[PATCH 4/4] ARM: dts: imx6q-logicpd: Use GPIO chipselect

Fabio Estevam festevam at gmail.com
Sun Sep 13 12:29:13 EDT 2020


Using the native SPI chipselect on i.MX6 is known to be problematic.

Doing it on a imx6q-sabresd causes the SPI NOR probe to fail:

[    5.388704] spi-nor spi0.0: unrecognized JEDEC id bytes: 00 00 00 00 00 00

Use the GPIO chipselect to avoid such problem.

Signed-off-by: Fabio Estevam <festevam at gmail.com>
---
 arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
index 9e027b9a5f91..665d63765cdc 100644
--- a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
+++ b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
@@ -212,6 +212,7 @@
 &ecspi1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_ecspi1>;
+	cs-gpios = <&gpio4 9 GPIO_ACTIVE_LOW>;
 	status = "disabled";
 };
 
@@ -383,7 +384,7 @@
 			MX6QDL_PAD_KEY_COL0__ECSPI1_SCLK	0x100b1
 			MX6QDL_PAD_KEY_ROW0__ECSPI1_MOSI	0x100b1
 			MX6QDL_PAD_KEY_COL1__ECSPI1_MISO	0x100b1
-			MX6QDL_PAD_KEY_ROW1__ECSPI1_SS0		0x100b1
+			MX6QDL_PAD_KEY_ROW1__GPIO4_IO09		0x1b0b0
 		>;
 	};
 
-- 
2.17.1




More information about the linux-arm-kernel mailing list