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opp: Add support for parsing interconnect bandwidth

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The OPP bindings now support bandwidth values, so add support to parse it
from device tree and store it into the new dev_pm_opp_icc_bw struct, which
is part of the dev_pm_opp.

Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Reviewed-by: Matthias Kaehlcke <mka@chromium.org>
[ Viresh: Create _read_bw() and use it, renamed _of_find_icc_paths() to
	  dev_pm_opp_of_find_icc_paths(), exported it and made opp_table
	  argument optional. Also drop the depends on from Kconfig. ]
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
This commit is contained in:
Georgi Djakov
2020-05-12 15:53:21 +03:00
committed by Viresh Kumar
parent 90562c8182
commit 6d3f922c46
4 changed files with 162 additions and 5 deletions
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18
include/linux/pm_opp.h
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@@ -41,6 +41,18 @@ struct dev_pm_opp_supply {
unsigned long u_amp;
};
/**
* struct dev_pm_opp_icc_bw - Interconnect bandwidth values
* @avg: Average bandwidth corresponding to this OPP (in icc units)
* @peak: Peak bandwidth corresponding to this OPP (in icc units)
*
* This structure stores the bandwidth values for a single interconnect path.
*/
struct dev_pm_opp_icc_bw {
u32 avg;
u32 peak;
};
/**
* struct dev_pm_opp_info - OPP freq/voltage/current values
* @rate: Target clk rate in hz
@@ -360,6 +372,7 @@ int dev_pm_opp_of_get_sharing_cpus(struct device *cpu_dev, struct cpumask *cpuma
struct device_node *dev_pm_opp_of_get_opp_desc_node(struct device *dev);
struct device_node *dev_pm_opp_get_of_node(struct dev_pm_opp *opp);
int of_get_required_opp_performance_state(struct device_node *np, int index);
int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table);
void dev_pm_opp_of_register_em(struct cpumask *cpus);
#else
static inline int dev_pm_opp_of_add_table(struct device *dev)
@@ -408,6 +421,11 @@ static inline int of_get_required_opp_performance_state(struct device_node *np,
{
return -ENOTSUPP;
}
static inline int dev_pm_opp_of_find_icc_paths(struct device *dev, struct opp_table *opp_table)
{
return -ENOTSUPP;
}
#endif
#endif /* __LINUX_OPP_H__ */