On Fri, Dec 27, 2024 at 04:21:14AM +0100, Armin Wolf wrote: > Am 21.12.24 um 06:59 schrieb Kurt Borja: > > > Add WMI drivers for LEGACY and WMAX devices. > > > > This involves moving platform driver and device registration to a helper > > function, which is now called from the driver's preferred WMI device > > driver probe. However this is only done if !quirks->thermal because > > newer WMAX interface doesn't support any of the features exposed by this > > device. > > > > Only one driver is registered on module initialization to prevent > > registering duplicate platform driver and device. > > > > Aditionally, create_thermal_profile() now takes wmi_device * instead of > > platform_device *. > > Since the HDMI, Amplifier and deepslp groups depend on the WMAX interface i would > register them inside wmax_wmi_probe() using device_add_groups() (you might need to > rework alienware_alienfx_setup() for that). > > In the end the only code shared between both drivers should be related to the LED handling. > Everything else AFAIK depends on the WMAX interface and should therefore be inside the > WMAX driver. Unfortunately this breaks old user-space interface, as the path to this attributes would change :(. This is why I can't even set a parent dev for the platform_device. I only know of one project which interefaces with this driver [1], and it does use the /sys/devices/platform/alienware-wmi path. Maybe I could send a pull req, but it would still break old unknown projects and scripts. [1] https://crates.io/crates/alienware > > Thanks, > Armin Wolf > > > > > Signed-off-by: Kurt Borja <kuurtb@xxxxxxxxx> > > --- > > drivers/platform/x86/dell/alienware-wmi.c | 186 +++++++++++++++++----- > > 1 file changed, 146 insertions(+), 40 deletions(-) > > > > diff --git a/drivers/platform/x86/dell/alienware-wmi.c b/drivers/platform/x86/dell/alienware-wmi.c > > index 4b68d64bd742..f2f6842e27e6 100644 > > --- a/drivers/platform/x86/dell/alienware-wmi.c > > +++ b/drivers/platform/x86/dell/alienware-wmi.c > > @@ -15,6 +15,7 @@ > > #include <linux/platform_profile.h> > > #include <linux/dmi.h> > > #include <linux/leds.h> > > +#include <linux/wmi.h> > > > > #define LEGACY_CONTROL_GUID "A90597CE-A997-11DA-B012-B622A1EF5492" > > #define LEGACY_POWER_CONTROL_GUID "A80593CE-A997-11DA-B012-B622A1EF5492" > > @@ -39,8 +40,6 @@ > > MODULE_AUTHOR("Mario Limonciello <mario.limonciello@xxxxxxxxxxx>"); > > MODULE_DESCRIPTION("Alienware special feature control"); > > MODULE_LICENSE("GPL"); > > -MODULE_ALIAS("wmi:" LEGACY_CONTROL_GUID); > > -MODULE_ALIAS("wmi:" WMAX_CONTROL_GUID); > > > > static bool force_platform_profile; > > module_param_unsafe(force_platform_profile, bool, 0); > > @@ -412,7 +411,10 @@ struct alienfx_priv { > > u8 lighting_control_state; > > }; > > > > -static struct platform_device *platform_device; > > +struct alienfx_platdata { > > + struct wmi_device *wdev; > > +}; > > + > > static struct platform_profile_handler pp_handler; > > static enum wmax_thermal_mode supported_thermal_profiles[PLATFORM_PROFILE_LAST]; > > > > @@ -1048,7 +1050,7 @@ static int thermal_profile_set(struct platform_profile_handler *pprof, > > return wmax_thermal_control(supported_thermal_profiles[profile]); > > } > > > > -static int create_thermal_profile(struct platform_device *platform_device) > > +static int create_thermal_profile(struct wmi_device *wdev) > > { > > enum platform_profile_option profile; > > enum wmax_thermal_mode mode; > > @@ -1097,7 +1099,7 @@ static int create_thermal_profile(struct platform_device *platform_device) > > pp_handler.profile_get = thermal_profile_get; > > pp_handler.profile_set = thermal_profile_set; > > pp_handler.name = "alienware-wmi"; > > - pp_handler.dev = &platform_device->dev; > > + pp_handler.dev = &wdev->dev; > > > > return platform_profile_register(&pp_handler); > > } > > @@ -1153,19 +1155,138 @@ static struct platform_driver platform_driver = { > > .probe = alienfx_probe, > > }; > > > > -static int __init alienware_wmi_init(void) > > +static int alienware_alienfx_setup(struct alienfx_platdata *pdata) > > { > > + struct platform_device *pdev; > > int ret; > > > > - if (wmi_has_guid(LEGACY_CONTROL_GUID)) > > - interface = LEGACY; > > - else if (wmi_has_guid(WMAX_CONTROL_GUID)) > > - interface = WMAX; > > - else { > > - pr_warn("alienware-wmi: No known WMI GUID found\n"); > > - return -ENODEV; > > + ret = platform_driver_register(&platform_driver); > > + if (ret < 0) > > + return ret; > > + > > + pdev = platform_device_register_data(NULL, "alienware-wmi", > > + PLATFORM_DEVID_NONE, pdata, > > + sizeof(*pdata)); > > + > > + if (IS_ERR(pdev)) { > > + platform_driver_unregister(&platform_driver); > > + return