[PATCH 0/4] arm64: dts: rockchip: Fix eeprom description for Radxa ROCK 3C/5A/5C

[PATCH 0/4] arm64: dts: rockchip: Fix eeprom description for Radxa ROCK 3C/5A/5C

[FUKAUMI Naoki]

This patch series fixes incorrect or missing entries related to the
eeprom on the Radxa ROCK 3C, 5A, and 5C.

FUKAUMI Naoki (4):
  arm64: dts: rockchip: Move eeprom correct bus for Radxa ROCK 5A
  arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 5A
  arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 3C
  arm64: dts: rockchip: Make eeprom read-only for Radxa ROCK 3C/5A/5C

 arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts  |  2 ++
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 16 +++++++++-------
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts |  1 +
 3 files changed, 12 insertions(+), 7 deletions(-)

-- 
2.43.0

[PATCH 1/4] arm64: dts: rockchip: Move eeprom correct bus for Radxa ROCK 5A

[FUKAUMI Naoki]

BL24C16 EEPROM chip found on Radxa ROCK 5A is connected on i2c0 bus.
Move eeprom node from i2c2 to i2c0.

Fixes: 89c880808cff8 ("arm64: dts: rockchip: add I2C EEPROM to rock-5a")
Link: https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
---
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
index 19a08f7794e67..428c6f0232a34 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
@@ -228,6 +228,12 @@ regulator-state-mem {
 			regulator-off-in-suspend;
 		};
 	};
+
+	eeprom: eeprom@50 {
+		compatible = "belling,bl24c16a", "atmel,24c16";
+		reg = <0x50>;
+		pagesize = <16>;
+	};
 };
 
 &i2c2 {
@@ -249,12 +255,6 @@ regulator-state-mem {
 			regulator-off-in-suspend;
 		};
 	};
-
-	eeprom: eeprom@50 {
-		compatible = "belling,bl24c16a", "atmel,24c16";
-		reg = <0x50>;
-		pagesize = <16>;
-	};
 };
 
 &i2c3 {
-- 
2.43.0

[PATCH 2/4] arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 5A

[FUKAUMI Naoki]

The VCC supply for the BL24C16 EEPROM chip found on Radxa ROCK 5A is
vcc_3v3_pmu, which is routed to vcc_3v3_s3 via a zero-ohm resistor.
Describe this supply.

Fixes: 89c880808cff8 ("arm64: dts: rockchip: add I2C EEPROM to rock-5a")
Link: https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
---
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
index 428c6f0232a34..041a0fff22ccb 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
@@ -233,6 +233,7 @@ eeprom: eeprom@50 {
 		compatible = "belling,bl24c16a", "atmel,24c16";
 		reg = <0x50>;
 		pagesize = <16>;
+		vcc-supply = <&vcc_3v3_pmu>;
 	};
 };
 
@@ -600,7 +601,7 @@ regulator-state-mem {
 				};
 			};
 
-			vcc_3v3_s3: dcdc-reg8 {
+			vcc_3v3_pmu: vcc_3v3_s3: dcdc-reg8 {
 				regulator-name = "vcc_3v3_s3";
 				regulator-always-on;
 				regulator-boot-on;
-- 
2.43.0

[PATCH 3/4] arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 3C

[FUKAUMI Naoki]

The VCC supply for the BL24C16 EEPROM chip found on Radxa ROCK 3C is
vcca1v8_pmu.
Describe this supply.

Fixes: ee219017ddb50 ("arm64: dts: rockchip: Add Radxa ROCK 3C")
Link: https://dl.radxa.com/rock3/docs/hw/3c/v1400/radxa_rock_3c_v1400_schematic.pdf p.13
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
---
 arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
index 6224d72813e59..80ac40555e023 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
@@ -466,6 +466,7 @@ eeprom: eeprom@50 {
 		compatible = "belling,bl24c16a", "atmel,24c16";
 		reg = <0x50>;
 		pagesize = <16>;
+		vcc-supply = <&vcca1v8_pmu>;
 	};
 };
 
-- 
2.43.0

[PATCH 4/4] arm64: dts: rockchip: Make eeprom read-only for Radxa ROCK 3C/5A/5C

[FUKAUMI Naoki]

Make the BL24C16 EEPROM chips found on Radxa ROCK 3C, 5A and 5C SBCs
read-only, because they contain factory-programmed data that isn't
supposed to be modified by the end users.

