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author | Paul Walmsley <paul@pwsan.com> | 2011-09-14 22:01:21 (GMT) |
---|---|---|
committer | Paul Walmsley <paul@pwsan.com> | 2011-09-14 23:20:44 (GMT) |
commit | 129c65ee66a97fbf663f2f5fce26aacdc7348736 (patch) | |
tree | 50c732a7a31d8443212d95a428515952c839592f /arch/arm/mach-omap2 | |
parent | a5ffef6af127721a813d70f87cd8cc348ea9d6ab (diff) | |
download | linux-fsl-qoriq-129c65ee66a97fbf663f2f5fce26aacdc7348736.tar.xz |
OMAP: powerdomain: split pwrdm_init() into two functions
In preparation for OMAP_CHIP() removal, split pwrdm_init() into three
functions. This allows some of them to be called multiple times: for
example, pwrdm_register_pwrdms() can be called once to register
powerdomains that are common to a group of SoCs, and once to register
powerdomains that are specific to a single SoC.
The appropriate order to call these functions - which is enforced
by the code - is:
1. pwrdm_register_platform_funcs()
2. pwrdm_register_pwrdms() (can be called multiple times)
3. pwrdm_complete_init()
Convert the OMAP2, 3, and 4 powerdomain init code to use these new
functions.
While here, improve documentation, and increase CodingStyle
conformance by shortening some local variable names.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Diffstat (limited to 'arch/arm/mach-omap2')
-rw-r--r-- | arch/arm/mach-omap2/powerdomain.c | 84 | ||||
-rw-r--r-- | arch/arm/mach-omap2/powerdomain.h | 4 | ||||
-rw-r--r-- | arch/arm/mach-omap2/powerdomains2xxx_data.c | 4 | ||||
-rw-r--r-- | arch/arm/mach-omap2/powerdomains3xxx_data.c | 4 | ||||
-rw-r--r-- | arch/arm/mach-omap2/powerdomains44xx_data.c | 4 |
5 files changed, 74 insertions, 26 deletions
diff --git a/arch/arm/mach-omap2/powerdomain.c b/arch/arm/mach-omap2/powerdomain.c index ef71fdd..3483537 100644 --- a/arch/arm/mach-omap2/powerdomain.c +++ b/arch/arm/mach-omap2/powerdomain.c @@ -1,7 +1,7 @@ /* * OMAP powerdomain control * - * Copyright (C) 2007-2008 Texas Instruments, Inc. + * Copyright (C) 2007-2008, 2011 Texas Instruments, Inc. * Copyright (C) 2007-2011 Nokia Corporation * * Written by Paul Walmsley @@ -194,36 +194,76 @@ static int _pwrdm_post_transition_cb(struct powerdomain *pwrdm, void *unused) /* Public functions */ /** - * pwrdm_init - set up the powerdomain layer - * @pwrdms: array of struct powerdomain pointers to register - * @custom_funcs: func pointers for arch specific implementations + * pwrdm_register_platform_funcs - register powerdomain implementation fns + * @po: func pointers for arch specific implementations * - * Loop through the array of powerdomains @pwrdms, registering all - * that are available on the current CPU. Also, program all - * powerdomain target state as ON; this is to prevent domains from - * hitting low power states (if bootloader has target states set to - * something other than ON) and potentially even losing context while - * PM is not fully initialized. The PM late init code can then program - * the desired target state for all the power domains. No return - * value. + * Register the list of function pointers used to implement the + * powerdomain functions on different OMAP SoCs. Should be called + * before any other pwrdm_register*() function. Returns -EINVAL if + * @po is null, -EEXIST if platform functions have already been + * registered, or 0 upon success. */ -void pwrdm_init(struct powerdomain **pwrdms, struct pwrdm_ops *custom_funcs) +int pwrdm_register_platform_funcs(struct pwrdm_ops *po) +{ + if (!po) + return -EINVAL; + + if (arch_pwrdm) + return -EEXIST; + + arch_pwrdm = po; + + return 0; +} + +/** + * pwrdm_register_pwrdms - register SoC powerdomains + * @ps: pointer to an array of struct powerdomain to register + * + * Register