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dmaengine fixes for v4.16-rc5

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Two small fixes are for this cycle:
 - fix max_chunk_size for rcar-dmac for R-Car Gen3
 - fix clock resource of mv_xor_v2
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Merge tag 'dmaengine-fix-4.16-rc5' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine fixes from Vinod Koul:
 "Two small fixes are for this cycle:

   - fix max_chunk_size for rcar-dmac for R-Car Gen3

   - fix clock resource of mv_xor_v2"

* tag 'dmaengine-fix-4.16-rc5' of git://git.infradead.org/users/vkoul/slave-dma:
  dmaengine: mv_xor_v2: Fix clock resource by adding a register clock
  dmaengine: rcar-dmac: fix max_chunk_size for R-Car Gen3
This commit is contained in:
Linus Torvalds 2018-03-11 13:07:14 -07:00
commit abeb75218a
3 changed files with 26 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/devicetree/bindings/dma/mv-xor-v2.txt
View File

@ -11,7 +11,11 @@ Required properties:
interrupts.
Optional properties:
- clocks: Optional reference to the clock used by the XOR engine.
- clocks: Optional reference to the clocks used by the XOR engine.
- clock-names: mandatory if there is a second clock, in this case the
name must be "core" for the first clock and "reg" for the second
one
Example:

25
drivers/dma/mv_xor_v2.c
View File

@ -163,6 +163,7 @@ struct mv_xor_v2_device {
void __iomem *dma_base;
void __iomem *glob_base;
struct clk *clk;
struct clk *reg_clk;
struct tasklet_struct irq_tasklet;
struct list_head free_sw_desc;
struct dma_device dmadev;
@ -749,13 +750,26 @@ static int mv_xor_v2_probe(struct platform_device *pdev)
if (ret)
return ret;
xor_dev->reg_clk = devm_clk_get(&pdev->dev, "reg");
if (PTR_ERR(xor_dev->reg_clk) != -ENOENT) {
if (!IS_ERR(xor_dev->reg_clk)) {
ret = clk_prepare_enable(xor_dev->reg_clk);
if (ret)
return ret;
} else {
return PTR_ERR(xor_dev->reg_clk);
}
}
xor_dev->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(xor_dev->clk) && PTR_ERR(xor_dev->clk) == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (IS_ERR(xor_dev->clk) && PTR_ERR(xor_dev->clk) == -EPROBE_DEFER) {
ret = EPROBE_DEFER;
goto disable_reg_clk;
}
if (!IS_ERR(xor_dev->clk)) {
ret = clk_prepare_enable(xor_dev->clk);
if (ret)
return ret;
goto disable_reg_clk;
}
ret = platform_msi_domain_alloc_irqs(&pdev->dev, 1,
@ -866,8 +880,9 @@ free_hw_desq:
free_msi_irqs:
platform_msi_domain_free_irqs(&pdev->dev);
disable_clk:
if (!IS_ERR(xor_dev->clk))
clk_disable_unprepare(xor_dev->clk);
clk_disable_unprepare(xor_dev->clk);
disable_reg_clk:
clk_disable_unprepare(xor_dev->reg_clk);
return ret;
}

2
drivers/dma/sh/rcar-dmac.c
View File

@ -917,7 +917,7 @@ rcar_dmac_chan_prep_sg(struct rcar_dmac_chan *chan, struct scatterlist *sgl,
rcar_dmac_chan_configure_desc(chan, desc);
max_chunk_size = (RCAR_DMATCR_MASK + 1) << desc->xfer_shift;
max_chunk_size = RCAR_DMATCR_MASK << desc->xfer_shift;
/*
* Allocate and fill the transfer chunk descriptors. We own the only