Hi All, On Mon, 22 Jul 2019 at 12:51, Neil Armstrong <narmstr...@baylibre.com> wrote: > > On 19/07/2019 21:29, Xavier Ruppen wrote: > > When powering off the Odroid N2, the tflash_vdd regulator is > > automatically turned off by the kernel. This is a problem > > when issuing the "reboot" command while using an SD card. > > The boot ROM does not power this regulator back on, blocking > > the reboot process at the boot ROM stage, preventing the > > SD card from being detected. > > > > Adding the "regulator-always-on" property fixes the problem. > > > > Signed-off-by: Xavier Ruppen <xrup...@gmail.com> > > --- > > > > Here is what the boot ROM output looks like without this patch: > > > > [root@alarm ~]# reboot > > [...] > > [ 24.275860] shutdown[1]: All loop devices detached. > > [ 24.278864] shutdown[1]: Detaching DM devices. > > [ 24.287105] kvm: exiting hardware virtualization > > [ 24.318776] reboot: Restarting system > > bl31 reboot reason: 0xd > > bl31 reboot reason: 0x0 > > system cmd 1. > > G12B:BL:6e7c85:7898ac;FEAT:E0F83180:2000;POC:F;RCY:0; > > EMMC:800;NAND:81;SD?:0;SD:400;USB:8;LOOP:1;EMMC:800; > > NAND:81;SD?:0;SD:400;USB:8;LOOP:2;EMMC:800;NAND:81; > > SD?:0;SD:400;USB:8;LOOP:3; [...] > > > > Other people can be seen having this problem on the odroid > > forum [1]. > > > > The cause of the problem was found by Martin Blumenstingl > > on #linux-amlogic. We may want to add his Suggested-by tag > > if he agrees. > > > > [1] https://forum.odroid.com/viewtopic.php?f=176&t=33993 > > > > arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts | 1 + > > 1 file changed, 1 insertion(+) > > > > diff --git a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > > b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > > index 81780ffcc7f0..4e916e1f71f7 100644 > > --- a/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > > +++ b/arch/arm64/boot/dts/amlogic/meson-g12b-odroid-n2.dts > > @@ -53,6 +53,7 @@ > > > > gpio = <&gpio_ao GPIOAO_8 GPIO_ACTIVE_HIGH>; > > enable-active-high; > > + regulator-always-on; > > }; > > > > tf_io: gpio-regulator-tf_io { > > > > Surely solves the situation, thanks ! > > please add a comment on top of "regulator-always-on" to explain why we always > enable it, > note we should always enable it in case of watchdog reboot or other > uncontrolled reset, > this regulator must never be disabled. > > Reviewed-by: Neil Armstrong <narmstr...@baylibre.com> > > Thanks, > Neil >
I am afraid this did not fix the issue I was also facing with Archlinux on Odroid N2 using mainline u-boot. Here is the log of at my end using latest mainline u-boot with Neil's patches. [0] https://pastebin.com/HNmeY5uF Well this issue also persist with eMMC not getting detected after reboot If I try to change the dts to fix the sdcard. I am checking this should we enable regulator-boot-on option but still no luck. Best Regards -Anand
