[PATCH v3 2/2] riscv: dts: spacemit: mark K1 board boot devices bootph-pre-ram
From: Hung-Chun Tseng
Date: Sat Oct 24 2026 - 05:27:02 EST
The board EEPROM at 0x50 holds the DRAM configuration (number of chip
selects, data rate and type), which has to be read before DRAM can be
trained. The P1 PMIC at 0x41 supplies the CPU core (buck1), the 1.8 V
rail of the EEPROM (buck3) and the SD card I/O (aldo1), which have to
be set up before that. Boards that boot from SPI NOR also need the
flash.
Mark these board devices bootph-pre-ram on the boards that have them.
Reviewed-by: E Shattow <e@xxxxxxxxxxxx>
Signed-off-by: Hung-Chun Tseng <alan.tseng.cs@xxxxxxxxx>
---
arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi | 5 +++++
arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts | 5 +++++
arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts | 6 ++++++
arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts | 6 ++++++
arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts | 5 +++++
arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts | 6 ++++++
6 files changed, 33 insertions(+)
diff --git a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
index 81c40df2a3..5d1132f5a9 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-cm6.dtsi
@@ -71,6 +71,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>;
pagesize = <16>;
read-only;
@@ -100,6 +101,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <®_vcc_4v>;
vin2-supply = <®_vcc_4v>;
@@ -113,6 +115,7 @@ pmic@41 {
regulators {
buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -127,6 +130,7 @@ buck2 {
};
buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -155,6 +159,7 @@ 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 58035d886b..90c4585d94 100644
--- a/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-bananapi-f3.dts
@@ -194,6 +194,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
pagesize = <16>;
read-only;
@@ -223,6 +224,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <®_vcc_4v>;
vin2-supply = <®_vcc_4v>;
@@ -236,6 +238,7 @@ pmic@41 {
regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -250,6 +253,7 @@ buck2 {
};
buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -278,6 +282,7 @@ 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 635e95aad1..93f486ba60 100644
--- a/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-milkv-jupiter.dts
@@ -208,6 +208,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c04";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC18 */
pagesize = <16>;
read-only;
@@ -230,6 +231,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <®_vcc_4v>;
vin2-supply = <®_vcc_4v>;
@@ -243,6 +245,7 @@ pmic@41 {
regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -257,6 +260,7 @@ buck2 {
};
buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -285,6 +289,7 @@ buck6 {
};
aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -386,6 +391,7 @@ &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 23f32a8a3d..ce7342ed82 100644
--- a/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-musepi-pro.dts
@@ -167,6 +167,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
vcc-supply = <&buck3_1v8>; /* EEPROM_VCC1V8 */
pagesize = <8>;
read-only;
@@ -199,6 +200,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <®_vcc_4v>;
vin2-supply = <®_vcc_4v>;
@@ -212,6 +214,7 @@ pmic@41 {
regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -226,6 +229,7 @@ buck2 {
};
buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -254,6 +258,7 @@ buck6 {
};
aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -353,6 +358,7 @@ &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 eb77aae9d6..83ad1cc06d 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-r2s.dts
@@ -158,6 +158,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
pagesize = <16>;
size = <256>;
read-only;
@@ -187,6 +188,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&vcc4v0>;
vin2-supply = <&vcc4v0>;
@@ -200,6 +202,7 @@ pmic@41 {
regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -214,6 +217,7 @@ buck2 {
};
buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -242,6 +246,7 @@ 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 790234f355..dba5f8a021 100644
--- a/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
+++ b/arch/riscv/boot/dts/spacemit/k1-orangepi-rv2.dts
@@ -185,6 +185,7 @@ &i2c2 {
eeprom@50 {
compatible = "atmel,24c02";
reg = <0x50>;
+ bootph-pre-ram;
pagesize = <16>;
size = <256>;
read-only;
@@ -214,6 +215,7 @@ &i2c8 {
pmic@41 {
compatible = "spacemit,p1";
reg = <0x41>;
+ bootph-pre-ram;
interrupts = <64>;
vin1-supply = <&vcc4v0>;
vin2-supply = <&vcc4v0>;
@@ -227,6 +229,7 @@ pmic@41 {
regulators {
buck1_0v9: buck1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1050000>;
regulator-ramp-delay = <5000>;
@@ -241,6 +244,7 @@ buck2 {
};
buck3_1v8: buck3 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <1800000>;
regulator-ramp-delay = <5000>;
@@ -269,6 +273,7 @@ buck6 {
};
aldo1: aldo1 {
+ bootph-pre-ram;
regulator-min-microvolt = <500000>;
regulator-max-microvolt = <3400000>;
regulator-boot-on;
@@ -366,6 +371,7 @@ &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