fpga: region: Add fpga-region property 'encrypted-fpga-config'

Add fpga-region property to allow passing the fact that the bitstream is
encrypted to the fpga-region and ultimately to the low-level driver.

Signed-off-by: Moritz Fischer <mdf@kernel.org>
Acked-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Alan Tull <atull@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/drivers/fpga/fpga-region.c b/drivers/fpga/fpga-region.c
index 3222fdbad75a..2fe2a52c66ca 100644
--- a/drivers/fpga/fpga-region.c
+++ b/drivers/fpga/fpga-region.c
@@ -337,8 +337,9 @@ static int child_regions_with_firmware(struct device_node *overlay)
  * The overlay must add either firmware-name or external-fpga-config property
  * to the FPGA Region.
  *
- *   firmware-name        : program the FPGA
- *   external-fpga-config : FPGA is already programmed
+ *   firmware-name         : program the FPGA
+ *   external-fpga-config  : FPGA is already programmed
+ *   encrypted-fpga-config : FPGA bitstream is encrypted
  *
  * The overlay can add other FPGA regions, but child FPGA regions cannot have a
  * firmware-name property since those regions don't exist yet.
@@ -373,6 +374,9 @@ static int fpga_region_notify_pre_apply(struct fpga_region *region,
         if (of_property_read_bool(nd->overlay, "external-fpga-config"))
                 info->flags |= FPGA_MGR_EXTERNAL_CONFIG;
 
+        if (of_property_read_bool(nd->overlay, "encrypted-fpga-config"))
+                info->flags |= FPGA_MGR_ENCRYPTED_BITSTREAM;
+
         of_property_read_string(nd->overlay, "firmware-name", &firmware_name);
 
         of_property_read_u32(nd->overlay, "region-unfreeze-timeout-us",