/*
* OMAP2/3/4 clockdomain framework functions
*
- * Copyright (C) 2008-2010 Texas Instruments, Inc.
- * Copyright (C) 2008-2010 Nokia Corporation
+ * Copyright (C) 2008-2011 Texas Instruments, Inc.
+ * Copyright (C) 2008-2011 Nokia Corporation
*
* Written by Paul Walmsley and Jouni Högander
* Added OMAP4 specific support by Abhijit Pagare <abhijitpagare@ti.com>
#include <linux/device.h>
#include <linux/list.h>
#include <linux/errno.h>
+#include <linux/string.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/limits.h>
#include <linux/bitops.h>
-#include "prm2xxx_3xxx.h"
-#include "prm-regbits-24xx.h"
-#include "cm2xxx_3xxx.h"
-#include "cm-regbits-24xx.h"
-#include "cminst44xx.h"
-#include "prcm44xx.h"
-
#include <plat/clock.h>
-#include "powerdomain.h"
#include "clockdomain.h"
-#include <plat/prcm.h>
/* clkdm_list contains all registered struct clockdomains */
static LIST_HEAD(clkdm_list);
if (!clkdm || !clkdm->name)
return -EINVAL;
- if (!omap_chip_is(clkdm->omap_chip))
- return -EINVAL;
-
pwrdm = pwrdm_lookup(clkdm->pwrdm.name);
if (!pwrdm) {
pr_err("clockdomain: %s: powerdomain %s does not exist\n",
pwrdm_add_clkdm(pwrdm, clkdm);
+ spin_lock_init(&clkdm->lock);
+
pr_debug("clockdomain: registered %s\n", clkdm->name);
return 0;
{
struct clkdm_dep *cd;
- if (!clkdm || !deps || !omap_chip_is(clkdm->omap_chip))
+ if (!clkdm || !deps)
return ERR_PTR(-EINVAL);
for (cd = deps; cd->clkdm_name; cd++) {
- if (!omap_chip_is(cd->omap_chip))
- continue;
-
if (!cd->clkdm && cd->clkdm_name)
cd->clkdm = _clkdm_lookup(cd->clkdm_name);
if (!autodep)
return;
- if (!omap_chip_is(autodep->omap_chip))
- return;
-
clkdm = clkdm_lookup(autodep->clkdm.name);
if (!clkdm) {
pr_err("clockdomain: autodeps: clockdomain %s does not exist\n",
* XXX autodeps are deprecated and should be removed at the earliest
* opportunity
*/
-static void _clkdm_add_autodeps(struct clockdomain *clkdm)
+void _clkdm_add_autodeps(struct clockdomain *clkdm)
{
struct clkdm_autodep *autodep;
- if (!autodeps)
+ if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
return;
for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
if (IS_ERR(autodep->clkdm.ptr))
continue;
- if (!omap_chip_is(autodep->omap_chip))
- continue;
-
pr_debug("clockdomain: adding %s sleepdep/wkdep for "
"clkdm %s\n", autodep->clkdm.ptr->name,
clkdm->name);
* XXX autodeps are deprecated and should be removed at the earliest
* opportunity
*/
-static void _clkdm_del_autodeps(struct clockdomain *clkdm)
+void _clkdm_del_autodeps(struct clockdomain *clkdm)
{
struct clkdm_autodep *autodep;
- if (!autodeps)
+ if (!autodeps || clkdm->flags & CLKDM_NO_AUTODEPS)
return;
for (autodep = autodeps; autodep->clkdm.ptr; autodep++) {
if (IS_ERR(autodep->clkdm.ptr))
continue;
- if (!omap_chip_is(autodep->omap_chip))
- continue;
-
pr_debug("clockdomain: removing %s sleepdep/wkdep for "
"clkdm %s\n", autodep->clkdm.ptr->name,
clkdm->name);
}
/**
- * _enable_hwsup - place a clockdomain into hardware-supervised idle
- * @clkdm: struct clockdomain *
+ * _resolve_clkdm_deps() - resolve clkdm_names in @clkdm_deps to clkdms
+ * @clkdm: clockdomain that we are resolving dependencies for
+ * @clkdm_deps: ptr to array of struct clkdm_deps to resolve
*
- * Place the clockdomain into hardware-supervised idle mode. No return
- * value.
- *
- * XXX Should this return an error if the clockdomain does not support
- * hardware-supervised idle mode?
+ * Iterates through @clkdm_deps, looking up the struct clockdomain named by
+ * clkdm_name and storing the clockdomain pointer in the struct clkdm_dep.
+ * No return value.
