slots: Add power limit support

Add support for sourcing power limit information from either the DT slot heirachy or the slot table. Signed-off-by: Oliver O'Halloran <oohall@gmail.com> Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
open-power · Apr 11, 2018 · d15e2e5 · d15e2e5
1 parent f10feca
commit d15e2e5
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diff --git a/platforms/astbmc/astbmc.h b/platforms/astbmc/astbmc.h
@@ -39,6 +39,7 @@ struct slot_table_entry {
 	uint32_t location;
 	const char *name;
 	const struct slot_table_entry *children;
+	uint8_t power_limit;
 };
 
 /*

diff --git a/platforms/astbmc/slots.c b/platforms/astbmc/slots.c
@@ -121,6 +121,7 @@ void slot_table_get_slot_info(struct phb *phb, struct pci_device *pd)
 
 	slot->pluggable = !!(ent->etype == st_pluggable_slot);
 	slot->ops.add_properties = slot_table_add_properties;
+	slot->power_limit = ent->power_limit;
 	slot->data = (void *)ent;
 }
 
@@ -141,6 +142,7 @@ void dt_slot_get_slot_info(struct phb *phb, struct pci_device *pd)
 	struct dt_node *slot_np;
 	struct pci_slot *slot;
 	const char *name = NULL;
+	uint32_t power_limit = 0;
 	bool pluggable = false;
 
 	if (!pd || pd->slot)
@@ -150,6 +152,8 @@ void dt_slot_get_slot_info(struct phb *phb, struct pci_device *pd)
 	if (slot_np) {
 		pluggable = dt_has_node_property(slot_np,
 					"ibm,pluggable", NULL);
+		power_limit = dt_prop_get_u32_def(slot_np,
+					"ibm,power-limit", 0);
 		name = dt_prop_get_def(slot_np, "ibm,slot-label", NULL);
 	}
 
@@ -169,6 +173,7 @@ void dt_slot_get_slot_info(struct phb *phb, struct pci_device *pd)
 
 	slot->ops.add_properties = dt_slot_add_properties;
 	slot->pluggable = pluggable;
+	slot->power_limit = power_limit;
 	slot->data = (void *)slot_np;
 }