[PATCH 2/2] riscv: dts: spacemit: mark K1 board boot devices bootph-pre-ram

From: Hung-Chun Tseng

Date: Mon Oct 12 2026 - 19:56:56 EST

On K1 boards an SPL reads the board EEPROM (0x50 on i2c2) to identify
the board, and before DRAM training it programs the P1 PMIC (0x41 on
i2c8) rails buck1, buck3 and aldo1. Boards that boot from SPI NOR also
need the flash on QSPI.

Mark these board peripherals, and the I2C buses they sit on,
bootph-pre-ram on the boards that have them.

Assisted-by: claude-opus-5-5 dtbs_check
Signed-off-by: Hung-Chun Tseng <alan.tseng.cs@xxxxxxxxx>
---
arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi | 7 +++++++
arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 7 +++++++
arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 8 ++++++++
arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 8 ++++++++
arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts | 5 +++++
arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 6 ++++++
6 files changed, 41 insertions(+)

diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
index 81c40df2a..6269d2ba7 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
@@ -64,6 +64,7 @@ &pdma {
};

&i2c2 {
+ bootph-pre-ram;
pinctrl-names = "default";
pinctrl-0 = <&i2c2_0_cfg>;
status = "okay";
@@ -71,6 +72,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>;
pagesize = <16>;
read-only;
@@ -93,6 +95,7 @@ serial-number {
};

&i2c8 {
+ bootph-pre-ram;
pinctrl-names = "default";
pinctrl-0 = <&i2c8_cfg>;
status = "okay";
@@ -100,6 +103,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&reg_vcc_4v>;
vin2-supply = <&reg_vcc_4v>;
@@ -113,6 +117,7 @@ pmic@41 {

regulators {
buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -127,6 +132,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -155,6 +161,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
index 58035d886..e74505984 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -187,6 +187,7 @@ &qspi {
};

&i2c2 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c2_0_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -194,6 +195,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
pagesize = <16>;
read-only;
@@ -216,6 +218,7 @@ serial-number {
};

&i2c8 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c8_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -223,6 +226,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&reg_vcc_4v>;
vin2-supply = <&reg_vcc_4v>;
@@ -236,6 +240,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -250,6 +255,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -278,6 +284,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
diff --git a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
index 635e95aad..406b7ca16 100644
--- a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
@@ -201,6 +201,7 @@ &pdma {
};

&i2c2 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c2_0_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -208,6 +209,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c04";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC18 */
pagesize = <16>;
read-only;
@@ -223,6 +225,7 @@ product-name {
};

&i2c8 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c8_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -230,6 +233,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&reg_vcc_4v>;
vin2-supply = <&reg_vcc_4v>;
@@ -243,6 +247,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -257,6 +262,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -285,6 +291,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -386,6 +393,7 @@ &qspi {
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
+ bootph-pre-ram;
spi-max-frequency = <26500000>;
spi-rx-bus-width = <4>;
spi-tx-bus-width = <4>;
diff --git a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
index 246f8f2ab..0531bd003 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -127,6 +127,7 @@ &pdma {
};

&i2c2 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c2_0_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -134,6 +135,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
pagesize = <8>;
read-only;
@@ -159,6 +161,7 @@ num-macs {
};

&i2c8 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c8_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -166,6 +169,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&reg_vcc_4v>;
vin2-supply = <&reg_vcc_4v>;
@@ -179,6 +183,7 @@ pmic@41 {

regulators {
buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -193,6 +198,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -221,6 +227,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -320,6 +327,7 @@ &qspi {
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
+ bootph-pre-ram;
spi-max-frequency = <26500000>;
spi-rx-bus-width = <4>;
spi-tx-bus-width = <4>;
diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
index 2d1ba34cb..8e9bbbeb1 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
@@ -113,6 +113,7 @@ rgmii1: phy@1 {
};

&i2c8 {
+ bootph-pre-ram;
pinctrl-names = "default";
pinctrl-0 = <&i2c8_cfg>;
status = "okay";
@@ -120,6 +121,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&vcc4v0>;
vin2-supply = <&vcc4v0>;
@@ -133,6 +135,7 @@ pmic@41 {

regulators {
buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -147,6 +150,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -175,6 +179,7 @@ buck6 {
};

aldo1_3v3: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
diff --git a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
index b907a1396..857b4ebe3 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -143,6 +143,7 @@ &pdma {
};

&i2c8 {
+ bootph-pre-ram;
pinctrl-names = "default";
pinctrl-0 = <&i2c8_cfg>;
status = "okay";
@@ -150,6 +151,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&vcc4v0>;
vin2-supply = <&vcc4v0>;
@@ -163,6 +165,7 @@ pmic@41 {

regulators {
buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -177,6 +180,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -205,6 +209,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -298,6 +303,7 @@ &qspi {
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
+ bootph-pre-ram;
spi-max-frequency = <26500000>;
spi-rx-bus-width = <4>;
spi-tx-bus-width = <4>;
--
2.43.0