diff options
| author | Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> | 2020-06-19 11:20:08 +0300 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2020-07-28 17:51:32 +0300 |
| commit | a081bd4af4ce80d845a0bab355ab5d0822db8058 (patch) | |
| tree | 32306cdac3207084afe1dc56d04d96ef18528fa1 /drivers/bus | |
| parent | 746a71d02b5d15817fcb13c956ba999a87773952 (diff) | |
| download | linux-a081bd4af4ce80d845a0bab355ab5d0822db8058.tar.xz | |
of/device: Add input id to of_dma_configure()
Devices sitting on proprietary busses have a device ID space that
is owned by the respective bus and related firmware bindings. In order
to let the generic OF layer handle the input translations to
an IOMMU id, for such busses the current of_dma_configure() interface
should be extended in order to allow the bus layer to provide the
device input id parameter - that is retrieved/assigned in bus
specific code and firmware.
Augment of_dma_configure() to add an optional input_id parameter,
leaving current functionality unchanged.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Link: https://lore.kernel.org/r/20200619082013.13661-8-lorenzo.pieralisi@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'drivers/bus')
| -rw-r--r-- | drivers/bus/fsl-mc/fsl-mc-bus.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/bus/fsl-mc/fsl-mc-bus.c b/drivers/bus/fsl-mc/fsl-mc-bus.c index 40526da5c6a6..8ead3f0238f2 100644 --- a/drivers/bus/fsl-mc/fsl-mc-bus.c +++ b/drivers/bus/fsl-mc/fsl-mc-bus.c @@ -118,11 +118,13 @@ static int fsl_mc_bus_uevent(struct device *dev, struct kobj_uevent_env *env) static int fsl_mc_dma_configure(struct device *dev) { struct device *dma_dev = dev; + struct fsl_mc_device *mc_dev = to_fsl_mc_device(dev); + u32 input_id = mc_dev->icid; while (dev_is_fsl_mc(dma_dev)) dma_dev = dma_dev->parent; - return of_dma_configure(dev, dma_dev->of_node, 0); + return of_dma_configure_id(dev, dma_dev->of_node, 0, &input_id); } static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, |