i.MX ProcessorsのトピックRe: Under the Linux3.0.35 kernel version, how to increase the access frequencies of IMX6Q SPI's CS ? The attachment is the picture of SPI access frequencies when clock cycles is 20 MHZ. Red one is CS singal,the yellow one is SPI clock signal.

Under the Linux3.0.35 kernel version, how to increase the access frequencies of IMX6Q SPI's CS ? The attachment is the picture of SPI access frequencies when clock cycles is 20 MHZ. Red one is CS singal,the yellow one is SPI clock signal.

ferdi — Tue, 17 Nov 2015 03:31:10 GMT

Hi :

Under the Linux3.0.35 kernel version, how to increase the access frequencies of IMX6Q SPI's CS ? The attachment is the picture of SPI access frequencies when clock cycles is 20 MHZ. Red one is CS singal,the yellow one is SPI clock signal.

Ferdi

Best Regards!

Re: Under the Linux3.0.35 kernel version, how to increase the access frequencies of IMX6Q SPI's CS ? The attachment is the picture of SPI access frequencies when clock cycles is 20 MHZ. Red one is CS singal,the yellow one is SPI clock signal.

igorpadykov — Wed, 18 Nov 2015 01:34:50 GMT

Hi ferdi

one can try to enable dma:

https://community.freescale.com/thread/328465

https://lkml.org/lkml/2014/9/15/1075

Best regards

igor

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Re: Under the Linux3.0.35 kernel version, how to increase the access frequencies of IMX6Q SPI's CS ? The attachment is the picture of SPI access frequencies when clock cycles is 20 MHZ. Red one is CS singal,the yellow one is SPI clock signal.

ferdi — Wed, 09 Dec 2015 09:12:54 GMT

Dear igorpadykov:

The connection patch is based on the IMX51 platform, which is not compatible with the IMX6Q platform, Do not know if there is a Linux3.0.35 based IMX6Q patch platform? Thank you!

Best regards!

Ferdi