Merge tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma

Pull dmaengine updates from Vinod Koul:

 - Move Dmaengine DT bindings to YAML and convert Allwinner to schema.

 - FSL dma device_synchronize implementation

 - DW split acpi and of helpers and updates to driver and support for
   Elkhart Lake

 - Move filter fn as private for omap-dma and edma drivers and
   improvements to these drivers

 - Mark expected switch fall-through in couple of drivers

 - Renames of shdma and nbpfaxi binding document

 - Minor updates to bunch of drivers

* tag 'dmaengine-5.4-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (55 commits)
  dmaengine: ti: edma: Use bitmap_set() instead of open coded edma_set_bits()
  dmaengine: ti: edma: Only reset region0 access registers
  dmaengine: ti: edma: Do not reset reserved paRAM slots
  dmaengine: iop-adma.c: fix printk format warning
  dmaengine: stm32-dma: Use struct_size() helper
  dt-bindings: dmaengine: dma-common: Fix the dma-channel-mask property
  dmanegine: ioat/dca: Use struct_size() helper
  dmaengine: iop-adma: remove set but not used variable 'slots_per_op'
  dmaengine: dmatest: Add support for completion polling
  dmaengine: ti: omap-dma: Remove variable override in omap_dma_tx_status()
  dmaengine: ti: omap-dma: Remove 'Assignment in if condition'
  dmaengine: ti: edma: Remove 'Assignment in if condition'
  dmaengine: dw: platform: Split OF helpers to separate module
  dmaengine: dw: platform: Split ACPI helpers to separate module
  dmaengine: dw: platform: Move handle check to dw_dma_acpi_controller_register()
  dmaengine: dw: platform: Switch to acpi_dma_controller_register()
  dmaengine: dw: platform: Use devm_platform_ioremap_resource()
  dmaengine: dw: platform: Enable iDMA 32-bit on Intel Elkhart Lake
  dmaengine: dw: platform: Use struct dw_dma_chip_pdata
  dmaengine: dw: Export struct dw_dma_chip_pdata for wider use
  ...

1 files changed, 53 insertions, 0 deletions

diff --git a/drivers/dma/dw/acpi.c b/drivers/dma/dw/acpi.c
new file mode 100644
index 000000000000..f6e8d55b4f6e
--- /dev/null
+++ b/drivers/dma/dw/acpi.c
@@ -0,0 +1,53 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2013,2019 Intel Corporation
+
+#include <linux/acpi.h>
+#include <linux/acpi_dma.h>
+
+#include "internal.h"
+
+static bool dw_dma_acpi_filter(struct dma_chan *chan, void *param)
+{
+	struct acpi_dma_spec *dma_spec = param;
+	struct dw_dma_slave slave = {
+		.dma_dev = dma_spec->dev,
+		.src_id = dma_spec->slave_id,
+		.dst_id = dma_spec->slave_id,
+		.m_master = 0,
+		.p_master = 1,
+	};
+
+	return dw_dma_filter(chan, &slave);
+}
+
+void dw_dma_acpi_controller_register(struct dw_dma *dw)
+{
+	struct device *dev = dw->dma.dev;
+	struct acpi_dma_filter_info *info;
+	int ret;
+
+	if (!has_acpi_companion(dev))
+		return;
+
+	info = devm_kzalloc(dev, sizeof(*info), GFP_KERNEL);
+	if (!info)
+		return;
+
+	dma_cap_zero(info->dma_cap);
+	dma_cap_set(DMA_SLAVE, info->dma_cap);
+	info->filter_fn = dw_dma_acpi_filter;
+
+	ret = acpi_dma_controller_register(dev, acpi_dma_simple_xlate, info);
+	if (ret)
+		dev_err(dev, "could not register acpi_dma_controller\n");
+}
+
+void dw_dma_acpi_controller_free(struct dw_dma *dw)
+{
+	struct device *dev = dw->dma.dev;
+
+	if (!has_acpi_companion(dev))
+		return;
+
+	acpi_dma_controller_free(dev);
+}