diff options
| author | Rajendra Nayak <rnayak@ti.com> | 2011-02-25 15:48:14 -0700 |
|---|---|---|
| committer | Paul Walmsley <paul@pwsan.com> | 2011-02-25 16:09:05 -0700 |
| commit | 15b08d930f0b1a65a20e042046bd99ed7f75556b (patch) | |
| tree | 97a71d0a9fb4712b0e952ec51fec351aa381411a /arch | |
| parent | 04eb7773d803bd0a8249c5bba37f81c496253ea1 (diff) | |
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>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/mach-omap2/clockdomain44xx.c | 60 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/cm44xx.h | 1 |
2 files changed, 61 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/clockdomain44xx.c b/arch/arm/mach-omap2/clockdomain44xx.c index c0ccc470164..a1a4ecd2654 100644 --- a/arch/arm/mach-omap2/clockdomain44xx.c +++ b/arch/arm/mach-omap2/clockdomain44xx.c @@ -12,8 +12,60 @@ * published by the Free Software Foundation. */ +#include <linux/kernel.h> #include "clockdomain.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) { @@ -68,6 +120,14 @@ static int omap4_clkdm_clk_disable(struct clockdomain *clkdm) } 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_wakeup = omap4_clkdm_wakeup, .clkdm_allow_idle = omap4_clkdm_allow_idle, diff --git a/arch/arm/mach-omap2/cm44xx.h b/arch/arm/mach-omap2/cm44xx.h index 48fc3f426fb..0b87ec82b41 100644 --- a/arch/arm/mach-omap2/cm44xx.h +++ b/arch/arm/mach-omap2/cm44xx.h @@ -21,6 +21,7 @@ #include "cm.h" #define OMAP4_CM_CLKSTCTRL 0x0000 +#define OMAP4_CM_STATICDEP 0x0004 /* Function prototypes */ # ifndef __ASSEMBLER__ |