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ce1d3fde87
Pull dmaengine updates from Vinod Koul:
"This update brings:
- the big cleanup up by Maxime for device control and slave
capabilities. This makes the API much cleaner.
- new IMG MDC driver by Andrew
- new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
bunch of fixes on rcar drivers
- odd fixes and updates spread over driver"
* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
dmaengine: pl330: add DMA_PAUSE feature
dmaengine: pl330: improve pl330_tx_status() function
dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
dmaengine: rcar-dmac: Fix spinlock issues in interrupt
dmaenegine: edma: fix sparse warnings
dmaengine: rcar-dmac: Fix uninitialized variable usage
dmaengine: shdmac: extend PM methods
dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
dmaengine: pl330: fix bug that cause start the same descs in cyclic
dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
dmaengine: at_xdmac: simplify channel configuration stuff
dmaengine: at_xdmac: introduce save_cc field
dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
ioat: fail self-test if wait_for_completion times out
dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
dmaengine: dw: amend description of dma_dev field
dmatest: move src_off, dst_off, len inside loop
...
96 lines
3.3 KiB
Plaintext
96 lines
3.3 KiB
Plaintext
* Renesas R-Car DMA Controller Device Tree bindings
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Renesas R-Car Generation 2 SoCs have multiple multi-channel DMA
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controller instances named DMAC capable of serving multiple clients. Channels
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can be dedicated to specific clients or shared between a large number of
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clients.
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Each DMA client is connected to one dedicated port of the DMAC, identified by
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an 8-bit port number called the MID/RID. A DMA controller can thus serve up to
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256 clients in total. When the number of hardware channels is lower than the
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number of clients to be served, channels must be shared between multiple DMA
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clients. The association of DMA clients to DMAC channels is fully dynamic and
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not described in these device tree bindings.
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Required Properties:
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- compatible: must contain "renesas,rcar-dmac"
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- reg: base address and length of the registers block for the DMAC
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- interrupts: interrupt specifiers for the DMAC, one for each entry in
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interrupt-names.
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- interrupt-names: one entry per channel, named "ch%u", where %u is the
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channel number ranging from zero to the number of channels minus one.
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- clock-names: "fck" for the functional clock
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- clocks: a list of phandle + clock-specifier pairs, one for each entry
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in clock-names.
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- clock-names: must contain "fck" for the functional clock.
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- #dma-cells: must be <1>, the cell specifies the MID/RID of the DMAC port
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connected to the DMA client
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- dma-channels: number of DMA channels
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Example: R8A7790 (R-Car H2) SYS-DMACs
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dmac0: dma-controller@e6700000 {
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compatible = "renesas,rcar-dmac";
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reg = <0 0xe6700000 0 0x20000>;
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interrupts = <0 197 IRQ_TYPE_LEVEL_HIGH
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0 200 IRQ_TYPE_LEVEL_HIGH
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0 201 IRQ_TYPE_LEVEL_HIGH
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0 202 IRQ_TYPE_LEVEL_HIGH
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0 203 IRQ_TYPE_LEVEL_HIGH
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0 204 IRQ_TYPE_LEVEL_HIGH
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0 205 IRQ_TYPE_LEVEL_HIGH
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0 206 IRQ_TYPE_LEVEL_HIGH
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0 207 IRQ_TYPE_LEVEL_HIGH
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0 208 IRQ_TYPE_LEVEL_HIGH
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0 209 IRQ_TYPE_LEVEL_HIGH
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0 210 IRQ_TYPE_LEVEL_HIGH
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0 211 IRQ_TYPE_LEVEL_HIGH
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0 212 IRQ_TYPE_LEVEL_HIGH
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0 213 IRQ_TYPE_LEVEL_HIGH
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0 214 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "error",
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"ch0", "ch1", "ch2", "ch3",
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"ch4", "ch5", "ch6", "ch7",
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"ch8", "ch9", "ch10", "ch11",
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"ch12", "ch13", "ch14";
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clocks = <&mstp2_clks R8A7790_CLK_SYS_DMAC0>;
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clock-names = "fck";
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#dma-cells = <1>;
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dma-channels = <15>;
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};
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dmac1: dma-controller@e6720000 {
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compatible = "renesas,rcar-dmac";
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reg = <0 0xe6720000 0 0x20000>;
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interrupts = <0 220 IRQ_TYPE_LEVEL_HIGH
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0 216 IRQ_TYPE_LEVEL_HIGH
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0 217 IRQ_TYPE_LEVEL_HIGH
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0 218 IRQ_TYPE_LEVEL_HIGH
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0 219 IRQ_TYPE_LEVEL_HIGH
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0 308 IRQ_TYPE_LEVEL_HIGH
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0 309 IRQ_TYPE_LEVEL_HIGH
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0 310 IRQ_TYPE_LEVEL_HIGH
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0 311 IRQ_TYPE_LEVEL_HIGH
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0 312 IRQ_TYPE_LEVEL_HIGH
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0 313 IRQ_TYPE_LEVEL_HIGH
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0 314 IRQ_TYPE_LEVEL_HIGH
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0 315 IRQ_TYPE_LEVEL_HIGH
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0 316 IRQ_TYPE_LEVEL_HIGH
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0 317 IRQ_TYPE_LEVEL_HIGH
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0 318 IRQ_TYPE_LEVEL_HIGH>;
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interrupt-names = "error",
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"ch0", "ch1", "ch2", "ch3",
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"ch4", "ch5", "ch6", "ch7",
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"ch8", "ch9", "ch10", "ch11",
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"ch12", "ch13", "ch14";
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clocks = <&mstp2_clks R8A7790_CLK_SYS_DMAC1>;
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clock-names = "fck";
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#dma-cells = <1>;
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dma-channels = <15>;
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};
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