PE2 (reference) in projects: linux-4.4.14

10 #define PE2		(1 << 2)  macro

719 	PINMUX_GPIO(PE2),

1140 	PINMUX_GPIO(PE2),

817 							 AT91_PIOE 2 AT91_PERIPH_A AT91_PINCTRL_NONE	/* PE2 periph A */

/linux-4.4.14/arch/blackfin/include/mach-common/
D	ports-e.h	`10 #define PE2 (1 << 2) macro`
/linux-4.4.14/drivers/pinctrl/sh-pfc/
D	pfc-shx3.c	`335 PINMUX_GPIO(PE2),`
D	pfc-sh7785.c	`719 PINMUX_GPIO(PE2),`
D	pfc-sh7203.c	`780 PINMUX_GPIO(PE2),`
D	pfc-sh7264.c	`1140 PINMUX_GPIO(PE2),`
D	pfc-sh7269.c	`1518 PINMUX_GPIO(PE2),`
/linux-4.4.14/arch/arm/boot/dts/
D	at91sam9g45.dtsi	`817 AT91_PIOE 2 AT91_PERIPH_A AT91_PINCTRL_NONE /* PE2 periph A */`