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OMAP2+: hwmod: add postsetup state

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Allow board files and OMAP core code to control the state that some or
all of the hwmods end up in at the end of _setup() (called by
omap_hwmod_late_init() ).  Reimplement the old skip_setup_idle code in
terms of this new postsetup state code.

There are two use-cases for this patch: the !CONFIG_PM_RUNTIME case,
in which all IP blocks should stay enabled after _setup() finishes;
and the MPU watchdog case, in which the watchdog IP block should enter
idle if watchdog coverage of kernel initialization is desired, and
should be disabled otherwise.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Cc: Charulatha Varadarajan <charu@ti.com>
This commit is contained in:
Paul Walmsley 2010-12-14 12:42:35 -07:00
parent e4dc8f507c
commit 2092e5ccf8
3 changed files with 88 additions and 32 deletions
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6
arch/arm/plat-omap/include/plat/omap_hwmod.h
View file

@ -462,6 +462,7 @@ struct omap_hwmod_class {
* @response_lat: device OCP response latency (in interface clock cycles)
* @_int_flags: internal-use hwmod flags
* @_state: internal-use hwmod state
* @_postsetup_state: internal-use state to leave the hwmod in after _setup()
* @flags: hwmod flags (documented below)
* @omap_chip: OMAP chips this hwmod is present on
* @_mutex: mutex serializing operations on this hwmod
@ -510,6 +511,7 @@ struct omap_hwmod {
u8 hwmods_cnt;
u8 _int_flags;
u8 _state;
u8 _postsetup_state;
const struct omap_chip_id omap_chip;
};
@ -519,7 +521,7 @@ int omap_hwmod_unregister(struct omap_hwmod *oh);
struct omap_hwmod *omap_hwmod_lookup(const char *name);
int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
void *data);
int omap_hwmod_late_init(u8 skip_setup_idle);
int omap_hwmod_late_init(void);
int omap_hwmod_enable(struct omap_hwmod *oh);
int _omap_hwmod_enable(struct omap_hwmod *oh);
@ -566,6 +568,8 @@ int omap_hwmod_for_each_by_class(const char *classname,
void *user),
void *user);
int omap_hwmod_set_postsetup_state(struct omap_hwmod *oh, u8 state);
/*
* Chip variant-specific hwmod init routines - XXX should be converted
* to use initcalls once the initial boot ordering is straightened out