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authorLinus Torvalds <torvalds@linux-foundation.org>2019-09-18 05:04:40 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2019-09-18 05:04:40 +0300
commit04cbfba6208592999d7bfe6609ec01dc3fde73f5 (patch)
tree78182160d45c82792a3a8607d3f95b87703dbfa9 /Documentation
parent4feaab05dc1eda3dbb57b097377766002e7a7cb9 (diff)
parentc5c6faaee6e0c374c7dfaf053aa23750f5a68e20 (diff)
downloadlinux-04cbfba6208592999d7bfe6609ec01dc3fde73f5.tar.xz
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 ...
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/dma/allwinner,sun4i-a10-dma.yaml55
-rw-r--r--Documentation/devicetree/bindings/dma/allwinner,sun50i-a64-dma.yaml88
-rw-r--r--Documentation/devicetree/bindings/dma/allwinner,sun6i-a31-dma.yaml62
-rw-r--r--Documentation/devicetree/bindings/dma/dma-common.yaml45
-rw-r--r--Documentation/devicetree/bindings/dma/dma-controller.yaml35
-rw-r--r--Documentation/devicetree/bindings/dma/dma-router.yaml50
-rw-r--r--Documentation/devicetree/bindings/dma/dma.txt114
-rw-r--r--Documentation/devicetree/bindings/dma/renesas,nbpfaxi.txt (renamed from Documentation/devicetree/bindings/dma/nbpfaxi.txt)0
-rw-r--r--Documentation/devicetree/bindings/dma/renesas,shdma.txt (renamed from Documentation/devicetree/bindings/dma/shdma.txt)0
-rw-r--r--Documentation/devicetree/bindings/dma/sun4i-dma.txt45
-rw-r--r--Documentation/devicetree/bindings/dma/sun6i-dma.txt81
11 files changed, 336 insertions, 239 deletions
diff --git a/Documentation/devicetree/bindings/dma/allwinner,sun4i-a10-dma.yaml b/Documentation/devicetree/bindings/dma/allwinner,sun4i-a10-dma.yaml
new file mode 100644
index 000000000000..15abc0f9429f
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/allwinner,sun4i-a10-dma.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/allwinner,sun4i-a10-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A10 DMA Controller Device Tree Bindings
+
+maintainers:
+ - Chen-Yu Tsai <wens@csie.org>
+ - Maxime Ripard <maxime.ripard@bootlin.com>
+
+allOf:
+ - $ref: "dma-controller.yaml#"
+
+properties:
+ "#dma-cells":
+ const: 2
+ description:
+ The first cell is either 0 or 1, the former to use the normal
+ DMA, 1 for dedicated DMA. The second cell is the request line
+ number.
+
+ compatible:
+ const: allwinner,sun4i-a10-dma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+required:
+ - "#dma-cells"
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+
+additionalProperties: false
+
+examples:
+ - |
+ dma: dma-controller@1c02000 {
+ compatible = "allwinner,sun4i-a10-dma";
+ reg = <0x01c02000 0x1000>;
+ interrupts = <27>;
+ clocks = <&ahb_gates 6>;
+ #dma-cells = <2>;
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/allwinner,sun50i-a64-dma.yaml b/Documentation/devicetree/bindings/dma/allwinner,sun50i-a64-dma.yaml
new file mode 100644
index 000000000000..4cb9d6b93138
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/allwinner,sun50i-a64-dma.yaml
@@ -0,0 +1,88 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/allwinner,sun50i-a64-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A64 DMA Controller Device Tree Bindings
+
+maintainers:
+ - Chen-Yu Tsai <wens@csie.org>
+ - Maxime Ripard <maxime.ripard@bootlin.com>
+
+allOf:
+ - $ref: "dma-controller.yaml#"
+
+properties:
+ "#dma-cells":
+ const: 1
+ description: The cell is the request line number.
