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arm64: dts: imx8mm: Correct WDOG_B pin configuration

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Different revision of i.MX8MM EVK boards may have different external
pull up registor design, some are enabled while some are NOT, to make
sure the WDOG_B pin works properly, better to enable internal pull up
resistor. Since enabling internal pull up resistor is NOT harmful and
having benefit of flexibility on different board design, just enable
it for all i.MX8MM boards; And schmitt input is NOT necessary for this
WDOG_B output pin, so remove it; Open drain outputs provide more
flexibility to a designer as they can be pulled-up to any voltage found
in the system, so enable it as well.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Reviewed-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
This commit is contained in:
Anson Huang
2020-10-12 20:44:00 +08:00
committed by Shawn Guo
parent 582b6d8b25
commit b781820927
3 changed files with 3 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/arm64/boot/dts/freescale/imx8mm-beacon-som.dtsi
View File

@@ -437,7 +437,7 @@ MX8MM_IOMUXC_NAND_CE1_B_USDHC3_STROBE 0x196
pinctrl_wdog: wdoggrp {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0xc6
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0x166
>;
};

2
arch/arm64/boot/dts/freescale/imx8mm-evk.dtsi
View File

@@ -468,7 +468,7 @@ MX8MM_IOMUXC_GPIO1_IO04_USDHC2_VSELECT 0x1d0
pinctrl_wdog: wdoggrp {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0xc6
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0x166
>;
};
};

2
arch/arm64/boot/dts/freescale/imx8mm-var-som.dtsi
View File

@@ -555,7 +555,7 @@ MX8MM_IOMUXC_NAND_CE1_B_USDHC3_STROBE 0x196
pinctrl_wdog: wdoggrp {
fsl,pins = <
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0xc6
MX8MM_IOMUXC_GPIO1_IO02_WDOG1_WDOG_B 0x166
>;
};
};