recipes-kernel: most: add patch set for DT support

This patch adds a set of patches to enable DT usage of the DIM2 module.
It is needed to use the MediaLB (DIM) interface with the Kingfisher.

Change-Id: Idd71bea6f2c17cb579f0b44884037e7046380034
Signed-off-by: Christian Gromm <christian.gromm@microchip.com>

1 files changed, 47 insertions, 0 deletions

diff --git a/recipes-kernel/most/files/0009-dim2-use-device-for-coherent-memory-allocation.patch b/recipes-kernel/most/files/0009-dim2-use-device-for-coherent-memory-allocation.patch
new file mode 100644
index 000000000..08cd6f99d
--- /dev/null
+++ b/recipes-kernel/most/files/0009-dim2-use-device-for-coherent-memory-allocation.patch
@@ -0,0 +1,47 @@
+From 756f2f1f90524c2620ed7951e436d13bdb929a6b Mon Sep 17 00:00:00 2001
+From: Andrey Shvetsov <andrey.shvetsov@k2l.de>
+Date: Mon, 12 Feb 2018 12:25:37 +0100
+Subject: [PATCH] staging: most: dim2: use device for coherent memory allocation
+
+On several modern architectures the allocation of coherent memory needs
+a device that has the dma_ops properly set.  This patch enables use of
+the DIM2 platform device for the allocation process.
+
+Signed-off-by: Andrey Shvetsov <andrey.shvetsov@k2l.de>
+---
+ hdm-dim2/dim2_hdm.c |  9 +++++++--
+ 1 file changed, 7 insertions(+), 2 deletions(-)
+
+diff --git a/hdm-dim2/dim2_hdm.c b/hdm-dim2/dim2_hdm.c
+index 05e1896..1847091 100644
+--- a/hdm-dim2/dim2_hdm.c
++++ b/hdm-dim2/dim2_hdm.c
+@@ -688,12 +688,16 @@ static int poison_channel(struct most_interface *most_iface, int ch_idx)
+
+ static void *dma_alloc(struct mbo *mbo, u32 size)
+ {
+-	return dma_alloc_coherent(NULL, size, &mbo->bus_address, GFP_KERNEL);
++	struct device *dev = mbo->ifp->dev;
++
++	return dma_alloc_coherent(dev, size, &mbo->bus_address, GFP_KERNEL);
+ }
+
+ static void dma_free(struct mbo *mbo, u32 size)
+ {
+-	dma_free_coherent(NULL, size, mbo->virt_address, mbo->bus_address);
++	struct device *dev = mbo->ifp->dev;
++
++	dma_free_coherent(dev, size, mbo->virt_address, mbo->bus_address);
+ }
+
+ static const struct of_device_id dim2_of_match[];
+@@ -875,6 +879,7 @@ static int dim2_probe(struct platform_device *pdev)
+	dev->most_iface.poison_channel = poison_channel;
+	dev->most_iface.request_netinfo = request_netinfo;
+	dev->most_iface.extra_attrs = DBR_ATTRS;
++	dev->most_iface.dev = &pdev->dev;
+
+	kobj = most_register_interface(&dev->most_iface);
+	if (IS_ERR(kobj)) {
+--
+libgit2 0.26.0