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Message-Id: <26de96f200805b43634bcc2b4d9824b2e38b0f6b.1611738228.git.viresh.kumar@linaro.org>
Date: Wed, 27 Jan 2021 14:35:27 +0530
From: Viresh Kumar <viresh.kumar@...aro.org>
To: Viresh Kumar <vireshk@...nel.org>, Nishanth Menon <nm@...com>,
Stephen Boyd <sboyd@...nel.org>,
"Rafael J. Wysocki" <rjw@...ysocki.net>
Cc: Viresh Kumar <viresh.kumar@...aro.org>, linux-pm@...r.kernel.org,
Vincent Guittot <vincent.guittot@...aro.org>,
Dmitry Osipenko <digetx@...il.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] opp: Add dev_pm_opp_of_add_table_noclk()
A few drivers have device's clk but they don't want the OPP core to
handle that. Add a new helper for them, dev_pm_opp_of_add_table_noclk().
Signed-off-by: Viresh Kumar <viresh.kumar@...aro.org>
---
drivers/opp/core.c | 28 +++++++++++++++++-----------
drivers/opp/of.c | 26 ++++++++++++++++++++++----
drivers/opp/opp.h | 2 +-
include/linux/pm_opp.h | 6 ++++++
4 files changed, 46 insertions(+), 16 deletions(-)
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 9f6cf93cef3e..31abf460cd69 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1129,7 +1129,8 @@ struct opp_device *_add_opp_dev(const struct device *dev,
return opp_dev;
}
-static struct opp_table *_allocate_opp_table(struct device *dev, int index)
+static struct opp_table *_allocate_opp_table(struct device *dev, int index,
+ bool getclk)
{
struct opp_table *opp_table;
struct opp_device *opp_dev;
@@ -1158,14 +1159,18 @@ static struct opp_table *_allocate_opp_table(struct device *dev, int index)
_of_init_opp_table(opp_table, dev, index);
- /* Find clk for the device */
- opp_table->clk = clk_get(dev, NULL);
- if (IS_ERR(opp_table->clk)) {
- ret = PTR_ERR(opp_table->clk);
- if (ret == -EPROBE_DEFER)
- goto remove_opp_dev;
+ if (getclk) {
+ /* Find clk for the device */
+ opp_table->clk = clk_get(dev, NULL);
+ if (IS_ERR(opp_table->clk)) {
+ ret = PTR_ERR(opp_table->clk);
+ if (ret == -EPROBE_DEFER)
+ goto remove_opp_dev;
- dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
+ dev_dbg(dev, "%s: Couldn't find clock: %d\n", __func__, ret);
+ }
+ } else {
+ opp_table->clk = ERR_PTR(-ENODEV);
}
/* Find interconnect path(s) for the device */
@@ -1214,7 +1219,8 @@ void _get_opp_table_kref(struct opp_table *opp_table)
* uses the opp_tables_busy flag to indicate if another creator is in the middle
* of adding an OPP table and others should wait for it to finish.
