The current cpsw usage for cpsw-phy-sel is undocumented but is used for
all the boards using cpsw. And cpsw-phy-sel is not really a child of
the cpsw device, it lives in the system control module instead.
Let's document the existing usage, and improve it a bit where we prefer
to use a phandle instead of a child device for it. That way we can
properly describe the hardware in dts files for things like genpd.
Cc: devicet...@vger.kernel.org
Cc: Andrew Lunn <and...@lunn.ch>
Cc: Grygorii Strashko <grygorii.stras...@ti.com>
Cc: Ivan Khoronzhuk <ivan.khoronz...@linaro.org>
Cc: Mark Rutland <mark.rutl...@arm.com>
Cc: Murali Karicheri <m-kariche...@ti.com>
Cc: Rob Herring <robh...@kernel.org>
Signed-off-by: Tony Lindgren <t...@atomide.com>
---
Documentation/devicetree/bindings/net/cpsw.txt | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/Documentation/devicetree/bindings/net/cpsw.txt
b/Documentation/devicetree/bindings/net/cpsw.txt
--- a/Documentation/devicetree/bindings/net/cpsw.txt
+++ b/Documentation/devicetree/bindings/net/cpsw.txt
@@ -19,6 +19,10 @@ Required properties:
- slaves : Specifies number for slaves
- active_slave : Specifies the slave to use for time stamping,
ethtool and SIOCGMIIPHY
+- cpsw-phy-sel : Specifies the phandle to the CPSW phy mode selection
+ device. See also cpsw-phy-sel.txt for it's binding.
+ Note that in legacy cases cpsw-phy-sel may be
+ a child device instead of a phandle.
Optional properties:
- ti,hwmods : Must be "cpgmac0"
@@ -75,6 +79,7 @@ Examples:
cpts_clock_mult = <0x80000000>;
cpts_clock_shift = <29>;
syscon = <&cm>;
+ cpsw-phy-sel = <&phy_sel>;
cpsw_emac0: slave@0 {
phy_id = <&davinci_mdio>, <0>;
phy-mode = "rgmii-txid";
@@ -103,6 +108,7 @@ Examples:
cpts_clock_mult = <0x80000000>;
cpts_clock_shift = <29>;
syscon = <&cm>;
+ cpsw-phy-sel = <&phy_sel>;
cpsw_emac0: slave@0 {
phy_id = <&davinci_mdio>, <0>;
phy-mode = "rgmii-txid";
--
2.18.0
