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-rw-r--r--drivers/base/power/domain.c68
-rw-r--r--drivers/cpuidle/cpuidle-cps.c3
-rw-r--r--drivers/cpuidle/cpuidle-powernv.c69
-rw-r--r--drivers/devfreq/governor.h29
-rw-r--r--drivers/power/avs/rockchip-io-domain.c41
5 files changed, 176 insertions, 34 deletions
diff --git a/drivers/base/power/domain.c b/drivers/base/power/domain.c
index e697dec9d25b..ad196427b4f2 100644
--- a/drivers/base/power/domain.c
+++ b/drivers/base/power/domain.c
@@ -121,7 +121,9 @@ static const struct genpd_lock_ops genpd_spin_ops = {
#define genpd_lock_interruptible(p) p->lock_ops->lock_interruptible(p)
#define genpd_unlock(p) p->lock_ops->unlock(p)
+#define genpd_status_on(genpd) (genpd->status == GPD_STATE_ACTIVE)
#define genpd_is_irq_safe(genpd) (genpd->flags & GENPD_FLAG_IRQ_SAFE)
+#define genpd_is_always_on(genpd) (genpd->flags & GENPD_FLAG_ALWAYS_ON)
static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
struct generic_pm_domain *genpd)
@@ -130,8 +132,12 @@ static inline bool irq_safe_dev_in_no_sleep_domain(struct device *dev,
ret = pm_runtime_is_irq_safe(dev) && !genpd_is_irq_safe(genpd);
- /* Warn once if IRQ safe dev in no sleep domain */
- if (ret)
+ /*
+ * Warn once if an IRQ safe device is attached to a no sleep domain, as
+ * to indicate a suboptimal configuration for PM. For an always on
+ * domain this isn't case, thus don't warn.
+ */
+ if (ret && !genpd_is_always_on(genpd))
dev_warn_once(dev, "PM domain %s will not be powered off\n",
genpd->name);
@@ -296,11 +302,15 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
* (1) The domain is already in the "power off" state.
* (2) System suspend is in progress.
*/
- if (genpd->status == GPD_STATE_POWER_OFF
- || genpd->prepared_count > 0)
+ if (!genpd_status_on(genpd) || genpd->prepared_count > 0)
return 0;
- if (atomic_read(&genpd->sd_count) > 0)
+ /*
+ * Abort power off for the PM domain in the following situations:
+ * (1) The domain is configured as always on.
+ * (2) When the domain has a subdomain being powered on.
+ */
+ if (genpd_is_always_on(genpd) || atomic_read(&genpd->sd_count) > 0)
return -EBUSY;
list_for_each_entry(pdd, &genpd->dev_list, list_node) {
@@ -373,7 +383,7 @@ static int genpd_power_on(struct generic_pm_domain *genpd, unsigned int depth)
struct gpd_link *link;
int ret = 0;
- if (genpd->status == GPD_STATE_ACTIVE)
+ if (genpd_status_on(genpd))
return 0;
/*
@@ -752,7 +762,7 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock,
{
struct gpd_link *link;
- if (genpd->status == GPD_STATE_POWER_OFF)
+ if (!genpd_status_on(genpd) || genpd_is_always_on(genpd))
return;
if (genpd->suspended_count != genpd->device_count
@@ -761,7 +771,8 @@ static void genpd_sync_power_off(struct generic_pm_domain *genpd, bool use_lock,
/* Choose the deepest state when suspending */
genpd->state_idx = genpd->state_count - 1;
- _genpd_power_off(genpd, false);
+ if (_genpd_power_off(genpd, false))
+ return;
genpd->status = GPD_STATE_POWER_OFF;
@@ -793,7 +804,7 @@ static void genpd_sync_power_on(struct generic_pm_domain *genpd, bool use_lock,
{
struct gpd_link *link;
- if (genpd->status == GPD_STATE_ACTIVE)
+ if (genpd_status_on(genpd))
return;
list_for_each_entry(link, &genpd->slave_links, slave_node) {
@@ -1329,8 +1340,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd,
genpd_lock(subdomain);
genpd_lock_nested(genpd, SINGLE_DEPTH_NESTING);
- if (genpd->status == GPD_STATE_POWER_OFF
- && subdomain->status != GPD_STATE_POWER_OFF) {
+ if (!genpd_status_on(genpd) && genpd_status_on(subdomain)) {
ret = -EINVAL;
goto out;
}
@@ -1346,7 +1356,7 @@ static int genpd_add_subdomain(struct generic_pm_domain *genpd,
