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ACPI: EC: Add ec_get_handle()

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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@canonical.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Seth Forshee 2012-01-18 13:44:08 -06:00 • committed by Matthew Garrett
commit 3e2abc5a35
2 changed files with 11 additions and 0 deletions
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10
drivers/acpi/ec.c
View file

@ -445,6 +445,16 @@ int ec_transaction(u8 command,
EXPORT_SYMBOL(ec_transaction); 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) void acpi_ec_block_transactions(void)
{ {
struct acpi_ec *ec = first_ec; struct acpi_ec *ec = first_ec;

1
include/linux/acpi.h
View file

@ -151,6 +151,7 @@ extern int ec_write(u8 addr, u8 val);
extern int ec_transaction(u8 command, extern int ec_transaction(u8 command,
const u8 *wdata, unsigned wdata_len, const u8 *wdata, unsigned wdata_len,
u8 *rdata, unsigned rdata_len); u8 *rdata, unsigned rdata_len);
extern acpi_handle ec_get_handle(void);
#if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE) #if defined(CONFIG_ACPI_WMI) || defined(CONFIG_ACPI_WMI_MODULE)