1 files changed, 21 insertions, 2 deletions

diff --git a/drivers/soc/ti/ti_sci_pm_domains.c b/drivers/soc/ti/ti_sci_pm_domains.c
index 97817dd7ba24..8c2a2f23982c 100644
--- a/drivers/soc/ti/ti_sci_pm_domains.c
+++ b/drivers/soc/ti/ti_sci_pm_domains.c
@@ -15,15 +15,19 @@
 #include <linux/pm_domain.h>
 #include <linux/slab.h>
 #include <linux/soc/ti/ti_sci_protocol.h>
+#include <dt-bindings/soc/ti,sci_pm_domain.h>
 
 /**
  * struct ti_sci_genpd_dev_data: holds data needed for every device attached
  *				 to this genpd
  * @idx: index of the device that identifies it with the system
  *	 control processor.
+ * @exclusive: Permissions for exclusive request or shared request of the
+ *	       device.
  */
 struct ti_sci_genpd_dev_data {
 	int idx;
+	u8 exclusive;
 };
 
 /**
@@ -55,6 +59,14 @@ static int ti_sci_dev_id(struct device *dev)
 	return sci_dev_data->idx;
 }
 
+static u8 is_ti_sci_dev_exclusive(struct device *dev)
+{
+	struct generic_pm_domain_data *genpd_data = dev_gpd_data(dev);
+	struct ti_sci_genpd_dev_data *sci_dev_data = genpd_data->data;
+
+	return sci_dev_data->exclusive;
+}
+
 /**
  * ti_sci_dev_to_sci_handle(): get pointer to ti_sci_handle
  * @dev: pointer to device associated with this genpd
@@ -79,7 +91,10 @@ static int ti_sci_dev_start(struct device *dev)
 	const struct ti_sci_handle *ti_sci = ti_sci_dev_to_sci_handle(dev);
 	int idx = ti_sci_dev_id(dev);
 
-	return ti_sci->ops.dev_ops.get_device(ti_sci, idx);
+	if (is_ti_sci_dev_exclusive(dev))
+		return ti_sci->ops.dev_ops.get_device_exclusive(ti_sci, idx);
+	else
+		return ti_sci->ops.dev_ops.get_device(ti_sci, idx);
 }
 
 /**
@@ -110,7 +125,7 @@ static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain,
 	if (ret < 0)
 		return ret;
 
-	if (pd_args.args_count != 1)
+	if (pd_args.args_count != 1 && pd_args.args_count != 2)
 		return -EINVAL;
 
 	idx = pd_args.args[0];
@@ -128,6 +143,10 @@ static int ti_sci_pd_attach_dev(struct generic_pm_domain *domain,
 		return -ENOMEM;
 
 	sci_dev_data->idx = idx;
+	/* Enable the exclusive permissions by default */
+	sci_dev_data->exclusive = TI_SCI_PD_EXCLUSIVE;
+	if (pd_args.args_count == 2)
+		sci_dev_data->exclusive = pd_args.args[1] & 0x1;
 
 	genpd_data = dev_gpd_data(dev);
 	genpd_data->data = sci_dev_data;