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OPP: Add support for parsing the 'opp-level' property 

Now that the OPP bindings are updated to include an optional
'opp-level' property, add support to parse it from device tree
and store it as part of dev_pm_opp structure.
Also add and export an helper 'dev_pm_opp_get_level()' that can be
used to get the level value read from device tree when present.

Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Andy Gross <andy.gross@linaro.org>
This commit is contained in:
Rajendra Nayak 2019-01-10 09:32:02 +05:30 committed by Andy Gross
parent cea8e2f393
commit 5b93ac5423
4 changed files with 29 additions and 0 deletions
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18
drivers/opp/core.c
View File

@ -130,6 +130,24 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
/**
* dev_pm_opp_get_level() - Gets the level corresponding to an available opp
* @opp: opp for which level value has to be returned for
*
* Return: level read from device tree corresponding to the opp, else
* return 0.
*/
unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
{
if (IS_ERR_OR_NULL(opp) || !opp->available) {
pr_err("%s: Invalid parameters\n", __func__);
return 0;
}
return opp->level;
}
EXPORT_SYMBOL_GPL(dev_pm_opp_get_level);
/**
* dev_pm_opp_is_turbo() - Returns if opp is turbo OPP or not
* @opp: opp for which turbo mode is being verified

2
drivers/opp/of.c
View File

@ -594,6 +594,8 @@ static struct dev_pm_opp *_opp_add_static_v2(struct opp_table *opp_table,
new_opp->rate = (unsigned long)rate;
}
of_property_read_u32(np, "opp-level", &new_opp->level);
/* Check if the OPP supports hardware's hierarchy of versions or not */
if (!_opp_is_supported(dev, opp_table, np)) {
dev_dbg(dev, "OPP not supported by hardware: %llu\n", rate);

2
drivers/opp/opp.h
View File

@ -60,6 +60,7 @@ extern struct list_head opp_tables;
* @suspend: true if suspend OPP
* @pstate: Device's power domain's performance state.
* @rate: Frequency in hertz
* @level: Performance level
* @supplies: Power supplies voltage/current values
* @clock_latency_ns: Latency (in nanoseconds) of switching to this OPP's
* frequency from any other OPP's frequency.
@ -80,6 +81,7 @@ struct dev_pm_opp {
bool suspend;
unsigned int pstate;
unsigned long rate;
unsigned int level;
struct dev_pm_opp_supply *supplies;

7
include/linux/pm_opp.h
View File

@ -86,6 +86,8 @@ unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp);
int dev_pm_opp_get_opp_count(struct device *dev);
@ -157,6 +159,11 @@ static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
return 0;
}
static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
{
return 0;
}
static inline bool dev_pm_opp_is_turbo(struct dev_pm_opp *opp)
{
return false;