Fixes: ee219017ddb50 ("arm64: dts: rockchip: Add Radxa ROCK 3C")
Fixes: 89c880808cff8 ("arm64: dts: rockchip: add I2C EEPROM to rock-5a")
Fixes: 3ddf5cdb77e6e ("arm64: dts: rockchip: add Radxa ROCK 5C")
Link: https://dl.radxa.com/rock3/docs/hw/3c/v1400/radxa_rock_3c_v1400_schematic.pdf p.13
Link: https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19
Link: https://dl.radxa.com/rock5/5c/docs/hw/v1100/radxa_rock_5c_schematic_v1100.pdf p.18
Link: https://github.com/radxa/u-boot/blob/next-dev-v2024.10/drivers/misc/radxa-i2c-eeprom.c
Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
---
 arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts  | 1 +
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 1 +
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts | 1 +
 3 files changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
index 80ac40555e023..fa28b32f69108 100644
--- a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
@@ -466,6 +466,7 @@ eeprom: eeprom@50 {
 		compatible = "belling,bl24c16a", "atmel,24c16";
 		reg = <0x50>;
 		pagesize = <16>;
+		read-only;
 		vcc-supply = <&vcca1v8_pmu>;
 	};
 };
diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
index 041a0fff22ccb..d844a842d4cce 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
@@ -233,6 +233,7 @@ eeprom: eeprom@50 {
 		compatible = "belling,bl24c16a", "atmel,24c16";
 		reg = <0x50>;
 		pagesize = <16>;
+		read-only;
 		vcc-supply = <&vcc_3v3_pmu>;
 	};
 };
diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
index dd7317bab6135..665eecce063a8 100644
--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
@@ -325,6 +325,7 @@ eeprom@50 {
 		compatible = "belling,bl24c16a", "atmel,24c16";
 		reg = <0x50>;
 		pagesize = <16>;
+		read-only;
 		vcc-supply = <&vcc_3v3_pmu>;
 	};
 };
-- 
2.43.0

Re: [PATCH 1/4] arm64: dts: rockchip: Move eeprom correct bus for Radxa ROCK 5A

[Dragan Simic]

Hello Naoki,

Thanks for this patch.  Please, see a couple of remarks below.

On Tuesday, November 11, 2025 06:09 CET, FUKAUMI Naoki <naoki@radxa.com> wrote:
> BL24C16 EEPROM chip found on Radxa ROCK 5A is connected on i2c0 bus.
> Move eeprom node from i2c2 to i2c0.

I'd suggest that the patch subject is reworded a bit like this:

  arm64: dts: rockchip: Move the EEPROM to correct I2C bus on Radxa ROCK 5A

Also, the patch description would benefit from becoming reworded
like this:

  The BL24C16 EEPROM chip found on Radxa ROCK 5A is connected
  to the i2c0 bus, [1] so move the eeprom node from the i2c2 bus
  to the i2c0 bus.

  [1] https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf, pp. 19

> Fixes: 89c880808cff8 ("arm64: dts: rockchip: add I2C EEPROM to rock-5a")
> Link: https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19

The suggestion above also shows how it would be better to use
explicitly placed references, instead of just placing them into
the Links lines, because that places the refernces closer to
the backed contents.  This isn't critical in this case, because
there isn't much contents, but it's a good practice nonetheless.

> Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> index 19a08f7794e67..428c6f0232a34 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> @@ -228,6 +228,12 @@ regulator-state-mem {
>  			regulator-off-in-suspend;
>  		};
>  	};
> +
> +	eeprom: eeprom@50 {
> +		compatible = "belling,bl24c16a", "atmel,24c16";
> +		reg = <0x50>;
> +		pagesize = <16>;
> +	};
>  };
>  
>  &i2c2 {
> @@ -249,12 +255,6 @@ regulator-state-mem {
>  			regulator-off-in-suspend;
>  		};
>  	};
> -
> -	eeprom: eeprom@50 {
> -		compatible = "belling,bl24c16a", "atmel,24c16";
> -		reg = <0x50>;
> -		pagesize = <16>;
> -	};
>  };
>  
>  &i2c3 {

Re: [PATCH 2/4] arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 5A

[Dragan Simic]

Hello Naoki,

Thanks for this patch.  Please, see one remark below.

On Tuesday, November 11, 2025 06:09 CET, FUKAUMI Naoki <naoki@radxa.com> wrote:
> The VCC supply for the BL24C16 EEPROM chip found on Radxa ROCK 5A is
> vcc_3v3_pmu, which is routed to vcc_3v3_s3 via a zero-ohm resistor.
> Describe this supply.
> 
> Fixes: 89c880808cff8 ("arm64: dts: rockchip: add I2C EEPROM to rock-5a")
> Link: https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19

The same suggestion about using explicitly placed references, from
the patch 1/4 in this series, applies here as well.

> Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> index 428c6f0232a34..041a0fff22ccb 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> @@ -233,6 +233,7 @@ eeprom: eeprom@50 {
>  		compatible = "belling,bl24c16a", "atmel,24c16";
>  		reg = <0x50>;
>  		pagesize = <16>;
> +		vcc-supply = <&vcc_3v3_pmu>;
>  	};
>  };
>  
> @@ -600,7 +601,7 @@ regulator-state-mem {
>  				};
>  			};
>  
> -			vcc_3v3_s3: dcdc-reg8 {
> +			vcc_3v3_pmu: vcc_3v3_s3: dcdc-reg8 {
>  				regulator-name = "vcc_3v3_s3";
>  				regulator-always-on;
>  				regulator-boot-on;

Re: [PATCH 3/4] arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 3C

[Dragan Simic]

Hello Naoki,

Thanks for this patch.  Please, see a couple of remarks below.

