ACPI: EC: Remove unused variables and duplicated code

Signed-off-by: Alexey Y. Starikovskiy <alexey.y.starikovskiy@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 253 insertions, 458 deletions

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index b6f935d0c3a..c816b4eab50 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -45,203 +45,162 @@ ACPI_MODULE_NAME("acpi_ec")
 #define ACPI_EC_DRIVER_NAME		"ACPI Embedded Controller Driver"
 #define ACPI_EC_DEVICE_NAME		"Embedded Controller"
 #define ACPI_EC_FILE_INFO		"info"
+
+/* EC status register */
 #define ACPI_EC_FLAG_OBF	0x01	/* Output buffer full */
 #define ACPI_EC_FLAG_IBF	0x02	/* Input buffer full */
 #define ACPI_EC_FLAG_BURST	0x10	/* burst mode */
 #define ACPI_EC_FLAG_SCI	0x20	/* EC-SCI occurred */
-#define ACPI_EC_EVENT_OBF	0x01	/* Output buffer full */
-#define ACPI_EC_EVENT_IBE	0x02	/* Input buffer empty */
-#define ACPI_EC_DELAY		50	/* Wait 50ms max. during EC ops */
-#define ACPI_EC_UDELAY_GLK	1000	/* Wait 1ms max. to get global lock */
-#define ACPI_EC_UDELAY         100	/* Poll @ 100us increments */
-#define ACPI_EC_UDELAY_COUNT   1000	/* Wait 10ms max. during EC ops */
+
+/* EC commands */
 #define ACPI_EC_COMMAND_READ	0x80
 #define ACPI_EC_COMMAND_WRITE	0x81
 #define ACPI_EC_BURST_ENABLE	0x82
 #define ACPI_EC_BURST_DISABLE	0x83
 #define ACPI_EC_COMMAND_QUERY	0x84
-#define EC_POLL			0xFF
-#define EC_INTR			0x00
+
+/* EC events */
+enum {
+	ACPI_EC_EVENT_OBF_1 = 1,	/* Output buffer full */
+	ACPI_EC_EVENT_IBF_0,		/* Input buffer empty */
+};
+
+#define ACPI_EC_DELAY		50	/* Wait 50ms max. during EC ops */
+#define ACPI_EC_UDELAY_GLK	1000	/* Wait 1ms max. to get global lock */
+#define ACPI_EC_UDELAY         100	/* Poll @ 100us increments */
+#define ACPI_EC_UDELAY_COUNT   1000	/* Wait 10ms max. during EC ops */
+
+enum {
+	EC_INTR = 1,	/* Output buffer full */
+	EC_POLL,		/* Input buffer empty */
+};
+
 static int acpi_ec_remove(struct acpi_device *device, int type);
 static int acpi_ec_start(struct acpi_device *device);
 static int acpi_ec_stop(struct acpi_device *device, int type);
-static int acpi_ec_intr_add(struct acpi_device *device);
-static int acpi_ec_poll_add(struct acpi_device *device);
+static int acpi_ec_add(struct acpi_device *device);
 
 static struct acpi_driver acpi_ec_driver = {
 	.name = ACPI_EC_DRIVER_NAME,
 	.class = ACPI_EC_CLASS,
 	.ids = ACPI_EC_HID,
 	.ops = {
-		.add = acpi_ec_intr_add,
+		.add = acpi_ec_add,
 		.remove = acpi_ec_remove,
 		.start = acpi_ec_start,
 		.stop = acpi_ec_stop,
 		},
 };
-union acpi_ec {
-	struct {
-		u32 mode;
-		acpi_handle handle;
-		unsigned long uid;
-		unsigned long gpe_bit;
-		struct acpi_generic_address status_addr;
-		struct acpi_generic_address command_addr;
-		struct acpi_generic_address data_addr;
-		unsigned long global_lock;
-	} common;
-
-	struct {
-		u32 mode;
-		acpi_handle handle;
-		unsigned long uid;
-		unsigned long gpe_bit;
-		struct acpi_generic_address status_addr;
-		struct acpi_generic_address command_addr;
-		struct acpi_generic_address data_addr;
-		unsigned long global_lock;
-		u8 expect_event;
-		atomic_t leaving_burst;	/* 0 : No, 1 : Yes, 2: abort */
-		atomic_t pending_gpe;
-		struct semaphore sem;
-		wait_queue_head_t wait;
-	} intr;
-
-	struct {
-		u32 mode;
-		acpi_handle handle;
-		unsigned long uid;
-		unsigned long gpe_bit;
-		struct acpi_generic_address status_addr;
-		struct acpi_generic_address command_addr;
-		struct acpi_generic_address data_addr;
-		unsigned long global_lock;
-		struct semaphore sem;
-	} poll;
+struct acpi_ec {
+	acpi_handle handle;
+	unsigned long uid;
+	unsigned long gpe_bit;
+	struct acpi_generic_address status_addr;
+	struct acpi_generic_address command_addr;
+	struct acpi_generic_address data_addr;
+	unsigned long global_lock;
+	struct semaphore sem;
+	unsigned int expect_event;
+	atomic_t leaving_burst;	/* 0 : No, 1 : Yes, 2: abort */
+	wait_queue_head_t wait;
 };
 
-static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event);
-static int acpi_ec_intr_wait(union acpi_ec *ec, u8 event);
-static int acpi_ec_poll_transaction(union acpi_ec *ec, u8 command,
+/* If we find an EC via the ECDT, we need to keep a ptr to its context */
+static struct acpi_ec *ec_ecdt;
+
+/* External interfaces use first EC only, so remember */
+static struct acpi_device *first_ec;
+static int acpi_ec_mode = EC_INTR;
+
+static int acpi_ec_poll_transaction(struct acpi_ec *ec, u8 command,
                                     const u8 *wdata, unsigned wdata_len,
                                     u8 *rdata, unsigned rdata_len);
-static int acpi_ec_intr_transaction(union acpi_ec *ec, u8 command,
+static int acpi_ec_intr_transaction(struct acpi_ec *ec, u8 command,
                                     const u8 *wdata, unsigned wdata_len,
                                     u8 *rdata, unsigned rdata_len);
 static void acpi_ec_gpe_poll_query(void *ec_cxt);
 static void acpi_ec_gpe_intr_query(void *ec_cxt);
 static u32 acpi_ec_gpe_poll_handler(void *data);
 static u32 acpi_ec_gpe_intr_handler(void *data);
-static acpi_status __init
-acpi_fake_ecdt_poll_callback(acpi_handle handle,
-				u32 Level, void *context, void **retval);
-
-static acpi_status __init
-acpi_fake_ecdt_intr_callback(acpi_handle handle,
-			      u32 Level, void *context, void **retval);
-
-static int __init acpi_ec_poll_get_real_ecdt(void);
-static int __init acpi_ec_intr_get_real_ecdt(void);
-/* If we find an EC via the ECDT, we need to keep a ptr to its context */
-static union acpi_ec *ec_ecdt;
-
-/* External interfaces use first EC only, so remember */
-static struct acpi_device *first_ec;
-static int acpi_ec_poll_mode = EC_INTR;
 
