linux-vybrid_public/include/asm-arm/arch-pxa/pxa27x_keypad.h

#define PXAKBD_MAXROW		8
#define PXAKBD_MAXCOL		8

struct pxa27x_keypad_platform_data {
	int nr_rows, nr_cols;
	int keycodes[PXAKBD_MAXROW][PXAKBD_MAXCOL];

#ifdef CONFIG_PM
	u32 reg_kpc;
	u32 reg_kprec;
#endif
};