Hi Ramiro, Thank you for the patch. On Wednesday 14 Dec 2016 17:18:24 Ramiro Oliveira wrote: > Add a DT property to control an optional external reset line > > Signed-off-by: Ramiro Oliveira <roliveir@xxxxxxxxxxxx> > --- > drivers/dma/xilinx/xilinx_dma.c | 23 +++++++++++++++++++++++ > 1 file changed, 23 insertions(+) > > diff --git a/drivers/dma/xilinx/xilinx_dma.c > b/drivers/dma/xilinx/xilinx_dma.c index 5c9f11b..b845224 100644 > --- a/drivers/dma/xilinx/xilinx_dma.c > +++ b/drivers/dma/xilinx/xilinx_dma.c > @@ -46,6 +46,7 @@ > #include <linux/slab.h> > #include <linux/clk.h> > #include <linux/io-64-nonatomic-lo-hi.h> > +#include <linux/reset.h> I had neatly sorted the header alphabetically until someone added clk.h and io-64-nonatomic-lo-hi.h :-( Could you please move reset.h just before slab.h ? > > #include "../dmaengine.h" > > @@ -409,6 +410,7 @@ struct xilinx_dma_device { > struct clk *rxs_clk; > u32 nr_channels; > u32 chan_id; > + struct reset_control *rst; > }; > > /* Macros */ > @@ -2543,6 +2545,27 @@ static int xilinx_dma_probe(struct platform_device > *pdev) if (IS_ERR(xdev->regs)) > return PTR_ERR(xdev->regs); > > + xdev->rst = devm_reset_control_get_optional(&pdev->dev, "reset"); devm_reset_control_get_optional() is deprecated as explained in linux/reset.h, you should use devm_reset_control_get_optional_exclusive() or devm_reset_control_get_optional_shared() instead, as applicable. This being said, I'm wondering why the optional versions of those functions exist, as they do exactly the same as the non-optional versions. The API feels wrong, it should have been modelled like the GPIO API. Feel free to fix it if you want :-) But that's out of scope for this patch. > + if (IS_ERR(xdev->rst)) { > + err = PTR_ERR(xdev->rst); > + switch (err) { > + case -ENOENT: If you drop the name as proposed in the review of patch 1/2 you don't have to check for -ENOENT. > + case -ENOTSUPP: > + xdev->rst = NULL; > + break; Wrong indentation. You need to handle -EPROBE_DEFER and defer probing of the xilinx_dma device. > + default: > + dev_err(xdev->dev, "error getting reset %d\n", err); > + return err; Wrong indentation. > + } > + } else { > + err = reset_control_deassert(xdev->rst); > + if (err) { > + dev_err(xdev->dev, "failed to deassert reset: %d\n", > + err); Wrong indentation. > + return err; > + } > + } > + > /* Retrieve the DMA engine properties from the device tree */ > xdev->has_sg = of_property_read_bool(node, "xlnx,include-sg"); > if (xdev->dma_config->dmatype == XDMA_TYPE_AXIDMA) -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html