 /* --------------------------------------------------------------------------
                              Transaction Management
    -------------------------------------------------------------------------- */
 
-static u32 acpi_ec_read_status(union acpi_ec *ec)
+static u32 acpi_ec_read_status(struct acpi_ec *ec)
 {
 	u32 status = 0;
 
-	acpi_hw_low_level_read(8, &status, &ec->common.status_addr);
+	acpi_hw_low_level_read(8, &status, &ec->status_addr);
 	return status;
 }
 
-static int acpi_ec_check_status(u32 status, u8 event) {
-
-	switch (event) {
-	case ACPI_EC_EVENT_OBF:
-		if (status & ACPI_EC_FLAG_OBF)
-			return 1;
-	case ACPI_EC_EVENT_IBE:
-		if (!(status & ACPI_EC_FLAG_IBF))
-			return 1;
-	default:
-		break;
-	}
+static u32 acpi_ec_read_data(struct acpi_ec *ec)
+{
+	u32 data = 0;
 
-	return 0;
+	acpi_hw_low_level_read(8, &data, &ec->data_addr);
+	return data;
 }
 
-static int acpi_ec_wait(union acpi_ec *ec, u8 event)
+static void acpi_ec_write_cmd(struct acpi_ec *ec, u32 command)
 {
-	if (acpi_ec_poll_mode)
-		return acpi_ec_poll_wait(ec, event);
-	else
-		return acpi_ec_intr_wait(ec, event);
+	acpi_hw_low_level_write(8, command, &ec->command_addr);
 }
 
-static int acpi_ec_poll_wait(union acpi_ec *ec, u8 event)
+static void acpi_ec_write_data(struct acpi_ec *ec, u32 data)
 {
-	u32 acpi_ec_status = 0;
-	u32 i = ACPI_EC_UDELAY_COUNT;
+	acpi_hw_low_level_write(8, data, &ec->data_addr);
+}
 
-	if (!ec)
-		return -EINVAL;
+static int acpi_ec_check_status(u32 status, u8 event) {
 
-	/* Poll the EC status register waiting for the event to occur. */
 	switch (event) {
-	case ACPI_EC_EVENT_OBF:
-		do {
-			acpi_hw_low_level_read(8, &acpi_ec_status,
-					       &ec->common.status_addr);
-			if (acpi_ec_status & ACPI_EC_FLAG_OBF)
-				return 0;
-			udelay(ACPI_EC_UDELAY);
-		} while (--i > 0);
+	case ACPI_EC_EVENT_OBF_1:
+		if (status & ACPI_EC_FLAG_OBF)
+			return 1;
 		break;
-	case ACPI_EC_EVENT_IBE:
-		do {
-			acpi_hw_low_level_read(8, &acpi_ec_status,
-					       &ec->common.status_addr);
-			if (!(acpi_ec_status & ACPI_EC_FLAG_IBF))
-				return 0;
-			udelay(ACPI_EC_UDELAY);
-		} while (--i > 0);
+	case ACPI_EC_EVENT_IBF_0:
+		if (!(status & ACPI_EC_FLAG_IBF))
+			return 1;
 		break;
 	default:
-		return -EINVAL;
+		break;
 	}
 
-	return -ETIME;
+	return 0;
 }
 
-static int acpi_ec_intr_wait(union acpi_ec *ec, u8 event)
+static int acpi_ec_wait(struct acpi_ec *ec, u8 event)
 {
-	long		time_left;
-
-	ec->intr.expect_event = event;
+	int i = (acpi_ec_mode == EC_POLL) ? ACPI_EC_UDELAY_COUNT : 0;
+	long time_left;
 
+	ec->expect_event = event;
 	if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
-			ec->intr.expect_event = 0;
-			return 0;
+		ec->expect_event = 0;
+		return 0;
 	}
 
-	time_left = wait_event_timeout(ec->intr.wait, !ec->intr.expect_event,
-					msecs_to_jiffies(ACPI_EC_DELAY));
-
-	ec->intr.expect_event = 0;
-	if (time_left <= 0) {
-		if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
+	do {
+		if (acpi_ec_mode == EC_POLL) {
+			udelay(ACPI_EC_UDELAY);
+		} else {
+			time_left = wait_event_timeout(ec->wait,
+				    !ec->expect_event,
+				    msecs_to_jiffies(ACPI_EC_DELAY));
+			if (time_left > 0) {
+				ec->expect_event = 0;
 				return 0;
+			}
 		}
-	} else {
-		return 0;
-	}
+		if (acpi_ec_check_status(acpi_ec_read_status(ec), event)) {
+			ec->expect_event = 0;
+			return 0;
+		}
+	} while (--i > 0);
+
+	ec->expect_event = 0;
 
 	return -ETIME;
 }
@@ -251,64 +210,63 @@ static int acpi_ec_intr_wait(union acpi_ec *ec, u8 event)
  * Note: samsung nv5000 doesn't work with ec burst mode.
  * http://bugzilla.kernel.org/show_bug.cgi?id=4980
  */
-int acpi_ec_enter_burst_mode(union acpi_ec *ec)
+int acpi_ec_enter_burst_mode(struct acpi_ec *ec)
 {
 	u32 tmp = 0;
-	int status = 0;
+	u32 status = 0;
 
 
 	status = acpi_ec_read_status(ec);
 	if (status != -EINVAL && !(status & ACPI_EC_FLAG_BURST)) {
-		status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+		status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
 		if (status)
 			goto end;
-		acpi_hw_low_level_write(8, ACPI_EC_BURST_ENABLE,
-					&ec->common.command_addr);
-		status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
-		acpi_hw_low_level_read(8, &tmp, &ec->common.data_addr);
+		acpi_ec_write_cmd(ec, ACPI_EC_BURST_ENABLE);
+		status = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
+		tmp = acpi_ec_read_data(ec);
 		if (tmp != 0x90) {	/* Burst ACK byte */
 			return -EINVAL;
 		}
 	}
 
