| Message ID | 20220618123035.563070-5-mail@conchuod.ie |
|---|---|
| State | New |
| Headers | show |
| Series | Canaan devicetree fixes | expand |
On 28/06/2022 00:29, Rob Herring wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On Sat, Jun 18, 2022 at 01:30:26PM +0100, Conor Dooley wrote: >> From: Conor Dooley <conor.dooley@microchip.com> >> >> The Canaan k210 apparently has a Sysnopsys Designware AXI DMA >> controller, but according to the documentation & devicetree it has 6 >> interrupts rather than the standard one. Add a custom compatible that >> supports the 6 interrupt configuration which falls back to the standard >> binding which is currently the one in use in the devicetree entry. > > But it works with only 1 interrupt? Seemingly... > >> >> Link: https://canaan-creative.com/wp-content/uploads/2020/03/kendryte_standalone_programming_guide_20190311144158_en.pdf #Page 58 >> Signed-off-by: Conor Dooley <conor.dooley@microchip.com> >> --- >> .../bindings/dma/snps,dw-axi-dmac.yaml | 35 ++++++++++++++----- >> 1 file changed, 26 insertions(+), 9 deletions(-) >> >> diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml >> index 4324a94b26b2..bc85598151ef 100644 >> --- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml >> +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml >> @@ -18,9 +18,13 @@ allOf: >> >> properties: >> compatible: >> - enum: >> - - snps,axi-dma-1.01a >> - - intel,kmb-axi-dma >> + oneOf: >> + - items: >> + - const: canaan,k210-axi-dma >> + - const: snps,axi-dma-1.01a > > I would drop this depending on your need for compatibility. Are you sure > on the IP version? It's not really compatible if the number of > interrupts is different. That's what it has been using until now. Am I sure? No. Do I have docs to go check against? Unfortunately, also no. Does it not qualify as a fallback compatible if it supports a subset of what the hardware does? > >> + - enum: >> + - snps,axi-dma-1.01a >> + - intel,kmb-axi-dma >> >> reg: >> minItems: 1 >> @@ -33,9 +37,6 @@ properties: >> - const: axidma_ctrl_regs >> - const: axidma_apb_regs >> >> - interrupts: >> - maxItems: 1 >> - >> clocks: >> items: >> - description: Bus Clock >> @@ -92,6 +93,22 @@ properties: >> minimum: 1 >> maximum: 256 >> >> +if: >> + properties: >> + compatible: >> + contains: >> + const: canaan,k210-axi-dma >> + >> +then: >> + properties: >> + interrupts: >> + maxItems: 6 >> + >> +else: >> + properties: >> + interrupts: >> + maxItems: 1 >> + >> required: >> - compatible >> - reg >> @@ -105,7 +122,7 @@ required: >> - snps,priority >> - snps,block-size >> >> -additionalProperties: false >> +unevaluatedProperties: false >> >> examples: >> - | >> @@ -113,12 +130,12 @@ examples: >> #include <dt-bindings/interrupt-controller/irq.h> >> /* example with snps,dw-axi-dmac */ >> dmac: dma-controller@80000 { >> - compatible = "snps,axi-dma-1.01a"; >> + compatible = "canaan,k210-axi-dma", "snps,axi-dma-1.01a"; >> reg = <0x80000 0x400>; >> clocks = <&core_clk>, <&cfgr_clk>; >> clock-names = "core-clk", "cfgr-clk"; >> interrupt-parent = <&intc>; >> - interrupts = <27>; >> + interrupts = <27>, <28>, <29>, <30>, <31>, <32>; > > Does the example really need changing? The old one was correct, right? :facepalm:, committed my dt_binding_check test Thanks Rob, Conor. > >> #dma-cells = <1>; >> dma-channels = <4>; >> snps,dma-masters = <2>; >> -- >> 2.36.1 >> >>
