topic Re: imx6 spi slave not receiving data in i.MX Processors

imx6 spi slave not receiving data

hongfengwang — Tue, 24 Nov 2015 17:49:11 GMT

I am running mainline kernel 4.2.6 on hummingboard-gate (imx6solo).

Now I have one raspberryPI as SPI master and the hummingboard as slave.

I connected SS/SCLK/MISO/MOSI, the waveform looks correct, however I never see data ready bit set in imx6's spi status register, or irq triggered.

all four pins are setup in IOMUXC as in pinmux tool.

ECSPI2 registers:

ECSPI_CONREG=0x00700001

ECSPI_CONFIGREG=0x000f0000

ECSPI_INTREG=0x00000008

CCM's ecspi2 clk is enabled, irq requested is 64

spi master is configured as CS active low, mode 0.

do I need to setup anything else?

igorpadykov — Wed, 25 Nov 2015 04:49:54 GMT

Hi Hongfeng

one can try patch

or port older kernel patch

Best regards

igor

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hongfengwang — Tue, 01 Dec 2015 22:07:03 GMT

I applied the patches in

Now the hummingboard is able to receive data from SPI.

thanks for the help!

moowonlee — Tue, 22 Dec 2015 12:41:28 GMT

hi igorpadykov

Is it possible to apply this patch to linux-3.10 for adding Spi slave mode ?

I applied below path to linux-3.10 but, My imx6sx is not working as spi slave mode becaues spi rx isr doesn't get RX data.

if you have any tip, please know to me.

mingfang — Fri, 09 Feb 2018 02:37:32 GMT

hi hongfeng,

i use the same patch,but can't receive any data when imx6 as slave.would you like to tell me your register configs?