Merge tag 'dmaengine-5.7-rc1' of git://git.infradead.org/users/vkoul/…

…slave-dma

Pull dmaengine updates from Vinod Koul:
 "Core:
   - Some code cleanup and optimization in core by Andy

   - Debugfs support for displaying dmaengine channels by Peter

  Drivers:
   - New driver for uniphier-xdmac controller

   - Updates to stm32 dma, mdma and dmamux drivers and PM support

   - More updates to idxd drivers

   - Bunch of changes in tegra-apb driver and cleaning up of pm
     functions

   - Bunch of spelling fixes and Replace zero-length array patches

   - Shutdown hook for fsl-dpaa2-qdma driver

   - Support for interleaved transfers for ti-edma and virtualization
     support for k3-dma driver

   - Support for reset and updates in xilinx_dma driver

   - Improvements and locking updates in at_hdma driver"

* tag 'dmaengine-5.7-rc1' of git://git.infradead.org/users/vkoul/slave-dma: (89 commits)
  dt-bindings: dma: renesas,usb-dmac: add r8a77961 support
  dmaengine: uniphier-xdmac: Remove redandant error log for platform_get_irq
  dmaengine: tegra-apb: Improve DMA synchronization
  dmaengine: tegra-apb: Don't save/restore IRQ flags in interrupt handler
  dmaengine: tegra-apb: mark PM functions as __maybe_unused
  dmaengine: fix spelling mistake "exceds" -> "exceeds"
  dmaengine: sprd: Set request pending flag when DMA controller is active
  dmaengine: ppc4xx: Use scnprintf() for avoiding potential buffer overflow
  dmaengine: idxd: remove global token limit check
  dmaengine: idxd: reflect shadow copy of traffic class programming
  dmaengine: idxd: Merge definition of dsa_batch_desc into dsa_hw_desc
  dmaengine: Create debug directories for DMA devices
  dmaengine: ti: k3-udma: Implement custom dbg_summary_show for debugfs
  dmaengine: Add basic debugfs support
  dmaengine: fsl-dpaa2-qdma: remove set but not used variable 'dpaa2_qdma'
  dmaengine: ti: edma: fix null dereference because of a typo in pointer name
  dmaengine: fsl-dpaa2-qdma: Adding shutdown hook
  dmaengine: uniphier-xdmac: Add UniPhier external DMA controller driver
  dt-bindings: dmaengine: Add UniPhier external DMA controller bindings
  dmaengine: ti: k3-udma: Implement support for atype (for virtualization)
  ...

Documentation/devicetree/bindings/dma/renesas,usb-dmac.txt

@@ -16,6 +16,7 @@ Required Properties:
 	  - "renesas,r8a7794-usb-dmac" (R-Car E2)
 	  - "renesas,r8a7795-usb-dmac" (R-Car H3)
 	  - "renesas,r8a7796-usb-dmac" (R-Car M3-W)
+	  - "renesas,r8a77961-usb-dmac" (R-Car M3-W+)
 	  - "renesas,r8a77965-usb-dmac" (R-Car M3-N)
 	  - "renesas,r8a77990-usb-dmac" (R-Car E3)
 	  - "renesas,r8a77995-usb-dmac" (R-Car D3)

Documentation/devicetree/bindings/dma/socionext,uniphier-xdmac.yaml

@@ -0,0 +1,63 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/socionext,uniphier-xdmac.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Socionext UniPhier external DMA controller
+
+description: |
+  This describes the devicetree bindings for an external DMA engine to perform
+  memory-to-memory or peripheral-to-memory data transfer capable of supporting
+  16 channels, implemented in Socionext UniPhier SoCs.
+
+maintainers:
+  - Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
+
+allOf:
+  - $ref: "dma-controller.yaml#"
+
+properties:
+  compatible:
+    const: socionext,uniphier-xdmac
+
+  reg:
+    items:
+      - description: XDMAC base register region (offset and length)
+      - description: XDMAC extension register region (offset and length)
+
+  interrupts:
+    maxItems: 1
+
+  "#dma-cells":
+    const: 2
+    description: |
+      DMA request from clients consists of 2 cells:
+        1. Channel index
+        2. Transfer request factor number, If no transfer factor, use 0.
+           The number is SoC-specific, and this should be specified with
+           relation to the device to use the DMA controller.
+
+  dma-channels:
+    minimum: 1
+    maximum: 16
+
+additionalProperties: false
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - "#dma-cells"
+
+examples:
+  - |
+    xdmac: dma-controller@5fc10000 {
+        compatible = "socionext,uniphier-xdmac";
+        reg = <0x5fc10000 0x1000>, <0x5fc20000 0x800>;
+        interrupts = <0 188 4>;
+        #dma-cells = <2>;
+        dma-channels = <16>;
+    };
+
+...

