From: Amelie Delaunay <amelie.delaunay@foss.st.com>
To: Vinod Koul <vkoul@kernel.org>, Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: <dmaengine@vger.kernel.org>,
<linux-stm32@st-md-mailman.stormreply.com>,
<devicetree@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<linux-kernel@vger.kernel.org>,
Amelie Delaunay <amelie.delaunay@foss.st.com>
Subject: [PATCH 09/11] arm64: dts: st: add DMA support on U(S)ART instances of stm32mp25
Date: Thu, 10 Oct 2024 16:27:59 +0200 [thread overview]
Message-ID: <20241010-dma3-mp25-updates-v1-9-adf0633981ea@foss.st.com> (raw)
In-Reply-To: <20241010-dma3-mp25-updates-v1-0-adf0633981ea@foss.st.com>
Add dmas and dma-names properties in u(s)art nodes of stm32mp251.dtsi to
enable DMA support.
RX channel requires to prevent pack/unpack feature of DMA to avoid losing
bytes when interrupting RX transfer, as it uses a cyclic buffer.
Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
---
arch/arm64/boot/dts/st/stm32mp251.dtsi | 27 +++++++++++++++++++++++++++
arch/arm64/boot/dts/st/stm32mp257f-ev1.dts | 2 ++
2 files changed, 29 insertions(+)
diff --git a/arch/arm64/boot/dts/st/stm32mp251.dtsi b/arch/arm64/boot/dts/st/stm32mp251.dtsi
index 443cc8d6ae8e9e2bff1bb862b0921d9626bb78e1..02fcb9fcff87ba9d5c1ecab0385e3a57cde31e2e 100644
--- a/arch/arm64/boot/dts/st/stm32mp251.dtsi
+++ b/arch/arm64/boot/dts/st/stm32mp251.dtsi
@@ -269,6 +269,9 @@ usart2: serial@400e0000 {
reg = <0x400e0000 0x400>;
interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_USART2>;
+ dmas = <&hpdma 11 0x20 0x10012>,
+ <&hpdma 12 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 32>;
status = "disabled";
};
@@ -278,6 +281,9 @@ usart3: serial@400f0000 {
reg = <0x400f0000 0x400>;
interrupts = <GIC_SPI 116 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_USART3>;
+ dmas = <&hpdma 13 0x20 0x10012>,
+ <&hpdma 14 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 33>;
status = "disabled";
};
@@ -287,6 +293,9 @@ uart4: serial@40100000 {
reg = <0x40100000 0x400>;
interrupts = <GIC_SPI 126 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_UART4>;
+ dmas = <&hpdma 15 0x20 0x10012>,
+ <&hpdma 16 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 34>;
status = "disabled";
};
@@ -296,6 +305,9 @@ uart5: serial@40110000 {
reg = <0x40110000 0x400>;
interrupts = <GIC_SPI 127 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_UART5>;
+ dmas = <&hpdma 17 0x20 0x10012>,
+ <&hpdma 18 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 35>;
status = "disabled";
};
@@ -396,6 +408,9 @@ usart6: serial@40220000 {
reg = <0x40220000 0x400>;
interrupts = <GIC_SPI 136 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_USART6>;
+ dmas = <&hpdma 19 0x20 0x10012>,
+ <&hpdma 20 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 36>;
status = "disabled";
};
@@ -441,6 +456,9 @@ uart9: serial@402c0000 {
reg = <0x402c0000 0x400>;
interrupts = <GIC_SPI 150 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_UART9>;
+ dmas = <&hpdma 25 0x20 0x10012>,
+ <&hpdma 26 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 39>;
status = "disabled";
};
@@ -450,6 +468,9 @@ usart1: serial@40330000 {
reg = <0x40330000 0x400>;
interrupts = <GIC_SPI 114 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_USART1>;
