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authorDave Airlie <airlied@redhat.com>2011-05-09 11:40:25 +1000
committerDave Airlie <airlied@redhat.com>2011-05-09 11:40:38 +1000
commit000703f44c77b152cd966eaf06f4ab043274ff46 (patch)
treec71b325073713c3089856f627442181a47d1482a /drivers/platform
parentf19467c509e36e5ba3498efd7d4072d3581a1d6c (diff)
mxm/wmi: add MXMX interface entry point.
The MXMX method appears to be a mutex of some sort. Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/platform')
-rw-r--r--drivers/platform/x86/mxm-wmi.c28
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/platform/x86/mxm-wmi.c b/drivers/platform/x86/mxm-wmi.c
index 12b6f341e72..0aea63b3729 100644
--- a/drivers/platform/x86/mxm-wmi.c
+++ b/drivers/platform/x86/mxm-wmi.c
@@ -32,6 +32,7 @@ MODULE_LICENSE("GPL");
MODULE_ALIAS("wmi:"MXM_WMMX_GUID);
#define MXM_WMMX_FUNC_MXDS 0x5344584D /* "MXDS" */
+#define MXM_WMMX_FUNC_MXMX 0x53445344 /* "MXMX" */
struct mxds_args {
u32 func;
@@ -51,7 +52,7 @@ int mxm_wmi_call_mxds(int adapter)
acpi_status status;
printk("calling mux switch %d\n", adapter);
-
+
status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
&output);
@@ -64,6 +65,31 @@ int mxm_wmi_call_mxds(int adapter)
}
EXPORT_SYMBOL_GPL(mxm_wmi_call_mxds);
+int mxm_wmi_call_mxmx(int adapter)
+{
+ struct mxds_args args = {
+ .func = MXM_WMMX_FUNC_MXMX,
+ .args = 0,
+ .xarg = 1,
+ };
+ struct acpi_buffer input = { (acpi_size)sizeof(args), &args };
+ struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+ acpi_status status;
+
+ printk("calling mux switch %d\n", adapter);
+
+ status = wmi_evaluate_method(MXM_WMMX_GUID, 0x1, adapter, &input,
+ &output);
+
+ if (ACPI_FAILURE(status))
+ return status;
+
+ printk("mux mutex set switched %d\n", status);
+ return 0;
+
+}
+EXPORT_SYMBOL_GPL(mxm_wmi_call_mxmx);
+
bool mxm_wmi_supported(void)
{
bool guid_valid;