lkml.org 
[lkml]   [2018]   [Jul]   [25]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH 5/7 v6] bus/fsl-mc: support dma configure for devices on fsl-mc bus
From
Date
On 09/07/18 12:18, Nipun Gupta wrote:
> This patch adds support of dma configuration for devices on fsl-mc
> bus using 'dma_configure' callback for busses. Also, directly calling
> arch_setup_dma_ops is removed from the fsl-mc bus.

Reviewed-by: Robin Murphy <robin.murphy@arm.com>

> Signed-off-by: Nipun Gupta <nipun.gupta@nxp.com>
> Reviewed-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
> ---
> drivers/bus/fsl-mc/fsl-mc-bus.c | 15 +++++++++++----
> 1 file changed, 11 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..fa43c7d 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);
> @@ -633,10 +644,6 @@ int fsl_mc_device_add(struct fsl_mc_obj_desc *obj_desc,
> goto error_cleanup_dev;
> }
>
> - /* Objects are coherent, unless 'no shareability' flag set. */
> - if (!(obj_desc->flags & FSL_MC_OBJ_FLAG_NO_MEM_SHAREABILITY))
> - arch_setup_dma_ops(&mc_dev->dev, 0, 0, NULL, true);
> -
> /*
> * The device-specific probe callback will get invoked by device_add()
> */
>

\
 
 \ /
  Last update: 2018-07-25 14:51    [W:0.705 / U:0.116 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site