From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Christian=20Br=C3=A4uner=20S=C3=B8rensen?= Date: Fri, 19 Feb 2021 08:23:58 +0100 Subject: [PATCH] arm: dts: imx7d-sdb: Fix enet by setting soft spi mode to 3 for extended io Message-ID: <20210219072358.20157-1-yocto@bsorensen.net> List-Id: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: u-boot@lists.denx.de This patch sets SPI MODE 3 for the fairchild 74HC595 device that is used to reset the ethernet device, which fixes ethernet. Reasoning: The imx7dsabresd board uses SPI for setting the extended IO. One of the purposes of this extended IO, is having the ability to set ENET_RST i.e. reset the ethernet PHY. Without proper reset of the PHY, ethernet does not work. commit 0e146993bb3d ("spi: add support for all spi modes with soft spi") broke network support for boards using imx7d-sdb, since it actually corrected default SPI mode setting for the software emulated soft_spi to 0, i.e. CPHA to 0 and CPOL to 0. Previously, the driver defaulted to CPHA 1 and CPOL 1 (i.e. spi mode 3). After the default SPI mode is now 0 (which is the correct default value) we now need to actively set CPHA and CPOL to 1 for the specific devices that actually needs this. Signed-off-by: Christian Br?uner S?rensen --- arch/arm/dts/imx7d-sdb.dts | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm/dts/imx7d-sdb.dts b/arch/arm/dts/imx7d-sdb.dts index 8191ac7c33..6ed21ce8b0 100644 --- a/arch/arm/dts/imx7d-sdb.dts +++ b/arch/arm/dts/imx7d-sdb.dts @@ -58,6 +58,8 @@ reg = <0>; registers-number = <1>; spi-max-frequency = <100000>; + spi-cpha; + spi-cpol; }; }; -- 2.25.1