Subject: [PATCH] acpi ec] Add basic GPE handling

- Create drivers/acpi/drivers/ec/gpe.c
- Add ec_gpe_{init,exit)(), use them to register/unregister
  basic gpe callback.
- Call from ec_{start,stop}()

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

---

 drivers/acpi/drivers/ec/Makefile |    2 +-
 drivers/acpi/drivers/ec/driver.c |    7 +++++-
 drivers/acpi/drivers/ec/ec.h     |    5 +++++
 drivers/acpi/drivers/ec/gpe.c    |   42 ++++++++++++++++++++++++++++++++++++++
 4 files changed, 54 insertions(+), 2 deletions(-)
 create mode 100644 drivers/acpi/drivers/ec/gpe.c

applies-to: 2ef3b01e9ec596102b7b848af7c2ac65fa4cfb6d
dc69107ea6b29cd02a9bd8c9f0d890a309aecfbe
diff --git a/drivers/acpi/drivers/ec/Makefile b/drivers/acpi/drivers/ec/Makefile
index 6afe4ad..c2ee992 100644
--- a/drivers/acpi/drivers/ec/Makefile
+++ b/drivers/acpi/drivers/ec/Makefile
@@ -2,7 +2,7 @@ obj-$(CONFIG_ACPI_EC)	+= ec.o
 
 ec-y			:= driver.o device.o event.o poll.o intr.o
 ec-y			+= setup.o
-ec-y			+= resource.o
+ec-y			+= resource.o gpe.o
 
 ec-$(CONFIG_ACPI_DM_PROC)	+= proc.o
 ec-$(CONFIG_ACPI_DM_SYSFS)	+= sysfs.o
diff --git a/drivers/acpi/drivers/ec/driver.c b/drivers/acpi/drivers/ec/driver.c
index 7ba4bd8..6526b99 100644
--- a/drivers/acpi/drivers/ec/driver.c
+++ b/drivers/acpi/drivers/ec/driver.c
@@ -68,12 +68,17 @@ static int ec_remove(struct acpi_dev * a
 
 static int ec_start(struct acpi_dev * ad)
 {
-	return 0;
+	struct acpi_ec * ec = dev_get_drvdata(&ad->dev);
+
+	return ec_gpe_init(ec);
 }
 
 
 static int ec_stop(struct acpi_dev * ad)
 {
+	struct acpi_ec * ec = dev_get_drvdata(&ad->dev);
+
+	ec_gpe_exit(ec);
 	return 0;
 }
 
diff --git a/drivers/acpi/drivers/ec/ec.h b/drivers/acpi/drivers/ec/ec.h
index 0fd508b..b72ce55 100644
--- a/drivers/acpi/drivers/ec/ec.h
+++ b/drivers/acpi/drivers/ec/ec.h
@@ -76,3 +76,8 @@ extern int ec_resource_init(struct acpi_
 extern int ec_poll_init(struct acpi_ec * ec);
 extern int ec_intr_init(struct acpi_ec * ec);
 
+/*
+ * gpe.c
+ */
+extern int ec_gpe_init(struct acpi_ec * ec);
+extern void ec_gpe_exit(struct acpi_ec * ec);
diff --git a/drivers/acpi/drivers/ec/gpe.c b/drivers/acpi/drivers/ec/gpe.c
new file mode 100644
index 0000000..4fb07b6
--- /dev/null
+++ b/drivers/acpi/drivers/ec/gpe.c
@@ -0,0 +1,42 @@
+/***
+ * drivers/acpi/drivers/ec/poll.c - Polling-driven EC driver
+ *
+ * Copyright (C) 2006 Patrick Mochel
+ *
+ * Based on drivers/acpi/ec.c, which was 
+ *
+ *  Copyright (C) 2004 Luming Yu <luming.yu@intel.com>
+ *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * This file is released under the GPLv2.
+ */
+
+#include "ec.h"
+
+static u32 gpe_callback(void * data)
+{
+	struct acpi_ec * ec = data;
+
+	acpi_disable_gpe(NULL, ec->e_gpe_bit, ACPI_ISR);
+
+	return ACPI_INTERRUPT_HANDLED;
+}
+
+int ec_gpe_init(struct acpi_ec * ec)
+{
+	acpi_status status;
+
+	status = acpi_install_gpe_handler(NULL, ec->e_gpe_bit,
+					  ACPI_GPE_EDGE_TRIGGERED,
+					  gpe_callback, ec);
+	acpi_set_gpe_type(NULL, ec->e_gpe_bit, ACPI_GPE_TYPE_RUNTIME);
+	acpi_enable_gpe(NULL, ec->e_gpe_bit, ACPI_NOT_ISR);
+
+	return ACPI_SUCCESS(status) ? 0 : -ENODEV;
+}
+
+void gpe_exit(struct acpi_ec * ec)
+{
+	acpi_remove_gpe_handler(NULL, ec->e_gpe_bit, gpe_callback);
+}
---
0.99.9.GIT