[PATCH v2 0/7] ARM: shmobile: koelsch reference: Enable DMA for QSPI
khiem.nguyen.xt at renesas.com
Mon Jun 2 21:36:33 PDT 2014
Thanks for the patches.
I think this patch series should be divided into 2 parts,
one for DMA in general and one for DMA supporting QSPI.
How do you think about it ?
On 6/2/2014 10:42 PM, Geert Uytterhoeven wrote:
> This patch series enables DMA support for QSPI on r8a7791/koelsch
> reference. It's independent from the series "ARM: shmobile: koelsch
> legacy: Enable DMA for QSPI", but it depends on the SHDMA work for r8a7790
> by Ben Dooks (cfr. "[PATCH v2 0/9] Updates Renesas OF-DMA code").
> Changes Compared to previous submission ("[PATCH/RFC 0/7] ARM: shmobile:
> r8a7791: Add preliminary DMA support"):
> - "[6/7] ARM: shmobile: r8a7791 dtsi: Enable DMA for MSIOF" was dropped,
> - 2/7 was added,
> - 7/7 was changed (see changelog in individual patch).
> This was tested on r8a7791/koelsch.
> Performance figures for reading from a QSPI FLASH driven at 24.375 MHz are:
> - Single: 1.1 Mbps PIO, 23 Mbps DMA
> - Dual : 12.7 Mbps PIO, 48 Mbps DMA
> - Quad : 13 Mbps PIO, 70 Mbps DMA
> Thanks for your comments!
> [1/7] DMA: shdma: Add r8a7791 support
> [2/7] DMA: shdma: Spelling s/controll/control/
> [3/7] ARM: shmobile: r8a7791 dtsi: add SYS-DMAC clocks
> [4/7] ARM: shmobile: r8a7791: Add SYS-DMAC channel definitions for bindings
> [5/7] ARM: shmobile: r8a7791 dtsi: Add SYS-DMAC0 and SYS-DMAC1 nodes
> [6/7] ARM: shmobile: koelsch dts: Enable sysdma0 and sysdma1
> [7/7] ARM: shmobile: r8a7791 dtsi: Enable DMA for QSPI
> Documentation/devicetree/bindings/dma/shdma.txt | 7 +-
> arch/arm/boot/dts/r8a7791-koelsch.dts | 8 ++
> arch/arm/boot/dts/r8a7791.dtsi | 79 ++++++++++++++++-
> drivers/dma/sh/shdmac.c | 1 +
> include/dt-bindings/dma/r8a7791-dma.h | 111 ++++++++++++++++++++++++
> 5 files changed, 201 insertions(+), 5 deletions(-)
> create mode 100644 include/dt-bindings/dma/r8a7791-dma.h
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-m68k.org
> In personal conversations with technical people, I call myself a hacker. But
> when I'm talking to journalists I just say "programmer" or something like that.
> -- Linus Torvalds
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