*/
-static void _enable_hwsup(struct clockdomain *clkdm)
+static void _resolve_clkdm_deps(struct clockdomain *clkdm,
+ struct clkdm_dep *clkdm_deps)
{
- if (cpu_is_omap24xx())
- omap2xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
- else if (cpu_is_omap34xx())
- omap3xxx_cm_clkdm_enable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
- else if (cpu_is_omap44xx())
- return omap4_cminst_clkdm_enable_hwsup(clkdm->prcm_partition,
- clkdm->cm_inst,
- clkdm->clkdm_offs);
- else
- BUG();
+ struct clkdm_dep *cd;
+
+ for (cd = clkdm_deps; cd && cd->clkdm_name; cd++) {
+ if (cd->clkdm)
+ continue;
+ cd->clkdm = _clkdm_lookup(cd->clkdm_name);
+
+ WARN(!cd->clkdm, "clockdomain: %s: could not find clkdm %s while resolving dependencies - should never happen",
+ clkdm->name, cd->clkdm_name);
+ }
}
+/* Public functions */
+
/**
- * _disable_hwsup - place a clockdomain into software-supervised idle
- * @clkdm: struct clockdomain *
- *
- * Place the clockdomain @clkdm into software-supervised idle mode.
- * No return value.
+ * clkdm_register_platform_funcs - register clockdomain implementation fns
+ * @co: func pointers for arch specific implementations
*
- * XXX Should this return an error if the clockdomain does not support
- * software-supervised idle mode?
+ * Register the list of function pointers used to implement the
+ * clockdomain functions on different OMAP SoCs. Should be called
+ * before any other clkdm_register*() function. Returns -EINVAL if
+ * @co is null, -EEXIST if platform functions have already been
+ * registered, or 0 upon success.
*/
-static void _disable_hwsup(struct clockdomain *clkdm)
+int clkdm_register_platform_funcs(struct clkdm_ops *co)
{
- if (cpu_is_omap24xx())
- omap2xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
- else if (cpu_is_omap34xx())
- omap3xxx_cm_clkdm_disable_hwsup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
- else if (cpu_is_omap44xx())
- return omap4_cminst_clkdm_disable_hwsup(clkdm->prcm_partition,
- clkdm->cm_inst,
- clkdm->clkdm_offs);
- else
- BUG();
-}
+ if (!co)
+ return -EINVAL;
-/* Public functions */
+ if (arch_clkdm)
+ return -EEXIST;
+
+ arch_clkdm = co;
+
+ return 0;
+};
/**
- * clkdm_init - set up the clockdomain layer
- * @clkdms: optional pointer to an array of clockdomains to register
- * @init_autodeps: optional pointer to an array of autodeps to register
- * @custom_funcs: func pointers for arch specfic implementations
+ * clkdm_register_clkdms - register SoC clockdomains
+ * @cs: pointer to an array of struct clockdomain to register
*
- * Set up internal state. If a pointer to an array of clockdomains
- * @clkdms was supplied, loop through the list of clockdomains,
- * register all that are available on the current platform. Similarly,
- * if a pointer to an array of clockdomain autodependencies
- * @init_autodeps was provided, register those. No return value.
+ * Register the clockdomains available on a particular OMAP SoC. Must
+ * be called after clkdm_register_platform_funcs(). May be called
+ * multiple times. Returns -EACCES if called before
+ * clkdm_register_platform_funcs(); -EINVAL if the argument @cs is
+ * null; or 0 upon success.
*/
-void clkdm_init(struct clockdomain **clkdms,
- struct clkdm_autodep *init_autodeps,
- struct clkdm_ops *custom_funcs)
+int clkdm_register_clkdms(struct clockdomain **cs)
{
struct clockdomain **c = NULL;
- struct clockdomain *clkdm;
- struct clkdm_autodep *autodep = NULL;
- if (!custom_funcs)
- WARN(1, "No custom clkdm functions registered\n");
- else
- arch_clkdm = custom_funcs;
+ if (!arch_clkdm)
+ return -EACCES;
- if (clkdms)
- for (c = clkdms; *c; c++)
- _clkdm_register(*c);
+ if (!cs)
+ return -EINVAL;
+
+ for (c = cs; *c; c++)
+ _clkdm_register(*c);
+
+ return 0;
+}
+
+/**
+ * clkdm_register_autodeps - register autodeps (if required)
+ * @ia: pointer to a static array of struct clkdm_autodep to register
+ *
+ * Register clockdomain "automatic dependencies." These are
+ * clockdomain wakeup and sleep dependencies that are automatically
+ * added whenever the first clock inside a clockdomain is enabled, and
+ * removed whenever the last clock inside a clockdomain is disabled.
+ * These are currently only used on OMAP3 devices, and are deprecated,
+ * since they waste energy. However, until the OMAP2/3 IP block
+ * enable/disable sequence can be converted to match the OMAP4
+ * sequence, they are needed.