+
+ compatible:
+ enum:
+ - allwinner,sun50i-a64-dma
+ - allwinner,sun50i-h6-dma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ minItems: 1
+ maxItems: 2
+
+ clock-names:
+ items:
+ - const: bus
+ - const: mbus
+
+ resets:
+ maxItems: 1
+
+required:
+ - "#dma-cells"
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - resets
+ - dma-channels
+
+if:
+ properties:
+ compatible:
+ const: allwinner,sun50i-h6-dma
+
+then:
+ properties:
+ clocks:
+ maxItems: 2
+
+ required:
+ - clock-names
+
+else:
+ properties:
+ clocks:
+ maxItems: 1
+
+# FIXME: We should set it, but it would report all the generic
+# properties as additional properties.
+# additionalProperties: false
+
+examples:
+ - |
+ dma: dma-controller@1c02000 {
+ compatible = "allwinner,sun50i-a64-dma";
+ reg = <0x01c02000 0x1000>;
+ interrupts = <0 50 4>;
+ clocks = <&ccu 30>;
+ dma-channels = <8>;
+ dma-requests = <27>;
+ resets = <&ccu 7>;
+ #dma-cells = <1>;
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/allwinner,sun6i-a31-dma.yaml b/Documentation/devicetree/bindings/dma/allwinner,sun6i-a31-dma.yaml
new file mode 100644
index 000000000000..740b7f9b535b
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/allwinner,sun6i-a31-dma.yaml
@@ -0,0 +1,62 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/allwinner,sun6i-a31-dma.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Allwinner A31 DMA Controller Device Tree Bindings
+
+maintainers:
+ - Chen-Yu Tsai <wens@csie.org>
+ - Maxime Ripard <maxime.ripard@bootlin.com>
+
+allOf:
+ - $ref: "dma-controller.yaml#"
+
+properties:
+ "#dma-cells":
+ const: 1
+ description: The cell is the request line number.
+
+ compatible:
+ oneOf:
+ - const: allwinner,sun6i-a31-dma
+ - const: allwinner,sun8i-a23-dma
+ - const: allwinner,sun8i-a83t-dma
+ - const: allwinner,sun8i-h3-dma
+ - const: allwinner,sun8i-v3s-dma
+
+ reg:
+ maxItems: 1
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ maxItems: 1
+
+ resets:
+ maxItems: 1
+
+required:
+ - "#dma-cells"
+ - compatible
+ - reg
+ - interrupts
+ - clocks
+ - resets
+
+additionalProperties: false
+
+examples:
+ - |
+ dma: dma-controller@1c02000 {
+ compatible = "allwinner,sun6i-a31-dma";
+ reg = <0x01c02000 0x1000>;
+ interrupts = <0 50 4>;
+ clocks = <&ahb1_gates 6>;
+ resets = <&ahb1_rst 6>;
+ #dma-cells = <1>;
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/dma-common.yaml b/Documentation/devicetree/bindings/dma/dma-common.yaml
new file mode 100644
index 000000000000..ed0a49a6f020
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/dma-common.yaml
@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/dma-common.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DMA Engine Generic Binding
+
+maintainers:
+ - Vinod Koul <vkoul@kernel.org>
+
+description:
+ Generic binding to provide a way for a driver using DMA Engine to
+ retrieve the DMA request or channel information that goes from a
+ hardware device to a DMA controller.
+
+select: false
+
+properties:
+ "#dma-cells":
+ minimum: 1
+ # Should be enough
+ maximum: 255
+ description:
+ Used to provide DMA controller specific information.
+
+ dma-channel-mask:
+ $ref: /schemas/types.yaml#definitions/uint32
+ description:
+ Bitmask of available DMA channels in ascending order that are
+ not reserved by firmware and are available to the
+ kernel. i.e. first channel corresponds to LSB.
+
+ dma-channels:
+ $ref: /schemas/types.yaml#definitions/uint32
+ description:
+ Number of DMA channels supported by the controller.
+
+ dma-requests:
+ $ref: /schemas/types.yaml#definitions/uint32
+ description:
+ Number of DMA request signals supported by the controller.
