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 v4 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA
Date: Mon, 30 Sep 2019 14:40:54 +0300 [thread overview]
Message-ID: <20190930114055.29315-3-peter.ujfalusi@ti.com> (raw)
In-Reply-To: <20190930114055.29315-1-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 | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/Documentation/devicetree/bindings/dma/ti-edma.txt b/Documentation/devicetree/bindings/dma/ti-edma.txt
index 4bbc94d829c8..0e1398f93aa2 100644
--- a/Documentation/devicetree/bindings/dma/ti-edma.txt
+++ b/Documentation/devicetree/bindings/dma/ti-edma.txt
@@ -42,6 +42,11 @@ 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.
+ Single uint32 for EDMA with 32 channels, array of two uint32 for
+ EDMA with 64 channels. See example and
+ Documentation/devicetree/bindings/dma/dma-common.yaml
+
------------------------------------------------------------------------------
eDMA3 Transfer Controller
@@ -91,6 +96,9 @@ 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:[~2019-09-30 11:40 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-30 11:40 [PATCH v4 0/3] dmaengine: bindings/edma: dma-channel-mask to array Peter Ujfalusi
2019-09-30 11:40 ` [PATCH v4 1/3] dt-bindings: dmaengine: dma-common: Change dma-channel-mask to uint32-array Peter Ujfalusi
2019-10-01 13:40 ` Rob Herring
2019-09-30 11:40 ` Peter Ujfalusi [this message]
2019-10-01 13:40 ` [PATCH v4 2/3] dt-bindings: dma: ti-edma: Document dma-channel-mask for EDMA Rob Herring
2019-09-30 11:40 ` [PATCH v4 3/3] dmaengine: ti: edma: Add support for handling reserved channels Peter Ujfalusi
2019-11-05 16:51 ` [PATCH v4 0/3] dmaengine: bindings/edma: dma-channel-mask to array Vinod Koul
2019-11-06 7:45 ` Peter Ujfalusi
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