linux-kernel - [PATCH v5 0/6] add edma2 for i.mx7ulp

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Date:   Tue, 25 Jun 2019 17:43:18 +0800
From:   yibin.gong@....com
To:     robh@...nel.org, shawnguo@...nel.org, s.hauer@...gutronix.de,
        festevam@...il.com, mark.rutland@....com, vkoul@...nel.org,
        dan.j.williams@...el.com, angelo@...am.it
Cc:     linux-imx@....com, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org, kernel@...gutronix.de
Subject: [PATCH v5 0/6] add edma2 for i.mx7ulp

From: Robin Gong <yibin.gong@....com>

This patch set add new version of edma for i.mx7ulp, the main changes
are as belows:
 1. only one dmamux.
 2. another clock dma_clk except dmamux clk.
 3. 16 independent interrupts instead of only one interrupt for
    all channels
For the first change, need modify fsl-edma-common.c and mcf-edma,
so create the first two patches to prepare without any function impact.

For the third change, need request single irq for every channel with
the legacy handler. But actually 2 dma channels share one interrupt(16
channel interrupts, but 32 channels.),ch0/ch16,ch1/ch17... For now, just
simply request irq without IRQF_SHARED flag, since 16 channels are enough
on i.mx7ulp whose M4 domain own some peripherals.

change from v1:
  1. check .data of 'of_device_id' in probe instead of compatible name.

change from v2:
  1. move the difference between edma and edma2 into driver data so that
     no need version checking in fsl-edma.c.

change from v3:
  1. remove duplicated 'version' and 'dmamux_nr' in 'struct fsl_edma_engine'
     since they are included in drvdata already.
  2. downgrade print log level.
  3. address some minor indent issues raised by Vinod.

change from v4:
  1. correct typo.

Robin Gong (6):
  dmaengine: fsl-edma: add drvdata for fsl-edma
  dmaengine: fsl-edma-common: move dmamux register to another single
    function
  dmaengine: fsl-edma-common: version check for v2 instead
  dt-bindings: dma: fsl-edma: add new i.mx7ulp-edma
  dmaengine: fsl-edma: add i.mx7ulp edma2 version support
  ARM: dts: imx7ulp: add edma device node

 Documentation/devicetree/bindings/dma/fsl-edma.txt |  44 ++++++++-
 arch/arm/boot/dts/imx7ulp.dtsi                     |  28 ++++++
 drivers/dma/fsl-edma-common.c                      |  83 ++++++++++------
 drivers/dma/fsl-edma-common.h                      |  14 ++-
 drivers/dma/fsl-edma.c                             | 109 ++++++++++++++++++---
 drivers/dma/mcf-edma.c                             |  11 ++-
 6 files changed, 239 insertions(+), 50 deletions(-)

-- 
2.7.4