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cpuidle: dt_idle_genpd: Add helper function to remove genpd topology

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Genpd parent and child domain topology created using dt_idle_pd_init_topology()
needs to be removed during error cases.

Add new helper function dt_idle_pd_remove_topology() for same.

Cc: stable@vger.kernel.org
Reviewed-by: Ulf Hanssson <ulf.hansson@linaro.org>
Signed-off-by: Maulik Shah <quic_mkshah@quicinc.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Maulik Shah 2023-07-03 14:25:53 +05:30 committed by Ulf Hansson
parent 52a93d39b1
commit 9a8fa00dad
2 changed files with 31 additions and 0 deletions
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24
drivers/cpuidle/dt_idle_genpd.c
View file

@ -152,6 +152,30 @@ int dt_idle_pd_init_topology(struct device_node *np)
return 0;
}
int dt_idle_pd_remove_topology(struct device_node *np)
{
struct device_node *node;
struct of_phandle_args child, parent;
int ret;
for_each_child_of_node(np, node) {
if (of_parse_phandle_with_args(node, "power-domains",
"#power-domain-cells", 0, &parent))
continue;
child.np = node;
child.args_count = 0;
ret = of_genpd_remove_subdomain(&parent, &child);
of_node_put(parent.np);
if (ret) {
of_node_put(node);
return ret;
}
}
return 0;
}
struct device *dt_idle_attach_cpu(int cpu, const char *name)
{
struct device *dev;

7
drivers/cpuidle/dt_idle_genpd.h
View file

@ -14,6 +14,8 @@ struct generic_pm_domain *dt_idle_pd_alloc(struct device_node *np,
int dt_idle_pd_init_topology(struct device_node *np);
int dt_idle_pd_remove_topology(struct device_node *np);
struct device *dt_idle_attach_cpu(int cpu, const char *name);
void dt_idle_detach_cpu(struct device *dev);
@ -36,6 +38,11 @@ static inline int dt_idle_pd_init_topology(struct device_node *np)
return 0;
}
static inline int dt_idle_pd_remove_topology(struct device_node *np)
{
return 0;
}
static inline struct device *dt_idle_attach_cpu(int cpu, const char *name)
{
return NULL;