From: Stephen Boyd <sboyd@kernel.org>
To: Gareth Williams <gareth.williams.jx@renesas.com>,
Geert Uytterhoeven <geert@linux-m68k.org>,
Magnus Damm <magnus.damm@gmail.com>,
Michael Turquette <mturquette@baylibre.com>,
Miquel Raynal <miquel.raynal@bootlin.com>,
Phil Edworthy <phil.edworthy@renesas.com>,
Vinod Koul <vkoul@kernel.org>,
dmaengine@vger.kernel.org, linux-clk@vger.kernel.org,
linux-renesas-soc@vger.kernel.org
Cc: Milan Stevanovic <milan.stevanovic@se.com>,
Jimmy Lalande <jimmy.lalande@se.com>,
Pascal Eberhard <pascal.eberhard@se.com>,
Thomas Petazzoni <thomas.petazzoni@bootlin.com>,
Herve Codina <herve.codina@bootlin.com>,
Clement Leger <clement.leger@bootlin.com>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Viresh Kumar <vireshk@kernel.org>,
Miquel Raynal <miquel.raynal@bootlin.com>
Subject: Re: [PATCH v5 5/8] dmaengine: dw: dmamux: Introduce RZN1 DMA router support
Date: Tue, 15 Mar 2022 15:28:19 -0700 [thread overview]
Message-ID: <20220315222821.2FDBFC340E8@smtp.kernel.org> (raw)
In-Reply-To: <20220315191255.221473-6-miquel.raynal@bootlin.com>
Quoting Miquel Raynal (2022-03-15 12:12:52)
> The Renesas RZN1 DMA IP is based on a DW core, with eg. an additional
> dmamux register located in the system control area which can take up to
> 32 requests (16 per DMA controller). Each DMA channel can be wired to
> two different peripherals.
>
> We need two additional information from the 'dmas' property: the channel
> (bit in the dmamux register) that must be accessed and the value of the
> mux for this channel.
>
> Aside from the driver introduction, as these devices are described as
> subnodes of the system controller, we also need the system controller
> (clock) driver to populate its children manually. Starting from now on,
> one child can be the dmamux.
>
> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
> ---
Acked-by: Stephen Boyd <sboyd@kernel.org>
next prev parent reply other threads:[~2022-03-15 22:28 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-15 19:12 [PATCH v5 0/8] RZN1 DMA support Miquel Raynal
2022-03-15 19:12 ` [PATCH v5 1/8] dt-bindings: dmaengine: Introduce RZN1 dmamux bindings Miquel Raynal
2022-03-15 19:12 ` [PATCH v5 2/8] dt-bindings: clock: r9a06g032-sysctrl: Reference the DMAMUX subnode Miquel Raynal
2022-03-15 22:27 ` Stephen Boyd
2022-03-15 19:12 ` [PATCH v5 3/8] dt-bindings: dmaengine: Introduce RZN1 DMA compatible Miquel Raynal
2022-03-15 19:12 ` [PATCH v5 4/8] soc: renesas: rzn1-sysc: Export function to set dmamux Miquel Raynal
2022-03-15 22:28 ` Stephen Boyd
2022-04-04 12:55 ` Miquel Raynal
2022-03-15 19:12 ` [PATCH v5 5/8] dmaengine: dw: dmamux: Introduce RZN1 DMA router support Miquel Raynal
2022-03-15 22:28 ` Stephen Boyd [this message]
2022-03-15 19:12 ` [PATCH v5 6/8] dmaengine: dw: Add RZN1 compatible Miquel Raynal
2022-03-15 19:12 ` [PATCH v5 7/8] ARM: dts: r9a06g032: Add the two DMA nodes Miquel Raynal
2022-03-15 19:12 ` [PATCH v5 8/8] ARM: dts: r9a06g032: Describe the DMA router Miquel Raynal
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