2022-12-02 20:05:29

by Adam Ford

Subject: [PATCH] arm64: dts: imx8mm-beacon: Fix ecspi2 pinmux

Early hardware did not support hardware handshaking on the UART, but
final production hardware did. When the hardware was updated the chip
select was changed to facilitate hardware handshaking on UART3. Fix the
ecspi2 pin mux to eliminate a pin conflict with UART3 and allow the
EEPROM to operate again.

Fixes: 4ce01ce36d77 ("arm64: dts: imx8mm-beacon: Enable RTS-CTS on UART3")
Signed-off-by: Adam Ford <[email protected]>

diff --git a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
index 03266bd90a06..169f047fbca5 100644
--- a/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8mm-beacon-baseboard.dtsi
@@ -120,7 +120,7 @@ &csi {
&ecspi2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_espi2>;
- cs-gpios = <&gpio5 9 GPIO_ACTIVE_LOW>;
+ cs-gpios = <&gpio5 13 GPIO_ACTIVE_LOW>;
status = "okay";

eeprom@0 {
@@ -316,7 +316,7 @@ pinctrl_espi2: espi2grp {
MX8MM_IOMUXC_ECSPI2_SCLK_ECSPI2_SCLK 0x82
MX8MM_IOMUXC_ECSPI2_MOSI_ECSPI2_MOSI 0x82
MX8MM_IOMUXC_ECSPI2_MISO_ECSPI2_MISO 0x82
- MX8MM_IOMUXC_ECSPI1_SS0_GPIO5_IO9 0x41
+ MX8MM_IOMUXC_ECSPI2_SS0_GPIO5_IO13 0x41
>;
};

--
2.34.1

2022-12-31 13:00:33

by Shawn Guo

Subject: Re: [PATCH] arm64: dts: imx8mm-beacon: Fix ecspi2 pinmux

On Fri, Dec 02, 2022 at 01:10:37PM -0600, Adam Ford wrote:
> Early hardware did not support hardware handshaking on the UART, but
> final production hardware did. When the hardware was updated the chip
> select was changed to facilitate hardware handshaking on UART3. Fix the
> ecspi2 pin mux to eliminate a pin conflict with UART3 and allow the
> EEPROM to operate again.
>
> Fixes: 4ce01ce36d77 ("arm64: dts: imx8mm-beacon: Enable RTS-CTS on UART3")
> Signed-off-by: Adam Ford <[email protected]>

Applied, thanks!