+
+required:
+ - "#dma-cells"
diff --git a/Documentation/devicetree/bindings/dma/dma-controller.yaml b/Documentation/devicetree/bindings/dma/dma-controller.yaml
new file mode 100644
index 000000000000..c39f6de76670
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/dma-controller.yaml
@@ -0,0 +1,35 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/dma-controller.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DMA Controller Generic Binding
+
+maintainers:
+ - Vinod Koul <vkoul@kernel.org>
+
+allOf:
+ - $ref: "dma-common.yaml#"
+
+# Everything else is described in the common file
+properties:
+ $nodename:
+ pattern: "^dma-controller(@.*)?$"
+
+examples:
+ - |
+ dma: dma-controller@48000000 {
+ compatible = "ti,omap-sdma";
+ reg = <0x48000000 0x1000>;
+ interrupts = <0 12 0x4
+ 0 13 0x4
+ 0 14 0x4
+ 0 15 0x4>;
+ #dma-cells = <1>;
+ dma-channels = <32>;
+ dma-requests = <127>;
+ dma-channel-mask = <0xfffe>;
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/dma-router.yaml b/Documentation/devicetree/bindings/dma/dma-router.yaml
new file mode 100644
index 000000000000..5b5f07393135
--- /dev/null
+++ b/Documentation/devicetree/bindings/dma/dma-router.yaml
@@ -0,0 +1,50 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/dma/dma-router.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: DMA Router Generic Binding
+
+maintainers:
+ - Vinod Koul <vkoul@kernel.org>
+
+allOf:
+ - $ref: "dma-common.yaml#"
+
+description:
+ DMA routers are transparent IP blocks used to route DMA request
+ lines from devices to the DMA controller. Some SoCs (like TI DRA7x)
+ have more peripherals integrated with DMA requests than what the DMA
+ controller can handle directly.
+
+properties:
+ $nodename:
+ pattern: "^dma-router(@.*)?$"
+
+ dma-masters:
+ $ref: /schemas/types.yaml#definitions/phandle-array
+ description:
+ Array of phandles to the DMA controllers the router can direct
+ the signal to.
+
+ dma-requests:
+ description:
+ Number of incoming request lines the router can handle.
+
+required:
+ - "#dma-cells"
+ - dma-masters
+
+examples:
+ - |
+ sdma_xbar: dma-router@4a002b78 {
+ compatible = "ti,dra7-dma-crossbar";
+ reg = <0x4a002b78 0xfc>;
+ #dma-cells = <1>;
+ dma-requests = <205>;
+ ti,dma-safe-map = <0>;
+ dma-masters = <&sdma>;
+ };
+
+...
diff --git a/Documentation/devicetree/bindings/dma/dma.txt b/Documentation/devicetree/bindings/dma/dma.txt
index eeb4e4d1771e..90a67a016a48 100644
--- a/Documentation/devicetree/bindings/dma/dma.txt
+++ b/Documentation/devicetree/bindings/dma/dma.txt
@@ -1,113 +1 @@
-* Generic DMA Controller and DMA request bindings
-
-Generic binding to provide a way for a driver using DMA Engine to retrieve the
-DMA request or channel information that goes from a hardware device to a DMA
-controller.
-
-
-* DMA controller
-
-Required property:
-- #dma-cells: Must be at least 1. Used to provide DMA controller
- specific information. See DMA client binding below for
- more details.
-
-Optional properties:
-- dma-channels: Number of DMA channels supported by the controller.
-- dma-requests: Number of DMA request signals supported by the
- controller.
-- dma-channel-mask: Bitmask of available DMA channels in ascending order
- that are not reserved by firmware and are available to
- the kernel. i.e. first channel corresponds to LSB.
-
-Example:
-
- dma: dma@48000000 {
- compatible = "ti,omap-sdma";
- reg = <0x48000000 0x1000>;
- interrupts = <0 12 0x4
- 0 13 0x4
- 0 14 0x4
- 0 15 0x4>;
- #dma-cells = <1>;
- dma-channels = <32>;
- dma-requests = <127>;
- dma-channel-mask = <0xfffe>
- };
-
-* DMA router
-
-DMA routers are transparent IP blocks used to route DMA request lines from
-devices to the DMA controller. Some SoCs (like TI DRA7x) have more peripherals
-integrated with DMA requests than what the DMA controller can handle directly.
-
-Required property:
-- dma-masters: phandle of the DMA controller or list of phandles for
- the DMA controllers the router can direct the signal to.
-- #dma-cells: Must be at least 1. Used to provide DMA router specific
- information. See DMA client binding below for more
- details.
