From mboxrd@z Thu Jan 1 00:00:00 1970 From: laurentiu.tudor@nxp.com (Laurentiu Tudor) Date: Mon, 14 May 2018 13:39:50 +0000 Subject: [PATCH 5/6 v3] bus: fsl-mc: supoprt dma configure for devices on fsl-mc bus In-Reply-To: <1524824826-29473-6-git-send-email-nipun.gupta@nxp.com> References: <1524824826-29473-1-git-send-email-nipun.gupta@nxp.com> <1524824826-29473-6-git-send-email-nipun.gupta@nxp.com> Message-ID: <5AF9916E.8000504@nxp.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi Nipun, On 04/27/2018 01:27 PM, Nipun Gupta wrote: > Signed-off-by: Nipun Gupta > --- > drivers/bus/fsl-mc/fsl-mc-bus.c | 16 ++++++++++++---- > 1 file changed, 12 insertions(+), 4 deletions(-) > > diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c > index 5d8266c..624828b 100644 > --- a/drivers/bus/fsl-mc/fsl-mc-bus.c > +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c > @@ -127,6 +127,16 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) > return 0; > } > > +static int fsl_mc_dma_configure(struct device *dev) > +{ > + struct device *dma_dev = dev; > + > + while (dev_is_fsl_mc(dma_dev)) > + dma_dev = dma_dev->parent; > + > + return of_dma_configure(dev, dma_dev->of_node, 0); > +} > + > static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, > char *buf) > { > @@ -148,6 +158,7 @@ struct bus_type fsl_mc_bus_type = { > .name = "fsl-mc", > .match = fsl_mc_bus_match, > .uevent = fsl_mc_bus_uevent, > + .dma_configure = fsl_mc_dma_configure, > .dev_groups = fsl_mc_dev_groups, > }; > EXPORT_SYMBOL_GPL(fsl_mc_bus_type); > @@ -616,6 +627,7 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc, > mc_dev->icid = parent_mc_dev->icid; > mc_dev->dma_mask = FSL_MC_DEFAULT_DMA_MASK; > mc_dev->dev.dma_mask = &mc_dev->dma_mask; > + mc_dev->dev.coherent_dma_mask = mc_dev->dma_mask; This change seems a bit unrelated to the patch subject. I wonder if it makes sense to split it it in a distinct patch. --- Best Regards, Laurentiu