ARM: OMAP2+: clockdomain: work on wkdep/sleepdep functions
Split the clkdm_(add|del)_(wk|sleep)dep() functions into lockless and locking versions -- this will be needed in a subsequent patch. Also, while here, remove the leading underscore, since these are not currently static functions. And for functions that have kerneldoc-style comment blocks, but which are missing the initial '/**' tag, fix the tag to indicate that they are kerneldoc. Signed-off-by: Paul Walmsley <paul@pwsan.com>
This commit is contained in:
Paul Walmsley
parent
cc3af91b50
commit
65958fb6ca
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@ -120,7 +120,7 @@ static struct clkdm_dep *_clkdm_deps_lookup(struct clockdomain *clkdm,
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return cd;
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}
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/*
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/**
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* _autodep_lookup - resolve autodep clkdm names to clkdm pointers; store
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* @autodep: struct clkdm_autodep * to resolve
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*
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@ -152,66 +152,6 @@ static void _autodep_lookup(struct clkdm_autodep *autodep)
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autodep->clkdm.ptr = clkdm;
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}
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/*
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* _clkdm_add_autodeps - add auto sleepdeps/wkdeps to clkdm upon clock enable
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* @clkdm: struct clockdomain *
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*
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* Add the "autodep" sleep & wakeup dependencies to clockdomain 'clkdm'
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* in hardware-supervised mode. Meant to be called from clock framework
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* when a clock inside clockdomain 'clkdm' is enabled. No return value.
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*
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* XXX autodeps are deprecated and should be removed at the earliest
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* opportunity
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*/
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void _clkdm_add_autodeps(struct clockdomain *clkdm)
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{
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struct clkdm_autodep *autodep;
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if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
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return;
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for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
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if (IS_ERR(autodep->clkdm.ptr))
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continue;
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pr_debug("clockdomain: %s: adding %s sleepdep/wkdep\n",
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clkdm->name, autodep->clkdm.ptr->name);
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clkdm_add_sleepdep(clkdm, autodep->clkdm.ptr);
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clkdm_add_wkdep(clkdm, autodep->clkdm.ptr);
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}
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}
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/*
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* _clkdm_add_autodeps - remove auto sleepdeps/wkdeps from clkdm
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* @clkdm: struct clockdomain *
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*
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* Remove the "autodep" sleep & wakeup dependencies from clockdomain 'clkdm'
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* in hardware-supervised mode. Meant to be called from clock framework
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* when a clock inside clockdomain 'clkdm' is disabled. No return value.
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*
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* XXX autodeps are deprecated and should be removed at the earliest
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* opportunity
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*/
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void _clkdm_del_autodeps(struct clockdomain *clkdm)
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{
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struct clkdm_autodep *autodep;
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if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
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return;
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for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
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if (IS_ERR(autodep->clkdm.ptr))
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continue;
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pr_debug("clockdomain: %s: removing %s sleepdep/wkdep\n",
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clkdm->name, autodep->clkdm.ptr->name);
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clkdm_del_sleepdep(clkdm, autodep->clkdm.ptr);
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clkdm_del_wkdep(clkdm, autodep->clkdm.ptr);
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}
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}
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/**
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* _resolve_clkdm_deps() - resolve clkdm_names in @clkdm_deps to clkdms
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* @clkdm: clockdomain that we are resolving dependencies for
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@ -236,6 +176,180 @@ static void _resolve_clkdm_deps(struct clockdomain *clkdm,
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}
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}
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/**
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* _clkdm_add_wkdep - add a wakeup dependency from clkdm2 to clkdm1 (lockless)
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* @clkdm1: wake this struct clockdomain * up (dependent)
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* @clkdm2: when this struct clockdomain * wakes up (source)
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*
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* When the clockdomain represented by @clkdm2 wakes up, wake up
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* @clkdm1. Implemented in hardware on the OMAP, this feature is
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* designed to reduce wakeup latency of the dependent clockdomain @clkdm1.
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* Returns -EINVAL if presented with invalid clockdomain pointers,
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* -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or 0 upon
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* success.
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*/
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static int _clkdm_add_wkdep(struct clockdomain *clkdm1,
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struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_add_wkdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_inc_return(&cd->wkdep_usecount) == 1) {
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pr_debug("clockdomain: hardware will wake up %s when %s wakes up\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
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}
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return ret;
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}
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/**
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* _clkdm_del_wkdep - remove a wakeup dep from clkdm2 to clkdm1 (lockless)
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* @clkdm1: wake this struct clockdomain * up (dependent)
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* @clkdm2: when this struct clockdomain * wakes up (source)
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*
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* Remove a wakeup dependency causing @clkdm1 to wake up when @clkdm2
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* wakes up. Returns -EINVAL if presented with invalid clockdomain
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* pointers, -ENOENT if @clkdm2 cannot wake up clkdm1 in hardware, or
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* 0 upon success.
