[PATCH 1/4] ACPI: EC: Add ec_get_handle()

From: Seth Forshee
Date: Thu Dec 15 2011 - 13:07:09 EST


toshiba_acpi needs to execute an AML method within the EC namespace
to make hotkeys work on some platforms. Provide an interface to
allow it to easily get a handle to the EC namespace for this purpose.

Signed-off-by: Seth Forshee <seth.forshee@xxxxxxxxxxxxx>
---
drivers/acpi/ec.c | 10 ++++++++++
include/linux/acpi.h | 1 +
2 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index b19a18d..e37615f 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -445,6 +445,16 @@ int ec_transaction(u8 command,

EXPORT_SYMBOL(ec_transaction);

+/* Get the handle to the EC device */
+acpi_handle ec_get_handle(void)
+{
+ if (!first_ec)
+ return NULL;
+ return first_ec->handle;
+}
+
+EXPORT_SYMBOL(ec_get_handle);
+
void acpi_ec_block_transactions(void)
{
struct acpi_ec *ec = first_ec;
diff --git a/include/linux/acpi.h b/include/linux/acpi.h
index 6001b4da..ecccbb7 100644
--- a/include/linux/acpi.h
+++ b/include/linux/acpi.h
@@ -151,6 +151,7 @@ extern int ec_write(u8 addr, u8 val);
extern int ec_transaction(u8 command,
const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len);
+extern acpi_handle ec_get_handle(void);

#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)

--
1.7.5.4

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/