list_add_tail(&link->master_node, &genpd->master_links);
link->slave = subdomain;
list_add_tail(&link->slave_node, &subdomain->slave_links);
- if (subdomain->status != GPD_STATE_POWER_OFF)
+ if (genpd_status_on(subdomain))
genpd_sd_counter_inc(genpd);
out:
@@ -1406,7 +1416,7 @@ int pm_genpd_remove_subdomain(struct generic_pm_domain *genpd,
list_del(&link->master_node);
list_del(&link->slave_node);
kfree(link);
- if (subdomain->status != GPD_STATE_POWER_OFF)
+ if (genpd_status_on(subdomain))
genpd_sd_counter_dec(genpd);
ret = 0;
@@ -1492,6 +1502,10 @@ int pm_genpd_init(struct generic_pm_domain *genpd,
genpd->dev_ops.start = pm_clk_resume;
}
+ /* Always-on domains must be powered on at initialization. */
+ if (genpd_is_always_on(genpd) && !genpd_status_on(genpd))
+ return -EINVAL;
+
/* Use only one "off" state if there were no states declared */
if (genpd->state_count == 0) {
ret = genpd_set_default_power_state(genpd);
@@ -1700,12 +1714,12 @@ int of_genpd_add_provider_simple(struct device_node *np,
mutex_lock(&gpd_list_lock);
- if (pm_genpd_present(genpd))
+ if (pm_genpd_present(genpd)) {
ret = genpd_add_provider(np, genpd_xlate_simple, genpd);
-
- if (!ret) {
- genpd->provider = &np->fwnode;
- genpd->has_provider = true;
+ if (!ret) {
+ genpd->provider = &np->fwnode;
+ genpd->has_provider = true;
+ }
}
mutex_unlock(&gpd_list_lock);
@@ -2079,11 +2093,6 @@ static int genpd_parse_state(struct genpd_power_state *genpd_state,
int err;
u32 residency;
u32 entry_latency, exit_latency;
- const struct of_device_id *match_id;
-
- match_id = of_match_node(idle_state_match, state_node);
- if (!match_id)
- return -EINVAL;
err = of_property_read_u32(state_node, "entry-latency-us",
&entry_latency);
@@ -2132,6 +2141,7 @@ int of_genpd_parse_idle_states(struct device_node *dn,
int err, ret;
int count;
struct of_phandle_iterator it;
+ const struct of_device_id *match_id;
count = of_count_phandle_with_args(dn, "domain-idle-states", NULL);
if (count <= 0)
@@ -2144,6 +2154,9 @@ int of_genpd_parse_idle_states(struct device_node *dn,
/* Loop over the phandles until all the requested entry is found */
of_for_each_phandle(&it, err, dn, "domain-idle-states", NULL, 0) {
np = it.node;
+ match_id = of_match_node(idle_state_match, np);
+ if (!match_id)
+ continue;
ret = genpd_parse_state(&st[i++], np);
if (ret) {
pr_err
@@ -2155,8 +2168,11 @@ int of_genpd_parse_idle_states(struct device_node *dn,
}
}
- *n = count;
- *states = st;
+ *n = i;
+ if (!i)
+ kfree(st);
+ else
+ *states = st;
return 0;
}
@@ -2221,7 +2237,7 @@ static int pm_genpd_summary_one(struct seq_file *s,
if (WARN_ON(genpd->status >= ARRAY_SIZE(status_lookup)))
goto exit;
- if (genpd->status == GPD_STATE_POWER_OFF)
+ if (!genpd_status_on(genpd))
snprintf(state, sizeof(state), "%s-%u",
status_lookup[genpd->status], genpd->state_idx);
else
diff --git a/drivers/cpuidle/cpuidle-cps.c b/drivers/cpuidle/cpuidle-cps.c
index 926ba9871c62..12b9145913de 100644
--- a/drivers/cpuidle/cpuidle-cps.c
+++ b/drivers/cpuidle/cpuidle-cps.c
@@ -118,7 +118,7 @@ static void __init cps_cpuidle_unregister(void)
static int __init cps_cpuidle_init(void)
{
- int err, cpu, core, i;
+ int err, cpu, i;
struct cpuidle_device *device;
/* Detect supported states */
@@ -160,7 +160,6 @@ static int __init cps_cpuidle_init(void)
}
for_each_possible_cpu(cpu) {
- core = cpu_data[cpu].core;
device = &per_cpu(cpuidle_dev, cpu);
device->cpu = cpu;
#ifdef CONFIG_ARCH_NEEDS_CPU_IDLE_COUPLED
diff --git a/drivers/cpuidle/cpuidle-powernv.c b/drivers/cpuidle/cpuidle-powernv.c
index cda8f62d555b..12409a519cc5 100644
--- a/drivers/cpuidle/cpuidle-powernv.c
+++ b/drivers/cpuidle/cpuidle-powernv.c