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*/
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static int _clkdm_del_wkdep(struct clockdomain *clkdm1,
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struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_del_wkdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_dec_return(&cd->wkdep_usecount) == 0) {
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pr_debug("clockdomain: hardware will no longer wake up %s after %s wakes up\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
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}
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return ret;
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}
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/**
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* _clkdm_add_sleepdep - add a sleep dependency from clkdm2 to clkdm1 (lockless)
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* @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
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* @clkdm2: when this struct clockdomain * is active (source)
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*
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* Prevent @clkdm1 from automatically going inactive (and then to
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* retention or off) if @clkdm2 is active. Returns -EINVAL if
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* presented with invalid clockdomain pointers or called on a machine
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* that does not support software-configurable hardware sleep
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* dependencies, -ENOENT if the specified dependency cannot be set in
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* hardware, or 0 upon success.
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*/
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static int _clkdm_add_sleepdep(struct clockdomain *clkdm1,
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struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_add_sleepdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_inc_return(&cd->sleepdep_usecount) == 1) {
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pr_debug("clockdomain: will prevent %s from sleeping if %s is active\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
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}
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return ret;
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}
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/**
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* _clkdm_del_sleepdep - remove a sleep dep from clkdm2 to clkdm1 (lockless)
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* @clkdm1: prevent this struct clockdomain * from sleeping (dependent)
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* @clkdm2: when this struct clockdomain * is active (source)
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*
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* Allow @clkdm1 to automatically go inactive (and then to retention or
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* off), independent of the activity state of @clkdm2. Returns -EINVAL
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* if presented with invalid clockdomain pointers or called on a machine
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* that does not support software-configurable hardware sleep dependencies,
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* -ENOENT if the specified dependency cannot be cleared in hardware, or
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* 0 upon success.
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*/
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static int _clkdm_del_sleepdep(struct clockdomain *clkdm1,
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struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_del_sleepdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_dec_return(&cd->sleepdep_usecount) == 0) {
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pr_debug("clockdomain: will no longer prevent %s from sleeping if %s is active\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
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}
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return ret;
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}
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/* Public functions */
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/**
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@ -453,33 +567,7 @@ struct powerdomain *clkdm_get_pwrdm(struct clockdomain *clkdm)
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*/
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int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_add_wkdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_inc_return(&cd->wkdep_usecount) == 1) {
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pr_debug("clockdomain: hardware will wake up %s when %s wakes up\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
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}
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return ret;
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return _clkdm_add_wkdep(clkdm1, clkdm2);
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}
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/**
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@ -494,33 +582,7 @@ int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
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*/
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int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_del_wkdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear wake up of %s when %s wakes up\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_dec_return(&cd->wkdep_usecount) == 0) {
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pr_debug("clockdomain: hardware will no longer wake up %s after %s wakes up\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
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}
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return ret;
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return _clkdm_del_wkdep(clkdm1, clkdm2);
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}
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/**
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@ -597,33 +659,7 @@ int clkdm_clear_all_wkdeps(struct clockdomain *clkdm)
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*/
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int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_add_sleepdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_inc_return(&cd->sleepdep_usecount) == 1) {
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pr_debug("clockdomain: will prevent %s from sleeping if %s is active\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
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}
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return ret;
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return _clkdm_add_sleepdep(clkdm1, clkdm2);
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}
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/**
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@ -640,33 +676,7 @@ int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
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*/
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int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
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{
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struct clkdm_dep *cd;
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int ret = 0;
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if (!clkdm1 || !clkdm2)
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return -EINVAL;
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cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
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if (IS_ERR(cd))
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ret = PTR_ERR(cd);
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if (!arch_clkdm || !arch_clkdm->clkdm_del_sleepdep)
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ret = -EINVAL;
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if (ret) {
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pr_debug("clockdomain: hardware cannot set/clear sleep dependency affecting %s from %s\n",
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clkdm1->name, clkdm2->name);
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return ret;
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}
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if (atomic_dec_return(&cd->sleepdep_usecount) == 0) {
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pr_debug("clockdomain: will no longer prevent %s from sleeping if %s is active\n",
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clkdm1->name, clkdm2->name);
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ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
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}
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return ret;
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return _clkdm_del_sleepdep(clkdm1, clkdm2);
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}
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/**
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@ -977,6 +987,68 @@ bool clkdm_missing_idle_reporting(struct clockdomain *clkdm)
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return (clkdm->flags & CLKDM_MISSING_IDLE_REPORTING) ? true : false;
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}
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/* Public autodep handling functions (deprecated) */
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/**
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* clkdm_add_autodeps - add auto sleepdeps/wkdeps to clkdm upon clock enable
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* @clkdm: struct clockdomain *
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*
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* Add the "autodep" sleep & wakeup dependencies to clockdomain 'clkdm'
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* in hardware-supervised mode. Meant to be called from clock framework
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* when a clock inside clockdomain 'clkdm' is enabled. No return value.
