From: Serge Semin <Sergey.Semin@baikalelectronics.ru>
To: Vinod Koul <vkoul@kernel.org>, Viresh Kumar <vireshk@kernel.org>,
Rob Herring <robh+dt@kernel.org>
Cc: Serge Semin <Sergey.Semin@baikalelectronics.ru>,
Serge Semin <fancer.lancer@gmail.com>,
Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
Arnd Bergmann <arnd@arndb.de>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
<linux-mips@vger.kernel.org>, <dmaengine@vger.kernel.org>,
<devicetree@vger.kernel.org>, <linux-kernel@vger.kernel.org>
Subject: [PATCH v5 02/11] dt-bindings: dma: dw: Add max burst transaction length property
Date: Fri, 29 May 2020 17:40:45 +0300 [thread overview]
Message-ID: <20200529144054.4251-3-Sergey.Semin@baikalelectronics.ru> (raw)
In-Reply-To: <20200529144054.4251-1-Sergey.Semin@baikalelectronics.ru>
This array property is used to indicate the maximum burst transaction
length supported by each DMA channel.
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: linux-mips@vger.kernel.org
---
Changelog v2:
- Rearrange SoBs.
- Move $ref to the root level of the properties. So do with the
constraints.
- Set default max-burst-len to 256 TR-WIDTH words.
Changelog v3:
- Add more details into the property description about what limitations
snps,max-burst-len defines.
---
.../bindings/dma/snps,dma-spear1340.yaml | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
index e7611840a7cf..20870f5c14dd 100644
--- a/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
+++ b/Documentation/devicetree/bindings/dma/snps,dma-spear1340.yaml
@@ -120,6 +120,21 @@ properties:
enum: [0, 1]
default: 1
+ snps,max-burst-len:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ description: |
+ Maximum length of the burst transactions supported by the controller.
+ This property defines the upper limit of the run-time burst setting
+ (CTLx.SRC_MSIZE/CTLx.DST_MSIZE fields) so the allowed burst length
+ will be from 1 to max-burst-len words. It's an array property with one
+ cell per channel in the units determined by the value set in the
+ CTLx.SRC_TR_WIDTH/CTLx.DST_TR_WIDTH fields (data width).
+ items:
+ maxItems: 8
+ items:
+ enum: [4, 8, 16, 32, 64, 128, 256]
+ default: 256
+
snps,dma-protection-control:
$ref: /schemas/types.yaml#definitions/uint32
description: |
--
2.26.2
next prev parent reply other threads:[~2020-05-29 14:41 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-29 14:40 [PATCH v5 00/11] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Serge Semin
2020-05-29 14:40 ` [PATCH v5 01/11] dt-bindings: dma: dw: Convert DW DMAC to DT binding Serge Semin
2020-06-01 4:20 ` Viresh Kumar
2020-05-29 14:40 ` Serge Semin [this message]
2020-05-29 21:24 ` [PATCH v5 02/11] dt-bindings: dma: dw: Add max burst transaction length property Rob Herring
2020-06-01 4:21 ` Viresh Kumar
2020-05-29 14:40 ` [PATCH v5 03/11] dmaengine: Introduce min burst length capability Serge Semin
2020-05-29 14:40 ` [PATCH v5 04/11] dmaengine: Introduce max SG list entries capability Serge Semin
2020-05-29 14:40 ` [PATCH v5 05/11] dmaengine: Introduce DMA-device device_caps callback Serge Semin
2020-05-29 14:40 ` [PATCH v5 06/11] dmaengine: dw: Take HC_LLP flag into account for noLLP auto-config Serge Semin
2020-05-29 14:40 ` [PATCH v5 07/11] dmaengine: dw: Set DMA device max segment size parameter Serge Semin
2020-05-29 14:40 ` [PATCH v5 08/11] dmaengine: dw: Add dummy device_caps callback Serge Semin
2020-05-29 14:40 ` [PATCH v5 09/11] dmaengine: dw: Initialize min and max burst DMA device capability Serge Semin
2020-05-29 15:48 ` Andy Shevchenko
2020-05-29 14:40 ` [PATCH v5 10/11] dmaengine: dw: Introduce max burst length hw config Serge Semin
2020-05-29 14:40 ` [PATCH v5 11/11] dmaengine: dw: Initialize max_sg_nents capability Serge Semin
2020-06-02 9:27 ` [PATCH v5 00/11] dmaengine: dw: Take Baikal-T1 SoC DW DMAC peculiarities into account Serge Semin
2020-06-16 16:32 ` Vinod Koul
2020-06-16 19:07 ` Serge Semin
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