Documentation/devicetree/bindings/dma/ti-edma.txt

@@ -180,7 +180,7 @@ edma1_tptc0: tptc@27b0000 {
 };
 
 edma1_tptc1: tptc@27b8000 {
-	compatible = "ti, k2g-edma3-tptc", "ti,edma3-tptc";
+	compatible = "ti,k2g-edma3-tptc", "ti,edma3-tptc";
 	reg =	<0x027b8000 0x400>;
 	power-domains = <&k2g_pds 0x4f>;
 };

Documentation/devicetree/bindings/dma/ti/k3-udma.yaml

@@ -45,7 +45,8 @@ allOf:
 
 properties:
   "#dma-cells":
-    const: 1
+    minimum: 1
+    maximum: 2
     description: |
       The cell is the PSI-L  thread ID of the remote (to UDMAP) end.
       Valid ranges for thread ID depends on the data movement direction:
@@ -55,6 +56,8 @@ properties:
       Please refer to the device documentation for the PSI-L thread map and also
       the PSI-L peripheral chapter for the correct thread ID.
 
+      When #dma-cells is 2, the second parameter is the channel ATYPE.
+
   compatible:
     enum:
       - ti,am654-navss-main-udmap
@@ -131,6 +134,20 @@ required:
   - ti,sci-rm-range-rchan
   - ti,sci-rm-range-rflow
 
+if:
+  properties:
+    "#dma-cells":
+      const: 2
+then:
+  properties:
+    ti,udma-atype:
+      description: ATYPE value which should be used by non slave channels
+      allOf:
+        - $ref: /schemas/types.yaml#/definitions/uint32
+
+  required:
+    - ti,udma-atype
+
 examples:
   - |+
     cbass_main {

drivers/dma/Kconfig

@@ -616,8 +616,8 @@ config TXX9_DMAC
 	  integrated in chips such as the Toshiba TX4927/38/39.
 
 config TEGRA20_APB_DMA
-	bool "NVIDIA Tegra20 APB DMA support"
-	depends on ARCH_TEGRA
+	tristate "NVIDIA Tegra20 APB DMA support"
+	depends on ARCH_TEGRA || COMPILE_TEST
 	select DMA_ENGINE
 	help
 	  Support for the NVIDIA Tegra20 APB DMA controller driver. The
@@ -658,6 +658,17 @@ config UNIPHIER_MDMAC
 	  UniPhier platform.  This DMA controller is used as the external
 	  DMA engine of the SD/eMMC controllers of the LD4, Pro4, sLD8 SoCs.
 
+config UNIPHIER_XDMAC
+	tristate "UniPhier XDMAC support"
+	depends on ARCH_UNIPHIER || COMPILE_TEST
+	depends on OF
+	select DMA_ENGINE
+	select DMA_VIRTUAL_CHANNELS
+	help
+	  Enable support for the XDMAC (external DMA controller) on the
+	  UniPhier platform. This DMA controller can transfer data from
+	  memory to memory, memory to peripheral and peripheral to memory.
+
 config XGENE_DMA
 	tristate "APM X-Gene DMA support"
 	depends on ARCH_XGENE || COMPILE_TEST

drivers/dma/Makefile

@@ -78,6 +78,7 @@ obj-$(CONFIG_TEGRA20_APB_DMA) += tegra20-apb-dma.o
 obj-$(CONFIG_TEGRA210_ADMA) += tegra210-adma.o
 obj-$(CONFIG_TIMB_DMA) += timb_dma.o
 obj-$(CONFIG_UNIPHIER_MDMAC) += uniphier-mdmac.o
+obj-$(CONFIG_UNIPHIER_XDMAC) += uniphier-xdmac.o
 obj-$(CONFIG_XGENE_DMA) += xgene-dma.o
 obj-$(CONFIG_ZX_DMA) += zx_dma.o
 obj-$(CONFIG_ST_FDMA) += st_fdma.o