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*
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* XXX autodeps are deprecated and should be removed at the earliest
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* opportunity
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*/
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void clkdm_add_autodeps(struct clockdomain *clkdm)
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{
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struct clkdm_autodep *autodep;
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if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
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return;
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for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
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if (IS_ERR(autodep->clkdm.ptr))
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continue;
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pr_debug("clockdomain: %s: adding %s sleepdep/wkdep\n",
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clkdm->name, autodep->clkdm.ptr->name);
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_clkdm_add_sleepdep(clkdm, autodep->clkdm.ptr);
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_clkdm_add_wkdep(clkdm, autodep->clkdm.ptr);
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}
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}
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/**
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* clkdm_del_autodeps - remove auto sleepdeps/wkdeps from clkdm
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* @clkdm: struct clockdomain *
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*
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* Remove the "autodep" sleep & wakeup dependencies from clockdomain 'clkdm'
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* in hardware-supervised mode. Meant to be called from clock framework
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* when a clock inside clockdomain 'clkdm' is disabled. No return value.
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*
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* XXX autodeps are deprecated and should be removed at the earliest
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* opportunity
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*/
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void clkdm_del_autodeps(struct clockdomain *clkdm)
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{
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struct clkdm_autodep *autodep;
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if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
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return;
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for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
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if (IS_ERR(autodep->clkdm.ptr))
|
||||
continue;
|
||||
|
||||
pr_debug("clockdomain: %s: removing %s sleepdep/wkdep\n",
|
||||
clkdm->name, autodep->clkdm.ptr->name);
|
||||
|
||||
_clkdm_del_sleepdep(clkdm, autodep->clkdm.ptr);
|
||||
_clkdm_del_wkdep(clkdm, autodep->clkdm.ptr);
|
||||
}
|
||||
}
|
||||
|
||||
/* Clockdomain-to-clock/hwmod framework interface code */
|
||||
|
||||
static int _clkdm_clk_hwmod_enable(struct clockdomain *clkdm)
|
||||
|
|
|
|||
|
|
@ -216,8 +216,9 @@ extern void __init omap243x_clockdomains_init(void);
|
|||
extern void __init omap3xxx_clockdomains_init(void);
|
||||
extern void __init am33xx_clockdomains_init(void);
|
||||
extern void __init omap44xx_clockdomains_init(void);
|
||||
extern void _clkdm_add_autodeps(struct clockdomain *clkdm);
|
||||
extern void _clkdm_del_autodeps(struct clockdomain *clkdm);
|
||||
|
||||
extern void clkdm_add_autodeps(struct clockdomain *clkdm);
|
||||
extern void clkdm_del_autodeps(struct clockdomain *clkdm);
|
||||
|
||||
extern struct clkdm_ops omap2_clkdm_operations;
|
||||
extern struct clkdm_ops omap3_clkdm_operations;
|
||||
|
|
|
|||
|
|
@ -210,7 +210,7 @@ static int omap3xxx_clkdm_wakeup(struct clockdomain *clkdm)
|
|||
static void omap3xxx_clkdm_allow_idle(struct clockdomain *clkdm)
|
||||
{
|
||||
if (atomic_read(&clkdm->usecount) > 0)
|
||||
_clkdm_add_autodeps(clkdm);
|
||||
clkdm_add_autodeps(clkdm);
|
||||
|
||||
omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
|
||||
clkdm->clktrctrl_mask);
|
||||
|
|
@ -222,7 +222,7 @@ static void omap3xxx_clkdm_deny_idle(struct clockdomain *clkdm)
|
|||
clkdm->clktrctrl_mask);
|
||||
|
||||
if (atomic_read(&clkdm->usecount) > 0)
|
||||
_clkdm_del_autodeps(clkdm);
|
||||
clkdm_del_autodeps(clkdm);
|
||||
}
|
||||
|
||||
static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
|
||||
|
|
@ -250,7 +250,7 @@ static int omap3xxx_clkdm_clk_enable(struct clockdomain *clkdm)
|
|||
/* Disable HW transitions when we are changing deps */
|
||||
omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
|
||||
clkdm->clktrctrl_mask);
|
||||
_clkdm_add_autodeps(clkdm);
|
||||
clkdm_add_autodeps(clkdm);
|
||||
omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
|
||||
clkdm->clktrctrl_mask);
|
||||
} else {
|
||||
|
|
@ -287,7 +287,7 @@ static int omap3xxx_clkdm_clk_disable(struct clockdomain *clkdm)
|
|||
/* Disable HW transitions when we are changing deps */
|
||||
omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
|
||||
clkdm->clktrctrl_mask);
|
||||
_clkdm_del_autodeps(clkdm);
|
||||
clkdm_del_autodeps(clkdm);
|
||||
omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
|
||||
clkdm->clktrctrl_mask);
|
||||
} else {
|
||||
|
|
|
|||
Loading…
Reference in a new issue