+ *
+ * Must be called only after all of the SoC clockdomains are
+ * registered, since the function will resolve autodep clockdomain
+ * names into clockdomain pointers.
+ *
+ * The struct clkdm_autodep @ia array must be static, as this function
+ * does not copy the array elements.
+ *
+ * Returns -EACCES if called before any clockdomains have been
+ * registered, -EINVAL if called with a null @ia argument, -EEXIST if
+ * autodeps have already been registered, or 0 upon success.
+ */
+int clkdm_register_autodeps(struct clkdm_autodep *ia)
+{
+ struct clkdm_autodep *a = NULL;
+
+ if (list_empty(&clkdm_list))
+ return -EACCES;
+
+ if (!ia)
+ return -EINVAL;
- autodeps = init_autodeps;
if (autodeps)
- for (autodep = autodeps; autodep->clkdm.ptr; autodep++)
- _autodep_lookup(autodep);
+ return -EEXIST;
+
+ autodeps = ia;
+ for (a = autodeps; a->clkdm.ptr; a++)
+ _autodep_lookup(a);
+
+ return 0;
+}
+
+/**
+ * clkdm_complete_init - set up the clockdomain layer
+ *
+ * Put all clockdomains into software-supervised mode; PM code should
+ * later enable hardware-supervised mode as appropriate. Must be
+ * called after clkdm_register_clkdms(). Returns -EACCES if called
+ * before clkdm_register_clkdms(), or 0 upon success.
+ */
+int clkdm_complete_init(void)
+{
+ struct clockdomain *clkdm;
+
+ if (list_empty(&clkdm_list))
+ return -EACCES;
- /*
- * Put all clockdomains into software-supervised mode; PM code
- * should later enable hardware-supervised mode as appropriate
- */
list_for_each_entry(clkdm, &clkdm_list, node) {
if (clkdm->flags & CLKDM_CAN_FORCE_WAKEUP)
- omap2_clkdm_wakeup(clkdm);
+ clkdm_wakeup(clkdm);
else if (clkdm->flags & CLKDM_CAN_DISABLE_AUTO)
- omap2_clkdm_deny_idle(clkdm);
+ clkdm_deny_idle(clkdm);
+ _resolve_clkdm_deps(clkdm, clkdm->wkdep_srcs);
clkdm_clear_all_wkdeps(clkdm);
+
+ _resolve_clkdm_deps(clkdm, clkdm->sleepdep_srcs);
clkdm_clear_all_sleepdeps(clkdm);
}
+
+ return 0;
}
/**
int clkdm_add_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
-
- if (!cpu_is_omap24xx() && !cpu_is_omap34xx()) {
- pr_err("clockdomain: %s/%s: %s: not yet implemented\n",
- clkdm1->name, clkdm2->name, __func__);
- return -EINVAL;
- }
+ int ret = 0;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
- if (IS_ERR(cd)) {
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
+
+ if (!arch_clkdm || !arch_clkdm->clkdm_add_wkdep)
+ ret = -EINVAL;
+
+ if (ret) {
pr_debug("clockdomain: hardware cannot set/clear wake up of "
"%s when %s wakes up\n", clkdm1->name, clkdm2->name);
- return PTR_ERR(cd);
+ return ret;
}
if (atomic_inc_return(&cd->wkdep_usecount) == 1) {
pr_debug("clockdomain: hardware will wake up %s when %s wakes "
"up\n", clkdm1->name, clkdm2->name);
- omap2_prm_set_mod_reg_bits((1 << clkdm2->dep_bit),
- clkdm1->pwrdm.ptr->prcm_offs, PM_WKDEP);
+ ret = arch_clkdm->clkdm_add_wkdep(clkdm1, clkdm2);
}
- return 0;
+ return ret;
}
/**
int clkdm_del_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
-
- if (!cpu_is_omap24xx() && !cpu_is_omap34xx()) {
- pr_err("clockdomain: %s/%s: %s: not yet implemented\n",
- clkdm1->name, clkdm2->name, __func__);
- return -EINVAL;
- }
+ int ret = 0;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
- if (IS_ERR(cd)) {
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
+
+ if (!arch_clkdm || !arch_clkdm->clkdm_del_wkdep)
+ ret = -EINVAL;
+
+ if (ret) {
pr_debug("clockdomain: hardware cannot set/clear wake up of "
"%s when %s wakes up\n", clkdm1->name, clkdm2->name);
