smallsolar/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

rockchip: rk3399-roc-pc: Hook sysreset gpio to enable full reset

Browse Source 
The reset mechanism used by Linux to reset the SoC is known to only
partially reset the logic. A mechanism is implemented in
rk3399_force_power_on_reset to use a GPIO connected to the PMIC's
over-temperature (OTP) reset pin, which fully resets all logic.

Hook the associated GPIO where the function expects it to enable this
reset mechanism and avoid any possible side-effect of partially-reset
units.

Without this patch, reading from the micro sd slot fails after a reset.
With this mechanism, U-Boot is able to boot from it reliably.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
This commit is contained in:
Paul Kocialkowski
2024-09-26 20:31:08 +02:00
committed by Tom Rini
parent c990398674
commit d7882f556e
1 changed files with 8 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
arch/arm/dts/rk3399-roc-pc-u-boot.dtsi
View File

@@ -7,6 +7,10 @@
#include "rk3399-sdram-lpddr4-100.dtsi"
/ {
config {
sysreset-gpio = <&gpio1 RK_PA6 GPIO_ACTIVE_HIGH>;
};
vcc_hub_en: vcc_hub_en-regulator {
compatible = "regulator-fixed";
enable-active-high;
@@ -36,6 +40,10 @@
bootph-pre-ram;
};
&gpio1 {
bootph-pre-ram;
};
&spi1 {
flash@0 {
bootph-pre-ram;