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-rw-r--r--drivers/soc/ti/ti_sci_pm_domains.c23
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;