- return PTR_ERR(cd);
+ return ret;
}
if (atomic_dec_return(&cd->wkdep_usecount) == 0) {
pr_debug("clockdomain: hardware will no longer wake up %s "
"after %s wakes up\n", clkdm1->name, clkdm2->name);
- omap2_prm_clear_mod_reg_bits((1 << clkdm2->dep_bit),
- clkdm1->pwrdm.ptr->prcm_offs, PM_WKDEP);
+ ret = arch_clkdm->clkdm_del_wkdep(clkdm1, clkdm2);
}
- return 0;
+ return ret;
}
/**
int clkdm_read_wkdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
+ int ret = 0;
if (!clkdm1 || !clkdm2)
return -EINVAL;
- if (!cpu_is_omap24xx() && !cpu_is_omap34xx()) {
- pr_err("clockdomain: %s/%s: %s: not yet implemented\n",
- clkdm1->name, clkdm2->name, __func__);
- return -EINVAL;
- }
-
cd = _clkdm_deps_lookup(clkdm2, clkdm1->wkdep_srcs);
- if (IS_ERR(cd)) {
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
+
+ if (!arch_clkdm || !arch_clkdm->clkdm_read_wkdep)
+ ret = -EINVAL;
+
+ if (ret) {
pr_debug("clockdomain: hardware cannot set/clear wake up of "
"%s when %s wakes up\n", clkdm1->name, clkdm2->name);
- return PTR_ERR(cd);
+ return ret;
}
/* XXX It's faster to return the atomic wkdep_usecount */
- return omap2_prm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs, PM_WKDEP,
- (1 << clkdm2->dep_bit));
+ return arch_clkdm->clkdm_read_wkdep(clkdm1, clkdm2);
}
/**
*/
int clkdm_clear_all_wkdeps(struct clockdomain *clkdm)
{
- struct clkdm_dep *cd;
- u32 mask = 0;
-
- if (!cpu_is_omap24xx() && !cpu_is_omap34xx()) {
- pr_err("clockdomain: %s: %s: not yet implemented\n",
- clkdm->name, __func__);
- return -EINVAL;
- }
-
if (!clkdm)
return -EINVAL;
- for (cd = clkdm->wkdep_srcs; cd && cd->clkdm_name; cd++) {
- if (!omap_chip_is(cd->omap_chip))
- continue;
-
- if (!cd->clkdm && cd->clkdm_name)
- cd->clkdm = _clkdm_lookup(cd->clkdm_name);
-
- /* PRM accesses are slow, so minimize them */
- mask |= 1 << cd->clkdm->dep_bit;
- atomic_set(&cd->wkdep_usecount, 0);
- }
-
- omap2_prm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs, PM_WKDEP);
+ if (!arch_clkdm || !arch_clkdm->clkdm_clear_all_wkdeps)
+ return -EINVAL;
- return 0;
+ return arch_clkdm->clkdm_clear_all_wkdeps(clkdm);
}
/**
int clkdm_add_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
-
- if (!cpu_is_omap34xx())
- return -EINVAL;
+ int ret = 0;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
- if (IS_ERR(cd)) {
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
+
+ if (!arch_clkdm || !arch_clkdm->clkdm_add_sleepdep)
+ ret = -EINVAL;
+
+ if (ret) {
pr_debug("clockdomain: hardware cannot set/clear sleep "
"dependency affecting %s from %s\n", clkdm1->name,
clkdm2->name);
- return PTR_ERR(cd);
+ return ret;
}
if (atomic_inc_return(&cd->sleepdep_usecount) == 1) {
pr_debug("clockdomain: will prevent %s from sleeping if %s "
"is active\n", clkdm1->name, clkdm2->name);
- omap2_cm_set_mod_reg_bits((1 << clkdm2->dep_bit),
- clkdm1->pwrdm.ptr->prcm_offs,
- OMAP3430_CM_SLEEPDEP);
+ ret = arch_clkdm->clkdm_add_sleepdep(clkdm1, clkdm2);
}
- return 0;
+ return ret;
}
/**
int clkdm_del_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
-
- if (!cpu_is_omap34xx())
- return -EINVAL;
+ int ret = 0;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
- if (IS_ERR(cd)) {
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
+
+ if (!arch_clkdm || !arch_clkdm->clkdm_del_sleepdep)
+ ret = -EINVAL;
+
+ if (ret) {
pr_debug("clockdomain: hardware cannot set/clear sleep "
"dependency affecting %s from %s\n", clkdm1->name,
clkdm2->name);
- return PTR_ERR(cd);
+ return ret;
