Increase SPI buffer size

• 

  kornpow

  Posts: 12

  Joined: 2024-08-12 19:16

  2025-06-12 22:40

  I am trying to increase the buffer size of the SPI driver, to be greater than `4096`.
  
  ```
  [root@luckfox ]# cat /sys/module/spidev/parameters/bufsiz
  4096
  ```
  
  I've recompiled with the below change. But it didn't do what I wanted.
  ```
  --- a/sysdrv/source/kernel/arch/arm/boot/dts/rv1103g-luckfox-pico.dts
  +++ b/sysdrv/source/kernel/arch/arm/boot/dts/rv1103g-luckfox-pico.dts
  @@ -119,9 +119,13 @@ &usbdrd_dwc3 {
  /**********SPI**********/
  /* SPI0_M0 */
  &spi0 {
  - status = "disabled";
  + status = "okay";
  spidev@0 {
  spi-max-frequency = <50000000>;
  + /* Large buffer configuration */
  + bufsiz = <250000>; /* 128KB */
  + rx-buffer-size = <250000>;
  + tx-buffer-size = <250000>;
  };
  ```
  
  Can you please let me know how to update this value?

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