-	atomic_set(&ec->intr.leaving_burst, 0);
+	atomic_set(&ec->leaving_burst, 0);
 	return 0;
-      end:
-	ACPI_EXCEPTION ((AE_INFO, status, "EC wait, burst mode");
+  end:
+	ACPI_EXCEPTION((AE_INFO, status, "EC wait, burst mode"));
 	return -1;
 }
 
-int acpi_ec_leave_burst_mode(union acpi_ec *ec)
+int acpi_ec_leave_burst_mode(struct acpi_ec *ec)
 {
-	int status = 0;
+	u32 status = 0;
 
 
 	status = acpi_ec_read_status(ec);
 	if (status != -EINVAL && (status & ACPI_EC_FLAG_BURST)){
-		status = acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
+		status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
 		if(status)
 			goto end;
-		acpi_hw_low_level_write(8, ACPI_EC_BURST_DISABLE, &ec->common.command_addr);
-		acpi_ec_wait(ec, ACPI_EC_FLAG_IBF);
+		acpi_ec_write_cmd(ec, ACPI_EC_BURST_DISABLE);
+		acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
 	}
-	atomic_set(&ec->intr.leaving_burst, 1);
+	atomic_set(&ec->leaving_burst, 1);
 	return 0;
-end:
-	ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode");
+  end:
+	ACPI_EXCEPTION((AE_INFO, status, "EC leave burst mode"));
 	return -1;
 }
 #endif /* ACPI_FUTURE_USAGE */
 
-static int acpi_ec_transaction(union acpi_ec *ec, u8 command,
+static int acpi_ec_transaction(struct acpi_ec *ec, u8 command,
                                const u8 *wdata, unsigned wdata_len,
                                u8 *rdata, unsigned rdata_len)
 {
-	if (acpi_ec_poll_mode)
+	if (acpi_ec_mode == EC_POLL)
 		return acpi_ec_poll_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
 	else
 		return acpi_ec_intr_transaction(ec, command, wdata, wdata_len, rdata, rdata_len);
 }
-static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data)
+static int acpi_ec_read(struct acpi_ec *ec, u8 address, u32 * data)
 {
         int result;
         u8 d;
@@ -316,30 +274,30 @@ static int acpi_ec_read(union acpi_ec *ec, u8 address, u32 * data)
         *data = d;
         return result;
 }
-static int acpi_ec_write(union acpi_ec *ec, u8 address, u8 data)
+static int acpi_ec_write(struct acpi_ec *ec, u8 address, u8 data)
 {
         u8 wdata[2] = { address, data };
         return acpi_ec_transaction(ec, ACPI_EC_COMMAND_WRITE, wdata, 2, NULL, 0);
 }
 
-static int acpi_ec_transaction_unlocked(union acpi_ec *ec, u8 command,
-                                             const u8 *wdata, unsigned wdata_len,
-                                             u8 *rdata, unsigned rdata_len)
+static int acpi_ec_transaction_unlocked(struct acpi_ec *ec, u8 command,
+                                        const u8 *wdata, unsigned wdata_len,
+                                        u8 *rdata, unsigned rdata_len)
 {
 	int result;
 
-	acpi_hw_low_level_write(8, command, &ec->common.command_addr);
+	acpi_ec_write_cmd(ec, command);
 
 	for (; wdata_len > 0; wdata_len --) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
 		if (result)
 			return result;
 
-		acpi_hw_low_level_write(8, *(wdata++), &ec->common.data_addr);
+		acpi_ec_write_data(ec, *(wdata++));
         }
 
 	if (command == ACPI_EC_COMMAND_WRITE) {
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
 		if (result)
 			return result;
 	}
@@ -347,18 +305,18 @@ static int acpi_ec_transaction_unlocked(union acpi_ec *ec, u8 command,
 	for (; rdata_len > 0; rdata_len --) {
 		u32 d;
 
-		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF);
+		result = acpi_ec_wait(ec, ACPI_EC_EVENT_OBF_1);
 		if (result)
 			return result;
 
-		acpi_hw_low_level_read(8, &d, &ec->common.data_addr);
+		d = acpi_ec_read_data(ec);
 		*(rdata++) = (u8) d;
 	}
 
 	return 0;
 }
 
-static int acpi_ec_poll_transaction(union acpi_ec *ec, u8 command,
+static int acpi_ec_poll_transaction(struct acpi_ec *ec, u8 command,
                                     const u8 *wdata, unsigned wdata_len,
                                     u8 *rdata, unsigned rdata_len)
 {
@@ -372,13 +330,13 @@ static int acpi_ec_poll_transaction(union acpi_ec *ec, u8 command,
         if (rdata)
                 memset(rdata, 0, rdata_len);
 
-	if (ec->common.global_lock) {
+	if (ec->global_lock) {
 		status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
 		if (ACPI_FAILURE(status))
 			return -ENODEV;
         }
 
-	if (down_interruptible(&ec->poll.sem)) {
+	if (down_interruptible(&ec->sem)) {
 		result = -ERESTARTSYS;
 		goto end_nosem;
 	}
@@ -386,16 +344,16 @@ static int acpi_ec_poll_transaction(union acpi_ec *ec, u8 command,
         result = acpi_ec_transaction_unlocked(ec, command,
                                               wdata, wdata_len,
                                               rdata, rdata_len);
-	up(&ec->poll.sem);
+	up(&ec->sem);
 
 end_nosem:
-	if (ec->common.global_lock)
+	if (ec->global_lock)
 		acpi_release_global_lock(glk);
 
 	return result;
 }
 
-static int acpi_ec_intr_transaction(union acpi_ec *ec, u8 command,
+static int acpi_ec_intr_transaction(struct acpi_ec *ec, u8 command,
                                     const u8 *wdata, unsigned wdata_len,
                                     u8 *rdata, unsigned rdata_len)
 {
@@ -408,18 +366,18 @@ static int acpi_ec_intr_transaction(union acpi_ec *ec, u8 command,
         if (rdata)
                 memset(rdata, 0, rdata_len);
 
-	if (ec->common.global_lock) {
+	if (ec->global_lock) {
 		status = acpi_acquire_global_lock(ACPI_EC_UDELAY_GLK, &glk);
 		if (ACPI_FAILURE(status))
 			return -ENODEV;
 	}
 
 	WARN_ON(in_interrupt());
-	down(&ec->intr.sem);
+	down(&ec->sem);
 
