* [PATCH 0/3] Remove shdma DT support
@ 2021-06-11 10:18 Geert Uytterhoeven
2021-06-16 10:38 ` Vinod Koul
2021-06-16 10:42 ` John Paul Adrian Glaubitz
0 siblings, 2 replies; 4+ messages in thread
From: Geert Uytterhoeven @ 2021-06-11 10:18 UTC (permalink / raw)
To: Rob Herring, Vinod Koul, Magnus Damm
Cc: Guennadi Liakhovetski, Laurent Pinchart, devicetree, dmaengine,
linux-renesas-soc, linux-sh, linux-arm-kernel,
Geert Uytterhoeven
Hi all,
Documentation/devicetree/bindings/dma/renesas,shdma.txt is one of the
few^W57% of the DT bindings that haven't been converted to json-schema
yet. These bindings were originally intended to cover all SH/R-Mobile
SoCs, but the DMA multiplexer node and one DMA controller instance were
only ever added to one .dtsi file, for R-Mobile APE6. Still, DMA
support for R-Mobile APE6 was never completed to the point that it would
actually work, cfr. commit a19788612f51b787 ("dmaengine: sh: Remove
R-Mobile APE6 support"). Later, the mux idea was dropped when
implementing support for DMA on (very similar) R-Car Gen2, cfr.
renesas,rcar-dmac.yaml.
Hence this series removes the Renesas SHDMA Device Tree bindings, the
SHDMA DMA multiplexer driver, and the corresponding description in the
R-Mobile APE6 DTS.
I plan to queue [PATCH 3/3] in renesas-devel for v5.15.
Thanks for your comments!
Geert Uytterhoeven (3):
dt-bindings: dmaengine: Remove SHDMA Device Tree bindings
dmaengine: sh: Remove unused shdma-of driver
ARM: dts: r8a73a4: Remove non-functional DMA support
.../devicetree/bindings/dma/renesas,shdma.txt | 84 -------------------
arch/arm/boot/dts/r8a73a4.dtsi | 44 ----------
drivers/dma/sh/Makefile | 2 +-
drivers/dma/sh/shdma-of.c | 76 -----------------
4 files changed, 1 insertion(+), 205 deletions(-)
delete mode 100644 Documentation/devicetree/bindings/dma/renesas,shdma.txt
delete mode 100644 drivers/dma/sh/shdma-of.c
--
2.25.1
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
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 0/3] Remove shdma DT support
2021-06-11 10:18 [PATCH 0/3] Remove shdma DT support Geert Uytterhoeven
@ 2021-06-16 10:38 ` Vinod Koul
2021-06-16 10:42 ` John Paul Adrian Glaubitz
1 sibling, 0 replies; 4+ messages in thread
From: Vinod Koul @ 2021-06-16 10:38 UTC (permalink / raw)
To: Geert Uytterhoeven
Cc: Rob Herring, Magnus Damm, Guennadi Liakhovetski,
Laurent Pinchart, devicetree, dmaengine, linux-renesas-soc,
linux-sh, linux-arm-kernel
On 11-06-21, 12:18, Geert Uytterhoeven wrote:
> Hi all,
>
> Documentation/devicetree/bindings/dma/renesas,shdma.txt is one of the
> few^W57% of the DT bindings that haven't been converted to json-schema
> yet. These bindings were originally intended to cover all SH/R-Mobile
> SoCs, but the DMA multiplexer node and one DMA controller instance were
> only ever added to one .dtsi file, for R-Mobile APE6. Still, DMA
> support for R-Mobile APE6 was never completed to the point that it would
> actually work, cfr. commit a19788612f51b787 ("dmaengine: sh: Remove
> R-Mobile APE6 support"). Later, the mux idea was dropped when
> implementing support for DMA on (very similar) R-Car Gen2, cfr.
> renesas,rcar-dmac.yaml.
>
> Hence this series removes the Renesas SHDMA Device Tree bindings, the
> SHDMA DMA multiplexer driver, and the corresponding description in the
> R-Mobile APE6 DTS.
Applied 1 & 2, thanks
--
~Vinod
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 0/3] Remove shdma DT support
2021-06-11 10:18 [PATCH 0/3] Remove shdma DT support Geert Uytterhoeven
2021-06-16 10:38 ` Vinod Koul
@ 2021-06-16 10:42 ` John Paul Adrian Glaubitz
2021-06-16 11:18 ` Geert Uytterhoeven
1 sibling, 1 reply; 4+ messages in thread
From: John Paul Adrian Glaubitz @ 2021-06-16 10:42 UTC (permalink / raw)
To: Geert Uytterhoeven, Rob Herring, Vinod Koul, Magnus Damm
Cc: Guennadi Liakhovetski, Laurent Pinchart, devicetree, dmaengine,
linux-renesas-soc, linux-sh, linux-arm-kernel
Hi Geert!
On 6/11/21 12:18 PM, Geert Uytterhoeven wrote:
> Hence this series removes the Renesas SHDMA Device Tree bindings, the
> SHDMA DMA multiplexer driver, and the corresponding description in the
> R-Mobile APE6 DTS.
Do these changes make life harder in case we want to convert SH to device
tree as already prepared by Yoshinori Sato? [1]
Adrian
> [1] https://lore.kernel.org/patchwork/cover/693910/
--
.''`. John Paul Adrian Glaubitz
: :' : Debian Developer - glaubitz@debian.org
`. `' Freie Universitaet Berlin - glaubitz@physik.fu-berlin.de
`- GPG: 62FF 8A75 84E0 2956 9546 0006 7426 3B37 F5B5 F913
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH 0/3] Remove shdma DT support
2021-06-16 10:42 ` John Paul Adrian Glaubitz
@ 2021-06-16 11:18 ` Geert Uytterhoeven
0 siblings, 0 replies; 4+ messages in thread
From: Geert Uytterhoeven @ 2021-06-16 11:18 UTC (permalink / raw)
To: John Paul Adrian Glaubitz
Cc: Rob Herring, Vinod Koul, Magnus Damm, Guennadi Liakhovetski,
Laurent Pinchart,
open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS,
dmaengine, Linux-Renesas, Linux-sh list, Linux ARM, Chris Brandt
Hi Adrian,
On Wed, Jun 16, 2021 at 12:42 PM John Paul Adrian Glaubitz
<glaubitz@physik.fu-berlin.de> wrote:
> On 6/11/21 12:18 PM, Geert Uytterhoeven wrote:
> > Hence this series removes the Renesas SHDMA Device Tree bindings, the
> > SHDMA DMA multiplexer driver, and the corresponding description in the
> > R-Mobile APE6 DTS.
> Do these changes make life harder in case we want to convert SH to device
> tree as already prepared by Yoshinori Sato? [1]
Probably not. The only modern DT-aware DMAC drivers for Renesas
hardware are drivers/dma/sh/{rcar,usb}-dmac.c. Soon there will be
drivers/dma/sh/rz-dmac.c, for RZ/G2L (and RZ/A1 and RZ/A2 later).
Given the R-Car DMAC is very similar to the SH/R-Mobile DMAC, the
latter may be made to work with rcar-dmac.c, if anyone is willing
to spend cycles on that. Likewise, the RZ/A DMAC probably has its
roots in older SH SoCs, so that may be helpful for you, too.
Chris (CCed) may know better...
> > [1] https://lore.kernel.org/patchwork/cover/693910/
None of these handle DMA?
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
^ permalink raw reply [flat|nested] 4+ messages in thread
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2021-06-11 10:18 [PATCH 0/3] Remove shdma DT support Geert Uytterhoeven
2021-06-16 10:38 ` Vinod Koul
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