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author | Dave Airlie <airlied@redhat.com> | 2011-05-09 11:40:25 +1000 |
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committer | Dave Airlie <airlied@redhat.com> | 2011-05-09 11:40:38 +1000 |
commit | 000703f44c77b152cd966eaf06f4ab043274ff46 (patch) | |
tree | c71b325073713c3089856f627442181a47d1482a /drivers/platform/x86 | |
parent | f19467c509e36e5ba3498efd7d4072d3581a1d6c (diff) | |
download | linux-stable-000703f44c77b152cd966eaf06f4ab043274ff46.tar.gz linux-stable-000703f44c77b152cd966eaf06f4ab043274ff46.tar.bz2 linux-stable-000703f44c77b152cd966eaf06f4ab043274ff46.zip |
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/x86')
-rw-r--r-- | drivers/platform/x86/mxm-wmi.c | 28 |
1 files changed, 27 insertions, 1 deletions
diff --git a/drivers/platform/x86/mxm-wmi.c b/drivers/platform/x86/mxm-wmi.c index 12b6f341e72b..0aea63b3729a 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; |