projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 2c8086a5 | 1 | /* |
| 2 | * linux/arch/arm/mach-pxa/mfp.c | |
| 3 | * | |
| 4 | * PXA3xx Multi-Function Pin Support | |
| 5 | * | |
| 6 | * Copyright (C) 2007 Marvell Internation Ltd. | |
| 7 | * | |
| e9bba8ee | 8 | * 2007-08-21: eric miao <eric.miao@marvell.com> |
| 2c8086a5 | 9 | * initial version |
| 10 | * | |
| 11 | * This program is free software; you can redistribute it and/or modify | |
| 12 | * it under the terms of the GNU General Public License version 2 as | |
| 13 | * published by the Free Software Foundation. | |
| 14 | */ | |
| 15 | ||
| 16 | #include <linux/module.h> | |
| 17 | #include <linux/kernel.h> | |
| 18 | #include <linux/init.h> | |
| 19 | #include <linux/io.h> | |
| 2eaa03b5 | 20 | #include <linux/syscore_ops.h> |
| 2c8086a5 | 21 | |
| a09e64fb | 22 | #include <mach/hardware.h> |
| a09e64fb RK |
23 | #include <mach/mfp-pxa3xx.h> |
| 24 | #include <mach/pxa3xx-regs.h> | |
| 2c8086a5 | 25 | |
| d4fc858f RK |
26 | #ifdef CONFIG_PM |
| 27 | /* | |
| 28 | * Configure the MFPs appropriately for suspend/resume. | |
| 29 | * FIXME: this should probably depend on which system state we're | |
| 30 | * entering - for instance, we might not want to place MFP pins in | |
| 31 | * a pull-down mode if they're an active low chip select, and we're | |
| 32 | * just entering standby. | |
| 33 | */ | |
| 2eaa03b5 | 34 | static int pxa3xx_mfp_suspend(void) |
| d4fc858f | 35 | { |
| f8dec04d | 36 | mfp_config_lpm(); |
| d4fc858f RK |
37 | return 0; |
| 38 | } | |
| 39 | ||
| 2eaa03b5 | 40 | static void pxa3xx_mfp_resume(void) |
| d4fc858f | 41 | { |
| f8dec04d | 42 | mfp_config_run(); |
| c4d1fb62 | 43 | |
| 44 | /* clear RDH bit when MFP settings are restored | |
| 45 | * | |
| 46 | * NOTE: the last 3 bits DxS are write-1-to-clear so carefully | |
| 47 | * preserve them here in case they will be referenced later | |
| 48 | */ | |
| 49 | ASCR &= ~(ASCR_RDH | ASCR_D1S | ASCR_D2S | ASCR_D3S); | |
| d4fc858f | 50 | } |
| 4be35e23 | 51 | #else |
| 52 | #define pxa3xx_mfp_suspend NULL | |
| 53 | #define pxa3xx_mfp_resume NULL | |
| 54 | #endif | |
| d4fc858f | 55 | |
| 2eaa03b5 | 56 | struct syscore_ops pxa3xx_mfp_syscore_ops = { |
| d4fc858f | 57 | .suspend = pxa3xx_mfp_suspend, |
| 2eaa03b5 | 58 | .resume = pxa3xx_mfp_resume, |
| d4fc858f | 59 | }; |