-	status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBE);
+	status = acpi_ec_wait(ec, ACPI_EC_EVENT_IBF_0);
 	if (status) {
-		printk(KERN_DEBUG PREFIX "read EC, IB not empty\n");
+		ACPI_EXCEPTION((AE_INFO, status, "read EC, IB not empty"));
 		goto end;
 	}
 
@@ -428,9 +386,9 @@ static int acpi_ec_intr_transaction(union acpi_ec *ec, u8 command,
                                               rdata, rdata_len);
 
 end:
-	up(&ec->intr.sem);
+	up(&ec->sem);
 
-	if (ec->common.global_lock)
+	if (ec->global_lock)
 		acpi_release_global_lock(glk);
 
 	return status;
@@ -441,7 +399,7 @@ end:
  */
 int ec_read(u8 addr, u8 * val)
 {
-	union acpi_ec *ec;
+	struct acpi_ec *ec;
 	int err;
 	u32 temp_data;
 
@@ -463,7 +421,7 @@ EXPORT_SYMBOL(ec_read);
 
 int ec_write(u8 addr, u8 val)
 {
-	union acpi_ec *ec;
+	struct acpi_ec *ec;
 	int err;
 
 	if (!first_ec)
@@ -482,7 +440,7 @@ extern int ec_transaction(u8 command,
                           const u8 *wdata, unsigned wdata_len,
                           u8 *rdata, unsigned rdata_len)
 {
-	union acpi_ec *ec;
+	struct acpi_ec *ec;
 
 	if (!first_ec)
 		return -ENODEV;
@@ -494,7 +452,7 @@ extern int ec_transaction(u8 command,
 
 EXPORT_SYMBOL(ec_transaction);
 
-static int acpi_ec_query(union acpi_ec *ec, u32 * data) {
+static int acpi_ec_query(struct acpi_ec *ec, u32 * data) {
         int result;
         u8 d;
 
@@ -529,7 +487,7 @@ union acpi_ec_query_data {
 
 static void acpi_ec_gpe_query(void *ec_cxt)
 {
-	if (acpi_ec_poll_mode)
+	if (acpi_ec_mode == EC_POLL)
 		acpi_ec_gpe_poll_query(ec_cxt);
 	else
 		acpi_ec_gpe_intr_query(ec_cxt);
@@ -537,7 +495,7 @@ static void acpi_ec_gpe_query(void *ec_cxt)
 
 static void acpi_ec_gpe_poll_query(void *ec_cxt)
 {
-	union acpi_ec *ec = (union acpi_ec *)ec_cxt;
+	struct acpi_ec *ec = (struct acpi_ec *)ec_cxt;
 	u32 value = 0;
 	static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
 	const char hex[] = { '0', '1', '2', '3', '4', '5', '6', '7',
@@ -548,11 +506,11 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt)
 	if (!ec_cxt)
 		goto end;
 
-	if (down_interruptible (&ec->poll.sem)) {
+	if (down_interruptible (&ec->sem)) {
 		return;
 	}
-	acpi_hw_low_level_read(8, &value, &ec->common.command_addr);
-	up(&ec->poll.sem);
+	value = acpi_ec_read_status(ec);
+	up(&ec->sem);
 
 	/* TBD: Implement asynch events!
 	 * NOTE: All we care about are EC-SCI's.  Other EC events are
@@ -571,14 +529,14 @@ static void acpi_ec_gpe_poll_query(void *ec_cxt)
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
 
-	acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
+	acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
 
       end:
-	acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+	acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
 }
 static void acpi_ec_gpe_intr_query(void *ec_cxt)
 {
-	union acpi_ec *ec = (union acpi_ec *)ec_cxt;
+	struct acpi_ec *ec = (struct acpi_ec *)ec_cxt;
 	u32 value;
 	int result = -ENODATA;
 	static char object_name[5] = { '_', 'Q', '0', '0', '\0' };
@@ -598,15 +556,14 @@ static void acpi_ec_gpe_intr_query(void *ec_cxt)
 
 	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Evaluating %s\n", object_name));
 
-	acpi_evaluate_object(ec->common.handle, object_name, NULL, NULL);
+	acpi_evaluate_object(ec->handle, object_name, NULL, NULL);
       end:
-	atomic_dec(&ec->intr.pending_gpe);
 	return;
 }
 
 static u32 acpi_ec_gpe_handler(void *data)
 {
-	if (acpi_ec_poll_mode)
+	if (acpi_ec_mode == EC_POLL)
 		return acpi_ec_gpe_poll_handler(data);
 	else
 		return acpi_ec_gpe_intr_handler(data);
@@ -614,12 +571,12 @@ static u32 acpi_ec_gpe_handler(void *data)
 static u32 acpi_ec_gpe_poll_handler(void *data)
 {
 	acpi_status status = AE_OK;
-	union acpi_ec *ec = (union acpi_ec *)data;
+	struct acpi_ec *ec = (struct acpi_ec *)data;
 
 	if (!ec)
 		return ACPI_INTERRUPT_NOT_HANDLED;
 
-	acpi_disable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
+	acpi_disable_gpe(NULL, ec->gpe_bit, ACPI_ISR);
 
 	status = acpi_os_execute(OSL_EC_POLL_HANDLER, acpi_ec_gpe_query, ec);
 
@@ -632,39 +589,38 @@ static u32 acpi_ec_gpe_intr_handler(void *data)
 {
 	acpi_status status = AE_OK;
 	u32 value;
-	union acpi_ec *ec = (union acpi_ec *)data;
+	struct acpi_ec *ec = (struct acpi_ec *)data;
 
 	if (!ec)
 		return ACPI_INTERRUPT_NOT_HANDLED;
 
-	acpi_clear_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
+	acpi_clear_gpe(NULL, ec->gpe_bit, ACPI_ISR);
 	value = acpi_ec_read_status(ec);
 