PTR_ERR(pdev); > > } > > > > + dev_set_drvdata(&pdata->wdev->dev, pdev); > > + > > + return 0; > > +} > > + > > +static void alienware_alienfx_exit(struct wmi_device *wdev) > > +{ > > + struct platform_device *pdev; > > + > > + pdev = dev_get_drvdata(&wdev->dev); > > + > > + platform_device_unregister(pdev); > > + platform_driver_unregister(&platform_driver); > > +} > > + > > +/* > > + * Legacy WMI driver > > + */ > > +static int legacy_wmi_probe(struct wmi_device *wdev, const void *context) > > +{ > > + struct alienfx_platdata pdata = { > > + .wdev = wdev, > > + }; > > + > > + return alienware_alienfx_setup(&pdata); > > +} > > + > > +static void legacy_wmi_remove(struct wmi_device *wdev) > > +{ > > + alienware_alienfx_exit(wdev); > > +} > > + > > +static struct wmi_device_id alienware_legacy_device_id_table[] = { > > + { LEGACY_CONTROL_GUID, NULL }, > > + { }, > > +}; > > +MODULE_DEVICE_TABLE(wmi, alienware_legacy_device_id_table); > > + > > +static struct wmi_driver alienware_legacy_wmi_driver = { > > + .driver = { > > + .name = "alienware-wmi-alienfx", > > + .probe_type = PROBE_PREFER_ASYNCHRONOUS, > > + }, > > + .id_table = alienware_legacy_device_id_table, > > + .probe = legacy_wmi_probe, > > + .remove = legacy_wmi_remove, > > +}; > > + > > +static int __init alienware_legacy_wmi_init(void) > > +{ > > + return wmi_driver_register(&alienware_legacy_wmi_driver); > > +} > > + > > +static void __exit alienware_legacy_wmi_exit(void) > > +{ > > + wmi_driver_unregister(&alienware_legacy_wmi_driver); > > +} > > + > > +/* > > + * WMAX WMI driver > > + */ > > +static int wmax_wmi_probe(struct wmi_device *wdev, const void *context) > > +{ > > + struct alienfx_platdata pdata = { > > + .wdev = wdev, > > + }; > > + int ret = 0; > > + > > + if (quirks->thermal) > > + ret = create_thermal_profile(wdev); > > + else > > + ret = alienware_alienfx_setup(&pdata); > > + > > + return ret; > > +} > > + > > +static void wmax_wmi_remove(struct wmi_device *wdev) > > +{ > > + if (quirks->thermal) > > + remove_thermal_profile(); > > + else > > + alienware_alienfx_exit(wdev); > > +} > > + > > +static struct wmi_device_id alienware_wmax_device_id_table[] = { > > + { WMAX_CONTROL_GUID, NULL }, > > + { }, > > +}; > > +MODULE_DEVICE_TABLE(wmi, alienware_wmax_device_id_table); > > + > > +static struct wmi_driver alienware_wmax_wmi_driver = { > > + .driver = { > > + .name = "alienware-wmi-wmax", > > + .probe_type = PROBE_PREFER_ASYNCHRONOUS, > > + }, > > + .id_table = alienware_wmax_device_id_table, > > + .probe = wmax_wmi_probe, > > + .remove = wmax_wmi_remove, > > +}; > > + > > +static int __init alienware_wmax_wmi_init(void) > > +{ > > + return wmi_driver_register(&alienware_wmax_wmi_driver); > > +} > > + > > +static void __exit alienware_wmax_wmi_exit(void) > > +{ > > + wmi_driver_unregister(&alienware_wmax_wmi_driver); > > +} > > + > > +static int __init alienware_wmi_init(void) > > +{ > > + int ret; > > + > > dmi_check_system(alienware_quirks); > > if (quirks == NULL) > > quirks = &quirk_unknown; > > @@ -1180,43 +1301,28 @@ static int __init alienware_wmi_init(void) > > pr_warn("force_gmode requires platform profile support\n"); > > } > > > > - ret = platform_driver_register(&platform_driver); > > - if (ret) > > - goto fail_platform_driver; > > - platform_device = platform_device_alloc("alienware-wmi", PLATFORM_DEVID_NONE); > > - if (!platform_device) { > > - ret = -ENOMEM; > > - goto fail_platform_device1; > > + if (wmi_has_guid(WMAX_CONTROL_GUID)) { > > + interface = WMAX; > > + ret = alienware_wmax_wmi_init(); > > + } else { > > + interface = LEGACY; > > + ret = alienware_legacy_wmi_init(); > > } > > - ret = platform_device_add(platform_device); > > - if (ret) > > - goto fail_platform_device2; > > > > - if (quirks->thermal) { > > - ret = create_thermal_profile(platform_device); > > - if (ret) > > - goto fail_prep_thermal_profile; > > - } > > + if (ret < 0) > > + return ret; > > > > return 0; > > - > > -fail_prep_thermal_profile: > > - platform_device_del(platform_device); > > -fail_platform_device2: > > - platform_device_put(platform_device); > > -fail_platform_device1: > > - platform_driver_unregister(&platform_driver); > > -fail_platform_driver: > > - return ret; > > } > > > > module_init(alienware_wmi_init); > > > > static void __exit alienware_wmi_exit(void) > > { > > - remove_thermal_profile(); > > - platform_device_unregister(platform_device); > > - platform_driver_unregister(&platform_driver); > > + if (interface == WMAX) > > + alienware_wmax_wmi_exit(); > > + else > > + alienware_legacy_wmi_exit(); > > } > > > > module_exit(alienware_wmi_exit);
