[PATCH 5.14 076/151] ARM: dts: imx: change the spi-nor tx

Greg Kroah-Hartman
2021-10-11T14:10:37Z

From: Haibo Chen <haibo.chen@nxp.com>

[ Upstream commit b2a4f4a302b83976ad0d2930abe0f38e6119a144 ]

Before commit 0e30f47232ab5 ("mtd: spi-nor: add support for DTR protocol"),
for all PP command, it only support 1-1-1 mode, no matter the tx setting
in dts. But after the upper commit, the logic change. It will choose
the best mode(fastest mode) which flash device and spi-nor host controller
both support.

Though the spi-nor device on imx6sx-sdb/imx6ul(l/z)-14x14-evk board
do not support PP-1-4-4/PP-1-1-4, but if tx is 4 in dts file, it will also
impact the read mode selection. For the spi-nor device on the upper mentioned
boards, they support read 1-4-4 mode and read 1-1-4 mode according to the
device internal sfdp register. But qspi host controller do not support
read 1-4-4 mode. so need to set the tx to 1, let the common code finally
select read 1-1-4 mode, PP-1-1-1 mode.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Fixes: 0e30f47232ab ("mtd: spi-nor: add support for DTR protocol")
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/arm/boot/dts/imx6sx-sdb.dts | 4 ++--
arch/arm/boot/dts/imx6ul-14x14-evk.dtsi | 2 +-
2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/boot/dts/imx6sx-sdb.dts b/arch/arm/boot/dts/imx6sx-sdb.dts
index 5a63ca615722..99f4cf777a38 100644
--- a/arch/arm/boot/dts/imx6sx-sdb.dts
+++ b/arch/arm/boot/dts/imx6sx-sdb.dts
@@ -114,7 +114,7 @@
compatible = "micron,n25q256a", "jedec,spi-nor";
spi-max-frequency = <29000000>;
spi-rx-bus-width = <4>;
- spi-tx-bus-width = <4>;
+ spi-tx-bus-width = <1>;
reg = <0>;
};

@@ -124,7 +124,7 @@
compatible = "micron,n25q256a", "jedec,spi-nor";
spi-max-frequency = <29000000>;
spi-rx-bus-width = <4>;
- spi-tx-bus-width = <4>;
+ spi-tx-bus-width = <1>;
reg = <2>;
};
};
diff --git a/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi b/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi
index 779cc536566d..a3fde3316c73 100644
--- a/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi
+++ b/arch/arm/boot/dts/imx6ul-14x14-evk.dtsi
@@ -292,7 +292,7 @@
compatible = "micron,n25q256a", "jedec,spi-nor";
spi-max-frequency = <29000000>;
spi-rx-bus-width = <4>;
- spi-tx-bus-width = <4>;
+ spi-tx-bus-width = <1>;
reg = <0>;
};
};
--
2.33.0