}
if (atomic_dec_return(&cd->sleepdep_usecount) == 0) {
"sleeping if %s is active\n", clkdm1->name,
clkdm2->name);
- omap2_cm_clear_mod_reg_bits((1 << clkdm2->dep_bit),
- clkdm1->pwrdm.ptr->prcm_offs,
- OMAP3430_CM_SLEEPDEP);
+ ret = arch_clkdm->clkdm_del_sleepdep(clkdm1, clkdm2);
}
- return 0;
+ return ret;
}
/**
int clkdm_read_sleepdep(struct clockdomain *clkdm1, struct clockdomain *clkdm2)
{
struct clkdm_dep *cd;
-
- if (!cpu_is_omap34xx())
- return -EINVAL;
+ int ret = 0;
if (!clkdm1 || !clkdm2)
return -EINVAL;
cd = _clkdm_deps_lookup(clkdm2, clkdm1->sleepdep_srcs);
- if (IS_ERR(cd)) {
+ if (IS_ERR(cd))
+ ret = PTR_ERR(cd);
+
+ if (!arch_clkdm || !arch_clkdm->clkdm_read_sleepdep)
+ ret = -EINVAL;
+
+ if (ret) {
pr_debug("clockdomain: hardware cannot set/clear sleep "
"dependency affecting %s from %s\n", clkdm1->name,
clkdm2->name);
- return PTR_ERR(cd);
+ return ret;
}
/* XXX It's faster to return the atomic sleepdep_usecount */
- return omap2_prm_read_mod_bits_shift(clkdm1->pwrdm.ptr->prcm_offs,
- OMAP3430_CM_SLEEPDEP,
- (1 << clkdm2->dep_bit));
+ return arch_clkdm->clkdm_read_sleepdep(clkdm1, clkdm2);
}
/**
*/
int clkdm_clear_all_sleepdeps(struct clockdomain *clkdm)
{
- struct clkdm_dep *cd;
- u32 mask = 0;
-
- if (!cpu_is_omap34xx())
- return -EINVAL;
-
if (!clkdm)
return -EINVAL;
- for (cd = clkdm->sleepdep_srcs; cd && cd->clkdm_name; cd++) {
- if (!omap_chip_is(cd->omap_chip))
- continue;
-
- if (!cd->clkdm && cd->clkdm_name)
- cd->clkdm = _clkdm_lookup(cd->clkdm_name);
-
- /* PRM accesses are slow, so minimize them */
- mask |= 1 << cd->clkdm->dep_bit;
- atomic_set(&cd->sleepdep_usecount, 0);
- }
-
- omap2_prm_clear_mod_reg_bits(mask, clkdm->pwrdm.ptr->prcm_offs,
- OMAP3430_CM_SLEEPDEP);
+ if (!arch_clkdm || !arch_clkdm->clkdm_clear_all_sleepdeps)
+ return -EINVAL;
- return 0;
+ return arch_clkdm->clkdm_clear_all_sleepdeps(clkdm);
}
/**
- * omap2_clkdm_sleep - force clockdomain sleep transition
+ * clkdm_sleep - force clockdomain sleep transition
* @clkdm: struct clockdomain *
*
* Instruct the CM to force a sleep transition on the specified
* clockdomain does not support software-initiated sleep; 0 upon
* success.
*/
-int omap2_clkdm_sleep(struct clockdomain *clkdm)
+int clkdm_sleep(struct clockdomain *clkdm)
{
+ int ret;
+ unsigned long flags;
+
if (!clkdm)
return -EINVAL;
return -EINVAL;
}
- pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
-
- if (cpu_is_omap24xx()) {
-
- omap2_cm_set_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
- clkdm->pwrdm.ptr->prcm_offs, OMAP2_PM_PWSTCTRL);
-
- } else if (cpu_is_omap34xx()) {
-
- omap3xxx_cm_clkdm_force_sleep(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
-
- } else if (cpu_is_omap44xx()) {
-
- omap4_cminst_clkdm_force_sleep(clkdm->prcm_partition,
- clkdm->cm_inst,
- clkdm->clkdm_offs);
+ if (!arch_clkdm || !arch_clkdm->clkdm_sleep)
+ return -EINVAL;
- } else {
- BUG();
- };
+ pr_debug("clockdomain: forcing sleep on %s\n", clkdm->name);
- return 0;
+ spin_lock_irqsave(&clkdm->lock, flags);
+ clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
+ ret = arch_clkdm->clkdm_sleep(clkdm);
+ spin_unlock_irqrestore(&clkdm->lock, flags);
+ return ret;
}
/**
- * omap2_clkdm_wakeup - force clockdomain wakeup transition
+ * clkdm_wakeup - force clockdomain wakeup transition
* @clkdm: struct clockdomain *
*
* Instruct the CM to force a wakeup transition on the specified
* clockdomain does not support software-controlled wakeup; 0 upon
* success.