@@ -56,10 +56,9 @@ static int snooze_loop(struct cpuidle_device *dev,
snooze_exit_time = get_tb() + snooze_timeout;
ppc64_runlatch_off();
+ HMT_very_low();
while (!need_resched()) {
- HMT_low();
- HMT_very_low();
- if (snooze_timeout_en && get_tb() > snooze_exit_time)
+ if (likely(snooze_timeout_en) && get_tb() > snooze_exit_time)
break;
}
@@ -215,11 +214,25 @@ static inline void add_powernv_state(int index, const char *name,
stop_psscr_table[index].mask = psscr_mask;
}
+/*
+ * Returns 0 if prop1_len == prop2_len. Else returns -1
+ */
+static inline int validate_dt_prop_sizes(const char *prop1, int prop1_len,
+ const char *prop2, int prop2_len)
+{
+ if (prop1_len == prop2_len)
+ return 0;
+
+ pr_warn("cpuidle-powernv: array sizes don't match for %s and %s\n",
+ prop1, prop2);
+ return -1;
+}
+
static int powernv_add_idle_states(void)
{
struct device_node *power_mgt;
int nr_idle_states = 1; /* Snooze */
- int dt_idle_states;
+ int dt_idle_states, count;
u32 latency_ns[CPUIDLE_STATE_MAX];
u32 residency_ns[CPUIDLE_STATE_MAX];
u32 flags[CPUIDLE_STATE_MAX];
@@ -244,6 +257,21 @@ static int powernv_add_idle_states(void)
goto out;
}
+ count = of_property_count_u32_elems(power_mgt,
+ "ibm,cpu-idle-state-latencies-ns");
+
+ if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags", dt_idle_states,
+ "ibm,cpu-idle-state-latencies-ns",
+ count) != 0)
+ goto out;
+
+ count = of_property_count_strings(power_mgt,
+ "ibm,cpu-idle-state-names");
+ if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags", dt_idle_states,
+ "ibm,cpu-idle-state-names",
+ count) != 0)
+ goto out;
+
/*
* Since snooze is used as first idle state, max idle states allowed is
* CPUIDLE_STATE_MAX -1
@@ -278,6 +306,22 @@ static int powernv_add_idle_states(void)
has_stop_states = (flags[0] &
(OPAL_PM_STOP_INST_FAST | OPAL_PM_STOP_INST_DEEP));
if (has_stop_states) {
+ count = of_property_count_u64_elems(power_mgt,
+ "ibm,cpu-idle-state-psscr");
+ if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags",
+ dt_idle_states,
+ "ibm,cpu-idle-state-psscr",
+ count) != 0)
+ goto out;
+
+ count = of_property_count_u64_elems(power_mgt,
+ "ibm,cpu-idle-state-psscr-mask");
+ if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags",
+ dt_idle_states,
+ "ibm,cpu-idle-state-psscr-mask",
+ count) != 0)
+ goto out;
+
if (of_property_read_u64_array(power_mgt,
"ibm,cpu-idle-state-psscr", psscr_val, dt_idle_states)) {
pr_warn("cpuidle-powernv: missing ibm,cpu-idle-state-psscr in DT\n");
@@ -292,8 +336,21 @@ static int powernv_add_idle_states(void)
}
}
- rc = of_property_read_u32_array(power_mgt,
- "ibm,cpu-idle-state-residency-ns", residency_ns, dt_idle_states);
+ count = of_property_count_u32_elems(power_mgt,
+ "ibm,cpu-idle-state-residency-ns");
+
+ if (count < 0) {
+ rc = count;
+ } else if (validate_dt_prop_sizes("ibm,cpu-idle-state-flags",
+ dt_idle_states,
+ "ibm,cpu-idle-state-residency-ns",
+ count) != 0) {
+ goto out;
+ } else {
+ rc = of_property_read_u32_array(power_mgt,
+ "ibm,cpu-idle-state-residency-ns",
+ residency_ns, dt_idle_states);
+ }
for (i = 0; i < dt_idle_states; i++) {
unsigned int exit_latency, target_residency;
diff --git a/drivers/devfreq/governor.h b/drivers/devfreq/governor.h
index 71576b8bdfef..a4f2fa1091e4 100644
--- a/drivers/devfreq/governor.h
+++ b/drivers/devfreq/governor.h
@@ -25,6 +25,35 @@
#define DEVFREQ_GOV_SUSPEND 0x4
#define DEVFREQ_GOV_RESUME 0x5
+/**
+ * struct devfreq_governor - Devfreq policy governor
+ * @node: list node - contains registered devfreq governors
+ * @name: Governor's name
+ * @immutable: Immutable flag for governor. If the value is 1,
+ * this govenror is never changeable to other governor.
