diff options
Diffstat (limited to 'arch/arm/plat-omap')
| -rw-r--r-- | arch/arm/plat-omap/Kconfig | 12 | ||||
| -rw-r--r-- | arch/arm/plat-omap/include/mach/powerdomain.h | 139 |
2 files changed, 151 insertions, 0 deletions
diff --git a/arch/arm/plat-omap/Kconfig b/arch/arm/plat-omap/Kconfig index b917206ee906..e815fa35f7f4 100644 --- a/arch/arm/plat-omap/Kconfig +++ b/arch/arm/plat-omap/Kconfig @@ -29,6 +29,18 @@ config OMAP_DEBUG_LEDS depends on OMAP_DEBUG_DEVICES default y if LEDS || LEDS_OMAP_DEBUG +config OMAP_DEBUG_POWERDOMAIN + bool "Emit debug messages from powerdomain layer" + depends on ARCH_OMAP2 || ARCH_OMAP3 + default n + help + Say Y here if you want to compile in powerdomain layer + debugging messages for OMAP2/3. These messages can + provide more detail as to why some powerdomain calls + may be failing, and will also emit a descriptive message + for every powerdomain register write. However, the + extra detail costs some memory. + config OMAP_RESET_CLOCKS bool "Reset unused clocks during boot" depends on ARCH_OMAP diff --git a/arch/arm/plat-omap/include/mach/powerdomain.h b/arch/arm/plat-omap/include/mach/powerdomain.h new file mode 100644 index 000000000000..c8f52c6f8b7e --- /dev/null +++ b/arch/arm/plat-omap/include/mach/powerdomain.h @@ -0,0 +1,139 @@ +/* + * OMAP2/3 powerdomain control + * + * Copyright (C) 2007-8 Texas Instruments, Inc. + * Copyright (C) 2007-8 Nokia Corporation + * + * Written by Paul Walmsley + * + * 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. + */ + +#ifndef ASM_ARM_ARCH_OMAP_POWERDOMAIN +#define ASM_ARM_ARCH_OMAP_POWERDOMAIN + +#include <linux/types.h> +#include <linux/list.h> + +#include <asm/atomic.h> + +#include <mach/cpu.h> + + +/* Powerdomain basic power states */ +#define PWRDM_POWER_OFF 0x0 +#define PWRDM_POWER_RET 0x1 +#define PWRDM_POWER_INACTIVE 0x2 +#define PWRDM_POWER_ON 0x3 + +/* Powerdomain allowable state bitfields */ +#define PWRSTS_OFF_ON ((1 << PWRDM_POWER_OFF) | \ + (1 << PWRDM_POWER_ON)) + +#define PWRSTS_OFF_RET ((1 << PWRDM_POWER_OFF) | \ + (1 << PWRDM_POWER_RET)) + +#define PWRSTS_OFF_RET_ON (PWRSTS_OFF_RET | (1 << PWRDM_POWER_ON)) + + +/* + * Number of memory banks that are power-controllable. On OMAP3430, the + * maximum is 4. + */ +#define PWRDM_MAX_MEM_BANKS 4 + +/* XXX A completely arbitrary number. What is reasonable here? */ +#define PWRDM_TRANSITION_BAILOUT 100000 + +struct powerdomain; + +/* Encodes dependencies between powerdomains - statically defined */ +struct pwrdm_dep { + + /* Powerdomain name */ + const char *pwrdm_name; + + /* Powerdomain pointer - resolved by the powerdomain code */ + struct powerdomain *pwrdm; + + /* Flags to mark OMAP chip restrictions, etc. */ + const struct omap_chip_id omap_chip; + +}; + +struct powerdomain { + + /* Powerdomain name */ + const char *name; + + /* the address offset from CM_BASE/PRM_BASE */ + const s16 prcm_offs; + + /* Used to represent the OMAP chip types containing this pwrdm */ + const struct omap_chip_id omap_chip; + + /* Bit shift of this powerdomain's PM_WKDEP/CM_SLEEPDEP bit */ + const u8 dep_bit; + + /* Powerdomains that can be told to wake this powerdomain up */ + struct pwrdm_dep *wkdep_srcs; + + /* Powerdomains that can be told to keep this pwrdm from inactivity */ + struct pwrdm_dep *sleepdep_srcs; + + /* Possible powerdomain power states */ + const u8 pwrsts; + + /* Possible logic power states when pwrdm in RETENTION */ + const u8 pwrsts_logic_ret; + + /* Number of software-controllable memory banks in this powerdomain */ + const u8 banks; + + /* Possible memory bank pwrstates when pwrdm in RETENTION */ + const u8 pwrsts_mem_ret[PWRDM_MAX_MEM_BANKS]; + + /* Possible memory bank pwrstates when pwrdm is ON */ + const u8 pwrsts_mem_on[PWRDM_MAX_MEM_BANKS]; + + struct list_head node; + +}; + + +void pwrdm_init(struct powerdomain **pwrdm_list); + +int pwrdm_register(struct powerdomain *pwrdm); +int pwrdm_unregister(struct powerdomain *pwrdm); +struct powerdomain *pwrdm_lookup(const char *name); + +int pwrdm_for_each(int (*fn)(struct powerdomain *pwrdm)); + +int pwrdm_add_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2); +int pwrdm_del_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2); +int pwrdm_read_wkdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2); +int pwrdm_add_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2); +int pwrdm_del_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2); +int pwrdm_read_sleepdep(struct powerdomain *pwrdm1, struct powerdomain *pwrdm2); + +int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm); + +int pwrdm_set_next_pwrst(struct powerdomain *pwrdm, u8 pwrst); +int pwrdm_read_next_pwrst(struct powerdomain *pwrdm); +int pwrdm_read_prev_pwrst(struct powerdomain *pwrdm); +int pwrdm_clear_all_prev_pwrst(struct powerdomain *pwrdm); + +int pwrdm_set_logic_retst(struct powerdomain *pwrdm, u8 pwrst); +int pwrdm_set_mem_onst(struct powerdomain *pwrdm, u8 bank, u8 pwrst); +int pwrdm_set_mem_retst(struct powerdomain *pwrdm, u8 bank, u8 pwrst); + +int pwrdm_read_logic_pwrst(struct powerdomain *pwrdm); +int pwrdm_read_prev_logic_pwrst(struct powerdomain *pwrdm); +int pwrdm_read_mem_pwrst(struct powerdomain *pwrdm, u8 bank); +int pwrdm_read_prev_mem_pwrst(struct powerdomain *pwrdm, u8 bank); + +int pwrdm_wait_transition(struct powerdomain *pwrdm); + +#endif |