Hi Conor, On Tue, Jun 28, 2022 at 8:30 AM <Conor.Dooley@microchip.com> wrote: > On 28/06/2022 00:29, Rob Herring wrote: > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > > > On Sat, Jun 18, 2022 at 01:30:26PM +0100, Conor Dooley wrote: > >> From: Conor Dooley <conor.dooley@microchip.com> > >> > >> The Canaan k210 apparently has a Sysnopsys Designware AXI DMA > >> controller, but according to the documentation & devicetree it has 6 > >> interrupts rather than the standard one. Add a custom compatible that > >> supports the 6 interrupt configuration which falls back to the standard > >> binding which is currently the one in use in the devicetree entry. > > > > But it works with only 1 interrupt? > > Seemingly... The Linux driver uses the only first interrupt. Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
On Tue, Jun 28, 2022 at 09:08:32AM +0200, Geert Uytterhoeven wrote: > Hi Conor, > > On Tue, Jun 28, 2022 at 8:30 AM <Conor.Dooley@microchip.com> wrote: > > On 28/06/2022 00:29, Rob Herring wrote: > > > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > > > > > On Sat, Jun 18, 2022 at 01:30:26PM +0100, Conor Dooley wrote: > > >> From: Conor Dooley <conor.dooley@microchip.com> > > >> > > >> The Canaan k210 apparently has a Sysnopsys Designware AXI DMA > > >> controller, but according to the documentation & devicetree it has 6 > > >> interrupts rather than the standard one. Add a custom compatible that > > >> supports the 6 interrupt configuration which falls back to the standard > > >> binding which is currently the one in use in the devicetree entry. > > > > > > But it works with only 1 interrupt? > > > > Seemingly... > > The Linux driver uses the only first interrupt. Folks, there v2 of this series. A more suitable and justified solution has been given there: Link: https://lore.kernel.org/lkml/20220627213450.ukqai4bsjzcwhnlp@mobilestation/ -Sergey > > Gr{oetje,eeting}s, > > Geert > > -- > Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org > > In personal conversations with technical people, I call myself a hacker. But > when I'm talking to journalists I just say "programmer" or something like that. > -- Linus Torvalds
diff --git a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml index 4324a94b26b2..bc85598151ef 100644 --- a/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml +++ b/Documentation/devicetree/bindings/dma/snps,dw-axi-dmac.yaml @@ -18,9 +18,13 @@ allOf: properties: compatible: - enum: - - snps,axi-dma-1.01a - - intel,kmb-axi-dma + oneOf: + - items: + - const: canaan,k210-axi-dma + - const: snps,axi-dma-1.01a + - enum: + - snps,axi-dma-1.01a + - intel,kmb-axi-dma reg: minItems: 1 @@ -33,9 +37,6 @@ properties: - const: axidma_ctrl_regs - const: axidma_apb_regs - interrupts: - maxItems: 1 - clocks: items: - description: Bus Clock @@ -92,6 +93,22 @@ properties: minimum: 1 maximum: 256 +if: + properties: + compatible: + contains: + const: canaan,k210-axi-dma + +then: + properties: + interrupts: + maxItems: 6 + +else: + properties: + interrupts: + maxItems: 1 + required: - compatible - reg @@ -105,7 +122,7 @@ required: - snps,priority - snps,block-size -additionalProperties: false +unevaluatedProperties: false examples: - | @@ -113,12 +130,12 @@ examples: #include <dt-bindings/interrupt-controller/irq.h> /* example with snps,dw-axi-dmac */ dmac: dma-controller@80000 { - compatible = "snps,axi-dma-1.01a"; + compatible = "canaan,k210-axi-dma", "snps,axi-dma-1.01a"; reg = <0x80000 0x400>; clocks = <&core_clk>, <&cfgr_clk>; clock-names = "core-clk", "cfgr-clk"; interrupt-parent = <&intc>; - interrupts = <27>; + interrupts = <27>, <28>, <29>, <30>, <31>, <32>; #dma-cells = <1>; dma-channels = <4>; snps,dma-masters = <2>;