the powerdomains available on a particular OMAP SoC. Must + * be called after pwrdm_register_platform_funcs(). May be called + * multiple times. Returns -EACCES if called before + * pwrdm_register_platform_funcs(); -EINVAL if the argument @ps is + * null; or 0 upon success. + */ +int pwrdm_register_pwrdms(struct powerdomain **ps) { struct powerdomain **p = NULL; - struct powerdomain *temp_p; - if (!custom_funcs) - WARN(1, "powerdomain: No custom pwrdm functions registered\n"); - else - arch_pwrdm = custom_funcs; + if (!arch_pwrdm) + return -EEXIST; - if (pwrdms) { - for (p = pwrdms; *p; p++) - _pwrdm_register(*p); - } + if (!ps) + return -EINVAL; + + for (p = ps; *p; p++) + _pwrdm_register(*p); + + return 0; +} + +/** + * pwrdm_complete_init - set up the powerdomain layer + * + * Do whatever is necessary to initialize registered powerdomains and + * powerdomain code. Currently, this programs the next power state + * for each powerdomain to ON. This prevents powerdomains from + * unexpectedly losing context or entering high wakeup latency modes + * with non-power-management-enabled kernels. Must be called after + * pwrdm_register_pwrdms(). Returns -EACCES if called before + * pwrdm_register_pwrdms(), or 0 upon success. + */ +int pwrdm_complete_init(void) +{ + struct powerdomain *temp_p; + + if (list_empty(&pwrdm_list)) + return -EACCES; list_for_each_entry(temp_p, &pwrdm_list, node) pwrdm_set_next_pwrst(temp_p, PWRDM_POWER_ON); + + return 0; } /** diff --git a/arch/arm/mach-omap2/powerdomain.h b/arch/arm/mach-omap2/powerdomain.h index d23d979..489e1c5 100644 --- a/arch/arm/mach-omap2/powerdomain.h +++ b/arch/arm/mach-omap2/powerdomain.h @@ -162,7 +162,9 @@ struct pwrdm_ops { int (*pwrdm_wait_transition)(struct powerdomain *pwrdm); }; -void pwrdm_init(struct powerdomain **pwrdm_list, struct pwrdm_ops *custom_funcs); +int pwrdm_register_platform_funcs(struct pwrdm_ops *custom_funcs); +int pwrdm_register_pwrdms(struct powerdomain **pwrdm_list); +int pwrdm_complete_init(void); struct powerdomain *pwrdm_lookup(const char *name); diff --git a/arch/arm/mach-omap2/powerdomains2xxx_data.c b/arch/arm/mach-omap2/powerdomains2xxx_data.c index cc389fb..71c4fd7 100644 --- a/arch/arm/mach-omap2/powerdomains2xxx_data.c +++ b/arch/arm/mach-omap2/powerdomains2xxx_data.c @@ -119,5 +119,7 @@ static struct powerdomain *powerdomains_omap2xxx[] __initdata = { void __init omap2xxx_powerdomains_init(void) { - pwrdm_init(powerdomains_omap2xxx, &omap2_pwrdm_operations); + pwrdm_register_platform_funcs(&omap2_pwrdm_operations); + pwrdm_register_pwrdms(powerdomains_omap2xxx); + pwrdm_complete_init(); } diff --git a/arch/arm/mach-omap2/powerdomains3xxx_data.c b/arch/arm/mach-omap2/powerdomains3xxx_data.c index 469a920..9d355fc 100644 --- a/arch/arm/mach-omap2/powerdomains3xxx_data.c +++ b/arch/arm/mach-omap2/powerdomains3xxx_data.c @@ -283,5 +283,7 @@ static struct powerdomain *powerdomains_omap3xxx[] __initdata = { void __init omap3xxx_powerdomains_init(void) { - pwrdm_init(powerdomains_omap3xxx, &omap3_pwrdm_operations); + pwrdm_register_platform_funcs(&omap3_pwrdm_operations); + pwrdm_register_pwrdms(powerdomains_omap3xxx); + pwrdm_complete_init(); } diff --git a/arch/arm/mach-omap2/powerdomains44xx_data.c b/arch/arm/mach-omap2/powerdomains44xx_data.c index 247e794..67ac24b 100644 --- a/arch/arm/mach-omap2/powerdomains44xx_data.c +++ b/arch/arm/mach-omap2/powerdomains44xx_data.c @@ -352,5 +352,7 @@ static struct powerdomain *powerdomains_omap44xx[] __initdata = { void __init omap44xx_powerdomains_init(void) { - pwrdm_init(powerdomains_omap44xx, &omap4_pwrdm_operations); + pwrdm_register_platform_funcs(&omap4_pwrdm_operations); + pwrdm_register_pwrdms(powerdomains_omap44xx); + pwrdm_complete_init(); } |