mfp-pxa3xx.c (1300B)
1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * linux/arch/arm/mach-pxa/mfp.c 4 * 5 * PXA3xx Multi-Function Pin Support 6 * 7 * Copyright (C) 2007 Marvell Internation Ltd. 8 * 9 * 2007-08-21: eric miao <eric.miao@marvell.com> 10 * initial version 11 */ 12 13#include <linux/module.h> 14#include <linux/kernel.h> 15#include <linux/init.h> 16#include <linux/io.h> 17#include <linux/syscore_ops.h> 18 19#include "mfp-pxa3xx.h" 20#include "pxa3xx-regs.h" 21 22#ifdef CONFIG_PM 23/* 24 * Configure the MFPs appropriately for suspend/resume. 25 * FIXME: this should probably depend on which system state we're 26 * entering - for instance, we might not want to place MFP pins in 27 * a pull-down mode if they're an active low chip select, and we're 28 * just entering standby. 29 */ 30static int pxa3xx_mfp_suspend(void) 31{ 32 mfp_config_lpm(); 33 return 0; 34} 35 36static void pxa3xx_mfp_resume(void) 37{ 38 mfp_config_run(); 39 40 /* clear RDH bit when MFP settings are restored 41 * 42 * NOTE: the last 3 bits DxS are write-1-to-clear so carefully 43 * preserve them here in case they will be referenced later 44 */ 45 ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); 46} 47#else 48#define pxa3xx_mfp_suspend NULL 49#define pxa3xx_mfp_resume NULL 50#endif 51 52struct syscore_ops pxa3xx_mfp_syscore_ops = { 53 .suspend = pxa3xx_mfp_suspend, 54 .resume = pxa3xx_mfp_resume, 55};