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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
2c8086a5 | 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 | * | |
e9bba8ee | 9 | * 2007-08-21: eric miao <eric.miao@marvell.com> |
2c8086a5 | 10 | * initial version |
2c8086a5 | 11 | */ |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/kernel.h> | |
15 | #include <linux/init.h> | |
16 | #include <linux/io.h> | |
2eaa03b5 | 17 | #include <linux/syscore_ops.h> |
2c8086a5 | 18 | |
a09e64fb | 19 | #include <mach/hardware.h> |
4c25c5d2 | 20 | #include "mfp-pxa3xx.h" |
a09e64fb | 21 | #include <mach/pxa3xx-regs.h> |
2c8086a5 | 22 | |
d4fc858f RK |
23 | #ifdef CONFIG_PM |
24 | /* | |
25 | * Configure the MFPs appropriately for suspend/resume. | |
26 | * FIXME: this should probably depend on which system state we're | |
27 | * entering - for instance, we might not want to place MFP pins in | |
28 | * a pull-down mode if they're an active low chip select, and we're | |
29 | * just entering standby. | |
30 | */ | |
2eaa03b5 | 31 | static int pxa3xx_mfp_suspend(void) |
d4fc858f | 32 | { |
f8dec04d | 33 | mfp_config_lpm(); |
d4fc858f RK |
34 | return 0; |
35 | } | |
36 | ||
2eaa03b5 | 37 | static void pxa3xx_mfp_resume(void) |
d4fc858f | 38 | { |
f8dec04d | 39 | mfp_config_run(); |
c4d1fb62 | 40 | |
41 | /* clear RDH bit when MFP settings are restored | |
42 | * | |
43 | * NOTE: the last 3 bits DxS are write-1-to-clear so carefully | |
44 | * preserve them here in case they will be referenced later | |
45 | */ | |
46 | ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); | |
d4fc858f | 47 | } |
4be35e23 | 48 | #else |
49 | #define pxa3xx_mfp_suspend NULL | |
50 | #define pxa3xx_mfp_resume NULL | |
51 | #endif | |
d4fc858f | 52 | |
2eaa03b5 | 53 | struct syscore_ops pxa3xx_mfp_syscore_ops = { |
d4fc858f | 54 | .suspend = pxa3xx_mfp_suspend, |
2eaa03b5 | 55 | .resume = pxa3xx_mfp_resume, |
d4fc858f | 56 | }; |