linux-kernel - [PATCH 1/1] ARM: dts: stm32: Configure qspi's mdma transfer to block for stm32mp151

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Date:   Mon, 26 Apr 2021 12:45:36 +0200
From:   <patrice.chotard@...s.st.com>
To:     <robh+dt@...nel.org>, <mark.rutland@....com>,
        <alexandre.torgue@...s.st.com>
CC:     <mcoquelin.stm32@...il.com>,
        <linux-stm32@...md-mailman.stormreply.com>,
        <linux@...linux.org.uk>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        Patrice Chotard <patrice.chotard@...s.st.com>,
        Christophe Kerello <christophe.kerello@...s.st.com>
Subject: [PATCH 1/1] ARM: dts: stm32: Configure qspi's mdma transfer to block for stm32mp151

From: Patrice Chotard <patrice.chotard@...s.st.com>

Configure qspi's mdma from buffer transfer (max 128 bytes) to
block transfer (max 64K bytes).

mtd_speedtest shows that write throughtput increases :
  - from 734 to 782 KiB/s (~6.5%) with s25fl512s SPI-NOR.
  - from 4848 to 5319 KiB/s (~9.72%) with Micron SPI-NAND.

Signed-off-by: Christophe Kerello <christophe.kerello@...s.st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@...s.st.com>
---
 arch/arm/boot/dts/stm32mp151.dtsi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/arm/boot/dts/stm32mp151.dtsi b/arch/arm/boot/dts/stm32mp151.dtsi
index 4b8031782555..cb326c1e12bc 100644
--- a/arch/arm/boot/dts/stm32mp151.dtsi
+++ b/arch/arm/boot/dts/stm32mp151.dtsi
@@ -1358,8 +1358,8 @@
 			reg = <0x58003000 0x1000>, <0x70000000 0x10000000>;
 			reg-names = "qspi", "qspi_mm";
 			interrupts = <GIC_SPI 92 IRQ_TYPE_LEVEL_HIGH>;
-			dmas = <&mdma1 22 0x2 0x100002 0x0 0x0>,
-			       <&mdma1 22 0x2 0x100008 0x0 0x0>;
+			dmas = <&mdma1 22 0x2 0x10100002 0x0 0x0>,
+			       <&mdma1 22 0x2 0x10100008 0x0 0x0>;
 			dma-names = "tx", "rx";
 			clocks = <&rcc QSPI_K>;
 			resets = <&rcc QSPI_R>;
-- 
2.17.1