-
-Optional properties:
-- dma-requests: Number of incoming request lines the router can handle.
-- In the node pointed by the dma-masters:
- - dma-requests: The router driver might need to look for this in order
- to configure the routing.
-
-Example:
- sdma_xbar: dma-router@4a002b78 {
- compatible = "ti,dra7-dma-crossbar";
- reg = <0x4a002b78 0xfc>;
- #dma-cells = <1>;
- dma-requests = <205>;
- ti,dma-safe-map = <0>;
- dma-masters = <&sdma>;
- };
-
-* DMA client
-
-Client drivers should specify the DMA property using a phandle to the controller
-followed by DMA controller specific data.
-
-Required property:
-- dmas: List of one or more DMA specifiers, each consisting of
- - A phandle pointing to DMA controller node
- - A number of integer cells, as determined by the
- #dma-cells property in the node referenced by phandle
- containing DMA controller specific information. This
- typically contains a DMA request line number or a
- channel number, but can contain any data that is
- required for configuring a channel.
-- dma-names: Contains one identifier string for each DMA specifier in
- the dmas property. The specific strings that can be used
- are defined in the binding of the DMA client device.
- Multiple DMA specifiers can be used to represent
- alternatives and in this case the dma-names for those
- DMA specifiers must be identical (see examples).
-
-Examples:
-
-1. A device with one DMA read channel, one DMA write channel:
-
- i2c1: i2c@1 {
- ...
- dmas = <&dma 2 /* read channel */
- &dma 3>; /* write channel */
- dma-names = "rx", "tx";
- ...
- };
-
-2. A single read-write channel with three alternative DMA controllers:
-
- dmas = <&dma1 5
- &dma2 7
- &dma3 2>;
- dma-names = "rx-tx", "rx-tx", "rx-tx";
-
-3. A device with three channels, one of which has two alternatives:
-
- dmas = <&dma1 2 /* read channel */
- &dma1 3 /* write channel */
- &dma2 0 /* error read */
- &dma3 0>; /* alternative error read */
- dma-names = "rx", "tx", "error", "error";
+This file has been moved to dma-controller.yaml.
diff --git a/Documentation/devicetree/bindings/dma/nbpfaxi.txt b/Documentation/devicetree/bindings/dma/renesas,nbpfaxi.txt
index d2e1e62e346a..d2e1e62e346a 100644
--- a/Documentation/devicetree/bindings/dma/nbpfaxi.txt
+++ b/Documentation/devicetree/bindings/dma/renesas,nbpfaxi.txt
diff --git a/Documentation/devicetree/bindings/dma/shdma.txt b/Documentation/devicetree/bindings/dma/renesas,shdma.txt
index a91920a49433..a91920a49433 100644
--- a/Documentation/devicetree/bindings/dma/shdma.txt
+++ b/Documentation/devicetree/bindings/dma/renesas,shdma.txt
diff --git a/Documentation/devicetree/bindings/dma/sun4i-dma.txt b/Documentation/devicetree/bindings/dma/sun4i-dma.txt
deleted file mode 100644
index 8ad556aca70b..000000000000
--- a/Documentation/devicetree/bindings/dma/sun4i-dma.txt
+++ /dev/null
@@ -1,45 +0,0 @@
-Allwinner A10 DMA Controller
-
-This driver follows the generic DMA bindings defined in dma.txt.
-
-Required properties:
-
-- compatible: Must be "allwinner,sun4i-a10-dma"
-- reg: Should contain the registers base address and length
-- interrupts: Should contain a reference to the interrupt used by this device
-- clocks: Should contain a reference to the parent AHB clock
-- #dma-cells : Should be 2, first cell denoting normal or dedicated dma,
- second cell holding the request line number.
-
-Example:
- dma: dma-controller@1c02000 {
- compatible = "allwinner,sun4i-a10-dma";
- reg = <0x01c02000 0x1000>;
- interrupts = <27>;
- clocks = <&ahb_gates 6>;
- #dma-cells = <2>;
- };
-
-Clients:
-
-DMA clients connected to the Allwinner A10 DMA controller must use the
-format described in the dma.txt file, using a three-cell specifier for
-each channel: a phandle plus two integer cells.
