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Device trees allow mixing different kinds of GPIOs in one property. For
that it is usefull to only provide a pointer to an arbitrary location in
the property and initialize a GPIO from that.
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The imx-gpio driver used in i.MX and i.MXRT BSPs generates a name based
on a fixed string. The original code only used one digit for the
controller. With the 13 GPIO controllers of the i.MXRT1166, that isn't
enough any more. This patch extends the name to two digits which should
be enough for the next controller generations.
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On most i.MX* the upper bits in SW_PAD_CTL are reserved. On some chips,
like the i.MXRT1166, they are a domain write protection. Setting them to
1 can have unexpected side effects.
The device tree uses these bits for some flags. Make sure that they are
not accidentally written to some value.
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The embedded brains GmbH & Co. KG is the legal successor of embedded
brains GmbH.
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Update #4180
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Update #4180
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Update #4180
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