/* * linux/arch/arm/mach-pxa/mfp.c * * PXA3xx Multi-Function Pin Support * * Copyright (C) 2007 Marvell Internation Ltd. * * 2007-08-21: eric miao <eric.miao@marvell.com> * initial version * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/module.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/io.h> #include <linux/syscore_ops.h> #include <mach/hardware.h> #include "mfp-pxa3xx.h" #include <mach/pxa3xx-regs.h> #ifdef [31mCONFIG_PM[0m /* * Configure the MFPs appropriately for suspend/resume. * FIXME: this should probably depend on which system state we're * entering - for instance, we might not want to place MFP pins in * a pull-down mode if they're an active low chip select, and we're * just entering standby. */ static int pxa3xx_mfp_suspend(void) { mfp_config_lpm(); return 0; } static void pxa3xx_mfp_resume(void) { mfp_config_run(); /* clear RDH bit when MFP settings are restored * * NOTE: the last 3 bits DxS are write-1-to-clear so carefully * preserve them here in case they will be referenced later */ ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); } #else #define pxa3xx_mfp_suspend NULL #define pxa3xx_mfp_resume NULL #endif struct syscore_ops pxa3xx_mfp_syscore_ops = { .suspend = pxa3xx_mfp_suspend, .resume = pxa3xx_mfp_resume, }; |