*/
-int omap2_clkdm_wakeup(struct clockdomain *clkdm)
+int clkdm_wakeup(struct clockdomain *clkdm)
{
+ int ret;
+ unsigned long flags;
+
if (!clkdm)
return -EINVAL;
return -EINVAL;
}
- pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
-
- if (cpu_is_omap24xx()) {
-
- omap2_cm_clear_mod_reg_bits(OMAP24XX_FORCESTATE_MASK,
- clkdm->pwrdm.ptr->prcm_offs, OMAP2_PM_PWSTCTRL);
-
- } else if (cpu_is_omap34xx()) {
-
- omap3xxx_cm_clkdm_force_wakeup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
-
- } else if (cpu_is_omap44xx()) {
-
- omap4_cminst_clkdm_force_wakeup(clkdm->prcm_partition,
- clkdm->cm_inst,
- clkdm->clkdm_offs);
+ if (!arch_clkdm || !arch_clkdm->clkdm_wakeup)
+ return -EINVAL;
- } else {
- BUG();
- };
+ pr_debug("clockdomain: forcing wakeup on %s\n", clkdm->name);
- return 0;
+ spin_lock_irqsave(&clkdm->lock, flags);
+ clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
+ ret = arch_clkdm->clkdm_wakeup(clkdm);
+ ret |= pwrdm_state_switch(clkdm->pwrdm.ptr);
+ spin_unlock_irqrestore(&clkdm->lock, flags);
+ return ret;
}
/**
- * omap2_clkdm_allow_idle - enable hwsup idle transitions for clkdm
+ * clkdm_allow_idle - enable hwsup idle transitions for clkdm
* @clkdm: struct clockdomain *
*
* Allow the hardware to automatically switch the clockdomain @clkdm into
* framework, wkdep/sleepdep autodependencies are added; this is so
* device drivers can read and write to the device. No return value.
*/
-void omap2_clkdm_allow_idle(struct clockdomain *clkdm)
+void clkdm_allow_idle(struct clockdomain *clkdm)
{
+ unsigned long flags;
+
if (!clkdm)
return;
return;
}
+ if (!arch_clkdm || !arch_clkdm->clkdm_allow_idle)
+ return;
+
pr_debug("clockdomain: enabling automatic idle transitions for %s\n",
clkdm->name);
- /*
- * XXX This should be removed once TI adds wakeup/sleep
- * dependency code and data for OMAP4.
- */
- if (cpu_is_omap44xx()) {
- pr_err("clockdomain: %s: OMAP4 wakeup/sleep dependency support: not yet implemented\n", clkdm->name);
- } else {
- if (atomic_read(&clkdm->usecount) > 0)
- _clkdm_add_autodeps(clkdm);
- }
-
- _enable_hwsup(clkdm);
-
+ spin_lock_irqsave(&clkdm->lock, flags);
+ clkdm->_flags |= _CLKDM_FLAG_HWSUP_ENABLED;
+ arch_clkdm->clkdm_allow_idle(clkdm);
pwrdm_clkdm_state_switch(clkdm);
+ spin_unlock_irqrestore(&clkdm->lock, flags);
}
/**
- * omap2_clkdm_deny_idle - disable hwsup idle transitions for clkdm
+ * clkdm_deny_idle - disable hwsup idle transitions for clkdm
* @clkdm: struct clockdomain *
*
* Prevent the hardware from automatically switching the clockdomain
* downstream clocks enabled in the clock framework, wkdep/sleepdep
* autodependencies are removed. No return value.
*/
-void omap2_clkdm_deny_idle(struct clockdomain *clkdm)
+void clkdm_deny_idle(struct clockdomain *clkdm)
{
+ unsigned long flags;
+
if (!clkdm)
return;
return;
}
+ if (!arch_clkdm || !arch_clkdm->clkdm_deny_idle)
+ return;
+
pr_debug("clockdomain: disabling automatic idle transitions for %s\n",
clkdm->name);
- _disable_hwsup(clkdm);
+ spin_lock_irqsave(&clkdm->lock, flags);
+ clkdm->_flags &= ~_CLKDM_FLAG_HWSUP_ENABLED;
+ arch_clkdm->clkdm_deny_idle(clkdm);
+ pwrdm_state_switch(clkdm->pwrdm.ptr);
+ spin_unlock_irqrestore(&clkdm->lock, flags);
+}
+
+/**
+ * clkdm_in_hwsup - is clockdomain @clkdm have hardware-supervised idle enabled?
+ * @clkdm: struct clockdomain *
+ *
+ * Returns true if clockdomain @clkdm currently has
+ * hardware-supervised idle enabled, or false if it does not or if
+ * @clkdm is NULL. It is only valid to call this function after
+ * clkdm_init() has been called. This function does not actually read
+ * bits from the hardware; it instead tests an in-memory flag that is
+ * changed whenever the clockdomain code changes the auto-idle mode.
