rtl88x2CE_WiFi_linux driver

hc

2024-05-10 cde9070d9970eef1f7ec2360586c802a16230ad8

 kernel/Documentation/driver-api/gpio/drivers-on-gpio.rst
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   Consumer Electronics Control bus using only GPIO. It is used to communicate
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   with devices on the HDMI bus.
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+- gpio-charger: drivers/power/supply/gpio-charger.c is used if you need to do
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+  battery charging and all you have to go by to check the presence of the
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+  AC charger or more complex tasks such as indicating charging status using
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+  nothing but GPIO lines, this driver provides that and also a clearly defined
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+  way to pass the charging parameters from hardware descriptions such as the
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+  device tree.
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+
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 Apart from this there are special GPIO drivers in subsystems like MMC/SD to
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 read card detect and write protect GPIO lines, and in the TTY serial subsystem
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 to emulate MCTRL (modem control) signals CTS/RTS by using two GPIO lines. The
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 MTD NOR flash has add-ons for extra GPIO lines too, though the address bus is
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 usually connected directly to the flash.
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-Use those instead of talking directly to the GPIOs using sysfs; they integrate
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-with kernel frameworks better than your userspace code could. Needless to say,
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-just using the appropriate kernel drivers will simplify and speed up your
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-embedded hacking in particular by providing ready-made components.
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+Use those instead of talking directly to the GPIOs from userspace; they
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+integrate with kernel frameworks better than your userspace code could.
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+Needless to say, just using the appropriate kernel drivers will simplify and
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+speed up your embedded hacking in particular by providing ready-made components.