init wm8350_pmic_init(void)
+{
+	return i2c_add_driver(&wm8350_i2c_driver);
+}
+
+static void __exit wm8350_pmic_exit(void)
+{
+	i2c_del_driver(&wm8350_i2c_driver);
+}
+
+module_init(wm8350_pmic_init);
+module_exit(wm8350_pmic_exit);
+
+MODULE_AUTHOR("Liam Girdwood");
+MODULE_DESCRIPTION("PMIC WM8350 Driver");
+MODULE_LICENSE("GPL");
+