PM: domains: Support required OPPs in dev_pm_domain_attach_list()

In the multiple PM domain case we need platform code to specify the index
of the corresponding required OPP in DT for a device, which is what
*_opp_attach_genpd() is there to help us with.

However, attaching a device to its PM domains is in general better done
with dev_pm_domain_attach_list(). To avoid having two different ways to
manage this and to prepare for the removal of *_opp_attach_genpd(), let's
extend dev_pm_domain_attach|detach_list() to manage the required OPPs too.

Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Link: https://lore.kernel.org/r/20241002122232.194245-5-ulf.hansson@linaro.org

1 files changed, 8 insertions, 0 deletions

diff --git a/include/linux/pm_domain.h b/include/linux/pm_domain.h
index b637ec14025f..92f9d56f623d 100644
--- a/include/linux/pm_domain.h
+++ b/include/linux/pm_domain.h
@@ -30,9 +30,16 @@
  *				supplier and its PM domain when creating the
  *				device-links.
  *
+ * PD_FLAG_REQUIRED_OPP:	Assign required_devs for the required OPPs. The
+ *				index of the required OPP must correspond to the
+ *				index in the array of the pd_names. If pd_names
+ *				isn't specified, the index just follows the
+ *				index for the attached PM domain.
+ *
  */
 #define PD_FLAG_NO_DEV_LINK		BIT(0)
 #define PD_FLAG_DEV_LINK_ON		BIT(1)
+#define PD_FLAG_REQUIRED_OPP		BIT(2)
 
 struct dev_pm_domain_attach_data {
 	const char * const *pd_names;
@@ -43,6 +50,7 @@ struct dev_pm_domain_attach_data {
 struct dev_pm_domain_list {
 	struct device **pd_devs;
 	struct device_link **pd_links;
+	u32 *opp_tokens;
 	u32 num_pds;
 };