Subject: [PATCH] [acpi ec] Implement polling wait method

- Set method pointer in ec_poll_init()
- Based on acpi_ec_poll_wait() from old school driver
  (few changes)

Signed-off-by: Patrick Mochel <mochel@linux.intel.com>

---

 drivers/acpi/drivers/ec/poll.c |   29 +++++++++++++++++++++++++++++
 1 files changed, 29 insertions(+), 0 deletions(-)

applies-to: bc0fe0419b8513fc0928f3ce8993f114be0ae728
11d9963b8db87c49ede809b82b81be46600eb128
diff --git a/drivers/acpi/drivers/ec/poll.c b/drivers/acpi/drivers/ec/poll.c
index 0ecabcb..c7f49d3 100644
--- a/drivers/acpi/drivers/ec/poll.c
+++ b/drivers/acpi/drivers/ec/poll.c
@@ -14,7 +14,36 @@
 
 #include "ec.h"
 
+static int wait_poll(struct acpi_ec * ec, u32 event)
+{
+	u32 status;
+	u32 i = ACPI_EC_UDELAY_COUNT;
+	int ret = 0;
+
+	/*
+	 * Poll the EC status register waiting for the event to occur
+	 */
+	if (event == ACPI_EC_EVENT_OBF) {
+		do {
+			status = ec_read_status(ec);
+			if (status & ACPI_EC_FLAG_OBF)
+				goto Done;
+		} while (--i > 0);
+	} else if (event == ACPI_EC_EVENT_IBE) {
+		do {
+			status = ec_read_status(ec);
+			if (!(status & ACPI_EC_FLAG_IBF))
+				goto Done;
+		} while (--i > 0);
+	} else
+		ret = -EINVAL;
+	ret = -ETIME;
+ Done:
+	return ret;
+}
+
 int ec_poll_init(struct acpi_ec * ec)
 {
+	ec->e_wait = wait_poll;
 	return 0;
 }
---
0.99.9.GIT