+ */
+bool clkdm_in_hwsup(struct clockdomain *clkdm)
+{
+ bool ret;
+ unsigned long flags;
+
+ if (!clkdm)
+ return false;
+
+ spin_lock_irqsave(&clkdm->lock, flags);
+ ret = (clkdm->_flags & _CLKDM_FLAG_HWSUP_ENABLED) ? true : false;
+ spin_unlock_irqrestore(&clkdm->lock, flags);
+
+ return ret;
+}
+
+/* Clockdomain-to-clock/hwmod framework interface code */
+
+static int _clkdm_clk_hwmod_enable(struct clockdomain *clkdm)
+{
+ unsigned long flags;
+
+ if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_enable)
+ return -EINVAL;
/*
- * XXX This should be removed once TI adds wakeup/sleep
- * dependency code and data for OMAP4.
+ * For arch's with no autodeps, clkcm_clk_enable
+ * should be called for every clock instance or hwmod that is
+ * enabled, so the clkdm can be force woken up.
*/
- if (cpu_is_omap44xx()) {
- pr_err("clockdomain: %s: OMAP4 wakeup/sleep dependency support: not yet implemented\n", clkdm->name);
- } else {
- if (atomic_read(&clkdm->usecount) > 0)
- _clkdm_del_autodeps(clkdm);
- }
+ if ((atomic_inc_return(&clkdm->usecount) > 1) && autodeps)
+ return 0;
+
+ spin_lock_irqsave(&clkdm->lock, flags);
+ arch_clkdm->clkdm_clk_enable(clkdm);
+ pwrdm_wait_transition(clkdm->pwrdm.ptr);
+ pwrdm_clkdm_state_switch(clkdm);
+ spin_unlock_irqrestore(&clkdm->lock, flags);
+
+ pr_debug("clockdomain: clkdm %s: enabled\n", clkdm->name);
+
+ return 0;
}
+static int _clkdm_clk_hwmod_disable(struct clockdomain *clkdm)
+{
+ unsigned long flags;
-/* Clockdomain-to-clock framework interface code */
+ if (!clkdm || !arch_clkdm || !arch_clkdm->clkdm_clk_disable)
+ return -EINVAL;
+
+ if (atomic_read(&clkdm->usecount) == 0) {
+ WARN_ON(1); /* underflow */
+ return -ERANGE;
+ }
+
+ if (atomic_dec_return(&clkdm->usecount) > 0)
+ return 0;
+
+ spin_lock_irqsave(&clkdm->lock, flags);
+ arch_clkdm->clkdm_clk_disable(clkdm);
+ pwrdm_clkdm_state_switch(clkdm);
+ spin_unlock_irqrestore(&clkdm->lock, flags);
+
+ pr_debug("clockdomain: clkdm %s: disabled\n", clkdm->name);
+
+ return 0;
+}
/**
- * omap2_clkdm_clk_enable - add an enabled downstream clock to this clkdm
+ * clkdm_clk_enable - add an enabled downstream clock to this clkdm
* @clkdm: struct clockdomain *
* @clk: struct clk * of the enabled downstream clock
*
* by on-chip processors. Returns -EINVAL if passed null pointers;
* returns 0 upon success or if the clockdomain is in hwsup idle mode.
*/
-int omap2_clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
+int clkdm_clk_enable(struct clockdomain *clkdm, struct clk *clk)
{
- bool hwsup = false;
-
/*
* XXX Rewrite this code to maintain a list of enabled
* downstream clocks for debugging purposes?
*/
- if (!clkdm || !clk)
+ if (!clk)
return -EINVAL;
- if (atomic_inc_return(&clkdm->usecount) > 1)
- return 0;
-
- /* Clockdomain now has one enabled downstream clock */
-
- pr_debug("clockdomain: clkdm %s: clk %s now enabled\n", clkdm->name,
- clk->name);
-
- if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
-
- if (!clkdm->clktrctrl_mask)
- return 0;
-
- hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
-
- } else if (cpu_is_omap44xx()) {
-
- hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
- clkdm->cm_inst,
- clkdm->clkdm_offs);
-
- }
-
- if (hwsup) {
- /* Disable HW transitions when we are changing deps */
- _disable_hwsup(clkdm);
- _clkdm_add_autodeps(clkdm);
- _enable_hwsup(clkdm);
- } else {
- omap2_clkdm_wakeup(clkdm);
- }
-
- pwrdm_wait_transition(clkdm->pwrdm.ptr);
- pwrdm_clkdm_state_switch(clkdm);
-
- return 0;
+ return _clkdm_clk_hwmod_enable(clkdm);
}
/**
- * omap2_clkdm_clk_disable - remove an enabled downstream clock from this clkdm
+ * clkdm_clk_disable - remove an enabled downstream clock from this clkdm
* @clkdm: struct clockdomain *
* @clk: struct clk * of the disabled downstream clock
*
* clockdomain usecount goes to 0, put the clockdomain to sleep
* (software-supervised mode) or remove the clkdm autodependencies
* (hardware-supervised mode). Returns -EINVAL if passed null
- * pointers; -ERANGE if the @clkdm usecount underflows and debugging
- * is enabled; or returns 0 upon success or if the clockdomain is in
- * hwsup idle mode.
