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Add support for the pin controller on the UltraRISC DP1000 SoC.
The controller provides mux selection for pins in ports A, B, C, D, and
LPC. Ports A-D default to GPIO and support peripheral muxing. LPC pins
can be switched to eSPI, but are not available as GPIOs. Basic pin
configuration controls such as drive strength, pull-up, and pull-down
are also supported.
Signed-off-by: Jia Wang <wangjia@ultrarisc.com>
Reviewed-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>
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