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phy: rockchip-emmc: should be a child device of the GRF 

The emmc-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.

The driver entered the kernel in the current merge-window, so we can still
adapt the binding without needing a fallback, as the binding hasn't been
released with a full kernel yet.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Shawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>
This commit is contained in:
Heiko Stuebner 2016-03-24 22:29:02 +01:00 committed by Kishon Vijay Abraham I
parent 0311c76e47
commit 332184adff
2 changed files with 15 additions and 8 deletions
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18
Documentation/devicetree/bindings/phy/rockchip-emmc-phy.txt
View File

@ -3,17 +3,21 @@ Rockchip EMMC PHY
Required properties:
- compatible: rockchip,rk3399-emmc-phy
- rockchip,grf : phandle to the syscon managing the "general
register files"
- #phy-cells: must be 0
- reg: PHY configure reg address offset in "general
register files"
Example:
emmcphy: phy {
compatible = "rockchip,rk3399-emmc-phy";
rockchip,grf = <&grf>;
reg = <0xf780>;
#phy-cells = <0>;
grf: syscon@ff770000 {
compatible = "rockchip,rk3399-grf", "syscon", "simple-mfd";
...
emmcphy: phy@f780 {
compatible = "rockchip,rk3399-emmc-phy";
reg = <0xf780>;
#phy-cells = <0>;
};
};

5
drivers/phy/phy-rockchip-emmc.c
View File

@ -176,7 +176,10 @@ static int rockchip_emmc_phy_probe(struct platform_device *pdev)
struct regmap *grf;
unsigned int reg_offset;
grf = syscon_regmap_lookup_by_phandle(dev->of_node, "rockchip,grf");
if (!dev->parent || !dev->parent->of_node)
return -ENODEV;
grf = syscon_node_to_regmap(dev->parent->of_node);
if (IS_ERR(grf)) {
dev_err(dev, "Missing rockchip,grf property\n");
return PTR_ERR(grf);