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56 lines
1.3 KiB
56 lines
1.3 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* linux/arch/arm/mach-pxa/mfp.c |
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* |
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* PXA3xx Multi-Function Pin Support |
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* |
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* Copyright (C) 2007 Marvell Internation Ltd. |
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* |
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* 2007-08-21: eric miao <[email protected]> |
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* initial version |
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*/ |
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#include <linux/module.h> |
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#include <linux/kernel.h> |
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#include <linux/init.h> |
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#include <linux/io.h> |
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#include <linux/syscore_ops.h> |
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#include <mach/hardware.h> |
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#include "mfp-pxa3xx.h" |
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#include <mach/pxa3xx-regs.h> |
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#ifdef CONFIG_PM |
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/* |
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* Configure the MFPs appropriately for suspend/resume. |
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* FIXME: this should probably depend on which system state we're |
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* entering - for instance, we might not want to place MFP pins in |
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* a pull-down mode if they're an active low chip select, and we're |
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* just entering standby. |
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*/ |
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static int pxa3xx_mfp_suspend(void) |
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{ |
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mfp_config_lpm(); |
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return 0; |
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} |
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static void pxa3xx_mfp_resume(void) |
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{ |
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mfp_config_run(); |
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/* clear RDH bit when MFP settings are restored |
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* |
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* NOTE: the last 3 bits DxS are write-1-to-clear so carefully |
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* preserve them here in case they will be referenced later |
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*/ |
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ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); |
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} |
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#else |
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#define pxa3xx_mfp_suspend NULL |
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#define pxa3xx_mfp_resume NULL |
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#endif |
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struct syscore_ops pxa3xx_mfp_syscore_ops = { |
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.suspend = pxa3xx_mfp_suspend, |
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.resume = pxa3xx_mfp_resume, |
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};
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