diff options
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain.c | 130 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain.h | 7 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c | 13 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/clockdomains44xx_data.c | 5 |
4 files changed, 121 insertions, 34 deletions
diff --git a/arch/arm/mach-omap2/clockdomain.c b/arch/arm/mach-omap2/clockdomain.c index 8f0890685d7b..b73a1dc37dfb 100644 --- a/arch/arm/mach-omap2/clockdomain.c +++ b/arch/arm/mach-omap2/clockdomain.c @@ -257,43 +257,113 @@ static void _resolve_clkdm_deps(struct clockdomain *clkdm, /* Public functions */ /** - * clkdm_init - set up the clockdomain layer - * @clkdms: optional pointer to an array of clockdomains to register - * @init_autodeps: optional pointer to an array of autodeps to register - * @custom_funcs: func pointers for arch specific implementations - * - * Set up internal state. If a pointer to an array of clockdomains - * @clkdms was supplied, loop through the list of clockdomains, - * register all that are available on the current platform. Similarly, - * if a pointer to an array of clockdomain autodependencies - * @init_autodeps was provided, register those. No return value. + * clkdm_register_platform_funcs - register clockdomain implementation fns + * @co: func pointers for arch specific implementations + * + * Register the list of function pointers used to implement the + * clockdomain functions on different OMAP SoCs. Should be called + * before any other clkdm_register*() function. Returns -EINVAL if + * @co is null, -EEXIST if platform functions have already been + * registered, or 0 upon success. + */ +int clkdm_register_platform_funcs(struct clkdm_ops *co) +{ + if (!co) + return -EINVAL; + + if (arch_clkdm) + return -EEXIST; + + arch_clkdm = co; + + return 0; +}; + +/** + * clkdm_register_clkdms - register SoC clockdomains + * @cs: pointer to an array of struct clockdomain to register + * + * Register the clockdomains available on a particular OMAP SoC. Must + * be called after clkdm_register_platform_funcs(). May be called + * multiple times. Returns -EACCES if called before + * clkdm_register_platform_funcs(); -EINVAL if the argument @cs is + * null; or 0 upon success. */ -void clkdm_init(struct clockdomain **clkdms, - struct clkdm_autodep *init_autodeps, - struct clkdm_ops *custom_funcs) +int clkdm_register_clkdms(struct clockdomain **cs) { struct clockdomain **c = NULL; - struct clockdomain *clkdm; - struct clkdm_autodep *autodep = NULL; - if (!custom_funcs) - WARN(1, "No custom clkdm functions registered\n"); - else - arch_clkdm = custom_funcs; + if (!arch_clkdm) + return -EACCES; + + if (!cs) + return -EINVAL; + + for (c = cs; *c; c++) + _clkdm_register(*c); - if (clkdms) - for (c = clkdms; *c; c++) - _clkdm_register(*c); + return 0; +} + +/** + * clkdm_register_autodeps - register autodeps (if required) + * @ia: pointer to a static array of struct clkdm_autodep to register + * + * Register clockdomain "automatic dependencies." These are + * clockdomain wakeup and sleep dependencies that are automatically + * added whenever the first clock inside a clockdomain is enabled, and + * removed whenever the last clock inside a clockdomain is disabled. + * These are currently only used on OMAP3 devices, and are deprecated, + * since they waste energy. However, until the OMAP2/3 IP block + * enable/disable sequence can be converted to match the OMAP4 + * sequence, they are needed. + * + * Must be called only after all of the SoC clockdomains are + * registered, since the function will resolve autodep clockdomain + * names into clockdomain pointers. + * + * The struct clkdm_autodep @ia array must be static, as this function + * does not copy the array elements. + * + * Returns -EACCES if called before any clockdomains have been + * registered, -EINVAL if called with a null @ia argument, -EEXIST if + * autodeps have already been registered, or 0 upon success. + */ +int clkdm_register_autodeps(struct clkdm_autodep *ia) +{ + struct clkdm_autodep *a = NULL; + + if (list_empty(&clkdm_list)) + return -EACCES; + + if (!ia) + return -EINVAL; - autodeps = init_autodeps; if (autodeps) - for (autodep = autodeps; autodep->clkdm.ptr; autodep++) - _autodep_lookup(autodep); + return -EEXIST; + + autodeps = ia; + for (a = autodeps; a->clkdm.ptr; a++) + _autodep_lookup(a); + + return 0; +} + +/** + * clkdm_complete_init - set up the clockdomain layer + * + * Put all clockdomains into software-supervised mode; PM code should + * later enable hardware-supervised mode as appropriate. Must be + * called after clkdm_register_clkdms(). Returns -EACCES if called + * before clkdm_register_clkdms(), or 0 upon success. + */ +int clkdm_complete_init(void) +{ + struct clockdomain *clkdm; + + if (list_empty(&clkdm_list)) + return -EACCES; - /* - * Put all clockdomains into software-supervised mode; PM code - * should later enable hardware-supervised mode as appropriate - */ list_for_each_entry(clkdm, &clkdm_list, node) { if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP) clkdm_wakeup(clkdm); @@ -306,6 +376,8 @@ void clkdm_init(struct clockdomain **clkdms, _resolve_clkdm_deps(clkdm, clkdm->sleepdep_srcs); clkdm_clear_all_sleepdeps(clkdm); } + + return 0; } /** diff --git a/arch/arm/mach-omap2/clockdomain.h b/arch/arm/mach-omap2/clockdomain.h index 1e50c88b8a07..0d879ff490d1 100644 --- a/arch/arm/mach-omap2/clockdomain.h +++ b/arch/arm/mach-omap2/clockdomain.h @@ -166,8 +166,11 @@ struct clkdm_ops { int (*clkdm_clk_disable)(struct clockdomain *clkdm); }; -void clkdm_init(struct clockdomain **clkdms, struct clkdm_autodep *autodeps, - struct clkdm_ops *custom_funcs); +int clkdm_register_platform_funcs(struct clkdm_ops *co); +int clkdm_register_autodeps(struct clkdm_autodep *ia); +int clkdm_register_clkdms(struct clockdomain **c); +int clkdm_complete_init(void); + struct clockdomain *clkdm_lookup(const char *name); int clkdm_for_each(int (*fn)(struct clockdomain *clkdm, void *user), diff --git a/arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c b/arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c index 13bde95b6790..148a3e84162c 100644 --- a/arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c +++ b/arch/arm/mach-omap2/clockdomains2xxx_3xxx_data.c @@ -857,12 +857,21 @@ static struct clockdomain *clockdomains_omap2[] __initdata = { NULL, }; +static void __init omap2_3_clockdomains_init(void) +{ + clkdm_register_clkdms(clockdomains_omap2); + clkdm_register_autodeps(clkdm_autodeps); + clkdm_complete_init(); +} + void __init omap2xxx_clockdomains_init(void) { - clkdm_init(clockdomains_omap2, clkdm_autodeps, &omap2_clkdm_operations); + clkdm_register_platform_funcs(&omap2_clkdm_operations); + omap2_3_clockdomains_init(); } void __init omap3xxx_clockdomains_init(void) { - clkdm_init(clockdomains_omap2, clkdm_autodeps, &omap3_clkdm_operations); + clkdm_register_platform_funcs(&omap3_clkdm_operations); + omap2_3_clockdomains_init(); } diff --git a/arch/arm/mach-omap2/clockdomains44xx_data.c b/arch/arm/mach-omap2/clockdomains44xx_data.c index dccc651fa0d0..c75411a62207 100644 --- a/arch/arm/mach-omap2/clockdomains44xx_data.c +++ b/arch/arm/mach-omap2/clockdomains44xx_data.c @@ -685,7 +685,10 @@ static struct clockdomain *clockdomains_omap44xx[] __initdata = { NULL }; + void __init omap44xx_clockdomains_init(void) { - clkdm_init(clockdomains_omap44xx, NULL, &omap4_clkdm_operations); + clkdm_register_platform_funcs(&omap4_clkdm_operations); + clkdm_register_clkdms(clockdomains_omap44xx); + clkdm_complete_init(); } |
