60 lines
1.5 KiB
C
60 lines
1.5 KiB
C
|
/*
|
||
|
|
* 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 <mach/mfp-pxa3xx.h>
|
||
|
|
#include <mach/pxa3xx-regs.h>
|
||
|
|
|
||
|
|
#ifdef CONFIG_PM
|
||
|
|
/*
|
||
|
|
* 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,
|
||
|
|
};
|