-	switch (ec->intr.expect_event) {
-	case ACPI_EC_EVENT_OBF:
+	switch (ec->expect_event) {
+	case ACPI_EC_EVENT_OBF_1:
 		if (!(value & ACPI_EC_FLAG_OBF))
 			break;
-		ec->intr.expect_event = 0;
-		wake_up(&ec->intr.wait);
+		ec->expect_event = 0;
+		wake_up(&ec->wait);
 		break;
-	case ACPI_EC_EVENT_IBE:
+	case ACPI_EC_EVENT_IBF_0:
 		if ((value & ACPI_EC_FLAG_IBF))
 			break;
-		ec->intr.expect_event = 0;
-		wake_up(&ec->intr.wait);
+		ec->expect_event = 0;
+		wake_up(&ec->wait);
 		break;
 	default:
 		break;
 	}
 
 	if (value & ACPI_EC_FLAG_SCI) {
-		atomic_add(1, &ec->intr.pending_gpe);
 		status = acpi_os_execute(OSL_EC_BURST_HANDLER,
 						     acpi_ec_gpe_query, ec);
 		return status == AE_OK ?
 		    ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
 	}
-	acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_ISR);
+	acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_ISR);
 	return status == AE_OK ?
 	    ACPI_INTERRUPT_HANDLED : ACPI_INTERRUPT_NOT_HANDLED;
 }
@@ -695,7 +651,7 @@ acpi_ec_space_handler(u32 function,
 		      void *handler_context, void *region_context)
 {
 	int result = 0;
-	union acpi_ec *ec = NULL;
+	struct acpi_ec *ec = NULL;
 	u64 temp = *value;
 	acpi_integer f_v = 0;
 	int i = 0;
@@ -705,12 +661,10 @@ acpi_ec_space_handler(u32 function,
 		return AE_BAD_PARAMETER;
 
 	if (bit_width != 8 && acpi_strict) {
-		printk(KERN_WARNING PREFIX
-		       "acpi_ec_space_handler: bit_width should be 8\n");
 		return AE_BAD_PARAMETER;
 	}
 
-	ec = (union acpi_ec *)handler_context;
+	ec = (struct acpi_ec *)handler_context;
 
       next_byte:
 	switch (function) {
@@ -767,20 +721,20 @@ static struct proc_dir_entry *acpi_ec_dir;
 
 static int acpi_ec_read_info(struct seq_file *seq, void *offset)
 {
-	union acpi_ec *ec = (union acpi_ec *)seq->private;
+	struct acpi_ec *ec = (struct acpi_ec *)seq->private;
 
 
 	if (!ec)
 		goto end;
 
 	seq_printf(seq, "gpe bit:                 0x%02x\n",
-		   (u32) ec->common.gpe_bit);
+		   (u32) ec->gpe_bit);
 	seq_printf(seq, "ports:                   0x%02x, 0x%02x\n",
-		   (u32) ec->common.status_addr.address,
-		   (u32) ec->common.data_addr.address);
+		   (u32) ec->status_addr.address,
+		   (u32) ec->data_addr.address);
 	seq_printf(seq, "use global lock:         %s\n",
-		   ec->common.global_lock ? "yes" : "no");
-	acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+		   ec->global_lock ? "yes" : "no");
+	acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
 
       end:
 	return 0;
@@ -791,7 +745,7 @@ static int acpi_ec_info_open_fs(struct inode *inode, struct file *file)
 	return single_open(file, acpi_ec_read_info, PDE(inode)->data);
 }
 
-static const struct file_operations acpi_ec_info_ops = {
+static struct file_operations acpi_ec_info_ops = {
 	.open = acpi_ec_info_open_fs,
 	.read = seq_read,
 	.llseek = seq_lseek,
@@ -840,101 +794,35 @@ static int acpi_ec_remove_fs(struct acpi_device *device)
                                Driver Interface
    -------------------------------------------------------------------------- */
 
-static int acpi_ec_poll_add(struct acpi_device *device)
+static int acpi_ec_add(struct acpi_device *device)
 {
 	int result = 0;
 	acpi_status status = AE_OK;
-	union acpi_ec *ec = NULL;
+	struct acpi_ec *ec = NULL;
 
 
 	if (!device)
 		return -EINVAL;
 
-	ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+	ec = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
 	if (!ec)
 		return -ENOMEM;
-	memset(ec, 0, sizeof(union acpi_ec));
-
-	ec->common.handle = device->handle;
-	ec->common.uid = -1;
-	init_MUTEX(&ec->poll.sem);
-	strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
-	strcpy(acpi_device_class(device), ACPI_EC_CLASS);
-	acpi_driver_data(device) = ec;
-
-	/* Use the global lock for all EC transactions? */
-	acpi_evaluate_integer(ec->common.handle, "_GLK", NULL,
-			      &ec->common.global_lock);
-
-	/* XXX we don't test uids, because on some boxes ecdt uid = 0, see:
-	   http://bugzilla.kernel.org/show_bug.cgi?id=6111 */
-	if (ec_ecdt) {
-		acpi_remove_address_space_handler(ACPI_ROOT_OBJECT,
-						  ACPI_ADR_SPACE_EC,
-						  &acpi_ec_space_handler);
-
-		acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
-					&acpi_ec_gpe_handler);
-
-		kfree(ec_ecdt);
-	}
-
-	/* Get GPE bit assignment (EC events). */
-	/* TODO: Add support for _GPE returning a package */
-	status =
-	    acpi_evaluate_integer(ec->common.handle, "_GPE", NULL,
-				  &ec->common.gpe_bit);
-	if (ACPI_FAILURE(status)) {
-		ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit"));
-		result = -ENODEV;
-		goto end;
+	memset(ec, 0, sizeof(struct acpi_ec));
+
+	ec->handle = device->handle;
+	ec->uid = -1;
+	init_MUTEX(&ec->sem);
+	if (acpi_ec_mode == EC_INTR) {
+		atomic_set(&ec->leaving_burst, 1);
+		init_waitqueue_head(&ec->wait);
 	}
-
-	result = acpi_ec_add_fs(device);
-	if (result)
-		goto end;
-
-	printk(KERN_INFO PREFIX "%s [%s] (gpe %d) polling mode.\n",
-	       acpi_device_name(device), acpi_device_bid(device),
-	       (u32) ec->common.gpe_bit);
-
-	if (!first_ec)
-		first_ec = device;
-
-      end:
-	if (result)
-		kfree(ec);
-
-	return result;
-}
-static int acpi_ec_intr_add(struct acpi_device *device)
-{
-	int result = 0;
-	acpi_status status = AE_OK;
-	union acpi_ec *ec = NULL;
-
-
-	if (!device)
-		return -EINVAL;
-
-	ec = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
-	if (!ec)
-		return -ENOMEM;
-	memset(ec, 0, sizeof(union acpi_ec));
-
-	ec->common.handle = device->handle;
-	ec->common.uid = -1;
-	atomic_set(&ec->intr.pending_gpe, 0);
-	atomic_set(&ec->intr.leaving_burst, 1);
-	init_MUTEX(&ec->intr.sem);
-	init_waitqueue_head(&ec->intr.wait);
 	strcpy(acpi_device_name(device), ACPI_EC_DEVICE_NAME);
 	strcpy(acpi_device_class(device), ACPI_EC_CLASS);
 	acpi_driver_data(device) = ec;
 
