[PATCH v2 2/2] riscv: dts: spacemit: mark K1 board boot devices bootph-pre-ram

From: Hung-Chun Tseng

Date: Sat Oct 17 2026 - 14:52:42 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 bootph-pre-ram on the boards that have
them, together with i2c2 where the EEPROM sits. i2c8 is tagged in
k1.dtsi, as every K1 board connects the PMIC there.

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 | 6 ++++++
arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 6 ++++++
arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 7 +++++++
arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 7 +++++++
arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts | 4 ++++
arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 5 +++++
6 files changed, 35 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..acb8fa2e6 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;
@@ -100,6 +102,7 @@ &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 +116,7 @@ pmic@41 {

regulators {
buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -127,6 +131,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -155,6 +160,7 @@ 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..b91db3204 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;
@@ -223,6 +225,7 @@ &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 +239,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -250,6 +254,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -278,6 +283,7 @@ 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..d2a39cf55 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;
@@ -230,6 +232,7 @@ &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 +246,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -257,6 +261,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -285,6 +290,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -386,6 +392,7 @@ &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 23f32a8a3..a3d0e38ac 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -160,6 +160,7 @@ &pdma {
};

&i2c2 {
+ bootph-pre-ram;
pinctrl-0 = <&i2c2_0_cfg>;
pinctrl-names = "default";
status = "okay";
@@ -167,6 +168,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
pagesize = <8>;
read-only;
@@ -199,6 +201,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&reg_vcc_4v>;
vin2-supply = <&reg_vcc_4v>;
@@ -212,6 +215,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -226,6 +230,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -254,6 +259,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -353,6 +359,7 @@ &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 eb77aae9d..5e2fde8be 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
@@ -187,6 +187,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&vcc4v0>;
vin2-supply = <&vcc4v0>;
@@ -200,6 +201,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -214,6 +216,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -242,6 +245,7 @@ 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 790234f35..d4adfc5b7 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -214,6 +214,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&vcc4v0>;
vin2-supply = <&vcc4v0>;
@@ -227,6 +228,7 @@ pmic@41 {

regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -241,6 +243,7 @@ buck2 {
};

buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -269,6 +272,7 @@ buck6 {
};

aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -366,6 +370,7 @@ &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