我正在浏览基于TI的evm dts文件。
http://elixir.free-electrons.com/linux/latest/source/arch/arm/boot/dts/dra7-evm.dts#L686
&atl {
assigned-clocks = <&abe_dpll_sys_clk_mux>,
<&atl_gfclk_mux>,
<&dpll_abe_ck>,
<&dpll_abe_m2x2_ck>,
<&atl_clkin2_ck>;
assigned-clock-parents = <&sys_clkin2>, <&dpll_abe_m2_ck>;
assigned-clock-rates = <0>, <0>, <180633600>, <361267200>, <5644800>;
status = "okay";
atl2 {
bws = <DRA7_ATL_WS_MCASP2_FSX>;
aws = <DRA7_ATL_WS_MCASP3_FSX>;
};
};
&mcasp3 {
#sound-dai-cells = <0>;
assigned-clocks = <&mcasp3_ahclkx_mux>;
assigned-clock-parents = <&atl_clkin2_ck>;
status = "okay";
op-mode = <0>; /* MCASP_IIS_MODE */
tdm-slots = <2>;
/* 4 serializer */
serial-dir = < /* 0: INACTIVE, 1: TX, 2: RX */
1 2 0 0
>;
tx-num-evt = <32>;
rx-num-evt = <32>;
};赋值时钟包含<&mcasp3_ahclkx_mux>的句柄,此时钟"&mcasp3_ahclkx_mux>“在"dra7xx-clocks.dtsi”中定义。
http://elixir.free-electrons.com/linux/latest/source/arch/arm/boot/dts/dra7xx-clocks.dtsi#L1814
但是却找不到这个“dra7xx-clocks.dtsi”是如何包含在"dra7-evm.dtsi“中的?
有谁能告诉我mcasp3_ahclkx_mux的定义是如何提供给dra7-evm.dts的?
发布于 2017-09-08 06:53:00
但是却找不到这个“dra7xx-clocks.dtsi”是如何包含在"dra7-evm.dtsi“中的?
dra7-evm.dts包含了dra74x.dtsi,其中包含了dra7.dtsi,而dra7xx-clocks.dtsi最终包含在dra7.dtsi中。
https://stackoverflow.com/questions/46097172
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