 	/* Use the global lock for all EC transactions? */
-	acpi_evaluate_integer(ec->common.handle, "_GLK", NULL,
-			      &ec->common.global_lock);
+	acpi_evaluate_integer(ec->handle, "_GLK", NULL,
+			      &ec->global_lock);
 
 	/* XXX we don't test uids, because on some boxes ecdt uid = 0, see:
 	   http://bugzilla.kernel.org/show_bug.cgi?id=6111 */
@@ -943,7 +831,7 @@ static int acpi_ec_intr_add(struct acpi_device *device)
 						  ACPI_ADR_SPACE_EC,
 						  &acpi_ec_space_handler);
 
-		acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
+		acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit,
 					&acpi_ec_gpe_handler);
 
 		kfree(ec_ecdt);
@@ -952,10 +840,10 @@ static int acpi_ec_intr_add(struct acpi_device *device)
 	/* Get GPE bit assignment (EC events). */
 	/* TODO: Add support for _GPE returning a package */
 	status =
-	    acpi_evaluate_integer(ec->common.handle, "_GPE", NULL,
-				  &ec->common.gpe_bit);
+	    acpi_evaluate_integer(ec->handle, "_GPE", NULL,
+				  &ec->gpe_bit);
 	if (ACPI_FAILURE(status)) {
-		printk(KERN_ERR PREFIX "Obtaining GPE bit assignment\n");
+		ACPI_EXCEPTION((AE_INFO, status, "Obtaining GPE bit assignment"));
 		result = -ENODEV;
 		goto end;
 	}
@@ -964,14 +852,14 @@ static int acpi_ec_intr_add(struct acpi_device *device)
 	if (result)
 		goto end;
 
-	printk(KERN_INFO PREFIX "%s [%s] (gpe %d) interrupt mode.\n",
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "%s [%s] (gpe %d) interrupt mode.",
 	       acpi_device_name(device), acpi_device_bid(device),
-	       (u32) ec->common.gpe_bit);
+	       (u32) ec->gpe_bit));
 
 	if (!first_ec)
 		first_ec = device;
 
-      end:
+  end:
 	if (result)
 		kfree(ec);
 
@@ -980,7 +868,7 @@ static int acpi_ec_intr_add(struct acpi_device *device)
 
 static int acpi_ec_remove(struct acpi_device *device, int type)
 {
-	union acpi_ec *ec = NULL;
+	struct acpi_ec *ec = NULL;
 
 
 	if (!device)
@@ -998,7 +886,7 @@ static int acpi_ec_remove(struct acpi_device *device, int type)
 static acpi_status
 acpi_ec_io_ports(struct acpi_resource *resource, void *context)
 {
-	union acpi_ec *ec = (union acpi_ec *)context;
+	struct acpi_ec *ec = (struct acpi_ec *)context;
 	struct acpi_generic_address *addr;
 
 	if (resource->type != ACPI_RESOURCE_TYPE_IO) {
@@ -1010,10 +898,10 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context)
 	 * the second address region returned is the status/command
 	 * port.
 	 */
-	if (ec->common.data_addr.register_bit_width == 0) {
-		addr = &ec->common.data_addr;
-	} else if (ec->common.command_addr.register_bit_width == 0) {
-		addr = &ec->common.command_addr;
+	if (ec->data_addr.register_bit_width == 0) {
+		addr = &ec->data_addr;
+	} else if (ec->command_addr.register_bit_width == 0) {
+		addr = &ec->command_addr;
 	} else {
 		return AE_CTRL_TERMINATE;
 	}
@@ -1029,7 +917,7 @@ acpi_ec_io_ports(struct acpi_resource *resource, void *context)
 static int acpi_ec_start(struct acpi_device *device)
 {
 	acpi_status status = AE_OK;
-	union acpi_ec *ec = NULL;
+	struct acpi_ec *ec = NULL;
 
 
 	if (!device)
@@ -1043,39 +931,40 @@ static int acpi_ec_start(struct acpi_device *device)
 	/*
 	 * Get I/O port addresses. Convert to GAS format.
 	 */
-	status = acpi_walk_resources(ec->common.handle, METHOD_NAME__CRS,
+	status = acpi_walk_resources(ec->handle, METHOD_NAME__CRS,
 				     acpi_ec_io_ports, ec);
 	if (ACPI_FAILURE(status)
-	    || ec->common.command_addr.register_bit_width == 0) {
-		printk(KERN_ERR PREFIX "Error getting I/O port addresses\n");
+	    || ec->command_addr.register_bit_width == 0) {
+		ACPI_EXCEPTION((AE_INFO, status,
+				"Error getting I/O port addresses"));
 		return -ENODEV;
 	}
 
-	ec->common.status_addr = ec->common.command_addr;
+	ec->status_addr = ec->command_addr;
 
-	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x\n",
-			  (u32) ec->common.gpe_bit,
-			  (u32) ec->common.command_addr.address,
-			  (u32) ec->common.data_addr.address));
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "gpe=0x%02x, ports=0x%2x,0x%2x",
+			  (u32) ec->gpe_bit,
+			  (u32) ec->command_addr.address,
+			  (u32) ec->data_addr.address));
 
 	/*
 	 * Install GPE handler
 	 */
-	status = acpi_install_gpe_handler(NULL, ec->common.gpe_bit,
+	status = acpi_install_gpe_handler(NULL, ec->gpe_bit,
 					  ACPI_GPE_EDGE_TRIGGERED,
 					  &acpi_ec_gpe_handler, ec);
 	if (ACPI_FAILURE(status)) {
 		return -ENODEV;
 	}
-	acpi_set_gpe_type(NULL, ec->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
-	acpi_enable_gpe(NULL, ec->common.gpe_bit, ACPI_NOT_ISR);
+	acpi_set_gpe_type(NULL, ec->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
+	acpi_enable_gpe(NULL, ec->gpe_bit, ACPI_NOT_ISR);
 
