From: Rob Herring <robh@kernel.org>
To: Peter Ujfalusi <peter.ujfalusi@ti.com>
Cc: vkoul@kernel.org, dmaengine@vger.kernel.org,
linux-kernel@vger.kernel.org, dan.j.williams@intel.com,
devicetree@vger.kernel.org
Subject: Re: [PATCH v2 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA
Date: Wed, 18 Sep 2019 08:29:31 -0500 [thread overview]
Message-ID: <20190918132931.GA14832@bogus> (raw)
In-Reply-To: <20190910114559.22810-3-peter.ujfalusi@ti.com>
On Tue, Sep 10, 2019 at 02:45:58PM +0300, Peter Ujfalusi wrote:
> Similarly to paRAM slots, channels can be used by other cores.
>
> The common dma-channel-mask property can be used for specifying the
> available channels.
>
> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
> ---
> Documentation/devicetree/bindings/dma/ti-edma.txt | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
> index 4bbc94d829c8..3c7736246354 100644
> --- a/Documentation/devicetree/bindings/dma/ti-edma.txt
> +++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
> @@ -42,6 +42,9 @@ Optional properties:
> - ti,edma-reserved-slot-ranges: PaRAM slot ranges which should not be used by
> the driver, they are allocated to be used by for example the
> DSP. See example.
> +- dma-channel-mask: Mask of usable channels, see
> + Documentation/devicetree/bindings/dma/dma-common.yaml
> +
What's the size? 2 cells?
>
> ------------------------------------------------------------------------------
> eDMA3 Transfer Controller
> @@ -91,6 +94,9 @@ edma: edma@49000000 {
> ti,edma-memcpy-channels = <20 21>;
> /* The following PaRAM slots are reserved: 35-44 and 100-109 */
> ti,edma-reserved-slot-ranges = <35 10>, <100 10>;
> + /* The following channels are reserved: 35-44 */
> + dma-channel-mask = <0xffffffff>, /* Channel 0-31 */
> + <0xffffe007>; /* Channel 32-63 */
> };
>
> edma_tptc0: tptc@49800000 {
> --
> Peter
>
> Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
> Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
>
next prev parent reply other threads:[~2019-09-18 13:29 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-10 11:45 [PATCH v2 0/3] dmaengine: bindings/edma: dma-channel-mask to array Peter Ujfalusi
2019-09-10 11:45 ` [PATCH v2 1/3] dt-bindings: dmaengine: dma-common: Change dma-channel-mask to uint32-array Peter Ujfalusi
2019-09-18 13:28 ` Rob Herring
2019-09-18 14:04 ` Peter Ujfalusi
2019-09-18 14:21 ` Rob Herring
2019-09-19 8:42 ` Peter Ujfalusi
2019-09-10 11:45 ` [PATCH v2 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA Peter Ujfalusi
2019-09-18 13:29 ` Rob Herring [this message]
2019-09-18 14:06 ` Peter Ujfalusi
2019-09-10 11:45 ` [PATCH v2 3/3] dmaengine: ti: edma: Add support for handling reserved channels Peter Ujfalusi
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