RV1103/1106的SPI最大时钟速度只有50MHz，如何修改才能提高？

• iotahydrae

  Posts: 2

  Joined: 2024-05-27 0:26

  2024-05-27 1:03

  如题，目前测试只有sfc速度高一点，能达到71MHz，但是只用于nand。

  Code: Select all

  	spi0: spi@ff500000 {
  		compatible = "rockchip,rv1106-spi", "rockchip,rk3066-spi";
  		reg = <0xff500000 0x1000>;
  		interrupts = <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>;
  		#address-cells = <1>;
  		#size-cells = <0>;
  		clocks = <&cru CLK_SPI0>, <&cru PCLK_SPI0>, <&cru SCLK_IN_SPI0>;
  		clock-names = "spiclk", "apb_pclk", "sclk_in";
  		dmas = <&dmac 1>, <&dmac 0>;
  		dma-names = "tx", "rx";
  		pinctrl-names = "default";
  		pinctrl-0 = <&spi0m0_cs0 &spi0m0_cs1 &spi0m0_pins>;
  		status = "disabled";
  	};
  

  Code: Select all

  	sfc: spi@ffac0000 {
  		compatible = "rockchip,sfc";
  		reg = <0xffac0000 0x4000>;
  		interrupts = <GIC_SPI 53 IRQ_TYPE_LEVEL_HIGH>;
  		clocks = <&cru SCLK_SFC>, <&cru HCLK_SFC>;
  		clock-names = "clk_sfc", "hclk_sfc";
  		assigned-clocks = <&cru SCLK_SFC>;
  		assigned-clock-rates = <75000000>;
  		#address-cells = <1>;
  		#size-cells = <0>;
  		status = "disabled";
  	};
  

  

  

  • Quote

/* sclk_out: spi master internal logic in rk3x can support 50Mhz */
#define MAX_SCLK_OUT				50000000U