-	status = acpi_install_address_space_handler(ec->common.handle,
+	status = acpi_install_address_space_handler(ec->handle,
 						    ACPI_ADR_SPACE_EC,
 						    &acpi_ec_space_handler,
 						    &acpi_ec_space_setup, ec);
 	if (ACPI_FAILURE(status)) {
-		acpi_remove_gpe_handler(NULL, ec->common.gpe_bit,
+		acpi_remove_gpe_handler(NULL, ec->gpe_bit,
 					&acpi_ec_gpe_handler);
 		return -ENODEV;
 	}
@@ -1086,7 +975,7 @@ static int acpi_ec_start(struct acpi_device *device)
 static int acpi_ec_stop(struct acpi_device *device, int type)
 {
 	acpi_status status = AE_OK;
-	union acpi_ec *ec = NULL;
+	struct acpi_ec *ec = NULL;
 
 
 	if (!device)
@@ -1094,14 +983,14 @@ static int acpi_ec_stop(struct acpi_device *device, int type)
 
 	ec = acpi_driver_data(device);
 
-	status = acpi_remove_address_space_handler(ec->common.handle,
+	status = acpi_remove_address_space_handler(ec->handle,
 						   ACPI_ADR_SPACE_EC,
 						   &acpi_ec_space_handler);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
 	status =
-	    acpi_remove_gpe_handler(NULL, ec->common.gpe_bit,
+	    acpi_remove_gpe_handler(NULL, ec->gpe_bit,
 				    &acpi_ec_gpe_handler);
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
@@ -1113,76 +1002,33 @@ static acpi_status __init
 acpi_fake_ecdt_callback(acpi_handle handle,
 			u32 Level, void *context, void **retval)
 {
-
-	if (acpi_ec_poll_mode)
-		return acpi_fake_ecdt_poll_callback(handle,
-						       Level, context, retval);
-	else
-		return acpi_fake_ecdt_intr_callback(handle,
-						     Level, context, retval);
-}
-
-static acpi_status __init
-acpi_fake_ecdt_poll_callback(acpi_handle handle,
-				u32 Level, void *context, void **retval)
-{
-	acpi_status status;
-
-	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
-				     acpi_ec_io_ports, ec_ecdt);
-	if (ACPI_FAILURE(status))
-		return status;
-	ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
-
-	ec_ecdt->common.uid = -1;
-	acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
-
-	status =
-	    acpi_evaluate_integer(handle, "_GPE", NULL,
-				  &ec_ecdt->common.gpe_bit);
-	if (ACPI_FAILURE(status))
-		return status;
-	init_MUTEX(&ec_ecdt->poll.sem);
-	ec_ecdt->common.global_lock = TRUE;
-	ec_ecdt->common.handle = handle;
-
-	printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
-	       (u32) ec_ecdt->common.gpe_bit,
-	       (u32) ec_ecdt->common.command_addr.address,
-	       (u32) ec_ecdt->common.data_addr.address);
-
-	return AE_CTRL_TERMINATE;
-}
-
-static acpi_status __init
-acpi_fake_ecdt_intr_callback(acpi_handle handle,
-			      u32 Level, void *context, void **retval)
-{
 	acpi_status status;
 
-	init_MUTEX(&ec_ecdt->intr.sem);
-	init_waitqueue_head(&ec_ecdt->intr.wait);
+	init_MUTEX(&ec_ecdt->sem);
+	if (acpi_ec_mode == EC_INTR) {
+		init_waitqueue_head(&ec_ecdt->wait);
+	}
 	status = acpi_walk_resources(handle, METHOD_NAME__CRS,
 				     acpi_ec_io_ports, ec_ecdt);
 	if (ACPI_FAILURE(status))
 		return status;
-	ec_ecdt->common.status_addr = ec_ecdt->common.command_addr;
+	ec_ecdt->status_addr = ec_ecdt->command_addr;
 
-	ec_ecdt->common.uid = -1;
-	acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->common.uid);
+	ec_ecdt->uid = -1;
+	acpi_evaluate_integer(handle, "_UID", NULL, &ec_ecdt->uid);
 
 	status =
 	    acpi_evaluate_integer(handle, "_GPE", NULL,
-				  &ec_ecdt->common.gpe_bit);
+				  &ec_ecdt->gpe_bit);
 	if (ACPI_FAILURE(status))
 		return status;
-	ec_ecdt->common.global_lock = TRUE;
-	ec_ecdt->common.handle = handle;
+	ec_ecdt->global_lock = TRUE;
+	ec_ecdt->handle = handle;
 
-	printk(KERN_INFO PREFIX "GPE=0x%02x, ports=0x%2x, 0x%2x\n",
-	       (u32) ec_ecdt->common.gpe_bit,
-	       (u32) ec_ecdt->common.command_addr.address,
-	       (u32) ec_ecdt->common.data_addr.address);
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "GPE=0x%02x, ports=0x%2x, 0x%2x",
+	       (u32) ec_ecdt->gpe_bit,
+	       (u32) ec_ecdt->command_addr.address,
+	       (u32) ec_ecdt->data_addr.address));
 
 	return AE_CTRL_TERMINATE;
 }
@@ -1202,14 +1048,14 @@ static int __init acpi_ec_fake_ecdt(void)
 	acpi_status status;
 	int ret = 0;
 
-	printk(KERN_INFO PREFIX "Try to make an fake ECDT\n");
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Try to make an fake ECDT"));
 
-	ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+	ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
 	if (!ec_ecdt) {
 		ret = -ENOMEM;
 		goto error;
 	}
-	memset(ec_ecdt, 0, sizeof(union acpi_ec));
+	memset(ec_ecdt, 0, sizeof(struct acpi_ec));
 
 	status = acpi_get_devices(ACPI_EC_HID,
 				  acpi_fake_ecdt_callback, NULL, NULL);
@@ -1217,24 +1063,16 @@ static int __init acpi_ec_fake_ecdt(void)
 		kfree(ec_ecdt);
 		ec_ecdt = NULL;
 		ret = -ENODEV;
+		ACPI_EXCEPTION((AE_INFO, status, "Can't make an fake ECDT"));
 		goto error;
 	}
 	return 0;
-      error:
-	printk(KERN_ERR PREFIX "Can't make an fake ECDT\n");
+  error:
 	return ret;
 }
 
 static int __init acpi_ec_get_real_ecdt(void)
 {
-	if (acpi_ec_poll_mode)
-		return acpi_ec_poll_get_real_ecdt();
-	else
-		return acpi_ec_intr_get_real_ecdt();
-}
-
-static int __init acpi_ec_poll_get_real_ecdt(void)
-{
 	acpi_status status;
 	struct acpi_table_ecdt *ecdt_ptr;
 
@@ -1244,80 +1082,37 @@ static int __init acpi_ec_poll_get_real_ecdt(void)
 	if (ACPI_FAILURE(status))
 		return -ENODEV;
 
