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OMAP4: clockdomain: Add wkup/sleep dependency support 

Add OMAP4 platform specific implementation to support clkdm
wkup and sleep dependencies a.k.a static dependencies.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
[paul@pwsan.com: removed comment about PRM; zero-prefixed STATICDEP
 register offset; fixed loop termination condition in
 omap4_clkdm_clear_all_wkup_sleep_deps(); thanks to Kevin Hilman for finding
 and helping fix this bug]
Cc: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Rajendra Nayak 2011-02-25 15:48:14 -07:00 committed by Paul Walmsley
parent 04eb7773d8
commit 15b08d930f
2 changed files with 61 additions and 0 deletions
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60
arch/arm/mach-omap2/clockdomain44xx.c
View File

@ -12,8 +12,60 @@
* published by the Free Software Foundation. * published by the Free Software Foundation.
*/ */
#include <linux/kernel.h>
#include "clockdomain.h" #include "clockdomain.h"
#include "cminst44xx.h" #include "cminst44xx.h"
#include "cm44xx.h"
static int omap4_clkdm_add_wkup_sleep_dep(struct clockdomain *clkdm1,
struct clockdomain *clkdm2)
{
omap4_cminst_set_inst_reg_bits((1 << clkdm2->dep_bit),
clkdm1->prcm_partition,
clkdm1->cm_inst, clkdm1->clkdm_offs +
OMAP4_CM_STATICDEP);
return 0;
}
static int omap4_clkdm_del_wkup_sleep_dep(struct clockdomain *clkdm1,
struct clockdomain *clkdm2)
{
omap4_cminst_clear_inst_reg_bits((1 << clkdm2->dep_bit),
clkdm1->prcm_partition,
clkdm1->cm_inst, clkdm1->clkdm_offs +
OMAP4_CM_STATICDEP);
return 0;
}
static int omap4_clkdm_read_wkup_sleep_dep(struct clockdomain *clkdm1,
struct clockdomain *clkdm2)
{
return omap4_cminst_read_inst_reg_bits(clkdm1->prcm_partition,
clkdm1->cm_inst, clkdm1->clkdm_offs +
OMAP4_CM_STATICDEP,
(1 << clkdm2->dep_bit));
}
static int omap4_clkdm_clear_all_wkup_sleep_deps(struct clockdomain *clkdm)
{
struct clkdm_dep *cd;
u32 mask = 0;
for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
if (!omap_chip_is(cd->omap_chip))
continue;
if (!cd->clkdm)
continue; /* only happens if data is erroneous */
mask |= 1 << cd->clkdm->dep_bit;
atomic_set(&cd->wkdep_usecount, 0);
}
omap4_cminst_clear_inst_reg_bits(mask, clkdm->prcm_partition,
clkdm->cm_inst, clkdm->clkdm_offs +
OMAP4_CM_STATICDEP);
return 0;
}
static int omap4_clkdm_sleep(struct clockdomain *clkdm) static int omap4_clkdm_sleep(struct clockdomain *clkdm)
{ {
@ -68,6 +120,14 @@ static int omap4_clkdm_clk_disable(struct clockdomain *clkdm)
} }
struct clkdm_ops omap4_clkdm_operations = { struct clkdm_ops omap4_clkdm_operations = {
.clkdm_add_wkdep = omap4_clkdm_add_wkup_sleep_dep,
.clkdm_del_wkdep = omap4_clkdm_del_wkup_sleep_dep,
.clkdm_read_wkdep = omap4_clkdm_read_wkup_sleep_dep,
.clkdm_clear_all_wkdeps = omap4_clkdm_clear_all_wkup_sleep_deps,
.clkdm_add_sleepdep = omap4_clkdm_add_wkup_sleep_dep,
.clkdm_del_sleepdep = omap4_clkdm_del_wkup_sleep_dep,
.clkdm_read_sleepdep = omap4_clkdm_read_wkup_sleep_dep,
.clkdm_clear_all_sleepdeps = omap4_clkdm_clear_all_wkup_sleep_deps,
.clkdm_sleep = omap4_clkdm_sleep, .clkdm_sleep = omap4_clkdm_sleep,
.clkdm_wakeup = omap4_clkdm_wakeup, .clkdm_wakeup = omap4_clkdm_wakeup,
.clkdm_allow_idle = omap4_clkdm_allow_idle, .clkdm_allow_idle = omap4_clkdm_allow_idle,

1
arch/arm/mach-omap2/cm44xx.h
View File

@ -21,6 +21,7 @@
#include "cm.h" #include "cm.h"
#define OMAP4_CM_CLKSTCTRL 0x0000 #define OMAP4_CM_CLKSTCTRL 0x0000
#define OMAP4_CM_STATICDEP 0x0004
/* Function prototypes */ /* Function prototypes */
# ifndef __ASSEMBLER__ # ifndef __ASSEMBLER__