linux-kernel - Re: [PATCH v6 5/6] dmaengine: sh: rz-dmac: Add RZ/V2H(P) support

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Message-ID: <aAjnc+AxmAn9fxSs@vaman>
Date: Wed, 23 Apr 2025 18:43:23 +0530
From: Vinod Koul <vkoul@...nel.org>
To: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>,
	Magnus Damm <magnus.damm@...il.com>,
	Wolfram Sang <wsa+renesas@...g-engineering.com>,
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>,
	Biju Das <biju.das.jz@...renesas.com>, dmaengine@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v6 5/6] dmaengine: sh: rz-dmac: Add RZ/V2H(P) support

On 22-04-25, 18:39, Fabrizio Castro wrote:
> The DMAC IP found on the Renesas RZ/V2H(P) family of SoCs is
> similar to the version found on the Renesas RZ/G2L family of
> SoCs, but there are some differences:
> * It only uses one register area
> * It only uses one clock
> * It only uses one reset
> * Instead of using MID/IRD it uses REQ No
> * It is connected to the Interrupt Control Unit (ICU)
> * On the RZ/G2L there is only 1 DMAC, on the RZ/V2H(P) there are 5
> 
> Add specific support for the Renesas RZ/V2H(P) family of SoC by
> tackling the aforementioned differences.
> 
> Signed-off-by: Fabrizio Castro <fabrizio.castro.jz@...esas.com>
> Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>
> ---
> v5->v6:
> * Collected tags.
> v4->v5:
> * Reused RZ/G2L cell specification (with REQ No in place of MID/RID).
> * Dropped ACK No.
> * Removed mid_rid/req_no/ack_no union and reused mid_rid for REQ No.
> * Other small improvements.
> v3->v4:
> * Fixed an issue with mid_rid/req_no/ack_no initialization
> v2->v3:
> * Dropped change to Kconfig.
> * Replaced rz_dmac_type with has_icu flag.
> * Put req_no and ack_no in an anonymous struct, nested under an
>   anonymous union with mid_rid.
> * Dropped data field of_rz_dmac_match[], and added logic to determine
>   value of has_icu flag from DT parsing.
> v1->v2:
> * Switched to new macros for minimum values.
> ---
>  drivers/dma/sh/rz-dmac.c | 81 ++++++++++++++++++++++++++++++++++++----
>  1 file changed, 74 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
> index d7a4ce28040b..1f687b08d6b8 100644
> --- a/drivers/dma/sh/rz-dmac.c
> +++ b/drivers/dma/sh/rz-dmac.c
> @@ -14,6 +14,7 @@
>  #include <linux/dmaengine.h>
>  #include <linux/interrupt.h>
>  #include <linux/iopoll.h>
> +#include <linux/irqchip/irq-renesas-rzv2h.h>

This does not exist for me or in the patches that was sent to me. I have
dropped this series due to build failure after picking up dmaengine
patches

drivers/dma/sh/rz-dmac.c:17:10: fatal error: linux/irqchip/irq-renesas-rzv2h.h: No such file or directory

-- 
~Vinod