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ARM: dts: bugfix tqma7 soft reset issue 

Running reboot command on the TQMa7 board would just hang infinite
at the end of the system shutdown process.

Handling of i.MX7 errata e10574:
Watchdog: A watchdog timeout or software trigger will not reset the SOC.

Moved pinctrl from common mba7 to common tqma7 dtsi as it improves
readability of errata handling. Most integrators of this SoM will
likely use the development board as inspiration for handling this
SoC issue.

Signed-off-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
hifive-unleashed-5.2
Bruno Thomsen 2019-04-16 11:08:05 +02:00 committed by Shawn Guo
parent 716be61d18
commit 5ea0c200bd
2 changed files with 17 additions and 11 deletions
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11
arch/arm/boot/dts/imx7-mba7.dtsi
View File

@ -472,12 +472,6 @@
MX7D_PAD_LPSR_GPIO1_IO05__GPIO1_IO5 0x59
>;
};
pinctrl_wdog1: wdog1grp {
fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO00__WDOG1_WDOG_B 0x30
>;
};
};
&pwm1 {
@ -554,8 +548,3 @@
no-1-8-v;
status = "okay";
};
&wdog1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_wdog1>;
};

17
arch/arm/boot/dts/imx7-tqma7.dtsi
View File

@ -209,6 +209,14 @@
};
};
&iomuxc_lpsr {
pinctrl_wdog1: wdog1grp {
fsl,pins = <
MX7D_PAD_LPSR_GPIO1_IO00__WDOG1_WDOG_B 0x30
>;
};
};
&sdma {
status = "okay";
};
@ -228,5 +236,14 @@
};
&wdog1 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_wdog1>;
/*
* Errata e10574:
* WDOG reset needs to run with WDOG_RESET_B signal enabled.
* X1-51 (WDOG1#) signal needs carrier board handling to reset
* TQMa7 on X1-22 (RESET_IN#).
*/
fsl,ext-reset-output;
status = "okay";
};