*/
-struct opp_table *_add_opp_table_indexed(struct device *dev, int index)
+struct opp_table *_add_opp_table_indexed(struct device *dev, int index,
+ bool getclk)
{
struct opp_table *opp_table;
@@ -1249,7 +1255,7 @@ struct opp_table *_add_opp_table_indexed(struct device *dev, int index)
mutex_lock(&opp_table_lock);
} else {
- opp_table = _allocate_opp_table(dev, index);
+ opp_table = _allocate_opp_table(dev, index, getclk);
mutex_lock(&opp_table_lock);
if (!IS_ERR(opp_table))
@@ -1266,7 +1272,7 @@ struct opp_table *_add_opp_table_indexed(struct device *dev, int index)
struct opp_table *_add_opp_table(struct device *dev)
{
- return _add_opp_table_indexed(dev, 0);
+ return _add_opp_table_indexed(dev, 0, true);
}
struct opp_table *dev_pm_opp_get_opp_table(struct device *dev)
diff --git a/drivers/opp/of.c b/drivers/opp/of.c
index c6856dcf4c34..a905497c75f8 100644
--- a/drivers/opp/of.c
+++ b/drivers/opp/of.c
@@ -956,7 +956,7 @@ static int _of_add_opp_table_v1(struct device *dev, struct opp_table *opp_table)
return ret;
}
-static int _of_add_table_indexed(struct device *dev, int index)
+static int _of_add_table_indexed(struct device *dev, int index, bool getclk)
{
struct opp_table *opp_table;
int ret, count;
@@ -972,7 +972,7 @@ static int _of_add_table_indexed(struct device *dev, int index)
index = 0;
}
- opp_table = _add_opp_table_indexed(dev, index);
+ opp_table = _add_opp_table_indexed(dev, index, getclk);
if (IS_ERR(opp_table))
return PTR_ERR(opp_table);
@@ -1010,7 +1010,7 @@ static int _of_add_table_indexed(struct device *dev, int index)
*/
int dev_pm_opp_of_add_table(struct device *dev)
{
- return _of_add_table_indexed(dev, 0);
+ return _of_add_table_indexed(dev, 0, true);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
@@ -1026,10 +1026,28 @@ EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table);
*/
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
{
- return _of_add_table_indexed(dev, index);
+ return _of_add_table_indexed(dev, index, true);
}
EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table_indexed);
+/**
+ * dev_pm_opp_of_add_table_noclk() - Initialize indexed opp table from device
+ * tree without getting clk for device.
+ * @dev: device pointer used to lookup OPP table.
+ * @index: Index number.
+ *
+ * Register the initial OPP table with the OPP library for given device only
+ * using the "operating-points-v2" property. Do not try to get the clk for the
+ * device.
+ *
+ * Return: Refer to dev_pm_opp_of_add_table() for return values.
+ */
+int dev_pm_opp_of_add_table_noclk(struct device *dev, int index)
+{
+ return _of_add_table_indexed(dev, index, false);
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_of_add_table_noclk);
+
/* CPU device specific helpers */
/**
diff --git a/drivers/opp/opp.h b/drivers/opp/opp.h
index 4ced7ffa8158..edbf05df8b82 100644
--- a/drivers/opp/opp.h
+++ b/drivers/opp/opp.h
@@ -224,7 +224,7 @@ int _opp_add(struct device *dev, struct dev_pm_opp *new_opp, struct opp_table *o
int _opp_add_v1(struct opp_table *opp_table, struct device *dev, unsigned long freq, long u_volt, bool dynamic);
void _dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask, int last_cpu);
struct opp_table *_add_opp_table(struct device *dev);
-struct opp_table *_add_opp_table_indexed(struct device *dev, int index);
+struct opp_table *_add_opp_table_indexed(struct device *dev, int index, bool getclk);
void _put_opp_list_kref(struct opp_table *opp_table);
#ifdef CONFIG_OF
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index 979b208bc4a8..158158620dde 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -395,6 +395,7 @@ static inline int dev_pm_opp_sync_regulators(struct device *dev)
#if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
int dev_pm_opp_of_add_table(struct device *dev);
int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
+int dev_pm_opp_of_add_table_noclk(struct device *dev, int index);
void dev_pm_opp_of_remove_table(struct device *dev);
int dev_pm_opp_of_cpumask_add_table(const struct cpumask *cpumask);
void dev_pm_opp_of_cpumask_remove_table(const struct cpumask *cpumask);
@@ -419,6 +420,11 @@ static inline int dev_pm_opp_of_add_table_indexed(struct device *dev, int index)
return -ENOTSUPP;
}
+static inline int dev_pm_opp_of_add_table_noclk(struct device *dev, int index)
+{
+ return -ENOTSUPP;
+}
+
static inline void dev_pm_opp_of_remove_table(struct device *dev)
{
}
--
2.25.0.rc1.19.g042ed3e048af
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