Hello, I'm trying to make imx28 work at 20Mhz in slave mode.
I modified the mxs_spi driver, so it works in slave mode. And, it seems to work well at 4-10 Mhz, But when I'm trying to send the data at 12.5Mhz, SPI receives nothing, It doesn't even generate interrupts.
I'm having a hard time figuring out what is the max SPI clock imx28's spi peripheral could handle in a slave mode. According to the datasheet, it could handle up to 50us min clock phase => 20Mhz total.