+ * @get_target_freq: Returns desired operating frequency for the device.
+ * Basically, get_target_freq will run
+ * devfreq_dev_profile.get_dev_status() to get the
+ * status of the device (load = busy_time / total_time).
+ * If no_central_polling is set, this callback is called
+ * only with update_devfreq() notified by OPP.
+ * @event_handler: Callback for devfreq core framework to notify events
+ * to governors. Events include per device governor
+ * init and exit, opp changes out of devfreq, suspend
+ * and resume of per device devfreq during device idle.
+ *
+ * Note that the callbacks are called with devfreq->lock locked by devfreq.
+ */
+struct devfreq_governor {
+ struct list_head node;
+
+ const char name[DEVFREQ_NAME_LEN];
+ const unsigned int immutable;
+ int (*get_target_freq)(struct devfreq *this, unsigned long *freq);
+ int (*event_handler)(struct devfreq *devfreq,
+ unsigned int event, void *data);
+};
+
/* Caution: devfreq->lock must be locked before calling update_devfreq */
extern int update_devfreq(struct devfreq *devfreq);
diff --git a/drivers/power/avs/rockchip-io-domain.c b/drivers/power/avs/rockchip-io-domain.c
index 56bce1908be2..85812521b6ba 100644
--- a/drivers/power/avs/rockchip-io-domain.c
+++ b/drivers/power/avs/rockchip-io-domain.c
@@ -43,6 +43,10 @@
#define RK3288_SOC_CON2_FLASH0 BIT(7)
#define RK3288_SOC_FLASH_SUPPLY_NUM 2
+#define RK3328_SOC_CON4 0x410
+#define RK3328_SOC_CON4_VCCIO2 BIT(7)
+#define RK3328_SOC_VCCIO2_SUPPLY_NUM 1
+
#define RK3368_SOC_CON15 0x43c
#define RK3368_SOC_CON15_FLASH0 BIT(14)
#define RK3368_SOC_FLASH_SUPPLY_NUM 2
@@ -166,6 +170,25 @@ static void rk3288_iodomain_init(struct rockchip_iodomain *iod)
dev_warn(iod->dev, "couldn't update flash0 ctrl\n");
}
+static void rk3328_iodomain_init(struct rockchip_iodomain *iod)
+{
+ int ret;
+ u32 val;
+
+ /* if no vccio2 supply we should leave things alone */
+ if (!iod->supplies[RK3328_SOC_VCCIO2_SUPPLY_NUM].reg)
+ return;
+
+ /*
+ * set vccio2 iodomain to also use this framework
+ * instead of a special gpio.
+ */
+ val = RK3328_SOC_CON4_VCCIO2 | (RK3328_SOC_CON4_VCCIO2 << 16);
+ ret = regmap_write(iod->grf, RK3328_SOC_CON4, val);
+ if (ret < 0)
+ dev_warn(iod->dev, "couldn't update vccio2 vsel ctrl\n");
+}
+
static void rk3368_iodomain_init(struct rockchip_iodomain *iod)
{
int ret;
@@ -247,6 +270,20 @@ static const struct rockchip_iodomain_soc_data soc_data_rk3288 = {
.init = rk3288_iodomain_init,
};
+static const struct rockchip_iodomain_soc_data soc_data_rk3328 = {
+ .grf_offset = 0x410,
+ .supply_names = {
+ "vccio1",
+ "vccio2",
+ "vccio3",
+ "vccio4",
+ "vccio5",
+ "vccio6",
+ "pmuio",
+ },
+ .init = rk3328_iodomain_init,
+};
+
static const struct rockchip_iodomain_soc_data soc_data_rk3368 = {
.grf_offset = 0x900,
.supply_names = {
@@ -312,6 +349,10 @@ static const struct of_device_id rockchip_iodomain_match[] = {
.data = (void *)&soc_data_rk3288
},
{
+ .compatible = "rockchip,rk3328-io-voltage-domain",
+ .data = (void *)&soc_data_rk3328
+ },
+ {
.compatible = "rockchip,rk3368-io-voltage-domain",
.data = (void *)&soc_data_rk3368
},