2023-12-17 11:32:31

by Stefan Nagy

Subject: [PATCH v2] arm64: dts: rockchip: Increase maximum frequency of SPI flash for ROCK Pi 4A/B/C

The ROCK Pi 4A/B/C boards come with a 32 Mbit SPI NOR flash chip (XTX
Technology Limited XT25F32) with a maximum clock frequency of 108 MHz.
Use this value for the device node's spi-max-frequency property.

This patch has been tested on ROCK Pi 4A.

Signed-off-by: Stefan Nagy <[email protected]>
---
Changes from v1:
- Use the maximum clock frequency the SPI chip actually supports
instead of the SPI clock frequency limit of 50 MHz set by the
Rockchip SPI driver.
---
arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts | 2 +-
arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts | 2 +-
arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
index d5df8939a..c68f45849 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
@@ -19,6 +19,6 @@ &spi1 {
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
- spi-max-frequency = <10000000>;
+ spi-max-frequency = <108000000>;
};
};
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
index bee6d7588..6ea3180e5 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
@@ -37,7 +37,7 @@ &spi1 {
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
- spi-max-frequency = <10000000>;
+ spi-max-frequency = <108000000>;
};
};

diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
index de2ebe4cb..5274938bf 100644
--- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
@@ -49,7 +49,7 @@ &spi1 {
flash@0 {
compatible = "jedec,spi-nor";
reg = <0>;
- spi-max-frequency = <10000000>;
+ spi-max-frequency = <108000000>;
};
};

--
2.30.2

2023-12-17 15:18:42

by Dragan Simic

Subject: Re: [PATCH v2] arm64: dts: rockchip: Increase maximum frequency of SPI flash for ROCK Pi 4A/B/C

On 2023-12-17 12:32, Stefan Nagy wrote:
> The ROCK Pi 4A/B/C boards come with a 32 Mbit SPI NOR flash chip (XTX
> Technology Limited XT25F32) with a maximum clock frequency of 108 MHz.
> Use this value for the device node's spi-max-frequency property.
>
> This patch has been tested on ROCK Pi 4A.
>
> Signed-off-by: Stefan Nagy <[email protected]>

Looks good to me. It would be nice, if you have time, to include some
SPI benchmark results before and after the change in the commit message.

Otherwise,

Reviewed-by: Dragan Simic <[email protected]>

> ---
> Changes from v1:
> - Use the maximum clock frequency the SPI chip actually supports
> instead of the SPI clock frequency limit of 50 MHz set by the
> Rockchip SPI driver.
> ---
> arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts | 2 +-
> arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts | 2 +-
> arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts | 2 +-
> 3 files changed, 3 insertions(+), 3 deletions(-)
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
> b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
> index d5df8939a..c68f45849 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4a.dts
> @@ -19,6 +19,6 @@ &spi1 {
> flash@0 {
> compatible = "jedec,spi-nor";
> reg = <0>;
> - spi-max-frequency = <10000000>;
> + spi-max-frequency = <108000000>;
> };
> };
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
> b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
> index bee6d7588..6ea3180e5 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4b.dts
> @@ -37,7 +37,7 @@ &spi1 {
> flash@0 {
> compatible = "jedec,spi-nor";
> reg = <0>;
> - spi-max-frequency = <10000000>;
> + spi-max-frequency = <108000000>;
> };
> };
>
> diff --git a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
> b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
> index de2ebe4cb..5274938bf 100644
> --- a/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
> +++ b/arch/arm64/boot/dts/rockchip/rk3399-rock-pi-4c.dts
> @@ -49,7 +49,7 @@ &spi1 {
> flash@0 {
> compatible = "jedec,spi-nor";
> reg = <0>;
> - spi-max-frequency = <10000000>;
> + spi-max-frequency = <108000000>;
> };
> };

2024-01-25 21:20:54

by Heiko Stuebner

Subject: Re: [PATCH v2] arm64: dts: rockchip: Increase maximum frequency of SPI flash for ROCK Pi 4A/B/C

On Sun, 17 Dec 2023 12:32:08 +0100, Stefan Nagy wrote:
> The ROCK Pi 4A/B/C boards come with a 32 Mbit SPI NOR flash chip (XTX
> Technology Limited XT25F32) with a maximum clock frequency of 108 MHz.
> Use this value for the device node's spi-max-frequency property.
>
> This patch has been tested on ROCK Pi 4A.
>
>
> [...]

Applied, thanks!

[1/1] arm64: dts: rockchip: Increase maximum frequency of SPI flash for ROCK Pi 4A/B/C
commit: fa16d7a820e42946c511e331cdd81dde579066b7

Best regards,
--
Heiko Stuebner <[email protected]>