修改led为gpio

hc

2024-10-12 a5969cabbb4660eab42b6ef0412cbbd1200cf14d

 kernel/Documentation/input/event-codes.rst
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@@ -190,7 +190,26 @@
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 * REL_WHEEL, REL_HWHEEL:
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   - These codes are used for vertical and horizontal scroll wheels,
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-    respectively.
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+    respectively. The value is the number of detents moved on the wheel, the
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+    physical size of which varies by device. For high-resolution wheels
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+    this may be an approximation based on the high-resolution scroll events,
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+    see REL_WHEEL_HI_RES. These event codes are legacy codes and
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+    REL_WHEEL_HI_RES and REL_HWHEEL_HI_RES should be preferred where
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+    available.
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+
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+* REL_WHEEL_HI_RES, REL_HWHEEL_HI_RES:
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+
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+  - High-resolution scroll wheel data. The accumulated value 120 represents
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+    movement by one detent. For devices that do not provide high-resolution
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+    scrolling, the value is always a multiple of 120. For devices with
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+    high-resolution scrolling, the value may be a fraction of 120.
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+
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+    If a vertical scroll wheel supports high-resolution scrolling, this code
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+    will be emitted in addition to REL_WHEEL or REL_HWHEEL. The REL_WHEEL
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+    and REL_HWHEEL may be an approximation based on the high-resolution
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+    scroll events. There is no guarantee that the high-resolution data
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+    is a multiple of 120 at the time of an emulated REL_WHEEL or REL_HWHEEL
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+    event.
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213
 
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 EV_ABS
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 ------