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ARM: OMAP2+: powerdomain/clockdomain: add a per-powerdomain spinlock

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Add a per-powerdomain spinlock.  Use that instead of the clockdomain
spinlock.  Add pwrdm_lock()/pwrdm_unlock() functions to allow other
code to acquire or release the powerdomain spinlock without reaching
directly into the struct powerdomain.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Jean Pihet <jean.pihet@newoldbits.com>
This commit is contained in:
Paul Walmsley
2013-01-26 00:58:16 -07:00
parent c4978fba6b
commit 3a09028405
4 changed files with 176 additions and 73 deletions
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11
arch/arm/mach-omap2/powerdomain.h
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@@ -19,8 +19,7 @@
#include <linux/types.h>
#include <linux/list.h>
#include <linux/atomic.h>
#include <linux/spinlock.h>
#include "voltage.h"
@@ -103,6 +102,8 @@ struct powerdomain;
* @state_counter:
* @timer:
* @state_timer:
* @_lock: spinlock used to serialize powerdomain and some clockdomain ops
* @_lock_flags: stored flags when @_lock is taken
*
* @prcm_partition possible values are defined in mach-omap2/prcm44xx.h.
*/
@@ -127,7 +128,8 @@ struct powerdomain {
unsigned state_counter[PWRDM_MAX_PWRSTS];
unsigned ret_logic_off_counter;
unsigned ret_mem_off_counter[PWRDM_MAX_MEM_BANKS];
spinlock_t _lock;
unsigned long _lock_flags;
const u8 pwrstctrl_offs;
const u8 pwrstst_offs;
const u32 logicretstate_mask;
@@ -235,6 +237,7 @@ int pwrdm_enable_hdwr_sar(struct powerdomain *pwrdm);
int pwrdm_disable_hdwr_sar(struct powerdomain *pwrdm);
bool pwrdm_has_hdwr_sar(struct powerdomain *pwrdm);
int pwrdm_state_switch_nolock(struct powerdomain *pwrdm);
int pwrdm_state_switch(struct powerdomain *pwrdm);
int pwrdm_pre_transition(struct powerdomain *pwrdm);
int pwrdm_post_transition(struct powerdomain *pwrdm);
@@ -262,5 +265,7 @@ extern u32 omap2_pwrdm_get_mem_bank_stst_mask(u8 bank);
extern struct powerdomain wkup_omap2_pwrdm;
extern struct powerdomain gfx_omap2_pwrdm;
extern void pwrdm_lock(struct powerdomain *pwrdm);
extern void pwrdm_unlock(struct powerdomain *pwrdm);
#endif