Re: [PATCH] OMAP: McSPI: Fix RX DMA transfer path

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----- Original Message ----- From: "Aaro Koskinen" <aaro.koskinen@xxxxxxxxx>
Subject: [PATCH] OMAP: McSPI: Fix RX DMA transfer path


From: Eero Nurkkala <ext-eero.nurkkala@xxxxxxxxx>

When data is read through DMA, the last element must be read separately
through the RX register. It cannot be transferred by the DMA. For further
details see e.g. OMAP3430 TRM.

Could you provide the section number and the version of TRM you are
referring to.


Without the fix the driver causes extra clocks to be clocked to the
bus after DMA RX operations. This can cause interesting behaviour with
some devices.

Could you provide more details on the errors seen i.e is the transfer aborted

Thanks
Hemanth

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