linux-kernel - [PATCH v7 01/13] Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core"

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Message-Id: <1583944596-23410-2-git-send-email-yibin.gong@nxp.com>
Date:   Thu, 12 Mar 2020 00:36:24 +0800
From:   Robin Gong <yibin.gong@....com>
To:     s.hauer@...gutronix.de, vkoul@...nel.org, shawnguo@...nel.org,
        u.kleine-koenig@...gutronix.de, broonie@...nel.org,
        robh+dt@...nel.org, festevam@...il.com, dan.j.williams@...el.com,
        mark.rutland@....com, catalin.marinas@....com, will.deacon@....com,
        l.stach@...gutronix.de, martin.fuzzey@...wbird.group
Cc:     kernel@...gutronix.de, linux-spi@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-imx@....com, dmaengine@...r.kernel.org,
        devicetree@...r.kernel.org
Subject: [PATCH v7 01/13] Revert "ARM: dts: imx6q: Use correct SDMA script for SPI5 core"

  There are two ways for SDMA accessing SPBA devices: one is SDMA->AIPS
->SPBA(masterA port), another is SDMA->SPBA(masterC port). Please refer
to the 'Figure 58-1. i.MX 6Dual/6Quad SPBA connectivity' of i.mx6DQ
Reference Manual. SDMA provide the corresponding app_2_mcu/mcu_2_app and
shp_2_mcu/mcu_2_shp script for such two options. So both AIPS and SPBA
scripts should keep the same behaviour, the issue only caught in AIPS
script sounds not solide.
  The issue is more likely as the ecspi errata
ERR009165(http://www.nxp.com/docs/en/errata/IMX6DQCE.pdf):
eCSPI: TXFIFO empty flag glitch can cause the current FIFO transfer to
       be sent twice
So revert commit 'df07101e1c4a' firstly.

Signed-off-by: Robin Gong <yibin.gong@....com>
---
 arch/arm/boot/dts/imx6q.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
index 0fad13f..81f693e 100644
--- a/arch/arm/boot/dts/imx6q.dtsi
+++ b/arch/arm/boot/dts/imx6q.dtsi
@@ -175,7 +175,7 @@
 					clocks = <&clks IMX6Q_CLK_ECSPI5>,
 						 <&clks IMX6Q_CLK_ECSPI5>;
 					clock-names = "ipg", "per";
-					dmas = <&sdma 11 8 1>, <&sdma 12 8 2>;
+					dmas = <&sdma 11 7 1>, <&sdma 12 7 2>;
 					dma-names = "rx", "tx";
 					status = "disabled";
 				};
-- 
2.7.4