From: Yann Gautier <yann.gautier@foss.st.com>
To: Rob Herring <robh+dt@kernel.org>, Ulf Hansson <ulf.hansson@linaro.org>
Cc: <devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>, <linux-mmc@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Christophe Kerello <christophe.kerello@foss.st.com>,
Linus Walleij <linus.walleij@linaro.org>,
Ludovic Barre <ludovic.barre@foss.st.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Philipp Zabel <p.zabel@pengutronix.de>,
Russell King <linux@armlinux.org.uk>, Marek Vasut <marex@denx.de>,
<kernel@dh-electronics.com>,
Manivannan Sadhasivam <mani@kernel.org>,
Grzegorz Szymaszek <gszymaszek@short.pl>,
Yann Gautier <yann.gautier@foss.st.com>
Subject: [PATCH 1/3] dt-bindings: mmc: mmci: add a property to disable DMA LLI
Date: Fri, 4 Mar 2022 14:51:32 +0100 [thread overview]
Message-ID: <20220304135134.47827-2-yann.gautier@foss.st.com> (raw)
In-Reply-To: <20220304135134.47827-1-yann.gautier@foss.st.com>
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
next prev parent reply other threads:[~2022-03-04 13:52 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-04 13:51 [PATCH 0/3] mmc: mmci: stm32: updates for SDIO Yann Gautier
2022-03-04 13:51 ` Yann Gautier [this message]
2022-03-08 10:57 ` [PATCH 1/3] dt-bindings: mmc: mmci: add a property to disable DMA LLI Ulf Hansson
2022-03-10 15:59 ` Yann Gautier
2022-03-11 15:45 ` Ulf Hansson
2022-03-14 22:43 ` Linus Walleij
2022-03-15 8:26 ` Yann Gautier
2022-03-17 10:00 ` Ulf Hansson
2022-03-17 10:17 ` Yann Gautier
2022-03-17 10:28 ` Ulf Hansson
2022-03-25 20:12 ` Linus Walleij
2022-03-28 14:58 ` Yann Gautier
2022-03-29 15:31 ` Manivannan Sadhasivam
2022-03-29 16:00 ` Yann Gautier
2022-03-29 17:33 ` Manivannan Sadhasivam
2022-03-29 21:16 ` Linus Walleij
2022-03-30 10:25 ` Srinivas Kandagatla
2022-03-04 13:51 ` [PATCH 2/3] mmc: mmci: stm32: manage st,disable-dma-lli property Yann Gautier
2022-03-04 13:51 ` [PATCH 3/3] mmc: mmci: manage MMC_PM_KEEP_POWER per variant config Yann Gautier
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