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Diffstat (limited to 'Documentation/devicetree/bindings/clock/ti/mux.txt')
-rw-r--r-- | Documentation/devicetree/bindings/clock/ti/mux.txt | 78 |
1 files changed, 0 insertions, 78 deletions
diff --git a/Documentation/devicetree/bindings/clock/ti/mux.txt b/Documentation/devicetree/bindings/clock/ti/mux.txt deleted file mode 100644 index cd56d3c1c09f..000000000000 --- a/Documentation/devicetree/bindings/clock/ti/mux.txt +++ /dev/null @@ -1,78 +0,0 @@ -Binding for TI mux clock. - -This binding uses the common clock binding[1]. It assumes a -register-mapped multiplexer with multiple input clock signals or -parents, one of which can be selected as output. This clock does not -gate or adjust the parent rate via a divider or multiplier. - -By default the "clocks" property lists the parents in the same order -as they are programmed into the register. E.g: - - clocks = <&foo_clock>, <&bar_clock>, <&baz_clock>; - -results in programming the register as follows: - -register value selected parent clock -0 foo_clock -1 bar_clock -2 baz_clock - -Some clock controller IPs do not allow a value of zero to be programmed -into the register, instead indexing begins at 1. The optional property -"index-starts-at-one" modified the scheme as follows: - -register value selected clock parent -1 foo_clock -2 bar_clock -3 baz_clock - -The binding must provide the register to control the mux. Optionally -the number of bits to shift the control field in the register can be -supplied. If the shift value is missing it is the same as supplying -a zero shift. - -[1] Documentation/devicetree/bindings/clock/clock-bindings.txt - -Required properties: -- compatible : shall be "ti,mux-clock" or "ti,composite-mux-clock". -- #clock-cells : from common clock binding; shall be set to 0. -- clocks : link phandles of parent clocks -- reg : register offset for register controlling adjustable mux - -Optional properties: -- clock-output-names : from common clock binding. -- ti,bit-shift : number of bits to shift the bit-mask, defaults to - 0 if not present -- ti,index-starts-at-one : valid input select programming starts at 1, not - zero -- ti,set-rate-parent : clk_set_rate is propagated to parent clock, - not supported by the composite-mux-clock subtype -- ti,latch-bit : latch the mux value to HW, only needed if the register - access requires this. As an example, dra7x DPLL_GMAC H14 muxing - implements such behavior. - -Examples: - -sys_clkin_ck: sys_clkin_ck@4a306110 { - #clock-cells = <0>; - compatible = "ti,mux-clock"; - clocks = <&virt_12000000_ck>, <&virt_13000000_ck>, <&virt_16800000_ck>, <&virt_19200000_ck>, <&virt_26000000_ck>, <&virt_27000000_ck>, <&virt_38400000_ck>; - reg = <0x0110>; - ti,index-starts-at-one; -}; - -abe_dpll_bypass_clk_mux_ck: abe_dpll_bypass_clk_mux_ck@4a306108 { - #clock-cells = <0>; - compatible = "ti,mux-clock"; - clocks = <&sys_clkin_ck>, <&sys_32k_ck>; - ti,bit-shift = <24>; - reg = <0x0108>; -}; - -mcbsp5_mux_fck: mcbsp5_mux_fck { - #clock-cells = <0>; - compatible = "ti,composite-mux-clock"; - clocks = <&core_96m_fck>, <&mcbsp_clks>; - ti,bit-shift = <4>; - reg = <0x02d8>; -}; |