4.4-stable review patch. If anyone has any objections, please let me know.
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From: Sean Nyekjaer sean.nyekjaer@prevas.dk
commit df07101e1c4a29e820df02f9989a066988b160e6 upstream.
According to the reference manual the shp_2_mcu / mcu_2_shp scripts must be used for devices connected through the SPBA.
This fixes an issue we saw with DMA transfers. Sometimes the SPI controller RX FIFO was not empty after a DMA transfer and the driver got stuck in the next PIO transfer when it read one word more than expected.
commit dd4b487b32a35 ("ARM: dts: imx6: Use correct SDMA script for SPI cores") is fixing the same issue but only for SPI1 - 4.
Fixes: 677940258dd8e ("ARM: dts: imx6q: enable dma for ecspi5") Signed-off-by: Sean Nyekjaer sean.nyekjaer@prevas.dk Reviewed-by: Fabio Estevam fabio.estevam@nxp.com Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- arch/arm/boot/dts/imx6q.dtsi | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm/boot/dts/imx6q.dtsi +++ b/arch/arm/boot/dts/imx6q.dtsi @@ -95,7 +95,7 @@ clocks = <&clks IMX6Q_CLK_ECSPI5>, <&clks IMX6Q_CLK_ECSPI5>; clock-names = "ipg", "per"; - dmas = <&sdma 11 7 1>, <&sdma 12 7 2>; + dmas = <&sdma 11 8 1>, <&sdma 12 8 2>; dma-names = "rx", "tx"; status = "disabled"; };