I am using the uboot int the sdk6.0. when I using "sf read ${kloadaddr} ${spi_src_addr} ${spi_img_siz}" to read the image from the spi flash, it use 16 secs for 9M bytes's image. The default SPI clock is 24 Mhz, when I changed it to 48Mhz, it also uses 15secs. Why? I watched the code in the uboot, it use "CMD_READ_ARRAY_FAST" command. The command value is 0x0b. I need your help, thank you very much. How can I improve the speed?
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