[PATCH v3 2/3] dt-bindings: phy: add DT bindings for usb2-phy grf

[Meng Dongyang <daniel.meng@rock-chips.com>]

Adds the device tree bindings description for usb2-phy grf
of RK3328 platform.

Changes in v2:
 - add usb2-phy grf specification
Chagnes in v3:
 - remove the example of usb2-phy grf

Signed-off-by: Meng Dongyang <daniel.meng@rock-chips.com>
---
 Documentation/devicetree/bindings/soc/rockchip/grf.txt | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Documentation/devicetree/bindings/soc/rockchip/grf.txt b/Documentation/devicetree/bindings/soc/rockchip/grf.txt
index 013e71a..af5b44d 100644
--- a/Documentation/devicetree/bindings/soc/rockchip/grf.txt
+++ b/Documentation/devicetree/bindings/soc/rockchip/grf.txt
@@ -7,6 +7,8 @@ From RK3368 SoCs, the GRF is divided into two sections,
 - GRF, used for general non-secure system,
 - PMUGRF, used for always on system
 
+On RK3328 SoCs, the GRF adds a section for USB2PHYGRF,
+
 Required Properties:
 
 - compatible: GRF should be one of the followings
@@ -19,6 +21,8 @@ Required Properties:
 - compatible: PMUGRF should be one of the followings
    - "rockchip,rk3368-pmugrf", "syscon": for rk3368
    - "rockchip,rk3399-pmugrf", "syscon": for rk3399
+- compatible: USB2PHYGRF should be one of the followings
+   - "rockchip,rk3328-usb2phy-grf", "syscon": for rk3328
 - reg: physical base address of the controller and length of memory mapped
   region.
 
-- 
1.9.1