+ dmas = <&hpdma 9 0x20 0x10012>,
+ <&hpdma 10 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 31>;
status = "disabled";
};
@@ -483,6 +504,9 @@ uart7: serial@40370000 {
reg = <0x40370000 0x400>;
interrupts = <GIC_SPI 148 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_UART7>;
+ dmas = <&hpdma 21 0x20 0x10012>,
+ <&hpdma 22 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 37>;
status = "disabled";
};
@@ -492,6 +516,9 @@ uart8: serial@40380000 {
reg = <0x40380000 0x400>;
interrupts = <GIC_SPI 149 IRQ_TYPE_LEVEL_HIGH>;
clocks = <&rcc CK_KER_UART8>;
+ dmas = <&hpdma 23 0x20 0x10012>,
+ <&hpdma 24 0x20 0x3021>;
+ dma-names = "rx", "tx";
access-controllers = <&rifsc 38>;
status = "disabled";
};
diff --git a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
index 214191a8322b81e7ae453503863b4465d9b625e0..d468dcbe849680de812a0ddd593f30cbf507f645 100644
--- a/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
+++ b/arch/arm64/boot/dts/st/stm32mp257f-ev1.dts
@@ -157,6 +157,8 @@ &usart2 {
pinctrl-0 = <&usart2_pins_a>;
pinctrl-1 = <&usart2_idle_pins_a>;
pinctrl-2 = <&usart2_sleep_pins_a>;
+ /delete-property/dmas;
+ /delete-property/dma-names;
status = "okay";
};
--
2.25.1
next prev parent reply other threads:[~2024-10-10 14:31 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-10-10 14:27 [PATCH 00/11] STM32 DMA3 updates for STM32MP25 Amelie Delaunay
2024-10-10 14:27 ` [PATCH 01/11] dt-bindings: dma: stm32-dma3: prevent packing/unpacking mode Amelie Delaunay
2024-10-10 18:11 ` Rob Herring (Arm)
2024-10-10 14:27 ` [PATCH 02/11] dmaengine: stm32-dma3: prevent pack/unpack thanks to DT configuration Amelie Delaunay
2024-10-10 14:27 ` [PATCH 03/11] dmaengine: stm32-dma3: refactor HW linked-list to optimize memory accesses Amelie Delaunay
2024-10-10 14:27 ` [PATCH 04/11] dt-bindings: dma: stm32-dma3: prevent linked-list refactoring Amelie Delaunay
2024-10-10 18:14 ` Rob Herring
2024-10-11 9:01 ` Amelie Delaunay
2024-10-10 14:27 ` [PATCH 05/11] dmaengine: stm32-dma3: prevent LL refactoring thanks to DT configuration Amelie Delaunay
2024-10-10 14:27 ` [PATCH 06/11] dt-bindings: dma: stm32-dma3: introduce st,axi-max-burst-len property Amelie Delaunay
2024-10-10 18:16 ` Rob Herring
2024-10-11 9:12 ` Amelie Delaunay
2024-10-10 14:27 ` [PATCH 07/11] dmaengine: stm32-dma3: clamp AXI burst using st,axi-max-burst-len Amelie Delaunay
2024-10-10 14:27 ` [PATCH 08/11] arm64: dts: st: limit axi burst length in dma nodes of stm32mp25 Amelie Delaunay
2024-10-10 14:27 ` Amelie Delaunay [this message]
2024-10-10 14:28 ` [PATCH 10/11] arm64: dts: st: add DMA support on I2C instances " Amelie Delaunay
2024-10-10 14:28 ` [PATCH 11/11] arm64: dts: st: add DMA support on SPI " Amelie Delaunay
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20241010-dma3-mp25-updates-v1-9-adf0633981ea@foss.st.com \
--to=amelie.delaunay@foss.st.com \
--cc=alexandre.torgue@foss.st.com \
--cc=conor+dt@kernel.org \
--cc=devicetree@vger.kernel.org \
--cc=dmaengine@vger.kernel.org \
--cc=krzk+dt@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-stm32@st-md-mailman.stormreply.com \
--cc=mcoquelin.stm32@gmail.com \
--cc=robh@kernel.org \
--cc=vkoul@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).