[PATCH V2 3/8] PM / OPP: Manage supply's voltage/current in a separate structure

Viresh Kumar
2016-10-20T08:49:04Z

This is a preparatory step for multiple regulator per device support.
Move the voltage/current variables to a new structure.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
---
drivers/base/power/opp/core.c | 44 +++++++++++++++++++++-------------------
drivers/base/power/opp/debugfs.c | 8 ++++----
drivers/base/power/opp/of.c | 18 ++++++++--------
drivers/base/power/opp/opp.h | 27 ++++++++++++++++--------
4 files changed, 55 insertions(+), 42 deletions(-)

diff --git a/drivers/base/power/opp/core.c b/drivers/base/power/opp/core.c
index 056527a3fb4e..8d6006151c9a 100644
--- a/drivers/base/power/opp/core.c
+++ b/drivers/base/power/opp/core.c
@@ -112,7 +112,7 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp)
if (IS_ERR_OR_NULL(tmp_opp))
pr_err("%s: Invalid parameters\n", __func__);
else
- v = tmp_opp->u_volt;
+ v = tmp_opp->supply.u_volt;

return v;
}
@@ -246,10 +246,10 @@ unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev)
if (!opp->available)
continue;

- if (opp->u_volt_min < min_uV)
- min_uV = opp->u_volt_min;
- if (opp->u_volt_max > max_uV)
- max_uV = opp->u_volt_max;
+ if (opp->supply.u_volt_min < min_uV)
+ min_uV = opp->supply.u_volt_min;
+ if (opp->supply.u_volt_max > max_uV)
+ max_uV = opp->supply.u_volt_max;
}

rcu_read_unlock();
@@ -637,14 +637,14 @@ int dev_pm_opp_set_rate(struct device *dev, unsigned long target_freq)
if (IS_ERR(old_opp)) {
old_u_volt = 0;
} else {
- old_u_volt = old_opp->u_volt;
- old_u_volt_min = old_opp->u_volt_min;
- old_u_volt_max = old_opp->u_volt_max;
+ old_u_volt = old_opp->supply.u_volt;
+ old_u_volt_min = old_opp->supply.u_volt_min;
+ old_u_volt_max = old_opp->supply.u_volt_max;
}

- u_volt = opp->u_volt;
- u_volt_min = opp->u_volt_min;
- u_volt_max = opp->u_volt_max;
+ u_volt = opp->supply.u_volt;
+ u_volt_min = opp->supply.u_volt_min;
+ u_volt_max = opp->supply.u_volt_max;

reg = opp_table->regulator;

@@ -957,10 +957,11 @@ static bool _opp_supported_by_regulators(struct dev_pm_opp *opp,
struct regulator *reg = opp_table->regulator;

if (!IS_ERR(reg) &&
- !regulator_is_supported_voltage(reg, opp->u_volt_min,
- opp->u_volt_max)) {
+ !regulator_is_supported_voltage(reg, opp->supply.u_volt_min,
+ opp->supply.u_volt_max)) {
pr_warn("%s: OPP minuV: %lu maxuV: %lu, not supported by regulator\n",
- __func__, opp->u_volt_min, opp->u_volt_max);
+ __func__, opp->supply.u_volt_min,
+ opp->supply.u_volt_max);
return false;
}

@@ -993,11 +994,12 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp,

/* Duplicate OPPs */
dev_warn(dev, "%s: duplicate OPPs detected. Existing: freq: %lu, volt: %lu, enabled: %d. New: freq: %lu, volt: %lu, enabled: %d\n",
- __func__, opp->rate, opp->u_volt, opp->available,
- new_opp->rate, new_opp->u_volt, new_opp->available);
+ __func__, opp->rate, opp->supply.u_volt,
+ opp->available, new_opp->rate, new_opp->supply.u_volt,
+ new_opp->available);

- return opp->available && new_opp->u_volt == opp->u_volt ?
- 0 : -EEXIST;
+ return opp->available &&
+ new_opp->supply.u_volt == opp->supply.u_volt ? 0 : -EEXIST;
}

new_opp->opp_table = opp_table;
@@ -1064,9 +1066,9 @@ int _opp_add_v1(struct device *dev, unsigned long freq, long u_volt,
/* populate the opp table */
new_opp->rate = freq;
tol = u_volt * opp_table->voltage_tolerance_v1 / 100;
- new_opp->u_volt = u_volt;
- new_opp->u_volt_min = u_volt - tol;
- new_opp->u_volt_max = u_volt + tol;
+ new_opp->supply.u_volt = u_volt;
+ new_opp->supply.u_volt_min = u_volt - tol;
+ new_opp->supply.u_volt_max = u_volt + tol;
new_opp->available = true;
new_opp->dynamic = dynamic;

diff --git a/drivers/base/power/opp/debugfs.c b/drivers/base/power/opp/debugfs.c
index ef1ae6b52042..c897676ca35f 100644
--- a/drivers/base/power/opp/debugfs.c
+++ b/drivers/base/power/opp/debugfs.c
@@ -63,16 +63,16 @@ int opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)
if (!debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate))
return -ENOMEM;