-	printk(KERN_INFO PREFIX "Found ECDT\n");
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Found ECDT"));
 
 	/*
 	 * Generate a temporary ec context to use until the namespace is scanned
 	 */
-	ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
+	ec_ecdt = kmalloc(sizeof(struct acpi_ec), GFP_KERNEL);
 	if (!ec_ecdt)
 		return -ENOMEM;
-	memset(ec_ecdt, 0, sizeof(union acpi_ec));
-
-	ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
-	ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
-	ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
-	ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
-	init_MUTEX(&ec_ecdt->poll.sem);
-	/* use the GL just to be safe */
-	ec_ecdt->common.global_lock = TRUE;
-	ec_ecdt->common.uid = ecdt_ptr->uid;
+	memset(ec_ecdt, 0, sizeof(struct acpi_ec));
 
-	status =
-	    acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
-	if (ACPI_FAILURE(status)) {
-		goto error;
+	init_MUTEX(&ec_ecdt->sem);
+	if (acpi_ec_mode == EC_INTR) {
+		init_waitqueue_head(&ec_ecdt->wait);
 	}
-
-	return 0;
-      error:
-	printk(KERN_ERR PREFIX "Could not use ECDT\n");
-	kfree(ec_ecdt);
-	ec_ecdt = NULL;
-
-	return -ENODEV;
-}
-
-static int __init acpi_ec_intr_get_real_ecdt(void)
-{
-	acpi_status status;
-	struct acpi_table_ecdt *ecdt_ptr;
-
-	status = acpi_get_firmware_table("ECDT", 1, ACPI_LOGICAL_ADDRESSING,
-					 (struct acpi_table_header **)
-					 &ecdt_ptr);
-	if (ACPI_FAILURE(status))
-		return -ENODEV;
-
-	printk(KERN_INFO PREFIX "Found ECDT\n");
-
-	/*
-	 * Generate a temporary ec context to use until the namespace is scanned
-	 */
-	ec_ecdt = kmalloc(sizeof(union acpi_ec), GFP_KERNEL);
-	if (!ec_ecdt)
-		return -ENOMEM;
-	memset(ec_ecdt, 0, sizeof(union acpi_ec));
-
-	init_MUTEX(&ec_ecdt->intr.sem);
-	init_waitqueue_head(&ec_ecdt->intr.wait);
-	ec_ecdt->common.command_addr = ecdt_ptr->ec_control;
-	ec_ecdt->common.status_addr = ecdt_ptr->ec_control;
-	ec_ecdt->common.data_addr = ecdt_ptr->ec_data;
-	ec_ecdt->common.gpe_bit = ecdt_ptr->gpe_bit;
+	ec_ecdt->command_addr = ecdt_ptr->ec_control;
+	ec_ecdt->status_addr = ecdt_ptr->ec_control;
+	ec_ecdt->data_addr = ecdt_ptr->ec_data;
+	ec_ecdt->gpe_bit = ecdt_ptr->gpe_bit;
 	/* use the GL just to be safe */
-	ec_ecdt->common.global_lock = TRUE;
-	ec_ecdt->common.uid = ecdt_ptr->uid;
+	ec_ecdt->global_lock = TRUE;
+	ec_ecdt->uid = ecdt_ptr->uid;
 
 	status =
-	    acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->common.handle);
+	    acpi_get_handle(NULL, ecdt_ptr->ec_id, &ec_ecdt->handle);
 	if (ACPI_FAILURE(status)) {
 		goto error;
 	}
 
 	return 0;
-      error:
-	printk(KERN_ERR PREFIX "Could not use ECDT\n");
+  error:
+	ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
 	kfree(ec_ecdt);
 	ec_ecdt = NULL;
 
@@ -1342,14 +1137,14 @@ int __init acpi_ec_ecdt_probe(void)
 	/*
 	 * Install GPE handler
 	 */
-	status = acpi_install_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
+	status = acpi_install_gpe_handler(NULL, ec_ecdt->gpe_bit,
 					  ACPI_GPE_EDGE_TRIGGERED,
 					  &acpi_ec_gpe_handler, ec_ecdt);
 	if (ACPI_FAILURE(status)) {
 		goto error;
 	}
-	acpi_set_gpe_type(NULL, ec_ecdt->common.gpe_bit, ACPI_GPE_TYPE_RUNTIME);
-	acpi_enable_gpe(NULL, ec_ecdt->common.gpe_bit, ACPI_NOT_ISR);
+	acpi_set_gpe_type(NULL, ec_ecdt->gpe_bit, ACPI_GPE_TYPE_RUNTIME);
+	acpi_enable_gpe(NULL, ec_ecdt->gpe_bit, ACPI_NOT_ISR);
 
 	status = acpi_install_address_space_handler(ACPI_ROOT_OBJECT,
 						    ACPI_ADR_SPACE_EC,
@@ -1357,7 +1152,7 @@ int __init acpi_ec_ecdt_probe(void)
 						    &acpi_ec_space_setup,
 						    ec_ecdt);
 	if (ACPI_FAILURE(status)) {
-		acpi_remove_gpe_handler(NULL, ec_ecdt->common.gpe_bit,
+		acpi_remove_gpe_handler(NULL, ec_ecdt->gpe_bit,
 					&acpi_ec_gpe_handler);
 		goto error;
 	}
@@ -1365,7 +1160,7 @@ int __init acpi_ec_ecdt_probe(void)
 	return 0;
 
       error:
-	printk(KERN_ERR PREFIX "Could not use ECDT\n");
+	ACPI_EXCEPTION((AE_INFO, status, "Could not use ECDT"));
 	kfree(ec_ecdt);
 	ec_ecdt = NULL;
 
@@ -1424,13 +1219,13 @@ static int __init acpi_ec_set_intr_mode(char *str)
 		return 0;
 
 	if (intr) {
-		acpi_ec_poll_mode = EC_INTR;
-		acpi_ec_driver.ops.add = acpi_ec_intr_add;
+		acpi_ec_mode = EC_INTR;
 	} else {
-		acpi_ec_poll_mode = EC_POLL;
-		acpi_ec_driver.ops.add = acpi_ec_poll_add;
+		acpi_ec_mode = EC_POLL;
 	}
-	printk(KERN_INFO PREFIX "EC %s mode.\n", intr ? "interrupt" : "polling");
+	acpi_ec_driver.ops.add = acpi_ec_add;
+	ACPI_DEBUG_PRINT((ACPI_DB_INFO, "EC %s mode.\n", intr ? "interrupt" : "polling"));
+
 	return 1;
 }