dt-bindings: iommu/rockchip: Add clock property

Add clock property, since we are going to control clocks in rockchip
iommu driver.

Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Joerg Roedel <jroedel@suse.de>

diff --git a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
index 2098f77..6ecefea 100644 (file)
--- a/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
+++ b/Documentation/devicetree/bindings/iommu/rockchip,iommu.txt
@@ -14,6 +14,11 @@ Required properties:
                     "single-master" device, and needs no additional information
                     to associate with its master device.  See:
                     Documentation/devicetree/bindings/iommu/iommu.txt
+- clocks          : A list of clocks required for the IOMMU to be accessible by
+                    the host CPU.
+- clock-names     : Should contain the following:
+       "iface" - Main peripheral bus clock (PCLK/HCL) (required)
+       "aclk"  - AXI bus clock (required)
 
 Optional properties:
 - rockchip,disable-mmu-reset : Don't use the mmu reset operation.
@@ -27,5 +32,7 @@ Example:
                reg = <0xff940300 0x100>;
                interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
                interrupt-names = "vopl_mmu";
+               clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
+               clock-names = "aclk", "iface";
                #iommu-cells = <0>;
        };