Commit 49a7a274 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven
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pinctrl: renesas: Add generic support for pin group subsets 



It is fairly common for the pins in a pin group to be a subset of the
pins in another pin group.  Add a macro for defining a pin group that
refers to a subset of an array of pins.  This allows pin groups to share
pin data, and thus save memory.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/b56c4257aee1eab698bae2cf7a08aa05775c0a77.1640269757.git.geert+renesas@glider.be
parent a0894be3

drivers/pinctrl/renesas/sh_pfc.h

+12 −0
Original line number Diff line number Diff line
@@ -58,6 +58,18 @@ struct sh_pfc_pin { 
}

#define SH_PFC_PIN_GROUP(name)	SH_PFC_PIN_GROUP_ALIAS(name, name)



/*

 * Define a pin group referring to a subset of an array of pins.

 */

#define SH_PFC_PIN_GROUP_SUBSET(_name, data, first, n) {		\

	.name = #_name,							\

	.pins = data##_pins + first,					\

	.mux = data##_mux + first,					\

	.nr_pins = n +							\

	BUILD_BUG_ON_ZERO(first + n > ARRAY_SIZE(data##_pins)) +	\

	BUILD_BUG_ON_ZERO(first + n > ARRAY_SIZE(data##_mux)),		\

}



struct sh_pfc_pin_group {

	const char *name;

	const unsigned int *pins;