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platform/x86: asus-wmi: export symbols used for read/write WMI

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Export symbols for reading/writing WMI symbols using a namespace.
Existing functions:
- asus_wmi_evaluate_method
- asus_wmi_set_devstate
New function:
- asus_wmi_get_devstate_dsts

The new function is intended for use with DSTS WMI method only and
avoids requiring the asus_wmi driver data to select the WMI method.

Co-developed-by: Denis Benato <denis.benato@linux.dev>
Signed-off-by: Denis Benato <denis.benato@linux.dev>
Signed-off-by: Luke D. Jones <luke@ljones.dev>
Reviewed-by: Mario Limonciello <mario.limonciello@amd.com>
Link: https://patch.msgid.link/20251102215319.3126879-2-denis.benato@linux.dev
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
Luke D. Jones 2025-11-02 22:53:11 +01:00 committed by Ilpo Järvinen
parent ff49362eca
commit 22ea7b9d96
No known key found for this signature in database
GPG Key ID: 59AC4F6153E5CE31
2 changed files with 48 additions and 3 deletions
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46
drivers/platform/x86/asus-wmi.c
View File

@ -390,7 +390,7 @@ int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval)
{
return asus_wmi_evaluate_method3(method_id, arg0, arg1, 0, retval);
}
EXPORT_SYMBOL_GPL(asus_wmi_evaluate_method);
EXPORT_SYMBOL_NS_GPL(asus_wmi_evaluate_method, "ASUS_WMI");
static int asus_wmi_evaluate_method5(u32 method_id,
u32 arg0, u32 arg1, u32 arg2, u32 arg3, u32 arg4, u32 *retval)
@ -554,12 +554,52 @@ static int asus_wmi_get_devstate(struct asus_wmi *asus, u32 dev_id, u32 *retval)
return 0;
}
int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param,
u32 *retval)
/**
* asus_wmi_get_devstate_dsts() - Get the WMI function state.
* @dev_id: The WMI method ID to call.
* @retval: A pointer to where to store the value returned from WMI.
*
* Returns:
* * %-ENODEV - method ID is unsupported.
* * %0 - successful and retval is filled.
* * %other - error from WMI call.
*/
int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
{
int err;
err = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, dev_id, 0, retval);
if (err)
return err;
if ((*retval & ASUS_WMI_DSTS_PRESENCE_BIT) == 0x00)
return -ENODEV;
return 0;
}
EXPORT_SYMBOL_NS_GPL(asus_wmi_get_devstate_dsts, "ASUS_WMI");
/**
* asus_wmi_set_devstate() - Set the WMI function state.
*
* Note: an asus_wmi_set_devstate() call must be paired with a
* asus_wmi_get_devstate_dsts() to check if the WMI function is supported.
*
* @dev_id: The WMI function to call.
* @ctrl_param: The argument to be used for this WMI function.
* @retval: A pointer to where to store the value returned from WMI.
*
* Returns:
* * %-ENODEV - method ID is unsupported.
* * %0 - successful and retval is filled.
* * %other - error from WMI call.
*/
int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
{
return asus_wmi_evaluate_method(ASUS_WMI_METHODID_DEVS, dev_id,
ctrl_param, retval);
}
EXPORT_SYMBOL_NS_GPL(asus_wmi_set_devstate, "ASUS_WMI");
/* Helper for special devices with magic return codes */
static int asus_wmi_get_devstate_bits(struct asus_wmi *asus,

5
include/linux/platform_data/x86/asus-wmi.h
View File

@ -166,6 +166,7 @@ enum asus_ally_mcu_hack {
#if IS_REACHABLE(CONFIG_ASUS_WMI)
void set_ally_mcu_hack(enum asus_ally_mcu_hack status);
void set_ally_mcu_powersave(bool enabled);
int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval);
int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval);
int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1, u32 *retval);
#else
@ -179,6 +180,10 @@ static inline int asus_wmi_set_devstate(u32 dev_id, u32 ctrl_param, u32 *retval)
{
return -ENODEV;
}
static inline int asus_wmi_get_devstate_dsts(u32 dev_id, u32 *retval)
{
return -ENODEV;
}
static inline int asus_wmi_evaluate_method(u32 method_id, u32 arg0, u32 arg1,
u32 *retval)
{