| Paul Walmsley | d459bfe | 2008-08-19 11:08:43 +0300 | [diff] [blame^] | 1 | /* |
| 2 | * linux/include/asm-arm/arch-omap/clockdomain.h |
| 3 | * |
| 4 | * OMAP2/3 clockdomain framework functions |
| 5 | * |
| 6 | * Copyright (C) 2008 Texas Instruments, Inc. |
| 7 | * Copyright (C) 2008 Nokia Corporation |
| 8 | * |
| 9 | * Written by Paul Walmsley |
| 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 | #ifndef __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H |
| 17 | #define __ASM_ARM_ARCH_OMAP_CLOCKDOMAIN_H |
| 18 | |
| 19 | #include <mach/powerdomain.h> |
| 20 | #include <mach/clock.h> |
| 21 | #include <mach/cpu.h> |
| 22 | |
| 23 | /* Clockdomain capability flags */ |
| 24 | #define CLKDM_CAN_FORCE_SLEEP (1 << 0) |
| 25 | #define CLKDM_CAN_FORCE_WAKEUP (1 << 1) |
| 26 | #define CLKDM_CAN_ENABLE_AUTO (1 << 2) |
| 27 | #define CLKDM_CAN_DISABLE_AUTO (1 << 3) |
| 28 | |
| 29 | #define CLKDM_CAN_HWSUP (CLKDM_CAN_ENABLE_AUTO | CLKDM_CAN_DISABLE_AUTO) |
| 30 | #define CLKDM_CAN_SWSUP (CLKDM_CAN_FORCE_SLEEP | CLKDM_CAN_FORCE_WAKEUP) |
| 31 | #define CLKDM_CAN_HWSUP_SWSUP (CLKDM_CAN_SWSUP | CLKDM_CAN_HWSUP) |
| 32 | |
| 33 | /* OMAP24XX CM_CLKSTCTRL_*.AUTOSTATE_* register bit values */ |
| 34 | #define OMAP24XX_CLKSTCTRL_DISABLE_AUTO 0x0 |
| 35 | #define OMAP24XX_CLKSTCTRL_ENABLE_AUTO 0x1 |
| 36 | |
| 37 | /* OMAP3XXX CM_CLKSTCTRL_*.CLKTRCTRL_* register bit values */ |
| 38 | #define OMAP34XX_CLKSTCTRL_DISABLE_AUTO 0x0 |
| 39 | #define OMAP34XX_CLKSTCTRL_FORCE_SLEEP 0x1 |
| 40 | #define OMAP34XX_CLKSTCTRL_FORCE_WAKEUP 0x2 |
| 41 | #define OMAP34XX_CLKSTCTRL_ENABLE_AUTO 0x3 |
| 42 | |
| 43 | /* |
| 44 | * struct clkdm_pwrdm_autodep - a powerdomain that should have wkdeps |
| 45 | * and sleepdeps added when a powerdomain should stay active in hwsup mode; |
| 46 | * and conversely, removed when the powerdomain should be allowed to go |
| 47 | * inactive in hwsup mode. |
| 48 | */ |
| 49 | struct clkdm_pwrdm_autodep { |
| 50 | |
| 51 | /* Name of the powerdomain to add a wkdep/sleepdep on */ |
| 52 | const char *pwrdm_name; |
| 53 | |
| 54 | /* Powerdomain pointer (looked up at clkdm_init() time) */ |
| 55 | struct powerdomain *pwrdm; |
| 56 | |
| 57 | /* OMAP chip types that this clockdomain dep is valid on */ |
| 58 | const struct omap_chip_id omap_chip; |
| 59 | |
| 60 | }; |
| 61 | |
| 62 | struct clockdomain { |
| 63 | |
| 64 | /* Clockdomain name */ |
| 65 | const char *name; |
| 66 | |
| 67 | /* Powerdomain enclosing this clockdomain */ |
| 68 | const char *pwrdm_name; |
| 69 | |
| 70 | /* CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg */ |
| 71 | const u16 clktrctrl_mask; |
| 72 | |
| 73 | /* Clockdomain capability flags */ |
| 74 | const u8 flags; |
| 75 | |
| 76 | /* OMAP chip types that this clockdomain is valid on */ |
| 77 | const struct omap_chip_id omap_chip; |
| 78 | |
| 79 | /* Usecount tracking */ |
| 80 | atomic_t usecount; |
| 81 | |
| 82 | /* Powerdomain pointer assigned at clkdm_register() */ |
| 83 | struct powerdomain *pwrdm; |
| 84 | |
| 85 | struct list_head node; |
| 86 | |
| 87 | }; |
| 88 | |
| 89 | void clkdm_init(struct clockdomain **clkdms, struct clkdm_pwrdm_autodep *autodeps); |
| 90 | int clkdm_register(struct clockdomain *clkdm); |
| 91 | int clkdm_unregister(struct clockdomain *clkdm); |
| 92 | struct clockdomain *clkdm_lookup(const char *name); |
| 93 | |
| 94 | int clkdm_for_each(int (*fn)(struct clockdomain *clkdm)); |
| 95 | struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm); |
| 96 | |
| 97 | void omap2_clkdm_allow_idle(struct clockdomain *clkdm); |
| 98 | void omap2_clkdm_deny_idle(struct clockdomain *clkdm); |
| 99 | |
| 100 | int omap2_clkdm_wakeup(struct clockdomain *clkdm); |
| 101 | int omap2_clkdm_sleep(struct clockdomain *clkdm); |
| 102 | |
| 103 | int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk); |
| 104 | int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk); |
| 105 | |
| 106 | #endif |