lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

OMAP2+: clockdomain: add clkdm_in_hwsup()

Browse Source 
Add a new function, clkdm_in_hwsup(), that returns true if a clockdomain
is configured for hardware-supervised idle.  It does not actually read the
hardware; rather, it checks an internal flag in the struct clockdomain, which
is changed when the clockdomain is switched in and out of hardware-supervised
idle.  This should be safe, since all changes to the idle mode should
pass through the clockdomain code.

Based on a set of patches by Rajendra Nayak <rnayak@ti.com> which do
the same thing by checking the hardware bits.  This approach should be
faster and more compact.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Rajendra Nayak <rnayak@ti.com>
Cc: Todd Poynor <toddpoynor@google.com>
Cc: Benoît Cousson <b-cousson@ti.com>
This commit is contained in:
Paul Walmsley
2011-07-10 05:56:54 -06:00
parent 113a74137f
commit 32a363c0f5
2 changed files with 34 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
arch/arm/mach-omap2/clockdomain.h
View File

@@ -83,6 +83,9 @@ struct clkdm_dep {
const struct omap_chip_id omap_chip;
};
/* Possible flags for struct clockdomain._flags */
#define _CLKDM_FLAG_HWSUP_ENABLED BIT(0)
/**
* struct clockdomain - OMAP clockdomain
* @name: clockdomain name
@@ -90,6 +93,7 @@ struct clkdm_dep {
* @clktrctrl_reg: CLKSTCTRL reg for the given clock domain
* @clktrctrl_mask: CLKTRCTRL/AUTOSTATE field mask in CM_CLKSTCTRL reg
* @flags: Clockdomain capability flags
* @_flags: Flags for use only by internal clockdomain code
* @dep_bit: Bit shift of this clockdomain's PM_WKDEP/CM_SLEEPDEP bit
* @prcm_partition: (OMAP4 only) PRCM partition ID for this clkdm's registers
* @cm_inst: (OMAP4 only) CM instance register offset
@@ -114,6 +118,7 @@ struct clockdomain {
} pwrdm;
const u16 clktrctrl_mask;
const u8 flags;
u8 _flags;
const u8 dep_bit;
const u8 prcm_partition;
const s16 cm_inst;
@@ -178,6 +183,7 @@ int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm);
void clkdm_allow_idle(struct clockdomain *clkdm);
void clkdm_deny_idle(struct clockdomain *clkdm);
bool clkdm_in_hwsup(struct clockdomain *clkdm);
int clkdm_wakeup(struct clockdomain *clkdm);
int clkdm_sleep(struct clockdomain *clkdm);