-The three cells in order are:
-
-1. A phandle pointing to the DMA controller.
-2. Whether it is using normal (0) or dedicated (1) channels
-3. The port ID as specified in the datasheet
-
-Example:
- spi2: spi@1c17000 {
- compatible = "allwinner,sun4i-a10-spi";
- reg = <0x01c17000 0x1000>;
- interrupts = <0 12 4>;
- clocks = <&ahb_gates 22>, <&spi2_clk>;
- clock-names = "ahb", "mod";
- dmas = <&dma 1 29>, <&dma 1 28>;
- dma-names = "rx", "tx";
- #address-cells = <1>;
- #size-cells = <0>;
- };
diff --git a/Documentation/devicetree/bindings/dma/sun6i-dma.txt b/Documentation/devicetree/bindings/dma/sun6i-dma.txt
deleted file mode 100644
index cae31f4e77ba..000000000000
--- a/Documentation/devicetree/bindings/dma/sun6i-dma.txt
+++ /dev/null
@@ -1,81 +0,0 @@
-Allwinner A31 DMA Controller
-
-This driver follows the generic DMA bindings defined in dma.txt.
-
-Required properties:
-
-- compatible: Must be one of
- "allwinner,sun6i-a31-dma"
- "allwinner,sun8i-a23-dma"
- "allwinner,sun8i-a83t-dma"
- "allwinner,sun8i-h3-dma"
- "allwinner,sun8i-v3s-dma"
-- reg: Should contain the registers base address and length
-- interrupts: Should contain a reference to the interrupt used by this device
-- clocks: Should contain a reference to the parent AHB clock
-- resets: Should contain a reference to the reset controller asserting
- this device in reset
-- #dma-cells : Should be 1, a single cell holding a line request number
-
-Example:
- dma: dma-controller@1c02000 {
- compatible = "allwinner,sun6i-a31-dma";
- reg = <0x01c02000 0x1000>;
- interrupts = <0 50 4>;
- clocks = <&ahb1_gates 6>;
- resets = <&ahb1_rst 6>;
- #dma-cells = <1>;
- };
-
-------------------------------------------------------------------------------
-For A64 and H6 DMA controller:
-
-Required properties:
-- compatible: Must be one of
- "allwinner,sun50i-a64-dma"
- "allwinner,sun50i-h6-dma"
-- dma-channels: Number of DMA channels supported by the controller.
- Refer to Documentation/devicetree/bindings/dma/dma.txt
-- clocks: In addition to parent AHB clock, it should also contain mbus
- clock (H6 only)
-- clock-names: Should contain "bus" and "mbus" (H6 only)
-- all properties above, i.e. reg, interrupts, clocks, resets and #dma-cells
-
-Optional properties:
-- dma-requests: Number of DMA request signals supported by the controller.
- Refer to Documentation/devicetree/bindings/dma/dma.txt
-
-Example:
- dma: dma-controller@1c02000 {
- compatible = "allwinner,sun50i-a64-dma";
- reg = <0x01c02000 0x1000>;
- interrupts = <GIC_SPI 50 IRQ_TYPE_LEVEL_HIGH>;
- clocks = <&ccu CLK_BUS_DMA>;
- dma-channels = <8>;
- dma-requests = <27>;
- resets = <&ccu RST_BUS_DMA>;
- #dma-cells = <1>;
- };
-------------------------------------------------------------------------------
-
-Clients:
-
-DMA clients connected to the A31 DMA controller must use the format
-described in the dma.txt file, using a two-cell specifier for each
-channel: a phandle plus one integer cells.
-The two cells in order are:
-
-1. A phandle pointing to the DMA controller.
-2. The port ID as specified in the datasheet
-
-Example:
-spi2: spi@1c6a000 {
- compatible = "allwinner,sun6i-a31-spi";
- reg = <0x01c6a000 0x1000>;
- interrupts = <0 67 4>;
- clocks = <&ahb1_gates 22>, <&spi2_clk>;
- clock-names = "ahb", "mod";
- dmas = <&dma 25>, <&dma 25>;
- dma-names = "rx", "tx";
- resets = <&ahb1_rst 22>;
-};