Messages in this thread Patch in this message | | | From | Yixun Lan <> | Subject | [PATCH 1/3] clk: meson: add DT documentation for emmc clock controller | Date | Tue, 3 Jul 2018 14:57:14 +0000 |
| |
Document the EMMC sub clock controller driver, the potential consumer of this driver is EMMC or NAND.
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com> --- .../bindings/clock/amlogic,emmc-clkc.txt | 45 +++++++++++++++++++ 1 file changed, 45 insertions(+) create mode 100644 Documentation/devicetree/bindings/clock/amlogic,emmc-clkc.txt
diff --git a/Documentation/devicetree/bindings/clock/amlogic,emmc-clkc.txt b/Documentation/devicetree/bindings/clock/amlogic,emmc-clkc.txt new file mode 100644 index 000000000000..5534bd446363 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/amlogic,emmc-clkc.txt @@ -0,0 +1,45 @@ +* Amlogic EMMC Sub Clock Controller Driver + +The Amlogic EMMC clock controller generates and supplies clock to support +EMMC and NAND controller + +Required Properties: + +- compatible: should be: + "amlogic,emmc-clkc" + +- #clock-cells: should be 1. + +Two clocks are provided as the parent of this EMMC clock controller driver from +upper layer clock controller - eg "amlogic,axg-clkc" in AXG platfrom. +The main consumer of this driver is EMMC or NAND, to specify which the clock +they may consume, the preprocessor macros in the dt-bindings/clock/emmc-clkc.h +header and can be used in device tree sources. + +Parent node should have the following properties : +- compatible: "syscon", "simple-mfd, and "amlogic,emmc-clkc" +- reg: base address and size of the EMMC control register space. + +Example: Clock controller node: + +sd_emmc_c_clkc: clock-controller@7000 { + compatible = "amlogic,emmc-clkc", "syscon", "simple-mfd"; + reg = <0x0 0x7000 0x0 0x4>; + #clock-cells = <1>; + + clock-names = "clkin0", "clkin1"; + clocks = <&clkc CLKID_SD_EMMC_C_CLK0>, + <&clkc CLKID_FCLK_DIV2>; +}; + +Example: NAND controller node that consumes the clock generated by the clock + controller: + + nand: nfc@7800 { + compatible = "amlogic,meson-axg-nfc"; + reg = <0x0 0x7800 0x0 0x100>; + interrupts = <GIC_SPI 34 IRQ_TYPE_EDGE_RISING>; + clocks = <&clkc CLKID_SD_EMMC_C>, + <&sd_emmc_c_clkc CLKID_EMMC_C_DIV>; + clock-names = "core", "device"; + }; -- 2.18.0
| |