Every ball on this SoC is shared between several functions, and nothing
in this port could see which function a pad carried or change it. A
driver that finds nothing cannot tell a dead block from a pad still
pointed somewhere else.
Registers the CLMM pad multiplexer with the pinctrl framework and defines
every pad and every function select the manual documents, across the
straps, JTAG, PCIe, HDMI, Ethernet, I2S, SPI, GPIO, USB, I2C, UART, fan
and MIPI CSI groups. Writes nothing at start up: a pad only moves when a
driver asks.
eic7700x_pinctrl_count() reports how many pads currently differ from
their reset defaults, which after boot is the set the boot loader and the
drivers have configured; the board start up logs it.
Assisted-by: Claude:claude-opus-5
Signed-off-by: Justin Hammond <justin@dynam.ac>
830eab5f81