lkml.org 
[lkml]   [2022]   [Mar]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 1/3] dt-bindings: mmc: mmci: add a property to disable DMA LLI
Date
On STMicroelectronics variant of PL18x, the DMA Linked Lists are supported
starting from revision v2 of the peripheral. But it has limitations,
as all the buffers should be aligned on block size (except the last one).
But this cannot be guaranteed with SDIO. We should then have a property
to disable the support of LLI.

Signed-off-by: Yann Gautier <yann.gautier@foss.st.com>
---
Documentation/devicetree/bindings/mmc/arm,pl18x.yaml | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml b/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml
index 1e69a5a42439..309a2c0426e5 100644
--- a/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml
+++ b/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml
@@ -145,6 +145,11 @@ properties:
driver to sample the receive data (for example with a voltage switch
transceiver).

+ st,disable-dma-lli:
+ $ref: /schemas/types.yaml#/definitions/flag
+ description: ST Micro-specific property, disable DMA linked lists.
+ It is used for SDIO.
+
st,cmd-gpios:
maxItems: 1
description:
--
2.25.1
\
 
 \ /
  Last update: 2022-03-04 14:53    [W:0.143 / U:0.444 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site