On Tuesday, November 11, 2025 06:09 CET, FUKAUMI Naoki <naoki@radxa.com> wrote:
> The VCC supply for the BL24C16 EEPROM chip found on Radxa ROCK 3C is
> vcca1v8_pmu.

There's no need for a line break here.

> Describe this supply.
> 
> Fixes: ee219017ddb50 ("arm64: dts: rockchip: Add Radxa ROCK 3C")
> Link: https://dl.radxa.com/rock3/docs/hw/3c/v1400/radxa_rock_3c_v1400_schematic.pdf p.13

The same suggestion about using explicitly placed references, from
the patch 1/4 in this series, applies here as well.

> Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
> index 6224d72813e59..80ac40555e023 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
> @@ -466,6 +466,7 @@ eeprom: eeprom@50 {
>  		compatible = "belling,bl24c16a", "atmel,24c16";
>  		reg = <0x50>;
>  		pagesize = <16>;
> +		vcc-supply = <&vcca1v8_pmu>;
>  	};
>  };

Re: [PATCH 4/4] arm64: dts: rockchip: Make eeprom read-only for Radxa ROCK 3C/5A/5C

[Dragan Simic]

Hello Naoki,

Thanks for this patch.  Please, see one remark below.

On Tuesday, November 11, 2025 06:09 CET, FUKAUMI Naoki <naoki@radxa.com> wrote:
> Make the BL24C16 EEPROM chips found on Radxa ROCK 3C, 5A and 5C SBCs
> read-only, because they contain factory-programmed data that isn't
> supposed to be modified by the end users.
> 
> Fixes: ee219017ddb50 ("arm64: dts: rockchip: Add Radxa ROCK 3C")
> Fixes: 89c880808cff8 ("arm64: dts: rockchip: add I2C EEPROM to rock-5a")
> Fixes: 3ddf5cdb77e6e ("arm64: dts: rockchip: add Radxa ROCK 5C")
> Link: https://dl.radxa.com/rock3/docs/hw/3c/v1400/radxa_rock_3c_v1400_schematic.pdf p.13
> Link: https://dl.radxa.com/rock5/5a/docs/hw/radxa_rock5a_V1.1_sch.pdf p.19
> Link: https://dl.radxa.com/rock5/5c/docs/hw/v1100/radxa_rock_5c_schematic_v1100.pdf p.18
> Link: https://github.com/radxa/u-boot/blob/next-dev-v2024.10/drivers/misc/radxa-i2c-eeprom.c

The same suggestion about using explicitly placed references, from
the patch 1/4 in this series, applies here as well.

> Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
> ---
>  arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts  | 1 +
>  arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 1 +
>  arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts | 1 +
>  3 files changed, 3 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
> index 80ac40555e023..fa28b32f69108 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts
> @@ -466,6 +466,7 @@ eeprom: eeprom@50 {
>  		compatible = "belling,bl24c16a", "atmel,24c16";
>  		reg = <0x50>;
>  		pagesize = <16>;
> +		read-only;
>  		vcc-supply = <&vcca1v8_pmu>;
>  	};
>  };
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> index 041a0fff22ccb..d844a842d4cce 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
> @@ -233,6 +233,7 @@ eeprom: eeprom@50 {
>  		compatible = "belling,bl24c16a", "atmel,24c16";
>  		reg = <0x50>;
>  		pagesize = <16>;
> +		read-only;
>  		vcc-supply = <&vcc_3v3_pmu>;
>  	};
>  };
> diff --git a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
> index dd7317bab6135..665eecce063a8 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts
> @@ -325,6 +325,7 @@ eeprom@50 {
>  		compatible = "belling,bl24c16a", "atmel,24c16";
>  		reg = <0x50>;
>  		pagesize = <16>;
> +		read-only;
>  		vcc-supply = <&vcc_3v3_pmu>;
>  	};
>  };

Re: [PATCH 0/4] arm64: dts: rockchip: Fix eeprom description for Radxa ROCK 3C/5A/5C

[Dragan Simic]

Hello Naoki,

On Tuesday, November 11, 2025 06:09 CET, FUKAUMI Naoki <naoki@radxa.com> wrote:
> This patch series fixes incorrect or missing entries related to the
> eeprom on the Radxa ROCK 3C, 5A, and 5C.

In general, there's no need for the standard prefixes in the
subjects of cover letters.  Thus, in this case the subject
could be reworded like this:

  Fix and improve EEPROM chip descriptions for Radxa ROCK 3C, 5A and 5C

> FUKAUMI Naoki (4):
>   arm64: dts: rockchip: Move eeprom correct bus for Radxa ROCK 5A
>   arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 5A
>   arm64: dts: rockchip: Add eeprom vcc-supply for Radxa ROCK 3C
>   arm64: dts: rockchip: Make eeprom read-only for Radxa ROCK 3C/5A/5C
> 
>  arch/arm64/boot/dts/rockchip/rk3566-rock-3c.dts  |  2 ++
>  arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 16 +++++++++-------
>  arch/arm64/boot/dts/rockchip/rk3588s-rock-5c.dts |  1 +
>  3 files changed, 12 insertions(+), 7 deletions(-)
> 
> -- 
> 2.43.0
>