- if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->u_volt))
+ if (!debugfs_create_ulong("u_volt_target", S_IRUGO, d, &opp->supply.u_volt))
return -ENOMEM;

- if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->u_volt_min))
+ if (!debugfs_create_ulong("u_volt_min", S_IRUGO, d, &opp->supply.u_volt_min))
return -ENOMEM;

- if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->u_volt_max))
+ if (!debugfs_create_ulong("u_volt_max", S_IRUGO, d, &opp->supply.u_volt_max))
return -ENOMEM;

- if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->u_amp))
+ if (!debugfs_create_ulong("u_amp", S_IRUGO, d, &opp->supply.u_amp))
return -ENOMEM;

if (!debugfs_create_ulong("clock_latency_ns", S_IRUGO, d,
diff --git a/drivers/base/power/opp/of.c b/drivers/base/power/opp/of.c
index 5552211e6fcd..b7fcd0a1b58b 100644
--- a/drivers/base/power/opp/of.c
+++ b/drivers/base/power/opp/of.c
@@ -148,14 +148,14 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
return -EINVAL;
}

- opp->u_volt = microvolt[0];
+ opp->supply.u_volt = microvolt[0];

if (count == 1) {
- opp->u_volt_min = opp->u_volt;
- opp->u_volt_max = opp->u_volt;
+ opp->supply.u_volt_min = opp->supply.u_volt;
+ opp->supply.u_volt_max = opp->supply.u_volt;
} else {
- opp->u_volt_min = microvolt[1];
- opp->u_volt_max = microvolt[2];
+ opp->supply.u_volt_min = microvolt[1];
+ opp->supply.u_volt_max = microvolt[2];
}

/* Search for "opp-microamp-<name>" */
@@ -173,7 +173,7 @@ static int opp_parse_supplies(struct dev_pm_opp *opp, struct device *dev,
}

if (prop && !of_property_read_u32(opp->np, name, &val))
- opp->u_amp = val;
+ opp->supply.u_amp = val;

return 0;
}
@@ -303,9 +303,9 @@ static int _opp_add_static_v2(struct device *dev, struct device_node *np)
mutex_unlock(&opp_table_lock);

pr_debug("%s: turbo:%d rate:%lu uv:%lu uvmin:%lu uvmax:%lu latency:%lu\n",
- __func__, new_opp->turbo, new_opp->rate, new_opp->u_volt,
- new_opp->u_volt_min, new_opp->u_volt_max,
- new_opp->clock_latency_ns);
+ __func__, new_opp->turbo, new_opp->rate,
+ new_opp->supply.u_volt, new_opp->supply.u_volt_min,
+ new_opp->supply.u_volt_max, new_opp->clock_latency_ns);

/*
* Notify the changes in the availability of the operable
diff --git a/drivers/base/power/opp/opp.h b/drivers/base/power/opp/opp.h
index fabd5ca1a083..1bda0d35c486 100644
--- a/drivers/base/power/opp/opp.h
+++ b/drivers/base/power/opp/opp.h
@@ -47,6 +47,22 @@ extern struct list_head opp_tables;
*/

/**
+ * struct dev_pm_opp_supply - Power supply voltage/current values
+ * @u_volt: Target voltage in microvolts corresponding to this OPP
+ * @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
+ * @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
+ * @u_amp: Maximum current drawn by the device in microamperes
+ *
+ * This structure stores the voltage/current values for a single power supply.
+ */
+struct dev_pm_opp_supply {
+ unsigned long u_volt;
+ unsigned long u_volt_min;
+ unsigned long u_volt_max;
+ unsigned long u_amp;
+};
+
+/**
* struct dev_pm_opp - Generic OPP description structure
* @node: opp table node. The nodes are maintained throughout the lifetime
* of boot. It is expected only an optimal set of OPPs are
@@ -61,10 +77,7 @@ extern struct list_head opp_tables;
* @turbo: true if turbo (boost) OPP
* @suspend: true if suspend OPP
* @rate: Frequency in hertz
- * @u_volt: Target voltage in microvolts corresponding to this OPP
- * @u_volt_min: Minimum voltage in microvolts corresponding to this OPP
- * @u_volt_max: Maximum voltage in microvolts corresponding to this OPP
- * @u_amp: Maximum current drawn by the device in microamperes
+ * @supply: Power supply voltage/current values
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
* frequency from any other OPP's frequency.
* @opp_table: points back to the opp_table struct this opp belongs to
@@ -83,10 +96,8 @@ struct dev_pm_opp {
bool suspend;
unsigned long rate;

- unsigned long u_volt;
- unsigned long u_volt_min;
- unsigned long u_volt_max;
- unsigned long u_amp;
+ struct dev_pm_opp_supply supply;
+
unsigned long clock_latency_ns;

struct opp_table *opp_table;
--
2.7.1.410.g6faf27b