Based on commit 980066e6d964 ("dt-bindings: phy: dp83867: Add documentation for disabling clock output") of mainline linux kernel.
The clock output is generally only used for testing and development and not used to daisy-chain PHYs. It's just a source of RF noise afterward.
Add a mux value for "off". I've added it as another enumeration to the output property. In the actual PHY, the mux and the output enable are independently controllable. However, it doesn't seem useful to be able to describe the mux setting when the output is disabled.
Document that PHY's default setting will be left as is if the property is omitted.
Signed-off-by: Grygorii Strashko grygorii.strashko@ti.com --- doc/device-tree-bindings/net/ti,dp83867.txt | 6 ++++-- include/dt-bindings/net/ti-dp83867.h | 3 ++- 2 files changed, 6 insertions(+), 3 deletions(-)
diff --git a/doc/device-tree-bindings/net/ti,dp83867.txt b/doc/device-tree-bindings/net/ti,dp83867.txt index 034146f5f8..268220964a 100644 --- a/doc/device-tree-bindings/net/ti,dp83867.txt +++ b/doc/device-tree-bindings/net/ti,dp83867.txt @@ -12,8 +12,10 @@ Required properties: compensate for the board being designed with the lanes swapped. - enet-phy-no-lane-swap - Indicates that PHY will disable swap of the TX/RX lanes. - - ti,clk-output-sel - Clock output select - see dt-bindings/net/ti-dp83867.h - for applicable values + - ti,clk-output-sel - Muxing option for CLK_OUT pin. See dt-bindings/net/ti-dp83867.h + for applicable values. The CLK_OUT pin can also + be disabled by this property. When omitted, the + PHY's default will be left as is.
Default child nodes are standard Ethernet PHY device nodes as described in doc/devicetree/bindings/net/ethernet.txt diff --git a/include/dt-bindings/net/ti-dp83867.h b/include/dt-bindings/net/ti-dp83867.h index 85d08f6974..cde5aa7e27 100644 --- a/include/dt-bindings/net/ti-dp83867.h +++ b/include/dt-bindings/net/ti-dp83867.h @@ -45,5 +45,6 @@ #define DP83867_CLK_O_SEL_CHN_C_TCLK 0xA #define DP83867_CLK_O_SEL_CHN_D_TCLK 0xB #define DP83867_CLK_O_SEL_REF_CLK 0xC - +/* Special flag to indicate clock should be off */ +#define DP83867_CLK_O_SEL_OFF 0xFFFFFFFF #endif