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From: Peter Ujfalusi <peter.ujfalusi@ti.com>
To: <vkoul@kernel.org>, <robh+dt@kernel.org>
Cc: <dmaengine@vger.kernel.org>, <linux-kernel@vger.kernel.org>,
	<dan.j.williams@intel.com>, <devicetree@vger.kernel.org>
Subject: [PATCH v2 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA
Date: Tue, 10 Sep 2019 14:45:58 +0300
Message-ID: <20190910114559.22810-3-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <20190910114559.22810-1-peter.ujfalusi@ti.com>

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
+
 
 ------------------------------------------------------------------------------
 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


  parent reply index

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 ` Peter Ujfalusi [this message]
2019-09-18 13:29   ` [PATCH v2 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA Rob Herring
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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