Messages in this thread | | | From | Andy Shevchenko <> | Date | Fri, 3 Nov 2017 14:50:52 +0200 | Subject | Re: [PATCH v2 4/4] platform/x86: topstar-laptop: add optional WLAN LED workaround |
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On Sun, Oct 29, 2017 at 1:53 AM, Guillaume Douézan-Grard <gdouezangrard@gmail.com> wrote: > Topstar U931 laptops provide an LED synced with the WLAN adapter > hard-blocking state. Unfortunately, some models seem to be defective, > making impossible to hard-block the adapter with the WLAN switch and > thus the LED is useless. > > An ACPI method is available to programmatically control this switch and > it indirectly allows to control the LED. > > This commit registers the LED within the corresponding subsystem, making > possible for instance to use an rfkill-based trigger to synchronize the > LED with the soft-blocking state. > > This feature is disabled by default and can be enabled with the > `led_workaround` module parameter.
> #include <linux/platform_device.h> > #include <linux/input.h> > #include <linux/input/sparse-keymap.h> > +#include <linux/leds.h>
Yep, exact place, esp. after moving platform_device to the right place.
> +static bool led_workaround; > +module_param_named(led_workaround, led_workaround, bool, 0444); > +MODULE_PARM_DESC(led_workaround, > + "Enables software-based WLAN LED control on systems with defective hardware switch");
So, this is most problematic piece in the series.
We are not encouraging module parameters. Why do we need one? Can't be detected automatically (perhaps based on DMI strings)?
-- With Best Regards, Andy Shevchenko
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