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https://github.com/u-boot/u-boot.git
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d7882f556e
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>
77 lines
1.2 KiB
Text
77 lines
1.2 KiB
Text
// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (C) 2019 Levin Du <djw@t-chip.com.cn>
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*/
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#include "rk3399-u-boot.dtsi"
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#include "rk3399-sdram-lpddr4-100.dtsi"
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/ {
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config {
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sysreset-gpio = <&gpio1 RK_PA6 GPIO_ACTIVE_HIGH>;
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};
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vcc_hub_en: vcc_hub_en-regulator {
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compatible = "regulator-fixed";
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enable-active-high;
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gpio = <&gpio2 RK_PA4 GPIO_ACTIVE_HIGH>;
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pinctrl-names = "default";
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pinctrl-0 = <&hub_rst>;
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regulator-name = "vcc_hub_en";
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regulator-always-on;
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};
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};
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/*
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* should be placed inside mp8859, but not until mp8859 has
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* its own dt-binding.
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*/
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&dc_12v {
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compatible = "regulator-fixed";
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regulator-name = "dc_12v";
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regulator-always-on;
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regulator-boot-on;
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regulator-min-microvolt = <12000000>;
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regulator-max-microvolt = <12000000>;
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vin-supply = <&vcc_vbus_typec0>;
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};
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&gpio4 {
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bootph-pre-ram;
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};
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&gpio1 {
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bootph-pre-ram;
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};
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&spi1 {
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flash@0 {
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bootph-pre-ram;
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bootph-some-ram;
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};
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};
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&vcc3v0_sd {
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bootph-pre-ram;
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};
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&vcc3v0_sd_en {
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bootph-pre-ram;
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};
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&vcc5v0_host {
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regulator-always-on;
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};
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&vcc_sdio {
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regulator-always-on;
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};
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&vcc_sys {
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regulator-always-on;
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};
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&vdd_log {
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regulator-min-microvolt = <430000>;
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regulator-init-microvolt = <950000>;
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};
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