+ * pointers; -ERANGE if the @clkdm usecount underflows; or returns 0
+ * upon success or if the clockdomain is in hwsup idle mode.
*/
-int omap2_clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
+int clkdm_clk_disable(struct clockdomain *clkdm, struct clk *clk)
{
- bool hwsup = false;
-
/*
* XXX Rewrite this code to maintain a list of enabled
* downstream clocks for debugging purposes?
*/
- if (!clkdm || !clk)
+ if (!clk)
return -EINVAL;
-#ifdef DEBUG
- if (atomic_read(&clkdm->usecount) == 0) {
- WARN_ON(1); /* underflow */
- return -ERANGE;
- }
-#endif
+ return _clkdm_clk_hwmod_disable(clkdm);
+}
- if (atomic_dec_return(&clkdm->usecount) > 0)
+/**
+ * clkdm_hwmod_enable - add an enabled downstream hwmod to this clkdm
+ * @clkdm: struct clockdomain *
+ * @oh: struct omap_hwmod * of the enabled downstream hwmod
+ *
+ * Increment the usecount of the clockdomain @clkdm and ensure that it
+ * is awake before @oh is enabled. Intended to be called by
+ * module_enable() code.
+ * If the clockdomain is in software-supervised idle mode, force the
+ * clockdomain to wake. If the clockdomain is in hardware-supervised idle
+ * mode, add clkdm-pwrdm autodependencies, to ensure that devices in the
+ * clockdomain can be read from/written to by on-chip processors.
+ * Returns -EINVAL if passed null pointers;
+ * returns 0 upon success or if the clockdomain is in hwsup idle mode.
+ */
+int clkdm_hwmod_enable(struct clockdomain *clkdm, struct omap_hwmod *oh)
+{
+ /* The clkdm attribute does not exist yet prior OMAP4 */
+ if (cpu_is_omap24xx() || cpu_is_omap34xx())
return 0;
- /* All downstream clocks of this clockdomain are now disabled */
-
- pr_debug("clockdomain: clkdm %s: clk %s now disabled\n", clkdm->name,
- clk->name);
-
- if (cpu_is_omap24xx() || cpu_is_omap34xx()) {
-
- if (!clkdm->clktrctrl_mask)
- return 0;
-
- hwsup = omap2_cm_is_clkdm_in_hwsup(clkdm->pwrdm.ptr->prcm_offs,
- clkdm->clktrctrl_mask);
+ /*
+ * XXX Rewrite this code to maintain a list of enabled
+ * downstream hwmods for debugging purposes?
+ */
- } else if (cpu_is_omap44xx()) {
+ if (!oh)
+ return -EINVAL;
- hwsup = omap4_cminst_is_clkdm_in_hwsup(clkdm->prcm_partition,
- clkdm->cm_inst,
- clkdm->clkdm_offs);
+ return _clkdm_clk_hwmod_enable(clkdm);
+}
- }
+/**
+ * clkdm_hwmod_disable - remove an enabled downstream hwmod from this clkdm
+ * @clkdm: struct clockdomain *
+ * @oh: struct omap_hwmod * of the disabled downstream hwmod
+ *
+ * Decrement the usecount of this clockdomain @clkdm when @oh is
+ * disabled. Intended to be called by module_disable() code.
+ * If the clockdomain usecount goes to 0, put the clockdomain to sleep
+ * (software-supervised mode) or remove the clkdm autodependencies
+ * (hardware-supervised mode).
+ * Returns -EINVAL if passed null pointers; -ERANGE if the @clkdm usecount
+ * underflows; or returns 0 upon success or if the clockdomain is in hwsup
+ * idle mode.
+ */
+int clkdm_hwmod_disable(struct clockdomain *clkdm, struct omap_hwmod *oh)
+{
+ /* The clkdm attribute does not exist yet prior OMAP4 */
+ if (cpu_is_omap24xx() || cpu_is_omap34xx())
+ return 0;
- if (hwsup) {
- /* Disable HW transitions when we are changing deps */
- _disable_hwsup(clkdm);
- _clkdm_del_autodeps(clkdm);
- _enable_hwsup(clkdm);
- } else {
- omap2_clkdm_sleep(clkdm);
- }
+ /*
+ * XXX Rewrite this code to maintain a list of enabled
+ * downstream hwmods for debugging purposes?
+ */
- pwrdm_clkdm_state_switch(clkdm);
+ if (!oh)
+ return -EINVAL;
- return 0;
+ return _clkdm_clk_hwmod_disable(clkdm);
}
projects / linux-flexiantxendom0-3.2.10.git / blobdiff