[PATCH 05/10] phy: rockchip-usb: should be a child device of the GRF

[Kishon Vijay Abraham I]

From: Heiko Stuebner <he...@sntech.de>

The usb-phy is fully enclosed in the general register files (GRF).
Therefore as seen from the device-tree it shouldn't be a separate
platform-device but instead a sub-device of the GRF - using the
simply-mfd mechanism.

As the usb-phy is part of the kernel for some releases now, we keep
the old (and now deprecated) binding for compatibility purposes.

Signed-off-by: Heiko Stuebner <he...@sntech.de>
Signed-off-by: Kishon Vijay Abraham I <kis...@ti.com>
---
 .../devicetree/bindings/phy/rockchip-usb-phy.txt   |   27 ++++++++++++--------
 drivers/phy/phy-rockchip-usb.c                     |   15 ++++++++---
 2 files changed, 29 insertions(+), 13 deletions(-)

diff --git a/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt 
b/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
index 68498d5..cc6be96 100644
--- a/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
+++ b/Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt
@@ -5,11 +5,13 @@ Required properties:
      "rockchip,rk3066a-usb-phy"
      "rockchip,rk3188-usb-phy"
      "rockchip,rk3288-usb-phy"
- - rockchip,grf : phandle to the syscon managing the "general
-   register files"
  - #address-cells: should be 1
  - #size-cells: should be 0
 
+Deprecated properties:
+ - rockchip,grf : phandle to the syscon managing the "general
+   register files" - phy should be a child of the GRF instead
+
 Sub-nodes:
 Each PHY should be represented as a sub-node.
 
@@ -28,14 +30,19 @@ Optional Properties:
 
 Example:
 
-usbphy: phy {
-       compatible = "rockchip,rk3288-usb-phy";
-       rockchip,grf = <&grf>;
-       #address-cells = <1>;
-       #size-cells = <0>;
+grf: syscon@ff770000 {
+       compatible = "rockchip,rk3288-grf", "syscon", "simple-mfd";
+
+...
+
+       usbphy: phy {
+               compatible = "rockchip,rk3288-usb-phy";
+               #address-cells = <1>;
+               #size-cells = <0>;
 
-       usbphy0: usb-phy0 {
-               #phy-cells = <0>;
-               reg = <0x320>;
+               usbphy0: usb-phy0 {
+                       #phy-cells = <0>;
+                       reg = <0x320>;
+               };
        };
 };
diff --git a/drivers/phy/phy-rockchip-usb.c b/drivers/phy/phy-rockchip-usb.c
index d60b149..e66b5bf 100644
--- a/drivers/phy/phy-rockchip-usb.c
+++ b/drivers/phy/phy-rockchip-usb.c
@@ -397,8 +397,13 @@ static int rockchip_usb_phy_probe(struct platform_device 
*pdev)
        phy_base->pdata = match->data;
 
        phy_base->dev = dev;
-       phy_base->reg_base = syscon_regmap_lookup_by_phandle(dev->of_node,
-                                                            "rockchip,grf");
+       phy_base->reg_base = ERR_PTR(-ENODEV);
+       if (dev->parent && dev->parent->of_node)
+               phy_base->reg_base = syscon_node_to_regmap(
+                                               dev->parent->of_node);
+       if (IS_ERR(phy_base->reg_base))
+               phy_base->reg_base = syscon_regmap_lookup_by_phandle(
+                                               dev->of_node, "rockchip,grf");
        if (IS_ERR(phy_base->reg_base)) {
                dev_err(&pdev->dev, "Missing rockchip,grf property\n");
                return PTR_ERR(phy_base->reg_base);
@@ -463,7 +468,11 @@ static int __init rockchip_init_usb_uart(void)
                return -ENOTSUPP;
        }
 
-       grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
+       grf = ERR_PTR(-ENODEV);
+       if (np->parent)
+               grf = syscon_node_to_regmap(np->parent);
+       if (IS_ERR(grf))
+               grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
        if (IS_ERR(grf)) {
                pr_err("%s: Missing rockchip,grf property, %lu\n",
                       __func__, PTR_ERR(grf));
-- 
1.7.9.5