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PM / Domains: Allow OF lookup for multi PM domain case from ->attach_dev() 

A genpd provider that uses the ->attach_dev() callback to look up
resources for a device fails to do so when the device has multiple
PM domains attached.  That is because when genpd invokes the
->attach_dev() callback, it passes the allocated virtual device as
the in-parameter.

To address this problem, simply assign the dev->of_node for the
virtual device, based upon the original device's OF node.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Niklas Cassel <niklas.cassel@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
hifive-unleashed-5.2
Ulf Hansson 2019-04-18 12:27:56 +02:00 committed by Rafael J. Wysocki
parent 71b77697af
commit e8b04de9da
1 changed files with 7 additions and 5 deletions
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12
drivers/base/power/domain.c
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@ -2272,6 +2272,7 @@ EXPORT_SYMBOL_GPL(of_genpd_remove_last);
static void genpd_release_dev(struct device *dev)
{
of_node_put(dev->of_node);
kfree(dev);
}
@ -2333,14 +2334,14 @@ static void genpd_dev_pm_sync(struct device *dev)
genpd_queue_power_off_work(pd);
}
static int __genpd_dev_pm_attach(struct device *dev, struct device_node *np,
unsigned int index, bool power_on)
static int __genpd_dev_pm_attach(struct device *dev, unsigned int index,
bool power_on)
{
struct of_phandle_args pd_args;
struct generic_pm_domain *pd;
int ret;
ret = of_parse_phandle_with_args(np, "power-domains",
ret = of_parse_phandle_with_args(dev->of_node, "power-domains",
"#power-domain-cells", index, &pd_args);
if (ret < 0)
return ret;
@ -2408,7 +2409,7 @@ int genpd_dev_pm_attach(struct device *dev)
"#power-domain-cells") != 1)
return 0;
return __genpd_dev_pm_attach(dev, dev->of_node, 0, true);
return __genpd_dev_pm_attach(dev, 0, true);
}
EXPORT_SYMBOL_GPL(genpd_dev_pm_attach);
@ -2452,6 +2453,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev,
dev_set_name(virt_dev, "genpd:%u:%s", index, dev_name(dev));
virt_dev->bus = &genpd_bus_type;
virt_dev->release = genpd_release_dev;
virt_dev->of_node = of_node_get(dev->of_node);
ret = device_register(virt_dev);
if (ret) {
@ -2460,7 +2462,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev,
}
/* Try to attach the device to the PM domain at the specified index. */
ret = __genpd_dev_pm_attach(virt_dev, dev->of_node, index, false);
ret = __genpd_dev_pm_attach(virt_dev, index, false);
if (ret < 1) {
device_unregister(virt_dev);
return ret ? ERR_PTR(ret) : NULL;