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| author | Viresh Kumar <viresh.kumar@linaro.org> | 2019-07-17 11:20:17 +0530 |
|---|---|---|
| committer | Viresh Kumar <viresh.kumar@linaro.org> | 2019-07-26 13:23:31 +0530 |
| commit | baea35e4db17a72145c84a401f70d496c8ebf833 (patch) | |
| tree | 15fcec90c2143ce73d41a623cd056bb1bd57a357 /drivers/opp/core.c | |
| parent | 5f9e832c137075045d15cd6899ab0505cfb2ca4b (diff) | |
| download | linux-baea35e4db17a72145c84a401f70d496c8ebf833.tar.gz | |
opp: Not all power-domains are scalable
A device may have multiple power-domains and not all of them may be
scalable (i.e. support performance states). But
dev_pm_opp_attach_genpd() doesn't take that into account currently.
Fix that by not verifying the names argument with "power-domain-names"
DT property and finding the index into the required-opps array. The
names argument will anyway get verified later on when we call
dev_pm_domain_attach_by_name().
Fixes: 6319aee10e53 ("opp: Attach genpds to devices from within OPP core")
Reported-by: Rajendra Nayak <rnayak@codeaurora.org>
Tested-by: Rajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Diffstat (limited to 'drivers/opp/core.c')
| -rw-r--r-- | drivers/opp/core.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c index c094d5d20fd7..08b830f84d8c 100644 --- a/drivers/opp/core.c +++ b/drivers/opp/core.c @@ -1784,12 +1784,15 @@ static void _opp_detach_genpd(struct opp_table *opp_table) * * This helper needs to be called once with a list of all genpd to attach. * Otherwise the original device structure will be used instead by the OPP core. + * + * The order of entries in the names array must match the order in which + * "required-opps" are added in DT. */ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names) { struct opp_table *opp_table; struct device *virt_dev; - int index, ret = -EINVAL; + int index = 0, ret = -EINVAL; const char **name = names; opp_table = dev_pm_opp_get_opp_table(dev); @@ -1815,14 +1818,6 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names goto unlock; while (*name) { - index = of_property_match_string(dev->of_node, - "power-domain-names", *name); - if (index < 0) { - dev_err(dev, "Failed to find power domain: %s (%d)\n", - *name, index); - goto err; - } - if (index >= opp_table->required_opp_count) { dev_err(dev, "Index can't be greater than required-opp-count - 1, %s (%d : %d)\n", *name, opp_table->required_opp_count, index); @@ -1843,6 +1838,7 @@ struct opp_table *dev_pm_opp_attach_genpd(struct device *dev, const char **names } opp_table->genpd_virt_devs[index] = virt_dev; + index++; name++; } |